Pumping unit
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United States of America Patent
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-
Dec 30, 1986
Grant Date -
N/A
app pub date -
Apr 22, 1983
filing date -
Apr 22, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pumping unit for pumping fluids from a location beneath the surface of a field. The rotary motion of a crankarm is changed to a reciprocating motion of a pair of flexible members by pitman arms pivotally secured at one end to the crankarm and at the other end to the flexible members which extend from such connection over a plurality of rollers and then vertically downward toward the well head. The flexible members are connected at their other ends to means connected to the polished rod. Portions of the flexible members and the polished rod lie in the same vertical plane so that true vertical reciprocating movement is imparted to the polished rod. The flexible members comprise non-metallic straps having a substantial width to provide stability of movement.
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