High temperature high pressure seal for downhole chemical injection applications

Patent metadata

Field	Value
Publication number	US-2017342802-A1
Application number	US-201615164969-A
Country	US
Kind code	A1
Filing date	May 26, 2016
Priority date	May 26, 2016
Publication date	Nov 30, 2017
Grant date	—

Abstract

An injection system comprises a fluid control member and a reciprocating member; wherein the fluid control member is configured to form a carbon composite-to-metal seal with the reciprocating member in response to application of a compressive force; the carbon composite comprising carbon and a binder containing one or more of the following: SiO 2 ; Si; B; B 2 O 3 ; a filler metal; or an alloy of the filler metal, and the filler metal comprising one or more of the following: aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

First claim

What is claimed is:

1 . An injection system comprising:
a fluid control member; and a reciprocating member; wherein the fluid control member is configured to form a carbon composite-to-metal seal with the reciprocating member in response to application of a compressive force; the carbon composite comprising carbon and a binder containing one or more of the following: SiO 2 ; Si; B; B 2 O 3 ; a filler metal; or an alloy of the filler metal, and the filler metal comprising one or more of the following: aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

2 . The injection system of claim 1 , wherein the system is configured to allow a fluid to flow pass the reciprocating member when the fluid control member is disengaged with the reciprocating member.

3 . The injection system of claim 1 , wherein
the fluid control member comprises a carbon composite portion and a metal portion, and the carbon composite portion forms the carbon composite-to-metal seal with the reciprocating member.

4 . The injection system of claim 3 , wherein a binding layer is present between the carbon composite portion and the metal portion of the fluid control member.

5 . The injection system of claim 3 , wherein the carbon composite portion has a tapered surface.

6 . The injection system of claim 1 , wherein the carbon composite member and the reciprocating member further form a metal-to-metal seal.

7 . The injection system of claim 6 , wherein
the flow control member comprises a carbon composite portion and a metal portion, the carbon composite portion of the flow control member forms a carbon composite-to-metal seal with the reciprocating member, and the metal portion of the flow control member forms a metal-to-metal seal with the reciprocating member.

8 . The injection system of claim 6 , wherein
the flow control member is a metal part, and the reciprocating member comprises a carbon composite portion and a metal portion, the carbon composite portion and the metal portion of the reciprocating member forming a seal with the flow control member.

9 . The injection system of claim 1 , further comprising a biasing member positioned adjacent the flow control member.

10 . The injection system of claim 1 , wherein the carbon composite comprises at least two carbon microstructures; and a binding phase disposed between the at least two carbon microstructures.

11 . The injection system of claim 10 , wherein the binding phase comprises a binder layer and an interface layer bonding one of the at least two carbon microstructures to the binder layer, wherein the interface layer comprises one or more of the following: a C-metal bond; a C—B bond; a C—Si bond; a C—O—Si bond; a C—O-metal bond; or a metal carbon solution.

12 . The injection system of claim 10 , wherein the carbon comprises graphite.

13 . The injection system of claim 10 , wherein the carbon composite further comprises a reinforcing element.

14 . The injection system of claim 13 , wherein the reinforcing element is in the form of a powder, a fiber, a mesh, a filament, a brad, or a mat.

15 . The injection system of claim 13 , wherein the reinforcing element comprises one or more of the following: a metal; a carbide; ceramics; or glass.

16 . A method of injecting a chemical composition, the method comprising
injecting the chemical composition at a pressure sufficient to disengage a flow control member from a reciprocating member so that the chemical composition flows past the reciprocating member; reducing or eliminating the pressure of the chemical composition; engaging the flow control member with the reciprocating member to form a carbon composite-to-metal seal; the carbon composite comprising carbon and a binder containing one or more of the following: SiO 2 ; Si; B; B 2 O 3 ; a filler metal; or an alloy of the filler metal, and the filler metal comprising one or more of the following: aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

17 . The method of claim 16 , wherein engaging the flow control member with the reciprocating member comprises applying a force to the flow control member via a biasing member disposed adjacent the flow control member.

18 . The method of claim 16 , wherein the flow control member comprises a carbon composite portion and a metal portion, and the carbon composite portion forms the carbon composite-to-metal seal with the reciprocating member.

19 . The method of claim 16 , wherein the flow control member and the reciprocating member further form a metal-to-metal seal.

20 . The method of claim 16 , wherein
the fluid control member is a metal part, and the reciprocating member comprises a carbon composite portion and a metal portion, the carbon composite portion and the metal portion of the reciprocating member forming a seal with the fluid control member.

Assignees

• Zhao Lei
• Xu Zhiyue
• Baker Hughes Inc

Inventors

• Zhao Lei
• Xu Zhiyue

Classifications

• C04B2235/402

  Aluminium · CPC title

• C04B35/52

  based on carbon, e.g. graphite · CPC title

• E21B34/10 Primary

  operated by control fluid supplied from outside the borehole · CPC title

• C04B2235/405

  Iron group metals · CPC title

• F16K15/026

  the valve member being a movable body around which the medium flows when the valve is open · CPC title