Process and device for hydraulically and selectively controlling

Details Process and device for hydraulically and selectively controlling Process and device for hydraulically and selectively controlling

1989-01-27

1990-08-07

Novosad, Stephen J.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166 664, 166321, 166 651, 166381, E21B 3410, E21B 4312, F16K 326, F16K 31163

Patent

active

049459953

ABSTRACT:
A process and device for hydraulically and selectively controlling, in two circulation directions, at least two tools or instruments connected to a casing located inside a well. A first hydraulic line is provided which includes branches to a first and a second of the two tools or instruments, with a distribution arrangement being adapted to modify a circulation of fluid in each of the branches and to enable an independent control, and with a hydraulic power generator being connected to the first hydraulic line. To selectively activate the first tool or instrument, the distribution arrangement of the second tool or instrument are shut off in order to reduce fluid circulation in the branch of the second tool or instrument, the distribution arrangement of the first tool or instrument are opened in order to increase fluid circulation of the branch of the first tool or instrument, and pressure is applied in the first hydraulic line in order to create a flow of fluid in the first direction in the branch of the first tool or instrument.

REFERENCES:
patent: 2770308 (1956-11-01), Saurenman
patent: 3092135 (1963-06-01), Brown et al.
patent: 3319717 (1967-05-01), Chenoweth
patent: 3371717 (1968-03-01), Chenoweth
patent: 4330039 (1982-05-01), Vann et al.
patent: 4574894 (1986-03-01), Jadwin
patent: 4660647 (1987-04-01), Richart
patent: 4771831 (1988-09-01), Pringle et al.
patent: 4796699 (1989-01-01), Upchurch

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