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| Number | Title | Issue Date |
| 7426439 | Method and apparatus for marine seismic data acquisition The present invention provides a method and apparatus for seismic data acquisition. One embodiment of the method includes accessing data acquired by at least two particle motion sensors. The data includes a seismic signal and a noise signal and the at least two part... | 09/16/2008 |
| 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 |
| 7325647 | Mobile system for seismic emission with fixed coupling devices, and method therefor Seismic emission system for use in an underground formation, using at least one seismic source movable successively in a plurality of prepared activation locations and method for implementing same. The system comprises for example a plurality of coupling devi... | 02/05/2008 |
| 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 |
| 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 distal end of the tine is uninhibited; positioning an oscillator so as to ... | 05/15/2007 |
| 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 support structure so that distal ends of the two tines are positioned wit... | 05/08/2007 |
| 7152467 | Parallel seismic depth testing using a cone penetrometer A parallel seismic tester utilizing a cone penetrometer to test the depth of a foundation or the like comprises three important elements: the cone penetrometer which houses a receiver, an impactor to impact the structure, and data gathering and analyzing equipment. ... | 12/26/2006 |
| 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 dimensions of the device, and method of implementation. The device comprises ... | 09/12/2006 |
| 7082831 | Measurement of base and subgrade layer stiffness using bender element technique The present invention relates to a device and method for measuring the stiffness of base and subgrade layers of soil. The device is a penetrometer comprising first and second spaced apart cone penetrometer shafts. A first of the cone penetrometer shafts is fitted wi... | 08/01/2006 |
| 7032707 | Acoustic isolator downhole applications A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined fre... | 04/25/2006 |
| 7028806 | Acoustic isolator for downhole applications An apparatus for performing acoustic investigations while drilling a borehole in a subsurface geological formation comprises a longitudinally extending assembly conveyed in the borehole on a drilling tubular. The assembly and the drilling tubular have a drilling flu... | 04/18/2006 |
| 6951262 | Method and apparatus for suppressing waves in a borehole Methods and apparatus for suppression of wave energy within a fluid-filled borehole using a low pressure acoustic barrier. In one embodiment, a flexible diaphragm type device is configured as an open bottomed tubular structure for disposition in a borehole to be fil... | 10/04/2005 |
| 6915875 | Acoustic isolator for downhole applications A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined fre... | 07/12/2005 |
| 6901865 | Primer casing and method of charging a blasthole Primer casing (1) comprising sleeve portion (5) and leading portion (5a), wherein sleeve portion (5) includes tabs (6) to retain primer (11) and blasthole engagement means (2), and wherein leading portion (5... | 06/07/2005 |
| 6837332 | Method and apparatus for cancellation of unwanted signals in MWD acoustic tools An apparatus (10) and method are disclosed for eliminating a noise signal from at least one source during an acoustic measurement of a subsurface geological formation or borehole. The apparatus (10) includes a longitudinal body for positioning in the b... | 01/04/2005 |
| 6782970 | Acoustic source using a shaftless electrical hammer A shaftless acoustic source is disclosed having a solenoid, a bullet and driving electronics. The bullet, which is positioned inside the solenoid's coil, can be accelerated by a magnetic force generated when a current pulse is applied to the coil. Acoustic energies ... | 08/31/2004 |
| 6619423 | Measuring device for measuring the elastic properties of a surface structure A measuring device for measuring the elastic properties of a surface structure (3), comprising a probe (2) arranged within a housing (1), a transmitter and at least one receiver, the transmitter transmitting acoustic pulses and the receiver picking up the... | 09/16/2003 |
| 6418081 | System for detection of buried objects The present invention discloses a buried object detection system. The detection system has an acoustic emitter capable of generating a non-linear acoustic impulse or a continuous acoustic signal of variable amplitude and frequency. Sensors are deployed on... | 07/09/2002 |
| 6209640 | Method of obtaining improved geophysical information about earth formations The present invention provides a method for forming wellbores. In one method, one or more wellbores are drilled along preplanned paths based in part upon seismic surveys performed from the surface. An acoustic transmitter conveyed in such wellbores transm... | 04/03/2001 |
| 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 |
| 6076630 | Acoustic energy system for marine operations A marine seismic source for generating acoustic source energy. A housing has a continuous exterior perimeter which is moveable to displace water. Movement of the housing can be accomplished by providing alternating convex and concave exterior surfaces con... | 06/20/2000 |
| 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 |
