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Multiple hydrophone cable systems

Subclass of:

367 - Communications, electrical: acoustic wave systems and devices

367014000 - SEISMIC PROSPECTING

367015000 - Offshore prospecting

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
367020000 Multiple hydrophone cable systems 89
20130044565PIEZOELECTRIC SENSORS FOR GEOPHYSICAL STREAMERS - A disclosed digital sensor includes a pair of piezoelectric sensors that respond to acceleration and pressure in opposite ways, a pair of digital transducer circuits each employing a quantized feedback path to obtain digital sensor signals for the piezoelectric sensors, and a combiner circuit that combines the digital sensor signals to produce a compensated digital output signal. The compensated digital output signal may be a pressure compensated acceleration signal, an acceleration compensated pressure signal, or both. Also disclosed is a signal detection method that includes configuring a pair of piezoelectric membranes in a piezoelectric sensor to respond to acceleration and pressure in opposite ways, and based on their responses, producing at least one of a digital pressure compensated acceleration signal and a digital acceleration compensated pressure signal. The digital signals may be produced in part by applying a quantized feedback signal to at least one of the piezoelectric membranes.02-21-2013
20130028047BOTTOM MODULE FOR SEISMIC SURVEY - A system is proposed for conducting efficient marine seismic surveys in different climatic conditions for water depths of 0-500 meters, in near-shore zones and on the land for obtaining seamless profiles. The system includes at least one bottom module (BM) and onboard devices located on a vessel. The BM can be submerged from the vessel onto a bottom ground and lifted up on the board. The BM includes a case provided with roundings on its upper surface and its bottom area, to which case are mounted damping elements, a hydrophone and a geophone block for receiving seismic data, a vacuum port, a hermetic electrical socket, and equipment arranged inside the case, including—a clock generator,—a digital compass providing angle data,—an interface board essentially reading the seismic and angle data and transmitting thereof to the onboard devices, and—a recorder board communicating with the geophones, hydrophone, and interface board.01-31-2013
20100157728HANDLING EQUIPMENT FAILURE IN A SUBTERRANEAN SURVEY DATA ACQUISITION NETWORK - A technique includes generating a data stream that contains data acquired by nodes of a subterranean survey data acquisition network and introducing data into the data stream, which describes an equipment failure that occurred in the network.06-24-2010
20100039890SEISMIC DATA ACQUISITION ASSEMBLY - A seismic data acquisition assembly includes a cable; seismic sensors that are disposed along the cable; and a filler material inside the cable. The filler includes a hydrocarbon-based liquid and an agent to cause the filler material to have a rheological property that is substantially different than a corresponding rheological property of the hydrocarbon-based liquid.02-18-2010
20120176858Co-extruded marine sensor cable jacket with anti-fouling properties - A marine sensor cable comprises a jacket covering an exterior of the sensor cable, wherein the jacket comprises an outer portion containing biocide disposed in a co-extrusion process. A method for producing a marine sensor cable jacket comprises providing a co-extruder to construct a polyurethane jacket for a sensor cable with a first extruder constructing an inner portion of the jacket and a second extruder constructing an outer portion of the jacket; producing a mixture of thermo polyurethane and biocide; supplying thermo polyurethane to the first extruder; supplying the mixture of thermo polyurethane and biocide to the second extruder; and constructing the polyurethane jacket with the outer portion containing the biocide.07-12-2012
20100039889MOUNTING A SEISMIC SENSOR IN A CABLE - An apparatus includes a cable; and a gel-based filler material, seismic sensors that are disposed in the cable. The seismic sensors are suspended in pockets, and each pocket contains a material that has a shear stiffness that is less than a shear stiffness of the gel-based filler material to attenuate a flow noise.02-18-2010
20130039149DIGITAL SENSOR STREAMERS AND APPLICATIONS THEREOF - A disclosed data acquisition system includes one or more streamers having multiple spaced apart sensor units. At least one sensor unit includes at least one digital sensor employing a quantized feedback loop to produce a digital output signal. A data recording system collects and stores data from the sensor units. The quantized feedback loop may be adapted to exert a quantized force on the sensing element. A described method for acquiring data includes deploying at least one streamer having multiple spaced apart sensor units, where at least a portion of the sensor units include a digital sensor employing a quantized feedback loop to produce a digital output signal. A stimulus event is triggered. Data is received from the sensor units and stored.02-14-2013
20130051176SEISMIC ACQUISITION USING SOLID STREAMERS - Some embodiments of the disclosed invention include a method for acquiring marine seismic data using solid streamers in a curved pattern. Streamers can be towed in a curved pattern within a body of water. While being towed in the curved patter the source may be fired and response data can be collected by the streamers as they are towed through the water in the curved/circular pattern. These streamers can be solid streamers and can be filled with a gel like substance. Moreover, the streamers can be placed at various known depths within the body of water.02-28-2013
20100278011System and method for towed marine geophysical equipment - A system comprises towed marine geophysical equipment, adapted for towing through a body of water; and a surface covering, comprising a textural attribute of shark skin, attached to the marine geophysical equipment. A method comprises towing marine geophysical equipment having a surface covering, comprising a textural attribute of shark skin, attached thereto.11-04-2010
20130058192OCEAN BOTTOM SEISMIC CABLE RECORDING APPARATUS - An ocean bottom seismic cable recording apparatus comprising a plurality of seismic node casings (03-07-2013
