F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/142
F04B 47/02 (2006.01)
Patent
CA 1299018
A B S T R A C T 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 wellhead. 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 plane of the wellhead so that true reciprocating movement is imparted to the polished rod. The pumping unit can be adapted to pump slant hole wells by inclining the front and rear post toward the wellhead such that the resultant forces exerted on the rollers by the rod string load fall within the angle subtended by the front and rear posts. The rear post may be adjustable in length, so that a single unit can pump wells at different angles to the vertical.
526257
Ridout & Maybee Llp
Weatherford/lamb Inc.
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