The invention provides a valve useful as a production valve in or connected to a production tree subsea, and other similar uses subsea or topside, the valve comprises a valve element, a valve element pressure housing, an actuator, a stem and a bonnet, the actuator is via the stem operatively arrange
The invention provides a valve useful as a production valve in or connected to a production tree subsea, and other similar uses subsea or topside, the valve comprises a valve element, a valve element pressure housing, an actuator, a stem and a bonnet, the actuator is via the stem operatively arranged to close or open a fluid passageway through the valve element, the bonnet enclose the stem and is connected to the valve element pressure housing and seals are arranged between the stem and the bonnet for sealing against the pressure of the valve element pressure housing. The valve is distinctive in that the valve comprises at least one seal for sealing between stem and bonnet, the seal having identical inner sealing diameter against the stem and outer sealing against a single body or element of the bonnet.
대표청구항▼
1. A valve useful as a production valve in or connected to a production tree subsea, and other similar uses subsea or topside, the valve comprising: a valve element;a valve element pressure housing;an actuator;a stem; anda bonnet;at least one seal for sealing between stem and bonnet, the seal having
1. A valve useful as a production valve in or connected to a production tree subsea, and other similar uses subsea or topside, the valve comprising: a valve element;a valve element pressure housing;an actuator;a stem; anda bonnet;at least one seal for sealing between stem and bonnet, the seal having a uniform inner sealing diameter against the stem and a uniform outer sealing against the bonnet;wherein the actuator via the stem is operatively arranged to close or open a fluid passageway through the valve element;wherein the bonnet encloses the stem and is connected to the valve element pressure housing and the at least one seal is arranged between the stem and the bonnet for sealing against the pressure of the valve element pressure housing;wherein the at least one seal seals on the side away from the pressure housing and in a direction away from the pressure housing and are supported by a support mechanism comprising a support ring followed by a segmented load ring followed by a retainer ring; andwherein the segmented load ring in cross section has a wedge-like shape, a widest part of the wedge is at an upper radial outer surface, so that axial forces acting on the segmented load ring will provide a force component pressing the segmented load ring toward the bonnet or bonnet element and a protrusion of the segmented load ring will be pressed into a groove of the bonnet or bonnet element. 2. The valve according to claim 1, wherein the at least one seal for sealing the stem to the bonnet is of the uniform inner seal diameter and the uniform outer seal diameter, and an environmental seal arranged between the valve stem and the single body or single element of the bonnet; or primary seals, secondary seals and environmental seals arranged between the valve stem and the single body or single element of the bonnet. 3. The valve according to claim 1, wherein the support ring on an axial surface away from the pressure housing is inclined outward, a facing axial surface of the segmented load ring is correspondingly inclined inward, the segmented load ring on the axial face toward the pressure housing comprises an axial surface that is inclined inward and the facing axial surface of the retainer ring comprises an axial surface that correspondingly is inclined outward. 4. The valve according to claim 1, wherein the retainer ring in cross section comprises an L-shape, a bottom part of the L lay toward the stem and partly under the segmented load ring, a part of the L under the segmented load ring fits into an adapted step-out or cut-out of the segmented load ring. 5. The valve according to claim 1, wherein the segmented load ring comprises three segments. 6. The valve according to claim 1, wherein the segmented load ring comprises a protrusion around the radial outer surface, the protrusion fits into an adapted groove around the inner surface of the bonnet or bonnet element, the groove is deeper than the height of the protrusion. 7. The valve according to claim 6, wherein the groove comprises axial side surfaces and the protrusion comprises axial side surfaces, the axial side surfaces of the groove and the axial side surfaces of the protrusion providing axial support.
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이 특허에 인용된 특허 (11)
Ungchusri Tep (The Woodlands TX) Jakubowski William J. (Houston TX), Fluid packing assembly with alternating diverse seal ring elements.
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