Wellsite hardfacing with particle distribution and method of using same
AssigneeNational Oilwell Varco, L.P.
InventorsKevin Joseph Wyble, Alan Jay Harmon, Kevin Lawrence Williams, Cameron Spiller
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Abstract
A chromium-free, distributed hardfacing disposable on a surface of a wellsite component is disclosed. The hardfacing includes a metal filler (e.g., nickel) and particles distributed about the filler. The particles include pellets made of tungsten carbide and pieces made of angular molybdenum carbide. The pieces are smaller than the pellets for distribution in the filler between the pellets whereby a uniform distribution of particles is provided about the filler.
Claims36
A distributed hardfacing disposable on a surface of a component, the hardfacing comprising:
- a metal filler;
- and
- particles distributed about the metal filler, the particles comprising:
- pellets comprising tungsten carbide;
- and
- pieces comprising angular molybdenum carbide;
- wherein the pieces are smaller than the pellets for distribution in the metal filler between the pellets whereby a uniform distribution of the particles is provided about the metal filler.
A hardfaced wellsite component disposable into a wellbore, the wellsite component comprising:
- a metal component having an outer surface exposed to the wellbore;
- and
- a distributed hardfacing disposable on the outer surface of the wellsite component, the hardfacing comprising:
- a metal filler;
- and
- particles distributed about the metal filler, the particles comprising:
- pellets comprising tungsten carbide;
- and
- pieces comprising angular molybdenum carbide;
- wherein the pieces are smaller than the pellets for distribution in the metal filler between the pellets whereby a uniform distribution of the particles is provided about the metal filler.
A method of hardfacing a surface of a wellsite component, the hardfacing comprising:
- providing a metal wire comprising a metal filler;
- providing particles comprising pellets and pieces, the pellets comprising tungsten carbide, the pieces comprising molybdenum carbide;
- disposing the hardfacing to a surface of the wellsite component by:
- forming a hardfacing melt by heating the metal filler and mixing the heated metal filler with the particles;
- and
- applying the hardfacing melt to an outer surface of the wellsite component.
A welding wire for distributing hardfacing on a surface of a component, the welding wire comprising:
- a tubular coating having a cavity therein, the tubular coating comprising a metal filler;
- particles disposed within the cavity, the particles comprising:
- pellets comprising tungsten carbide;
- and
- pieces comprising angular molybdenum carbide;
- wherein, upon heating, the particles are distributed about the metal filler, the pieces being smaller than the pellets for distribution in the metal filler between the pellets whereby a uniform distribution of the particles is provided about the metal filler.
Dependencies are inferred from the claim text.