Pressure responsive explosion initiator with time delay and...

Details Pressure responsive explosion initiator with time delay and... Pressure responsive explosion initiator with time delay and...

E - Fixed Constructions

21

B

166/13

E21B 29/02 (2006.01) E21B 43/116 (2006.01) E21B 43/1185 (2006.01) F42D 1/04 (2006.01)

Patent

CA 1224139

PRESSURE RESPONSIVE EXPLOSION INITIATOR WITH TIME DELAY AND METHOD OF USE ABSTRACT OF THE DISCLOSURE A device for actuating an explosive charge downhole in a wellbore. The device includes a combustive reaction initiator actuated in response to a first pressure condition in a portion of the wellbore and an explosive charge actuator. A time delay device is provided wherein a combustive reaction is initiated by the initiator and continues for a time delay period providing sufficient time for an operator to alter the first pressure condition to a second pressure condition desired at the time of explosive actuation. The delay device is operative at the end of the time delay period after initiation to actuate the explosive charge.

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