Flapper type annulus pressure responsive tubing tester valve

Details Flapper type annulus pressure responsive tubing tester valve Flapper type annulus pressure responsive tubing tester valve

1986-06-20

1987-09-22

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

73 405R, 166317, 166323, 166374, 166386, E21B 4710, E21B 3410

Patent

active

046949038

ABSTRACT:
The tubing tester valve of the present invention comprises a tubular housing assembly having a downwardly closing, spring biased flapper valve disposed therein near the top thereof. A tubular mandrel assembly is disposed within the housing assembly below the flapper valve, and is secured to the housing assembly with shear pins. The tubing tester valve may be permanently opened through the application of annulus pressure from the rig floor to the annulus surrounding the pipe string, which pressure moves the mandrel assembly upward to rotate the flapper valve to an open position. In order to assure that the mandrel assembly does not retract downwardly, thus permitting the flapper valve to reclose, a spring biased locking means is provided to hold the mandrel assembly in its "up" position.

REFERENCES:
patent: 2742093 (1956-04-01), Vaughn
patent: 3329007 (1967-07-01), Conrad
patent: 3332495 (1967-07-01), Young
patent: 3470903 (1969-10-01), Scott
patent: 3779263 (1973-12-01), Edwards et al.
patent: 4100969 (1978-07-01), Randermann
patent: 4122898 (1978-10-01), Nelson
patent: 4161985 (1979-07-01), Fournier et al.
patent: 4295361 (1981-10-01), McMahan
patent: 4319633 (1982-03-01), McMahan
patent: 4319634 (1982-03-01), McMahan
patent: 4421172 (1983-12-01), McMahan
patent: 4458762 (1984-07-01), McMahan
patent: 4475599 (1974-10-01), Akkerman
patent: 4609005 (1986-09-01), Upchurch
Publication by Baker Oil Tools on a Model "S" Full-Bore Tubing Tester, dated Sep. 15, 1975.

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