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Class Information
Number: 181/121
Name: Acoustics > Geophysical or subsurface exploration > Seismic wave generation > Moving weight
Description: Subject matter wherein the seismic waves are generated by utilizing the kinetic energy of a moving inertial mass.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8689929 Excitation device and method for downhole seismic testing using the same Apr. 8, 2014
8689930 Seismic vibrator having airwave suppression Apr. 8, 2014
8662243 Baseplate dampening pad Mar. 4, 2014
8544594 Coupling structure for resonant gyroscope Oct. 1, 2013
8511421 Acoustic sources Aug. 20, 2013
8371416 Constant holddown weight for vibratory seismic sources Feb. 12, 2013
8342288 Seismic transducers having reduced surface area baseplates and methods of use Jan. 1, 2013
8261875 Seismic transducers and baseplates having external dampeners and methods of use Sep. 11, 2012
8228762 Magnetic mass-lift impulsive seismic energy source including attracting and repulsing electromagnets Jul. 24, 2012
8167082 Seismic transducers having improved polygonal baseplates and methods of use May. 1, 2012
8132641 Seismic wave generating apparatus and method Mar. 13, 2012
8079440 Determining the polarity of movement of an actuator mass in a seismic vibrator Dec. 20, 2011
8061471 Seismic vibrator controlled by directly detecting base plate motion Nov. 22, 2011
7987943 Apparatus and method for generating a seismic source signal Aug. 2, 2011
7926614 Particle motion sensor mounting for marine seismic sensor streamers Apr. 19, 2011
7918307 Accelerated weight drop for use as a seismic energy source and a method of operation thereof Apr. 5, 2011
7841444 Seismic vibrator baseplate Nov. 30, 2010
7813224 Seismic source/receiver probe for shallow seismic surveying Oct. 12, 2010
7650962 Rotary actuated seismic source and methods for continuous direct-push downhole seismic testing Jan. 26, 2010
7628248 Apparatus and method for generating a seismic source signal Dec. 8, 2009
7617908 Downhole seismic source Nov. 17, 2009
7562740 Borehole acoustic source Jul. 21, 2009
7467685 Array seismic fluid transducer source Dec. 23, 2008
7441628 Wellbore signal generator Oct. 28, 2008
7424928 Apparatus, system and method for flexibly coupling sensors to a downhole tool Sep. 16, 2008
7395897 Accelerated weight drop configurable for use as a shear wave seismic energy source and a method of operation thereof Jul. 8, 2008
7377357 Marine seismic acquisition method and apparatus May. 27, 2008
7373976 Well production optimizing system May. 20, 2008
7364008 System for imparting mechanical impulse energy to the ground Apr. 29, 2008
7284636 Accelerated weight drop for use as a seismic energy source and a method of operation thereof Oct. 23, 2007
7252174 Downhole seismic-sonic receiver Aug. 7, 2007
7216738 Acoustic stimulation method with axial driver actuating moment arms on tines May. 15, 2007
7213681 Acoustic stimulation tool with axial driver actuating moment arms on tines May. 8, 2007
7182170 Gerotor and bearing system for whirling mass orbital vibrator Feb. 27, 2007
7178626 Method of seismic evaluation of subterranean strata Feb. 20, 2007
7104357 Device for generating focused elastic waves in a material medium such as underground, and method using same Sep. 12, 2006
6851511 Drive assembly for acoustic sources Feb. 8, 2005
6831877 System and method for determining an azimuth of a seismic energy source Dec. 14, 2004
6561310 Method and apparatus for measuring seismic energy imparted to the earth May. 13, 2003
6488117 Vertical-force vibrator seismic wave source Dec. 3, 2002
6474439 Dipole logging tool Nov. 5, 2002
6394221 Swept impact seismic technique and apparatus May. 28, 2002
6338394 Compact vibrator and seismic monitoring or prospecting method using such a vibrator Jan. 15, 2002
6173803 High amplitude sound wave generator Jan. 16, 2001
6119804 Horizontally polarized shear-wave vibrator seismic source Sep. 19, 2000
6105712 Method for generating seismic shearing waves in a subterranean formation Aug. 22, 2000
6065562 System for imparting compressional and shear waves into the earth May. 23, 2000
5992559 Reversible polarity borehole seismic device for P and enhanced S-wave crosshole testing Nov. 30, 1999
5969297 Pulse generator powered vibrator Oct. 19, 1999
5786537 Vibratory ground-survey system Jul. 28, 1998

1 2 3 4

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