Halliburton Company

David R Warren

Cyril R Sumner

Joe E Eggleston

For use in a perforating gun assembly which incorporates an explosive for detonation of a string of shaped charges, all the explosive materials forming a significant, violent pressure shock wave propagated up a cased well borehole, a pressure actuated switch includes an enlarged piston having a head exposed to the pressure shock wave, a stem connected to said head, bifurcated fingers capturing a resilient material therebetween to permit flexure, a surrounding sleeve which is made of metal and defined in multiple portions, and a plurality of metal contacts contiguous to said stem and adapted to be selectively contacted by said metal sleeve to either make or break on movement of said piston.

Shock actuated switch for perforating gun assembly

For use with a wire line supported tool adapted to be run in open hole, a wire line connector to be installed between the wire line and at the top of the tool is set forth. The line moving apparatus of this disclosure preferably incorporates concentric telescoping sleeves with guide slots and cooperative protruding lugs. This apparatus attaches to the top end of a tool which is to be held stationary. This enables the supportive wire line to be continuously moved with stroking motion to thereby prevent pressure differential sticking at key seating the mud cake in the open hole.

Growing community of inventors

Manvel, TX, United States of America

David R Warren