Drill pipe tester and safety valve

Details Drill pipe tester and safety valve Drill pipe tester and safety valve

1980-04-03

1982-03-16

Pate, III, William F.

Wells

Processes

With indicating, testing, measuring or locating

166332, 166321, 251 77, E21B 3408

Patent

active

043196330

ABSTRACT:
A drill pipe tester valve includes a spherical valve member supported from an upward facing surface of a housing so that downward forces exerted on the valve member in its closed position, due to fluid pressure in a string of pipe above the valve member, are transmitted substantially entirely to said housing. A latching device is provided for latching the spherical valve member in its closed position as the string of pipe and tester valve are lowered into a well and for subsequently releasing the spherical valve member and allowing it to move to its open position when the string of pipe and tester valve are finally positioned within the well.

REFERENCES:
patent: 3347318 (1967-10-01), Barrington
patent: 3509913 (1970-05-01), Lewis
patent: 3667505 (1972-06-01), Radig
patent: 4042033 (1977-08-01), Holland et al.
patent: 4197879 (1980-04-01), Young
patent: 4212355 (1980-07-01), Reardon
patent: 4230185 (1980-10-01), Fredd

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