High pressure ball valve and seat
First Claim
Patent Images
1. A method comprising:
- locating a flow control assembly in a fluid flow bore disposed through a valve body, the fluid flow bore having an inlet end and an outlet end, the flow control assembly comprising a flow control element disposed between inlet and outlet valve seats and having an outer surface for sealing contact with an inner annular surfaces of the inlet and outlet valve seats;
rotating the flow control element between open and closed positions;
forming a seal between a sealing face of the inner annular surface of the outlet valve seat and the outer surface of the fluid flow control element;
physically contacting the outer surface of the flow control element with a first plurality of support surfaces located on the inner annular surface adjacent the sealing face of the outlet valve seat;
separating adjacent ones of the first plurality of support surfaces with a like plurality of vent grooves on the inner annular surface of the outlet valve seat between adjacent ones of the first plurality of support surfaces;
separating the first plurality of support surfaces from the sealing face of the outlet seal with an annular vent groove on the inner annular surface of the outlet valve seat between the respective sealing face and the support surfaces; and
applying a pressurized fluid to the inlet end of the fluid flow bore to form a fluid seal between the flow control element, the outlet valve seat and the valve body.
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Accused Products
Abstract
A ball valve for ultra-high pressure applications wherein the inner annular surface(s) of the valve seat(s) has an annular sealing face in sealing engagement with the flow control element, support surfaces adjacent the sealing face in contact with the flow control element, and vent grooves between adjacent support surfaces and between the sealing face and the support surfaces. A method to utilize the bidirectional ball valve involves rotating the valve stem and control element and maintaining a pressure of 275.8 MPa (40,000 psi) or more for at least 1 hour without leaking before opening or after closing the valve.
22 Citations
19 Claims
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1. A method comprising:
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locating a flow control assembly in a fluid flow bore disposed through a valve body, the fluid flow bore having an inlet end and an outlet end, the flow control assembly comprising a flow control element disposed between inlet and outlet valve seats and having an outer surface for sealing contact with an inner annular surfaces of the inlet and outlet valve seats; rotating the flow control element between open and closed positions; forming a seal between a sealing face of the inner annular surface of the outlet valve seat and the outer surface of the fluid flow control element; physically contacting the outer surface of the flow control element with a first plurality of support surfaces located on the inner annular surface adjacent the sealing face of the outlet valve seat; separating adjacent ones of the first plurality of support surfaces with a like plurality of vent grooves on the inner annular surface of the outlet valve seat between adjacent ones of the first plurality of support surfaces; separating the first plurality of support surfaces from the sealing face of the outlet seal with an annular vent groove on the inner annular surface of the outlet valve seat between the respective sealing face and the support surfaces; and applying a pressurized fluid to the inlet end of the fluid flow bore to form a fluid seal between the flow control element, the outlet valve seat and the valve body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A valve comprising:
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a valve body comprising a fluid flow bore disposed therethrough having an inlet end, an outlet end and a flow control assembly located within a portion of the fluid flow bore; the flow control assembly comprising a flow control element disposed between, and having an outer surface in sealing contact with an inner annular surface of an inlet valve seat and an inner annular surface of an outlet valve seat, wherein the flow control element is rotatable between an open and a closed position; a valve stem extending from an outer end through a packing bore disposed radially around the valve stem in the valve body to an inner end of the valve stem, wherein the inner end of the valve stem rotationally engages a recess disposed in the flow control element; an outlet sealing face on a portion of the inner annular surface of the outlet valve seat dimensioned and arranged to sealingly engage a portion of the outer surface of the fluid flow control element; a first plurality of support surfaces adjacent the outlet sealing face dimensioned and arranged in physical contact with the outer surface of the fluid flow control element; and a first plurality of respective vent grooves disposed between adjacent ones of the first plurality of support surfaces, and between the first plurality of support surfaces and the outlet sealing face. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification