Methods for applying abrasive wear-resistant materials to a surface of a drill bit

摘要

Methods for applying an abrasive wear-resistant material to a surface of a drill bit include providing a drill bit having a bit body formed of a material comprising one of steel material, particle-matrix composite material and cemented matrix material, mixing a plurality of −40/+80 ASTM mesh dense sintered carbide pellets in a matrix material, heating the matrix material to a temperature above the melting point of the matrix material, applying the molten matrix material and at least some of the dense sintered carbide pellets to at least a portion of an exterior surface of the bit body; and solidifying the molten matrix material.

主权项

1. A method for applying an abrasive wear-resistant material to a surface of a drill bit, the method comprising:
providing a drill bit having a bit body formed of a material comprising one of steel material, particle-matrix composite material and cemented matrix material, the bit body having an exterior surface; disposing at least one cutting element in a pocket extending from the exterior surface into the bit body to define at least one recess extending from the exterior surface into the bit body adjacent to the at least one cutting element, the at least one recess peripherally surrounding the at least one cutting element; mixing a plurality of −20 ASTM mesh dense sintered carbide pellets in a matrix material to provide a pre-application abrasive wear-resistant material, the matrix material comprising between about 30% and about 50% by weight of the pre-application abrasive wear-resistant material, the plurality of dense sintered carbide pellets comprising between about 30% and about 55% by weight of the pre-application abrasive wear-resistant material; heating the matrix material comprising heating at least a portion of the pre-application abrasive wear-resistant material to a temperature above the melting point of the matrix material to melt the matrix material; applying the molten matrix material and at least some of the dense sintered carbide pellets to the at least one recess; and solidifying the molten matrix material.