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发明名称
THE CONTROL OF `U' TUBING IN THE FLOW OF CEMENT IN OIL WELL CASINGS
摘要
申请公布号
GB2236783(A)
申请公布日期
1991.04.17
申请号
GB19900021545
申请日期
1990.10.03
申请人
* STIRLING DESIGN INTERNATIONAL LTD
发明人
PAUL DOUGLAS MAXWELL * GULLETT
分类号
E21B21/10
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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