Well flow device

Details Well flow device Well flow device

1989-02-21

1990-04-10

Dang, Hoang C.

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

166115, 166131, 166184, 166240, 166324, E21B 3414

Patent

active

049151754

ABSTRACT:
A sliding sleeve valve well flow control device having a tubular nipple connectable in a well tubing string and side ports for flow into the nipple and a retrievable pack-off sleeve insertable into the nipple for closing the side ports, the sleeve including an equalizing port and J-slots for coacting with a guide lug in the nipple to position the sleeve at an equalizing position prior to retrieving the sleeve from the nipple to minimize the damage to seals around the retrievable sleeve.

REFERENCES:
patent: 3051243 (1962-08-01), Grimmer et al.
patent: 3151681 (1964-10-01), Cochran
patent: 3395758 (1968-08-01), Kelly et al.
patent: 4462465 (1984-07-01), Strickland

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