Wells – Brushing – scraping – cutting or punching-type cleaners – Reciprocable relative to central member extending from well top
Patent
1980-06-09
1982-09-21
Leppink, James A.
Wells
Brushing, scraping, cutting or punching-type cleaners
Reciprocable relative to central member extending from well top
166176, 175323, 175406, E21B 3702
Patent
active
043502040
ABSTRACT:
A reamer for removing paraffin, scale, ice and other accumulations from the inside surfaces of oil well pump tubing and casing which includes a hollow, tapered shell or housing fitted with external blades and having an enlarged upper internal bore area to accommodate a threaded lock nut, and a threaded shaft projecting into the housing cavity in threadable cooperation with the lock nut and provided with stops to permit limited rotation of the shell on the shaft and to prevent the shaft from exiting the shell when fully extended from the shell on the lock nut. When the reamer is lowered by means of a wire line and swivel joint into a length of tubing or casing to the constricted area, and the shaft is extended in the shell, a repetitive impact load on the projecting end of the shaft effects rotation of the shell and blades on the shaft to remove the deposits. When the shell rotatably progresses to a fully threaded position on the shaft responsive to the impact load, upward pressure is then exerted on the shaft by means of the wire line, and the shaft rotates upwardly on the lock nut to the former position of full extension in the shell, where the load is again applied. A threaded shaft and cooperating lock nut for either clockwise or counter-clockwise rotation of the tapered shell can be used in the reamer, and the blades can be removed and the counter-clockwise shell rotation used to loosen tubing in the well.
REFERENCES:
patent: 1479132 (1924-01-01), Gianella
patent: 1497479 (1924-06-01), Booth
patent: 2145190 (1939-01-01), Nay
patent: 2679905 (1954-06-01), Mangum et al.
patent: 2728556 (1955-12-01), House
patent: 2980423 (1961-04-01), Parkhurst
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