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7599249 |
Cable motion detection
The present invention provides for cable motion detection. In one aspect of the instant invention, a method is provided for cable motion detection using orientation sensor. The method includes...
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7577060 |
Systems and methods for steering seismic arrays
Marine seismic survey systems and methods are presented. One system comprises a source array, a tow vessel, one or more source tow members, one or more deflecting members operatively connected to...
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7554880 |
Marine surveys
A method generates at least one route traversing a plurality of predetermined survey paths in a marine survey. The method includes generating a plurality of routes traversing a subset of the...
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7539079 |
System and method for determining positions of towed marine source-array elements
A system comprises a plurality of seismic transmitters, at least one seismic source array, and a processor. Each seismic source array comprises a plurality of seismic source-array elements, mounted...
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7518951 |
Systems and methods for seismic streamer positioning
Systems and methods for determining position of one or more seismic streamers are disclosed. One system embodiment includes a seismic streamer towed by a towing vessel at a first depth; at least...
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7480204 |
Seismic data processing
Implementations of various technologies for processing seismic data. In one implementation, the seismic data may be processed by creating a fictitious source-receiver line connecting a source with...
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7466627 |
System and method for wireless data collection from seismic recording buoys
A seismic data acquisition telemetry system includes a seismic vessel including a data recording system thereon. The system includes a seismic data gathering unit in operative connection with at...
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7443763 |
Full wave seismic recording system
The present disclosure generally relates to systems and methods for acquiring seismic data. In one exemplary embodiment, a method for acquiring seismic data is described in which recorder...
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7433264 |
Methods and systems for determination of vertical correction of observed reflection seismic signals
Methods and systems for determining position of seismic sources and receivers are disclosed. Signals received by a first antenna are processed to determine its 3D coordinate position. Signals...
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7417924 |
Apparatus, systems and methods for determining position of marine seismic acoustic receivers
Apparatus, systems and methods for calculating position of marine seismic acoustic receivers, and for estimating sound velocity profile of a fluid, are disclosed. One position calculation system...
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7391674 |
Methods and systems for determining orientation of seismic cable apparatus
Methods and systems for estimating one or more orientation parameters of a seismic apparatus are described. One method comprises initiating an acoustic signal from an acoustic transmitter in a...
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7376045 |
System and method for determining positions of towed marine seismic streamers
A system comprises a plurality of acoustic transmitters, mounted inside the streamers, adapted to transmit broadband signals having low cross-correlation between the signals of different...
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7315486 |
Library of velocity dependent extended spread-spectrum codes
A method and apparatus is provided for determining a propagation time delay. The apparatus includes at least one source adapted to generate a plurality of positioning signals, at least one receiver...
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7203130 |
Methods for deriving shape of seismic data acquisition cables and streamers employing a force model
Methods and systems for determining position of one or more portions of a seismic streamer, which portions may be seismic receivers, are disclosed. One method includes measuring one or more...
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7066687 |
Marine seismic surveying
A method of performing a seismic survey of a hydrocarbon reservoir in the earth formations beneath a body of water includes deploying a seismic cable from a drum carried by a remotely operated...
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7050355 |
Determining the orientation of a seismic receiver, a seismic receiver, and a method or seismic surveying
The invention provides a method of determining the orientation of a seismic receiver ( 4, 6 ) from seismic data acquired at the receiver ( 4, 6 ). The determined orientation can be taken into...
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6985403 |
Control device for controlling the position of a marine seismic streamer
A control device ( 1 ) for controlling the position of a marine streamer comprising; an annular aerofoil ( 2 ), a mount ( 3 ) for mounting the annular aerofoil onto and around the streamer; and...
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6839302 |
Acoustic emitters for use in marine seismic surveying
An acoustic emitter for coupling in series in a marine seismic streamer is provided with an annular housing and an annular piezoelectric emitting element positioned coaxially within the housing....
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6747913 |
Method and system for deghosting
In one embodiment the invention comprises a method for receiving an acoustic wavefield beneath the surface of the water in which at least a portion of an acoustic wavefield is received at a first...
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6671223 |
Control devices for controlling the position of a marine seismic streamer
A control device or “bird” for controlling the position of a marine seismic streamer is provided with an elongate, partly flexible body which is designed to be electrically and mechanically...
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6618321 |
Method for simulating streamer positioning, and for navigation aid
The invention relates to a method of simulating the positioning of a streamer towed by a ship ( 10 ) during an operation of acquiring geophysical data at sea, said acquisition operation making use...
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6483775 |
Bird communications system in a marine seismic cable
A communication housing for devices external to a solid marine seismic cable, especially for level control devices, comprises an upper housing half and a lower housing half, coupled together around...
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6076630 |
Acoustic energy system for marine operations
A marine seismic source for generating acoustic source energy. A housing has a continuous exterior perimeter which is moveable to displace water. Movement of the housing can be accomplished by...
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6005828 |
Acoustic positioning of seismic ocean bottom cable
A seismic ocean bottom positioning device include a series of seismic stations spaced apart at a predetermined interval along a cable. Each station includes a hydrophone, a motion sensing device...
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5978313 |
Time synchronization for seismic exploration system
A system and method for synchronizing collection of seismic data used for seismic surveys. In one embodiment, positioning signals received from a positioning system, such as the Global Positioning...
