HIGH STRENGTH CORROSION RESISTANT HIGH VELOCITY OXY FUEL (HVOF) COATING FOR DOWNHOLE TOOLS

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...

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Bibliographische Detailangaben
Hauptverfasser:	PILLAI, RAJAGOPALA, SUE, JIINJEN ALBERT, SRESHTA, HAROLD
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	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. L'invention concerne un outil de fond de trou comprenant un corps fabriqué dans un métal ou un alliage métallique. De plus, un revêtement est disposé sur le corps de l'outil de fond de trou. Le revêtement comprend au moins 75 % en volume de carbure de tungstène ayant une grosseur de grain moyenne inférieure à 1,0 µm. La teneur en carbure de tungstène dans le revêtement de grosseur de grain inférieure à 0,5 µm est comprise entre 40 et 64 % en volume du revêtement.