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. 05, 1991
Filed:
Nov. 27, 1989
William R Welch, Carrollton, TX (US);
Otis Engineering Corporation, Carrollton, TX (US);
Abstract
A well tool locking assembly comprising a lock mandrel having locking keys adapted to releasably engage a locking annulus within a well bore, and a latch assembly adapted to maintain the lock mandrel in a desired positional relation to the locking annulus until such time as the locking keys engage the locking annulus; the latch assembly further comprising at least one rotatably mounted, outwardly biased pawl adapted to engage the locking annulus, and a shear pin disposed below the pawl, the pawl being adapted to rotate downwardly into contact with the shear pin whenever the pawl is forced into contact with the upper portion of the locking annulus, the shear pin being further adapted to shear whenever the force exerted on it by the pawl exceeds a predetermined maximum.