20130064038DUAL AXIS GEOPHONES FOR PRESSURE/VELOCITY SENSING STREAMERS FORMING A TRIPLE COMPONENT STREAMER - A seismic streamer includes a sensor comprises an axially oriented body including a plurality of axially oriented channels arranged in opposing pairs; a plurality of hydrophones arranged in opposing pairs in the channels; a pair of orthogonally oriented acoustic particle motion sensors; and a tilt sensor adjacent or associated with the particle motion sensors. The streamer has a plurality of hydrophones, as previously described, aligned with a plurality of accelerometers which detect movement of the streamer in the horizontal and vertical directions, all coupled with a tilt sensor, so that the marine seismic system can detect whether a detected seismic signal is a reflection from a geologic structure beneath the streamer or a downward traveling reflection from the air/seawater interface.03-14-2013
20130163374WATER-COUPLED UNDERWATER NODE FOR SEISMIC SURVEYS - A marine node for recording seismic waves underwater. The node includes a spherical body made of a material that has a density similar to a density of the water so that the body is buoyant neutral; a first sensor located in the body and configured to record three dimensional movements of the node; a second sensor located in the body and configured to record pressure waves propagating through the water; and one or more cables connected to the first and second sensors and configured to exit the body to be connected to an external device. The body is coupled to the water.06-27-2013
20090010101Seismic streamer having longitudinally symmetrically sensitive sensors to reduce effects of longitudinally traveling waves - A seismic streamer includes a jacket and at least one seismic sensor disposed in a sensor holder inside the jacket. The at least one sensor is oriented inside the sensor holder such that a response of the at least one sensor is substantially longitudinally symmetric.01-08-2009
20120236684SENSOR ARRANGEMENT FOR DETECTING MOTION INDUCED NOISE IN TOWED MARINE ELECTROMAGNETIC SENSOR STREAMERS - An electromagnetic sensor streamer may include a jacket, at least one electromagnetic sensor in operational communication with a voltage measuring circuit disposed inside the jacket, and at least one wire coil. The at least one wire coil is in signal communication with the voltage measuring circuit, and the voltage measuring circuit is configured to determine motion-induced voltages imparted to the at least one electromagnetic sensor in the streamer.09-20-2012
20120269033DUAL AXIS GEOPHONES FOR PRESSURE/VELOCITY SENSING STREAMERS FORMING A TRIPLE COMPONENT STREAMER - A seismic streamer includes a sensor comprises an axially oriented body including a plurality of axially oriented channels arranged in opposing pairs; a plurality of hydrophones arranged in opposing pairs in the channels; a pair of orthogonally oriented acoustic particle motion sensors; and a tilt sensor adjacent or associated with the particle motion sensors. The streamer has a plurality of hydrophones, as previously described, aligned with a plurality of accelerometers which detect movement of the streamer in the horizontal and vertical directions, all coupled with a tilt sensor, so that the marine seismic system can detect whether a detected seismic signal is a reflection from a geologic structure beneath the streamer or a downward traveling reflection from the air/seawater interface.10-25-2012
20100265793Methods for Optimizing Offset Distribution of Cross Spread 3-D Seismic Surveys Using Variable Shot Line Length - A method for acquiring three-dimensional seismic data for sub-surface geologic features wherein a seismic source array is moved along a survey pattern having a plurality of source lines of unequal lengths that are substantially parallel to each other and intersect a receiver line. The survey pattern can be repeated in an overlapping and interleaved fashion to survey a larger area.10-21-2010
20120087208Method for Deployment of Ocean Bottom Seismometers - A deployment and retrieval method for ocean bottom seismic receivers, the method employs a remotely operated vehicle (ROV) having a carrier attached thereto to carry a plurality of receivers. The receivers are individually placed on the ocean bottom floor by utilizing a conveyor to move the receivers along a linear path to remove the receivers from the carrier. In one embodiment, multiple linear conveyors may be operated independently to alter the relative positions of the receivers on the respective conveyors to adjust the weight distribution of the receivers within the carrier.04-12-2012
20110286303Coaxial support structure for towed marine seismic source arrays - A seismic source array includes at least one float. A plurality of rigid conduit sections each includes a bracket for suspension from the float at a selected depth in a body of water and configured to suspend a seismic energy source therefrom. At least one bend strain relief is coupled between adjacent rigid conduit sections. Each bend strain relief includes a coupling at each longitudinal end. Each bend strain relief includes woven fiber molded into flexible plastic for transmitting axial loading while absorbing bending and torsional stress. A seismic energy source is suspended from each bracket. Lines for operating the seismic energy sources pass through the rigid conduit sections and the at least one bending strain relief.11-24-2011
20110317515Marine acoustic vibrator having enhanced low-frequency amplitude - A seismic source includes a flextensional shell defining a longer axis and a shorter axis and at least one driver coupled to the flextensional shell proximate an end of the shorter axis. The seismic source may be a component of a marine seismic survey system. The marine seismic survey system may be utilized in a method of marine seismic surveying.12-29-2011
20110299360SEISMIC ARRAY WITH SPACED SOURCES HAVING VARIABLE PRESSURE - An over/under seismic source system includes a first umbilical to a first gun array at a first depth and a second umbilical at a different air pressure to a second gun array at a second, lower depth. The air pressure to the second, lower gun array is tuned so that the periods of the gun bubbles from the higher and lower gun arrays match in order to improve wavefield separation in subsequent data processing.12-08-2011
20110199857Wide Seismic Source Systems - A wide-azimuth marine seismic survey system according to one or more aspects of the present disclosure may include a streamer array; a first source towed from a first vessel; a second source towed from a second vessel; and a supplemental offset source towed from the first vessel and the second vessel.08-18-2011
