Well packer assembly,申请号GB19900017016-传众专利搜索

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发明名称	Well packer assembly
摘要
申请公布号	GB2235714(A)	申请公布日期	1991.03.13
申请号	GB19900017016	申请日期	1990.08.02
申请人	* AVA INTERNATIONAL CORPORATION	发明人	NEIL H * AKKERMAN;AUBREY CLIFTON * MILLS
分类号	E21B23/06;E21B33/1295;E21B41/02;E21B47/10	主分类号	E21B23/06
代理机构		代理人
主权项
地址

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