The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 2009
Filed:
May. 31, 2006
Applicants:
Douglas J. Patterson, Spring, TX (US);
Xiao Ming Tang, Sugar Land, TX (US);
Alexei Bolshakov, Pearland, TX (US);
Inventors:
Douglas J. Patterson, Spring, TX (US);
Xiao Ming Tang, Sugar Land, TX (US);
Alexei Bolshakov, Pearland, TX (US);
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V 1/52 (2006.01); G01V 1/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
Passive and active suppression of casing signals is used to improve the ability to measure formation velocities. Passive suppression includes the use of a magnet slidably coupled to the casing. Active suppression uses measurement of casing signals to control the output of an electromechanical acoustic transducer which cancels the propagating signal. Feedback control may be provided.