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公开(公告)号：WO9318306A3
公开(公告)日：1994-01-06
申请号：PCT/CA9300085
申请日：1993-03-01
Applicant: STANLEY LLOYD
Inventor： STANLEY LLOYD
CPC classification number: F04B53/006 , F04B9/105 , F04B47/04 , F04B53/164 , F04B2201/0206
Abstract: A hydraulic oil well pump drive system (100) for driving an oil well sucker rod (not shown) includes a master piston (158) positioned within a master cylinder (156) for axial displacement between first and second ends of the master cylinder (156). The master piston (158) has a piston drive rod (164) which extends through one end of the master cylinder (156). The drive rod (164) is connected to a crankpin (147) of an eccentric crank (144). The eccentric crank (144) is driven at a constant rotational speed to reciprocate the master piston (158) within the master cylinder (156) at a sinusoidal rate. A center seal assembly (168) divides the master cylinder (156) into a working chamber (170) and a pressure chamber (172) in opposite ends of the master cylinder (156). Each respective chamber defines a fluid volume which varies with the displacement of the master piston (158). The master piston (158) displacement creates a bi-directional flow of working fluid from the working chamber (170). A wellhead hydraulic assembly (111) is operably connected to the oil well sucker rod and is in fluid communication with the master cylinder working chamber (170) to receive the working fluid flow. The wellhead hydraulic assembly (111) is responsive to the working fluid flow to reciprocate an oil well sucker rod at a rate which relates to the rate of master piston (158) displacement. A gas accumulator (176) is in fluid communication with the master cylinder pressure chamber (172) to bias the master piston (158) toward the master cylinder working end, providing an upward biasing force at the wellhead hydraulic assembly (111).
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公开(公告)号：GB2293213B
公开(公告)日：1996-08-28
申请号：GB9522549
申请日：1993-03-01
Applicant: STANLEY LLOYD
Inventor： STANLEY LLOYD
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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.
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公开(公告)号：GB2278892A
公开(公告)日：1994-12-14
申请号：GB9417449
申请日：1993-03-01
Applicant: STANLEY LLOYD
Inventor： STANLEY LLOYD
Abstract: A hydraulic oil well pump drive system (100) for driving an oil well sucker rod (not shown) includes a master piston (158) positioned within a master cylinder (156) for axial displacement between first and second ends of the master cylinder (156). The master piston (158) has a piston drive rod (164) which extends through one end of the master cylinder (156). The drive rod (164) is connected to a crankpin (147) of an eccentric crank (144). The eccentric crank (144) is driven at a constant rotational speed to reciprocate the master piston (158) within the master cylinder (156) at a sinusoidal rate. A center seal assembly (168) divides the master cylinder (156) into a working chamber (170) and a pressure chamber (172) in opposite ends of the master cylinder (156). Each respective chamber defines a fluid volume which varies with the displacement of the master piston (158). The master piston (158) displacement creates a bi-directional flow of working fluid from the working chamber (170). A wellhead hydraulic assembly (111) is operably connected to the oil well sucker rod and is in fluid communication with the master cylinder working chamber (170) to receive the working fluid flow. The wellhead hydraulic assembly (111) is responsive to the working fluid flow to reciprocate an oil well sucker rod at a rate which relates to the rate of master piston (158) displacement. A gas accumulator (176) is in fluid communication with the master cylinder pressure chamber (172) to bias the master piston (158) toward the master cylinder working end, providing an upward biasing force at the wellhead hydraulic assembly (111).
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公开(公告)号：NO943252L
公开(公告)日：1994-10-13
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.
