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公开(公告)号：US10962000B2
公开(公告)日：2021-03-30
申请号：US16378085
申请日：2019-04-08
摘要： A long stroke pumping unit includes a tower and a counterweight assembly movable along the tower. A belt includes a first end connected to the counterweight assembly and a second end connectable to a rod string. A prime mover is used to reciprocate the counterweight assembly along the tower. A sensor detects the position of the counterweight assembly, and a load cell measures the force exerted on the rod string. A motor is provided to adjust an effective weight of the counterweight assembly during reciprocation thereof along the tower. A controller communicates data with the sensor and the load cell and controls the adjustment force exerted by the adjustment motor.
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公开(公告)号：US10947825B1
公开(公告)日：2021-03-16
申请号：US16709815
申请日：2019-12-10
申请人： George R Dreher
发明人： George R Dreher
摘要： Cushioning dampers are beneficial for preventing stress cracks on a sucker rod reciprocating pump whose circular arc head is contiguous with a counterweight and is pivotably connected to the pitman arm, crank arm weight, and speed reducer. The pitman arm is substantially horizontal and the crank arm to wrist pin phase angle is about 70-90 degrees. Auxiliary counter weight extends from the head weight on a stinger and the head weights are adjustable. The head weight diameter is either constrained within the circular arc head's outer diameter or can be larger. The upper pitman bearings are outboard on the equalizer which is integral with the head. The center bearing of the head is outboard on the rectangular sampson post. The head counterweight increases permissible load on a speed reducer. This invention has embodiments for adjusting sampson post height and pitman arm length; and for changing the stroke length without removing the wrist pin from the crank weight hole.
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公开(公告)号：US10941761B2
公开(公告)日：2021-03-09
申请号：US15408335
申请日：2017-01-17
申请人： Ravdos Holdings Inc.
摘要： A pump jack includes a base, a pedestal supported by the base and a Samson post that supports a walking beam. The Samson post includes a front leg that is supported by the base and a connection bracket affixed to the front leg. The Samson post further includes an adjustable rear leg that is connected between the connection bracket and the pedestal. The rear leg can be rotated and shifted up and down within the connection bracket to ensure that the opposite end of the rear leg is properly located on the pedestal.
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公开(公告)号：US10900483B2
公开(公告)日：2021-01-26
申请号：US16026296
申请日：2018-07-03
IPC分类号： F04C13/00 , E21B43/12 , E21B33/08 , F04B47/02 , E21B17/10 , F04B53/16 , E21B7/04 , E21B19/16 , E21B19/08 , E21B19/14
摘要： A downhole pump is used for a reciprocating pump system having a rod string disposed in a tubing string. A barrel of the pump is disposed, and a plunger of the pump coupled to the rod string is movably disposed in the barrel. The plunger has an external surface disposed at an annular gap relative to the barrel's internal surface. The external surface has circumferential grooves defined thereabout that hold wipers. An inner ring of the wipers composed of a swellable material is engaged in the one or more circumferential grooves, while an outer ring composed of a second material is disposed about the inner ring. The swellable material of the inner ring energizes the outer ring in slideable engagement with the internal surface of the barrel.
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公开(公告)号：US10900481B2
公开(公告)日：2021-01-26
申请号：US15099342
申请日：2016-04-14
IPC分类号： F04B49/06 , E21B43/12 , E21B47/008 , F04B35/00 , F04B49/20 , F04B47/02 , F04B23/02 , F04B23/10 , F04B53/10
摘要： A controller for operating a prime mover of a rod pumping unit includes a processor configured to operate the prime mover over a first stroke and a second stroke. The controller is further configured to compute a first motor torque imbalance value for the first stroke and engage adjustment of a counter-balance. The controller is further configured to estimate a second motor torque imbalance value for the second stroke. The controller is further configured to disengage adjustment of the counter-balance during the second stroke upon the second motor torque imbalance value reaching a first imbalance range.
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公开(公告)号：US10895254B2
公开(公告)日：2021-01-19
申请号：US15743572
申请日：2015-09-04
发明人： Joseph A. Beisel
IPC分类号： F04B51/00 , F04B1/00 , F04B47/00 , F04B47/04 , F04B49/06 , G01B7/00 , F04B19/04 , F04B9/04 , F04B47/02
摘要： A monitoring system may include a position sensor, a strain gauge, and a computing device for determining the condition of a valve in a chamber of a pump using strain measurements. The strain gauge may determine strain in the chamber. The position sensor may determine the position of a crankshaft coupled to a plunger in the chamber. The computing device may receive signals generated by the strain gauge and the position sensor related to the strain in the chamber and the position of the crankshaft, respectively, and may process the signals to determine delays in the actuation of the valves.
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公开(公告)号：US20210003124A1
公开(公告)日：2021-01-07
申请号：US16459380
申请日：2019-07-01
IPC分类号： F04B47/02
摘要： A pump jack with counterbalance system is provided, including a supporting structure, a linear actuator with a housing and a shaft, a first pulley carried by the shaft, a second pulley fixed above the first pulley, an elongate flexible member, and a weight cared by the shaft. The housing is vertically oriented and mounted to the supporting structure above a ground surface. The shaft has a first end received within the housing and a connection end that extends out of the housing and carries the first pulley and the weight. The linear actuator drives the shaft between extended and retracted positions. The elongate member passes around the pulleys and has a first end fixed relative to the housing and a second end connected to a surface rod, such that reciprocating movement of the shaft causes the surface rod to move vertically and the weight to act as a mechanical counterbalance.
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公开(公告)号：US10851774B2
公开(公告)日：2020-12-01
申请号：US14945163
申请日：2015-11-18
IPC分类号： F04B49/20 , F04B47/02 , F04B53/14 , F04B19/22 , F04B51/00 , E21B43/12 , E21B47/00 , E21B47/008
摘要： A controller for operating a rod pumping unit at a pump speed. The controller includes a processor configured to operate a pump piston of the rod pumping unit at a first speed. The processor is further configured to determine a pump fillage level for a pump stroke based on a position signal and a load signal. The processor is further configured to reduce the pump speed to a second speed based on the pump fillage level for the pump stroke.
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公开(公告)号：US20200340337A1
公开(公告)日：2020-10-29
申请号：US16856860
申请日：2020-04-23
发明人： Mehdi MOUSAVI
IPC分类号： E21B43/12 , E21B47/008 , F04B47/02 , F04B49/20
摘要： A system and method for optimizing performance of an artificial lift system are provided. The optimization process can be performed automatically by a controller configured to receive optimization parameters from the user and information regarding the performance of the system. The optimization process adjusts the pumping speed of the system in response to measured rod load and a position of the downhole pump or surface pumping unit. More particularly, the optimization process can increase or decrease the pump speed of the system in response to the measured rod load at a reference position relative to a reference rod load at the reference position. The reference load and position can be selected to indicate pump inefficiencies. For example, the target reference load and position can indicate fluid pounding if the measured rod load at the reference position is greater than the reference rod load at the reference position.
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公开(公告)号：US10815984B2
公开(公告)日：2020-10-27
申请号：US15666526
申请日：2017-08-01
发明人： Garnett W. Valentine
摘要： A pump jack includes a number of standard components that have been sized and configured according to unique relative dimensions to produce a pump jack that reduces structural stress, increases bearing life and permits a lower cost of manufacture. These geometric ratios can be used to express the relative size and spacing of the crankshaft, crank arms, center bearing, equalizer bearing, walking beam and pitman arms. Pump jacks incorporating one or more of these geometric ratios can be sized and scaled for a variety of pumping applications.
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