B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
103/142
B66B 5/26 (2006.01) F04B 47/02 (2006.01)
Patent
CA 1333546
A long stroke well pumping unit including a drive motor, a pulley and band assembly, a carriage assembly, a counterweight assembly and a belt and pulley assembly. The pulley and band assembly includes first and second pulleys and a continuous band which extends between and engages the pulleys. One of the pulleys is driven by the drive motor. The pulleys are spaced vertically. The carriage assembly includes a block base, wheels rotatably attached to the block base and an outer frame. The block base is swivelly connected to the continuous band. The wheels rotatably engage the interior of the frame. The counterweight assembly is fixedly attached to the frame. The belt and pulley assembly has first and second ends, the first end being attached to the counterweight and the second being attachable to a polish rod assembly. As the well pumping unit operates, the drive motor drives the band around the pulleys. Since the block base is connected to the band, it also travels in a loop around the pulleys. This causes the carriage assembly, and thus the counterweight assembly and the polish rod assembly to be driven in a vertical reciprocating motion. During this movement, the block base and wheels move back and forth within the frame.
604849
Borden Ladner Gervais Llp
Evi-Highland Pump Company
LandOfFree
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