초록 ▼

A rotationally activated downhole well valve for connection in a tubing string is disclosed that can be repeatedly opened and closed selectively to place the tubing string in communication with the annulus. The valve is moved between the closed position and the open position by rotating the string i

A rotationally activated downhole well valve for connection in a tubing string is disclosed that can be repeatedly opened and closed selectively to place the tubing string in communication with the annulus. The valve is moved between the closed position and the open position by rotating the string in the first direction.

대표청구항 ▼

1. A valve for use in a tubing string extending to a subterranean location in a wellbore for connecting and disconnecting the interior of the tubing string with the surrounding wellbore, when the tubing string is rotated in one direction, comprising: a tubular-shaped body, a passageway in the body b

1. A valve for use in a tubing string extending to a subterranean location in a wellbore for connecting and disconnecting the interior of the tubing string with the surrounding wellbore, when the tubing string is rotated in one direction, comprising: a tubular-shaped body, a passageway in the body between the exterior and interior of the body, means on the body for connecting the valve to the tubing string with the valve's interior in fluid communication with the tubing string;a valve on the body comprising a valve element mounted therein for movement between closed positions blocking flow through the passageway and open positions permitting flow through the passageway is open;a double-acting piston reciprocal in a cylinder in the valve body for moving the element between positions;a pump connected to the tubing string to pump fluids when the tubing string is rotated in the one direction;a valve shiftable between a position supplying fluid one side of the piston to move the piston and valve element into one position and a position supplying fluid to the other side of the piston to move the piston and valve element into another element, anda valve actuator shifting the valve between positions after rotation of the tubing string is initiated and then stopped. 2. The valve of claim 1, wherein the valve element is a sleeve. 3. The valve of claim 2, wherein the sleeve is axially movable with respect to the passageway between the closed and open positions in response to rotation of the tubing string in a first direction. 4. The valve of claim 1, wherein the valve element is mounted to move axially into and out of positions blocking the passageway. 5. A valve for use in a tubing string extending to a subterranean location in a wellbore for connecting and disconnecting the interior of the tubing string with the surrounding wellbore, comprising: a tubular-shaped body, a passageway in the body between the exterior and interior of the body, threads on the body for connecting the valve to the tubing string with the valve's interior in fluid communication with the tubing string;a valve on the body comprising a valve element mounted therein for movement between closed positions blocking flow through the passageway and open positions, permitting flow through the passageway;a pump on the valve body for connection to move with rotation of the tubing string, the pump having a pressurized fluid output;a piston operability associated to move with the valve element; the piston mounted to reciprocate in a chamber in the valve body, the piston dividing the chamber into two sub-chambers;a two-position control valve connected to the pressurized fluid output of the pump and said sub-chambers, the control valve movable between a positions supplying pressurized fluid selectively to one or the other of said sub-chambers to cause the piston to reciprocate in the chamber; anda valve shifter connected to the pump output, the shifter movable into an energized position when said pump is operating and movable into a nonenergized position when said pump is not operating, the shifter connected to the control valve to shift the control valve only when said shifter moves from the energized position to the nonenergized position. 6. The valve of claim 5, wherein the valve element is mounted to move axially with respect to the passageway. 7. The valve of claim 5, wherein the valve element is a sleeve. 8. The valve of claim 7, wherein the sleeve is mounted to move axially into and out of positions blocking the passageway. 9. The valve of claim 5, wherein the valve element is mounted to move axially into and out of positions blocking the passageway.