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. 24, 2002
Filed:
Jan. 31, 2000
Applicant:
Inventors:
Mark Carmichael, Jersey, GB;
Paul Howlett, Aberdeen, GB;
Assignee:
Specialised Petroleum Services Limited, Westill, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/706 ;
U.S. Cl.
CPC ...
E21B 1/706 ;
Abstract
A down-hole tool comprises a generally tubular body for connection in a drill string, the body typically having an upper tubular member and a lower tubular member interconnected to be axially secured and relatively rotatable, and a frangible element securing the upper and lower members together rotationally and adapted to rupture at a predetermined load