A long stroke beam pumping unit includes a base and a driving mechanism fixedly mounted at one end of the base. A walking beam is provided at the other end of the base via a bracket mechanism to form a beam structure, a donkey head is mounted at the front end of the walking beam, and the rear end of the walking beam is connected to the driving mechanism via a connecting rod to form a crank-connecting rod structure. A middle seat is mounted on the walking beam, the bracket mechanism includes a front bracket and a rear bracket connected to each other at top ends, and the other ends of the front bracket and the rear bracket are mounted at both sides of the base. The long stroke beam pumping unit reduces stress concentration by adjusting the size of the component and optimizing the bracket mechanism.

A pump jack controller is provided that can harness the potential energy generated during the operation of one pump jack amongst a plurality of pump jacks located at a well site and convert that potential energy into electrical energy that can be used to provide electrical power generated by the pump jack to power the other pump jacks located at the well site.

A tool configured to align a polished rod within a carrier bar of a pumpjack is described. While this tool can include any suitable component, in some cases, it includes a cylindrical member having an internal conduit, allowing the cylindrical member to wrap around and receive the polished rod. In some cases, the cylindrical member has a top having a first outer diameter, and a bottom having a second, larger outer diameter. In some cases, the cylindrical member comprises one, two, or more discrete pieces. In some cases, a flange extends horizontally from the bottom of the cylindrical member, to be disposed at a bottom portion of the carrier bar. In some cases, the cylindrical member comprises a slit that extends from the top to the bottom of the cylindrical member to allow the member to be opened and to receive the polished rod. Additional implementations are described.

A method can include operating a pump system; determining a condition associated with the pump system; and controlling the pump system based at least in part on the condition.

A method for evaluating data from a reciprocating downhole pump includes the steps of acquiring downhole position and load data, providing the position and load data to a processing unit, normalizing the position and load data, converting the position and load data to a calculated polar coordinate data set, evaluating the calculated polar coordinate data set to determine a condition or occurrence at the reciprocating pump, and outputting calculated key parameters for controlling and optimizing the reciprocating pump and beam pumping unit. The method further comprises a step of creating a library of reference data sets, comparing the calculated polar data set against the library of ideal and reference data sets, identifying one or more reference data sets that match one or more portions of the calculated polar data set, and outputting the probability of one or more of the known conditions within the calculated polar data set.

A method for controlling a well pumping system is provided. The method includes the steps of entering a pump intake depth, a minimum fill preset, a maximum fill preset, and a gain value into a controller for the well pumping system, and determining a fluid over pump level. If the fluid over pump level is zero, the method calls for setting a target pump fill equal to the maximum fill preset. If the fluid over pump level is not zero, the method calls for calculating a fluid over pump ratio using the pump intake depth, and calculating the target pump fill using the fluid over pump ratio and the gain value. Further, the method includes calculating a pump fill error as the difference between the target pump fill and an actual pump fill. The method further includes controlling a pumping speed of the well pumping system based on the pump fill error.

An oil well pumping unit. The pumping unit has a vertical support column residing adjacent a horizontal support base at a generally transverse orientation. The pumping unit has a standing sheave fixed proximate an upper end of the vertical support column, a carrier bar configured to be attached to a polished rod along the front face of the vertical support column, and a traveling sheave configured to move up and down along the vertical support column. A near-vertical actuator resides along the horizontal support base, and is connected to the traveling sheave. Cyclical movement of the linear actuator causes the traveling sheave to reciprocate up and down along the vertical support column such that upward movement of the traveling sheave produces a downstroke of the polished rod, while downward movement of the traveling sheave produces an upstroke of the polished rod. The linear actuator remains in tension at all times during movement of the polished rod.

Oil well auxiliary power system. The oil well extraction system includes a primary mover coupled to a pumpjack. The primary mover comprises a motor. A stub shaft is coupled to the motor of the primary mover. A gear system is coupled to the stub shaft. A generator is coupled to the gear system.

An exemplary pump jack system (10) is operable to cause well liquid to be pumped to the surface by a subsurface well pump (29). The exemplary system includes a driver (42) that is in rotatable connection with a pump/motor (48). The pump/motor is a rotary type variable output positive displacement pump/motor that delivers working liquid at a selectively variable flow rate in closed liquid connection to a motor/pump (38). The exemplary motor/pump includes a rotatable output coupler (40) that is in operative connection with a gearbox (34) which causes the pump jack to undergo reciprocating motion. The motor/pump is a rotary type positive displacement motor/pump that is in closed liquid connection with the pump/motor liquid inlet of the pump motor. The pump/motor is operable to deliver working liquid flow therefrom to drive the motor/pump at a selectively variable speed while the driver operates at a generally constant rotational speed. Return force which acts on the motor/pump during at least a portion of the pump jack cycle is operative to cause the motor/pump to urge working liquid toward the pump/motor which assists the driver in pump/motor operation.

A system for supplementing the electric power needed by a pump jack electric motor, thereby reducing the electric power purchased from the local utility or power supplier. The system comprises a solar photovoltaic system, or other forms of renewable energy, and regenerated power from the electric motor or drive. The system can be both “on-grid” and “off-grid.” Battery banks and capacitor banks may be used to store and provide energy.