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4597464 |
Method and system for well velocity shooting and vertical seismic profiling
A method and system are provided for well velocity shooting and vertical seismic profiling utilizing mobile seismic land sources for transmitting powerful seismic energy impulses into the earth. A...
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4597065 |
Cable for towing air/water guns behind a seismic vessel
A cable for towing air or water guns behind a seismic vessel is constructed with a reinforced air hose in the center region. The air hose (1) is a Kevlar fiber reinforced high pressure air hose...
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4594696 |
Gun cable termination
A means for terminating of splicing a cable intended for towing air-water guns behind a seismic vessel. The end of the cable, or of each cable section, is guided into the housing of the termination...
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4577723 |
Method for improving the efficiency of air guns
A quantity of a solution of a long-chain polymer is injected into the water around an air gun. The resulting dilute solution of the long-chain polymer tends to reduce turbulence surrounding the air...
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4556120 |
Modular gas-powered subsea seismic source
The invention is a device known generically as an "air gun" suitable for producing a shock wave in a subsea environment during seismic prospecting. It is made up of a central chamber holding...
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4552086 |
Float arrangement
The present invention relates to a float which is provided with at least one hoist drum for a hoisting wire from a hoist. The float is provided with at least one suspension drum for a suspension...
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4525813 |
Armored umbilical apparatus for towing a marine seismic air gun sub-array
An armored umbilical and termination housing is disclosed for towing a sub-array of seismic air guns used in marine seismic surveying comprising a single air hose for supplying all the high...
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4511999 |
Gun shot control unit for seismic exploration
A gun shot control unit for a seismic exploration system compensates for the inherent delay between the shot command signal and the actual occurrence of the seismic pulse. A digital clock is...
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4503929 |
Sleeve valve for an air gun having a reciprocating shuttle valve
An air gun of the reciprocating shuttle type includes a split-ring sleeve valve that is expandable against the inner wall of a firing chamber. The sleeve valve encircles the shuttle body. The...
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4500978 |
Seismographic method and apparatus using scaled sound sources
A seismic method and apparatus utilizes two point sound sources located at the same location on the earth to produce sound waves at different amplitudes and times. The reflections of the sound...
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4476553 |
Method of determining the signatures of arrays of marine seismic sources
In order to determine the signature of an array of n seismic sources 21 to 27, for instance marine seismic sources in the form of air guns, the array is actuated and the emitted pressure wave is...
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4472794 |
Sleeve shuttle air gun
A sleeve shuttle air gun is described which can be fired by a solenoid valve without dumping compressed air into the ambient prior to firing, thereby avoiding the generation of premature impulses...
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4427091 |
Fail-safe circuit mechanism for generating a pulse indicating the precise moment of firing of a gas exhausting gun
A new circuit is added to the old electrical circuit including two electrodes underwater positioned very close to a gas exhausting gun gaseous exhaust such as an air gun, wherein the exhaust from...
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4405033 |
Fail-safe methods for generating a pulse indicating the precise moment of firing of a gas exhausting
New methods are disclosed for detecting the instant of firing of a gas exhausting gun such as an air gun which reduce plating action on two closely spaced apart electrodes submerged underwater very...
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4402382 |
Air gun fire time sensor
A robust air gun fire time sensor consists of a housing to which is secured a protruding nonmagnetic internal barrel having a bore. The bore is closed at one end by a magnetic end cap defining an...
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4382486 |
Tuned air gun array
The present invention provides a method for determining the spacing and size of air guns in a tuned air gun array. Volume ratios are calculated based upon a predetermined maximum volume for any...
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4381044 |
Multiple chambered gas powered seismic source
A compressed-gas seismic energy source suitable for underwater prospecting. The device has two gas storage cylinders placed at the opposite ends of a shuttle. The shuttle seals both storage...
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4364446 |
Generating pulses
Methods and devices are disclosed for generating acoustic pulses in a water or land medium, e.g., for use in seismic investigations. The pulse amplitudes, waveshapes, and frequencies can be...
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4353431 |
Recoil reducing system for gas guns
Disclosed herein are improvements in a recoil reducing system of a gas gun which create pulses in a liquid medium by introducing therein gas under high pressure. The release of high pressure gas...
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4324311 |
Actuator for an air gun having a reciprocating shuttle valve
A shuttle valve is slidingly provided within a firing chamber. A shuttle valve actuation control chamber is mounted at each end of the firing chamber. Pressurized air applied to a control chamber...
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4300653 |
Seismic source array firing controller
There is disclosed apparatus for controlling the precise time of firing of each air gun in an array of air guns employed in marine seismic exploration. For each air gun in the array, the apparatus...
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4296827 |
Air-gun fire time sensor
The resistive sensor consists of a pair of electrodes separated by an impervious insulating material. The sensor is mounted adjacent to an exhaust port of an airgun, in the path of the air blast...
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4286687 |
Air gun firing sensor apparatus and system
An air gun firing sensor apparatus and system are provided for determining the instant of firing of an air gun by sensing pressure changes within the air gun when it is being fired. A...
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4285415 |
Acoustic impulse generator
Apparatus for controlling a release of pressurized fluid, to generate an acoustic or shock wave impulse for use in underwater reflection seismic surveys. Compressed air is supplied to the acoustic...
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4284165 |
Acoustic pulse generator
Apparatus for generating an acoustic pulse in a medium including an upstanding cylindrical housing within which an impact piston retained in the upper end of housing by an electrically controlled...
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4271924 |
Airgun apparatus providing high strength and high pressure capabilities
Airgun apparatus are disclosed providing high strength, high pressure and large volume capabilities. An integral high-strength cylindrical housing extends for the full length of the airgun and...
