Method of operating a subsurface safety valve in response to an

Details Method of operating a subsurface safety valve in response to an Method of operating a subsurface safety valve in response to an

Filed on

1976-01-07

Date issued

1977-06-21

Examiner

Leppink, James A.

Patent Class

Wells

SubClass

Valves, closures or changeable restrictors

Other Related Categories

137458, 166322, E21B 4312

Type

Patent

Status

active

Patent number

040305503

Description

ABSTRACT:
A subsurface safety valve well tool securable in a well conduit for controlling flow of fluid through the bore of the conduit. An increase or decrease in the well pressure from the normal flowing pressure of the well operates a rotatable ball valve to block flow of fluid through the conduit. Increasing and then decreasing the pressure in the bore above the ball valve rotates the valve to enable flow of fluid through the conduit.

REFERENCES:
patent: 3050132 (1962-08-01), Page
patent: 3071151 (1963-01-01), Sizer
patent: 3310114 (1967-03-01), Dollison
patent: 3410346 (1968-11-01), Garrett et al.
patent: 3768506 (1973-10-01), McGill

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