Pump jack system

Apparatus comprising:

• a rotary type variable output positive displacement pump/motor,
• wherein the pump/motor includes
• a rotatable input coupler configured to be in rotatable operative connection with a driver, wherein the driver is operative to cause driving rotation of the input coupler,
• a pump/motor liquid outlet,
• a pump/motor liquid inlet,
• wherein the pump/motor is operative to receive working liquid into the pump/motor liquid inlet and deliver working liquid from the pump/motor liquid outlet at a selectively variable flow rate,
• a rotary type positive displacement motor/pump, wherein the motor/pump includes
• a motor/pump liquid inlet,
• a motor/pump liquid outlet,
• a rotatable output coupler,
• wherein the rotatable output coupler is configured to be in operative connection with a pump jack operable to vertically reciprocate a sucker rod string, wherein the sucker rod string is in operative connection with a subsurface pump, wherein vertical reciprocation of the sucker rod string is operative to cause the pump to pump subterranean well liquid upward, wherein the pump jack repeatedly undergoes a cycle in which the sucker rod string moves downward and then upward,
• wherein the pump/motor liquid outlet is in closed liquid connection with the motor/pump liquid inlet and is operative to deliver working liquid to the motor/pump, and wherein the motor/pump liquid outlet is in closed liquid connection with the pump/motor liquid inlet and is operative to return working liquid to the pump/motor,
• wherein the motor/pump is operative responsive to the delivered working liquid to cause the output coupler to rotate in a first rotational direction, wherein the pump jack undergoes the cycle repeatedly responsive to rotation of the output coupler in the first rotational direction, and wherein during at least a portion of at least some cycles the pump jack is operative to cause a return force to be applied to the output coupler that acts to urge output coupler rotation in the first direction,
• wherein the return force is operative to cause the motor/pump to urge the return working liquid to move toward the pump/motor liquid inlet,
• wherein the return working liquid acts on the pump/motor to operatively assist the driver in driving rotation of the input coupler.

Apparatus comprising:

• a rotary type variable output positive displacement pump/motor,
• wherein the pump/motor includes
• a rotatable input coupler configured to be in rotatable operative connection with a driver, which driver is operative to cause driving rotation of the input coupler in an input coupler rotational direction,
• a pump/motor liquid outlet,
• a pump/motor liquid inlet,
• wherein the pump/motor is operative to receive working liquid into the pump/motor liquid inlet and deliver working liquid from the pump/motor liquid outlet at a selectively variable flow rate,
• a rotary type positive displacement motor/pump,
• wherein the motor/pump includes
• a motor/pump liquid inlet,
• a motor/pump liquid outlet,
• a rotatable output coupler,
• wherein the rotatable output coupler is configured to be in operative connection with a pump jack, wherein the pump jack is configured to be in operative connection with a vertically reciprocated sucker rod string that is in operative connection with a subsurface pump operative to upwardly pump subterranean well liquid, and a vertically reciprocated counterweight that is configured to cause upward force that acts on the sucker rod,
• a pump/motor output liquid line,
• wherein the pump/motor output liquid line extends in closed liquid connection between the pump/motor liquid outlet and the motor/pump liquid inlet,
• a motor/pump output liquid line,
• wherein the motor/pump output liquid line extends in closed liquid connection between the motor/pump liquid outlet and the pump/motor liquid inlet,
• wherein the motor/pump is operative responsive to delivered working liquid received through the pump/motor output liquid line to cause the output coupler to rotate continuously in an output coupler rotational direction and cause repeated reciprocated motion of the pump jack, the sucker rod string and the counterweight,
• wherein the reciprocated motion of the pump jack is operative to cause a return force to be applied on the output coupler that urges the output coupler to rotate in the output coupler rotational direction, wherein the return force is operative to cause the motor/pump to urge return working liquid to flow from the motor/pump liquid outlet, through the motor/pump output liquid line and to the pump/motor liquid inlet, whereby the return liquid flow operatively acts on the pump/motor to assist in rotation of the input coupler in the input coupler rotational direction by the driver.

Apparatus comprising:

