Wells – Brushing – scraping – cutting or punching-type cleaners – On sucker rod
Patent
1994-09-19
1995-09-26
Britts, Ramon S.
Wells
Brushing, scraping, cutting or punching-type cleaners
On sucker rod
1662412, E21B 3702
Patent
active
054527600
ABSTRACT:
A well pump sucker rod scraper arrangement that includes a sucker rod, scrapers fixed to said rod and a scraper at spaced apart positions movably mounted on said rod, between adjacent pairs of the fixed scrapers. The movable and fixed scrapers each have surfaces at respective opposite ends thereof and an outer fluted surface. The fluted surface is defined by spaced apart ribs and the ribs on the movable scraper are angularly disposed relative to the longitudinal axis of the rod. The movable scraper has a slot lengthwise thereof with a throat portion whose width is narrower than the diameter of the rod and through which the rod passes when pressing such movable scraper onto the rod. A lug on the fixed scrapers project therefrom in a direction toward an adjacent movable scraper and the lugs are so positioned so as to project into said slot of a movable scraper associated therewith as the latter approaches the fixed scraper and prior to engagement of the abutting planar end surfaces on the respective scrapers.
REFERENCES:
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patent: 4995459 (1991-02-01), Mabry
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patent: 5339896 (1994-08-01), Hart et al.
Britts Ramon S.
Enterra Patco Oilfield Products Limited
Johnson Stanley E.
Tsay Frank S.
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