20090274004USING TOWED SEISMIC SURVEYS THAT DO NOT HAVE COINCIDING STREAMER POSITIONS IN THE TIME LAPSE ANALYSIS OF A PRODUCING FIELD - A technique includes performing at least one intervening towed seismic survey after a prior towed seismic survey and before a future towed seismic survey. The prior towed seismic survey has associated first streamer positions, and the future towed seismic survey has associated second streamer positions that do not coincide with the first streamer positions. The technique includes using measurements that are acquired in the intervening towed seismic survey(s) to link the prior towed seismic survey to the future towed seismic survey for time lapse analysis involving the prior and future towed seismic surveys.11-05-2009
20080285381Methods for Efficiently Acquiring Wide-Azimuth Towed Streamer Seismic Data - A technique for use in marine seismic surveying includes a method and an apparatus. In one aspect, the method includes towing a seismic spread including a source multiple streamers on a generally curved advancing path, the streamers being actively steered. The source is fired and data is acquired on the curve. In other aspects, the method is performed with only a single vessel or the generally curved advancing path is a sincurve advancing path. The method may include a dual circular shoot in another aspect. And, in yet another aspect, the invention includes an apparatus comprised of a computing apparatus on board a tow vessel receiving positioning data from the marine seismic streamers. It is also programmed to: sail the tow vessel in a generally curved advancing path and actively steer the marine seismic streamers through the generally curved advancing path.11-20-2008
20110205840SEISMIC EQUIPMENT HANDLING - Launch and retrieval equipment for use in seismic testing and methods for seismic testing are described. Elements of the equipment may include a pivoting frame to hold the seismic equipment, sliding rails that hold the seismic equipment in place on the frame and a winch and line that operates to launch the seismic equipment keeping it tethered to a vessel. The launch device is capable of launching and retrieving seismic equipment without the use of conventional cranes.08-25-2011
20110205839Method for towing marine sensor streamers - A method for operating a geophysical sensor streamer in body of water includes operating a remotely operated vehicle coupled to a forward end of the streamer to tow the streamer in the water. Signals generate by sensors on the streamer are communicated substantially in real time to a recording unit on a survey vessel using at least one of electrical and optical cables in an umbilical cable connecting the remotely operable vehicle to the survey vessel.08-25-2011
20090016157Non-rigid cable for deployment of ocean bottom seismometers - A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote ocean bottom coupling and prevent fishing net entrapment. Pods are tethered together with flexible, non-rigid, non-conducting cable used to control pod deployment. Pods are deployed and retrieved from a boat deck configured to have a storage system and a handling system to attach pods to cable on-the-fly. The storage system is a juke box configuration of slots wherein individual pods are randomly stored in the slots to permit data extraction, charging, testing and synchronizing without opening the pods. A pod may include an inertial navigation system to determine ocean floor location and a rubidium clock for timing. The system includes mathematical gimballing. The cable may include shear couplings designed to automatically shear apart if a certain level of cable tension is reached.01-15-2009
20090316526SYSTEM OF SELF-PROPELLED SEISMIC STREAMERS - Systems are described which make it possible to carry out a 3D seismic survey from the surface of the sea. The systems include individual standalone assemblies each including an electrically propelled fish which tows each seismic streamer the other end of which is positioned by a tail fish. These assemblies are connected, electrically and mechanically, via an electro-towing cable to the streamlined cables for towing the diverging paravanes.12-24-2009
20110110187System and method for drag reduction in towed marine seismic equipment - A system comprises towed marine seismic equipment marine seismic equipment, adapted for towing through a body of water; and a surface covering, with longitudinal ribs, attached to the marine seismic equipment to reduce drag. A method comprises towing marine seismic equipment having a surface covering, with longitudinal ribs, attached thereto to reduce drag.05-12-2011
20100142317MULTI-VESSEL COIL SHOOTING ACQUISITION - Methods for efficiently acquiring full-azimuth towed streamer survey data are described. The methods use multiple vessels to perform coil shooting.06-10-2010
20090323468SEISMIC SENSOR CABLE - An apparatus includes a cable; and seismic sensors that are disposed in the cable. The apparatus also includes spacers that are distributed in the cable such that each seismic sensor is disposed in an interval of the cable separating a different adjacent pair of the spacers. The spacers of each pair are separated by at least twenty-five centimeters.12-31-2009
20130215714METHOD, DEVICE AND NODE FOR SEABED SEISMIC ACQUISITION - The invention concerns a method for seabed seismic acquisition. According to the invention, a pair of geophones (08-22-2013
20100208550VIBRATION ISOLATION SECTION - According to the present invention there is provided a vibration isolation section for use in a seismic streamer system, the section including: 08-19-2010
20110044128Marine Seismic Streamer with Increased Skin Stiffness - An apparatus includes a streamer having one or more seismic data acquisition devices enclosed within a skin. The skin has a modulus of elasticity of at least 30 MPa to attenuate a flow noise.02-24-2011
20110044130SEISMIC SENSOR HOLDER AND METHOD - An apparatus includes a streamer having one or more sensor holders for retaining seismic sensors therein. The sensor holders have a reduced cross-sectional area to increase gel continuity and coupling through the streamer.02-24-2011
20110044129APPARATUS AND METHOD FOR DECOUPLING A SEISMIC SENSOR FROM ITS SURROUNDINGS - An apparatus includes a streamer having one or more sensor holders for retaining seismic sensors therein. A housing is disposed about a sensor with a gel-like material disposed between the housing and the sensor, thereby decoupling the sensor from its surroundings. The housing is disposed in the sensor holder and the streamer is filled with either liquid or another gel-like material.02-24-2011
20120033525METHOD AND APPARATUS FOR MARINE WIDE AZIMUTH TOWED STREAM SEISMIC ACQUISITION - This is a method of acquiring marine wide azimuth towed streamer seismic data. Preferably, a recording boat which tows a plurality of seismic streamers and at least one source may be accompanied by a plurality of source boats that each tow at least one source. The source boats may preferably activate their respective sources such that the subsurface reflections generated by each source interfere. The time separation between successive shots may preferably be a random variable related to the lowest frequency of interest in the data. Additionally, the source boats may preferably be alternatively fired from the head and tail of the recording streamers.02-09-2012
