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7616522 |
Seismic streamer with irregularly spaced hydrophones
A seismic streamer and a method for positioning a group of hydrophones in a seismic streamer. The hydrophones in a group are spaced irregularly along the length of the streamer to reduce the...
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7602667 |
Breakaway deployment cable for underwater seismic recording system
A seismic cable system for joining the free ends of a seismic cable utilizing a connector which will separate when subject to a predetermined load. The system includes a first cable connector...
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7590028 |
Seabed seismic cables and methods of stabilizing same when deployed on a seabed
Apparatus and methods for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, including controlling effect of water flow on the cable during data...
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7573781 |
Streamer 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...
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7570543 |
Normally closed pressure-sensitive hydrophone switch
A pressure-sensitive switch comprising an electrically-insulating base member having front and back surfaces with a through opening extending between the two at the center of the base member. Two...
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7558155 |
Optical sensor interrogation with wavelength grouping in time slots
Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments,...
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7554885 |
Polarization diversity for optical fiber applications
At least two light beams with polarization diversity are generated that each carry a representation of the same information. Separate optic fibers carry each of the at least two beams through a...
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7548486 |
System for reducing towing noise in marine seismic survey streamers
A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the jacket. The strength member is disposed inside the jacket. At...
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7545703 |
Marine seismic streamer with varying spacer distances for reducing towing noise
A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the jacket. The strength member is disposed inside the jacket. At...
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7539080 |
Grating design for use in a seismic sensing system
Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments,...
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7518948 |
Marine seismic streamer having soluble encapsulant surrounding seismic sensors therein
A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the streamer and is disposed inside the jacket. At least one...
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7483335 |
Permanently installed seismic ocean bottom cable
A seismic ocean bottom cable array is provided for use in subsurface exploration. The array includes receiver stations for measuring seismic signals, and a cable including conductors for data...
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7466625 |
Noise estimation in a vector sensing streamer
A method includes recording a first set of data using a first type of sensor; recording a second set of data using a second type of sensor, the first and second sets of data being contemporaneously...
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7466624 |
Armored seabed laid seismic cable and method and apparatus for manufacturing same
A method for wrapping continuous strands of steel wire about a seismic cable including interconnected sensor sections and conductor sections where a cross sectional diameter of the sensor section...
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7453763 |
Geophysical data acquisition system
The invention includes a geographical sensor apparatus for use under water in the sea, including a plurality of seismic sensors ( 1 ) for sensing seismic waves associated with underground...
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7450468 |
Methods, systems, and computer readable media for interactively determining parameters for ocean-bottom hydrophone/geophone receiver combination deghosting
Methods, systems, and computer readable media are provided for interactively determining optimum deghosting parameter values for suppressing ghost reflections. Seismic data are obtained from...
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7426439 |
Method and apparatus for marine seismic data acquisition
The present invention provides a method and apparatus for seismic data acquisition. One embodiment of the method includes accessing data acquired by at least two particle motion sensors. The data...
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7411863 |
Marine seismic data acquisition systems and methods
Systems and methods for acquiring marine seismic data are described. One system comprises a marine seismic spread adapted to survey a sub-sea geologic deposit, the spread comprising one or more...
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7382689 |
Flexible hydrophone
A hydrophone includes a body formed of a flexible, plastic material. The body includes a plurality of channels and each channel may have one or more wells. The wells are adapted to receive an...
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7379385 |
Processing of seismic data acquired using over/under streamers and/or over/under sources
Implementations of various techniques for processing seismic data acquired by three or more over/under streamers. In one implementation, the seismic data may be processed by grouping the seismic...
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7333391 |
Universal seismic cable connector
A hermaphroditic connector for a multiple conduit cable assembly comprises a cylindrical protective collar surrounding an inner cylindrical core. The collar is axially secured to the inner core but...
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7319636 |
Calibration of pressure gradient recordings
A method for computing a pressure signal gradient. The method includes recording a plurality of pressure signals at least one of a first receiver and a second receiver. The first receiver and the...
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7270214 |
Method and apparatus for reducing and extracting wing-tip vortex energy
The present invention provides an apparatus and a method for reducing wing-tip vortex energy during seismic exploration. The apparatus includes a vortex concentrator of deployed proximate a tip of...
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7239577 |
Apparatus and methods for multicomponent marine geophysical data gathering
In one embodiment the invention comprises a particle velocity sensor that includes a housing with a geophone mounted in the housing. A fluid that substantially surrounds the geophone is included...
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7230878 |
Methods and apparatus for seabed seismic data acquisition
Methods and apparatus for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, one method including deploying a seabed seismic cable, the cable comprising...
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7221623 |
Expansion coefficient balancing in pressure compensation systems
The use of a pressure compensation system and composite polymer materials results in a new type of outboard sensor assembly, of the type used to monitor the status and location of towed array...
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7221620 |
Apparatus for seismic measurements
An apparatus for three-dimensional single-channel seismic measurements, wherein at least one seismic source and hydrophone devices are towed behind a vessel, and a pair of submerged deflectors are...
