Wellsite hardfacing with distributed hard phase and method of using same

Patent metadata

Field	Value
Publication number	US-9909395-B2
Application number	US-201514860506-A
Country	US
Kind code	B2
Filing date	Sep 21, 2015
Priority date	Sep 21, 2015
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A hardfacing disposable on a surface of a component, such as a wellsite component, is disclosed. The hardfacing comprises a surface portion and a bottom portion with a segregation line defined therebetween. The surface portion and the bottom portion each include a matrix phase including a matrix composition made of a metal alloy and a hard phase distributed in the matrix phase. The hard phase may include an abrasion-resistant composition made of a hard material (e.g., vanadium carbide). The surface portion has a first concentration of the abrasion-resistant composition and the bottom portion has a second concentration of the abrasion-resistant composition with the first concentration being greater than the second concentration such that a wear resistant surface is defined on the surface of the component.

First claim

What is claimed is:

1. A hardfacing disposable on a surface of a component, comprising:
a surface portion and a bottom portion with a segregation line defined therebetween, the surface portion and the bottom portion each comprising:
a matrix phase comprising a matrix composition comprising a metal alloy; and
a hard phase distributed in the matrix phase, the hard phase comprising an abrasion-resistant composition comprising a hard material;

wherein the surface portion has a first concentration of the abrasion-resistant composition and the bottom portion has a second concentration of the abrasion-resistant composition with the first concentration being greater than the second concentration whereby a wear resistant surface is defined on the surface of the component;
wherein the hard material comprises a plurality of particles having a particle size distribution D(90) of 60 to 200 μm.

2. The hardfacing of claim 1 , wherein the segregation line is a line extending from a point half a vertical thickness of the hardfacing at a first location to another point half the vertical thickness of the hardfacing at a second location.

3. The hardfacing of claim 1 , wherein the hardfacing comprises about 5 to about 25 wt % of the abrasion-resistant composition.

4. The hardfacing of claim 1 , wherein the hardfacing comprises about 75 to about 95 wt % of the matrix composition.

5. The hardfacing of claim 1 , wherein the first concentration comprises ≧about 60 wt % of the abrasion-resistant composition and the second concentration comprises ≦about 40 wt % of the abrasion-resistant composition.

6. The hardfacing of claim 1 , wherein the abrasion-resistant composition comprises particles having a particle size of about 40 to about 250 μm.

7. The hardfacing of claim 1 , wherein the matrix composition comprises at least 50 wt % iron.

8. The hardfacing of claim 1 , wherein the matrix composition comprises at least 50 wt % cobalt.

9. The hardfacing of claim 1 , wherein the matrix composition comprises stainless steel.

10. The hardfacing of claim 1 , wherein the abrasion-resistant composition comprises vanadium carbide.

11. The hardfacing of claim 1 , wherein the abrasion-resistant composition comprises titanium carbide.

12. The hardfacing of claim 1 , wherein the abrasion-resistant composition comprises titanium boride.

13. The hardfacing of claim 1 , wherein the abrasion-resistant composition has a Vickers Hardness ≧about 2000 HV.

14. The hardfacing of claim 1 , wherein the abrasion-resistant composition has a density ≦about 15.0 g/cm 3 .

15. The hardfacing of claim 1 , wherein the abrasion-resistant composition has a coefficient of thermal expansion of about 5×10 −6 m/m/K to about 15×10 −6 m/m/K.

16. The hardfacing of claim 1 , wherein the component comprises a wellsite component and wherein the surface is steel.

17. A hardfacing disposable on a surface of a wellsite component, the surface comprising a metal alloy, the wellsite component positionable at a wellsite about a wellbore, the hardfacing comprising:
a matrix phase comprising a matrix composition comprising a metal alloy; and
a hard phase comprising an abrasion-resistant composition comprising a plurality of vanadium carbide particles distributed about the matrix phase whereby a wear resistant surface is defined on the surface of the wellsite component;
wherein the plurality of vanadium carbide particles have a particle size distribution D(90) of 60 to 200 μm.

18. The hardfacing of claim 17 , wherein the abrasion-resistant composition comprises ≧about 10 wt % vanadium carbide.

19. The hardfacing of claim 17 , wherein the matrix composition comprises at least 50 wt % iron.

20. The hardfacing of claim 17 , wherein the matrix composition comprises at least 50 wt % cobalt.

21. The hardfacing of claim 17 , wherein the matrix composition comprises stainless steel.

22. The hardfacing of claim 17 , wherein the hardfacing comprises a bottom portion positionable adjacent the surface of the wellsite component and a surface portion on the bottom portion, the surface portion comprising ≧about 60 wt % of the abrasion-resistant composition and the bottom portion comprising ≦about 40 wt % of the abrasion-resistant composition.

23. The hardfacing of claim 17 , wherein the abrasion-resistant composition comprises particles having a particle size of about 40 to about 250 μm.

24. The hardfacing of claim 17 , wherein the abrasion-resistant composition has a Vickers Hardness ≧about 2000 HV.

25. The hardfacing of claim 17 , wherein the abrasion-resistant composition has a density ≦about 15.0 g/cm 3 .

26. The hardfacing of claim 17 , wherein the abrasion-resistant composition has a coefficient of thermal expansion of about 5×10 −6 m/m/K to about 15×10 −6 m/m/K.

Assignees

• Nat Oilwell Dht Lp

Inventors

• Wang Ying
• Sue Jiinjen Albert

Classifications

• E21B10/00 Primary

  Drill bits (specially adapted for deflecting the direction of boring {E21B7/064}; with means for collecting substances E21B27/00) · CPC title

• B23K2103/16

  Composite materials · CPC title

• B23K2103/05

  Stainless steel · CPC title

• C22C38/04

  containing manganese · CPC title

• C23C24/103

  Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides · CPC title