Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1991-03-19
1992-04-21
Braun, Leslie A.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
417411, F04B 4702
Patent
active
051056712
ABSTRACT:
A well pumping unit utilizing a walking beam that is longitudinally adjustable in length in order to vary the ratio of the length between the fulcrum point of the beam and the end of the beam connected with a pump rod as compared to the length of the beam between the pivot point and the point at which force is applied to the beam to oscillate it about the pivot point. By telescopically adjusting the walking beam and at the same time moving the power unit connected with the walking beam, the beam can be balanced to enable minimum energy to be applied to the beam to operate a downhole pump. The length of the connecting rod which connects a rotating eccentric powered by a power unit to the walking beam is adjustable in length to compensate for variations in movement of the pump rod resulting from longitudinal adjustment of the beam. The use of the unique features of this invention enables the horsepower requirements of a pump jack to be materially reduced with this invention inquiring a smaller electric motor or other power unit such as a one hoursepower unit as compared to a 3 to 5 horsepower unit normally employed on a pump jack.
REFERENCES:
patent: 4487061 (1984-12-01), McTamaney et al.
patent: 4502343 (1985-03-01), Dingfelder
patent: 4572012 (1986-02-01), Laney
patent: 4586879 (1986-05-01), Slater
patent: 4603592 (1986-08-01), Siebold et al.
patent: 4631970 (1986-12-01), Pauls
patent: 4788873 (1988-12-01), Laney
Braun Leslie A.
Trousdell William O.
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