Hardbanding material and process
OwnerLloyd Charpentier, Al Siegmundinventors
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Abstract
The present invention describes a hardbanding material and a process for producing a hardbanding material which greatly extends the life of tool joints and sections of steel pipe to which the material is applied. Granules of tungsten carbide are dropped into a melt puddle which is formed when a low carbon chrome based alloy is welded to an outside surface of a drill pipe. The tungsten carbide has a size ranging from about {fraction (25/40)} to about {fraction (40/60)} mesh, with a hardness greater than 3000 HV. Alternatively, the tungsten carbide has a size of {fraction (40/60)} mesh with a hardness of greater than 1700 HV.
Claims15
A material for hardbanding an end of a section of steel pipe, said material comprising:
- a low carbon chrome based alloy;
- and
- tungsten carbide granules.
A process for producing a hardbanded drill pipe whereby granules of tungsten carbide are dropped into a melt puddle which is formed when a low carbon chrome based alloy is welded to an outside surface of the drill pipe.
Dependencies are inferred from the claim text.