Hydraulic oil well pump drive system

Details Hydraulic oil well pump drive system Hydraulic oil well pump drive system

1997-03-06

1998-09-01

Footland, Lenard A.

Bearings

Linear bearing

Plain bearings

F16C 2902

Patent

active

058000631

ABSTRACT:
A hydraulic oil well pump drive system for driving an oil well sucker rod includes a wellhead hydraulic assembly that is operably connected to the oil well sucker rod to reciprocate the sucker rod. The wellhead hydraulic assembly includes a hydraulic cylinder and a rod that reciprocates linearly within the hydraulic cylinder. The rod has an upper end with a circumferential groove that receives a split cylindrical bearing. The split cylindrical bearing is has two semicircular halves retained within the groove by the inner walls of the cylinder. The halves are retained vertically, relative to the rod, by the groove itself.

REFERENCES:
patent: 4085796 (1978-04-01), Council
patent: 4289294 (1981-09-01), McLean
patent: 4712620 (1987-12-01), Lim et al.
patent: 5447026 (1995-09-01), Stanley

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