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7551518 |
Driving means for acoustic marine vibrator
A marine vibrator that in a particular embodiment includes a substantially elliptically shaped outer shell, a driver having a first and second end, at least one outer spring connected between the...
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7463549 |
Apparatus and method for carrying out seismic surveys
A 4D seismic source comprising a series of sub-arrays of guns on flotation devices. Each flotation device has a GPS device. For firing, the guns in the e.g. three sub-arrays identified as being...
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7377357 |
Marine seismic acquisition method and apparatus
A marine seismic source method capable of retaining low frequencies is disclosed. One embodiment of the method comprises a seismic source that generates an up-going wave and first down-going wave...
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7339852 |
Seismic acquisition system
A seismic acquisition system comprising a remote-controlled buoy for conducting seismic acquisition operations. The buoy comprises an operating system for operating a seismic wave production device...
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7324406 |
Sensor arrangement for seismic waves
A sensor arrangement is provided for use in the seismic investigation of geological formations below the seabed. A plurality of sensor nodes ( 20 ) are provided and are positioned gfor deployment...
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7257049 |
Method of seismic surveying, a marine vibrator arrangement, and a method of calculating the depths of seismic sources
A method of seismic surveying comprises emitting seismic energy at two or more different depths during a sweep. In one embodiment, the depth of a seismic source is varied during a sweep, by raising...
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7028807 |
Non-explosive acoustic source
A non-explosive acoustic source utilizes the combustion of aluminum and water to generate an acoustic pulse. The operation of the non-explosive acoustic source relies on a water/aluminum reaction...
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7016261 |
Deep penetrating focused array
Disclosed herein is a single point seismic system comprising an array of air guns disposed within a frame. The array includes a cluster of air guns on one of its ends and a reduction in chamber...
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6961284 |
Source array for use in marine seismic exploration
A staggered vertical marine seismic source contains upper and lower arrays ( 10, 11 ) of emitters of seismic energy (S11, S12; S21, S22). The upper array ( 10 ) is horizontally displaced relative...
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6932185 |
Acquisition method and device for seismic exploration of a geologic formation by permanent receivers set on the sea bottom
A method and device for seismic exploration of a subsea geologic formation by pickups set on the sea bottom and intermittently connectable to active data acquisition stations ( 11 ) brought nearby....
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6873572 |
Low-frequency sonar countermeasure
A multi-port projector of acoustic energy in water includes a cylindrical hollow transducer having open annular ends. A thin, flexible member is secured to each annular end to extend across each...
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6814180 |
Monopole-driven underwater sound source
An underwater sound source which comprises a housing having an inner and an outer surface and a monopole driver suspended within the center of the housing. The housing is adapted to receive fluid...
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6639873 |
Marine seismic source
A marine seismic source consists of one or more airguns ( 1 ) suspended from a float ( 2 ). A supply harness ( 5 ) is provided to supply compressed air and electrical control signals to the...
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6612396 |
Controlled-polarization marine seismic shear-wave source
Controlled-polarization marine seismic shear-wave source has a base suitable for positioning on a seafloor, beneath a water body. Twin water-blast tubes (seismic-impulse-generation thrusters) are...
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6612397 |
Shear wave generator
A seismic shear wave generator comprising a seismic wave source ( 3 ) arranged on a base plate ( 11 ) arranged for being placed at the seabed, and a coupling device ( 1 ) arranged for coupling the...
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6578405 |
Gas seep detection
A method of detecting a marine gas seep that includes: deploying a local probe on or near the seafloor; producing bubbles in water near or within the local probe; detecting the bubbles; producing...
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6571906 |
Underwater sound mitigation system for explosive testing
A sound mitigation system and method reduce the transmission of acoustic output from explosions underwater. The system is submerged to bottom terrain of a body of water and has at a series of...
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6570819 |
Low frequency acoustic projector
A reusable low frequency projector system that is capable of producing coherent broadband, high power, low frequency acoustic pressure waves underwater. The projector has two halves each with a...
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6552961 |
Seismic source sensor
A system for detecting source acoustic energy in seismic operations. The system is operable on land and in marine applications. On land, a piezoelectric film is positioned between a vibrator or...
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6470997 |
Apparatus and method for eliminating electrical noise in the fire detect timing signal of an air gun
The invention describes an air gun for use in a marine seismic system. The air gun includes a gun body and shuttle that define a chamber containing a compressed supply of gas. The air gun is...
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6464035 |
Streamlined, readily towable marine seismic energy source for creating intense swept-frequency and pulse-coded signals in a body of water
Streamlined, towable, marine seismic energy vibrator for creating intense swept-frequency and pulse-coded seismic signals in a body of water has a sleek, fish-like configuration designed for towing...
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6408978 |
Non-acoustic self noise canceller for sensor arrays
A device for canceling non-acoustic self-noise associated with mechanically induced vibrations in sensor arrays and associated methods are described. The method utilizes the isolation of a...
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6321868 |
Watertight apparatus capable of being immersed and including an acoustic transducer
The present invention concerns a watertight apparatus capable of being immersed in a liquid, for example a watertight watch, including a case (1) with an inner chamber (10) communicating with the...
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6286612 |
Shutoff valve for marine acoustic generator
A valving system is disclosed which generally comprises a body including an inlet and an outlet where the inlet is disposed in fluid communication with a fluid flow passage and the outlet is...
