05911277 is referenced by 28 patents and cites 18 patents.

Apparatus and method for activating a device in a well, such as firing a perforating gun in a well. An electrically-activated firing system is coupled to an actuating assembly, which includes a release piston movable by fluid pressure, a firing pin, and a frangible element connected to hold the release piston in place, the frangible element being shattered in response to electrical activation of the firing system. A locking mechanism locks the firing pin to prevent movement of the firing pin, and the release piston is connected to release the locking mechanism if a minimum amount of fluid pressure is applied to the release piston after electrical activation of the firing system. A detonating assembly is connected to the perforating gun and is activable by the firing pin. The detonating assembly is activated when the firing pin is released by the locking mechanism to impact the detonating assembly.

Title
System for activating a perforating device in a well
Application Number
8/934786
Publication Number
5911277
Application Date
September 22, 1997
Publication Date
June 15, 1999
Inventor
Klaus B Huber
Sugar Land
TX, US
Joe C Hromas
Sugar Land
TX, US
Agent
Gordon G Waggett
John J Ryberg
Assignee
Schlumberger Technology Corporation
TX, US
IPC
E21B 43/1185
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