Valve body for frac pump

Patent metadata

Field	Value
Publication number	US-11085544-B2
Application number	US-201816026236-A
Country	US
Kind code	B2
Filing date	Jul 3, 2018
Priority date	Jul 10, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

Frac pumps have valve bodies. The valve bodies comprise a head and a compressible seal. The head provides a valve surface adapted to engage the valve seat. The compressible seal is carried on the head radially inward of the valve surface and is adapted to engage the valve seat. It is mounted between the head and a valve guide having a plurality of legs. The face of the compressible seal has a slightly curved, convex sealing surface.

First claim

What is claimed is:

1. A valve body for a frac pump, said valve body comprising:
(a) a head providing a valve surface having a face adapted to engage a first mating portion of a valve seat in said frac pump; and
(b) a compressible seal carried on said head and having a face adapted to engage a second mating portion of said valve seat;
(c) wherein said compressible seal is situated radially inward of said valve surface;
(d) wherein said valve surface face has a first angle and said compressible seal face has a second angle, said first angle being steeper than said second angle; and
(e) wherein said compressible seal face is a slightly curved, convex surface at its radially outer sealing surface.

2. The valve body of claim 1 , wherein said compressible seal is fabricated separately from said head.

3. The valve body of claim 2 ; wherein said compressible seal is fabricated from an elastomer.

4. The valve body of claim 1 , wherein said compressible seal is fabricated from an elastomer.

5. The valve body of claim 1 , wherein the face of said compressible seal extends at an angle shallower than that of the second mating portion of said valve seat.

6. The valve body of claim 5 , wherein said compressible seal is fabricated from an elastomer separately from said head and said valve body comprises legs attached to said head.

7. The valve body of claim 6 , wherein said head and said legs are attached by a threaded connection.

8. The valve body of claim 5 , wherein said compressible seal is fabricated from an elastomer separately from said head and said head comprises a downwardly extending post and said compressible seal has an opening therein adapted to allow said compressible seal to be carried on said head around said post.

9. The valve body of claim 8 , wherein said valve body comprises legs attached by a threaded connection to said post.

10. The valve body of claim 1 , wherein said valve body comprises legs attached to said head.

11. The valve body of claim 10 , wherein said head and said legs are attached by a threaded connection.

12. The valve body of claim 1 , wherein said head comprises a downwardly extending post and said compressible seal has an opening therein adapted to allow said compressible seal to be carried on said head around said post.

13. The valve body of claim 12 , wherein said valve body comprises legs attached by a threaded connection to said post.

14. A valve assembly for the frac pump comprising the valve seat and the valve body of claim 1 .

15. A fluid end for the frac pump comprising the valve body of claim 1 .

16. The frac pump comprising the fluid end of claim 15 .

17. The valve body of claim 1 , wherein said valve body comprises:
(a) a valve guide attached to said head, said valve guide comprising a base and a plurality of legs depending from said guide base; and
(h) wherein said compressible seal is an annular seal having a central opening; an upper surface, and a lower surface; and
(c) wherein said compressible seal is mounted between a lower surface of said head and an upper surface of said guide base, said head lower surface being substantially co-extensive with said upper surface of said seal and said guide base upper surface being substantially co-extensive with said lower surface of said seal.

18. A valve assembly for the frac pump comprising the valve seat and the valve body of claim 17 .

19. A fluid end for the frac pump comprising the valve body of claim 17 .

20. The frac pump comprising the fluid end of claim 19 .

21. A valve body for a frac pump, said valve body comprising:
(a) a head providing a valve surface adapted to engage a mating first portion of a valve seat in said frac pump;
(b) a valve guide attached to said head, said valve guide comprising a base and a plurality of legs depending from said guide base; and
(c) an annular compressible seal having a central opening; an upper surface, a lower surface, and a face adapted to engage a mating second portion of said valve seat;
(d) wherein said compressible seal is mounted between a lower surface of said head and an upper surface of said guide base; said head lower surface being substantially co-extensive with said upper surface of said seal and said guide base upper surface being substantially co-extensive with said lower surface of said seal.

22. A valve assembly for the frac pump comprising the valve seat and the valve body of claim 21 .

23. A fluid end for the frac pump comprising the valve body of claim 21 .

24. The frac pump comprising the fluid end of claim 23 .

Assignees

• Bj Energy Solutions Llc

Inventors

• Yeung Tony

Classifications

• E21B43/2607

  Surface equipment specially adapted for fracturing operations · CPC title

• F16K1/36

  Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) · CPC title

• F04B53/10

  Valves; Arrangement of valves · CPC title

• F04B19/22

  of reciprocating-piston type · CPC title

• F04B53/16

  Casings; Cylinders; Cylinder liners or heads; Fluid connections · CPC title