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. 13, 1996
Filed:
Nov. 18, 1994
Applicant:
Inventors:
Richard McEwen, Coyle, OK (US);
Darrel W Sparks, Perry, OK (US);
Assignee:
The Charles Machine Works, Inc., Perry, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175 57 ; 166 7751 ; 166377 ; 166380 ; 173164 ; 175320 ;
Abstract
A mechanism (10) is disclosed for securing a drill pipe (14) to a saver sub (16) for joint rotation. A slidable collar (24) is provided which has a pair of opposed lugs (28) which slide on opposed flats (18) on the saver sub to insure that the slidable collar rotates with the saver sub at all times. The drill pipe (14) has a pair of opposed flats (30) which are engaged by a portion of the lugs (28) when the slidable collar (24) is moved into the engaged position to insure rotation of the drill pipe with the saver sub.