Valve seat, plug valve, and fracturing manifold

Patent metadata

Field	Value
Publication number	US-12287046-B2
Application number	US-202217794993-A
Country	US
Kind code	B2
Filing date	Feb 9, 2022
Priority date	Jul 29, 2021
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

A valve seat, a plug valve, and a fracturing manifold are provided. The valve seat includes a sealing valve seat in an annular shape and a mounting valve seat in an annular shape. The sealing valve seat includes a sealing valve seat inner hole, and the mounting valve seat includes a mounting valve seat inner hole. The sealing valve seat is nested inside the mounting valve seat, and the sealing valve seat inner hole communicates with the mounting valve seat inner hole. In axial and radial directions of the sealing valve seat inner hole, or axial and radial directions of the mounting valve seat inner hole, an outer surface of the sealing valve seat abuts against an inner surface of the mounting valve seat.

First claim

What is claimed is:

1. A valve seat, comprising:
a sealing valve seat in an annular shape, the sealing valve seat including a sealing valve seat inner hole, the sealing valve seat having one end in a cylindrical shape and another end in a curved shape; and
a mounting valve seat in an annular shape, the mounting valve seat including a mounting valve seat inner hole, wherein
the one end of the sealing valve seat in the cylindrical shape is nested inside the mounting valve seat, the another end of the sealing valve seat in the curved shape is nested outside the mounting valve seat, and the sealing valve seat inner hole communicates with the mounting valve seat inner hole;
in longitudinal and radial directions of the sealing valve seat inner hole, or longitudinal and radial directions of the mounting valve seat inner hole, an outer surface of the sealing valve seat abuts against an inner surface of the mounting valve seat,
wherein the sealing valve seat includes a first sealing surface and a second sealing surface; the first sealing surface and the second sealing surface are located at an end of the sealing valve seat proximate to the mounting valve seat; the first sealing surface is parallel to the radial direction of the sealing valve seat inner hole, the second sealing surface is parallel to the longitudinal direction of the sealing valve seat inner hole, and the first sealing surface and the second sealing surface are connected;
the mounting valve seat includes a first mounting surface and a second mounting surface; the first mounting surface and the second mounting surface are located at an end of the mounting valve seat proximate to the sealing valve seat; the first mounting surface is parallel to the radial direction of the mounting valve seat inner hole, the second mounting surface is parallel to the longitudinal direction of the mounting valve seat inner hole, and the first mounting surface and the second mounting surface are connected;
the first sealing surface abuts against the first mounting surface, and the second sealing surface abuts against the second mounting surface;
a surface of the sealing valve seat at the another end of the sealing valve seat arranged opposite the first sealing surface is a curved surface;
the valve seat further comprises an elastic structure;
the sealing valve seat further includes a third sealing surface; the third sealing surface is located at the end of the sealing valve seat proximate to the mounting valve seat, and the third sealing surface is parallel to the first sealing surface and includes a first elastic groove;
the mounting valve seat further includes a third mounting surface; the third mounting surface is located at the end of the mounting valve seat proximate to the sealing valve seat, and the third mounting surface is parallel to the first mounting surface and includes a second elastic groove; and
the elastic structure is disposed in a groove formed by splicing the first elastic groove and the second elastic groove together, and the elastic structure abuts against the sealing valve seat and the mounting valve seat.

2. The valve seat according to claim 1 , further comprising a first sealing ring and a first sealing groove;
the first sealing groove is located in the first sealing surface and/or the first mounting surface; the first sealing ring is disposed in the first sealing groove, and the first sealing ring seals the first mounting surface and the first sealing surface.

3. The valve seat according to claim 1 , further comprising a second sealing ring and a second sealing groove;
the second sealing groove is located in the second sealing surface and/or the second mounting surface; the second sealing ring is disposed in the second sealing groove, and the second sealing ring seals the second mounting surface and the second sealing surface.

4. The valve seat according to claim 1 , wherein the mounting valve seat includes a fourth mounting surface and a fifth mounting surface; the fourth mounting surface and the fifth mounting surface are located at an end of the mounting valve seat away from the sealing valve seat; the fourth mounting surface is parallel to the radial direction of the mounting valve seat inner hole, the fifth mounting surface is parallel to the longitudinal direction of the mounting valve seat inner hole, and the fourth mounting surface and the fifth mounting surface are connected to form a stepped shape.

5. The valve seat according to claim 4 , further comprising a third sealing ring and a fourth sealing ring;
the fourth mounting surface includes a third sealing groove and a fourth sealing groove arranged to be concentric rings; the third sealing ring is disposed in the third sealing groove, and the fourth sealing ring is disposed in the fourth sealing groove.

6. The valve seat according to claim 4 , wherein the valve seat further comprises an expansion band in an annular shape; the fifth mounting surface includes an expansion groove in an annular shape, and the expansion band is disposed in the expansion groove.

7. The valve seat according to claim 1 , wherein the elastic structure includes at least one elastic sheet in an annular shape, and a plate surface of the elastic sheet is wavy.

8. The valve seat according to claim 7 , wherein the elastic structure includes a plurality of elastic sheets; plate surfaces of all the elastic sheets are in a same wavy shape, and the plurality of elastic sheets are stacked.

9. The valve seat according to claim 8 , wherein the plurality of elastic sheets are independent of each other; or, the plurality of elastic sheets are connected to form a helical structure.

10. The valve seat according to claim 1 , wherein the sealing valve seat and the mounting valve seat are integrally formed into a valve seat body in an annular shape;
the valve seat body includes an inner hole, and the sealing valve seat inner hole and the mounting valve seat inner hole are integrally formed into the inner hole.

11. The valve seat according to claim 10 , wherein the valve seat body includes a first valve seat surface and a second valve seat surface; the first valve seat surface is parallel to a radial direction of the inner hole, and the second valve seat surface is parallel to a longitudinal direction of the inner hole; and
the first valve seat surface and the second valve seat surface are connected to form a stepped shape.

12. The valve seat according to claim 11 , wherein a surface of the valve seat body arranged opposite the first valve seat surface is a curved surface.

13. A plug valve, comprising:
a valve body, the valve body including a valve cavity and a flow path communicating with the valve cavity;
a valve core, the valve core being disposed in the valve cavity and including a valve core hole penetrating the valve core; and
two valve seats according to claim 1 , the two valve seats being disposed on both sides of the valve core and opposite each other, and two sealing valve seat inner holes and two mounting valve seat inner holes communicating with the flow path, wherein
a surface of each sealing valve seat away from the mounting valve seat is fitted to a periphery of the valve core hole of the valve core, and a surface of each mounting valve seat away from the sealing valve seat abuts against an inner surface of the valve cavity.

14. The plug valve according to claim 13 , wherein
the sealing valve seat and the mounting valve seat are integrally formed into a valve seat body in an annular shape; the valve seat body includes an inner hole, and the sealing valve seat inner hole and the mounting valve seat inner hole are integrally form

Assignees

• Yantai Jereh Petroleum Equipment & Technologies Co Ltd

Inventors

• Huang Jinling
• Zuo Changxiao
• Zhang Shulin
• Wang Jixin
• Ge Anpeng
• Zhu Yilong

Classifications

• F16K5/201 Primary

  with the housing or parts of the housing mechanically pressing the seal against the plug · CPC title

• F16K1/46

  Attachment of sealing rings · CPC title

• F16K1/42

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

• F16K5/0471 Primary

  between housing and plug · CPC title

• F16K5/08

  Details · CPC title