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:
Feb. 11, 1992
Filed:
Nov. 08, 1990
John R Setterberg, Jr, Dallas, TX (US);
Pat M White, Carrollton, TX (US);
Otis Engineering Corporation, Dallas, TX (US);
Abstract
A well packer for sealing an annular space within a well bore around a tubing string including a tubular mandrel, an expandable seal assembly on the mandrel for sealing around the mandrel with a well bore wall, a slip assembly on the mandrel for releasably locking the packer with the well bore wall, a drag spring and slip carrier assembly around the slip assembly, and an interlock assembly for selectively coupling the drag spring and slip carrier assembly with the mandrel for operating the packer through running, set, and release modes. The interlock assembly includes running segments movable a limited distance on the mandrel to prevent jamming of the packer parts in response to mandrel rotation in a non-setting direction. The interlock assembly also includes locking segments having structure to fully seat the segments on the mandrel under load and to minimize packer element compression loss during setting. The packer has an emergency release feature for releasing the packer in the event that well obstructions or other problems prevent normal rotation of the tubing string and mandrel to operate the interlock assembly.