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:
Aug. 01, 2000
Filed:
Aug. 28, 1998
Applicant:
Inventors:
James W Reese, Spring, TX (US);
Craig A Beveridge, Spring, TX (US);
Assignee:
Western Atlas International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; F23Q / ; F42B / ;
U.S. Cl.
CPC ...
175-454 ; 175-456 ; 166 651 ; 166 551 ; 102206 ; 102306 ;
Abstract
A perforating gun assembly for perforating wellbores, comprising a shaped charge carrier assembly, a detonating cord for initiation OF shaped charges in the carrier assembly, an initiator attached to the detonating cord for initiating the cord on application of an electrical control signal to the detonator, and a pressure safety switch connected to the initiator. The pressure safety switch electrically connects the initiator to an electrical cable for carrying the control signal, when a preselected pressure is applied to the pressure safety switch.