Steel armor wire coatings

Patent metadata

Field	Value
Publication number	US-9446565-B2
Application number	US-201414470708-A
Country	US
Kind code	B2
Filing date	Aug 27, 2014
Priority date	Aug 27, 2014
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A wire includes a ferrous core. The ferrous core can be coated. The coatings can include nickel, molybdenum, zinc and Fe. A process of forming a wire can include placing a metal strip alongside a ferrous wire core, bending the strip around the core, and seam welding the strip to form a metal tube around the core. The process of forming a wire can include applying a metal layer to a ferrous metal rod to form a plated rod, placing a metal strip alongside the rod, bending the strip around the rod, and seam welding the strip to form a metal tube around the rod. The process of forming a wire can include coating a ferrous wire core with a layer of nickel, molybdenum or a nickel alloy that circumferentially surrounds the ferrous wire core.

First claim

What is claimed is:

1. A wire comprising:
a ferrous wire core;
an interface layer circumferentially surrounding the ferrous wire core, the interface layer comprising nickel, molybdenum or a nickel alloy;
an Fe layer circumferentially surrounding the interface layer;
an outer layer circumferentially surrounding the interface layer, the outer layer comprising zinc or a zinc alloy, and wherein the outer layer circumferentially surrounds the Fe layer.

2. The wire of claim 1 , wherein the ferrous wire core is steel.

3. The wire of claim 1 , wherein the interface layer has a thickness of between 2 and 60 microns.

4. The wire of claim 1 , wherein outer layer has a thickness of between 1 and 50 microns.

5. The wire of claim 1 , wherein the outer layer comprises the zinc alloy, and wherein the zinc allow comprises:
binary Zn—Ni or Zn—Co alloy; or
ternary Zn—Ni—Co, Zn—Ni—Mo or Zn—Co—Mo alloy.

6. The wire of claim 1 , wherein the Fe layer has a thickness of between 2 and 20 microns.

7. The wire of claim 1 , further comprising a galvanized zinc coating.

8. A wire comprising:
a ferrous wire core;
an inner zinc layer circumferentially surrounding the ferrous wire core;
an Fe layer circumferentially surrounding the inner zinc layer; and
an interface layer circumferentially surrounding the Fe layer, the interface layer comprising nickel or molybdenum.

9. The wire of claim 8 , wherein the inner zinc layer has a thickness of between 2 and 50 microns.

10. The wire of claim 8 , further comprising a galvanized zinc coating.

Assignees

• Schlumberger Technology Corp

Inventors

• Hughes Trevor
• Varkey Joseph
• Protasov Vadim
• Barmatov Evgeny
• Wanjau Paul

Classifications

• C22C30/06

  containing zinc · CPC title

• C22C27/04

  Alloys based on tungsten or molybdenum · CPC title

• B32B15/015 Primary

  the said other metal being copper or nickel or an alloy thereof · CPC title

• C23C2/26

  After-treatment (C23C2/14 takes precedence) · CPC title

• C23C16/06

  characterised by the deposition of metallic material · CPC title