20100054078POWERED SHEAVE FOR NODE DEPLOYMENT AND RETRIEVAL - A method and apparatus for deploying a plurality of seismic sensor units into a water column is described. The method includes providing a length of flexible cable from a cable storage device disposed on a vessel to a powered sheave, the cable having a plurality of spaced apart attachment points, routing the cable from the powered sheave to pass adjacent a workstation disposed on the vessel, deploying a free end of the cable into the water column while increasing the motion of the vessel to a first speed, operating the vessel at the first speed while providing a deployment rate of the cable at a second speed, the second speed being greater than the first speed, decreasing the second speed of the cable as an attachment point approaches the work station, and attaching at least one of the plurality of seismic sensor units to the attachment point at the workstation.03-04-2010
20100054079CONNECTOR FOR SEISMIC CABLE - A method and apparatus for a seismic cable is described. The apparatus includes a plurality of cable segments comprising at least a first cable segment and a second cable segment coupled by a connector. The connector comprises a cylindrical body having a first diameter, a portion of the body having a second diameter that is smaller than the first diameter and centrally positioned between opposing ends of the body, a first coupling section having a terminating end of the first cable segment anchored therein, and a second coupling section having a terminating end of the second cable segment anchored therein, at least a portion of the first and second coupling sections being rotatably coupled to respective ends of the body, wherein the connector isolates the first cable segment from the second cable segment. A method of deployment and retrieval of the seismic cable is also described.03-04-2010
20110058449Towed marine sensor streamer having concentric stress member - A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends the length of the jacket. The strength member is formed as a substantially flat belt having a width to thickness ratio of at least 10. At least one sensor holder is coupled to the at least one strength member. The at least one sensor holder includes at least one arcuate opening for receiving the at least one strength member. The at least one arcuate opening is laterally displaced from a center of the at least one sensor holder such that when the at least one strength member is disposed therein the at least one strength member is substantially tube shaped and substantially coaxial with the jacket.03-10-2011
20100254215Method for operating marine seismic vibrator array to enhance low frequency output - A method for operating marine seismic vibrators includes towing at least a first and a second marine seismic vibrator in a body of water beneath the hull of a vessel. At least a third marine seismic vibrator is towed at a selected depth in the water other than beneath the hull of the vessel. The at least first, second and third vibrators are operated to sweep through respective frequency ranges. The first and second frequency ranges have lowermost frequencies and uppermost frequencies respectively differing by a selected sub-harmonic frequency range. The third frequency range has a lowermost frequency at least equal to the uppermost frequency of one of the first and second frequency ranges and traverses a seismic frequency range of interest.10-07-2010
20110255369System and method for gathering marine geophysical data - A system comprises marine geophysical equipment, adapted for towing through a body of water; and tightly fitting covers, attached to the marine seismic equipment, to fill-in indentations in the marine geophysical equipment, for gathering marine geophysical data. A method comprises marine geophysical equipment having tightly fitting covers, to fill-in indentations in the marine geophysical equipment, attached thereto, for gathering marine geophysical data.10-20-2011
20110255368Method for 2D and 3D electromagnetic field measurements using a towed marine electromagnetic survey system - A method for acquiring electromagnetic data in at least two dimensions includes towing a first streamer cable behind a vessel in a body of water, the first streamer cable including a reference line extending substantially along the entire length thereof, a plurality of spaced apart measuring electrodes electrically insulated from the reference line and a voltage measuring circuit functionally coupled between each measuring electrode and the reference line. At least a second streamer cable is towed at corresponding distance from the vessel. The second streamer cable is configured substantially as the first streamer cable. The second streamer cable is displaced from the first streamer cable in one of a horizontal plane and a vertical plane. At selected times an electromagnetic field is imparted into the water. Voltage difference is determined between each measuring electrode and the reference line, and a difference between voltages measured at least one electrode on each of the first and second streamer cables is determined.10-20-2011
20100329076Deployment and Retrieval Method for Shallow Water Ocean Bottom Seismometers - A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote ocean bottom coupling and prevent fishing net entrapment. Pods are tethered together with flexible, non-rigid, non-conducting cable used to control pod deployment. Pods are deployed and retrieved from a boat deck configured to have a storage system and a handling system to attach pods to cable on-the-fly. The storage system is a juke box configuration of slots wherein individual pods are randomly stored in the slots to permit data extraction, charging, testing and synchronizing without opening the pods. A pod may include an inertial navigation system to determine ocean floor location and a rubidium clock for timing. The system includes mathematical gimballing. The cable may include shear couplings designed to automatically shear apart if a certain level of cable tension is reached.12-30-2010
20110096624Sensing Technique for Seismic Exploration - A technique facilitates performance of seismic surveys in a variety of land and marine environments. The technique employs one or more optical fibers designed for deployment in a seismic survey region. Each optical fiber comprises multiple seismic sensors that are formed in the optical fiber, and those multiple seismic sensors are utilized in detecting reflected seismic signals.04-28-2011
