Method for the circulation of gas when drilling or working a well,申请号GB20050022336-传众专利搜索

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发明名称	Method for the circulation of gas when drilling or working a well
摘要
申请公布号	GB0522336(D0)	申请公布日期	2005.12.07
申请号	GB20050022336	申请日期	2005.11.02
申请人	PRECISION ENERGY SERVICES LTD.	发明人
分类号	E21B;E21B21/00;E21B21/06;E21B21/14	主分类号	E21B
代理机构		代理人
主权项
地址

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