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:
Aug. 05, 2014
Filed:
Mar. 04, 2009
Applicants:
Rocco Difoggio, Houston, TX (US);
Douglas J. Patterson, Spring, TX (US);
Eric B. Molz, Houston, TX (US);
Volker Krueger, Celle, DE;
Inventors:
Rocco DiFoggio, Houston, TX (US);
Douglas J. Patterson, Spring, TX (US);
Eric B. Molz, Houston, TX (US);
Volker Krueger, Celle, DE;
Assignee:
Baker Hughes Incorporated, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 47/10 (2012.01);
U.S. Cl.
CPC ...
Abstract
A stepped reflector on the outside of a bottomhole assembly produces two reflections in response to excitation of a transducer. The velocity of the fluid in the borehole is estimated using the two reflections. Alternatively, a change in the gas content of the borehole fluid is estimated from changes in the electrical impedance of a transducer in contact with the borehole fluid.