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| Number | Title | Issue Date |
| 7886866 | System and method for ignition of a gaseous or dispersed fuel-oxidant mixture An improved system and method for ignition of a gaseous or dispersive fuel-oxidant mixture is provided where a gaseous or dispersive fuel-oxidant mixture is supplied to a detonator tube having a fill point and an open end and an igniter placed at an ignition point w... | 02/15/2011 |
| 7882926 | System and method for generating and directing very loud sounds An improved system and method for controlling and directing sound waves is provided. A fuel-oxidant mixture is supplied to at least one detonator having at least one spark initiator. The fuel-oxidant mixture flows through the at least one detonator and into the clos... | 02/08/2011 |
| 6776256 | Method and apparatus for generating seismic waves A method of generating seismic waves in a rock mass surrounding a well comprises the steps of: (a) providing a packer and a fluid withdrawal line within the well, wherein the packer is located below the weathering zone and defines the upper limit of a working... | 08/17/2004 |
| 6705425 | Regenerative combustion device A regenerative combustion device having a combustion zone, and chemicals contained within the combustion zone, such as water, having a first equilibrium state, and a second combustible state. Means for transforming the chemicals from the first equilibrium state to t... | 03/16/2004 |
| 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 gas-generating devices providing volumes of gas that are fed to... | 06/03/2003 |
| 6321838 | Apparatus and methods for acoustic signaling in subterranean wells Disclosed are new apparatus and methods for transmitting and enhancing the propagation of acoustic signals through a well tubing while providing a vent port. The apparatus and methods can be used to control subsurface well tools without wire or line conne... | 11/27/2001 |
| 6260657 | Seismic pulse generator A seismic pulse generator (1) has a chamber (4) pressurised with gas. The generator includes a solenoid valve (60) which can be actuated to cause the release to atmosphere of only a small amount of pressurised gas from a small control chamber (34) behind ... | 07/17/2001 |
| 6250388 | Gas impulse device and method of use thereof A self-firing and self-propelling gas impulse device which includes a housing having a longitudinal axis, a gas inlet port, and one or more gas discharge ports; an inlet chamber, arranged for gas communication with a source of compressed gas via the inlet... | 06/26/2001 |
| 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 device comprises a bubble generator (2) which releases into the... | 07/18/2000 |
| 6076629 | Low frequency flextensional acoustic source for underwater use There is provided an acoustic source especially for use in seismic studies at sea. The acoustic source has a longitudinal axis and sound emitting surfaces adapted to be put into sound emitting movements towards and away from each other by use of a drive u... | 06/20/2000 |
| 6041888 | Low frequency flextensional acoustic source for underwater use Acoustic source, especially for use in seismic studies at sea, with sound emitting surfaces adapted to be put into sound emitting movements toward and away from each other by use of a drive unit in a known manner, in which the sound emitting surfaces comp... | 03/28/2000 |
| 5864517 | Pulsed combustion acoustic wave generator A pulsed combustion acoustic wave generator includes a tubular barrel having an inlet end and an open outlet end, a fuel controller for metering a controlled quantity of fuel into the inlet end of the barrel, an oxidant controller for metering a controlle... | 01/26/1999 |
| 5430691 | Shock wave generator A two-phase shock wave generator including a combustion chamber including a first, combustion, portion having an input port and a second, detonation, portion downstream of the first portion and having an output aperture; an air-fuel supply line, operative... | 07/04/1995 |
| 5229977 | Directional underwater acoustic pulse source A closed-cycle combustion low-frequency acoustic pulse source for use underwater. An elongated combustion chamber, having a first end and a second end and an elongated elastic sleeve, is filled with a stoichiometric mixture of oxygen and hydrogen from an ... | 07/20/1993 |
| 4702344 | Vent means for closed air system impact-type seismic source An impact-type surface seismic source utilizing a closed air system includes a heavy pistons supported above an earth contacting base plate partially within a hollow upstanding cylindrical housing, having a closed top and an open bottom. The housing side ... | 10/27/1987 |
| 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, and on the opposite end by a power-head, the latter a cyli... | 03/03/1987 |
| 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 portion of the entire upper surface of the contact plate. Confi... | 08/26/1986 |
| 4485889 | Valve means for compressed air powered acoustic pulse generator A movable inner cylindrical valve member is rigidly attached to the upper end of an air powered impact projectile designed for striking a target to produce an acoustic pulse. By seating upwardly within the bore of a fixed outer valve member against spaced... | 12/04/1984 |
| 4484657 | Acoustic pulse generator Apparatus for generating an acoustic pulse in a medium wherein an impact piston is driven downwardly along a cylindrical housing by compressed gas to strike a rigid target positioned in contact with the earth. In its firing position, the tapered upper por... | 11/27/1984 |
| 4481612 | Seismic surveying using shear waves The shear wave source of this invention includes a housing and means for applying forces to the shot hole wall. The force applying means applies a number of forces to the shot hole wall along lines normal to a plane close to the shot hole. No pressure wav... | 11/06/1984 |
| 4408676 | Gas gun assembly A gas gun assembly for measuring depths of reflectors in a well bore includes a housing having a central chamber and bottom bulkhead through which a first valve bore extends. Coupling structure is provided to connect the housing to the well. A cap closure... | 10/11/1983 |
