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Boring curved or redirected bores

Subclass of:

175 - Boring or penetrating the earth

175057000 - PROCESSES

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DocumentTitleDate
20130043076Rotary Steerable Assembly Inhibiting Counterclockwise Whirl During Directional Drilling - A bottom hole assembly avoids damaging vibrations that can develop during directional drilling with a rotary steerable system. The assembly has a drill bit, a first collar that rotates with the bit, a rotary steerable tool that controls the bit's trajectory, and a second collar that rotates with the drill string. The first collar between the bit and the tool defines a bend that deflects the bit from the first collar's axis. During operation, this bend causes portion of the assembly to engage the borehole wall to inhibit counterclockwise (CCW) bit whirl by promoting clockwise whirl in the assembly, generating friction against the borehole wall, and dampening vibrations. By inhibiting CCW bit whirl, other damaging vibrations such as CCW whirl in the drill string can also be prevented up the borehole. Alternatively, only the second collar between the tool and the drill string may define the bend, or both collars can define bends.02-21-2013
20130043077METHODS AND SYSTEMS FOR DESIGNING AND/OR SELECTING DRILLING EQUIPMENT USING PREDICTIONS OF ROTARY DRILL BIT WALK - Methods and systems may be provided simulating forming a wide variety of directional wellbores including wellbores with variable tilt rates and/or relatively constant tilt rates. The methods and systems may also be used to simulate forming a wellbore in subterranean formations having a combination of soft, medium and hard formation materials, multiple layers of formation materials and relatively hard stringers disposed throughout one or more layers of formation material. Values of bit walk rate from such simulations may be used to design and/or select drilling equipment for use in forming a directional wellbore.02-21-2013
20100155142SYSTEM AND METHOD FOR PERFORMING AN ADAPTIVE DRILLING OPERATION - A system and method for performing an adaptive drilling operation is provided. The method involves obtaining data prior to drilling, constructing a base model with a base model unit from data obtained prior to drilling, constructing an overburden posterior model with an overburden model unit using the base model and data obtained from overburden drilling, constructing a reservoir posterior model with a reservoir model unit using the overburden posterior model and the data obtained from reservoir drilling and updating drilling operation based on the models.06-24-2010
20100018772ARTICULATED EXTRACTION PIPE - The invention concerns a bore screen comprising a plurality of perforated rigid tubular modules (01-28-2010
20090183921FLOW OPERATED ORIENTER - Embodiments of the present invention generally relate to a flow operated orienter. In one embodiment, a bottom hole assembly (BHA) for use in drilling a wellbore includes: a first mud motor having a stator and a rotor; a second mud motor having stator and a rotor; a drill bit rotationally coupled to the second rotor and having a tool face and a longitudinal axis inclined relative to a longitudinal axis of the first mud motor; and a clutch. The clutch is operable to: rotationally couple the second stator to the first stator in a first mode at a first orientation of the tool face, rotationally couple the first rotor to the second stator in a second mode, change the first orientation to a second orientation by a predetermined increment, orient the tool face at the second orientation in an orienting mode, and shift among the modes in response a change in flow rate of a fluid injected through the orienter and/or a change in weight exerted on the drill bit.07-23-2009
20100147591MULTIPHASE DRILLING SYSTEMS AND METHODS - In one embodiment, a method for drilling a wellbore includes injecting drilling fluid through a drill string disposed in the wellbore and rotating a drill bit disposed on a bottom of the drill string. The drilling fluid includes a liquid and a gas. The drilling fluid is injected at the surface. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The drilling fluid and cuttings (returns) flow to the surface via an annulus formed between the drill string and the wellbore. The liquid is injected at a rate so that a liquid velocity of the returns in the annulus is sufficient to transport the cuttings. The method further includes drilling through at least a portion of a non-productive formation.06-17-2010
20090194334System and method for drilling - This disclosure relates in general to a method and system for controlling a drilling system for drilling a borehole in an earth formation. More specifically, but not by way of limitation, embodiments of the present invention provide systems and methods for controlling dynamic interactions between the drilling system for drilling the borehole and an inner surface of the borehole being drilled to steer the drilling system to directionally drill the borehole. In another embodiment of the present invention, data regarding the functioning of the drilling system as it drills the borehole may be sensed and interactions between the drilling system for drilling the borehole and an inner surface of the borehole may be controlled in response to the sensed data to control the drilling system as the borehole is being drilled.08-06-2009
20130075164Point The Bit Rotary Steerable System - A method, device, and system is described herein for pointing a rotary drill bit. A rotary bit pointing device is positioned between a proximal end of a control shaft and a universal joint. As the bottom hole assembly rotates, various portions of the rotary bit pointing device are enabled and subsequently disabled to apply a substantially constant force in a substantially constant direction to the control shaft. Such a force causes the distal end of the control shaft to point the rotary drill bit in a target direction.03-28-2013
20100032212Downhole adjustable bent-angle mechanism for use with a motor for directional drilling - A housing including longitudinally extending tubular members interconnected to allow controlled relative bending thereof, during a drilling operation, a rotary drive transmitting torsion bar extending generally longitudinally within the housing to controllably bend in response to relative bending of said members, a rotary drill bit operatively connected to said torsion bar to be rotated as the bar rotates, a rotary drive operatively connected to the torsion bar to rotate the bar, means for controlling relative bending of the said members during torsion bar rotation and as a function of such rotation.02-11-2010
20100071956Drill Bit With Adjustable Axial Pad For Controlling Torsional Fluctuations - An embodiment according to the disclosure provides a drill bit that includes a pad on a face section thereof, which pad extends from the bottom section upon application of a force thereon and retracts upon the removal of the force to control fluctuations of the drill bit during drilling of a wellbore.03-25-2010
20130032407METHODS AND SYSTEMS FOR DRILLING - A method of controlling a direction of a toolface of a bottom hole assembly for slide drilling, comprises a) synchronizing the toolface wherein synchronizing the toolface comprises determining a relationship between the rotational position of the down hole toolface with a rotational position at the surface of the formation for at least one point in time, b) stopping rotation of the drill string coupled to the bottom hole assembly, c) controlling torque at the surface of the drill string to control a rotational position of the toolface, and d) commencing a slide of the drill string.02-07-2013
20090114448EXPANDABLE ROLLER REAMER - An expandable downhole tool for use in a drilling assembly positioned within a wellbore includes a tool body having an axial flowbore extending therethrough and a moveable arm. The moveable arm includes a roller structure including cutters and rotatably mounted on the moveable arm. The moveable arm is configured to move outwardly in response to actuation of the expandable downhole tool.05-07-2009
20130032408Hydrocarbon Recovery Drill String Apparatus, Subterranean Hydrocarbon Recovery Drilling Methods, and Subterranean Hydrocarbon Recovery Methods - Disclosed are hydrocarbon recovery drill string apparatus, subterranean hydrocarbon recovery drilling methods, and subterranean hydrocarbon recovery methods. In one embodiment, a hydrocarbon recovery drill string apparatus includes an elongated assembly within which a rotatable drill rod is received. The assembly comprises a longitudinal axis, a drill rod entrance end, and a drill rod exit end. The assembly comprises a tailcuttings diverter pipe proximate the drill rod exit end, with the tailcuttings diverter pipe defining an initial fluid flow path of the tailcuttings from the longitudinal axis which is acute from the longitudinal axis. Other apparatus and method aspects are contemplated.02-07-2013
20100044110Ultra-low friction coatings for drill stem assemblies - Provided are drill stem assemblies with ultra-low friction coatings for subterraneous drilling operations. In one form, the coated drill stem assemblies for subterraneous rotary drilling operations include a body assembly with an exposed outer surface including a drill string coupled to a bottom hole assembly or a coiled tubing coupled to a bottom hole assembly and an ultra-low friction coating on at least a portion of the exposed outer surface of the body assembly, wherein the coefficient of friction of the ultra-low friction coating is less than or equal to 0.15. The coated drill stem assemblies disclosed herein provide for reduced friction, vibration (stick-slip and torsional), abrasion and wear during straight hole or directional drilling to allow for improved rates of penetration and enable ultra-extended reach drilling with existing top drives.02-25-2010
20090159339Adjustable bent housing apparatus and method - An apparatus for controlling the direction of drill bit within a wellbore. The apparatus comprises a first housing with a first housing axis therein, and wherein the first housing has a first threaded opening having a first threaded opening axis. The first housing has a helical end. A second housing is included, and the second housing contains a second housing axis, and a second threaded opening having a second threaded opening axis configured to engage with the first threaded opening. A collar is included that has a helical collar end that engages the helical collar end and wherein the helical collar end is configured reciprocal to the helical end, and rotational displacement of the first housing relative to the collar will angularly displace the drill bit axis. The apparatus may further include spline members for locking the collar in place relative to the first and second housing.06-25-2009
