Pressure responsive explosion initiator with time delay and meth

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

1986-01-06

1986-09-30

Nelson, Peter A.

Ammunition and explosives

Blasting

Patterned blasting

102313, 102322, 1022753, 10227511, 89 113, 166 63, F42B 102

Patent

active

046141561

ABSTRACT:
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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