Fabrication Method for Carbide Drilling Rig

A carbide drilling rig, comprising: a drill string containing at least one section of pipe; a drilling tool connected to said drill string and containing at least one carbide component; and surface equipment capable of rotating said drill string and drilling tool; wherein the carbide component comprises a body portion of carbide and an outer layer which is attached to said body without a transition layer or adherent material and which contains an ultra-hard material.

A fabrication method for a carbide drilling tool, comprising the steps of: forming a body portion comprising tungsten carbide; sintering body portion sufficiently to permit handling of body portion for further processing; applying a coating to a working surface of said body portion, coating comprising an ultra-hard material; after said applying step, subjecting said body portion and coating to a high temperature, high-pressure process to form a finished carbide component; and installing finished carbide component in a drilling tool.
 

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