20100108392Method and apparatus for constructing deep vertical boreholes and underground cut-off walls - A method and apparatus for constructing large vertical boreholes and underground cut-off walls is disclosed. A drill rig assembly with double rotary heads drives a small diameter drill string and a much larger diameter drill string which is concentric with the smaller drill string and has a donut shaped drill bit configuration at the lower end thereof. Preferably, a steerable mud motor/drill is provided on one end of the small drill string and is guided to make as vertical a borehole as possible. In a preferred embodiment, the small inner drill is advanced to the full depth using the steerable mud motor/drill to achieve a high degree of verticality and a slight smaller casing is installed and used as a verticality guide for the much larger diameter outer drill string. In a further embodiment, the inner drill string is advanced a predetermined distance, then the outer string is advanced using the inner string as a verticality guide, these steps being repeated in alternating fashion to the final depth.05-06-2010
20130048384APPARATUS AND METHOD FOR CONTROLLING OR LIMITING ROTOR ORBIT IN MOVING CAVITY MOTORS AND PUMPS - A moving cavity motor or pump, such as a mud motor, comprising: a rotor, a stator, and one or more apparatus for constraining (i.e., controlling or limiting) the movement of the rotor relative to the stator.02-28-2013
20130048383MINIMUM STRAIN ENERGY WAYPOINT-FOLLOWING CONTROLLER FOR DIRECTIONAL DRILLING USING OPTIMIZED GEOMETRIC HERMITE CURVES - A method and apparatus for controlling drilling, the method comprising ascertaining a current position and attitude of a drilling structure, obtaining a desired end point for the drilling structure, creating an optimized geometric Hermite curve path for the drilling structure from the current position and attitude of the drilling structure to the desired end point for the drilling structure and controlling a drilling of the drilling structure from the current position and attitude of the drilling structure to the desired end point for the drilling structure along the optimized geometric Hermite curve path.02-28-2013
20130056278Apparatus and Method for Placement of Downhole Tools Using a Visual Imaging Device - A method of orienting depth and direction (azimuth) of a guide device used to direct tools for the creation of a lateral borehole extending from a wellbore in an earthen formation, utilizing a visual imaging tool. The method including running a tool string into a wellbore, the tool string comprising a guide device and a visual imaging device, visually imaging the wellbore at a range of depths and orientations in the wellbore, and aligning the guide device within the wellbore in preparation of drilling tools to be used for the creation of a lateral borehole in an earthen formation.03-07-2013
20130056277Method and Device for Producing an Opening from a Motherbore and into a Formation - A method and device for producing an opening from a motherbore into the surrounding formation, wherein the method includes: positioning a motor, having a rotatable barrel, in the motherbore; passing an elongated body through the barrel; and letting the motor rotate the elongated body as the elongated body is moved along the barrel and into the formation.03-07-2013
20120217068Lateral Well Drilling Apparatus and Method - In one aspect, a drilling apparatus is provided, where the drilling apparatus includes a fluid pump disposed in a main wellbore, a lateral well in fluid communication with the fluid pump and a drilling assembly disposed in the lateral well, wherein the drilling assembly is configured to receive a fluid from the fluid pump to power the drilling assembly and to transport cuttings from the drilling assembly to the main wellbore. The drilling apparatus further includes a sealing mechanism disposed in the main wellbore, the sealing mechanism being configured to direct the cuttings in the fluid downhole of the sealing mechanism.08-30-2012
20090057017Multiple Pulsejet Boring Device - A method and device for boring a hole [03-05-2009
20110011646APPARATUS AND METHODS FOR DRILLING A WELLBORE USING CASING - Apparatus and methods for drilling with casing. In an embodiment, methods and apparatus for deflecting casing using a diverter apparatus are disclosed. In another embodiment, the apparatus comprises a motor operating system disposed in a motor system housing, a shaft operatively connected to the motor operating system, the shaft having a passageway, and a divert assembly disposed to direct fluid flow selectively to the motor operating system and the passageway in the shaft. In another aspect, methods and apparatus for directionally drilling a casing into the formation are disclosed. Methods and apparatus for measuring the trajectory of a wellbore while directionally drilling a casing into the formation are also described.01-20-2011
20100218997CUTTING DEVICE WITH MULTIPLE CUTTING STRUCTURES - A cutting device for downhole operations includes a first cutting structure, and a second cutting structure, wherein at least the second cutting structure is selectively presentable for operation. A method of performing a downhole cutting operation comprises running into a well bore a cutting device including a plurality of cutting structures, performing a first cutting operation with a first cutting structure of the cutting device, moving the first cutting structure to selectively present a second cutting structure of the cutting device, and performing a second cutting operation with at least the second cutting structure. The method may further include aligning movable cutting structures of the cutting device to allow the second cutting structure to be selectively presented.09-02-2010
20110108327DIRECTIONAL DRILLING CONTROL USING PERIODIC PERTURBATION OF THE DRILL BIT - Disclosed herein is a system for steering the direction of a borehole advanced by cutting action of a rotary drill bit by periodically varying action of a drill bit while continuously rotating a drill string to which the drill bit is operationally attached. The steering system can include a bit perturbation device cooperating with a bent housing subsection and operationally connected to the drill string and to the drill bit. Drill bit action can be varied by periodically varying the rotation speed and/or rate of penetration of the drill bit. Periodic drill bit action results in preferential cutting of material from a predetermined arc of the borehole wall which, in turn, results in borehole deviation. Action of the drill bit can be varied independently of the rotation rate of the drill string.05-12-2011
20110278070SYSTEM AND METHOD FOR DRILLING LATERAL BOREHOLES - A drilling system for drilling a lateral borehole from a main borehole comprises a tubular conduit through which a fluid can be pumped, and a drilling assembly connected to the tubular conduit so as to receive fluid pumped therethrough. The drilling assembly comprises a power conversion unit, through which the fluid flows and which operates to provide a downhole power output; a drilling unit including a drilling apparatus powered by the output of the power conversion unit and operable to drill a lateral borehole into the formation surrounding the main borehole, and a liner unit for storing one or more liners for installation into the lateral borehole; and an anchor unit operable to anchor the drilling assembly in the main borehole when the drilling unit operates to drill the lateral borehole. A method of drilling a lateral borehole from a main borehole using such a drilling system comprises positioning the drilling assembly in the main borehole at a location of interest using the tubular conveyance; anchoring the drilling assembly in the main borehole using the anchor unit; operating the drilling unit to drill a lateral borehole from the main borehole; retrieving the drilling unit from the lateral borehole; releasing the anchor unit; and moving the drilling assembly to another location.11-17-2011
20110284292Apparatus and Method for Steerable Drilling - A method for drilling a wellbore comprises extending a rotatable drill string in the wellbore, where the drill string has a bottom hole assembly coupled to a bottom end thereof. A lower section of the bottom hole assembly comprising a steering apparatus is coupled to an upper section of the bottom hole assembly with a controllably adjustable clutch. A steering apparatus toolface angle is detected. The clutch is controllably adjusted to maintain the steering apparatus toolface angle within a predetermined range about a target steering apparatus toolface angle while rotating the upper section with the drill string.11-24-2011
20090321139Rotary Drill Bit Steerable System and Method - A drill bit comprising: a cutting section comprising gage cutters, wherein in the cutting section is a first end of the bit, and wherein the cutting section has a full gage diameter; a heel section comprising a blade, wherein the heel section is at an end of the drill bit opposite the cutting section, and wherein a diameter of the heel section is a full gage diameter, wherein the blade has a high spiral around the drill bit; and a clearance section between the cutting and heel sections, wherein the clearance section comprises a diameter less than full gage, and wherein clearance section extends from the gage cutters of the cutting section to the blade of the heel section.12-31-2009
20090020335METHODS, SYSTEMS AND APPARATUS FOR PRODUCTION OF HYDROCARBONS FROM A SUBTERRANEAN FORMATION - Methods, systems, and apparatus that are suitable for use in production of hydrocarbons from subterranean heavy oil deposits employ a subterranean cavity in communication with a borehole. The cavity is preferably formed along a U-tube borehole by coiled tubing reaming operations and/or radial drilling and explosive blasting01-22-2009
20110259644CURVED STRUCTURAL PIPE SHOE - A system for orienting a drill bit prior to drilling into a formation, comprising a first pipe having an inside pipe diameter, the first pipe being positioned in a hole in the formation, and a curved shoe positioned in said first pipe at a desired orientation, said curved shoe including a funnel portion having an outlet that is off-center within the first pipe and a guide portion having a guide inlet in communication with the funnel outlet and an guide outlet that is off-center within the first pipe, the guide outlet occupying a different azimuthal position within the first pipe than is occupied by the guide inlet.10-27-2011
