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发明名称
REVERSE FLUSHING DRILLING APPARATUS
摘要
申请公布号
AU556500(B2)
申请公布日期
1986.11.06
申请号
AU19820082699
申请日期
1981.04.16
申请人
JOHNSON, L.G., GOODY, J.L.
发明人
LAURIE GLEN JOHNSON;JOHN LESLIE GOODY
分类号
E21B10/60;E21B17/18;E21B21/00;E21B21/02;E21B21/08;E21B21/12;E21B21/14
主分类号
E21B10/60
代理机构
代理人
主权项
地址
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