Needle tip and seat for a choke valve

Patent metadata

Field	Value
Publication number	US-11549593-B2
Application number	US-202017090878-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Jul 31, 2017
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

Embodiments of the present disclosure relate to a choke valve that 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 needle of the choke trim disposed in the flow path of the fluid flow, where the needle includes a first portion having a superhard material, a seat of the choke trim, where the needle is configured to move along an axis extending through an opening of the seat to adjust the fluid flow through the choke valve.

First claim

The invention claimed is:

1. A system, comprising:
a needle valve, comprising:
a stem;
a first portion having a first bore, wherein the first portion comprises a first superhard material configured to open and close against a valve seat; and
a second portion configured to extend through the first bore and couple the first and second portions to the stem;

wherein an outer surface of the first portion comprises a first tapered annular surface having a first angle relative to a central axis and a cylindrical surface.

2. The system of claim 1 , wherein the first superhard material extends continuously about an outer annular surface of the first portion configured to open and close against an inner annular surface of the valve seat.

3. The system of claim 1 , wherein the first portion is one-piece made of the first superhard material and extending around the first bore.

4. The system of claim 1 , wherein the first superhard material comprises a polycrystalline diamond.

5. The system of claim 1 , comprising a second bore disposed in the second portion.

6. The system of claim 1 , wherein a tapered annular surface extends along both the first and second portions.

7. The system of claim 1 , comprising the valve seat having a second superhard material.

8. The system of claim 7 , wherein the second superhard material extends continuously about an inner annular surface of the valve seat configured to open and close against an outer annular surface of the first portion of the needle valve.

9. The system of claim 7 , wherein the valve seat is one-piece made of the second superhard material and extending about an inner annular surface.

10. The system of claim 7 , wherein an inner surface of the valve seat comprises a first tapered annular surface having a first angle relative to a central axis.

11. The system of claim 7 , wherein the valve seat is disposed in a recess of a body portion having a fluid flow passage.

12. A system, comprising:
a needle valve, comprising:
a stem;
a first portion having a first bore, wherein the first portion comprises a first superhard material configured to open and close against a valve seat; and
a second portion configured to extend through the first bore and couple the first and second portions to the stem;

wherein the valve seat has a second superhard material and is disposed in a recess of a body portion having a fluid flow passage; and
an additional portion disposed in the recess adjacent the valve seat, wherein the additional portion has a hardness lesser than the second superhard material and greater than the body portion.

13. A method, comprising:
providing a needle valve comprising a stem, a first portion, and a second portion, wherein the first portion has a first bore, the first portion comprises a first superhard material configured to open and close against a valve seat, and the second portion is configured to extend through the first bore and couple the first and second portions to the stem wherein an outer surface of the first portion comprises a first tapered annular surface having a first angle relative to a central axis and a cylindrical surface; and
providing the valve seat having a second superhard material.

Assignees

• Cameron Int Corp

Inventors

• Miller Scott A
• Barkatally Ghulam A
• Martino Jerry A
• Elliott Declan
• Mchugh Edmund Peter
• Marshall Jonathan
• Hoyle David
• Cannon Neil

Classifications

• F16K37/005

  for measuring fluid parameters (F16K37/0033 takes precedence) · CPC title

• F16K1/487

  by a fixing element extending in the axial direction of the spindle, e.g. a screw · CPC title

• F16K1/42

  Valve seats (for double-seat valves F16K1/44) · CPC title

• F16K1/385

  contacting in the closed position, over a substantial axial length, a seat surface having the same inclination · CPC title

• F16K1/52

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