Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1985-05-20
1987-04-28
Staab, Lawrence J.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
F04B 4702
Patent
active
046604260
ABSTRACT:
A pumping unit for actuating a down hole pump is disclosed for a pumping units of the type wherein a counterweight is mounted on a beam to balance a down hole load consisting substantially of pump rods. One end of the beam includes a static counterweight to balance the other end of the beam about a center pivot point, the other end of the beam including a horsehead connected to the pump rods. A prime mover is mounted on the beam for rotating beam mounted cranks including at a terminal end thereof dynamic counterweights which move in a rotational cycle in conjunction with a pumping cycle of the pumping unit. The dynamic counterweights, at a maximum lever arm from the center pivot point of the beam, counterbalance the fluid being pumped during the work stroke of the pumping unit. As the dynamic counterweight rotates it passes through a minimum lever arm from the center point corresponding to a minimum down hole load. The rotational cycle of the second counterweight is timed to correspond with the pumping cycle, maximizing the counterweight effect during a work stroke and minimizing the counterweight that must be raised by the prime mover during a return stroke.
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Catalog of Lufkin Industries, Inc. showing a conventional pumping unit and other variations on the conventional pumping unit.
Anderson Gregg I.
Infinity Pumping Systems
Staab Lawrence J.
LandOfFree
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