1
James Minto: System for generating a seismic signal in a borehole. Tomoseis Corporation, E Eugene Thigpen, February 27, 2001: US06193010 (161 worldwide citation)

The invention is an apparatus for generating a seismic signal in a fluid filled borehole which includes an elongated housing formed from a gas impermeable material and a controlled frequency energy source within said housing. The housing has an external shape which expands and contracts in response ...


2
James Minto: Apparatus and method for attenuating tube waves in a borehole. Tomoseis Corporation, E Eugene Thigpen, March 6, 2001: US06196350 (158 worldwide citation)

In one embodiment the invention comprises a method of gathering borehole seismic data in which a borehole acoustic instrument is lowered into a borehole in the earth's surface along with a canister positioned about the instrument and a second open bottomed canister positioned below the instrume ...


3
John K Washbourne: System for eliminating headwaves in a tomographic process. Tomoseis Corporation, E Eugene Thigpen, July 31, 2001: US06269310 (156 worldwide citation)

The invention comprises a method for processing crosswell seismic data from a region of the earth's subsurface generated by transmitting a seismic signal from a plurality of source positions within at least one borehole within said region and detecting said seismic signal at a plurality of rece ...