Coatings for reducing wear on rod pump components

Patent metadata

Field	Value
Publication number	US-2017167483-A1
Application number	US-201514966841-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Dec 11, 2015
Publication date	Jun 15, 2017
Grant date	—

Abstract

A pump for an oil and gas well includes a barrel with a surface configured to contact oil and gas well fluid. The pump further includes a first coating formed on at least a portion of the barrel surface. The first coating includes a combination of diamond particles and a composition including nickel and phosphorous. The pump also includes a plunger with a surface configured to contact oil and gas well fluid. The pump additionally includes a second coating formed on at least a portion of the plunger surface. The second coating includes a combination of tungsten carbide particles and a composition including cobalt and chromium.

First claim

What is claimed is:

1 . A rod pump component for an oil and gas well pump, said component comprising:
a substrate comprising a surface configured to contact oil and gas well fluid; and a coating formed on at least a portion of said surface, wherein said coating includes a combination of tungsten carbide particles and a composition comprising cobalt and chromium.

2 . The component in accordance with claim 1 , wherein said coating comprises a tungsten carbide particle concentration within a range from approximately 80 percent by weight to approximately 90 percent by weight.

3 . The component in accordance with claim 1 , wherein said tungsten carbide particles have a diameter less than or equal to approximately 5 micrometers (μm).

4 . The component in accordance with claim 1 , wherein said coating comprises a cobalt concentration within a range from approximately 5 percent by weight to approximately 15 percent by weight.

5 . The component in accordance with claim 1 , wherein said coating comprises a chromium concentration within a range from approximately 2 percent by weight to approximately 6 percent by weight.

6 . The component in accordance with claim 1 , wherein said coating is formed from thermal spray.

7 . The component in accordance with claim 6 , wherein said thermal spray is high velocity air-fuel spray.

8 . The component in accordance with claim 7 , wherein said high velocity air-fuel spray has a spray powder temperature within a range from approximately 800° Celsius (C) to approximately 1300° C.

9 . The component in accordance with claim 1 , wherein said coating is formed with a thickness within a range from approximately 100 μm to approximately 760 μm.

10 . A rod pump component for an oil and gas well pump, said component comprising:
a substrate comprising a surface configured to contact oil and gas well fluid; and a coating formed on at least a portion of said surface, wherein said coating includes a combination of diamond particles and a composition comprising nickel and phosphorous.

11 . The component in accordance with claim 10 , wherein said diamond particles have a diameter within a range from approximately 0.5 micrometers (μm) to approximately 4 μm.

12 . The component in accordance with claim 10 , wherein said coating comprises a diamond particle concentration within a range from approximately 25 volume percent to approximately 50 volume percent.

13 . The component in accordance with claim 10 , wherein said coating comprises a phosphorous concentration within a range from approximately 6 volume percent to approximately 13 volume percent.

14 . The component in accordance with claim 10 , wherein said coating has a thickness within a range from approximately 10 μm to approximately 152 μm.

15 . The component in accordance with claim 10 , wherein said coating is formed by an electroless nickel plating process.

16 . A pump for an oil and gas well, said pump comprising:
a barrel comprising a surface configured to contact oil and gas well fluid; a first coating formed on at least a portion of said barrel surface, said first coating including a combination of diamond particles and a composition comprising nickel and phosphorous; a plunger comprising a surface configured to contact oil and gas well fluid; and a second coating formed on at least a portion of said plunger surface, said second coating including a combination of tungsten carbide particles and a composition comprising cobalt and chromium.

17 . The pump in accordance with claim 16 , wherein said diamond particles have a diameter within a range from approximately 0.5 micrometers (μm) to approximately 4 μm.

18 . The pump in accordance with claim 16 , wherein said first coating is formed by an electroless nickel plating process.

19 . The pump in accordance with claim 16 , wherein said tungsten carbide particles have a diameter less than or equal to approximately 5 micrometers (μm).

20 . The pump in accordance with claim 16 , wherein said second coating is formed from high velocity air-fuel spray.

Assignees

• Gen Electric

Inventors

• Kool Lawrence Bernard
• Gray Dennis Michael

Classifications

• C23C18/32 Primary

  Coating with nickel, cobalt or mixtures thereof with phosphorus or boron (C23C18/50 takes precedence) · CPC title

• F04B53/16

  Casings; Cylinders; Cylinder liners or heads; Fluid connections · CPC title

• F04B53/14 Primary

  Pistons, piston-rods or piston-rod connections · CPC title

• F05C2211/00

  Inorganic materials not otherwise provided for · CPC title

• F05C2253/12

  Coating · CPC title