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经营范围
发明名称
DOWNHOLE TOOL WITH LIQUID SPRING
摘要
申请公布号
EP0187690(B1)
申请公布日期
1990.07.18
申请号
EP19860200306
申请日期
1983.02.21
申请人
HALLIBURTON COMPANY
发明人
BARRINGTON, BURCHUS QUINTON
分类号
E21B34/00;E21B34/10;E21B49/00;E21B49/08
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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