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:
Apr. 21, 1992
Filed:
Mar. 15, 1990
Applicant:
Inventor:
Cyril R Sumner, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F42B / ; F42C / ;
U.S. Cl.
CPC ...
102312 ; 102313 ; 102265 ;
Abstract
A fluid sensitive, polarity sensitive safety detonator system for use in a perforating gun assembly is disclosed. The detonator system is housed within the perforating gun housing and is operatively connected to surface located detonating means. A non-electric detonator is selectively coupled with an electrically fired detonator so that the detonators are not coupled during transit, during arming of the device, during assembly of the device and at all other times. A polarity sensitive circuit selectively arms the detonator assembly and a safety interlock system automatically grounds the detonator assembly upon intrusion of borehole fluids within the peforating gun housing.