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:
Jan. 18, 2011
Filed:
Apr. 11, 2007
Applicants:
Paul L. Camwell, Calgary, CA;
Edwin I. Hildebrandt, Calgary, CA;
Andrzej M. Sendyk, Calgary, CA;
Inventors:
Assignee:
XAcT Downhole Telemetry, Inc., Calgary, Alberta, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention applies to the means whereby capacitance changes due to varying temperature and/or pressure in a piezoelectric transducer used for acoustic telemetry in a drilling environment is dynamically offset by modifying one or more parameters associated with the drive or control circuitry of said transducer. The object of the invention is to closely maintain the transducer in a resonant mode, thereby ensuring optimum energy consumption.