20090260884Steering Device for Downhole Tools - An apparatus for drilling a wellbore may include a first section, a second section, and a third section, all of which are rotatably interconnected with pivot bearings and positioned along a drill string. The second section and the third section may be configured to form a controllable bend angle in the drill string. The first section, the second section, and the third section may be configured as sleeves that surround a portion of the drill string. One or more sections may include locking pads that selectively engage a wall of the wellbore. A hydraulic locking device for controlling a direction of rotation of the second section may include one or more brake elements and a reverse spinning sleeve. A first brake element may be used engage the reverse spinning sleeve and a second brake element may be used to engage a drive shaft.10-22-2009
20100018773Tilted Drive Sub - A tilted drive sub is disclosed with a center line of the internal diameter (ID) offset at an angle from the center line of the outer diameter (OD) starting at a point near to a top end of the tilted drive sub. This results in the ID being at an angle to the OD, with the OD of the tilted drive sub remaining straight. The offset ID has the same threads of a mud motor without a tilted drive sub. The tilted drive sub replaces the outer bearing housing of a normal performance mud motor.01-28-2010
20120228032EXPANDABLE WINDOW MILLING BIT AND METHODS OF MILLING A WINDOW IN CASING - A method of milling a window through a casing in a primary well bore and drilling an enlarged sidetracked well bore comprises running into the primary well bore a drilling assembly comprising at least one cutting apparatus adapted to drill an enlarged borehole, milling a window through the casing, and drilling the enlarged sidetracked well bore, wherein the milling and drilling steps are performed in one trip into the primary well bore.09-13-2012
20100089649DRILL BIT WITH CONTINUOUSLY SHARP EDGE CUTTING ELEMENTS - A method of optimizing drill bit design and an optimized drill bit for drilling a well into an earth formation comprising a bit body; a number of blades spaced around the bit body, each blade having a curved outer edge and a forward face; a first row of cutter pockets recessed into the face along the outer edge of each blade; a second group of cutter pockets recessed into the face of each blade offset from the first row; and a plurality of cutting elements, each cutting element being brazed into a different one of the cutter pockets.04-15-2010
20100006341STEERABLE PILOTED DRILL BIT, DRILL SYSTEM, AND METHOD OF DRILLING CURVED BOREHOLES - The present invention provides apparatus and methods for controlled steering. One embodiment of the invention provides a bit body comprising a trailing end, a pilot section, and a reaming section. The trailing end is adapted to be detachably secured to a drill string. The pilot section is located on a leading, opposite end of the bit body. The reaming section is located intermediate to the leading and trailing ends. The pilot section comprises at least one steering device for steering the pilot section of the bit body, thereby steering the entire bit body. Another embodiment of the invention provides a wellsite system comprising a drill string; a kelly coupled to the drill string; and a bit body as described above. Another embodiment of the invention provides a method of drilling a curved borehole in a subsurface formation.01-14-2010
20120292115Drill Bits and Methods of Drilling Curved Boreholes - The invention provides drill bits and methods of drilling curved boreholes. One aspect of the invention provides a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths. Another aspect of the invention provides a method for drilling a curved borehole. The method includes: providing a drill string including a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths; rotating the drill string; and selectively actuating the one or more blades to a plurality of cut depths; thereby drilling a curved borehole.11-22-2012
20100101864ANTI-WHIRL DRILL BITS, WELLSITE SYSTEMS, AND METHODS OF USING THE SAME - A wellsite system includes a drill string suspended within a borehole, anti-whirl drill bits for use in the system, and methods of drilling a curved borehole in a subsurface formation. The drill bit can have an interior cavity in fluid communication with the drill string and a first gauge pad located on the exterior of the drill bit. The first gauge pad includes a first orifice in fluid communication with the interior cavity, where the first orifice is arranged at an angle relative to cutters fixed to the drill bit. The drill bit is configured such that a fluid continuously flows from the first orifice.04-29-2010
20120031677DIRECTIONAL WELLBORE CONTROL BY PILOT HOLE GUIDANCE - A directional drilling apparatus include a first cutter that substantially cuts a wellbore bottom along a first axis and a second cutter that cuts the wellbore bottom along a second axis different from the first axis. The second cutter may extend an adjustable amount out of the first cutter. In another embodiment, a pilot string may connect the second cutter to the first cutter.02-09-2012
20110180327Mulitmodal Geosteering Systems and Methods - Multimodal geosteering systems and methods are disclosed. Some disclosed tool embodiments include first and second transmitter-receiver arrangements that make geosteering measurements using different forms of energy (such as acoustic and electromagnetic energy) to provide geosteering measurements that at least indicate a boundary direction but may also indicate a boundary distance. Some disclosed method embodiments include: determining a direction to a bed boundary using measurements with different energy types; and adjusting a drilling direction based at least in part on said determination. Combinations of (or selections between) the different measurements may be made based on, inter alia, measurement range, resolution, and contrast. Some disclosed system embodiments include a memory and a processor. The memory stores geosteering display software that configures the processor to generate an image with different regions based on the different types of geosteering measurements. Characteristics such as opacity, resolution, and intensity may visually distinguish the different regions.07-28-2011
20100126774VALVE-CONTROLLED DOWNHOLE MOTOR - The present invention relates to systems and methods for controlling downhole motors. One aspect of the invention provides a valve-controlled downhole motor including: a downhole motor and a spool valve. The downhole motor includes a sealed chamber having a first port and a second port, a stator received within the sealed chamber, and a rotor received within the stator. The spool valve includes a barrel and a spool received within the barrel. The barrel includes an inlet port, an exhaust port, a first feed port, a second feed port, a first return port, and a second return port. The inlet port is located in proximity to the first feed port and second port. The exhaust port is located in proximity to the first return port and the second return port. The spool includes a first gland and a second gland.05-27-2010
20090166089Drilling Tool Steering Device - The invention concerns a drilling tool steering device, characterized in that it contains, consecutively from upstream to downstream, a main body (07-02-2009
20110203851T-Frac System Run in System - A central slant hub tool is provided which is capable of receiving tubing or a tool such as a drill from the surface and directing the tube or tool laterally outward using an exit line slant surface or directing the tube or tool downward to an area below the tool. In this way, the tool acts as a hub to communicate with both lateral branches and lower zones of the main casing. Fracture window tools may be installed in the lateral and lower branches to selectively open the bores for drilling, testing and/or production or may be sealed by a bridge plug or the like when not in use.08-25-2011
20100139981Hole Enlargement Drilling Device and Methods for Using Same - A bottomhole assembly (BHA) coupled to a drill string includes one or more controllers, and a hole enlargement device that selectively enlarges the diameter of the wellbore formed by the drill bit. The hole enlargement device includes an actuation unit that may move extendable cutting elements o the hole enlargement device between a radially extended position and a radially retracted position. The actuation unit may be responsive to a signal that is transmitted from a downhole and/or a surface location. The hole enlargement device may also include one or more position sensors that transmit a position signal indicative of a radial position of the cutting elements. In an illustrative operating mode, one or more operating parameters of the hole enlargement device may be adjusted based on one or more measured parameters. This adjustment may be done in a closed-loop or automated fashion and/or by human personnel.06-10-2010
20100139980BALL PISTON STEERING DEVICES AND METHODS OF USE - The invention provides ball piston steering devices and methods for use of ball piston devices. One aspect of the invention provides a ball piston steering device including: a sleeve in fluid communication with a fluid source and a ball received within the sleeve. The ball is movable within the sleeve from a recessed position and an extended position.06-10-2010
20120067646Apparatus and Method for Lateral Well Drilling - A downhole tool assembly for cutting laterally into an earthen formation from a wellbore. The downhole tool assembly includes a cutting head assembly and a flexible tubular shaft member, wherein the cutting head assembly includes a rotatable nozzle and a cutting head sized and configured to cut laterally into the earthen formation.03-22-2012
20090200082METHODS AND APPARATUS FOR DRILLING DIRECTIONAL WELLS BY PERCUSSION METHOD - The present invention generally relates to methods and apparatus for impact drilling. A drilling tool with a housing and a piston is provided. The drilling tool may be configured to impact while simultaneously rotating a drill head, independent from the rotation of a drill string. The drilling tool may include a rolling key assembly disposed between the housing and the piston that includes a bearing adapted to roll during a first direction of the piston and slide during a second direction of the piston. The drilling tool may include a clutch mechanism configured to rotate the drill head as the piston is directed in the first direction.08-13-2009
20110220417DRILL BITS AND METHODS OF DRILLING CURVED BOREHOLES - The invention provides drill bits and methods of drilling curved boreholes. One aspect of the invention provides a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths. Another aspect of the invention provides a method for drilling a curved borehole. The method includes: providing a drill string including a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths; rotating the drill string; and selectively actuating the one or more blades to a plurality of cut depths; thereby drilling a curved borehole.09-15-2011
