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:
Sep. 07, 1999
Filed:
Aug. 13, 1997
Michael J Gazewood, Scott, LA (US);
Thru-Tubing Technology, Inc., Scott, LA (US);
Abstract
A device for latching onto a down hole object located within a well bore is claimed. The device will include a mandrel connected to a work string and with an end adapted to engage the object. The device also includes a biasing member disposed about the mandrel; and, a collet member operatively disposed about the mandrel. The collet member will have a first end adapted to cooperate with the biasing member and a second end that contains an engaging member, operatively associated with the second end of the mandrel, for engaging the object. The mandrel and the collet member cooperate to form a chamber. The device will also include a locking member, contained within the chamber, for locking the mandrel and collet member together so that the mandrel and collet member act as one member. The locking member includes: a detent member; a housing member containing the detent member; a piston, adapted for containment within the chamber, for activating the locking member; and, a groove on the mandrel that cooperates with the detent member. The device may further comprise an activation port, associated with the mandrel, for activating the piston so that the housing member holds the detent member within the groove. The work string may be attached to a drill string, coiled tubing string or other work string. The object may be a stuck down hole tool, a down hole packer means, or some other type of apparatus used in the drilling, completion, and/or production of wells. Also disclosed is a method of engaging a down hole object with the spear device.