Well pumping unit

Details Well pumping unit Well pumping unit

F - Mech Eng,Light,Heat,Weapons

04

B

103/142

F04B 47/02 (2006.01)

Patent

CA 1280934

ABSTRACT A pumping unit is disclosed having a shorter base frame than conventional pumping units and interchangeable crank arms, while retaining a relatively low net peak torque requirement obtained through a slower upstroke and a faster downstroke. These advantages can be obtained in both the rear mounted and front mounted geometry systems with crank counterbalance. The axis of the wrist pin connection between the pitman and the crank intersects a straight line direction extending through the center of gravity of the counterweight and along the axis of the crank arm to an intersection with the axis of the motor-driven spindle which rotates the crank arm. This feature permits interchange of crank arm castings in a dual crank arm unit since each casting is identical.

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