Valve for inflatable packer system

Details Valve for inflatable packer system Valve for inflatable packer system

1995-01-26

1996-08-27

Dang, Hoang C.

Wells

Processes

Placing or shifting well part

166129, 166185, 166187, 166323, 166387, E21B 33127

Patent

active

055491650

ABSTRACT:
A pressure limit valve for well tools where a valve member is moveable between a first closed portion, an open position and a second closed position. A spring for closing the valve is separated from a locking chamber which contains locking elements. The locking elements are located in a locking chamber and are held deactivated by a release sleeve which separates from the valve member in an open position. When the valve moves to the second closed position it is locked by engagement of the locking elements with a stop shoulder. In use between closely coupled inflatable packers, the valve prevents trapped pressure between the packers from affecting operation of the packer valve.

REFERENCES:
patent: Re32345 (1987-02-01), Wood
patent: 2227729 (1941-01-01), Lynes
patent: 4580632 (1986-04-01), Reardon
patent: 4653588 (1987-03-01), White
patent: 4749037 (1988-06-01), Christensen
patent: 4781249 (1988-11-01), Wood
patent: 5082062 (1992-01-01), Wood et al.
patent: 5297634 (1994-03-01), Loughlin
Davis Lynch Catalog, 1991, pp. 28, 29.

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