发明名称 Protective cover assembly for a well casing and a method of protecting a well casing
摘要 A protective cover assembly for a water well is provided. The cover assembly includes a cover member which covers and completely encloses the above ground projecting end portions of a well casing and an associated electrical conduit. The cover member has an annular skirt surrounding its lower end which is disposed below ground when the cover assembly is placed over the projecting end portions of the well casing and conduit.
申请公布号 US4905764(A) 申请公布日期 1990.03.06
申请号 US19890376396 申请日期 1989.07.06
申请人 LAPUT, WILLIAM 发明人 LAPUT, WILLIAM
分类号 E21B33/03 主分类号 E21B33/03
代理机构 代理人
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