Matches 51 - 100 out of 164 < 1 2 3 4 >
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5263007 Seismic energy source  
A seismic energy source for producing pressure pulses is disclosed. The source contains a substantially symmetrical main chamber for storing compressed fluid. Two shuttles adapted to abut against...
5228010 Seismic energy source air gun  
A shuttle air gun for generating an acoustic output for seismic testing having improved wear rings and seals is provided. The composition of the wear rings includes polytetrafluoroethylene. The...
5212669 Remote cut-off valve  
A control valve for use in geophysical surveying is disclosed. The valve contains a housing having a through bore intersecting with a fluid path. The fluid passes from an input port to an output...
5185726 Continuously-filled floatation apparatus  
The invention provides a floatation apparatus for maintaining a longitudinal object at a constant depth below the water surface in a body of water. Several airtight chambers are connected in a...
5164922 Device for firmly holding seismic means, especially sources of seismic energy  
In seismic surveys at sea, with seismic devices, especially sources of seismic energy being towed behind a vessel and kept at a mutual configuration relative to each other, and with the devices...
5157636 Method of towing sources of seismic energy behind a vessel, and an arrangement for use in the method  
In towing sources of seismic energy behind a vessel, especially in connection with seismic surveys in waters which are covered with ice, the buoyancy floats and also the sources of seismic energy...
5144588 Apparatus and method for use in marine seismic surveying  
The invention provides a seismic transmitter source system which includes a floatation device that contains a plurality of air tight chambers in a serial connection. A separate one way check valve...
5144596 Marine acoustic source  
A compact, marine acoustical source is disclosed. More specifically, the present invention relates to a marine acoustical source capable of producing a strong primary pulse while substantially...
5142509 Seismic device  
A sleeve for a seismic air gun exhaust chamber is disclosed. The sleeve prevents water from accumulating in the air gun exhaust chamber when the air gun is vertically positioned and provides a...
5089668 Towable buoyant streamer for data bearer  
A towed streamer having a buoyant core, a data bearer layer surrounding the buoyant core, an inner jacket layer formed of a resilient material surrounding the data bearer layer, and an outer jacket...
5051966 Fastening means for seismic equipment  
A fastening device for fixing seismic circular devices is designed with a rigid, split, annular clamp (4) with an open void facing the seismic device (1) for insertion of at least one shock...
5046054 Apparatus for distributing lubricant to air guns in a single airline air gun subarray  
The invention is an apparatus for distributing a lubricant to the air guns in a single airline seismic air gun subarray which utilizes an air-lubricant mixture to operate and lubricate the air guns...
5001679 Dual shuttle air gun  
A dual shuttle air gun for generating maximum acoustic output for seismic testing having a housing with an air chamber formed therein and a chamber opening that opens 360 degrees around the...
4993001 Method and apparatus for converting tube waves to body waves for seismic exploration  
Method and apparatus for converting tube waves into body waves downhole for seismic exploration are disclosed, comprising a rotary valve tube wave source for producing swept frequency tube waves...
4976333 Method for reshaping acoustical pressure pulses  
The present invention is directed to a method of modifying or reshaping the acoustical signature created by the explosive, underwater release of a highly pressurized gas. More specifically, the...
4970046 Marine seismic source frame  
An apparatus for positioning a plurality of marine seismic sources in an array. The marine seismic sources are retained in retaining means which are mounted to a frame so that each source is...
4961175 Low frequency sound source for acoustic sweeps  
An underwater acoustic generator comprising a tapered solid positioned in a luid flow to produce a cavitation void. A source of gas supplies the void with gas to produce a resonant gas bubble.
4960183 Seismic source firing control system  
A firing system for marine seismic sources 14 grouped and fired in subarrays 18. Each source 14 is provided with a firing circuit 30 including an energy storage device, such as a storage capacitor...
4949315 External bubble-suppression method and apparatus  
The novel method substantially reduces the pressure pulse, generated by a first radial motion of a body of water, by changing the radial motion into axial motion. The change from radial motion into...
4921068 Internal bubble-suppression method and apparatus  
The present invention comprises an apparatus and method for producing a high resolution acoustic signal from a single point source while achieving a commercially acceptable secondary bubble...
4868794 Method of accumulation data for use in determining the signatures of arrays of marine seismic sources  
In order to accumulate data from which the signature of an array of n interacting seismic sources 21 to 27, for instance marine seismic sources in the form of air guns, can be determined, the array...
4858205 Multi-barrel air gun module  
The present invention comprises a multi-barrel seismic source air gun module for use in a marine environment, preferably comprising a plurality of air gun barrels symmetrically disposed in a single...
4852071 Air supply valve for seismic air gun  
A marine seismic array wherein each air gun in the array is provided with an air supply valve that can be closed remotely to inactivate a particular air gun and then reopened upon command to...
4835746 Device for producing soundwaves in water  
An apparatus for producing acoustic waves in water through sudden ejection of liquid mass from a tubular main housing. A first shuttle and second shuttle are slidably mounted inside the main...
4798261 Small powerful hydro gun  
An uncomplicated, easy to operate, relatively inexpensive, compact and powerful acoustical source hydro gun for use in a liquid environment is particularly effective in a multiple array for marine...