• a rotary type variable output positive displacement pump/motor,
• wherein the pump/motor includes
• a rotatable input coupler configured to be in rotatable operative connection with a driver, wherein the driver is operative to continuously cause driving rotation of the input coupler in an input coupler rotational direction,
• a pump/motor liquid outlet,
• a pump/motor liquid inlet,
• wherein the pump/motor is operative to receive working liquid into the pump/motor liquid inlet and deliver working liquid from the pump/motor liquid outlet at a selectively variable flow rate,
• a rotary type positive displacement motor/pump, wherein the motor/pump includes
• a motor/pump liquid inlet,
• a motor/pump liquid outlet,
• a rotatable output coupler,
• wherein the rotatable output coupler is configured to be in operative connection with a pump jack operable to vertically reciprocate a sucker rod string, wherein the sucker rod string is in operative connection with a subsurface pump, wherein vertical reciprocation of the sucker rod string is operative to cause the pump to pump subterranean well liquid upward, wherein the pump jack repeatedly undergoes a cycle in which the sucker rod moves downward and then upward,
• wherein the pump/motor liquid outlet is in closed liquid connection with the motor/pump liquid inlet and is operative to continuously deliver working liquid to the motor/pump liquid inlet, and wherein the motor/pump liquid outlet is in closed liquid connection with the pump/motor liquid inlet and is operative to return working liquid to the pump/motor liquid inlet,
• wherein the motor/pump is operative responsive to the delivered working liquid to cause the output coupler to continuously rotate in an output coupler rotational direction, wherein the pump jack is caused to undergo the cycle repeatedly responsive to continuous rotation of the output coupler in the output coupler rotational direction, and wherein during at least a portion of at least some cycles the pump jack is operative to cause a return force to be applied to the output coupler that acts to urge output coupler rotation in the output coupler rotational direction,
• wherein the return force is operative to cause the motor/pump to force the return working liquid to flow toward the pump/motor liquid inlet,
• wherein the force of the return working liquid acts on the pump/motor to operatively assist in driving rotation of the input coupler in the input coupler rotational direction.

Apparatus comprising:

• a rotary type variable output positive displacement pump/motor,
• wherein the pump/motor includes
• a rotatable input coupler configured to be in rotatable operative connection with a driver, which driver is operative to cause driving rotation of the input coupler,
• a pump/motor liquid outlet,
• a pump/motor liquid inlet,
• wherein the pump/motor is selectively operative to
• receive working liquid into the pump/motor liquid inlet and deliver working liquid from the pump/motor liquid outlet at a selectively variable flow rate in a continuous range from a zero flow rate to a maximum flow rate while the input coupler continuously rotates responsive to the driving rotation at a generally constant rotational speed in a driving direction responsive to the driver, or
• deliver working liquid from the pump/motor liquid outlet at the selectively variable flow rate in a continuous reverse flow range from the zero flow rate to a maximum reverse flow rate, while the input coupler continuously rotates responsive to the driving rotation at the generally constant rotational speed in the driving direction,
• a rotary type positive displacement motor/pump,
• wherein the motor/pump comprises a fixed positive displacement motor pump, and includes
• a motor/pump liquid inlet,
• a motor/pump liquid outlet,
• a rotatable output coupler,
• wherein the rotatable output coupler is configured to be in operative connection with a pump jack, wherein the pump jack is in operative connection with a vertically reciprocated sucker rod string that is in operative connection with a subsurface pump operative to upwardly pump subterranean well liquid, and a vertically reciprocated counterweight that is configured to cause upward force that acts on the sucker rod string,
• a pump/motor output liquid line,
• wherein the pump/motor output liquid line extends in closed liquid connection between the pump/motor liquid outlet and the motor/pump liquid inlet,
• a motor/pump output liquid line,
• wherein the motor/pump output liquid line extends in closed liquid connection between the motor/pump liquid outlet and the pump/motor liquid inlet,
• wherein the motor/pump is operative responsive to delivered working liquid received through the pump/motor output liquid line to cause the output coupler to rotate in a first rotational direction, and cause reciprocated motion of the pump jack,
• wherein the pump jack is operative to apply a return force on the output coupler that urges the output coupler to rotate in the first direction, wherein the return force is operative to cause the motor/pump to urge return working liquid to flow from the motor/pump liquid outlet, through the motor/pump output liquid line and to the pump/motor liquid inlet, whereby the return liquid operatively acts on the pump/motor to assist the driver in driving rotation of the input coupler,
• at least one controller, and
• at least one manual input device,
• wherein the at least one controller is in operative connection with the pump/motor and the at least one manual input device,
• wherein at least one manual input to the at least one manual input device is operative to cause the at least one controller to operate to cause the pump/motor to selectively deliver from the pump/motor liquid outlet, a fixed flow rate of working liquid anywhere within the range while the input coupler continuously rotates at the generally constant rotational speed in the driving direction,
• wherein at least one further manual input to the at least one manual input device is operative to cause the at least one controller to operate to cause the pump/motor to selectively deliver from the pump/motor liquid outlet, the fixed flow rate within the reverse flow range while the input coupler continuously rotates at the generally constant rotational speed in the driving direction,
• wherein working liquid flow in the reverse flow range above the zero flow rate is operative to cause the rotatable output coupler to rotate in a second rotational direction opposed of the first rotational direction,
• whereby the pump jack operates to cause the sucker rod string and the counterweight to vertically reciprocate when the rotatable output coupler rotates in the second rotational direction.

