Pumps – Motor driven – Spring or weight motor
Patent
1979-01-22
1981-09-01
Smith, Leonard E.
Pumps
Motor driven
Spring or weight motor
60639, 92 11, F04B 1700, F03G 304
Patent
active
042869285
ABSTRACT:
A pumping unit for removing oil or the like from a well. The unit comprises a tower, a sump at the bottom of the tower and a reservoir at an elevation above the sump. A liquid, such as oil or water, is pumped from the sump up to the reservoir. A wheel is mounted at the top of the tower above the reservoir for rotation, and a line extends over the wheel for attachment at one end to a polished rod load outside the tower and at its other end to a receptacle inside the tower serving as a counter weight for the polished rod load. The receptacle is reciprocally movable up and down in the tower between the reservoir and the sump, liquid being transferred from the reservoir to the receptacle as it approaches the reservoir in an amount sufficient to reverse the upward movement of the receptacle, causing it to descend in the tower, and liquid being transferred from the receptacle to the sump as the receptacle approaches the sump in an amount sufficient to reverse the downward movement of the receptacle, causing it to ascend in the tower.
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Hermann Robert R.
Smith Leonard E.
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