WAVE MOTION COMPENSATION SYSTEM FOR SUSPENDING WEL

专利名称：WAVE MOTION COMPENSATION SYSTEM

FOR SUSPENDING WELL EQUIPMENT FROMA FLOATING VESSEL

发明人：GEORGE R. BURRELL申请号：US3653636D申请日：19700209公开号：US3653636A公开日：19720404

摘要：A reversible hydraulic motor and a high pressure-low pressure hydraulicreservoir system are used to counterbalance the weight of a drill string or other wellequipment suspended from a line wound on a draw works positioned on a floating vessel.A load cell controls the torque output and the direction of the output drive of thehydraulic motor and in turn torque on and the direction of rotation of the draw works. Ondownward movement of the floating vessel high pressure hydraulic fluid from anaccumulator moves through the hydraulic motor into a low pressure hydraulic fluidreservoir to provide increased torque to the draw works as the draw works spools up lineand upward movement of the floating vessel the hydraulic motor reverses and becomesa pump and moves low pressure fluid from the low pressure reservoir to the highpressure accumulator to provide decreased torque and reverse direction to the drawworks as the draw works spools off line.

申请人：ESSO PRODUCTION RESEARCH CO.

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