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:
Dec. 28, 2004
Filed:
Sep. 27, 2002
Den norske stats oljesselskap A.S., Stavanger, NO;
Abstract
This invention relates to a torque release coupling for use in drill strings comprising an outer string part ( ) rotatably mounted outside a radially inner string part ( ), and a rotation lock ( ) positioned between them. The rotation lock ( ) is coupled to a first of said string parts ( ) with a coupling device ( ) adapted to allow axial shifts relative to the first string part, and comprising axial gripping organs ( ) adapted for releasable engagement with cooperating gripping organs in the second string part, the rotation lock ( ) comprising a spring ( ) or similar adapted to apply an axial force on the rotation lock ( ) directed against the cooperating gripping organs ( ) from the first string part.