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:
Jan. 12, 1999
Filed:
Nov. 04, 1996
Applicant:
Inventors:
Larry J Leising, Sugar Land, TX (US);
Howard L McGill, Lufkin, TX (US);
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21B / ;
U.S. Cl.
CPC ...
285-3 ; 166178 ; 175321 ; 175301 ;
Abstract
A releasable connection between the lower end of a running string and a well tool that is subject to being stuck in a well includes inner and outer members movable telescopically between contracted and extended positions, a tension sleeve connecting the members in the contracted position and being disrupted by a predetermined pull to allow telescoping movement, a stop nut to limit such movement in the extended position of the members, and a mechanism responsive to a certain number of cycles of telescoping movement for disabling the stop nut to allow complete release and separation of the members.