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. 21, 2000
Filed:
Nov. 10, 1998
Applicant:
Inventor:
William C Shafer, Berwick, LA (US);
Assignee:
Oil & Gas Rental Services, Inc., , LA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166377 ; 166 7751 ; 166 851 ; 166380 ;
Abstract
A method and apparatus for destabbing (disassembling) two vertically oriented drill pipe joint sections provides a two part clamp arrangement that holds the assembled joint at their interface. A lower end of the clamp arrangement is tightly clamped to the lower joint so that the upper joint rotates when the two joint are gripped with power tongs or like pipe handling devices and unthreaded or 'destabbed'.