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| Number | Title | Issue Date |
| 7395897 | Accelerated weight drop configurable for use as a shear wave seismic energy source and a method of operation thereof The present invention provides an accelerated weight drop for use as a seismic energy source, a method for operating an accelerated weight drop for use as a seismic energy source, and a seismic survey system including the accelerated weight drop. The accelerated wei... | 07/08/2008 |
| 7388811 | Method for separating microseismic signals from seismic signals emitted by one or several sources This invention is a method of separating induced microseismicity signals from seismic signals acquired within active seismic monitoring operations carried out in underground zones under development which has application for monitoring of underground hydrocarbon or f... | 06/17/2008 |
| 7364008 | System for imparting mechanical impulse energy to the ground The invention relates to an apparatus and method for imparting a precise amount of impulse energy to be delivered to the ground. The apparatus includes an anvil for operative deployment against the earth a hammer operatively connected to the anvil for striking the a... | 04/29/2008 |
| 7331553 | Bottle support of compressed-air bottles An apparatus for supporting a compressed-air bottle. The apparatus has a bottle support, a plurality of glide inserts projecting away from the bottle support and engageable with a compressed-air bottle supported on the apparatus, and a tightening strap for exerting ... | 02/19/2008 |
| 7299897 | Hydraulic platform lift incorporating positive displacement valve, and positive displacement valve for hydraulic platform lift A hydraulic platform lift, having hydraulic pump means and first and second hydraulic cylinders each having a piston member therein, each operatively coupled to a respective side edge of a platform to permit raising and lowering of the platform. A positive displacem... | 11/27/2007 |
| 7284636 | Accelerated weight drop for use as a seismic energy source and a method of operation thereof The present invention provides an accelerated weight drop for use as a seismic energy source, a method for operating an accelerated weight drop for use as a seismic energy source, and a seismic survey system including the accelerated weight drop. The accelerated wei... | 10/23/2007 |
| 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 shuttle flange within the operating chamber at one end and a firing shuttle... | 09/11/2007 |
| 7255196 | Windshield and sound-barrier for seismic sensors A system and method for reducing acoustic, wind or other background noise that may interfere with sensing of a seismic signal is provided. More specifically, a shield is provided to enclose a geophone and thereby protect it from harmful noise. The shield may compris... | 08/14/2007 |
| 7178626 | Method of seismic evaluation of subterranean strata A method of conducting seismic evaluation of a subterranean formation wherein a rigid, elongate member having a first end and a second end is positioned such that the first end of the elongate member is at a point on the earth's surface, imparting an impulsive force... | 02/20/2007 |
| 7089777 | High speed pneumatic accelerator A pneumatic testing apparatus is provided for accelerating a mass. The apparatus has a housing defining a reservoir and a cylinder having an opened proximate end and a closed distal end. The opened proximate end is positioned within the reservoir and a piston is pos... | 08/15/2006 |
| 7063144 | Acoustic well recovery method and device An electro acoustic device and related method for increasing the production capacity of wells that contains oil, gas and/or water is disclosed. The electro acoustic device is submerged in the well producing zone, and includes an electric generator, one or more elect... | 06/20/2006 |
| 7059403 | Electroacoustic method and device for stimulation of mass transfer processes for enhanced well recovery An electro acoustic device and related method increase production capacity of wells that contain oil, gas and/or water. The electro acoustic device produces vibrations stimulating occurrences of mass transfer processes within the well. The resultant acoustic flow ge... | 06/13/2006 |
| 6904994 | Horizontal transmission and oil system for telehandlers A power train arrangement having a prime mover and a transmission coupled to the prime mover for driving a cooling system with the prime mover through the transmission. The transmission is positioned intermediate to the prime mover and the cooling system in a manner... | 06/14/2005 |
| 6823262 | Method for conducting seismic surveys utilizing an aircraft deployed seismic source The invention comprises the generation of seismic signals at a survey site at which seismic sensors are deployed by dropping mass units from an overflying aircraft. The mass units will impact the earth's surface at said survey site to generate seismic signals. The s... | 11/23/2004 |
| 6561310 | Method and apparatus for measuring seismic energy imparted to the earth A non-contact vibrometer is employed to measure seismic energy imparted to the earth by a land vibrator. The non-contact vibrometer can be a laser vibrometer operable to measure the motion of a baseplate of the land vibrator. A computing device can be use... | 05/13/2003 |
| 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 with minimum drag. The vibrator has a streamlined hollow ... | 10/15/2002 |
| 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 vibration reference via digital beamforming to non-acoustic wavenu... | 06/25/2002 |
| 6338394 | Compact vibrator and seismic monitoring or prospecting method using such a vibrator Compact vibrator for emitting elastic waves in a material medium such as the subsoil. The vibrator comprises a baseplate (3) intended to be coupled in operation with a surface of this medium, an inertia mass (5) and at least a pair of electromechanical tr... | 01/15/2002 |
| 6119804 | Horizontally polarized shear-wave vibrator seismic source A dynamic force transducer for generating horizontally oriented shear forces and motion at a surface of a solid medium. A rigid frame is placed in direct contact with the surface of the solid medium. At least one pair of identical dynamic-force driver uni... | 09/19/2000 |
| 6105712 | Method for generating seismic shearing waves in a subterranean formation Method for generating seismic intersection waves in an underground formation, wherein poles that are previously driven into the formation for other purposes or poles that are driven down for this purpose, said poles being used as a transfer medium for the... | 08/22/2000 |
