| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166067000 | WITH BELOW AND ABOVE GROUND MODIFICATION | 49 |
| 20090014167 | Dual Point Adjustable Depth Air Sparging Well System - An adjustable depth air sparging well system having a fixed depth or secondary air injection point and an adjustable depth or primary air injection point for injecting compressed air into saturated or groundwater regions of the soil's subsurface to remove volatile contaminants from the soil's subsurface. At least one flow-through air sparge packer which is slidably mounted within the well casing of the air sparging well system allows a user to adjust the depth at which the adjustable depth air injection point is set. The flow through air sparge packer is available in one, two and one half and five foot lengths. | 01-15-2009 |
| 20090260799 | Multiple Point Adjustable Depth Air Sparging Well System - An multiple point adjustable depth air sparging well system having a multiple air injection points for injecting compressed air into saturated or groundwater regions of the soil's subsurface to remove volatile contaminants from the soil's subsurface. At plurality of flow-through air sparge packer which are slidably mounted flow-through packers within the well casing of the air sparging well system allows a user to adjust the depths of the air injection points. Each packer has attached thereto a pressure regulator which provides compressed air to one of the multiple air injection points. | 10-22-2009 |
| 20110232894 | ARTIFICIAL OIL LIFTING UNIT USING ABSORBENT BELTS - An artificial oil lifting unit uses an endless olephilic absorbent belt, driven by a surface equipment and tensed by a down hole equipment placed in the well production casing. The said absorbent belt ( | 09-29-2011 |
| 20110247798 | TUBING HANGER RUNNING TOOL WITH INTEGRATED PRESSURE RELEASE VALVE - A system, in certain embodiments, includes a subsurface safety valve (SSV) biased toward a closed position, and configured to open by application of hydraulic pressure. The system also includes a tubing hanger running tool (THRT), including a conduit in fluid communication with the SSV, and a pressure release valve fluidly coupled to the conduit. The pressure release valve is configured to maintain sufficient hydraulic pressure within the conduit to hold the SSV in an open position while the pressure release valve is in a closed position. | 10-13-2011 |
| 20090032239 | Marginal Oil Extraction Device - A marginal oil extraction system having an upper extraction unit, an extraction container, and a lower valve assembly. The marginal oil extraction system uses at least some of these components to cheaply extract oil from a stripper oil well. In some cases the system is capable of separating the oil from the water in the well with a solid barrier and can cheaply remove the oil from above the solid barrier. The system is cheap to install, easy to maintain and provides efficient access to what would otherwise be an inaccessible asset. | 02-05-2009 |
| 166068000 | Eduction pump or plunger in well | 23 |
| 20130025846 | DOWNHOLE GAS RELEASE APPARATUS - The present invention provides for an apparatus for use with a traveling valve assembly of a downhole pump for releasing gas and thereby breaking gas locks. The apparatus comprises a piston slidably disposed within a cylindrical housing, the piston being driven by an attached plunger element. On the down stroke of the pump, the piston protrudes through end of the cylindrical housing engaging and opening the adjacent valve. On the up stroke of the pump, the piston retracts into the cylindrical housing, disengaging from the valve allowing it to close. Fluid flows along the outer surface of the apparatus by means of fluid ports connected by defined fluid passages. | 01-31-2013 |
| 20130126155 | Methods and Apparatus for Removing Liquid from a Gas Producing Well - A method for pumping fluid at a wellhead is provided. The invented method will improve liquid removal by eliminating the need to transport liquid produced from a well to containment facilities using trucks or large diameter pipelines capable of accommodating periodic surges of a high volume of fluid. The danger that the liquid will freeze in cold weather is also addressed. The invention removes liquid from the well site through a small diameter pipeline as a continuous flow at a constant flow rate. An apparatus for removing liquid from the well site is also provided. | 05-23-2013 |
| 20090126924 | FLUSH-BY SYSTEM - A flushing apparatus for flushing a downhole pump having a rotor and a stator includes a lifting device forming part of a wellhead assembly. The lifting device is attached to the rotor, such that when activated, the lifting device applies a lifting force to lift the rotor out of the stator. There is a fluid connection on the wellhead assembly for flushing fluid through the stator once the rotor has been removed from the stator. | 05-21-2009 |
| 20110297367 | MANUAL EMERGENCY WATER PUMP SYSTEM - The invention is generally directed to the novel and unique water pump system that is for manual operation, such as when there is a power failure and electrical pump systems are inoperable. An expansion tank is connected to the first end of a water conduit, which runs from below the static water level of the water to the expansion tank. A static chamber is disposed in the well and below the static water level. An air line conduit is fluidly connected to the top portion of the static chamber with the opposing end of the air line conduit being an air input port. When air is delivered into the air input port of the air line conduit, the air pushes water residing in the static chamber and water conduit up through the main water line and into an optional expansion tank for use. | 12-08-2011 |
| 20110284204 | WAFER STUFFING BOX - A low-profile wafer stuffing box includes a plurality of replaceable seals located within a single, unitary body. The body includes a central bore with a plurality of internal channels, a first internal channel located proximate a top surface of the body, a second internal channel located proximate a bottom surface of the body, and a third internal channel being located between the first internal channel and the second internal channel. An internal fluid corridor extends from the front wall through the stuffing box body and into the third internal channel. The low-profile wafer stuffing box may be used on reciprocating piston pumps. | 11-24-2011 |
| 20110284205 | STRESS AND TORQUE REDUCING TOOL - A stress and torque reducing tool has a plunger that reciprocates inside of a body. The tool is connected between the pump and the sucker rod string and reduces stress transmitted therebetween. The body and plunger have longitudinally extending surfaces located at the plunger upper end portion, which surfaces cooperate and limit rotation of the body with respect to the plunger. An upper fluid port is located in an upper end of the body, while one or more lower fluid ports are located in a lower end of the body. | 11-24-2011 |
| 20120152520 | EMERGENCY WATER PUMP SYSTEM - The invention is generally directed to the novel and unique water pump system that is for manual operation, such as when there is a power failure and electrical pump systems are inoperable. When air is delivered into the air input port of the air line conduit, the air pushes water residing in the static chamber and water conduit up through the main water line and into an optional expansion tank for use. An electrical air compressor may be used to deliver the air. The water pump system may be provided in a parallel configuration for continuous operation and also in a stacked series configuration for deep well environments. | 06-21-2012 |
| 20100032152 | WELL JET DEVICE - A jet pump mounted on a pipe string and a packer, and a through channel with a sealing unit having a logging cable channel is in the pump body. A check valve is in a channel, for supplying a medium pumped out from a well, at the input thereof in the lower body. A guiding bush with a movable rod, arranged parallel to the logging cable, is fixed to the body under the valve. The top of the rod is positioned under the check valve closing element and a fork, over which the logging cable passes, fastens to the lower end of the rod. The closing element can be pressed out from a seat and brought into contact with the fork while a downhole instrument is lifted. The invention extends functionality by isolating pipe string spaces above and under the jet pump when the instrument is below the pump. | 02-11-2010 |
| 20090008080 | STRESS AND TORQUE REDUCING TOOL - A stress and torque reducing tool has a plunger that reciprocates inside of a body. The tool is connected between the pump and the sucker rod string and reduces stress transmitted therebetween. The body and plunger have longitudinally extending surfaces located at the plunger upper end portion, which surfaces cooperate and limit rotation of the body with respect to the plunger. An upper fluid port is located in an upper end of the body, while one or more lower fluid ports are located in a lower end of the body. The tool is exceptionally strong and is less likely to fail. | 01-08-2009 |
