CENTRALIZER-SCRAPER FOR DEEP OIL-WELL SUCKER-ROD PUMP Russian patent published in 1997 - IPC

Abstract RU 2093707 C1

FIELD: oil production; centering sucker-rod strings at simultaneous cleanout of tubes and rods from wax accumulation and hydrates operated by deep oil-well sucker-rod pumps. SUBSTANCE: centralizer-scraper includes housing with fins located at angle relative to its longitudinal axis and passages between them for flow of liquid being pumped cut. Fins have cylindrical contact surface. Housing is formed from similar parts in form of half-slips interconnected by means of wedge lock. Half-clips are connected in such way that end portion of one of them is engageable with opposite end portion of other half-clip. Fins are made in form of incomplete turns of spirals and angle of inclination to longitudinal axis of housing ranges from 30 to 60 deg. EFFECT: enhanced reliability. 2 dwg

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RU 2 093 707 C1

Authors

Borisov S.B.

Prokhorov N.N.

Dates

1997-10-20—Published

1996-08-20—Filed