发明名称 |
BALL HOLE WELDING USING THE FRICTION STIR WELDING (FSW) PROCESS |
摘要 |
A roller cone drill bit includes a bit body, at least one leg extending downward from the bit body, a journal on each leg, and a roller cone mounted on each journal. A ball race is configured between each journal and roller cone, and a plurality of retention balls is disposed within each ball race. A ball hole extends from the back face of each leg to the ball race, and a ball hole plug fits within the ball hole. The ball hole plug is secured to the leg by a friction stir weld. |
申请公布号 |
US2010078224(A1) |
申请公布日期 |
2010.04.01 |
申请号 |
US20090629201 |
申请日期 |
2009.12.02 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
STEEL RUSSELL J.;PACKER SCOTT M.;ROTH CARY A.;KESHAVAN MADAPUSI K. |
分类号 |
E21B10/22;B23K20/12;E21B10/06 |
主分类号 |
E21B10/22 |
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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