Hydraulic drive system for an oil well pump

    公开(公告)号:GB2293213A

    公开(公告)日:1996-03-20

    申请号:GB9522549

    申请日:1993-03-01

    Applicant: STANLEY LLOYD

    Inventor: STANLEY LLOYD

    Abstract: A hydraulic oil well pump drive system for driving an oil well sucker rod includes a master piston (358) positioned within a master cylinder (356) for axial displacement between first and second ends of the master cylinder. The master piston has a piston drive rod which extends through one end of the master cylinder and is reciprocated mechanically. A centre seal assembly (368) divides the master cylinder into a working chamber and a pressure chamber at opposite ends of the master cylinder. Seal assembly (368) comprises a central dividing seal (406, 407) separated by gaps (420, 422) from respective end seals (402, 404). The master piston displacement creates a bi-directional flow of working fluid from the working chamber. A wellhead hydraulic assembly is responsive to the working fluid flow to reciprocate an oil well sucker rod. A gas accumulator is in fluid communication with the pressure chamber to bias the master piston toward the master cylinder working end, providing an upward biasing force at the wellhead hydraulic assembly.

    Hydraulic oil well pump drive system

    公开(公告)号:GB9417449D0

    公开(公告)日:1994-10-19

    申请号:GB9417449

    申请日:1993-03-01

    Applicant: STANLEY LLOYD

    Abstract: A hydraulic oil well pump drive system for driving an oil well sucker rod includes a wellhead hydraulic assembly that is operably connected to the oil well sucker rod to reciprocate the sucker rod. The wellhead hydraulic assembly includes a hydraulic cylinder and a rod that reciprocates linearly within the hydraulic cylinder. The rod has an upper end with a circumferential groove that receives a split cylindrical bearing. The split cylindrical bearing is has two semicircular halves retained within the groove by the inner walls of the cylinder. The halves are retained vertically, relative to the rod, by the groove itself.

    15.
    发明专利
    未知

    公开(公告)号:NO315819B1

    公开(公告)日:2003-10-27

    申请号:NO943252

    申请日:1994-09-02

    Applicant: STANLEY LLOYD

    Inventor: STANLEY LLOYD

    Abstract: A hydraulic oil well pump drive system for driving an oil well sucker rod includes a wellhead hydraulic assembly that is operably connected to the oil well sucker rod to reciprocate the sucker rod. The wellhead hydraulic assembly includes a hydraulic cylinder and a rod that reciprocates linearly within the hydraulic cylinder. The rod has an upper end with a circumferential groove that receives a split cylindrical bearing. The split cylindrical bearing is has two semicircular halves retained within the groove by the inner walls of the cylinder. The halves are retained vertically, relative to the rod, by the groove itself.

    Clip for trellis assembly
    16.
    发明专利

    公开(公告)号:GB2351756A

    公开(公告)日:2001-01-10

    申请号:GB9915014

    申请日:1999-06-29

    Abstract: A clip for joining two trellis panels together comprises a base portion (11) from which two spaced-apart receptacle-receiving portions (R1, R2) project, the said receiving portions being arranged to engage elongate members of respective trellis panels. Preferably, the base is provided with a hinge (12) and means (18,20) to hold it in a back-to-back relationship.

    Hydraulic oil well pump drive system

    公开(公告)号:GB2278892B

    公开(公告)日:1996-08-28

    申请号:GB9417449

    申请日:1993-03-01

    Applicant: STANLEY LLOYD

    Inventor: STANLEY LLOYD

    Abstract: A hydraulic oil well pump drive system for driving an oil well sucker rod includes a wellhead hydraulic assembly that is operably connected to the oil well sucker rod to reciprocate the sucker rod. The wellhead hydraulic assembly includes a hydraulic cylinder and a rod that reciprocates linearly within the hydraulic cylinder. The rod has an upper end with a circumferential groove that receives a split cylindrical bearing. The split cylindrical bearing is has two semicircular halves retained within the groove by the inner walls of the cylinder. The halves are retained vertically, relative to the rod, by the groove itself.

    HYDRAULIC OIL WELL PUMP DRIVE SYSTEM

    公开(公告)号:CA2131192A1

    公开(公告)日:1993-09-16

    申请号:CA2131192

    申请日:1993-03-01

    Applicant: STANLEY LLOYD

    Inventor: STANLEY LLOYD

    Abstract: 2131193 9316897 PCTABS00025 A wheel chocking system (10) for restraining road vehicles being transported on a vehicle support surface of a transport vehicle is disclosed. The support surface has a grating (11) disposed in at least a wheel support area where one or more road vehicles are positioned. The grating (11) is formed by a grid of rods to which are secured chock members (16) at desired positions relative to the position of the wheels (14) of the road vehicle positioned over the wheel support area. Each chock (16) has a base with disengageable attachment members in a lower engaging surface thereof to immovably secure the chock (16) to the grating (11). The chock has an angulated face plate which is positioned relative to an outer tread surface of a tire of a wheel to restrain movement thereof. Load transmitting members transfer a load applied to the face plate onto the base member and into the grating secured to the support surface. A lateral restraining member (17) is provided on a side of the face plate and disposed adjacent an inner side wall portion of the tire (14) to prevent lateral shifting of the vehicle positioned on the support surface.

    Cleaning and drying of electronic assemblies
    20.
    再颁专利
    Cleaning and drying of electronic assemblies 失效
    电子组件的清洁和干燥

    公开(公告)号:USRE35975E

    公开(公告)日:1998-12-01

    申请号:US313401

    申请日:1994-09-27

    Abstract: Components, especially of an electronic or electrical type, are cleaned by contact with a flammable liquid organic solvent (21), especially an alcohol. The surface of the solvent is covered with a non-flammable highly fluorinated compound vapor blanket (26), which vapor may also be used to transfer heat to the organic solvent. Both highly fluorinated compound and organic solvent are condensed and re-cycled.

    Abstract translation: 特别是电子或电气类型的组件通过与易燃液体有机溶剂(21),特别是酒精的接触来清洁。 溶剂的表面覆盖有不可燃的高度氟化的化合物蒸汽层(26),该蒸气也可用于将热量传递到有机溶剂。 高度氟化的化合物和有机溶剂都被冷凝并重新循环。

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