20100165787STREAMER CABLE WITH ENHANCED PROPERTIES - The present invention relates to streamer cables. One embodiment of the present invention relates to a method for preparing a streamer cable. The method may comprise retrofitting the streamer cable with a solid void-filler material, where the streamer cable was configured as a liquid-filled streamer cable. The retrofitting may comprise introducing a void-filler material into the streamer cable when the void-filler material is in a liquid state and curing or otherwise solidifying the void-filler material to a solid state. In another embodiment, the present invention relates to a streamer cable comprising an outer skin and-at least one sensor positioned within the outer skin. The streamer cable may also comprise a solid void-filler material positioned between the outer skin and the at least one sensor, wherein the solid void-filler material is coupled to the at least one sensor.07-01-2010
20100067326CETACEAN PROTECTION SYSTEM - An embodiment according to one or more aspects of the present disclosure for conducting a marine survey includes towing a survey spread comprising a plurality of receivers and an energy source along a selected course; emitting a signal from an energy source; receiving data from the plurality of receivers; detecting a cetacean from the received data; positioning the detected cetacean; limiting contact with the detected cetacean; and conducting a marine survey.03-18-2010
20110261646Sinusoidal Marine Seismic Data Acquisition - A method of acquiring marine seismic data using an acoustic source to generate an acoustic signal, a portion of which is reflected at one or more subsurface formation interfaces as a seismic signal is described. The method includes sailing a surface vessel along a sail line which lies over a survey area while towing a seismic streamer, the sail line having a sinusoidal configuration defined by an amplitude and a wavelength. The streamer includes a plurality of hydrophones for receiving the reflected portion of the acoustic signal. The method is characterised in that the streamer follows the sinusoidal configuration of the sail line while seismic data is acquired, the streamer having a length at least equal to the distance travelled by the surface vessel as it sails along one full wavelength of the configuration as measured along the sinusoidal sail line.10-27-2011
20110051550System and Method for Deployment of Seismic Data Recorders - A system and method for deployment of a plurality of seismic recorder assemblies from a survey vessel on the ocean bottom is disclosed. The seismic recorder assemblies are self contained, autonomous nodal devices which are capable of receiving and recording reflected seismic energy and storing the data locally while operating for an extended period of time. The assemblies each have two or more attachment points for the connection of separate connecting cable segments.03-03-2011
20090040871WIDE TOW ENABLED BY MULTICOMPONENT MARINE SEISMIC CABLE - A technique for use in towed-array, marine seismic surveys includes a method and an apparatus. The method includes accessing a set of multicomponent seismic data acquired in a wide tow, marine seismic survey; and interpolating a set of seismic data from the acquired seismic data in the crossline direction such that the combined acquired and interpolated seismic data meet the discrete spatial sampling theory requirements for array detection of broadside seismic signal and the discrimination and suppression of broadside linear noise. In some aspects, the technique includes programmed storage media and/or programmed computers for use in executing such a method. The apparatus is a wide tow array, including a plurality of streamers spaced apart by a cable separation exceeding the maximum cable spacing for array detection of broadside seismic signal and the discrimination and suppression of broadside linear noise as determined by discrete spatial sampling theory.02-12-2009
20090219783Method of Conducting a Seismic Survey - A method of conducting a seismic survey of an area including a region of high seismic velocity regimes in a shallow overburden. According to the method, a zone is identified in which the boundary of the high seismic velocity region has a substantially constant critical angle and a course is plotted through the identified zone. A zone based directional seismic source is applied sequentially, with a directivity angle equal to or close to the measured critical angle. The response is detected using receivers.09-03-2009
20110305107FLARING METHODOLOGIES FOR MARINE SEISMIC DATA ACQUISITION - A method of determining an optimal flare spacing for streamers towed behind a seismic vessel comprising the steps of: using a computer specially adapted with a seismic data analysis package to analyze prior seismic data for a survey area; analyzing migration broadcast patterns to estimate a maximum sampling distance; calculating a wavelet expansion as a function of flare spacing; creating synthetic gaps in the prior seismic data coverage by dropping traces at different flare spacing; testing capability of different interpolation algorithms in the seismic data analysis package to close the synthetic gaps; and determining an optimal flare spacing based upon the capability of the different interpolation algorithms to close the synthetic gaps.12-15-2011
20100195435Protective socket for a sensor node - The present invention relates to a seismic cable (08-05-2010
20100302900Autonomously operated marine seismic acquisition system - A seismic survey system includes at least one autonomously operated vehicle and at least one seismic energy source associated with the autonomously operated vehicle. The autonomously operated vehicle includes a controller programmed to operate the at least one seismic energy source at selected times and to cause the autonomously operated vehicle to follow a predetermined geodetic path.12-02-2010
20110317516SEISMIC STREAMER PLATFORM - A technique includes designing a streamer, which includes a cable and seismic sensors based at least in part on a relationship between vibration noise and a bending stiffness of the cable.12-29-2011
20110158044METHOD AND APPARATUS FOR ACQUIRING WIDE-AZIMUTH MARINE DATA USING SIMULTANEOUS SHOOTING - A technique for acquiring wide azimuth seismic data using simultaneous shooting is presented in which a plurality of seismic sources are positioned to achieve a desired crossline sampling as a function of the number of passes. This is accomplished by “interleaving” sources as deployed in the spread, as positioned in multiple passes, or some combination of these things, to achieve an effective shotline interval during acquisition or an effective crossline sampling less than their crossline source separation.06-30-2011
