Choke plug tip

Patent metadata

Field	Value
Publication number	US-10125875-B2
Application number	US-201615169525-A
Country	US
Kind code	B2
Filing date	May 31, 2016
Priority date	May 31, 2016
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A choke valve includes a choke body, a choke trim disposed in the choke body, where the choke trim is configured to adjust a cross-sectional area of a flow path in the choke body to adjust a fluid flow through the choke valve, a choke plug of the choke trim disposed in the flow path of the fluid flow, a stem of the choke plug that includes a first material, and a tip portion of the choke plug coupled to the stem, where the tip portion includes a superhard material.

First claim

The invention claimed is:

1. A method, comprising:
coupling a tip portion to a stem of a choke plug to form the choke plug, wherein the tip portion comprises a first segment having a first opening, a second segment having a second opening, and a fastener extending through the first and second openings, wherein the first and second segments comprise a diamond based material, and wherein the stem comprises a second material different from the diamond based material;
disposing a shim about the fastener inside the first and second openings of the first and second segments, wherein the shim extends axially across a joint between the first segment and the second segment, wherein the shim is configured to generally align the first segment and the second segment with one another; and
disposing the choke plug in a choke body such that the choke plug is configured to adjust a cross-sectional area of a flow path of a fluid flowing through a choke valve.

2. The method of claim 1 , wherein a first distal end of the first segment axially abuts a second distal end of the second segment.

3. The method of claim 2 , wherein the fastener is configured to move through the first and second openings to secure the first and second segments to the stem.

4. A choke plug for a choke valve, comprising:
a tip portion configured to be disposed in a flow path of the choke valve, wherein the tip portion comprises a first segment having a first opening, a second segment having a second opening, and a fastener extending through the first and second openings, wherein the first and second segments comprise a diamond based material;
a shim disposed about the fastener inside the first and second openings of the first and second segments, wherein the shim extends axially across a joint between the first segment and the second segment, wherein the shim is configured to generally align the first segment and the second segment with one another;
a stem comprising a second material, wherein the stem is coupled to the tip portion such that the stem is positioned upstream of the tip portion relative to the flow path.

5. A choke valve, comprising:
a choke body;
a choke trim disposed in the choke body, wherein the choke trim is configured to adjust a cross-sectional area of a flow path in the choke body to adjust a fluid flow through the choke valve; and
a choke plug of the choke trim disposed in the flow path of the fluid flow, wherein the choke plug comprises:
a stem comprising a first material;
a tip portion coupled to the stem, wherein the tip portion comprises a first segment having a first opening, a second segment having a second opening, and a fastener extending through the first and second openings, wherein the first and second segments comprise a diamond based material; and
a shim disposed about the fastener inside the first and second openings of the first and second segments, wherein the shim extends axially across a joint between the first segment and the second segment, wherein the shim is configured to generally align the first segment and the second segment with one another.

6. The choke valve of claim 5 , comprising a seal disposed axially between the second segment and the stem.

7. The choke valve of claim 5 , wherein the diamond based material comprises polycrystalline diamond.

8. The choke valve of claim 5 , wherein the first material comprises tungsten carbide.

9. The choke valve of claim 5 , wherein the first material comprises a nickel alloy.

10. The choke valve of claim 5 , wherein a first distal end of the first segment axially abuts a second distal end of the second segment, the first segment comprises a recess, and a head portion of the fastener is disposed in the recess to secure the first and second segments to the stem.

11. The choke valve of claim 5 , comprising a brazed joint directly connecting the first segment and the second segment.

12. The choke valve of claim 5 , wherein the joint between the first segment and the second segment comprises a stair-stepped interface.

13. The choke valve of claim 5 , comprising one or more bearing features disposed within the tip portion, wherein the one or more bearing features are configured to reduce stress on the joint between the first segment and the second segment.

14. The choke valve of claim 5 , comprising an alignment sleeve disposed within the tip portion, wherein the alignment sleeve extends across at least a portion of both the first segment and the second segment, and wherein the alignment sleeve is configured to generally align the first segment and the second segment with one another.

15. The choke valve of claim 5 , wherein the fastener is configured to move through the first and second openings to secure the first and second segments to the stem.

16. The choke valve of claim 5 , wherein the shim comprises a third opening, and the fastener is configured to move through the first, second, and third openings to secure the first and second segments to the stem.

17. The choke valve of claim 5 , wherein the stem extends at least partially about the second segment.

18. The choke valve of claim 5 , comprising an annular seat, wherein the tip portion of the choke plug is configured to abut the annular seat.

Assignees

• Cameron Int Corp

Inventors

• Evans Finbarr
• Mchugh Edmund Peter
• Quin David Francis Anthony

Classifications

• F16K25/005

  Particular materials for seats or closure elements · CPC title

• F16K3/246 Primary

  Combination of a sliding valve and a lift valve · CPC title

• F16K25/04

  Arrangements for preventing erosion, not otherwise provided for · CPC title

• F16K5/10 Primary

  Means for additional adjustment of the rate of flow · CPC title

• B23P15/001

  valves or valve housings (welding B23K; valve housings per se F16K) · CPC title