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发明名称
Well drilling system
摘要
申请公布号
US2250912(A)
申请公布日期
1941.07.29
申请号
US19390298700
申请日期
1939.10.09
申请人
PHILLIPS PETROLEUM COMPANY
发明人
HUDSON THOMAS B.;GERBER WAYNE S.
分类号
E21B4/02;F01C1/10
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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