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:
Mar. 09, 2010
Filed:
Jun. 06, 2008
Applicants:
Marvin Gearhart, Fort Worth, TX (US);
Daniel E. Milligan, Willow Park, TX (US);
Howard Smith, Granbury, TX (US);
Dennis L. Naylor, Haslet, TX (US);
Michael Redmond, Arlington, TX (US);
Inventors:
Marvin Gearhart, Fort Worth, TX (US);
Daniel E. Milligan, Willow Park, TX (US);
Howard Smith, Granbury, TX (US);
Dennis L. Naylor, Haslet, TX (US);
Michael Redmond, Arlington, TX (US);
Assignee:
The Gearhart Companies, Inc., Fort Worth, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/01 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a measurement-while-drilling (MWD) tool having a pressure compensation system and reservoir segregated from fluid integration with actuator mechanism lubricants. The MWD tool can also be serviced on the rig floor without the need to drain, reseal and charge the compensation system.