20110139512ACTUATORS, ACTUATABLE JOINTS, AND METHODS OF DIRECTIONAL DRILLING - The present invention recites a method and apparatus, wherein said methods and apparatus comprises an actuator comprising a first plate, a pocket extending through the first plate, the pocket in fluid communication with a pressurized fluid source and a second plate coupled to a component that is to be actuated, wherein the first plate, the second plate, and the pocket are dimensioned such that when a pressurized fluid is discharged through the pocket, the velocity of the fluid through a gap between the first plate and the second plate creates a pressure drop sufficient to pull the second plate toward the first plate.06-16-2011
20100147592Mill-Through Tailpipe Liner Exit - A method and apparatus for forming a window in the wall of a tubular wellbore. In one embodiment described herein, a down hole apparatus for forming a window in the wall of a wellbore utilizing a plurality of tubing string sections and a thick tailpipe positioned at the down hole end of a tubing section.06-17-2010
20110139513ECCENTRIC STEERING DEVICE AND METHODS OF DIRECTIONAL DRILLING - The present invention recites a method, system and apparatus for steering a drill string, wherein an eccentric steering device is recited. The eccentric steering device may comprise an eccentric sleeve configured for mounting exterior to a portion of the drill string and permitting the drill string to rotate within the eccentric sleeve and a brake positioned to selectively cause rotation of the eccentric sleeve with the drill string. In one embodiment, the eccentric steering device may further comprise one or more bearings positioned between the eccentric sleeve and the drill string.06-16-2011
20120103693SYSTEM AND METHOD FOR DRILLING A BOREHOLE - A system and method is provided for drilling a wellbore using a rotary drill bit with a bit body having a plurality of mechanical cutters to cut away formation material as the wellbore is formed; and a directed energy mechanism to direct energy into the formation. The energy from the directed energy mechanism is used to enhance the cutting of the mechanical cutters by fracturing surrounding material to facilitate drilling in the direction of the directed energy.05-03-2012
20120031676APPARATUS AND METHOD FOR DIRECTIONAL DRILLING - A directional drilling system and method are provided for directional drilling a borehole by continuous rotating of the drill string in combination with an arrangement of drilling motor assemblies at the lower end of the drill string to effect drilling along a curved path and a substantially straight path. A first drilling motor assembly is coupled to a drill bit and operable to rotate the drill bit to effect drilling of the borehole. A second drilling motor assembly, positioned on the drill string above the first drilling motor assembly, is operable to rotate the first drilling motor assembly in a direction opposite the direction of rotation imparted to the drill string from the surface and to the drill bit by the first drilling motor assembly. A control system associated with the second drilling motor assembly controls fluid flow through the second drilling motor assembly so that the first drilling motor assembly is substantially rotationally stationary with respect to the rotating drill string when drilling a curved path of the borehole.02-09-2012
20100218996DIRECTIONAL SIDETRACK WELL DRILLING SYSTEM - This invention relates to drilling a sidetrack wellbore out of the side of an existing wellbore utilizing a drillable billet having a path formed in the billet to lead a bi-centered drillbit to kick-out from the wellbore and form a sidetrack wellbore. The bi-centered bit is arranged for the lands of the pilot section to follow the path of the billet while the wings of the ream out a portion of the billet and also ream out the earth to form the full dimension sidetrack wellbore. The bi-centered bit is used to drill the sidetrack wellbore to the target zone so that the entire drilling process extends from the existing wellbore to the target zone without a mandatory withdrawal of the drillstring from the wellbore. Tripping time is therefore less and drill time and rig time would inherently be less resulting in lower costs and increased profitability.09-02-2010
20100243328CONTINUOUS GEOMECHANICALLY STABLE WELLBORE TRAJECTORIES - A continuous geomechanically stable trajectory in a subterranean formation is found by calculating at least one reachable stable position relative to a starting position based on geological data indicative of characteristics of the subterranean formation, and iteratively utilizing the calculated reachable stable position as a new starting position. The calculation may be constrained by a boundary including selected distance and direction relative to the starting position, and selected rate of angle change. Within the constraints of the boundary, the possible new trajectories considered may be discretized. The result of the calculations is a three dimensional tree which defines a stability volume. Pruning of at least some branches of the tree may be employed so that not all stable positions have the preselected number of branches, thereby helping to elongate the tree. Either or both of the tree and stability volume are used to select at least one trajectory. For example, the trajectory may be selected from sets of interconnected stable wellbore positions, or based on some other criteria constrained by the stability volume. The trajectory is then used as the basis for drilling a borehole.09-30-2010
20100126775HELICAL CHISEL INSERT FOR ROCK BITS - An insert for an earth boring drill bit, such as a PDC rock bit or a roller cone rock bit, is provided. The insert includes a base integrally joined to a top section, the top section having a first flank that curves in a substantially helical manner about a longitudinal axis of the insert to join a crest.05-27-2010
20090114449ACID TUNNELING BOTTOM HOLE ASSEMBLY AND METHOD UTILIZING REVERSIBLE KNUCKLE JOINTS - A bottom hole assembly connected to coiled tubing to create an acid tunnel in a wellbore formation. High pressure acid is pumped down the coiled tubing and out a nozzle located at the end of the bottom hole assembly. The bottom hole assembly includes a first reversible knuckle joint and a second reversible knuckle joint to properly position the nozzle against the wellbore and to allow the assembly to adjust its angle as it initiates and moves through the lateral tunnel. The two reversible knuckle joints increases the radius of curvature of the bottom hole assembly while providing a sufficient attack angle for the nozzle against the wellbore. The two knuckle joints may be adjusted in response to loads applied on the assembly as the assembly moves through the lateral tunnel.05-07-2009
20100276202METHOD OF DRILLING A WELLBORE - A method of drilling a wellbore (11-04-2010
20110240368BENDING OF A SHAFT OF A STEERABLE BOREHOLE DRILLING TOOL - In certain embodiments, a steerable drilling tool is provided including a rotatable shaft extending through a housing where the shaft and the housing are separated by at least one bearing or two sets of bearings, the shaft having a first portion terminating at a first end of the shaft and a second portion terminating at a second end of the shaft. The steerable drilling tool may further include a drill bit structure operatively coupled to the first portion and a steering subsystem comprising a pair of bearings operatively coupled to the first portion. The steering subsystem may be configured to angulate the shaft by exerting force substantially through the pair of bearings. In certain embodiments, the first portion is between the first end and about one-third of the length of the shaft from the first end towards the second end.10-06-2011
20100133013BIT FOR DRILLING WELLS AND ASSOCIATED DRILLING METHOD - The invention relates to a bit for drilling wells comprising:—a front face,—a plurality of radial blades (06-03-2010
20100133012Apparatus and method for servicing a wellbore - A wellbore servicing apparatus, comprising a first mandrel movable longitudinally along a central axis and rotatable about the central axis, an orienting member configured to selectively interfere with movement of the first mandrel along the central axis, and a second mandrel connected to the first mandrel and configured to rotate about the central axis when the first mandrel rotates about the central axis. A method of orienting a wellbore servicing tool, comprising connecting an orienting tool to the wellbore servicing tool, identifying a predetermined direction, increasing a pressure within the orienting tool, rotating a portion of the orienting tool in response to the increase in pressure within the orienting tool, and rotating the wellbore servicing tool in response to the rotating of the portion of the orienting tool.06-03-2010
20090321138Drill bit having functional articulation to drill boreholes in earth formations in all directions - A drill bit is described herein, having a first bit face with a first plurality of cutters oriented to bore in a first direction, and a second bit face with a second plurality of cutters oriented to bore in one or more second directions. The pluralities of cutters enable functional articulation of the drill bit, such that the drill bit can change direction within a borehole without requiring removal of the drill bit. The drill bit can thereby drill in a downhole direction and lateral directions, can back ream through the borehole, and can provide the borehole with one or more oversized regions, as desired.12-31-2009
20090308659STEERING COMPONENT, STEERING ASSEMBLY AND METHOD OF STEERING A DRILL BIT IN A BOREHOLE - This invention relates to a steering component, to a steering assembly, and to a method of steering a drill bit in a borehole. The steering component is adapted for connection to a drill string, the drill string carrying a drill bit and a motor for rotating the drill bit. The steering component comprises: a rotatable driveshaft adapted for connection between the drill bit and the motor; a drive mechanism; and an offsetting component; the drive mechanism providing a rotatable connection between the drill string and the offsetting component whereby the drill string can rotate relative to the offsetting component. The drive mechanism is adapted to drive the offsetting component to rotate in an opposed direction to the driveshaft, so as to counter the rotation of the offsetting component which is induced by friction within the componentry as the driveshaft rotates. The steering component and method are likely to have their greatest utility in steering a drill bit during drilling for oil and gas.12-17-2009
