06196350 is referenced by 158 patents and cites 9 patents.

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 instrument. The canisters are at least partially filled with gas after the canisters are lowered into borehole. In another embodiment the invention comprises an apparatus for reflecting tube waves in a fluid-filled borehole which includes a canister having a diameter adapted to enable the canister to be deployed within the fluid-filled borehole, and having an open lower end, and an enclosed upper end with an aperture through the upper end adapted for sealing engagement between said upper end and a conduit.

Title
Apparatus and method for attenuating tube waves in a borehole
Application Number
9/413631
Publication Number
6196350 (B1)
Application Date
October 6, 1999
Publication Date
March 6, 2001
Inventor
James Minto
Houston
TX, US
Agent
E Eugene Thigpen
US
Assignee
Tomoseis Corporation
TX, US
IPC
G01V 1/40
View Original Source