20120002502Methods for gathering marine geophysical data - In a first embodiment the invention comprises a method for gathering geophysical data, including towing geophysical data gathering equipment behind a survey vessel in a body of water, said equipment including an array of sensor streamers extending behind said vessel, and determining a geodetic location of a streamer steering reference point at a forward end of the sensor streamers and a reference direction. At least one sensor streamer included in said array of sensor streamers is laterally deflected in response to the determined geodetic location of said streamer steering reference point and the determined reference direction.01-05-2012
20120002503Seismic Acquisition in Marine Environments Using Survey Paths Following a Series of Linked Deviated Paths and Methods of Use - Methods and systems are provided for acquiring seismic data in a marine environment using survey paths following a series of linked curved paths so as to obtain multi-azimuthal data over a sub-surface target. Marine vessels towing multiple seismic streamers may be configured to travel substantially along a series of linked deviated paths or a series of linked curved paths. Sources may be excited to introduce acoustic wave energy in the marine environment and into the subsea region. The acoustic wave energy then reflects and refracts from the subsea region to form reflected and refracted wave energy, which is detected by seismic receivers spaced along the streamers. The detected seismic data is then interpreted to reveal seismic information representative of the surveyed subsea region. Other enhancements include configuring the streamers in a flared configuration, where the lateral spacing increases rearwardly over the length of the seismic streamers.01-05-2012
20090296520ACQUIRING NEAR ZERO OFFSET SURVEY DATA - To acquire near-zero offset survey data, a survey source and a first streamer attached to the survey source are provided, where the first streamer has at least one survey receiver. A second streamer separate from the survey source and the first streamer includes survey receivers. Near-zero offset data is measured using the at least one survey receiver of the first streamer.12-03-2009
20090251991SYSTEM FOR ACQUIRING SEISMIC DATA IN A MARINE ENVIRONMENT, USING SEISMIC STREAMERS COUPLED TO MEANS FOR DETECTING AND/OR LOCATING MARINE MAMMALS - Discloses herein is a a system of acquiring seismic date in a marine environment, which includes: seismic streamers towed by a vessel; and means for detecting and/or locating marine mammals, characterised in that said marine mammal detection and/or location means are secured to said seismic streamers.10-08-2009
20090122641Array grouping of seismic sensors in a marine streamer for optimum noise attenuation - A marine seismic streamer includes at least one particle motion sensor array. The array includes a plurality of particle motion sensors disposed at spaced apart locations along the streamer. Outputs of the particle motion sensors are functionally coupled to form an array. A number of the particle motion sensors and a spacing between adjacent particle motion sensors are selected to attenuate noise in a selected mode of propagation and within a selected wavenumber range. The streamer includes means for weighting a signal output of each particle motion sensor in the at least one array. A signal weight applied to each sensor by the means for weighting is selected to optimize attenuation of the noise.05-14-2009
20110103180Solid Seismic Streamer cable and Method - An apparatus includes a streamer cable having one or more seismic devices disposed within a polymer body and about a core. The polymer body includes a channel defined therein for receiving one or more wires connecting the seismic devices. The wires include slack for withstanding the tensional forces experienced by the streamer cable during deployment and operation. Associated methods are also described.05-05-2011
20120120760Active Detection of Marine Mammals During Seismic Surveying - An embodiment according to one or more aspects of the present disclosure for conducting a marine survey includes towing a survey spread comprising a plurality of receivers and an energy source along a selected course; emitting a signal from an energy source; receiving backscattered acoustic signals at the receivers; and actively detecting a cetacean from the received data.05-17-2012
20120250456SYSTEMS AND METHODS FOR ENERGY HARVESTING IN A GEOPHYSICAL SURVEY STREAMER - A disclosed geophysical survey system includes one or more streamers having sensors powered by at least one energy harvesting device that converts vibratory motion of the streamers into electrical power. The vibratory motion may originate from a number of sources including, e.g., vortex shedding, drag fluctuation, breathing waves, and various flow noise sources including turbulent boundary layers. To increase conversion efficiency, the device may be designed with an adjustable resonance frequency. The design of the streamer electronics may incorporate the energy harvesting power source in a variety of ways, so as to reduce the amount of wiring mass that would otherwise be required along the length of the streamer.10-04-2012
20120163119COMBINATION MOTION AND ACOUSTIC PIEZOELECTRIC SENSOR APPARATUS AND METHOD OF USE THEREFOR - Sensors used in mapping strata beneath a marine body are described, such as used in a flexible towed array. A first sensor is a motion sensor including a conductive liquid in a chamber between a rigid tube and a piezoelectric motion film circumferentially wrapped about the tube. A second sensor is a traditional acoustic sensor or a novel acoustic sensor using a piezoelectric sensor mounted with a thin film separation layer of flexible microspheres on a rigid substrate. Additional non-acoustic sensors are optionally mounted on the rigid substrate for generation of output used to reduce noise observed by the acoustic sensors. Combinations of acoustic, non-acoustic, and motion sensors co-located in rigid streamer housing sections are provided.06-28-2012
20120314535SYSTEM AND METHOD OF A MARINE SURVEY USING VERTICALLY ORIENTED SENSOR STREAMERS - Marine surveys using vertically oriented sensor streamers. At least some embodiments are vertically oriented sensor streamers where each sensor streamer includes: an elongated outer jacket; a plurality of hydrophones coupled to the outer jacket, each hydrophone of the plurality of hydrophones longitudinally spaced along the outer jacket; a plurality of three-axis motion detectors, each three-axis motion detector of the plurality of three-axis motion detectors longitudinally spaced along the outer jacket; and a plurality of electrodes coupled to the outer jacket, each electrode of the plurality of electrodes longitudinally spaced along the outer jacket, and the plurality of electrodes electrically exposed outside the outer jacket. Other embodiments may also comprise a plurality of electrodes on each sensor streamer, the electrodes for measuring electromagnetic energy.12-13-2012