Apparatus comprising:

• a rotary type variable output positive displacement pump/motor,
• wherein the pump/motor includes
• a rotatable input coupler configured to be in rotatable operative connection with a driver, which driver is operative to cause driving rotation of the input coupler,
• a pump/motor liquid outlet,
• a pump/motor liquid inlet,
• wherein the pump/motor is operative to receive working liquid into the pump/motor liquid inlet and deliver working liquid from the pump/motor liquid outlet at a selectively variable flow rate,
• a rotary type positive displacement motor/pump,
• wherein the motor/pump includes
• a motor/pump liquid inlet,
• a motor/pump liquid outlet,
• a rotatable output coupler,
• wherein the rotatable output coupler is configured to be in operative connection with a pump jack, wherein the pump jack is in operative connection with a vertically reciprocated sucker rod string that is in operative connection with a subsurface pump operative to upwardly pump subterranean well liquid, and a vertically reciprocated counterweight that is configured to cause upward force that acts on the sucker rod string,
• a pump/motor output liquid line,
• wherein the pump/motor output liquid line extends in closed liquid connection between the pump/motor liquid outlet and the motor/pump liquid inlet,
• a motor/pump output liquid line,
• wherein the motor/pump output liquid line extends in closed liquid connection between the motor/pump liquid outlet and the pump/motor liquid inlet,
• wherein the motor/pump is operative responsive to delivered working liquid received through the pump/motor output liquid line to cause the output coupler to rotate in a first rotational direction and cause reciprocated motion of the pump jack, wherein the pump jack is operative to apply a return force on the output coupler that urges the output coupler to rotate in the first rotational direction, wherein the return force is operative to cause the motor/pump to urge return working liquid to flow from the motor/pump liquid outlet, through the motor/pump output liquid line and to the pump/motor liquid inlet, whereby the return liquid operatively acts on the pump/motor to assist the driver in driving rotation of the input coupler,
• a control stand,
• a working liquid/air heat exchanger in operative supported connection with the control stand, wherein the heat exchanger is in operative liquid connection with the pump/motor,
• a control panel, wherein the control panel is in operative supported connection with the control stand, wherein the control panel houses at least a portion of at least one controller, wherein the at least one controller is in operative connection with the at least one pump/motor,
• at least one fan, wherein the at least one fan is in operative supported connection with the control stand,
• wherein the at least one fan is operative to both move air over the control panel to cool the control panel and move air through the heat exchanger to cool the working liquid.

Apparatus comprising:

• a rotary type variable output positive displacement pump/motor,
• wherein the pump/motor includes
• a rotatable input coupler configured to be in rotatable operative connection with a driver, which driver is operative to cause driving rotation of the input coupler,
• a pump/motor liquid outlet,
• a pump/motor liquid inlet,
• wherein the pump/motor is operative to receive working liquid into the pump/motor liquid inlet and deliver working liquid from the pump/motor liquid outlet at a selectively variable flow rate,
• a rotary type positive displacement motor/pump,
• wherein the motor/pump includes
• a motor/pump liquid inlet,
• a motor/pump liquid outlet
• a rotatable output coupler,
• wherein the rotatable output coupler is configured to be in operative connection with a pump jack, wherein the pump jack is in operative connection with a vertically reciprocated sucker rod string that is in operative connection with a subsurface pump operative to upwardly pump subterranean well liquid, and a vertically reciprocated counterweight that is configured to cause upward force that acts on the sucker rod,
• a pump/motor output liquid line,
• wherein the pump/motor output liquid line extends in closed liquid connection between the pump/motor liquid outlet and the motor/pump liquid inlet,
• a motor/pump output liquid line,
• wherein the motor/pump output liquid line extends in closed liquid connection between the motor/pump liquid outlet and the pump/motor liquid inlet,
• wherein the motor/pump is operative responsive to delivered working liquid received through the pump/motor output liquid line to cause the output coupler to rotate in a first rotational direction, which rotation of the output coupler in the first rotational direction is operative to cause reciprocated vertical motion of the sucker rod string in operative connection with the pump jack,
• wherein the pump jack is operative to apply a return force on the output coupler that urges the output coupler to rotate in the first rotational direction, wherein the return force is operative to cause the motor/pump to urge return working liquid to flow from the motor/pump liquid outlet, through the motor/pump output liquid line and to the pump/motor liquid inlet, whereby the return liquid operatively acts on the pump/motor to assist the driver in driving rotation of the input coupler,
• a first manually closable lockout valve, wherein the first lockout valve is in direct liquid connection with the motor/pump liquid inlet,
• a second manually closable lockout valve, wherein the second manually closable lockout valve is in direct liquid connection with the motor/pump liquid outlet,
• wherein with both the first lockout valve and the second lockout valve closed the rotatable output coupler is caused to be fluidly locked in position.