Subsurface control valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

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Details

166124, 166128, 166152, 166145, E21B 3412

Patent

active

043723888

ABSTRACT:
A subsurface control valve for use in shutting off a well bore. The valve comprises a valve assembly and a stinger assembly, which is run into the well bore on drill pipe with a packer placed below the valve in the string. The valve is open as the string is run into the well bore, the packer then being set, and a sliding valve in the tool being closed by a plurality of rotations of the stinger assembly, which is removed from the well bore after the sliding valve is closed. To re-open the sliding valve, the stinger assembly is run back into the well bore, into the valve assembly, and rotated a number of times in the opposite direction. The present invention includes a spring-loaded stinger to constantly bias the stinger into engagement with the sliding valve and a bearing on the stinger assembly to facilitate alignment and rotation between the stinger assembly and valve assembly so as to limit the torque applied to the valve assembly.

REFERENCES:
patent: 3253655 (1966-05-01), Brown
patent: 3306363 (1967-02-01), McZilkey, Jr.
patent: 3306366 (1967-02-01), Muse
patent: 3356140 (1967-12-01), Young
patent: 3570595 (1971-03-01), Berryman
patent: 4253521 (1981-03-01), Savage
patent: 4290484 (1981-09-01), Beall
Specifications of Halliburton "model 2 RTTS" and SSC valve from pp. 3476-3477, 3485 of Halliburton Catalog.

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