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:
Aug. 08, 1989
Filed:
Mar. 24, 1988
Applicant:
Inventors:
Volker Kruger, Celle, DE;
Heinrich Daenicke, Wienhausen, DE;
Assignee:
Eastman Christensen Company, Salt Lake City, UT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; F16C / ;
U.S. Cl.
CPC ...
175107 ; 175320 ; 384223 ; 415903 ;
Abstract
A direct drive for well drilling tools is established which includes a friction bearing with a trace ring and a bearing ring. The bearing ring has a number of bearing segments distributed around its periphery. These bearing segments are supported so that they can be tilted and shifted axially. Each bearing segment includes a support part mounted in a bore of the bearing ring and a compression spring rod arranged in the bore of the bearing ring to provide tilting and axial shifting of the segment against a spring force.