发明名称 |
Method for hardfacing roller cone drill bit legs |
摘要 |
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.
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申请公布号 |
US2006027402(A1) |
申请公布日期 |
2006.02.09 |
申请号 |
US20050239808 |
申请日期 |
2005.09.30 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
CROWE JOHN R.;GREIG ANGUS;HAMILTON ROBERT;FARQUHAR GARY;ANGUS KEVIN |
分类号 |
E21B10/00;C23C4/00;C23C30/00;E21B10/50 |
主分类号 |
E21B10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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