4779245 Long-life, low-maintenance air gun/hydro gun  
A long-life, low-maintenance air gun/hydro gun includes a one-piece, integral shuttle having an unusually long hollow shank with a firing piston whose configuration is the mirror image of the...
4775027 Seismic sound source  
The volumetric capacity of the firing chamber of an air gun is discretely quantized by mounting unit-volume inserts interiorly of the firing chamber.
4774696 Airgun valve with slidable valve seat  
A dual chamber seismic air gun which discharges both chambers simultaneously to counterbalance the reactive forces generated by the discharges. The chambers are symmetrical within the housing of...
4757482 Modular airgun array method, apparatus and system  
A plurality of submerged control station junction boxes each include a microprocessor having data storage and transmission capability, airgun firing and related electronic circuits to control a...
4754443 Airgun having shaft-bearing-guided shuttle and capable of fast repitition self-firing  
An airgun impulsive energy source has an elongated shaft bearing surrounding the shaft of the reciprocatable shuttle for guiding the shuttle and preventing its operating or firing pistons from...
4739859 Method and apparatus for reducing the stretch of an elastomeric diaphragm of a land seismic source  
A land seismic energy source is provided having a rigid dome-shaped bell containing a substantially imcompressible liquid and an airgun for abruptly releasing pressurized gas into the liquid for...
4733382 Pneumatically-operated liquid slug projector apparatus  
The liquid slug projector apparatus is entirely pneumatically operated. It comprises a generator having a main housing whose main port fluidly communicates with a liquid body. A first shuttle and a...
4723230 High ambient liquid pressure-resistant electrical connector  
A high ambient liquid pressure-resistant electrical connector is shown with an airgun having a solenoid actuated valve mounted on the airgun. A multi-conductor electrical cable is connected by this...
H000435 Acoustic source  
An acoustic source is provided where a high pressure fluid is used to positively control the period an exhaust valve is open. High pressure fluid is introduced to the control chamber at a...
4715023 Coaxial, dual chamber seismic air gun  
A dual chamber seismic air gun which discharges both chambers simultaneously to counterbalance the reactive forces generated by the discharges. The chambers are symmetrical within the housing of...
4712641 Method and system for generating shear waves and compression waves in the earth for seismic surveying  
A seismic source is disclosed which is particularly useful for generating horizontally polarized shear waves in the earth for seismic surveying. It comprises an elongated, hollow, substantially...
4713800 Seismic air gun  
A seismic air gun has a passage between the stem of its shuttle and a baffle, whereby ambient pressure can reach the back of the operating piston. The gun is fired by dumping a small quantity of...
4712202 Method and apparatus for converting an air gun into a hydro gun for marine seismic impulse generation  
A marine air gun is advantageously converted into a hydro gun by substitution of two clamp rings and by convenient addition of various parts, allowing normal air gun firing by triggering with usual...
4686660 Assembly for use in seismic surveys of the sea bed  
An assembly for use in seismic surveys of the sea bed is towed behind a vessel and comprises groups of seismic signal transmitters which are towed through the water, being suspended from float...
4667766 Seismic pulse generator  
A seismic acoustic source for generating acoustic pulses in both solid rock and sedimentary layers on land and in both water, rock and sedimentary layers at sea comprises: two chambers; a high...
4658387 Shallow water seismic energy source  
An apparatus and method for generating a shock wave in water comprising a housing capable of containing compressed gas, attachment means fastened to the housing by which the apparatus is oriented...
4658384 Method for determining the far-field signature of an air gun array  
The far-field pressure signature of an air-gun array is derived from near-field measurements. An array of air guns is deployed in the water at a desired depth. A hydrophone is suspended in the...
4648479 Multiple-port, multiple-chamber, tuned air-powered subsea seismic source  
The invention is a multi-port, multi-chamber, tuned, air-powered subsea seismic source. It is suitable for producing a seismic wave in a subsea environment during seismic prospecting....
4646871 Gas-gun for acoustic well sounding  
In the art of acoustic well sounding a gas-gun for the sudden discharge of a measured quantity of compressed gas, comprised of two chambers, viz. a discharge chamber closed at one end by a poppet,...
4644507 Scaling of sound source signatures in underwater seismic exploration  
The invention relates to a method of determining the location in the earth of sub-surface boundaries and/or the acoustic properties of sub-surface features substantially in the absence of the far...
4632213 Seismic source system for use in water covered area  
Apparatus for forming a downwardly directed beam of acoustic wave energy in a body of water, comprising a source of acoustic wave energy such as a water gun, supported at a selected depth in the...
4623033 Air release in seismic source air gun  
A seismic energy source air gun has a body with an air chamber formed therein that opens 360 degrees around the periphery of the body. A sleeve-type shuttle covers the opening in a pre-fire...
4618024 Moving seismic source system for use in water-covered areas  
A moving seismic source system for the use in water-covered areas comprising a conventional source and streamer cable means with multiple receiver, and additionally includes between the source and...
4608675 Land seismic source method and apparatus  
An air gun is mounted in a reaction mass having an impulse-transmitting ground-contact plate movably mounted below the mass. This mass is in face-to-face contact with the plate over the major...
4599712 Modular airgun array method, apparatus and system  
A plurality of control station, watertight, submerged junction boxes are towed at spaced positions located along an airgun array, each junction box for including a microprocessor and data storage...
Matches 51 - 100 out of 164 < 1 2 3 4 >