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7206254 |
Underwater cable arrangements and devices
The present invention provides an underwater cable arrangement includes an underwater cable having one or more external devices mounted on the cable. In one form of the invention, the external...
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7193931 |
System and method for synchronous sampling and asynchronous transfer of data with connectionless powering and control of data link subsystems
A system and method for measuring the value of a parameter, e.g. sound energy, at a plurality of spaced locations using electrically powered microcells positioned at each of the locations and for...
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7184366 |
Short seismic streamer stretch section with adjustable spring force
A seismic streamer stretch section includes at least one spring member. The section includes means for coupling the at least one spring member at each end to at least one of a seismic streamer and...
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7184365 |
Unitary multi-cable towing system
In one aspect the invention comprises a system and a method for marine geophysical exploration, which includes a first cable connected to a vessel and a plurality of streamer cables connected to...
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7167413 |
Towed streamer deghosting
Apparatus and methods for reducing ghosts from hydrophone signals in a streamer towed underwater close to the sea surface. A multi-axis micro-electro-mechanical-system (MEMS) accelerometer with...
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7139217 |
Water bottom cable seismic survey cable and system
A seismic sensor cable is disclosed. The cable includes an outer jacket disposed on an exterior of the cable. The outer jacket excludes fluid from entering an interior of the cable. A reinforcing...
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7132952 |
Security system for a portable article
The combination of a portable article and a security system. The security system has a flexible element/tether with a length. The flexible element/tether is connected between the portable article...
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7130242 |
System and method for detecting an acoustic signal in the presence of flow noise
A system and method are provided for detecting an acoustic signal in the presence of flow noise produced by the turbulent flow field that develops about a hosewall of a towed array. Pressure is...
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7120087 |
Electronics-carrying module
An electronic-carrying module ( 640 ), for example for use with a seismic data acquisition cable ( 400 ), is disclosed. The preferred electronic-carrying module ( 640 ) includes, first, an...
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7113448 |
Water bottom cable seismic survey cable and system
A seismic sensor cable is disclosed. The cable includes an outer jacket disposed on an exterior of the cable. The outer jacket excludes fluid from entering an interior of the cable. A reinforcing...
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7061829 |
Water bottom cable seismic survey cable and system
A seismic sensor cable is disclosed. The cable includes an outer jacket disposed on an exterior of the cable. The outer jacket excludes fluid from entering an interior of the cable. A reinforcing...
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7031223 |
Method for correcting seismic data for receiver movement during data acquisition
A method is disclosed for processing seismic data. The method includes determining a position of a seismic energy source and seismic receivers at a time of actuation of the source. A velocity of...
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6982926 |
Apparatus and method for bubble shielding towed marine cable
A cable for towing marine devices is disclosed. The cable includes a strength member and at least one conduit associated with the strength member. The conduit has apertures therein at selected...
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6982925 |
Fiber-optic seismic array telemetry, system, and method
A method and system for interrogating a seismic sensor in a seismic cable having modular sensing stations spaced along the seismic cable and a connection module head end of the sensor sections,...
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6906981 |
Method and system for acquiring marine seismic data using multiple seismic sources
A method for seismic surveying is disclosed which includes towing a first seismic energy source and at least one seismic sensor system. A second seismic energy source is towed at a selected...
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6876599 |
Seismic data acquisition and processing method
A method of acquiring and processing seismic data including: acquiring digitized seismic data associated with a plurality of moving receiver points using a plurality of seismic sensors; attenuating...
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6751559 |
Method for suppressing noise from seismic signals by source position determination
A method is disclosed for attenuating noise from marine seismic signals caused by a noise in the water. The method includes determining an arrival time of a noise event at each of a plurality of...
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6708640 |
Tow cable termination assembly
A distributed fiber strength member tow cable termination assembly (DTCTA) having a strength member termination area which is spaced from a signal conductor termination area, and which includes a...
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6691038 |
Active separation tracking and positioning system for towed seismic arrays
A method and apparatus comprising an active control system for a towed seismic streamer array that enables any relative positional control of any number of towed seismic streamers. The streamer...
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6684160 |
Marine seismic acquisition system and method
A method and system for performing a marine seismic survey is described, including towing at least one seismic streamer comprising a plurality of hydrophones distributed at average intervals of not...
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6678212 |
Seismic cables and a method for manufacturing such
A seismic cable ( 1 ) and a method of manufacturing such a cable. The cable includes a plurality of elongated electrical/optical elements which are arranged to be interconnected with a number of...
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6657921 |
Marine seismic sensor deployment system including reconfigurable sensor housings
A system for collecting seismic data from geologic formations underlying water. A plurality of hydrodynamic housings are deployable in the water and are permitted to descend at a fast rate through...
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6631095 |
Seismic conductive rope lead-in cable
A conductive rope-like lead-in cable connects a seismic streamer to a towing vessel. The lead-in cable comprises a first electrical conductor at the center core of the cable for carrying a first...
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