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经营范围
发明名称
Non-rotating cementing plug with molded inserts
摘要
申请公布号
US5095980(A)
申请公布日期
1992.03.17
申请号
US19910656545
申请日期
1991.02.15
申请人
HALLIBURTON COMPANY
发明人
WATSON, BROCK W.
分类号
E21B29/00;E21B33/12;E21B33/16
主分类号
E21B29/00
代理机构
代理人
主权项
地址
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