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发明名称
CEMENTING HEAD APPARATUS AND METHOD OF INJECTING A CEMENTING PLUG INTO A WELL CASING
摘要
申请公布号
GB2054698(A)
申请公布日期
1981.02.18
申请号
GB19800016587
申请日期
1980.05.20
申请人
DOW CHEMICAL CO
发明人
分类号
E21B33/05;(IPC1-7):E21B33/14
主分类号
E21B33/05
代理机构
代理人
主权项
地址
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