Method and apparatus for causing pressure variations in a wellbore
作者： Clifford J. Anderson , Michael F. Schoettler , Brian R. Thicke , Richard Selinger
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摘要: A method and apparatus for causing pressure variations in a wellbore. valve mechanism sealing device are provided the The is part of actuatable between open closed positions. Actuation to position allows an increase below device. fluid pass through up alternately actuated positions cause cyclical includes mechanism, passage, control delay delaying actuation. wellbore caused by either or both entering from adjacent formation introduction pressurized into
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