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. 18, 2018
Filed:
Mar. 15, 2017
Applicants:
Larry G. Keast, Houston, TX (US);
David A. Mcmahon, Houston, TX (US);
Inventors:
Larry G. Keast, Houston, TX (US);
David A. McMahon, Houston, TX (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 3/02 (2006.01); E21B 19/06 (2006.01); F15B 11/08 (2006.01); F15B 13/04 (2006.01); E21B 19/00 (2006.01);
U.S. Cl.
CPC ...
E21B 3/02 (2013.01); E21B 19/06 (2013.01); F15B 11/08 (2013.01); F15B 13/0401 (2013.01); E21B 19/008 (2013.01);
Abstract
A top drive or a power swivel with a high pressure washpipe and seal assembly receives high pressure drilling fluid from a mud pump and provides high pressure drilling fluid to the drilling fluid side of a dual fluid reservoir. A separating piston in the dual fluid reservoir moves toward the oil side as hydraulic oil is used for lubrication. This dual fluid reservoir with separating piston provides hydraulic oil at drilling mud pressure as required by the set of unique high pressure seals which are continuously lubricated and which generate minimal heat.