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Seismic wave generation systems and methods for cased wells

United States Patent

7,916,578
March 29, 2011
View the Complete Patent at the US Patent & Trademark Office
A vibration source (10) includes an armature bar (12) having a major length dimension, and a driver (20A) positioned about the armature bar. The driver (20A) is movably coupled to the armature bar (12), and includes an electromagnet (40). During operation the electromagnet (40) is activated such that the driver (20A) moves with respect to the armature bar (12) and a vibratory signal is generated in the armature bar. A described method for generating a vibratory signal in an object includes positioning the vibration source (10) in an opening of the object, coupling the armature bar (12) to a surface of the object within the opening, and activating the electromagnet (40) of the driver (20A) such that the driver moves with respect to the armature bar (12) and a vibratory signal is generated in the armature bar and the object.
Minto; James (Houston, TX), Sorrells; Martin H (Huffman, TX), Owen; Thomas E. (Helotes, TX), Schroeder; Edgar C. (San Antonio, TX)
Schlumberger Technology Corporation (Sugarland, TX)
12/ 122,671
20090283355
May 17, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT This invention was made pursuant to contract no. DE-FG02-04ER84125 with the United States Department of Energy. The government retains certain rights to the invention.