Crossover tool

Details Crossover tool Crossover tool

1979-12-27

1981-10-27

Leppink, James A.

Wells

Packers or plugs

With controllable passage between central conduit and space...

166334, 166240, 166150, E21B 33124

Patent

active

042968070

ABSTRACT:
A crossover tool for use with concentric tubing strings. The apparatus disclosed provides the ability to treat and/or gravel pack a producing zone in a well, and is particularly suited for use in a multiple-zone well. The crossover tool may be locked in any one of three positions: a circulate mode, a closed test mode, or a closed bypass mode to facilitate movement of the tool within the well bore. All operation of the crossover tool is effected by reciprocation of the pipe string to which it is attached. Alternative embodiments are also disclosed which dispense with the closed test mode.

REFERENCES:
patent: 2649916 (1953-08-01), Brown
patent: 2738012 (1956-03-01), Springer
patent: 3637010 (1972-01-01), Maly
patent: 3710862 (1973-01-01), Young et al.
patent: 3726343 (1973-04-01), Davis, Jr.
patent: 3797572 (1974-03-01), Mignotte
patent: 3926409 (1975-12-01), Abney et al.
patent: 4044832 (1977-08-01), Richard et al.

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