Patent ID: 8387533
Filing Date: 2013-03-05
Classification: E21B,F42D,H01H

Abstract:
1. A downhole perforating gun switch, comprising: a) a sub housing; b) a body having first and second ends, with a bore extending between the first and second ends, the body located in the sub housing such that the second end is exposed to detonation effects; c) a first electrical contact located adjacent to the body first end; d) a conductor located in the bore; e) a second electrical contact located in the bore adjacent to the body second end; f) an intermediate electrical contact located in the bore interposed between the first contact and the second contact; g) a thermoplastic plug located in the sleeve between the intermediate and second contacts; h) the plug, the intermediate contact and the second contact movable between a first position in the sleeve, wherein there is electrical continuity between the intermediate contact, the conductor and the second contact and electrical discontinuity between the intermediate contact and the first contact, and a second position, wherein there is electrical continuity between the first contact and the intermediate contact and electrical discontinuity between the intermediate contact and the second contact.