20080291779Marine Seismic Acquisition System - A marine cable for seismic surveys is described with a plurality of ceramic pressure sensors (11-27-2008
20120314536ENHANCING LOW FREQUENCY CONTENT IN MARINE SIMULTANEOUS VIBROSEIS ACQUISITION - A technique is designed for conducting a seismic survey. The technique utilizes a plurality of vibrator arrays employed to conduct a seismic survey utilizing low frequency and high frequency vibrators in each vibrator array. The plurality of vibrator arrays continuously sweeps low frequency signals via low frequency vibrators. While sweeping low frequency signals, high-frequency vibrators emit high-frequency signals in an alternating pattern between vibrator arrays to enhance the seismic survey.12-13-2012
20120176860System and Method for Using Biocide Coating to Prevent Marine Growth on Geophysical Equipment - Systems and methods comprise marine geophysical equipment with polyurethane-based material at least partially covering a surface. The surface also at least partially coated with a suspension medium and with a biocide. A method comprises disposing such marine geophysical equipment in a body of water. A method comprises applying a suspension medium and a biocide to a surface at least partially covered with a polyurethane-based material.07-12-2012
20120176859MARINE SEISMIC STREAMERS - The subject disclosure relates to seismic streamers. More specifically, the subject disclosure relates to seismic streamers with self healing properties.07-12-2012
20120250457SYSTEMS AND METHODS FOR WIRELESS COMMUNICATION IN A GEOPHYSICAL SURVEY STREAMER - A disclosed survey method includes towing geophysical survey streamers in a body of water and using sensors within the streamer to collect measurements that are then conveyed along the streamer to a recording station using at least one wireless transmission link. In some implementations at least one sensor is coupled to a wireless transceiver in a streamer to transmit geophysical survey measurement data along the streamer to a wireless base station. The base station receives the wirelessly transmitted seismic data and communicates it to a central recording station. Each segment of the streamer may contain a base station to collect wireless data from the sensors in that segment, and each base station may be coupled to the central recording station by wiring (e.g., copper or fiber optic). Other implementations employ ranges of sensors wired to local transceivers that form a peer-to-peer wireless network for communicating data to the central recording station.10-04-2012
20120081997Marine Vibrator with Improved Seal - A marine vibrator with improved seal is described. The marine vibrator includes a housing and piston within the housing for generating vibratory signals. The improved seal is comprised of a two-stage seal having a first seal disposed adjacent the water interface and a second seal disposed away from the water interface, thus improving the reliability of the marine vibrator.04-05-2012
20120081996Determining Sea Conditions in Marine Seismic Spreads - According to one or more aspects of the invention, a marine seismic survey method comprises towing at least two streamers below a sea surface forming a survey spread, each streamer comprising a survey sensor and a profiler; and at each profiler, emitting an acoustic signal; recording an echo of the emitted signal at the profiler; and determining a parameter from the recorded echo, the parameter comprising at least one selected from the group of a distance between the profiler and the sea surface, a water current vector and a sea surface slope.04-05-2012
20100182872SEISMIC CABLE STRUCTURE - There is described an optical seismic cable (07-22-2010
20100254216Multiwing Surface Free Towing System - A technique for seismic surveying is presented in which a towed array, marine seismic spread, includes a plurality of streamers and a deflector system. The deflector system laterally spreads the seismic streamers, wherein at least one streamer in the spread is deflected using more than one deflector attached to the tow cable or streamer, and where the deflectors are not connected to a float on the sea surface. Other aspects of the technique include methods for towing such a spread and for controlling such a spread. Still other aspects include computing resources which may be used to perform the methods.10-07-2010
20120087207PROCESSING SEISMIC DATA - A method of monitoring a marine seismic source array comprises, consequent to actuation of a seismic source array (04-12-2012
20110158045System for adjusting geophysical sensor streamer front end towing depth - A system for towing a marine geophysical sensor streamer includes a lead in line extending from a tow vessel. A streamer front end termination is coupled to an end of the lead in line and to a forward end of the sensor streamer. A floatation device is coupled by a line proximate to the front end termination. A winch is disposed on the floatation device to extend and retract the line. A depth sensor is disposed proximate the front end termination. A controller is in signal communication with the winch and the depth sensor so that the forward end of the streamer is maintained at a selected depth in the body of water.06-30-2011
20120243370SEISMIC STREAMER FORMED OF SECTIONS COMPRISING A MAIN SHEATH COVERED WITH AN EXTERNAL SHEATH FORMED USING A THERMOPLASTIC MATERIAL LOADED WITH A BIOCIDE MATERIAL - System and method for providing an anti-fouling function to a streamer to be towed under water for seismic survey data collection. The method includes mixing a thermoplastic material with a biocide material to form an external sheath material; and forming an external sheath over a main sheath of the streamer to provide the anti-fouling function. The external sheath is formed from the external sheath material such that the biocide material is distributed throughout the external sheath.09-27-2012
20120250458ANTI-BARNACLE NET AND METHOD - Method and an array of streamers that prevent/slow down marine animals to attach to the streamers. The array includes at least one streamer including plural sections; and a net provided over at least one section of the at least one streamer.10-04-2012
