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:
Jun. 13, 1995
Filed:
Nov. 10, 1993
John A Barton, Arlington, TX (US);
Robert G Davidson, Peterculter, GB;
James F Wilkin, Edmonton, CA;
Dresser Industries, Inc., Dallas, TX (US);
Abstract
Apparatus engageable with a well casing for suspending a perforating gun in the casing. The apparatus includes toothed slips forced into engagement with the well casing. A spring maintains an engaging force on the slips with the casing. In response to detonation of the perforating gun, a first release mechanism is operated to allow the perforating gun to drop a short distance. After initial dropping of the perforating gun, a second release mechanism is operated to release the engagement of the toothed slips with the casing, thereby allowing the entire unit to fall to the bottom of the well. A retrieval tool attached to a tubing string can be utilized to operate the second release mechanism, disengage the unit from the casing, and retrieve it from the well.