| 5969297 | Pulse generator powered vibrator An apparatus for generating signals and energy for transmission to a large mass. The apparatus incorporates a pulsed generator such as a compensated pulsed alternator for storing and for discharging large amounts of energy in a controlled manner for trans... | 10/19/1999 |
| 5554829 | Land seismic acoustic source An apparatus and method for generating a seismic signal in the earth consisting of positioning a force-modulating means on the surface of the earth and then positioning a vehicle such that at least some of the weight of the vehicle is supported by the for... | 09/10/1996 |
| 5412623 | Multivibrator waveform monitoring system A multivibrator waveform monitoring system uses a plurality of seismic energy sources for giving vibrations to strata and a prospector, connected to a geophone, for measuring reflected vibrations. Each of the plurality of seismic energy sources includes a... | 05/02/1995 |
| 5396029 | Vehicle-carried vibrator for producing seismic vibrations A vibrator for producing seismic vibrations in the earth is carried by a vehicle. The vibrator has a base plate, a reaction mass and support plates and a lifting and lowering apparatus for raising and lowering the vibrator between a raised transportation ... | 03/07/1995 |
| 5273127 | Air cushion vehicle ride control system A simple and low maintenance Ride Control System (RCS) for Air Cushion Vehicles (ACV) is presented. This RCS reduces the effect of water wave generated pressure pulses on ACV ride by venting the pressure pulses from the pressurized supporting gas cushion ... | 12/28/1993 |
| 5252785 | Broad band seismic vibrator A broad band seismic vibrator includes a hydraulically-operated actuator with a piston shaft depending from the actuator. A spherical member or ball is secured to an end of the shaft and received in a socket provided in an anvil. The spherical member or b... | 10/12/1993 |
| 5187331 | SH wave generator The SH wave generating apparatus includes a driving plate (1) of increased rigidity; a fixing device (6) provided on the bottom of the driving plate for fixing the driving plate onto the earth's surface; a plurality of hydraulic actuators (2) mounted on t... | 02/16/1993 |
| 5181580 | Cyclical variable aperture valve for air cushion vehicles A simple, low cost, and reliable, normally cyclic, fluid control valve that in preferred configuration includes one or more rotary valve elements where such valve elements have openings that align with each other and/or with a flow passageway thus forming... | 01/26/1993 |
| 5154254 | Mass retrieval for acoustic pulse generator A method and an apparatus for mass retrieval for an acoustic pulse generator are disclosed herein. In an impulse type seismic generating apparatus an air spring, mechanical spring, controlled pressurization of an air spring or other energy storage medium ... | 10/13/1992 |
| 5128900 | Multi-component seismic vibratory source for use in marine environments The method and apparatus for providing elliptical polarized shear waves in a marine environment in which a shear wave source penetrates the surface sediment of a water bottom includes dual actuator/reaction mass system mounted inside a structural ring of ... | 07/07/1992 |
| 5128906 | Deep penetrating shear-wave seismic vibratory source for use in marine environments A method and apparatus for providing shear waves in a marine environment in which a shear wave source penetrates the surface sediment of a water bottom. The shear wave generating source includes an actuator/reaction mass system mounted inside a structural... | 07/07/1992 |
| 5031718 | Method and apparatus for generating seismic energy in transition zones Method and apparatus for generating seismic energy in offshore areas includes energy propagating means for directing energy downwardly vertically into an earth formation. A carrier contains an elongated rigid coupler means that extends from the carrier at... | 07/16/1991 |
| 5000285 | Apparatus for imparting seismic signals into the earth Seismic signal generating apparatus of the impact type that includes a signal generator having an impact mass therein, a base plate or coupling member that is engaged by the impact mass to generate the signal, a housing attached to the generator that enci... | 03/19/1991 |
| 4980874 | Method and apparatus for maximizing seismic shear wave production An apparatus and method for maximizing the shear wave energy imparted into the soil upon the impacting of a base plate by an impact mass from a seismic generator. A seismic generator is disposed at an angle relative to a line generally perpendicular to th... | 12/25/1990 |
| 4959818 | Apparatus for generating elliptically polarized shear waves Apparatus for generating a controlled parameter elliptically polarized shear wave into an earth medium. The apparatus consists of a baseplate for engagement with the earth medium in omni-directionally resistant manner and a reaction mass and actuator asse... | 09/25/1990 |
| 4922472 | Apparatus for inducing elliptically polarized shear waves in an earth medium The present invention relates to a method for generation of elliptically polarized shear waves in an earth medium using two shear wave vibrators engaged to the earth medium in cross-polarized attitude and driven at sweep rates having variable phase displa... | 05/01/1990 |
| 4921067 | Self-propelled percussion unit and method of using same A wheeled, self-propelled tractor has a percussion tool or hammer mounted on its forward end and an impact transmitting means carried on the tractor below the hammer. In accordance with one aspect of the invention, the impact transmitting means comprises ... | 05/01/1990 |
| 4871045 | Telescoping tube omni-directional shear wave vibrator Apparatus including transportation structure for generating elliptically polarized shear waves in soft earth medium. A suitable carrier includes a jack assembly for transporting shear wave apparatus that includes a telescoping tube for earth engagement. T... | 10/03/1989 |
| 4867096 | Tubular shear wave source A device for generating elliptically polarized shear waves for introduction into a soft earth medium including marshy and water-covered earth surfaces. The device consists of a shear wave generator coupled to a coupling tube having a conical lower end tha... | 09/19/1989 |
| 4855967 | Seismic vibrator hold-down weight monitor/controller The disclosure relates to a seismic vibrator having an airbag isolator, a transducer for monitoring the instantaneous air pressure within the airbags, a summer to add the pressures within each air bag and a calibrated weighting network to convert the comp... | 08/08/1989 |