20110061937WELL CONSTRUCTION USING SMALL LATERALS - This invention relates to the construction of well such as oil and gas wells using techniques based on drilling small lateral wells from a main well. The problem of narrow pressure window is solved by the use of constructions techniques that are based on the use of lateral boreholes, i.e. secondary boreholes that are drilled a main borehole, wherein a method of constructing a well comprises drilling a main borehole extending from the surface through one or more underground formations, drilling a plurality of lateral boreholes extending from the main borehole into surrounding formations, wherein the lateral boreholes are substantially shorter and of smaller diameter than the main borehole; and wherein each lateral borehole is separated from its neighbouring lateral boreholes by a relatively short distance. Drilling of the lateral boreholes can be for to extend 5-60 metres from the main borehole with a diameter in the range 3.8-10 cm by the lateral boreholes at an axial spacing of less than a few metres in the main borehole. Drilling of more than one lateral borehole can be done at the same depth in the main borehole with a trajectory that deviates from the main borehole by less than 10° or with trajectories that extend in a plane that does not contain the main borehole.03-17-2011
20110079437SYSTEM AND METHOD FOR DRILLING AND COMPLETING LATERAL BOREHOLES - A drilling system for drilling and completing a lateral borehole from a main borehole comprises a liner unit for storing one or more prefabricated liners for installation into the lateral borehole; and a drilling unit operable to drill the lateral borehole into the formation surrounding the main borehole and to install the prefabricated liner in the lateral borehole after drilling. A method of drilling a lateral borehole from a main borehole using such a drilling system comprises positioning the system in the main borehole at a location of interest; operating the drilling unit to drill a lateral borehole from the main borehole; completing the lateral borehole by deploying the liner from the liner unit into the lateral borehole.04-07-2011
20110067925FLEXIBLE DIRECTIONAL DRILLING APPARATUS AND RELATED METHODS - A bottom hole assembly to directionally drill a subterranean formation includes a drill bit, a stabilizer assembly located proximate to and behind the drill bit, a drilling assembly comprising a drive mechanism and a directional mechanism, and a flex housing integral with the drilling assembly.03-24-2011
20120118643Piston Devices and Methods of Use - Disclosed herein are, among other things, piston steering devices and methods for use of piston devices. One aspect as disclosed herein provides a ball piston device including: a sleeve in fluid communication with a fluid source and a ball received within the sleeve. The ball is movable within the sleeve from a recessed position and an extended position.05-17-2012
20110031023BOREHOLE DRILLING APPARATUS, SYSTEMS, AND METHODS - Apparatus, systems, and methods may operate to couple a tubular member to a bottom hole assembly, dispose at least one adjustable stabilizing member on the tubular member, and control at least one of a radial extension of the adjustable stabilizing member and an axial position of the adjustable stabilizing member relative to the bottom hole assembly to adjust a borehole trajectory, wherein the adjustable stabilizing member is adjustable in both radial and axial directions. Additional apparatus, systems, and methods are disclosed.02-10-2011
20110031022DIRECTIONAL DRILLING SYSTEM - A directional drilling system comprises a main drill bit 02-10-2011
20090000823Method of Automatically controlling the Trajectory of a Drilled Well - Steering behavior model can include build rate and/or turn rate equations to modal bottom-hole assembly behavior. Build and/or turn rate equations can be calibrated by adjusting model parameters thereof to minimize any variance between actual response 01-01-2009
20110162891Rotating Drilling Tool - Embodiments described herein comprise a system and method for controlling directional drilling. The system includes a conveyance for conveying a bottom hole assembly BHA into a wellbore. The BHA may include a bent housing, a drilling tool and a motor for rotating the bent housing in the wellbore. The system further includes a conveyance rotation device for rotating the conveyance in the opposite direction of the bent housing. The direction of the bent housing may be controlled by controlling the rotational speed of the bent housing and the conveyance while drilling.07-07-2011
20110253453COILED TUBING ORIENTER TOOL WITH DIFFERENTIAL LEAD SCREW DRIVE - A technique facilitates control over the orientation of a bottom hole assembly. The bottom hole assembly comprises an orienting tool having a dual-spline drive which, in turn, comprises a first lead screw portion and a second lead screw portion having threads of a first pitch and a second pitch, respectively. A motor is connected to the dual-spline drive to impart rotational motion with respect to the first threads having the first pitch. A difference in pitch between the first pitch and the second pitch enables the rotational motion imparted by the motor to be converted to a slower, higher torque, output via the second lead screw portion. As a result, the orienting tool is able to provide a selective, high torque, low-speed adjustment to the drilling orientation of the bottom hole assembly.10-20-2011
20110005838HORIZONTAL DIRECTIONAL DRILLING SYSTEM - The invention relates to a horizontal directional drilling system, comprising a dual string (01-13-2011
20080202814Earth-boring tools and cutter assemblies having a cutting element co-sintered with a cone structure, methods of using the same - Methods of forming cutter assemblies for use on earth-boring tools include sintering a cone structure to fuse one or more cutting elements thereto. In some embodiments, one or more green, brown, or fully sintered cutting elements may be positioned on a green or brown cone structure prior to sintering the cone structure to a final density. Cutter assemblies may be formed by such methods, and such cutter assemblies may be used in earth-boring tools such as, for example, earth-boring rotary drill bits and hole openers.08-28-2008
20110162890METHOD AND APPARATUS FOR HYDRAULIC STEERING OF DOWNHOLE ROTARY DRILLING SYSTEMS - A technique is used to control the direction of a drill bit or bottom hole assembly via hydraulic steering utilizing a plurality of steering pads. A portion of hydraulic fluid, e.g. drilling fluid, is directed under pressure to a pad interface region proximate each pad. The hydraulic fluid provides additional force against a surrounding wall and/or reduces or eliminates contact between the pads and the surrounding wall.07-07-2011
20110114388Methods and apparatus for drilling, completing and configuring U-tube boreholes - A borehole network including first and second end surface locations and at least one intermediate surface location interconnected by a subterranean path, and a method for connecting a subterranean path between a first borehole including a directional section and a second borehole including a directional section. A directional drilling component is drilled in at least one of the directional sections to obtain a required proximity between the first and second boreholes. An intersecting component is drilled, utilizing magnetic ranging techniques, from one directional section to provide a borehole intersection between the first and second boreholes, thereby connecting the subterranean path.05-19-2011
20110155468SIDE-TRACKING SYSTEM AND RELATED METHODS - A sidetracking tool includes a setting tool having an expandable anchor, a whipstock connected to an upper end of the setting tool, the whipstock having a ramp face along an axial length thereof, and a drilling assembly including a drill bit disposed on an end thereof, wherein the drill bit is configured to interface with the ramp face of the whipstock.06-30-2011
20090188720System and method for drilling - This disclosure relates in general to a method and system for controlling a drilling system for drilling a borehole in an earth formation. More specifically, but not by way of limitation, embodiments of the present invention provide systems and methods for controlling dynamic interactions between the drilling system for drilling the borehole and an inner surface of the borehole being drilled to steer the drilling system to directionally drill the borehole. In another embodiment of the present invention, data regarding the functioning of the drilling system as it drills the borehole may be sensed and interactions between the drilling system for drilling the borehole and an inner surface of the borehole may be controlled in response to the sensed data to control the drilling system as the borehole is being drilled.07-30-2009
20100025115DIRECTIONAL CONTROL DRILLING SYSTEM - A drilling system, comprising: a non-rotating conveyance system; a tool connected to the non-rotating conveyance system and including anchors by which the tool can be anchored in position when located in a borehole; a drill bit connected to the tool; a motor for rotating the drill bit; and a directional control system interposed between the tool and the drill bit; wherein, in use, with the drilling system located in a borehole, the directional control system can be operates so as to displace the drill bit away from the axis of the borehole.02-04-2010
20100025116STEERABLE ROTARY DIRECTIONAL DRILLING TOOL FOR DRILLING BOREHOLES - The present invention provides a directional drilling apparatus and method for use in drilling bore holes. The apparatus comprises a plurality of movably mounted cutting elements, wherein the cutting elements are movable between radially retracted and extended cutting positions. A rotary valve is provided for synchronizing the movement of the cutting elements between their respective extended and retracted positions. Control of the directional drilling system is affected by synchronized movement of the cutting elements from an inner to an outer radial position in accordance with the angular position of the drill bit. Means are provided for directing high pressure cutting fluid to the region between the cutting elements and the rotatable body to prevent the accumulation of debris that could prevent movement of the cutting elements. The cutting elements enlarge the bore hole formed by the drill bit, so that the cutting elements continuously engage the wall of the bore hole.02-04-2010
20120145462System and Method for Directional Drilling - A system and method facilitate directional drilling. The technique employs an orienting tool which may be connected into a coiled tubing drilling system to selectively orient a drilling assembly. The orienting tool is able to cause relative rotation of an outer housing to orientate a tool face. The relative rotation is facilitated by utilizing floating members, such as a floating piston and a floating nut, in the internal orientation assembly. The floating member or members are decoupled in a radial direction to better facilitate the relative rotation of the housing with respect to components of the internal orientation assembly.06-14-2012
