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:
Mar. 18, 1986
Filed:
Mar. 21, 1983
Applicant:
Inventors:
W Kirby Murray, Bossier City, LA (US);
David O Sullivan, Bossier City, LA (US);
Assignee:
Tri-State Oil Tool Industries, Inc., Bossier City, LA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285 39 ; 285 92 ; 285178 ; 285333 ; 285 24 ; 403 20 ; 403343 ; 403353 ; 411264 ; 411384 ; 166301 ;
Abstract
A locking pipe sub is disclosed including a threaded pin connection for engaging, for example, a pipe stuck in a well bore. The threads on the pin are formed in two sections which are adapted to align upon initial make-up of the sub to the stuck pipe, but to misalign, both axially and radially, when reverse torque is applied to the sub. The result is to create axial and radial forces between the threads of the sub and the threads of the stuck pipe which positively lock the sub against disconnection from the pipe except with the use of a releasing tool.