Hardfaced drill bit structures and methods for making such...

Details Hardfaced drill bit structures and methods for making such... Hardfaced drill bit structures and methods for making such...

B - Operations, Transporting

21

K

B21K 5/02 (2006.01) B23P 15/28 (2006.01) E21B 10/46 (2006.01)

Patent

CA 2357569

A method is disclosed for forming a drill bit structure to which a cutting element is to be affixed. The method includes applying a layer of hardfacing material to a basic bit structure, removing the layer of hardfacing material in a location to which the cutting element is to be affixed, and forming an attachment structure at the location. In one embodiment, the removing is performed by electrode discharge machining. In one embodiment, the basic bit structure is a roller cone, and the cutting element is an insert adapted to be interference fit within a socket in the roller cone.

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