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:
Sep. 28, 1993
Filed:
Feb. 14, 1992
Applicant:
Inventors:
Raymond S Livingston, Nisku, CA;
David P Kutinsky, Nisku, CA;
Assignee:
Canadian Downhole Drill Systems, Inc., Nisku, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; F16C / ;
U.S. Cl.
CPC ...
384 97 ; 175107 ; 384613 ;
Abstract
A mud motor bearing assembly is disclosed for an oil-lubricated downhole drill mud motor. A number of parallel sets of angular contact ball bearings are located between the mandrel and the bearing housing in a sealed, oil-filled chamber to provide all compressive thrust load bearing, extension thrust load bearing and radial load bearing capacity. Oil filled pistons at each end retard the progress of mud contamination into the inside of the chamber containing the ball bearings.