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7562740 |
Borehole acoustic source
The present invention discloses an acoustic borehole source and method of using the source for generating elastic waves through an earth formation that may be used for logging or permanent...
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7467685 |
Array seismic fluid transducer source
An apparatus for generating a seismic signal in a wellbore includes an elongated housing configured to be disposed in the wellbore; a piston slidably disposed in an internal bore in the elongated...
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7441628 |
Wellbore signal generator
Methods and apparatus for generating a signal with a signal generator comprising a tool body disposed in a tubular member. A first and second electromagnets are disposed within the tool body such...
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7424928 |
Apparatus, system and method for flexibly coupling sensors to a downhole tool
A downhole receiver for gathering seismic and sonic data from inside a borehole includes a substantially tubular housing adapted for axial connection to a tool string, and one or more sensors. A...
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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...
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7377357 |
Marine seismic acquisition method and apparatus
A marine seismic source method capable of retaining low frequencies is disclosed. One embodiment of the method comprises a seismic source that generates an up-going wave and first down-going wave...
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7373976 |
Well production optimizing system
A method and system for controlling a producing cycle in a well, during the production cycle, for optimizing production from the well including disrupting fluid in a wellbore with a pulse generator...
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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...
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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...
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7252174 |
Downhole seismic-sonic receiver
A downhole tool for gathering formation data from inside a borehole includes a substantially tubular housing adapted for axial connection to a drill string and multiple sensors coupled to the...
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7216738 |
Acoustic stimulation method with axial driver actuating moment arms on tines
A method for generating acoustic waves, the method having the steps of: extending a tine from a support structure so that a proximal end of the tine is attached to the support structure and a...
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7213681 |
Acoustic stimulation tool with axial driver actuating moment arms on tines
An apparatus for generating acoustic waves, the apparatus having: a support structure; two tines extending from the support structure so that proximal ends of the two tines are attached to the...
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7182170 |
Gerotor and bearing system for whirling mass orbital vibrator
A gerotor and bearing apparatus for a whirling mass orbital vibrator which generates vibration in a borehole. The apparatus includes a gerotor with an inner gear rotated by a shaft having one less...
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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...
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7104357 |
Device for generating focused elastic waves in a material medium such as underground, and method using same
An electromechanical device for generating elastic waves in a material medium such as the subsoil in a frequency range where the wavelengths of the waves generated are great in view of the...
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6851511 |
Drive assembly for acoustic sources
In one embodiment of the present invention, a drive assembly for a seismic land vibrator is provided. The drive assembly comprises at least a first spring element. The first spring element operates...
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6831877 |
System and method for determining an azimuth of a seismic energy source
The present invention provides a system for, and method of determining an azimuth of a seismic energy source. In one embodiment, the system includes a directional assembly having a mount configured...
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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...
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6488117 |
Vertical-force vibrator seismic wave source
A dynamic force transducer for generating vertically oriented compressional forces and motions at the surface of a solid medium. A frame is rigidly coupled in direct contact with the solid medium...
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6474439 |
Dipole logging tool
A logging tool having a tool body, which can be positioned in a fluid-filled borehole, including a receiver section and a dipole transmitter; wherein the dipole transmitter includes a transducer...
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6394221 |
Swept impact seismic technique and apparatus
A method of seismic investigation using the swept impact seismic technique involves measuring the response of a site to be investigated to a series of controlled impact sequences applied at...
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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...
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6173803 |
High amplitude sound wave generator
A method and device for generating a high amplitude sound wave is provided. The device includes a housing having an open end. A piston is slidably disposed in the open end of the housing and forms...
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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...
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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...
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6065562 |
System for imparting compressional and shear waves into the earth
A seismic vibrator system for imparting compressional and shear wave vibrations into the earth has an earth contacting base with a vertical post. A tubular hub is slidably received on the post in a...
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5992559 |
Reversible polarity borehole seismic device for P and enhanced S-wave crosshole testing
A seismic source for crosshole testing comprises a hammer rod supported by axial bearings in the ends of a cylindrical housing. Fasteners attach a down-blow hammer to the hammer rod inside the...
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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...
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5786537 |
Vibratory ground-survey system
A rotary vibrating system is used in surveys of the acoustic properties of the shallow earth. The vibrator itself is of eccentric-mass (or "swinging-weight") form. Coupled to a flywheel, it...
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5717170 |
Swinging-weight vibrator for seismic exploration
Seismic exploration for hydrocarbons may use an eccentric-mass (or "swinging-weight") vibrator as the seismic source. According to the invention, a vibrator undergoes alternate periods of...
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5666328 |
Three axis seismic vibrator
A three-axis seismic vibrator is provided which imparts compressional and shear wave seismic vibrations, either sequentially or simultaneously, into the Earth's surface. The seismic vibrator...
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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...
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5534668 |
Deadweight dropping type wave source
In a bore holes, a plurality of resilient members and plates are piled up alternately to form a laminate, and a deadweight is dropped onto the laminate. The resilient members are deformed due to...
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5483026 |
Rotary seismic shear-wave source
An apparatus and a method for generating seismic waves utilizes a heavy flywheel positioned for rotation in a vertical plane to generate and store energy which is then transferred to the ground....
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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....
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5401919 |
Removable piston bore liner for hydraulically actuated seismic vibrator
A removable bore liner is provided that substantially increases the dependability, flexibility and field-serviceability of seismic vibrators and other hydraulically actuated devices. A method for...
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5382760 |
Seismic well source
The seismic source (5) according to the invention is associated with a drill string (1) linking a drill bit to a surface installation close to the bit. It comprises a closed chamber (6) fastened...
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5331607 |
Sweep frequency vibrator
A sweep frequency vibrator is set forth. It has an elongate cylindrical housing closed at the top and bottom ends. On the interior, there is a reactionary mass fixed to identical upper and lower...
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5309405 |
Methods of employing vibrational energy in a borehole
Methods are provided for making use of an apparatus for generating vibrational energy in a borehole, the apparatus utilizes a mass and a rotary source for suspending the mass in a borehole or in...
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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...
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5233570 |
Low frequency underwater acoustic radiator
Low frequency underwater acoustic radiator apparatus includes an air-trapping chamber with a lower portion open to the water, characterized by a mean density higher than that of water. A closed,...
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5229554 |
Downhole electro-hydraulic vertical shear wave seismic source
A downhole electro-hydraulic vertical shear wave seismic source places the reaction mass internal to the source cylindrical housing and isolates the actuator from the wellbore fluid and pressure....
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5210381 |
Apparatus for generating vibrational energy in a borehole
An apparatus for generating vibrational energy in a borehole including an elongated mass having a surface of diameter less than the borehole, a rotary source for suspending the cylindrical mass in...
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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...
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5159160 |
Downhole seismic energy source
A downhole seismic energy source for use in generating a seismic signal in a borehole including an elongated mass having a generally cylindrical surface of diameter less than the borehole, an...
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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...
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5135072 |
Vibrating seismic source usable notably in wells
A seismic source for emitting vibrations through rotation of a set of eccentric weights. Two pairs of angularly out-of-phase weights (A1, A2 and C1, C2) rotate in the same direction. One pair of...
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5131488 |
Seismic sources
Apparatus is described for placement in a borehole in the earth, which enables the generation of closely controlled seismic waves from the borehole. Pure torsional shear waves are generated by an...
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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...
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5115881 |
Anti-bounce device for a mass striking a target element
An anti-bounce device for a mass striking a target element, with the device including a counter-mass and an arrangement for holding the counter-mass spaced from the mass at a predetermined distance...
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