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发明名称
Dynamic pressure device for oil drill systems
摘要
申请公布号
GB2366308(B)
申请公布日期
2004.08.11
申请号
GB20010019844
申请日期
2001.08.14
申请人
* RYAN ENERGY TECHNOLOGIES INC
发明人
PAUL L * CAMWELL;MICHAEL T * SUTHERLAND;ANTHONY ROBERT * DOPE;DEREK W * LOGAN;RANDALL S * LISCOMBE
分类号
E21B47/01;E21B17/00;E21B21/08;E21B23/00;E21B23/02;E21B47/06;(IPC1-7):E21B21/08
主分类号
E21B47/01
代理机构
代理人
主权项
地址
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