20130114374ADJUSTABLE SENSOR STREAMER STRETCH SECTION FOR NOISE CONTROL FOR GEOPHYSICAL SENSOR STREAMERS - A sensor streamer stretch section includes at least one spring. A means for coupling the spring at each end to at least one of a sensor streamer and a lead in cable is included. A cable is coupled at its ends to the means for coupling. The cable is capable of carrying at least one of electrical and optical signals. The cable is formed such that the cable undergoes substantially no axial strain when the shock cord is elongated. An adjustable damper is coupled between the means for coupling at each end of the stretch section.05-09-2013
20130100765ACQUISITION SCHEME FOR VIBROSEIS MARINE SOURCES - Control mechanisms, computer software and methods for driving vibrational source arrays underwater. An incoherent acquisition scheme drives individual source elements simultaneously and incoherently while a coherent acquisition scheme drives high-frequency individual source elements simultaneously and incoherently and low-frequency individual source elements simultaneously and coherently. Thus, denser coverage and an increased energy input is achieved for the source arrays.04-25-2013
20130100764ACQUISITION SCHEME FOR VIBROSEIS MARINE SOURCES - Control mechanisms, computer software and methods for driving vibrational source arrays underwater. An incoherent acquisition scheme drives individual source elements simultaneously and incoherently while a coherent acquisition scheme drives high-frequency individual source elements simultaneously and incoherently and low-frequency individual source elements simultaneously and coherently. Thus, denser coverage and an increased energy input is achieved for the source arrays.04-25-2013
20110273957Apparatus and Method for Decoupling a Seismic Sensor From Its Surroundings - An apparatus includes a streamer having one or more sensor holders for retaining seismic sensors therein. An elastic material is disposed about the sensor, thereby decoupling the sensor from its surroundings. The streamer is filled with a gel-like material that is in communication with the elastic material disposed about the sensor.11-10-2011
20130148468NOISE REDUCTION SYSTEMS AND METHODS FOR A GEOPHYSICAL SURVEY CABLE - A disclosed geophysical survey cable includes a signal amplifier coupled between two electrodes spaced apart along the length of the geophysical survey cable (the electrodes being coupled to the signal amplifier by a first conductor pair), and a noise amplifier coupled to a second conductor pair positioned substantially parallel to the first conductor pair. The geophysical survey cable further includes a combiner that combines a noise signal provided by the noise amplifier with a sensor signal provided by the signal amplifier to provide a sensor signal with a reduced noise component.06-13-2013
20120275265BUOY FOR MARINE SURVEYS - Buoy for marine surveys. At least some of the illustrated embodiments are a buoy including an elongated main body and a mast system coupled to the elongated main body. The mast system includes: a forward mast; an aft mast; a spanning portion coupled between a distal end of the forward mast and a distal end of the aft mast; and an aperture defined at least in part by the main body, forward mast, aft mast, and spanning portion. The buoy is configured to float in water such that the water level intersects the forward mast and aft mast, the elongated body is submerged, and the spanning portion resides above the water level.11-01-2012
20110292760SEISMIC EQUIPMENT HANDLING - Launch and retrieval equipment for use in seismic testing and methods for seismic testing are described. Elements of the equipment may include a pivoting frame to hold the seismic equipment, sliding rails that hold the seismic equipment in place on the frame and a winch and line that operates to launch the seismic equipment keeping it tethered to a vessel. The launch device is capable of launching and retrieving seismic equipment without the use of conventional cranes.12-01-2011
20110292759Structure for marine electromagnetic sensor streamer suited for manufacturing by extrusion - A method for making a marine electromagnetic survey streamer includes affixing connectors to longitudinal ends of a strength member. At least one signal communication line is extended along the length of the strength member. The strength member, connectors, and at least one signal communication line form a mechanical harness. Electrodes are affixed to the mechanical harness at selected positions. The mechanical harness is drawn through a co-extruder. The co-extruder fills void spaces in the harness with a void fill material. The co-extruder applies a jacket to an exterior of the void filled harness.12-01-2011
20110292758Method for Deployment of Seismic Recorder Array With Removable Data Recorders - A method of deploying a seismic recorder array on a seafloor is disclosed. The seismic recorder array comprises a plurality of removable seismic data recorders. The method comprises the step of forming the seismic recorder array by connecting a plurality of recorder housings in series, wherein adjacent recorder housings are connected by a connector cable. The recorder housings are configured to retain the removable seismic data recorders. The method comprises the step of loading the plurality of removable seismic data recorders in the recorder housings, and lowering the seismic recorder array into water until the seismic recorder array is positioned on the seafloor underlying the water. The method comprises the step of operating the seismic data recorders to detect seismic signal reflections and to record seismic data representing the reflections.12-01-2011
20110310698Dual Axis Geophones For Pressure/Velocity Sensing Streamers Forming a Triple Component Streamer - A seismic streamer includes a sensor comprises an axially oriented body including a plurality of axially oriented channels arranged in opposing pairs; a plurality of hydrophones arranged in opposing pairs in the channels; a pair of orthogonally oriented acoustic particle motion sensors; and a tilt sensor adjacent or associated with the particle motion sensors. The streamer has a plurality of hydrophones, as previously described, aligned with a plurality of accelerometers which detect movement of the streamer in the horizontal and vertical directions, all coupled with a tilt sensor, so that the marine seismic system can detect whether a detected seismic signal is a reflection from a geologic structure beneath the streamer or a downward traveling reflection from the air/seawater interface.12-22-2011
20120069703SEISMIC STREAMER - There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterised by a buffer layer 03-22-2012

Patent applications in class Multiple hydrophone cable systems