20120031678METHOD OF FORMING A BORE - A method of forming a supported subterranean well bore in which, in one disclosed embodiment, a first drill bit is mounted on a first string of casing tubulars via a steerable tool, and the drill bit is used to form a first bore. Upon reaching the required depth the casing string is cemented in place to support the formed bore and a second drill bit is mounted on a second casing string and is inserted into the first casing string. The second drill bit is used to drill through the wall of the first casing string and proceed to form a second, deeper bore. Once the second drill bit has reached the required depth, the second casing string is cemented in place to support the second bore.02-09-2012
20120037428SYSTEM AND METHOD FOR DRILLING A DEVIATED WELLBORE - A system and method for drilling a wellbore along a desired well path is disclosed. The system and method employed a bearing housing which may be connected into a bottom hole assembly to facilitate drilling of deviated wellbore sections. The bearing housing has an internal bore with an axis that can be positioned to form a non-zero angle with the central or longitudinal axis of the bearing housing. The internal bore is designed to rotatably receive a drill bit shaft such that a drill bit is oriented at a desired angle with respect to the bearing housing. Alternatively, the internal bore may be positioned in a sleeve which is received in the bearing housing.02-16-2012
20090095533SELF-CONTAINED SYSTEM FOR DRILLING A DRAINHOLE - A self-contained system for drilling a drainhole laterally to a wellbore that includes a drill head with a tool for boring a drainhole and a self-propelled device for advancing the head into the drainhole during boring; a relay unit lowered into the wellbore, arranged to position the drill head against the sidewall of the wellbore in order to initiate the boring of the drainhole laterally to the wellbore; a cable for supplying electric power to the drill head, reeled out from the relay unit; and a mechanical system for removing cuttings from the drainhole during boring, the debris removed falling downhole.04-16-2009
20120000709DIRECTIONAL DRILLING CONTROL USING PERIODIC PERTURBATION OF THE DRILL BIT - Disclosed herein is a system for steering the direction of a borehole advanced by cutting action of a rotary drill bit by periodically varying action of a drill bit while continuously rotating a drill string to which the drill bit is operationally attached. The steering system can include a bit perturbation device cooperating with a bent housing subsection and operationally connected to the drill string and to the drill bit. Drill bit action can be varied by periodically varying the rotation speed and/or rate of penetration of the drill bit. Periodic drill bit action results in preferential cutting of material from a predetermined arc of the borehole wall which, in turn, results in borehole deviation. Action of the drill bit can be varied independently of the rotation rate of the drill string.01-05-2012
20100126776Subsea Drilling With Casing - A method of forming a wellbore includes providing a drilling assembly comprising one or more lengths of casing and an axially retracting assembly having a first tubular; a second tubular at least partially disposed in the first tubular and axially fixed thereto; and a support member disposed in the second tubular and movable from a first axial position to a second axial position relative to the second tubular, wherein, in the first axial position, the support member maintains the second tubular axially fixed to the first tubular, and in the second axial position, allows the second tubular to move relative to the first tubular; and an earth removal member disposed below the axially retracting assembly. The method also includes rotating the earth removal member to form the wellbore; moving the support member to the second axial position; and reducing a length of the axially retracting assembly.05-27-2010
20110155467TIMED IMPACT DRILL BIT STEERING - A method of steering a drill bit while drilling a wellbore can include periodically delivering an impact to the drill bit as the drill bit is rotated by a drill string. The impact may be delivered to the drill bit when an axis of the drill bit is oriented in a desired azimuthal direction relative to an axis of the drill string. Another method of steering a drill bit while drilling a wellbore may include interconnecting a bend in a drill string between an impact tool and the drill bit, and periodically delivering an impact from the impact tool to the drill bit as the drill bit is rotated by the drill string. A directional drilling system can include a drill string having a bend interconnected therein, an impact tool, and a drill bit, the bend being interconnected in the drill string between the drill bit and the impact tool.06-30-2011
20110155466VARIED RPM DRILL BIT STEERING - A method of steering a drill bit while drilling a wellbore can include periodically increasing a rotational speed of the drill bit while drilling the wellbore, with the rotational speed being increased when an axis of the drill bit is oriented in a desired azimuthal direction relative to a drill string axis. A directional drilling system can include a drill string having a bend interconnected therein, a drill bit, and a controller which selectively increases a rotational speed of the drill bit when an axis of the drill bit is oriented in a desired azimuthal direction relative to an axis of the drill string above the bend. Another method of steering a drill bit while drilling a wellbore can include interconnecting a brake in a drill string, and periodically decreasing a braking force of the brake as the drill bit is rotated.06-30-2011
20110079438DRILL BITS AND TOOLS FOR SUBTERRANEAN DRILLING, METHODS OF MANUFACTURING SUCH DRILL BITS AND TOOLS AND METHODS OF DIRECTIONAL AND OFF CENTER DRILLING - A drill bit may include a bit body including at least one blade extending at least partially over a cone region of the bit body. Additionally, the drill bit may include a plurality of cutting structures mounted to the at least one blade and a rubbing zone within the cone region of the at least one blade, wherein cutting structures within the rubbing zone have a reduced average exposure. Additionally, a method of directional drilling may include positioning a depth-of-cut controlling feature of a drill bit away from a formation to prevent substantial contact between the depth-of-cut controlling feature and rotating the drill bit off-center to form a substantially straight borehole segment. The method may also include positioning the depth-of-cut controlling feature of the drill bit into contact with the formation to control the depth-of-cut and rotating the drill bit on-center to form a substantially nonlinear borehole segment.04-07-2011
20120205159RECEIVING LATERAL WELLBORE AND METHOD FOR IMPLANTING SAME - The present invention relates to an innovative wellbore concept, which gives experts a new alternative enabling them to analyse the economic viability of a deposit. The new structural arrangement for oil wells involves the utilisation of equipment that is already available at the wells (of dry or wet completion), and the exploitation of a remote neighbouring field by mechanical and hydraulic interconnection. The implementation method uses already known drilling tools and techniques, but renders their applicability advantageous, since it ensures production from deposits or wells that are not considered viable, by using resources that are already available and in operation.08-16-2012
20120067647Apparatus and Method for Lateral Well Drilling - A downhole tool assembly for cutting laterally into an earthen formation from a wellbore. The downhole tool assembly includes a cutting head assembly and a flexible tubular member, wherein the cutting head assembly includes a rotatable nozzle and a cutting head sized and configured to cut laterally into the earthen formation. The downhole tool assembly may be guided through a channel defined by a guide assembly and positioned such that the cutting head is proximate the portion of the earthen formation to be laterally cut. A rotational source may be operatively connected and in fluid communication with the conduit and flexible tubular member, whereby torque generated by the rotational source is translated by the flexible tubular member to the cutting head, causing the cutting head to rotate and cut the earthen formation.03-22-2012
20120012394Air Percussion Drilling In Horizontal Wells - A method of drilling a subterranean formation includes positioning a drill string in a well bore in the subterranean formation. The drill string includes a hammer bit, a bend in a housing of the drill string, and a guidance system that determines inclination and azimuth of at least a portion of the drill string in the well bore. Once positioned in the well bore, the hammer bit is caused to repeatedly strike the end of the well bore while rotating about an axis of the hammer bit thereby drilling the subterranean formation and forming a new length of the well bore in the subterranean formation. The orientation of the bend of the drill string in the well bore is controlled based on the determined inclination and azimuth such that the hammer bit drills the new length of the well bore substantially horizontally in the subterranean formation.01-19-2012
20120111636COMBINATION WHIPSTOCK AND COMPLETION DEFLECTOR - Assemblies can be disposed in a subterranean bore. An assembly can include a surface that can divert a cutting tool for creating a branch wellbore and that can divert a completion component for completing the branch wellbore without requiring the assembly or part of the assembly from being removed from a parent wellbore prior to the completion component being diverted.05-10-2012
20110088951DUAL BHA DRILLING SYSTEM - The invention relates to apparatus and methods useful for drilling lateral boreholes into a formation surrounding a main borehole. Proposed technique can be used for drilling of laterals which does not require such significant interruptions to deploy the small BHA and is based on the use of a drilling apparatus, comprising a drill collar forming part of a primary drilling assembly and having an outward opening groove in the side thereof, a secondary drilling assembly, comprising a tubular drill string connected at one end to the drill collar, a drilling motor mounted in the drill string, a drill bit mounted at the other end of the drill string and connected to the drilling motor, wherein the secondary drilling assembly is mounted in the drill collar so as to be movable between a first position in which the drill bit is seated in the groove, and a second position in which the bit projects laterally from the groove in the side of the drill collar.04-21-2011
