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:
Jun. 23, 2015
Filed:
Oct. 28, 2009
Applicants:
Ingolf Wassermann, Hannover, DE;
Fang Zhang, Shanghai, CN;
Thomas Kelch, Niedersachsen, DE;
Levin L. Bong, Hannover, DE;
Sven Krueger, Niedersachsen, DE;
Inventors:
Ingolf Wassermann, Hannover, DE;
Fang Zhang, Shanghai, CN;
Thomas Kelch, Niedersachsen, DE;
Levin L. Bong, Hannover, DE;
Sven Krueger, Niedersachsen, DE;
Assignee:
BAKER HUGHES INCORPORATED, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/02 (2006.01); E21B 7/06 (2006.01); E21B 47/024 (2006.01);
U.S. Cl.
CPC ...
E21B 7/068 (2013.01); E21B 47/024 (2013.01);
Abstract
Measurements made by a rotating sensor on a bottomhole assembly are used to determine the toolface angle of the BHA. The method includes using a phase locked loop (PLL) to determine a phase difference between the sensor output and a reference signal.