Method for hardfacing roller cone drill bit legs

Details Method for hardfacing roller cone drill bit legs Method for hardfacing roller cone drill bit legs

2006-09-05

2006-09-05

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S425000, C427S282000

Reexamination Certificate

active

07100712

ABSTRACT:
A roller cone drill bit includes a bit body adapted to be coupled to a drill string, at ne leg depending from the bit body, and a bearing journal on the at least one leg, wherein least one leg defines a shirttail portion at an end thereof. A method of manufacturing the cone drill bit includes assembling a roller cone onto the bearing journal on the at least one asking around the shirttail portion, and performing a spray cycle. The spray cycle includes ng the shirttail portion with hardfacing using a high pressure/high velocity oxygen fuel after the roller cone is assembled onto the bearing journal.

REFERENCES:
patent: 3158214 (1964-11-01), Wisler et al.
patent: 6955233 (2005-10-01), Crowe et al.

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