Boring or penetrating the earth – Boring with explosion in inaccessible hole – With bore condition firing control – or compensating means
Patent
1995-01-04
1997-10-28
Neuder, William P.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
With bore condition firing control, or compensating means
175 456, 166297, E21B 4311
Patent
active
056809050
ABSTRACT:
An apparatus for actuating a firing head is disclosed. The apparatus contains a firing head that is operatively connected to a detonating cord of a perforating gun containing a series of shaped charges. The perforating gun will be connected to a work string in a wellbore filled with a fluid. The apparatus generally comprises a housing member having an inner portion and an outer portion; a blocking member for blocking passage of a hydrostatic pressure; a mechanical activation piston, adapted to be received within the housing member, for mechanically opening the blocking member. The apparatus further contains a hydraulic activation piston, adapted to be received within the housing member, for activating a percussion initiator firing member; and a transfer charge booster that transfers the detonation to a detonation cord.
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Green Robert R.
Myers William D.
Baker Hughes Incorporated
Neuder William P.
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