专利名称：OIL WELL PUMP DRIVING UNIT发明人：GILBERTSON, Thomas A.申请号：EP81902531.0申请日：19810902公开号：EP0059213A1公开日：19820908
摘要： A pumping equipment in an oil well comprises a reciprocating pump immergee(45) mounted in a casing (40) communicating with the wellhead, a linkage (67) extendingthrough the casing (40) and leading to the pump, and a T pumping device and a gland(50) fitted on the housing (73) of the well to the wellhead and comprising a drive device(62) sealed in the stuffing box causing said linkage, and a unit drive of the pump (110, 120,130), the axis of the piston rod (111) being aligned with one of said gland (50). A couplingmeans (125) is provided for coupling the piston rod (111) to the sealed drive device (62).A unit drive / hydraulic control (130) is associated with the feed line / fluid discharge (112)to operate the hydraulic cylinder (110) to produce an operating cycle comprising a pistonupstroke by hydraulic action and a race to the bottom by gravity.
申请人：GILBERTSON, Thomas A.
地址：216 Sandringham North Moraga, CA 94566 US
国籍：US
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