| 20110094730 | Bottom Tag for Progressing Cavity Pump Rotor with Coiled Tubing Access - The bottom tag of the present invention comprises a tapered coupling that is secured below the stator housing. In one embodiment the smaller diameter of the coupling is smaller than the rotor minor diameter. In another embodiment the smallest diameter in the coupling tag is smaller than the major diameter of the rotor and longer than one half the rotor pitch, so that no more than one half of a rotor pitch can enter. In either case there are optional side openings to aid flow during operation. The taper in the coupling tag guides coiled tubing through when the rotor is removed to clean up the wellbore below by jetting through the coiled tubing. The taper can also guide measurement equipment through. | 04-28-2011 |
| 20120018141 | WELL TOOL HAVING A NANOPARTICLE REINFORCED METALLIC COATING - A well tool is disclosed. The tool includes a first member having a surface that is configured for exposure to a well fluid, the first member comprising a metallic coating disposed on a substrate, the metallic coating having a plurality of dispersed nanoparticles disposed therein and providing the surface. The tool also includes a second member that is disposed in slidable engagement on the surface of the first member. In another exemplary embodiment, a well tool includes a first member having a surface that is configured for exposure to a well fluid, the first member comprising a metallic alloy, the metallic alloy having a plurality of dispersed nanoparticles disposed therein and providing the surface. | 01-26-2012 |
| 20120211218 | BORONIZED PLUNGER - A plunger for use in oil and gas production wells. The plunger may be formed of an elongate body configured to be received in a well tubing. The plunger may be formed of a base material, such as a suitable steel material. The plunger may have a hardened exterior surface formed by boronizing the plunger. The plunger may have improved wear and friction characteristics. | 08-23-2012 |
| 20080314578 | Downhole jet pump - One embodiment of a downhole jet pump | 12-25-2008 |
| 20100230090 | Low Cost Rigless Intervention and Production System - A system which may be used to replace workover rigs and metallic pipes for the production of hydrocarbon from wellbores uses a non-metallic, substantially continuous, flexible tube comprising a flexible, non-metallic, e.g. resin-based, substantially continuous production tube that can be wellbore deployed and retrieved without the need of onsite rigs. The system's components can be placed inside existing pipes for work in old wells where removal of the existing tube is not economical. The tubes may also be spoolable, thereby increasing installation rates and flexibility. Connectors for the tube may be dimensioned and configured to allow for providing and/or sealing downhole tools to the production tube. In certain embodiments, an onsite power generator will provide a clean alternative to existing diesel burning generators and will typically use a furnace, boiler, steam engine and electrical power generator. | 09-16-2010 |
| 166680500 | With above ground (1) motor carried by casing or casing support or (2) well fluid pump | 9 |
| 20090266534 | ARRANGEMENT USED IN OIL FIELD WELLS FOR LIFTING HYDROCARBONS - Arrangement for the lifting of hydrocarbons in oil field wells, comprising a lifting assembly formed by a fluid collecting hose and a fluid suction tube within the well casing. The suction tube extends along the collecting hose, which has an open upper end, through which passes the upper section of the suction tube, which has an end attached to the pulling cable of the “collecting hose/suction tube” assembly. The lower end is closed by means of a one-way check valve, letting the fluid flow into the space formed between the hose and said tube. The upper section projecting beyond the open upper end of the collecting hose has a laterally conformed fluid discharge opening. When the “hose/suction tube” assembly rises by action of the pulling cable and reaches the end of its travel, said discharge opening is positioned within a sealed chamber in the wellhead defined between a pair of sealing rings, so that the fluid may be discharged by means of a suction pump and/or under the gas pressure from within the well casing. | 10-29-2009 |
