A system and methodology facilitates utilization of a valve of a type which may be used as a subsea test tree. The valve comprises a valve element pivotably mounted in a housing having a passageway therethrough. The valve element may be actuated between an open position and a closed position blockin
A system and methodology facilitates utilization of a valve of a type which may be used as a subsea test tree. The valve comprises a valve element pivotably mounted in a housing having a passageway therethrough. The valve element may be actuated between an open position and a closed position blocking the passageway. A cutter is disposed along a first surface of the valve element and a seal system is positioned for engagement with a second surface of the valve element to provide separate cutting and sealing surfaces. Actuating the valve element from the open position to the closed position enables cutting of a conveyance, that may be positioned through the passageway, while simultaneously forming a seal along a separate surface to sealingly block the passageway.
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1. A system for use in a subsea test tree, comprising: a subsea test tree housing having a passageway sized to receive a conveyance therethrough; anda valve mounted along the passageway, the valve having: a valve element pivotably mounted in the subsea test tree for movement between an open position
1. A system for use in a subsea test tree, comprising: a subsea test tree housing having a passageway sized to receive a conveyance therethrough; anda valve mounted along the passageway, the valve having: a valve element pivotably mounted in the subsea test tree for movement between an open position in which the conveyance can pass through the passageway and a closed position;a seal retainer positioning a seal to seal against a first radial surface of the valve element when the valve element is in the closed position; anda cutter positioned along a second radial surface of the valve element that is radially-offset from the first radial surface such that pivoting of the valve element to the closed position causes the cutter to cut through the conveyance if positioned in the passageway. 2. The system as recited in claim 1, wherein the cutter comprises a cutting edge formed on the valve element. 3. The system as recited in claim 1, wherein the first radial surface is a partially-spherical, radially outward surface of the valve element. 4. The system as recited in claim 1, wherein the first radial surface is a partially-spherical, radially inward surface of the valve element. 5. The system as recited in claim 1, wherein the valve further comprises a cutting insert located within the valve element to support the conveyance during cutting. 6. The system as recited in claim 5, wherein the cutting insert is generally tubular with an interior size to receive the conveyance, the cutting insert being directly connected to the subsea test housing by a pin having a circular surface about which the valve element pivots during cutting. 7. The system as recited in claim 1, wherein the valve element comprises a relief to receive the conveyance during pivoting of the valve element to the closed position. 8. The system as recited in claim 1, wherein the valve element is a ball valve element rotatably mounted about a cutting insert with the cutter located along an interior of the ball valve element. 9. The system as recited in claim 1, wherein the valve element is a ball valve element rotatably mounted adjacent a cutting insert with the cutter located along an exterior of the ball valve element. 10. The system as recited in claim 1, wherein the valve element is rotated by an articulating actuator arm. 11. The system as recited in claim 5, wherein the cutting insert defines a recess, and wherein a pin extends through the valve element and at least partially into the recess. 12. The system as recited in claim 5, wherein the cutting insert is completely located within the valve element. 13. A method of shutting in a well, comprising: positioning a valve along a flow path through a subsea test tree;providing the valve with a valve member pivotable between open and closed positions with respect to the flow path;locating a cutter along a first radial surface of the valve member to enable cutting of a conveyance positioned in the flow path when the valve member is pivoted from the open position to the closed position; andarranging a seal to seal off the flow path by sealingly engaging the valve member along a second radial surface of the valve member, radially-offset from the first radial surface, when the valve member is pivoted to the closed position. 14. The method as recited in claim 13, wherein providing comprises providing the valve member in the form of a ball valve member. 15. The method as recited in claim 13, wherein providing comprises providing the valve member in the form of a partial ball valve member. 16. The method as recited in claim 13, further comprising cutting a coiled tubing conveyance by pivoting the valve member to the closed position. 17. The method as recited in claim 13, further comprising cutting a wireline conveyance by pivoting the valve member to the closed position. 18. The method as recited in claim 13, wherein locating the cutter along the first radial surface comprises locating a cutter edge along an exterior arcuate surface. 19. The method as recited in claim 13, wherein locating the cutter along the first radial surface comprises locating a cutter edge along an interior arcuate surface. 20. A valve, comprising: a ball valve element rotatably mounted in a housing, the ball valve element having an exterior radial surface, an interior radial surface, and a passageway sized to receive a conveyance therethrough;a cutter; anda seal system, the cutter and the seal system being radially-offset from one another along the exterior radial surface and the interior radial surface in a manner which separates the cutting and sealing functions. 21. The system as recited in claim 20, wherein the cutter is located along the exterior radial surface and the seal system is located along the interior radial surface. 22. The system as recited in claim 20, wherein the cutter is located along the interior radial surface and the seal system is located along the exterior radial surface.
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이 특허에 인용된 특허 (23)
Noack Timothy (Dumas TX) Allred Wesley R. (Dallas TX), Ball valve with coiled tubing cutting ability.
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