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:
Nov. 10, 1998
Filed:
Dec. 20, 1996
Gunther von Gynz-Rekowski, Houston, TX (US);
Pegasus International Inc., , KY;
Abstract
A non-rotating drill pipe/casing protector is disclosed. The protector has a bi-directional thrust bearing which can be mounted uphole or downhole from the protector. The bi-directional thrust bearing comprises a female and male part where the female is fixed to the tube and the male can relatively rotate with respect to the pipe. The protector has an insert which extends longitudinally out of the sleeve and is used as the male component in the thrust bearing. Thrust loads are absorbed by metallic component contact, thereby eliminating edge wear of the non-rotating sleeve. The thrust bearing components may have wear pads that are replaceable. Roller bearings can also be used to facilitate the relative rotation between the drillpipe and the sleeve. Wear pads can also be employed on the outside of the sleeve to increase its life.