| 20080308265 | PUMPING INSTALLATION FOR A GAS PRODUCING WELL - A pumping installation for a gas producing well. A gas compressor is positioned on surface which receives gas. The compressor is powered by hydraulic fluid. An engine is positioned a sufficient distance from the gas producing well as not to pose a danger of gas explosion. A hydraulic reservoir is provided. Hydraulic fluid is circulated by the engine to supply hydraulic fluid from the hydraulic reservoir needed to power the compressor. | 12-18-2008 |
| 20080264625 | LINEAR ELECTRIC MOTOR FOR AN OILFIELD PUMP - An oilfield pump employing a linear electric motor. The linear electric motor replaces a conventional crankshaft or hydraulic techniques for driving a plunger of the pump. This may reduce the number of equipment parts and amount of maintenance expenses associated with the operation of oilfield pumps. Furthermore, the use of a linear electric motor may also increase the precision and control over the fluid delivery provided by the pump assembly. | 10-30-2008 |
| 20110220343 | HIGH FLOW INTAKE SYSTEM FOR SUBMERSIBLE PUMPS - A high flow intake system for a horizontal pump skid installation is provided for reducing cavitation and for eliminating a necessity to have a booster pump. A pump inlet assembly has a collar that is affixed to a horizontal pump body proximate a pump intake. The pump inlet assembly has a plurality, e.g., four, inlet members that protrude from the collar member at an angle, preferably, 30 degrees, from a longitudinal axis of the pump body. Each of a plurality of hoses is connected to one of the plurality of inlet members. A distribution manifold has an inlet and a plurality of outlets that receive the second ends of the hoses. Preferably, each of the hoses has a length that is at least 20 times an inner diameter so that fluid passing through each of the hoses develops laminar flow. | 09-15-2011 |
| 20090260800 | Sealed drive for a rotating sucker rod - A drive assembly for powering a rotating rod string | 10-22-2009 |
| 20110083839 | Coaxial Electric Submersible Pump Flow Meter - A venturi structure is supported below an ESP preferably off its gauge assembly below its motor so that the surrounding casing or wellbore defines the venturi path leading to the suction connection of the ESP. Multiple pressure sensing locations are provided in case the gauge that defines the venturi path is disposed off center in the bore or if the bore is on an incline. The gauge can receive forms of different sizes depending on the size of the surrounding tubular where the forms use an incline of preferably 15-20 degrees and allow for measuring differential near the perforations and at the constriction location so that the flow can be computed using the Bernoulli Equation. | 04-14-2011 |
| 20090032240 | APPARATUS FOR DRIVING ROTATING DOWN HOLE PUMPS - An apparatus for rotating down hole pumps has a right angle gear box driving a hollow output shaft. The output shaft is oriented to the vertical and supports and rotates the drive string of a down hole rotary pump. A clamp on the drive string rests on the upper end of the hollow shaft and engages the hollow shaft with a key and keyway arrangement. The hollow shaft of the right angle gearbox is sized to accommodate the drive string, including rod boxes, so that the entire drive string can be pulled through the hollow shaft without dismantling or removing the apparatus. | 02-05-2009 |
| 20100319904 | Down hole delivery system - An improved delivery system for pumping fluid from a pay zone to the surface of a well in which the well casing is fitted with a pump lodged in the pay zone of the well, a drive head at the surface of the well and a rod string connecting the two, wherein a transmission is interposed between the pump and drive head on the rod string and fluid pumped from the pay zone passes through conduit, extending longitudinally in isolation through the transmission. | 12-23-2010 |
| 20100230091 | Hydraulically Actuated Downhole Pump with Gas Lock Prevention - A hydraulic pump avoids problems with gas lock found in conventional pumps. The pump draws in production fluid in a lower pump volume during the pump's upstroke and diverts the produced fluid to an upper pump volume during the downstroke. Spent power fluid is communicated to the upper pump volume during the pump's upstroke. The pump piston in the upstroke expels the entire volume via a check valve that communicates the upper pump volume with a discharge outlet. The check valve increasing the discharge pressure of the upper pump volume, the upper pump volume of the spent power fluid being greater than the upper pump volume, and the upper pump piston compressing produced gas in the upper pump volume all combine to prevent or reduce the chances that the pump will gas lock during operation. | 09-16-2010 |