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4246979 |
Internal sleeve air release control apparatus in seismic air gun
Disclosed is a seismic source device, known in the industry as an air gun, having internal sleeve and shuttle control for allowing a predetermined discharge of compressed air into water for...
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4240518 |
Method and apparatus for monitoring and controlling a multiplicity of air guns for seismic surveying
Firing of a seismic source of the type called an air gun is detected by means of a fluid pressure sensor located in the housing of a solenoid actuated control valve. Through a pressurized gas...
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4230201 |
Air release control in seismic energy source air gun
Disclosed is a seismic source device, known in the industry as an air gun, having shuttle control for allowing a predetermined discharge of compressed air into water for purposes of seismic...
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4219097 |
External air release control in seismic air gun
Disclosed is a seismic source device, known in the industry as an air gun, having shuttle and external sliding valve control for allowing a predetermined discharge of compressed air into water for...
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4219098 |
Internal passive air release control apparatus in seismic air gun
Disclosed is a seismic source device, known in the industry as an air gun, having shuttle control for allowing a predetermined discharge of compressed air into water for purposes of seismic...
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4211300 |
Air gun with reciprocating shuttle
An improved air gun consists of an elongated cylindrical housing for containing a volume of compressed air that is closed at each end by end plates. A radially-positioned exhaust port is bored into...
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4095667 |
Portable underwater signalling transducer
A portable underwater signalling apparatus for use by divers having self-contained underwater breathing apparatus (scuba) to signal to other divers as well as surface and underwater vessels. The...
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4049078 |
Marine acoustic pulse train signal generator
An apparatus for generating a series of seismic acoustic pulses in a body of water. The series is characterized by having continuously-variable, non-repetitive time intervals between successive...
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4038631 |
Method for generating and detecting seismic shear wave energy in the earth
A method for generating and detecting seismic shear wave energy in the earth are disclosed useful for determining shear wave velocities in localized regions in the earth at sites where foundations...
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4008784 |
Seismic signal source
A seismic signal source adaptable for use with various types of seismic exploration vehicles which move over land. A signal means forms a seismic signal, and a transfer means transfers the signal...
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3997021 |
Pressurized gas discharging apparatus for use as a down-bore seismic impulse source
Improved pressurized gas discharging apparatus for use as a down-bore seismic impulse source provides a compact, efficient axially stacked assembly of components within a one piece elongated...
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3979140 |
Seismic method for logging position of a deep borehole in the earth
Method and apparatus for logging the position of a deep borehole filled with liquid in the earth, comprising a long, continuous small diameter pipe adapted to be reeled up on a drum mounted on a...
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3896898 |
High frequency seismic source using compressed air
The invention is a seismic source using compressed gas such as air as the source of energy. The compressed gas is stored in a reservoir and is quickly released into a multiplicity of elongated...
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3893539 |
Multiple air gun array of varied sizes with individual secondary oscillation suppression
An underwater seismic source for generating an improved seismic signal employing a spaced array of air guns of different sizes to generate an initial bubble impulse and to suppress the cumulative...
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3800832 |
AIR GUN FIRING ASSEMBLY
A quick action firing assembly for charging and suddenly releasing gas under pressure in a seismic energy generator for offshore subsurface exploration, for example, comprising a hollow, elongated...
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3750097 |
COMPRESSED GAS SEISMIC ENERGY GENERATOR
A compressed gas gun for generating a seismic pulse in water. It has a floating-action piston controlled by an auxiliary piston for releasing a compressed gas charge suddenly. It also shapes the...
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3739869 |
APPARATUS FOR THE ATTENUATION OF NOISE FROM UNDERWATER SEISMIC SOURCES
Vanes are mounted on an air gun or other seismic source apparatus to form smaller radii of the air bubbles generated by the source to increase the bubble resonant frequency to a higher frequency...
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3711824 |
METHOD OF PRODUCING UNDERWATER SEISMIC WAVES AND APPARATUS THEREFOR
A method of producing seismic waves under water is provided. A seismic wave generator is immersed beneath the surface of the water. A continuously varying predetermined command signal is generated...
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3638752 |
SEISMIC SIGNAL GENERATOR
An assembly for creating pneumatic impulses, e.g., forming a seismic signal comprising a casing including a gas differential pressure system defining a main chamber and a smaller control chamber...
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3613824 |
PNEUMATIC ACOUSTIC SOURCE EMPLOYING ELECTROMAGNETICALLY CONTROLLED VALVE
The specification discloses an acoustic source having a chamber for receiving gas. A valve is provided for confining gas under pressure in the chamber. An electromagnet is employed for holding the...
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3612210 |
PNEUMATIC SOUND SOURCE EMPLOYING AN ELECTROMAGNET FOR CONTROLLING ITS RELEASE VALVE
The specification disclosed a pneumatic sound source comprising a pressure chamber for receiving gas and having a controllable valve for opening and closing an outlet port. An electromagnet...
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3602878 |
METHOD AND APPARATUS FOR GENERATING ENHANCED ACOUSTIC WAVES
A plurality of air guns are streamed along a marine traverse, certain of the air guns having different volume capacities to generate acoustic waves having different frequency contents and pressure...
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3601216 |
SYSTEM FOR SUPPRESSING MULTIPLE PULSE IN MARINE SEISMIC SOURCES BY INJECTION OF ADDITIONAL AIR
Apparatus and method for suppressing the initial and subsequent contractions of an air bubble used to generate a seismic signal, wherein the preferred embodiment a source of suppressor air is...
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3572462 |
APPARATUS FOR AND METHOD OF SEISMIC EXPLORATION
Apparatus for use in seismic exploration comprising energy propogating means for directing energy downwardly vertically into an earth formation and means for receiving and recording such energy...
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