| 4402381 | Vehicle mounting and deployment arrangement for seismic source A transportable, acoustic pulse generator is described employing an impact mass suspended above a freely movable target plate positionable on the ground, the impact mass being forceably propelled downwardly to strike the target plate to generate an acoust... | 09/06/1983 |
| 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 latch is driven downwardly by compressed gas to strike a ta... | 08/18/1981 |
| 4284164 | Acoustic pulse generator Apparatus for generating an acoustic pulse in a medium including an upstanding cylindrical housing within which an impact piston supported by retainer springs is adapted to be propelled downwardly by high pressure expanding gas supplied from external high... | 08/18/1981 |
| 4222454 | Bidirectional ground coupling means for inclined seismic source Apparatus for generating combined compressional and shear wave signals in the earth which employs a seismic source, such as a cylindrical gas exploder, having a free-moving wedge shaped base which tapers symmetrically downwardly to a thin blade. When the ... | 09/16/1980 |
| 4148375 | Seismic vibration source A system for vibrating the earth in a location where seismic mapping is to take place, including forming a relatively shallow hole in the earth such as a hole 10 feet deep, placing a solid propellant in the hole, sealing a portion of the hole above the so... | 04/10/1979 |
| 4108271 | Seismic land source A seismic land source for transmitting powerful seismic energy impulses into the earth comprising a dome-shaped bell within which is contained a substantially incompressible liquid and an air gun which can be fired for abruptly releasing pressurized gas i... | 08/22/1978 |
| 4102429 | Apparatus for generating seismic waves A seismic wave generator assembly with self-contained guidance and shock-absorbing means is confined within an elongated, upstanding cylindrical housing which may be lowered into position at the end of a lateral arm or a cable supported from a transport v... | 07/25/1978 |
| 4100991 | Fast cycle seismic gas exploder and method Within a stationary upstanding cylindrical housing, a piston and a base member resting on the ground are separated by an expansible detonation chamber. Means are provided for feeding successive charges of a combustible gas mixture into the chamber at a ra... | 07/18/1978 |
| 4078632 | Land seismic gas detonator The gas detonator is especially adapted for shallow, seismographic, land prospecting. It comprises a circular bottom plate having an inwardly-directed sloping side wall. An annular top plate is mounted over the bottom plate. Means, including a plurality o... | 03/14/1978 |
| 4073363 | Method and apparatus for generating a long sequence of seismic pulses Within the stationary, upstanding cylindrical housing of a rapid fire seismic gas exploder an expansible detonation chamber is formed between a base resting on the earth and a piston adapted to move reciprocally. A plurality of separate external gas entry... | 02/14/1978 |
| 4073362 | Charging and ignition system for gas exploders Within a stationary, upstanding cylindrical housing, a piston and a base member resting on the ground are separated by an expansible detonation chamber. One or more gas inlets communicate with the chamber through which successive charges of a combustible ... | 02/14/1978 |
| 4069004 | Device to emit shock waves, with adjustable capacity This invention concerns a device for emitting shock-waves, with adjustable capacity. Such a device comprises a valve, a barrel with a seat for this valve, barrel and valve being on the same axis, and forming between them an annular combustion chamber, whi... | 01/17/1978 |
| 4043420 | High frequency gas detonator A high-frequency, high-repetition gas detonator is provided which is adapted for shallow seismographic work. The detonator comprises a detonation chamber, a rigid bottom plate adapted to be coupled to the earth, and a top plate positioned over the bottom ... | 08/23/1977 |
| 4026382 | Repetitive detonation seismic surveying method and apparatus This invention describes an apparatus and method for generating seismic waves in the earth for seismic geophysical prospecting. It involves a slender pipe open at the lower end, which can be driven into the earth to a shallow depth. The upper end is close... | 05/31/1977 |
| 4007803 | Expanding detonation chamber multi-shot gas exploder An expandable ignition chamber within an upstanding cylinder is formed between its base and a massive free piston. Initial detonation of a combustible gas mixture within the chamber drives the piston upwardly to expose in sequence a series of vertically s... | 02/15/1977 |
| 4004651 | Means for flexibly guiding the travel of an upwardly propelled weight Arms extending laterally from an upwardly moving weight, such as a rebounding seismic gas exploder, terminate in guide assemblies adapted to engage a plurality of parallel semi-rigid, resilient ropes connected between the top and the bottom of a supportin... | 01/25/1977 |
| 3981379 | Device for emitting mechanical waves This invention concerns a device for emitting mechanical waves in an external medium. This device comprises an annular or axial combustion chamber, shut by a valve, and comprising means of introducing fuel and oxidant, and an ignition system; the valve is... | 09/21/1976 |
| 3976161 | Power auger seismic source Seismic waves are generated by detonating an explosive gas mixture in an earth cavity formed by driving a short earth auger to a desired depth, leaving most of the augered earth in the hole surrounding the auger shaft, and then pulling the auger and shaft... | 08/24/1976 |
| 3958661 | Method and apparatus for generating seismic waves An apparatus for generating seismic waves includes an elongated closed tube with a piston in its internal cavity. The piston is carried by a piston rod which extends through the top of the tube, and includes a fuel inlet and exhaust channel. The piston al... | 05/25/1976 |