| 166069000 | With receptacle for insertion into well | 1 |
| 20090178797 | GROUNDWATER MONITORING TECHNOLOGIES APPLIED TO CARBON DIOXIDE SEQUESTRATION - A fluid monitoring system for a subsurface well in a subterranean formation includes a first zone isolator, a second zone isolator, a fluid inlet, a first pressure canister and a first gas-in line. The first and second zone isolators are positioned in the subsurface well. The fluid inlet receives fluid from the subterranean formation. The first pressure canister is positioned between the first zone isolator and the second zone isolator. The first pressure canister receives the fluid at an in-situ pressure. The first gas-in line selectively delivers a gas to the first pressure canister to pressurize the first pressure canister so that the first pressure canister is adapted to be removed from the subsurface well at a substantially similar pressure as the in-situ pressure. In one embodiment, the first pressure canister receives the fluid at an in-situ temperature. In this embodiment, the first pressure canister is adapted to be removed from the subsurface well at a substantially similar temperature as the in-situ temperature. | 07-16-2009 |
| 166070000 | Head for tool, piston or cleaner (e.g., cement head) | 9 |
| 20100101775 | PRESSURE DRIVEN APPARATUS FOR SEQUENTIAL CONTROL OF A CEMENTING HEAD - The invention relates to a pressure-driven apparatus for the sequential control of a multiphase operation, e.g. of a cementing head. A transmission arm ( | 04-29-2010 |
| 20090188664 | Launching Tool for Releasing Cement Plugs Downhole - A wiper plug release tool uses a first pump down plug that lands in the tool to pressurize an internal chamber to slide a sleeve that undermines a set of dogs to allow the lower wiper plug to be decoupled from support. The shifting of this sleeve cams a second set of dogs into an internal passage in the tool to act as a landing location for a second pump down plug. Landing the second pump down plug on the now extended dogs allows a net pressure to be applied to an upper piston which shifts a sleeve to release the support for the second wiper plug. The upper piston remains in pressure balance unless the second pump down plug can be landed on the dogs that only extended because the sleeve that released the lower wiper plug had shifted. | 07-30-2009 |
| 20080196881 | Wellbore Cleaning Tool and Method - There is disclosed a cleaning tool for use in cleaning ferrous material from a wellbore, a cleaning assembly comprising a plurality of such wellbore cleaning tools, and a method of cleaning ferrous materials from a wellbore. | 08-21-2008 |
| 20080314579 | Method and System for Inserting a Fiber Optical Sensing Cable Into an Underwater Well - A fiber optical sensing cable is inserted into an underwater well by: connecting a housing ( | 12-25-2008 |
| 20110114306 | Methods and Devices for Forming a Wellbore with Casing - A method for cementing a tubular in a wellbore in a subterranean formation, according to one or more aspects of the present disclosure, comprises connecting a circulating tool to a slip and a top drive; gripping a first tubular with the slip above the surface of the wellbore; sealingly engaging the first tubular with a seal member; fluidly connecting a wiper plug to the circulating tool; connecting the first tubular to a second tubular; and lowering the second tubular into the subterranean formation. | 05-19-2011 |
| 20110168380 | CEMENT HEAD WITH INTERGRATED ENERGY SUPPLY FOR OPERATING VALVES - A cement head used for performing cementing jobs in downhole operations is provided. The cement head includes wireless signaling means, an integrated energy supply, activating means for pneumatic operated valves in cement head, and controller means for controlling said energy supply for activation of at least one valve based on received signals through the wireless signaling means. | 07-14-2011 |
| 20100018692 | Logging Head Release Mechanism - A release mechanism for incorporation into a logging head. The release mechanism may be a tensile release mechanism that employs a plurality of tensile members for interchangeable insertion into a plurality of tensile compartments. As a result, a weakpoint for the logging head may be user defined on location at the oilfield. Furthermore, for potentially deeper wells, a rotatable release mechanism may be alternatively or additionally incorporated into the logging head. The rotatable release mechanism may be employed to effectuate a release of the logging head upon signaling from surface equipment. Additionally, the rotatable release mechanism may be powered to achieve the release solely from a downhole power source. | 01-28-2010 |
