IP Library › Granted Patent US 12,378,371
Granted Patent B2
US 12,378,371 · App. 17/111,472 · Granted Aug 5, 2025

Stator compound having an azide cured elastomeric base and stators and downhole motors using the same

Inventors: Stefan Butuc (Houston, TX); Steve Kyker (Houston, TX); Victoria Perez (Houston, TX); Mike Salerno (Houston, TX)
Assignee: PV Fluid Products, Inc.
C08J3/22C08K3/04C08K5/0016F01C21/104C08J2400/26
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Quick Facts
Patent No.
US 12,378,371
App. No.
17/111,472
Granted
Aug 5, 2025
Kind
B2
Abstract

A rubber compound including an azide cured elastomeric base, wherein the rubber compound is used to form an elastomeric component of a downhole tool. The rubber compound is comprised of at least one elastomeric component and at least one diazide curing agent.

Claims (49)

1. A stator compound for a progressive cavity pump or progressive cavity motor stator comprising:

at least one elastomeric component that has been cured with a first curing agent that is a diazide, wherein the at least one elastomeric component is selected from the group consisting of HNBR, NBR, FKM, CR, EPDM, ECO and combinations thereof, and wherein the first curing agent is 1,3 benzene disulfonyl azide (1,3 BDSA);

at least one reinforcing filler; and

a triphenyl phosphate plasticizer.

2. The stator compound of claim 1 in which the first curing agent has a concentration of about 0.05 phr to about 10 phr.

3. The stator compound of claim 1 in which the first curing agent has a concentration of about 0.2 phr to about 4.5 phr.

4. The stator compound of claim 1 in which one of the at least one reinforcing filler is selected from a group consisting of carbon black, silica, and clay.

5. The stator compound of claim 4 in which the at least one reinforcing filler is carbon black.

6. The stator compound of claim 5 in which the concentration of the carbon black is about 10 phr to about 100 phr.

7. The stator compound of claim 1 further comprising a second curing agent.

8. The stator compound of claim 7 in which the second curing agent is selected from a group consisting of a diazide that is different from the first curing agent, a sulfur-based curing agent, and a peroxide-based curing agent.

9. The stator compound of claim 1 further comprising an accelerator.

10. The stator compound of claim 1 further comprising an activator.

11. A stator compound for a progressive cavity pump or progressive cavity motor stator comprising:

at least one elastomeric component that has been cured with a first curing agent that is a diazide, wherein the at least one elastomeric component is selected from the group consisting of HNBR, NBR, FKM, CR, EPDM, ECO and combinations thereof;

at least one reinforcing filler;

a second curing agent; and

a triphenyl phosphate plasticizer.

12. The stator compound of claim 11 in which the first curing agent has a formula of N 3 -A-R—B-N 3 , wherein:

A is a substituted methylene group, an unsubstituted methylene group, a substituted benzyl group, an unsubstituted benzyl group, a substituted benzylidene group, or a unsubstituted benzylidene group; and

B is a substituted methylene group, an unsubstituted methylene group, a substituted benzyl group, an unsubstituted benzyl group, a substituted benzylidene group, or a unsubstituted benzylidene group;

R is a linear, branched, or cyclic alkylene group of 1 to 20 carbon atoms, optionally comprising one or more heteroatoms.

13. The stator compound of claim 12 in which the first curing agent has a concentration of about 0.05 phr to about 10 phr.

14. The stator compound of claim 12 in which the first curing agent has a concentration of about 0.2 phr to about 4.5 phr.

15. The stator compound of claim 11 in which one of the at least one reinforcing filler is selected from a group consisting of carbon black, silica, and clay.

16. The stator compound of claim 15 in which the at least one reinforcing filler is carbon black.

17. The stator compound of claim 16 in which the concentration of the carbon black is about 10 phr to about 100 phr.

18. The stator compound of claim 11 in which the first curing agent is selected from a group consisting of 1,3 benzene disulfonyl azide (1,3 BDSA), 1,12-diazidododecane, 1,16-diazidohexadecane, and 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone.

19. The stator compound of claim 11 in which the second curing agent is selected from a group consisting of a diazide that is different from the first curing agent, a sulfur-based curing agent, and a peroxide-based curing agent.

20. The stator compound of claim 11 further comprising an accelerator.

21. The stator compound of claim 11 further comprising an activator.

22. A stator compound for a progressive cavity pump or progressive cavity motor stator comprising:

at least one elastomeric component that has been cured with a first curing agent that is a diazide, wherein the at least one elastomeric component is selected from the group consisting of HNBR, NBR, FKM, CR, EPDM, ECO and combinations thereof;

at least one reinforcing filler; and

a triphenyl phosphate plasticizer.

23. The stator compound of claim 22 in which the first curing agent has a formula of N 3 -A-R—B-N 3 , wherein:

A is a substituted methylene group, an unsubstituted methylene group, a substituted benzyl group, an unsubstituted benzyl group, a substituted benzylidene group, or a unsubstituted benzylidene group; and

B is a substituted methylene group, an unsubstituted methylene group, a substituted benzyl group, an unsubstituted benzyl group, a substituted benzylidene group, or a unsubstituted benzylidene group;

R is a linear, branched, or cyclic alkylene group of 1 to 20 carbon atoms, optionally comprising one or more heteroatoms.

24. The stator compound of claim 23 in which the first curing agent has a concentration of about 0.05 phr to about 10 phr.

25. The stator compound of claim 23 in which the first curing agent has a concentration of about 0.2 phr to about 4.5 phr.

26. The stator compound of claim 22 in which one of the at least one reinforcing filler is selected from a group consisting of carbon black, silica, and clay.

27. The stator compound of claim 26 in which the at least one reinforcing filler is carbon black.

28. The stator compound of claim 27 in which the concentration of the carbon black is about 10 phr to about 100 phr.

29. The stator compound of claim 22 in which the first curing agent is selected from a group consisting of 1,3 benzene disulfonyl azide (1,3 BDSA), 1,12-diazidododecane, 1,16-diazidohexadecane, and 2,6-bis(4-azidobenzylidene)-4-methylcyclohexanone.

30. The stator compound of claim 22 further comprising a second curing agent.

31. The stator compound of claim 30 in which the second curing agent is selected from a group consisting of a diazide that is different from the first curing agent, a sulfur-based curing agent, and a peroxide-based curing agent.

32. The stator compound of claim 22 further comprising an accelerator.

33. The stator compound of claim 22 further comprising an activator.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 16, 2025
From: BUTUC, STEFAN; KYKER, GARY STEPHEN; PEREZ, CARMEN VICTORIA; SALERNO, MICHAEL
To: PV FLUID PRODUCTS, INC.
Reel/Frame 071140/0088 →
Continuity (2)
Provisional Application 62943795 · Dec 4, 2019
Related Publication 20210171724A1 · Jun 10, 2021
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