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:
Apr. 14, 1987
Filed:
Jan. 28, 1986
Applicant:
Inventor:
Bela Geczy, Orange, CA (US);
Assignee:
Smith International, Inc., Irvine, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; F16C / ;
U.S. Cl.
CPC ...
175 92 ; 175107 ; 384271 ;
Abstract
A bearing structure including first and second tapered bearing surfaces for accommodating on-bottom and off-bottom thrust and radial forces on a drive shaft in a down hole drilling environment and further including a radial bearing mounted between the first and second tapered bearings for restricting bending of the drive shaft.