| 20100089567 | Measurement Device in a Horizontal Well - The invention relates to a logging probe ( | 04-15-2010 |
| 20110226464 | Well head lubricator assembly - A well head lubricator assembly including an elongated rigid tubular body defining an interior chamber open at a lower end to receive a plunger at a well head. The plunger is slidably positioned within the chamber in response to forces or loads acting thereon and has a seat arranged toward an upper end thereof. An upper end of the tubular body is closed. An axially elongated one-piece thermoplastic ether ester elastomer spring is slidingly positioned within the interior chamber of the tubular body. One end of the spring is seated on the seat of the plunger. The spring defines an elongated bore opening to opposed ends thereof. Moreover, the spring is provided with a plurality of axially spaced flange sections along a length thereof for guiding the spring for endwise sliding movement on an inside diameter of the tubular body. Any two flange sections on the spring are axially separated by an energy absorbing section for allowing the spring to react to energy imparted to the plunger. Each energy absorbing section on the spring defines a wall having a lateral thickness ranging between about 20% to about 30% of an axial length of the energy absorbing section extending axially between any two adjacent flange sections and such that radial expansion of the energy absorbing sections is limited to about an outermost edge of the flange sections. | 09-22-2011 |
| 166072000 | Above ground actuating means for below ground device | 11 |
| 20130037257 | POLISHED ROD WITH LATCHING SECTION - A polished rod for supporting a sucker rod string comprising a one piece shank with an upper end and a lower end. A first connector is formed on the upper end of the shank and a second connector is formed on the lower end of the shank. The shank has a sealing section extending from the lower end toward the upper end and the sealing section has a polished surface and a uniform cylindrical diameter substantially equal to the diameter of the upper end and the lower end of the shank. The shank further has a latching section formed between the sealing section and the upper end. The latching section of the shank has a diameter less than the diameter of the sealing section and the upper end. | 02-14-2013 |
| 20130037258 | Activation-Device Launcher For A Cementing Head - An activation-device launching system, mounted on a cementing head, allows the deployment of a combination of darts, balls, bombs, canisters in order to activate downhole equipment, launch cementing plugs, deliver chemical products, or the like. A valve controls the flow of process fluid, and holds an activation device in place until it is time for launching. The valve also has a hollow axle through which balls may be launched into the process-fluid stream at any time. | 02-14-2013 |
| 20090044937 | Remote actuation of downhole tools using fluid pressure from surface - An apparatus for and a method of transmitting signals from the surface of a well to a location downhole in the well utilize a downhole fluid pressure sensor, a signal processing means located downhole in electrical connection with the pressure sensor and a downhole programmable logic unit capable of counting at least two signals received by the downhole pressure sensor. Typically, signals transmitted from the surface comprise a peak in pressure of downhole fluid located in production tubing run into a well bore and these signals are sensed by the downhole fluid pressure sensor. The logic unit outputs a signal to a tool to be actuated if it receives a number of signals within a particular time period, wherein the logic unit actuates the tool by the frequency of signals received rather than the amplitude of the signals received. | 02-19-2009 |
| 20110192590 | Gas assisted lift system - An improved gas lift system for use in marginal well and small diameter production tubing is disclosed. The system uses compressed natural (produced) gas to lift formation fluids thereby enhancing produced gas. Incorporated in the system is a plurality of improved differential pressure control valves which are easier to maintain and more reliable and which provide the required lift capability with or without a standard jet pump, located at the bottom of the wellbore, to continue to lift produced fluids. The methods of use are described. | 08-11-2011 |
