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Patent Searching and Data


Title:
HYDRAULIC OIL WELL PUMP DRIVE SYSTEM
Document Type and Number:
WIPO Patent Application WO1993018306
Kind Code:
A3
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.

Inventors:
STANLEY LLOYD (CA)
Application Number:
PCT/CA1993/000085
Publication Date:
January 06, 1994
Filing Date:
March 01, 1993
Export Citation:
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Assignee:
STANLEY LLOYD (CA)
International Classes:
F04B9/105; F04B47/04; F04B53/00; F04B53/16; (IPC1-7): F04B47/04; F04B21/08
Foreign References:
US2526388A1950-10-17
US2144186A1939-01-17
NL7806575A1979-12-21
US4762473A1988-08-09
GB438395A1935-11-15
US2838910A1958-06-17
GB2091817A1982-08-04
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