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6230840 |
Marine vibrator
A marine vibrator has a hollow body formed of one shell or of two opposed shells defining an inner space therein with vibrator apparatus within the hollow body. At least one shell has a curved...
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6173803 |
High amplitude sound wave generator
A method and device for generating a high amplitude sound wave is provided. The device includes a housing having an open end. A piston is slidably disposed in the open end of the housing and forms...
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6148952 |
Hydraulic slotted cylinder source
An apparatus for generating acoustic source energy in a liquid medium. A slotted cylinder has an interior volume filled with a fluid. An actuator selectively pressurizes the fluid to expand the...
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6144618 |
Seismic cable boot and hydrophone retainer
A molded protective body member for seismic cable hydrophone and geophone sensors and their cable splice connections from underwater obstructions and pay-out and retrieval apparatus. The body...
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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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6076629 |
Low frequency flextensional acoustic source for underwater use
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6067709 |
Applying encapsulating material to substrates
Providing encapsulated electronic components on a circuit board by providing dams on a circuit board around areas on which respective electronic components will be mounted, mounting the respective...
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6044038 |
Marine seismic cable system
A marine seismic cable system for marine surveying comprises an electrical conductor within a tubing for conveying compressed air and electricity between a seismic vessel and equipment such as air...
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6001132 |
Preparation of aqueous solutions suitable for finishing cellulose containing textile materials
Aqueous solutions of N-methylol compounds of carboxamides, urethanes, ureas and aminotriazines or of N-methylol ethers of these compounds that are suitable for finishing cellulose-containing...
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5995452 |
System for generating and transmitting acoustic signals underwater
An array system, which provides a unipolar acoustic impulse with a broad spectral response underwater, utilizes a vertical array of airgun or electrical spark sources whose individual peak source...
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5978316 |
Marine seismic source
A seismic acoustic signal source includes a hull that has a wetted surface in contact with a body of water. When underway, the draft of the hull is substantially zero. An acoustic signal generator...
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5959938 |
Tuned bubble attenuator for towed seismic source
An apparatus and method for modifying the seismic source signal from air guns towed behind a marine seismic vessel. At least one conduit is towed behind the vessel to release bubbles into the...
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5951205 |
Amphibious audible alarm device
An amphibious audible alarm device for a diver to use with an air tank in the water or above water surface in the event of incident or emergency to get other people's attention. The device includes...
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5825720 |
Combination seal and wear for an air gun
A wear ring assembly for an air gun includes a support ring having a receiving recess of a first length formed in a surface of an end of the support ring. An elastic ring is adjacent an end of the...
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5825719 |
Dual-port air gun having a single shuttle
A seismic air gun includes a body, a main chamber, two ports, several air passageways, a shuttle, a return device, and a firing device. The main chamber is within the body. The two ports are in the...
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5646910 |
Pneumatic gun for rapid repetitive firing
A pneumatic gun or air gun having a fast-acting sliding valve reciprocable between two axial positions to close or open intake and exhaust ports in a charge chamber in a housing. The sliding valve...
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5646909 |
Pneumatic gun for rapid repetitive acoustic firing
A pneumatic gun having a fast-acting sliding sleeve valve member reciprocating between two axial positions, first to open an exhaust port for the explosive release of gas from a pressurized charge...
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5615170 |
Method, system and apparatus for selectively shutting off leakage of compressed air in marine seismic airgun arrays having common supply hoses for multiple airguns
For marine seismic surveying using an array of airguns towed behind a survey ship, wherein a common high pressure hoseline supplies compressed air to a multitude of airguns, a method, system and...
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5592440 |
Compact sleeve air gun
A sleeve air gun for releasing compressed air into water. The air gun housing has a chamber enclosed with an end cap. The end cap is engaged with the air gun housing with a retainer that is light...
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5592439 |
Self-centering dual shuttle air gun
An air gun for releasing compressed air into the environment. Two opposing shuttle valves selectively open ports to release compressed air more quickly from the air gun. A centering mechanism...
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5572486 |
Seismic airgun arrangement
Seismic airgun arrangement for attenuating unwanted oscillations in the emitted signal. The airgun has one or more outlet ports (9) for exhausting air in a generally radial direction from a central...
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5537364 |
Method and apparatus for conducting seismic surveys from a single well having both seismic sources and receivers deployed therein
Method and apparatus for conducting seismic surveys from a single wellbore utilizing an array of seismic detectors and an seismic source suspended downhole from the detectors on a coiled tubing....
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5475188 |
Device for securing two or more seismic energy sources at fixed relative positions
A device for securing two or more seismic energy sources at fixed relative positions during firing of the sources consists of a rigid framework comprising end frames and intermediate bars. In order...
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5450374 |
Air saving sleeve gun
A seismic source apparatus 10 includes body 12, cap 22, actuator 24, and shuttle 26. Body 12 includes a main chamber 14 that is formed therein and adapted to receive a charge of compressed air....
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5432757 |
Large-diameter, cylinder-shuttle seismic airgun method, apparatus and towing system
A large-diameter, cylinder-shuttle airgun for seismic uses has a cylinder shuttle configured as a hollow, elongated cylinder body of revolution with an inwardly-facing cylinder guide surface and...
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5420829 |
Method and apparatus for modifying the recoil of a marine acoustic generator
The present invention is directed to a method and apparatus for substantially suppressing the undesired recoil derivative from the explosive discharge of high pressure gas from an airgun while...
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