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7518953 |
Method for detecting air gun faults in a marine seismic source array
A method for determining a fault in a seismic air gun includes comparing a near field seismic signal measured during operation of the air gun to a reference near field signal and determining the...
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7466632 |
Method and apparatus for positioning a center of a seismic source
The present invention provides a method and apparatus for positioning a center of a seismic source. The method includes determining a desired center-of-source of the seismic source and selecting...
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7466630 |
Method for monitoring performance of marine seismic air gun arrays
A method for characterizing function of an air gun includes measuring, with respect to time, a parameter related to pressure in a charge chamber portion of the air gun. The measurements with...
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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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7414920 |
Acoustic generator for distance sounding with microphone designed for efficient echo detection
In the oil industry, the acoustic sounding method is a well-known technique for taking the depth measurements of particular attributes of an oil well or borehole. The method involves sending a...
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7397729 |
Acoustic generator for distance sounding with a new and novel portal structure for the efficient firing of the pressure chamber
In the oil industry, the acoustic sounding method is a well-known technique for taking the depth measurements of particular attributes of an oil well or borehole. The method involves sending a...
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7379391 |
Marine seismic air gun timing
A method for controlling timing error in the firing of an idle seismic air gun comprises the steps of identifying an acceptable range of seismic air gun timing error, and identifying a relationship...
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7359282 |
Methods and apparatus of source control for borehole seismic
A method and apparatus for controlling seismic sources. The method and apparatus enable firing of a seismic sources at either a precise time or a precise position of the seismic source. Controlling...
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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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7321527 |
Method and apparatus for controlling the acoustic output of an airgun
A device including a housing defining a first chamber and a port formed through the housing. A shuttle flange moveably positioned within the first chamber. The shuttle flange moves during a...
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7317662 |
Gas projection device sometimes with a burst disk, producing loud sonic report and smoke plume
Gas Projection Device that can take many external forms that simulate military munitions being exploded and that contain features that enhance the sound of the explosion and the appearance of smoke...
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7269099 |
Air gun
A seismic air gun includes an operating chamber, a firing chamber, a port, and a longitudinally disposed cavity sized and shaped to accept a plurality of wires. A moveable shuttle includes a...
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7228934 |
Acoustic generator for distance sounding with a firing mechanism independent of the pressure equilibration force
In the oil industry, the acoustic sounding method is a well-known technique for taking the depth measurements of particular attributes of an oil well or borehole. The method involves sending a...
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7218572 |
Method of seismic source monitoring using modeled source signatures with calibration functions
Physical parameters are measured for an array of seismic sources, preferably for each activation of the seismic sources. Calibration functions are obtained and the measured physical parameters and...
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7042803 |
Marine seismic source towing apparatus and method
A marine acoustic source system has relativley densely packed energy sources arrayed in a tandem-like fashion along a horizontal plane. Preferably, a longitudinal axis of each source lies...
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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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6873571 |
Digital air gun source controller apparatus and control method
An in-water distributed control system for use in marine seismic survey. The system includes a shipboard interface and power supply coupled to an in-water subsystem via a high bandwidth...
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6870795 |
Acoustic source array system module for underwater operation which can be installed on a motorized boat
A small boat or launch such as a motorized reinforced hull inflatable boat provides a platform for an acoustic source array of airguns. The array is made up as a ladder structure in which the...
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6788618 |
Method and apparatus for marine source diagnostics
A graphical user interface (GUI) and control system for controlling and testing an acoustic source. The control system includes real-time data processing of individual source near-field measured...
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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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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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6570820 |
Pressure balanced inertia solenoid valve
The present invention provides a pressure-balanced inertial valve assembly for use in marine seismic energy sources such as air guns. The valve includes a poppet having a first seal and a second...
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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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6376767 |
Air gun cable
In a cable with a pneumatic hose, a sheath ( 9 ) encloses the hose and conductor elements ( 6 ) which are disposed between the sheath ( 9 ) and the hose. A layer of compressible material ( 5 ) is...
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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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6185156 |
Underwater acoustic impulse source
An acoustic transmission in an underwater environment having a spectrum (amplitude/frequency signature) of interest is generated by cyclically releasing energy which forms impulses which...
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6089345 |
Elastic wave exploration tool for wells
A well tool in accordance with the invention comprises an attenuation device which attenuates tube waves associated with an elastic wave emission and/or reception set (1, 12). The attenuation...
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6072750 |
Method for producing seismic pulses
The method involves using an acoustic wave generating apparatus, such as an "air gun", which employs only a single gas or single gas mixture and which has a gas pressurizable chamber with an inlet...
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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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6026056 |
Method and apparatus for reducing the effect of rough sea surface conditions on marine seismic sources
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5999491 |
Low frequency underwater sound source
An acoustic generating system is described incorporating a bubble generator (1) for forming pressurised gas bubbles and directing the bubbles in a plume from an outlet (7), and a low frequency...
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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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5841733 |
Acoustic source array system for underwater operation
An improved acoustic source array system is provided by the invention to generate acoustic signals underwater. The system has an array of acoustic signal sources, such as air guns, towable while...
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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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5506818 |
Seismic source system utilizing a small diameter hose bundle
This invention is a seismic source system for marine surveying using a small diameter hose bundle containing an electrical cable disposed within an air hose which is reinforced with torque-balanced...
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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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5365493 |
Air gun
The invention provides an air gun responsive to a supply of compressed gas, which facilitates rapid acceleration of a shuttle member to selectively actuate the air gun. The air gun includes a...
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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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5315917 |
Monoport airgun for seismic exploration having discharge port extending continuously for 360 degree around its axis
A monoport airgun for seismic exploration has a single discharge port extending continuously for 360° around its longitudinal axis. This airgun has a first housing providing a firing chamber...
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