| 20090090501 | REMOTELY CONTROLLABLE WELLBORE VALVE SYSTEM - A remotely operable wellbore valve system includes a valve configured to be coupled to a wellbore conduit and to selectively close the conduit. The valve is disposed in a valve body configured to open an existing wellbore valve by longitudinal motion therethrough and to sealingly engage an interior of the existing wellbore valve. The system includes a valve actuator and a signal receiver in communication with the valve actuator. The signal receiver is configured to detect command signals transmitted from the Earth's surface and to cause the actuator to operate the valve in response to the detected command signals. | 04-09-2009 |
| 20100126712 | Tubing Weight Operation for a Downhole Tool - A downhole tool has housing components that are relatively movable. One of the components is supported downhole while a control line provides fluid pressure to move the other housing component relative to the supported component to put the tool in a first position. Loss of control line pressure allows the weight of tubulars bearing on the upper housing or rods to move it to put the tool in another position. The tubing weight overcomes the hydrostatic pressure in the control line even when there is no applied pressure in the control line to cause relative housing or rods movement to operate a tool. In that sense the tool can be fail safe to shut off flow, for example, on loss of control line pressure while reducing or elimination the need for a large return spring to offset hydrostatic pressure. | 05-27-2010 |
| 20090032241 | Thru diverter wellhead with direct connecting downhole control - A single or multi-bowl wellhead may be positioned in a diverter housing over the wellbore. Protrusions on the wellhead may be installed after the diverter housing is removed. The wellhead accommodates the direct connection of hydraulic lines to a hanger seated therein. An overshot running tool protects the wellhead during placement and certain operations. | 02-05-2009 |
| 20110308784 | DISCONNECT DEVICE FOR DOWNHOLE ASSEMBLY - A downhole tool for incorporation in a drill pipe for selective operation of the tool from surface level when the tool is in a wellbore. The tool comprises a controller electrically powered by a power source separate from surface level, a first sensor of the controller to detect a dynamic variable of the tool in the wellbore and produce an output signal dependent thereon; a second sensor of the controller to detect a mechanical signal transmitted from an operator at surface level; a motor driven by the power source under the control of the controller when said mechanical signal is received; and an actuator driven by the motor to actuate the tool; wherein the controller switches between at least two states in response to changes in said dynamic variable, only in said second state the controller being receptive to said mechanical signal from the operator to drive the motor. | 12-22-2011 |
| 166073000 | Tubing or casing actuated | 3 |
| 20090014168 | CASING VALVES SYSTEM FOR SELECTIVE WELL STIMULATION AND CONTROL - Casing valves for selective well stimulation and control. A well system includes at least one valve interconnected in a casing string operable via at least one line external to the casing string to selectively control fluid flow between an exterior and interior of the casing string, and the casing string, valve and line being cemented in a wellbore. A method of selectively stimulating a subterranean formation includes: positioning a casing string in a wellbore, the casing string including spaced apart valves operable via a line to selectively control fluid flow between an interior and exterior of the casing string; and for each of multiple intervals of the formation in sequence, stimulating the interval by opening a corresponding one of the valves, closing the remainder of the valves, and flowing a stimulation fluid from the casing string into the interval. | 01-15-2009 |
| 20110079381 | STAGE TOOL APPARATUS AND METHOD - A stage tool apparatus is described. In several exemplary embodiments, the stage tool apparatus is part of tubular string or casing positioned within a preexisting structure such as, for example, a wellbore. | 04-07-2011 |
| 20110180252 | CASING MANDREL FOR FACILITATING WELL COMPLETION, RE-COMPLETION OR WORKOVER - A casing mandrel for an independent screwed wellhead includes a seal bore for receiving a fixed-point packoff connected to a high-pressure mandrel of a pressure isolation tool, and a pin thread adapted for engagement with a box thread of a tubing head supported by the casing mandrel. | 07-28-2011 |
