Wells – Brushing – scraping – cutting or punching-type cleaners – On sucker rod
Patent
1988-06-16
1991-02-26
Neuder, William P.
Wells
Brushing, scraping, cutting or punching-type cleaners
On sucker rod
E21B 3702
Patent
active
049954598
ABSTRACT:
A device used in oil wells having a cylindrical, central body with six longitudinal ribs extending radially to an outside diameter that contacts the inner wall of the tubing and acts as a sucker rod guide and paraffin scraper during the reciprocating action of the rod string. Three ribs at each end of the invention are radially space 120 degrees apart forming a triad that leaves three flow channels of the same size and spacing as the ribs. The three ribs at each end are geometrically the same, but they are rotated to fully cover or offset the flow channels, thereby effecting a full 360 degrees of guiding, bushing, and scraping action. Each rib has a sharply pointed wedge, aimed towards the flow channel that it offsets, to scrape and direct material through the channels into the general flow of oil up the well, the invnetion will be injection molded of plastic, having two different styles. One style, called a "mold-on" scraper and guide, will be molded directly to the sucker rod at spaced intervals. The other style, called a "field-installed" scraper and guide, has two identical halves that interfit around the outer diameter of the rod. Two semi-circular rod channels, one in each half, forms a bore to accept the rod; and as the two halves slide together, two inclined planes, acting as wedges, increasingly tighten the halves over the rod diameter to fasten securely and resist slippage.
REFERENCES:
patent: 3058524 (1962-10-01), Tripplehorn
patent: 3438404 (1969-04-01), Tripplehorn
patent: 3537519 (1970-11-01), Long
patent: 4589483 (1986-05-01), Sable
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