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经营范围
发明名称
Roller-cone bits, systems, drilling methods, and design methods with optimization of tooth orientation
摘要
申请公布号
EP1498572(A3)
申请公布日期
2006.04.12
申请号
EP20040025232
申请日期
1999.08.31
申请人
HALLIBURTON ENERGY SERVICES, INC.
发明人
CHEN, SHILIN
分类号
E21B10/16;E21B10/08;E21B41/00
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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