Pressure cycle operated apparatus and methods. A method of actuating a firing head includes the steps of : reciprocably displacing an actuator piston of the firing head, the displacing step including the piston being alternately pressure balanced and unbalanced; and igniting a combustible material in response to the piston displacing step. A method of generating electricity includes: reciprocably displacing a piston, the displacing step including the piston being alternately pressure balanced and unbalanced; and generating electricity in response to the piston displacing step. A firing head includes an actuator piston separating at least two chambers; a check valve which permits one-way flow between the chambers; a flow restrictor which restricts flow between the chambers; a biasing device which biases the piston toward one of the chambers; and a firing pin releasing device which releases a firing pin in response to displacement of the piston.
申请公布号
WO2010096360(A2)
申请公布日期
2010.08.26
申请号
WO2010US24230
申请日期
2010.02.15
申请人
HALLIBURTON ENERGY SERVICES, INC.;MOORE, RANDALL, S.;HALES, JOHN, H.