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5790472 |
Adaptive control of marine seismic streamers
A method for controlling the position and shape of marine seismic streamer cables, whereby a plurality of real time signals from a marine seismic data acquisition system and a plurality of...
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5771202 |
Method for acquisition of seismic data at sea
A method for acquisition of seismic data from an area surveyed using a group of seismic energy sources and a group of seismic streamer cables, particularly a marine area, includes forming a first...
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5761153 |
Method of locating hydrophones
A method of computing the location of air guns and hydrophones within a seismic spread utilizes a navigation network having a plurality of stations. The network provides a plurality of navigation...
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5757722 |
Method for verifying the location of an array of detectors
A high-order, polynomial regression curve is fitted to a global set of first-arrival pick times as a function of the nominal ranges between a plurality of acoustic sources having known geodetic...
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5696733 |
Method for verifying the location of an array of sensors
A high-order polynomial regression curve is fitted to a global set of first arrival times as a function of the nominal ranges between a plurality of acoustic sources having known geodetic...
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5668775 |
Methods for determining the position of seismic equipment, and applications of the methods
A method for determining the position of seismic equipment wherein acoustic transmitters transmit spread spectrum sequences which are received by the seismic sensors in the equipment whose position...
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5650981 |
Multi-vessel timing synchronization method and device
This invention relates generally to a method and system for synchronizing the timing of events between and among vessels using a common timing reference.
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5497356 |
Method and apparatus for verifying the location of a seismic bottom cable in real time
One or more slave acoustic transponders are secured to selected parts of a seismic bottom cable whose location is imperfectly known. A master transponder broadcasts an interrogation pulse from each...
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5353223 |
Marine navigation method for geophysical exploration
The present invention provides a method for on-line real-time processing of processing navigational data for determining the location of sensor and receiver points in a navigational network having...
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5345522 |
Reduced noise fiber optic towed array and method of using same
A sensitive towed optical fiber sensor array 50, wherein the fiber sensors (60A-60N) are connected in parallel, and the optical fiber cable (34) is paid out from the towing ship at a velocity about...
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5331603 |
Magnetic heading sensor alignment and roll reducing device
A magnetic heading sensor alignment and roll reducing device is provided. A enerally cylindrical assembly has a first end and a second end. Each end has a plurality of grooves located equiangularly...
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5319609 |
Acoustic emission system for seismic surveying at sea
An acoustic emission system for seismic surveying at sea, for the purpose of emitting a soundwave in a given direction, the system comprising firstly a plurality of immersed sources mechanically...
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5233357 |
Surveying system including an electro-optic total station and a portable receiving apparatus comprising a satellite position-measuring system
A terrestrial surveying system comprising an electro-optic total station (1) for combined measurement of angle and distance and a connection to data storage (11) or data processing devices (20),...
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5166905 |
Means and method for dynamically locating positions on a marine seismic streamer cable
A marine seismic system includes a streamer cable which is towed by a vessel in a body of water. The streamer cable includes a plurality of hydrophones located at predetermined positions in the...
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5128904 |
Method for estimating the location of a sensor relative to a seismic energy source
A method is disclosed for determining the separation between a seismic energy source and a seismic sensor, the location of which is known imperfectly. After the source emits a wavefield, the...
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5042942 |
Laser location apparatus for underwater bodies
A laser beam is projected from either an underwater body or an overhead support platform, with the laser energy being detected by the other piece of apparatus using a photo detector. Either the...
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4992990 |
Method for determining the position of seismic streamers in a reflection seismic measuring system
A method for determining the position of at least two seismic streamers (S 1 , S 2 ) in a reflection seismic measuring system, wherein hydroacoustic distance measurements are used which are taken...
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4970698 |
Self-calibrating sonar system
A method is disclosed where acoustic pulses are used to calculate the velocity of the medium. The inventive aspect of the invention is that the acoustic velocity may be calculated without initially...
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4928262 |
Marine seismic streamer retrieval system
A marine seismic streamer having a plurality of seismic recovery units spaced along the length thereof. Each unit includes an inflation flotation device that will deploy when the streamer sinks to...
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4912682 |
Point location determination at or close to the surface
The application discloses a method of determining the relative positions of a plurality of points located substantially in a common plane at or close to the surface of the sea, which method...
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4870626 |
Method for determining the position of a marine seismic receiver cable
A method for determining the position of a marine seismic receiver cable of the type which is towed behind a seismic survey vessel through the sea, wherein the azimuth and the distance from the...
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4862422 |
Method for determining the geometry of a multisource seismic wave emission device
Method for determining the geometry of a seismic wave emission device comprising a plurality of seismic sources (S11, S12, S21, etc.) towed by a ship (1) with different transverse and longitudinal...
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4855962 |
Method and system for locating and correcting the orientation of an autonomous mobile object and a non-autonomous mobile object
In a method of locating and orienting a first direction linked to the position and to the orientation of an autonomous first mobile object (M), such as a ship towing a marine geophysical...
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4845686 |
Method and device for determining the position of immersed objects with respect to the ship which tows them
A method and device are provided for determining by acoustic telemetering the position of immersed objects with respect to a ship having a location assembly connected thereto including two acoustic...
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4823325 |
Streamer retrieval system and method
A seismic streamer retrieval system utilizes an inflatable bag to lift the streamer to the water surface where it can easily be recovered. An acoustical signal or a pressure switch is used to...
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