Valve closing method and apparatus for use with an oil well valv

Details Valve closing method and apparatus for use with an oil well valv Valve closing method and apparatus for use with an oil well valv

1977-12-19

1979-03-20

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

166315, 166324, 166332, 166336, 251 58, 251 62, E21B 4312, E21B 4700

Patent

active

041449371

ABSTRACT:
Disclosed is a tester valve having a ball valve rotatable between the open and closed positions for use with a test string to test an oil well. The apparatus includes a ball closing piston in the valve operating mechanism which assists in rotating the ball to the closed position. One side of the ball closing piston is exposed to a first pressure of formation fluid flowing through the interior of the test string on the upstream side of the ball valve. The other side of the piston is exposed to a second pressure which is lower than the first pressure by a pressure drop caused as the fluid flows through the apparatus past the ball being rotated to the closed position. A bypass mechanism is additionally disclosed which is operable for equalizing the pressure on both sides of the ball closing piston when the ball is being rotated to the open position.

REFERENCES:
patent: RE28131 (1974-08-01), Leutwyler
patent: 3856085 (1974-12-01), Holden et al.
patent: 3865141 (1975-02-01), Young
patent: 3868995 (1975-03-01), Crowe
patent: 3901321 (1975-08-01), Mott
patent: 3964544 (1976-06-01), Farley et al.
patent: 3976136 (1976-08-01), Farley et al.
patent: 4064937 (1977-12-01), Barrington
patent: 4076077 (1978-02-01), Nix et al.

Affiliated with

Also associated with

Rating

Valve closing method and apparatus for use with an oil well valv does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Valve closing method and apparatus for use with an oil well valv, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve closing method and apparatus for use with an oil well valv will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-216637