Boronized corrosion resistant alloy component for high pressure and high temperature oilfield applications

Patent metadata

Field	Value
Publication number	US-12467123-B2
Application number	US-202318483013-A
Country	US
Kind code	B2
Filing date	Oct 9, 2023
Priority date	Oct 9, 2023
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A hardened slip and a method of making the hardened slip are disclosed. A method of hard surfacing a slip component for a downhole tool is disclosed. The slip component may have a bearing surface and may be composed of a base material, the base material being metallic. The method may comprise steps of positioning at least the bearing surface of the slip component with a direct contact with a boron source; bonding an external layer at least on the bearing surface to form a metallurgical bond between boron from the boron source with the base material by boriding the base material; and maintaining a bulk temperature of the slip component below a melting point of the base material.

First claim

We claim:

1 . A method of hard surfacing a slip component for a downhole tool, the slip component having a bearing surface and being composed of a base material, the base material being metallic, the method comprising:
positioning at least the bearing surface of the slip component with a direct contact with a boron source having 10% B 4 C, 10% KBF and 80% SiC, wherein the boron source maintains in a non-molten state; bonding an external layer at least on the bearing surface to form a metallurgical bond between boron from the boron source with the base material by boriding the base material; and maintaining a bulk temperature of the slip component below a melting point of the base material.

2 . The method of claim 1 , wherein maintaining the bulk temperature of the slip component below the melting point comprises maintaining the bulk temperature of the slip component below a temperature where a design strength level of the slip component is compromised.

3 . The method of claim 1 , wherein the base material of the slip component comprises nickel super alloys.

4 . The method of claim 3 , wherein the nickel super alloy comprises UNS N07718.

5 . The method of claim 1 , further comprising increasing a hardness of at least a portion of the external layer by surface treating the external layer to induce compressive stresses or relieve tensile stresses.

6 . The method of claim 1 , further comprising increasing a corrosive resistance of at least a portion of the external layer by surface treating the external layer.

7 . The method of claim 5 , wherein surface treating the external layer comprises:
using a mechanical process selected from the group consisting of peening, shot peening, and burnishing; or using a non-mechanical process selected from the group consisting of ultrasonic peening and laser peening.

8 . The method of claim 1 , wherein the slip component comprise at least one slip of a slip mechanism of the downhole tool, and wherein the bearing surface comprises a gripping surface of the at least one slip.

9 . A slip component for a downhole tool, the slip component being composed of a base material and having a bearing surface, the base material being metallic, at least the bearing surface treated by: positioning at least the bearing surface of the slip component with a direct contact with a boron source having 10% B 4 C, 10% KBF and 80% SiC, wherein the boron source maintains in a non-molten state; and
bonding an external layer at least on the bearing surface to form a metallurgical bond between boron from the boron source with the base material by boriding the base material and maintaining a bulk temperature of the slip component below a melting point of the base material.

10 . The slip component of claim 9 , wherein maintaining the bulk temperature of the slip component below the melting point comprises maintaining the bulk temperature of the slip component below a temperature where a design strength level of the slip component is compromised.

11 . The slip component of claim 9 , wherein the base material of the slip component comprises nickel super alloys.

12 . The slip component of claim 11 , wherein the nickel super alloy comprises UNS N07718.

13 . The slip component of claim 9 , wherein the at least the bearing surface treated further comprising increasing a hardness of at least a portion of the external layer by surface treating the external layer to induce compressive stresses or relieve tensile stresses.

14 . The slip component of claim 9 , wherein the slip component comprises at least one slip of a slip mechanism of the downhole tool having a gripping surface as the bearing surface.

15 . The slip component of claim 9 , wherein the slip component is selected from the group consisting of a slip, a cone, and a cage of a slip mechanism of the downhole tool.

16 . A method of hard surfacing a slip component for a downhole tool, the slip component having a bearing surface and being composed of a base material, the base material being metallic, the method comprising:
positioning at least the bearing surface of the slip component with a direct contact to a boron source having 10% B 4 C, 10% KBF and 80% SiC, wherein the boron source maintains in a non-molten state; bonding an external layer at least on the bearing surface by boriding the base material; and increasing a hardness of at least a portion of the external layer by surface treating the external layer to induce compressive stresses or relieve tensile stresses.

17 . The method of claim 16 , wherein surface treating the external layer comprises:
using a mechanical process selected from the group consisting of peening, shot peening, and burnishing; or using a non-mechanical process selected from the group consisting of ultrasonic peening and laser peening.

18 . The method of claim 16 further comprising the step of increasing a corrosive resistance of at least a portion of the external layer by surface treatment.

19 . The method of claim 16 further comprising the step of maintaining a bulk temperature of the slip component below a melting point of the base material.

20 . The method of claim 16 , wherein maintaining the bulk temperature of the slip component below the melting point comprises maintaining the bulk temperature of the slip component below a temperature where a design strength level of the slip component is compromised.

Assignees

• Cnpc Usa Corp
• Beijing Huamei Inc
• China Nat Petroleum Corp
• Kembl Petroleum Tech Development Co Ltd

Inventors

• Dunne Timothy Ryan
• Zhao Lei
• Ren Jiaxiang (Jason)
• Cheng Peng

Classifications

• C22C30/00

  Alloys containing less than 50% by weight of each constituent · CPC title

• E21B23/01 Primary

  for anchoring the tools or the like (E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18) · CPC title

• E21B33/129

  with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence) · CPC title

• C22C19/058

  without Mo and W · CPC title

• C23C8/70 Primary

  of ferrous surfaces · CPC title