Adjustable orifice valve

Details Adjustable orifice valve Adjustable orifice valve

1998-09-14

2000-12-12

Recla, Henry J.

Valves and valve actuation

With material guide or restrictor

Movable or resilient guide or restrictor

251 635, 166320, 1663321, F16K 31363

Patent

active

061587141

ABSTRACT:
The invention relates to valves usable downhole and controlled from the surface hydraulically via control lines or by other techniques. The valve has a minimum flow passage which is preferably oriented along its longitudinal axis and a lateral flow passage which opens upon movement of a valve member via applied control pressure from the surface. Alternatively, the valve comprises a tapered needle movable in a throat. When the valve member shifts, additional flow area is exposed to control the backpressure of a fluid by way of hydraulic pressure control from the surface via the control line. The hydraulic control can be with a single control line acting on a piston attached to the valve member with a return spring opposing such movement, or alternatively, can be carried out with a pair of control lines to actuate reverse movements of the valve member. A pressurized gas chamber can be used to act as the closing force opposing applied pressure from the control line for a return of the valve to its minimum flow or maximum throttle position. Alternatively, an acoustic, electric or other type of surface-directed signal can change the valve position.

REFERENCES:
patent: 3757816 (1973-09-01), Price
patent: 4723606 (1988-02-01), Vinzant et al.
patent: 4789132 (1988-12-01), Fujita et al.
patent: 4944350 (1990-07-01), Airey
patent: 5176164 (1993-01-01), Boyle
patent: 5618022 (1997-04-01), Wallace
patent: 5771974 (1997-04-01), Stewart et al.
patent: 5803167 (1998-09-01), Bussear et al.

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