Patent ID: 7635022

Claim:
A pumping system for a wellhead comprising in combination: (a) an electric motor; (b) a pump basement and a support bracket wherein the support bracket is vertically fixed onto a connection end of the basement and also to a wellhead; (c) multiple fixed pulleys fixed generally in the same plane as the top end of the support bracket; (d) the electric motor and a speed reducer being successively fixed on a lower end of the support bracket; (e) an end head of an output shaft of the speed reducer being connected with a pivotable crank pivoted for circular motion when the output shaft is driven by the electric motor; (f) a top end head of the crank being connected with at least a movable pulley that is movable during operation of the pumping system and that is generally in the same plane as the fixed pulleys; (g) a flexible driving element vertically hung in said wellhead being successively wound across two of the fixed pulleys, the movable pulley(s), and a third fixed pulley then locked at one end onto the basement; and, (h) another end of the flexible driving element being downwardly connected to a plunger of a wellhead canned pump and to a plunger of a downhole oil well pump such that the circular motion of the crank is directly converted into up and down reciprocal motion of the flexible driving element thereby driving the plungers of the pumps.