Wells – With below and above ground modification – Eduction pump or plunger in well
Patent
1992-09-25
1994-07-12
Neuder, William P.
Wells
With below and above ground modification
Eduction pump or plunger in well
166 78, F04B 4704
Patent
active
053279611
ABSTRACT:
A drive head for a downhole rotary pump operated by a drive string rotatable in a production string includes a hollow rotatable drive shaft having an axial bore for a polished rod, a housing attachable to a wellhead assembly, radial bearings centering the drive shaft in the housing and one axial thrust bearing to support the weight of the drive shaft and the drive string suspended therefrom. A pulley mounted on the shaft for the driving of the drive shaft, which includes a chuck arrangement for the concentrical clamping of the polished rod in the drive shaft. The drive head is used in combination with a polished rod clamp which is affixed to the polished rod for the suspending of the weight of the drive string and rests on top of the chuck arrangement. This construction substantially prevents polished rod wobble and the associated stuffing box leakage as well as accidental downward slippage of the drive string which could lead to serious damage of the downhole pump.
REFERENCES:
patent: 2471198 (1949-05-01), Cormany
patent: 2739790 (1956-03-01), Ball
patent: 3128614 (1964-04-01), Auer
patent: 3891031 (1975-06-01), Ortiz
patent: 4087211 (1978-05-01), Pochyly
patent: 4089624 (1978-05-01), Nichols et al.
patent: 4314611 (1982-02-01), Willis
patent: 4372379 (1983-02-01), Kulhanek et al.
patent: 4480685 (1984-11-01), Gilbertson
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