20120160563SYSTEM AND METHOD FOR CONTROLLING STEERING IN A ROTARY STEERABLE SYSTEM - A system and methodology provide improved control over the directional drilling of a wellbore. A rotational valve is mounted within a drill collar of a rotary steerable system to enable selective actuation of one or more steering pads on the drill collar via an actuating fluid. The rotational valve is controlled via a motor and designed to provide enhanced control over the flow of actuating fluid to the steering pads.06-28-2012
20120160565SYSTEM AND METHOD TO CONTROL STEERING AND ADDITIONAL FUNCTIONALITY IN A ROTARY STEERABLE SYSTEM - A system and methodology provide improved control over the directional drilling of a wellbore while enabling additional functionality. A rotational valve is mounted within a drill collar of a rotary steerable system to control flow of actuating fluid to one or more steering pads which are selectively moved in a lateral direction with respect to the rotary steerable system. The rotational valve also is controlled to carry out at least one additional function while controlling the direction of drilling.06-28-2012
20120160564SYSTEM AND METHOD EMPLOYING A ROTATIONAL VALVE TO CONTROL STEERING IN A ROTARY STEERABLE SYSTEM - A system and methodology provide improved control over the directional drilling of a wellbore. A rotational valve is mounted within a drill collar of a rotary steerable system to control flow of actuating fluid to one or more steering pads which are selectively moved in a lateral direction with respect to the rotary steerable system. The rotational valve is designed to provide enhanced control over the flow of actuating fluid to the steering pads to facilitate drilling of straight sections of wellbore and deviated or non-linear sections wellbore.06-28-2012
20100270079Rotary directional drilling apparatus and method of use - An apparatus for steering a drill string that includes at least one blade fixedly disposed on an exterior surface of the drill string, such that the at least one blade is rotatable about the drill string in response to fluid flow through a fluid passage in association with said at least one blade, and the at least one blade rotates independent of the drill string for imparting an asymmetrical moment to the drill string in a selected direction for orienting a drill bit attached to the drill string, thereby steering the drill string.10-28-2010
20100000794Lead the Bit Rotary Steerable Tool - In one aspect of the present invention, a drilling assembly comprises a drill bit comprising a bit body intermediate a working face and a shank. An indenting member adapted to guide the drill bit protrudes from the working face. A flexible portion is disposed above the bit body.01-07-2010
20120222902HIGH PERFORMANCE WELLBORE DEPARTURE AND DRILLING SYSTEM - A system and method facilitate drilling of lateral wellbores by optionally eliminating one or more trips downhole. The system and method provide for drilling a lateral wellbore by enabling the milling of a casing window and the drilling of the desired lateral wellbore to a target depth during a single trip down hole. The system and method also facilitate better downhole dynamics control and improved overall bottom hole assembly functionality during drilling.09-06-2012
20120255787Method for Hydrocarbon Well Completion - A method of completing a hydrocarbon lateral well in a target shale formation. The method uses a data log generated from an optical flow cell assembly to identify areas in the lateral well of high free gas porosity. By evaluating such data, an operator can group “like” rock, determine stage length and variation in stage length, and determine perforation cluster spacing and location. The flow cell assembly can also be used in a completion program to assist in the steering of a lateral well being drilled below the target formation.10-11-2012
20120255788Drill Bit with Hydraulically Adjustable Axial Pad for Controlling Torsional Fluctuations - In one aspect, a drill bit is disclosed that, in one configuration, includes one or more cutters on a surface thereon configured to penetrate into a formation, at least one pad at the surface, an actuation device configured to supply a fluid under pressure to the pad to extend the pad from the surface, and a relief device configured to drain fluid supplied to the pad to reduce the pressure on the at least one pad when the force applied on the at least one pad exceeds a selected limit.10-11-2012
20120228031RAM BORING DEVICE - The invention relates to a ram boring device for creating horizontal boreholes, having an impact piston which moves in an oscillatory manner within a casing of the ram boring device and of which the impact frequency or impact intensity can be varied by displacing the center position of the impact piston inside the casing.09-13-2012
20090065258METHOD AND APPARATUS FOR DIRECTIONAL DRILLING WITH VARIABLE DRILL STRING ROTATION - Apparatus and methodology is provided for directional drilling which avoid the effects of static friction between the drill string and the borehole. The drill string is rotated continuously in one direction during rotating drilling and during steering. During steering, the rotary speed of the drill string is varied within a revolution and substantially similarly for each of a plurality of subsequent revolutions. The drill string is be rotated very slowly when oriented at or near the desired orientation to achieve the desired change in direction and then rotated much faster during the balance of each revolution. This angular velocity profile results in drilling at or near a desired orientation for a high percentage of the time it takes for each revolution. Changes in an effective tool-face orientation can be effected by shifting the phase of the velocity profile.03-12-2009
20120261193SYSTEM AND METHOD FOR COUPLING AN IMPREGNATED DRILL BIT TO A WHIPSTOCK - A system and method to facilitate the drilling of one or more lateral wellbores while eliminating one or more trips downhole. The system utilizes a drilling assembly comprising an impregnated drill bit or other suitable drill bit. The impregnated drill bit is coupled to a whipstock by a connector for deployment downhole in a single trip. The connector comprises a separation device which facilitates disconnection of the impregnated drill bit from the whipstock once the whipstock is anchored at a desired downhole location.10-18-2012
20110036632CONTROL SYSTEMS AND METHODS FOR DIRECTIONAL DRILLING UTILIZING THE SAME - Aspects of the invention provide control systems and methods for directional drilling. One aspect of the invention provides a system for controlling a first module, a second module, and a third module. The system includes: an inlet configured to receive fluid from a fluid source; a first double-stage valve; and a second double-stage valve. The first double-stage valve is actuatable to a first position wherein fluid from the inlet flows through the first double-stage valve to the second double-stage valve and a second position wherein fluid from the inlet flows through the first double-stage valve to the third module. The second double-stage valve is actuatable to a first position wherein fluid flows from the first double-stage valve to the first module and a second position wherein fluid flows from the first double-stage valve to the second module.02-17-2011
20120267171Well System With Lateral Main Bore and Strategically Disposed Lateral Bores and Method of Forming - A wellbore system and a method of forming the wellbore system, where the wellbore system is made up of a primary wellbore that is disposed entirely above a producing zone and lateral wellbores that extend from the primary wellbore into the producing zone. By penetrating the producing, or target, zone with the lateral wellbores, fractures in the target zone can be better avoided thereby increasing the potential amount of recoverable hydrocarbon. Optionally, wellbore systems are included that have more than a single primary wellbore. Further disclosed is a method of maximizing wellbore production by selectively blocking designated lateral wellbores in which water or other non-hydrocarbon fluid is detected.10-25-2012
20120080235SYSTEM AND METHOD FOR DIRECTIONALLY DRILLING A BOREHOLE WITH A ROTARY DRILLING SYSTEM - This disclosure relates in general to a method and a system for directionally drilling a borehole with a rotary drilling system. More specifically, but not by way of limitation, methods and system provide for controlling motion of the rotary drilling system in the borehole when a side force is applied to the drilling system to bias or focus the motion so that the drilling system directionally drills the borehole through an earth formation. In certain aspects, side cutting of a sidewall of the borehole by a drill bit under an applied side force is controlled by a geostationary element to provide for directional side cutting and, as a result, directional drilling of the borehole through the earth formation. In other aspects, a non-concentrically coupled gauge pad assembly may rotate with the drilling system and bias or focus the applied side force.04-05-2012
20120080234Drill Bit Steering Assembly - In one aspect of the present invention, a steering assembly for downhole directional drilling comprises an outer bit comprising a bore and an outer cutting area and in inner bit comprising an inner cutting area and connected to a shaft that is disposed within the bore. At least one biasing mechanism is disposed around the shaft. At least one fluid channel is disposed within the outer bit and redirects fluid to the at least one biasing mechanism causing the at least one biasing mechanism to push the shaft and alter an axis of the inner bit with respect to an axis of the outer bit.04-05-2012
20120080233Steering Mechanism with a Ring Disposed about an Outer Diameter of a Drill Bit - In one aspect of the present invention, a steering assembly for downhole directional drilling comprises a drill bit comprising a cutting portion and an outer diameter. A steering ring disposed around the outer diameter, and at least one biasing mechanism disposed intermediate the outer diameter and the steering ring. The at least one biasing mechanism is configured to move the steering ring with respect to the outer diameter.04-05-2012