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Patent Agency Ranking
公开(公告)号：NO943252A
公开(公告)日：1994-10-13
申请号：NO943252
申请日：1994-09-02
Applicant: STANLEY LLOYD
Inventor： STANLEY LLOYD
CPC classification number: F04B53/006 , F04B9/105 , F04B47/04 , F04B53/164 , F04B2201/0206
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公开(公告)号：CA2452708C
公开(公告)日：2007-07-17
申请号：CA2452708
申请日：1993-03-01
Applicant: STANLEY LLOYD
Inventor： STANLEY LLOYD
Abstract: 33 A hydraulic oil well pump drive system for driving an oil well sucker rod (n ot shown) includes a master piston positioned within a master cylinder for axia l displacement between first and second ends of the master cylinder. The maste r piston has a piston drive rod which extends through one end of the master cylinder. The drive rod is connected to a crankpin of an eccentric crank. The eccentric crank is driven at a constant rotational speed to reciprocate the master piston within the master cylinder at a sinusoidal rate. A center seal assembly divides the master cylinder into a working chamber and a pressure chamber in opposite ends of the master cylinder. Each respective chamber defines a fluid volume which varies with the displacement of the master piston. The master piston displacement creates a bi-directional flow of working flui d from the working chamber. A wellhead hydraulic assembly is operably connected to the oil well sucker rod and is in fluid communication with the master cylinder working chamber to receive the working fluid flow. The wellhead hydraulic assembly is responsiv e to the working fluid flow to reciprocate an oil well sucker rod at a rate which relates to the rate of master piston displacement. A gas accumulator is in fluid communication with the master cylinder pressure chamber to bias the master piston toward the master cylinder working end, providing an upward biasing force at the wellhead hydraulic assembly.
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公开(公告)号：CA2131192C
公开(公告)日：2004-05-25
申请号：CA2131192
申请日：1993-03-01
Applicant: STANLEY LLOYD
Inventor： STANLEY LLOYD
Abstract: A hydraulic oil well pump drive system (100) for driving an oil well sucker rod (not shown) includes. a master piston (158) positioned within a master cylinder (156) for axial displacement between first and second ends of the master cylinder (156). The master piston (158) has a piston drive rock (164) which extends through one end of the master cylinder (156). The drive rod (164) is connected to a crankpin (147) of an eccentric crank (144). The eccentric crank (144) is driven at a constant rotational speed to reciprocate the master piston (158) within the master cylinder (156) at a sinusoidal rate. A center seal assembly (168) divides the master cylinder (156) into a working chamber (170) and a pressure chamber (172) in opposite ends of the master cylinder (156). Each respective chamber defines a fluid volume which varies with the displacement of the master piston (158). The master piston (158) displacement creates a bi-directional flow of working fluid from the working chamber (170). A wellhead hydraulic assembly (111) is operably connected to the oil well sucker rod and is in fluid communication with the roaster cylinder working chamber (170) to receive the working fluid flow. The wellhead hydraulic assembly (111) is responsive to the working fluid flow to reciprocate an oil well sucker rodat a rate which relates to the rate of master piston (158) displacement. A gas accumulator (176) is in fluid communication with the master cylinder pressure chamber (172) to bias the master piston (158) toward the master cylinder working end, providing an upward biasing force at the wellhead hydraulic assembly (111).
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公开(公告)号：NO943252D0
公开(公告)日：1994-09-02
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.
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公开(公告)号：CA2452708A1
公开(公告)日：1993-09-16
申请号：CA2452708
申请日：1993-03-01
Applicant: STANLEY LLOYD
Inventor： STANLEY LLOYD
Abstract: 33 A hydraulic oil well pump drive system for driving an oil well sucker rod (n ot shown) includes a master piston positioned within a master cylinder for axia l displacement between first and second ends of the master cylinder. The maste r piston has a piston drive rod which extends through one end of the master cylinder. The drive rod is connected to a crankpin of an eccentric crank. The eccentric crank is driven at a constant rotational speed to reciprocate the master piston within the master cylinder at a sinusoidal rate. A center seal assembly divides the master cylinder into a working chamber and a pressure chamber in opposite ends of the master cylinder. Each respective chamber defines a fluid volume which varies with the displacement of the master piston. The master piston displacement creates a bi-directional flow of working flui d from the working chamber. A wellhead hydraulic assembly is operably connected to the oil well sucker rod and is in fluid communication with the master cylinder working chamber to receive the working fluid flow. The wellhead hydraulic assembly is responsiv e to the working fluid flow to reciprocate an oil well sucker rod at a rate which relates to the rate of master piston displacement. A gas accumulator is in fluid communication with the master cylinder pressure chamber to bias the master piston toward the master cylinder working end, providing an upward biasing force at the wellhead hydraulic assembly.
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