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US 10,591,068 B2Granted
Ball and seat valve for high temperature and pressure applications
AssigneeHalliburton Energy Services, Inc.
InventorRory Archibald Napier
Life of this patent
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Abstract
A ball and seat valve for high temperature and pressure applications, such as those used in isolation barrier valves in subterranean wells, is disclosed. The valve incorporates thermally fitted sleeve into the ball and/or the seat to allow for greater pressures and temperatures due to resultant stresses left with the parts due to interference. Additionally, the materials making up the sleeves may be chosen to allow for greater resistance to corrosive and erosive wellbore fluids.
Claims10
A valve, comprising:
- a ball having a flow passage formed therein;
- a seat disposed adjacent to and in engagement with the ball;
- a support sleeve formed in the flow passage of the ball;
- and
- a second support sleeve formed in the flow passage of the ball, wherein one support sleeve is disposed at a first end of the flow passage and the other support sleeve is disposed at a second end of the flow passage opposite the first end of the flow passage, wherein the support sleeve and the second support sleeve in the flow passage of the ball are separated in an axial direction by an intermediate portion of the flow passage of the ball that does not have a subsequent support sleeve positioned therein, wherein the support sleeve and the second support sleeve act to pre-stress the ball such that deformation of the ball at a point of contact between the ball and the seat is minimized or prevented when the ball is positioned such that the flow passage of the ball aligns with a hollow interior region of the seat.
2 more elements
Dependencies are inferred from the claim text.