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Class Information
Number: 181/106
Name: Acoustics > Geophysical or subsurface exploration > Well logging > Seismic wave generation
Description: Subject matter including means for generating acoustical waves mechanically in the shaft.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8669881 Container data center with earthquake protection function Mar. 11, 2014
8634272 Televiewer image wood-grain reduction techniques Jan. 21, 2014
8511421 Acoustic sources Aug. 20, 2013
8400872 Seismic source which incorporates earth coupling as part of the transmitter resonance Mar. 19, 2013
8353383 Water motion powered seismic energy source and method for seismic surveying therewith Jan. 15, 2013
8307941 Seismic gun assembly for shooting into a bore hole Nov. 13, 2012
8261873 Electromagnetic linear drive source for logging-while-drilling/wireline acoustic applications Sep. 11, 2012
8243550 Downhole communication method and system Aug. 14, 2012
8220583 Acoustic isolator section Jul. 17, 2012
8104568 Seismic gun assembly for shooting into a bore hole Jan. 31, 2012
7997380 Low frequency acoustic attenuator Aug. 16, 2011
7987943 Apparatus and method for generating a seismic source signal Aug. 2, 2011
7916578 Seismic wave generation systems and methods for cased wells Mar. 29, 2011
7823689 Closed-loop downhole resonant source Nov. 2, 2010
RE41829 Nonlinear electroseismic exploration Oct. 19, 2010
7789141 Oil recovery enhancement method Sep. 7, 2010
7660194 Microseismic fracture mapping using seismic source timing measurements for velocity calibration Feb. 9, 2010
7650963 Acoustic isolator for well logging system Jan. 26, 2010
7628248 Apparatus and method for generating a seismic source signal Dec. 8, 2009
7617908 Downhole seismic source Nov. 17, 2009
7578359 Downhole acoustic source Aug. 25, 2009
7539279 Logarithmic spectrum transmitter waveform for controlled-source electromagnetic surveying May. 26, 2009
7529151 Tube-wave seismic imaging May. 5, 2009
7460435 Acoustic transducers for tubulars Dec. 2, 2008
RE40475 Source waveforms for electroseismic exploration Sep. 2, 2008
7420879 Device for seismic emission in an underground formation and method for implementing same Sep. 2, 2008
7414918 Method for normalizing signals in a cement bond logging tool Aug. 19, 2008
7382684 Method for selective bandlimited data acquisition in subsurface formations Jun. 3, 2008
7336562 Sonic logging tool including receiver and spacer structure Feb. 26, 2008
7277358 Apparatus, method and system for digitally transmitting acoustic pulse gun signals Oct. 2, 2007
7228934 Acoustic generator for distance sounding with a firing mechanism independent of the pressure equilibration force Jun. 12, 2007
7216737 Acoustic isolator between downhole transmitters and receivers May. 15, 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
7102961 Installation of seismic survey devices in shallow, low-angle boreholes Sep. 5, 2006
6985086 Method and apparatus for LWD shear velocity measurement Jan. 10, 2006
6985815 Instantaneous spectral analysis Jan. 10, 2006
6930616 Method and apparatus for LWD shear velocity measurement Aug. 16, 2005
6909666 Method and apparatus for generating acoustic signals for LWD shear velocity measurement Jun. 21, 2005
6850168 Method and apparatus for LWD shear velocity measurement Feb. 1, 2005
6837332 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools Jan. 4, 2005
6834743 Wideband isolator for acoustic tools Dec. 28, 2004
6820716 Acoustic isolator for well logging system Nov. 23, 2004
6795373 Permanent downhole resonant source Sep. 21, 2004
6747914 Use of minor borehole obstructions as seismic sources Jun. 8, 2004
6705425 Regenerative combustion device Mar. 16, 2004
6671224 Active reduction of tool borne noise in a sonic logging tool Dec. 30, 2003

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