Bypass valve

Details Bypass valve Bypass valve

1991-04-30

1993-03-16

Neuder, William P.

Wells

Processes

Placing or shifting well part

166317, 166332, 166145, E21B 3408

Patent

active

051936216

ABSTRACT:
A bypass valve for bypassing well fluids, and method of use thereof. The valve comprises a tubular housing defining a bypass port therethrough with an inner sleeve mandrel defining a bypass port initially aligned with the bypass port in the housing. The valve also comprises a power mandrel slidably disposed within the housing such that, as weight is set down on the power mandrel, pressure is increased in a first oil chamber which has a rupture disc in communiction therewith. When the pressure reaches a predetermined level, the rupture disc ruptures so that the oil chamber is emptied into the well annulus. This allows the power mandrel to move and strike an operating mandrel which is also slidably disposed in the housing. The jarring force shears a shear pin which allows the operating mandrel to move a floating piston disposed in a second oil chamber. A metering cartridge restricts flow of fluid out of the second metering chamber, thereby providing a time delay for movement of the operating mandrel. The operating mandrel eventually contacts the sleeve mandrel and moves it with respect to the housing so that the bypass ports are no longer aligned, thereby closing the valve.

REFERENCES:
patent: 2740479 (1956-04-01), Schwegman
patent: 2751014 (1956-06-01), Johnston et al.
patent: 3066738 (1962-12-01), Myers
patent: 3351133 (1967-11-01), Clark, Jr. et al.
patent: 3361207 (1968-01-01), Chenoweth
patent: 4270610 (1981-06-01), Barrington
patent: 4281715 (1981-08-01), Farley
patent: 4311197 (1982-01-01), Hushbeck
patent: 4319633 (1982-03-01), McMahan et al.
patent: 4582140 (1986-04-01), Barrington
patent: 4907655 (1990-03-01), Hromas et al.
patent: 4911242 (1990-03-01), Hromas et al.

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