Valves for use in wells
First Claim
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1. A valve assembly for use in a well, comprising:
- an outer housing;
an inner housing movable with respect to the outer housing and disposed within the outer housing, the inner housing having a hollow interior, and one of the outer housing and the inner housing having a plurality of radial flow passages; and
a sealing device disposed between the inner housing and the outer housing, the sealing device having a primary seat and a secondary seat, at least one of the primary seat and the secondary seat being formed of a harder material than the other, the harder material having a hardness of at least 1200 knoops.
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Abstract
A valve assembly to control the intake of fluid. The valve assembly has a valve body and a valve choke disposed therein. The valve choke has a choke bore through the interior of the valve choke. The valve choke has a plurality of orifices to the choke bore spaced at intervals along the valve choke. A seal is disposed between the valve body and valve choke. The valve system is operable to position the valve choke so that the seal is positioned between the valve body and the valve choke at the intervals between the plurality of orifices.
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Citations
39 Claims
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1. A valve assembly for use in a well, comprising:
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an outer housing; an inner housing movable with respect to the outer housing and disposed within the outer housing, the inner housing having a hollow interior, and one of the outer housing and the inner housing having a plurality of radial flow passages; and a sealing device disposed between the inner housing and the outer housing, the sealing device having a primary seat and a secondary seat, at least one of the primary seat and the secondary seat being formed of a harder material than the other, the harder material having a hardness of at least 1200 knoops. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A valve assembly, comprising:
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an outer housing sized for insertion into a wellbore; an inner housing slidably disposed within the outer housing, the inner housing having a radial flow passage to enable flow of fluid to an interior of the inner housing; and a sealing device disposed between the inner housing and the outer housing to control flow through the radial flow passage, the sealing device being formed of at least two different materials that both form a seal with a choke stop positioned on one of the outer housing and the inner housing, the at least two materials comprising a first material an a second material, the first material being harder than the second material and having a hardness of at least 1200 knoops, the second material being a deformable material. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of controlling fluid flow, comprising:
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constructing a valve assembly with an inner housing slidably disposed within an outer housing; providing a flow passage through the inner housing to enable flow between an exterior and interior of the inner housing; and utilizing a primary seat having a first material hardness of at least 1200 knoops, and a secondary seat having a second material hardness less than the first material hardness, to form a seal between the inner housing and the outer housing when the valve assembly is closed. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification