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. 09, 1993
Filed:
Apr. 10, 1991
A Glen Edwards, Hockley, TX (US);
Klaus B Huber, Sugar Land, TX (US);
Antoni K Miszewski, Missouri City, TX (US);
Schlumberger Technology Corporation, Houston, TX (US);
Abstract
In the representative embodiment of the method and apparatus of the invention which are disclosed herein, a well tool arranged for suspension in a well bore from a cable includes a mandrel that is telescopically arranged on the tool body and is operable after the tool is stationed in a well bore to be shifted upwardly and downwardly by the cable. A pressure-responsive actuator is arranged on the tool for being released in response to an initial downward movement of the suspension cable for rapidly extending an anchor on the tool body into engagement with the well casing. Thereafter, a successive upward movement of the suspension cable is effective for releasing the pressure-responsive actuator for slowly traveling to a position in the tool body where a firing pin on the body is released for detonating an impact-actuated explosive device on the tool only after a predetermined time delay following the upward cable movement. Subsequent cable movements are operative for thereafter disengaging the anchor to enable the tool to be recovered from a well bore wall.