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US 10,590,704 B2Granted
High strength corrosion resistant high velocity oxy fuel (HVOF) coating for downhole tools
AssigneeNational Oilwell Varco, L.P.
InventorsJiinjen Albert Sue, Harold Sreshta, Rajagopala Pillai
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Abstract
A downhole tool comprises a body made of a metal or metal alloy. In addition, the downhole tool comprises a coating disposed on the body. The coating includes at least 75 vol % tungsten carbide having an average grain size less than 1.0 μm. The content of tungsten carbide in the coating with a grain size less than 0.5 μm is between 40 and 64 vol % of the coating.
Claims14
A downhole tool, comprising:
- a body made of a metal or metal alloy;
- a coating disposed on the body;
- wherein the coating includes at least 75 vol % tungsten carbide having an average grain size less than 1.0 μm;
- and
- wherein the coating includes only 40 to 64 vol % tungsten carbide with a grain size less than 0.5 μm.
2 more elements
Dependencies are inferred from the claim text.