20100224415Methods and apparatus for drilling, completing and configuring U-tube boreholes - A borehole network including first and second end surface locations and at least one intermediate surface location interconnected by a subterranean path, and a method for connecting a subterranean path between a first borehole including a directional section and a second borehole including a directional section. A directional drilling component is drilled in at least one of the directional sections to obtain a required proximity between the first and second boreholes. An intersecting component is drilled, utilizing magnetic ranging techniques, from one directional section to provide a borehole intersection between the first and second boreholes, thereby connecting the subterranean path.09-09-2010
20120318582MULTILATERAL SYSTEM WITH RAPIDTRIP INTERVENTION SLEEVE AND TECHNIQUE FOR USE IN A WELL - A method for constructing a multilateral well includes drilling a main well, drilling a first lateral well from the main well, installing a production reentry deflection tool in the main well, proximate the first lateral, the first production reentry deflection tool having a first inner diameter, drilling a second lateral well from the main well and above the first lateral well, and installing a second production reentry deflection tool in the main well, proximate the second lateral, the second production reentry deflection tool having a second inner diameter. The first inner diameter is smaller than the second inner diameter.12-20-2012
20120090897Stochastic Bit Noise - A drill bit direction system and method is disclosed that modifies or biases the stochastic movement of the drill bit and/or stochastic interactions between the drill bit and an inner-wall of a borehole being drilled by a drilling system to change the direction of drilling of the drilling system. The direction of the drill bit is monitored to determine if the direction happens to align in some way with a preferred direction. If the direction isn't close enough to a preferred direction, a biasing mechanism modifies the stochastic movement in an attempt to modify the direction closer to the preferred direction. Any of a number of biasing mechanisms can be used. Some embodiments can resort to conventional steering mechanisms to supplement the biasing mechanism.04-19-2012
20080271925Acid tunneling bottom hole assembly - A bottom hole assembly connected to coiled tubing to create an acid tunnel in a wellbore formation. High pressure acid is pumped down the coiled tubing and out a nozzle located at the end of the bottom hole assembly. The bottom hole assembly includes a first knuckle joint and a second knuckle joint to properly position the nozzle against the wellbore. The two knuckle joints increases the radius of curvature of the bottom hole assembly while providing a sufficient attack angle for the nozzle against the wellbore. The two knuckle joints also may reduce the chance that the nozzle will cam lock within the acid tunnel. The two knuckle joints may be oriented such that they bend within the same plane. The nozzle may be connected onto the end of wand having a telescoping portion. The nozzle may be adapted to form an elliptical acid tunnel.11-06-2008
20080223617Deviated Drilling Method for Water Production - Method for drilling horizontal or deviated fresh water wells through such volcanics as occur in Hawaii, including hard lavas and fragmented interbeds that are prone to caving. The method provides effective means to drill into basal aquifers directly underlain by salt water, or into compartmented or confined aquifers or perched aquifers. The method uses deviated drilling and may use formation grouting, casing or drill-stem drilling, percussion or rotary drilling and all combinations thereof.09-18-2008
20130168152Apparatus for Directional Drilling - A downhole drilling apparatus includes an assembly having a longitudinal axis, wherein an output shaft of the assembly extends axially through a housing. A bearing assembly has first and second races, wherein a first set of bearing elements are disposed at a first angle relative to a top surface of the first race and a second set of bearing elements are disposed at a second angle relative to a top surface of the second race. The output shaft extends from an outlet of the housing at the angle defined by the bore.07-04-2013
20130168151SYSTEM AND METHOD TO FACILITATE THE DRILLING OF A DEVIATED BOREHOLE - A system and method for facilitating the drilling of a deviated borehole. The system and method employ a flexible conveyance. A hydraulic actuation assembly is coupled to the flexible conveyance and a whipstock is releasably coupled to the hydraulic actuation assembly. The whipstock and hydraulic actuation assembly are conveyed downhole in the wellbore. The hydraulic actuation assembly provides a hydraulic fluid under pressure to anchor the whipstock.07-04-2013
20130112483Oil Operated Rotary Steerable System - A technique facilitates steering of rotary steerable systems when conducting directional drilling operations. A rotary steerable system is combined with a pressurized oil system which delivers oil to a piston actuated mechanism. The pressurized oil provides precise, long-lasting control over the orientation of the bottom hole assembly and the drill bit to facilitate directional drilling of boreholes through subterranean formations.05-09-2013
20090321137Drill bit having no gage pads and having the ability to drill vertically and laterally - A drill bit having a plurality of cutters on its lower surface, each of which can having a plurality of PDC cutter elements disposed thereon. The cutting surface on each of the cutters is mounted in in an orientation that allows drilling of oversize boreholes which enables the drill bit to be turned more easily to facilitate the boreholes being drilled on a smaller radius. The placement of the cutters on each of the blades enables the drill bit to drill both vertically and laterally.12-31-2009
20130146362Oil and Gas Enhancement System - Radial Drilling Method - The invention being designed in this application relates to a radial drilling method. Boreholes are placed into oil and gas formations to provide openings for the removal of the product.06-13-2013
20100282517BORING SYSTEM - The invention relates to a system for the overground operation of underground sewer tools, especially of expander and pulling heads comprising a rod assembly that is rigid when pushed and a supporting device absorbing shear or tractive forces.11-11-2010
20100300758METHODS AND SYSTEMS FOR DESIGNING AND/OR SELECTING DRILLING EQUIPMENT USING PREDICTIONS OF ROTARY DRILL BIT WALK - Methods and systems may be provided simulating forming a wide variety of directional wellbores including wellbores with variable tilt rates and/or relatively constant tilt rates. The methods and systems may also be used to simulate forming a wellbore in subterranean formations having a combination of soft, medium and hard formation materials, multiple layers of formation materials and relatively hard stringers disposed throughout one or more layers of formation material. Values of bit walk rate from such simulations may be used to design and/or select drilling equipment for use in forming a directional wellbore.12-02-2010
20100307830METHOD AND SYSTEM FOR PARTICLE JET BORING - The present invention provides a method and system for the generation of, the utilization of, the processing of, and the maintenance of a heterogeneous solid-particle impactor-laden fluidic-process circuit that incorporates a particle-injector system and a fluidic-amplifier jet head to produce a conical-shaped cutting jet of fluid and solid-particle impactors that perform functions during the boring, well-bore conditioning, and/or controlling the inclination and azimuth of deep subterranean well bores during their construction.12-09-2010
20110315450COILED TUBING ORIENTER TOOL WITH HIGH TORQUE PLANETARY GEAR STAGE DESIGN DRIVE - A technique facilitates control over the orientation of a bottom hole assembly. A planetary gearbox assembly incorporates a sun wheel which cooperates with planet wheels at a plurality of levels along the planetary gear box assembly. The sun wheel and the planet wheels cooperate to convert rotational input to rotational output through an output carrier. Torsional rigidity characteristics of the sun wheel and the output carrier are selected to distribute torque loading across the plurality of levels of the planetary gear box assembly. The distributed forces reduce the potential for component failure.12-29-2011
20120018225TILTED BIT ROTARY STEERABLE DRILLING SYSTEM - A wellbore is formed by using an apparatus that may include a shaft having an end portion, a drill bit body tiltable about the end portion, and at least one actuator configured to apply a tilting force to the drill bit body.01-26-2012
20120018224COMPLIANTLY COUPLED GAUGE PAD SYSTEM - A drill bit system for a drilling assembly is disclosed. The drill bit system may include a chassis, a head, and one or more compliantly coupled gauge pads. The head may include a first plurality of cutters coupled with an end of the head, and the head may be coupled with chassis. The one or more gauge pads may include a second plurality of cutters, and the one or more gauge pads may be movably coupled with the chassis.01-26-2012
20130192898HYDRAULIC BRAKE FOR DRILLING-BIT - Method for blocking/braking at least one conical inlet wheel of a drilling-bit of a drilling tool, said method consisting in using at least one toothed wheel (08-01-2013
20120024606SYSTEM AND METHOD FOR DIRECTION DRILLING - A system and a method for directional drilling may generate a model of steering behavior which may be used to estimate a position and an orientation of the drill bit during directional drilling. The estimated position and the estimated orientation may be compared to the well plan to determine desired drilling behavior, and the desired drilling behavior may be used to determine a recommended toolface orientation and/or recommended intervals of sliding and rotating to conform the directional drilling to the well plan.02-02-2012
20130199850Drill bits and methods for forming curved portions of a borehole - Drill bits and methods for forming a curved portion of a borehole include a first plurality of cutting elements, such as tungsten carbide inserts, positioned at the outer or perimeter region of a bit face and oriented to bore in a direction generally perpendicular to the bit face. A second plurality of cutting elements, such as polycrystalline diamond compact cutters, are positioned at the inner region of the bit face and oriented to bore in a direction generally parallel to the bit face. When forming a curved portion of a borehole, the first plurality of cutting elements engage the formation to allow the drill bit to reorient at sharper angles than conventional methods for forming a curve, while when forming a linear portion of a borehole, the second plurality of cutting elements engage the formation to provide stability to the drill bit and a rapid rate of penetration.08-08-2013

Patent applications in class Boring curved or redirected bores