| 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 piston/cylinder relationship. Spaced apart horizontal top... | 05/23/2000 |
| 6065538 | Method of obtaining improved geophysical information about earth formations The present invention provides a method for forming wellbores. In one method, one or more wellbores are drilled along preplanned paths based in part upon seismic surveys performed from the surface. An acoustic transmitter conveyed in such wellbores transm... | 05/23/2000 |
| 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 |
| 5954517 | Interactive sand box for training An interactive sand box or sand table for use in tactical training includes an automated control system and image generator so that infinitely variable visual images may be projected onto the contoured surface of the sand for training and preparation for ... | 09/21/1999 |
| 5811741 | Apparatus for placing geophones beneath the surface of the earth An apparatus for placing geophones beneath the surface of the earth includes a machine frame that supports an elongated probe rod. The probe rod is dimensioned to reach a selected subterranean earth layer. The rod has upper and lower end portions. A geoph... | 09/22/1998 |
| 5646379 | Attentuator for borehole acoustic waves An attenuator for use in attenuating tube waves in a borehole includes a body formed from a permeable material having a rigid matrix which can be saturated with fluid. In its simplest form, the attenuator is one or more cylindrical bodies as part of a bor... | 07/08/1997 |
| 5551881 | Method and system for geophysical and geologic modeling A method and system for using sonography to image the internal structure of geophysical and geologic models are disclosed. The sonography system includes a wand having a plurality of piezoelectric elements at an active surface thereof, each coupled to dri... | 09/03/1996 |
| 5432305 | Penetrometer acoustic soil sensor A acoustic-penetrometer probe and method for determining the presence of materials in a region proximate the penetrometer probe through measurement of reflected acoustic waves, with the probe having a driving head on one end to permit forcing the driving ... | 07/11/1995 |
| 5408441 | Method for seismic exploration in artic regions A method for obtaining seismic data in frigid regions without interference from flexural ice waves. In an exemplary embodiment, seismic data is produced by using an energy source to generate a seismic wave in a floating ice sheet. Seismic disturbances cau... | 04/18/1995 |
| 5373486 | Seismic event classification system In the computer interpretation of seismic data, the critical first step is to identify the general class of an unknown event. For example, the classification might be: teleseismic, regional, local, vehicular, or noise. Self-organizing neural networks (SON... | 12/13/1994 |
| 5170018 | Method and apparatus for tube-wave suppression A device and method for suppressing acoustic tube wave noise in a borehole. The device comprises an absorptive material that is positioned in a borehole so that the device will encounter and absorb the tube waves before the waves are detected by receivers... | 12/08/1992 |
| 5131477 | Method and apparatus for preventing drilling of a new well into an existing well Apparatus and method for noninvasive surface or remote monitoring of activity downhole in a cased bore hole wherein vibrations transmitted through the casing are detected by a vibration transducer coupled to the casing to obtain information about the acti... | 07/21/1992 |
| 5005665 | Piezoelectric seismic vibration device and method A vibrator and method for transmitting seismic signals into the earth to obtain data on various subsurface characteristics. The vibrator is driven with piezoelectric transducers, and can produce better signal resolution at higher frequencies than is possi... | 04/09/1991 |
| 4982381 | Method and device for acquiring and processing signals obtained in wells and particularly in horizontal wells A method is disclosed for acquiring and processing logs obtained by a well-logging tool moved in a well, providing better discrimination between the discontinuities of the sub-soil oriented substantially in the same direction as the well and situated on e... | 01/01/1991 |
| 4850449 | Piezoelectric seismic vibration device and method A vibrator and method for transmitting seismic signals into the earth to obtain data on various subsurface characteristics. The vibrator is driven with piezoelectric transducers which can operate below 500 Hz, and can produce better signal resolution at h... | 07/25/1989 |
| 4833658 | Method of seismic prospecting with very high resolution in horizontal boreholes A method of seismic prospecting with very high resolution as applicable in particular to exploitation of a productive hydrocarbon deposit essentially consists in transmitting and receiving acoustic waves, in recording shot moments, in determining average ... | 05/23/1989 |
| 4649524 | Integrated acoustic network This invention relates to an integrated acoustic network system to provide warning of impending groundfall in underground mines. The system includes a plurality of geophones which derive acoustic signals by which the source of seismic disturbances is loca... | 03/10/1987 |
| 4016942 | Method and apparatus for indicating the position of one well bore with respect to a second well bore A compression wave type signal of a selected frequency is transmitted into the ground at the bottom of a well bore being drilled. The signal is picked up by four microphones that are positioned in another well bore. The microphones have a known orientatio... | 04/12/1977 |
