发明名称 METHOD FOR RENOVATION OF SURFACE DRESSINGS AROUND WELL CURBS, AND A COMPRESSIBLE DEVICE FOR USE IN THE METHOD
摘要 A method for renovating a well curb by lifting it to a first position, whereafter a compressible device is positioned around the well curb. Hereafter the well curb is lowered to a second position so that the compressible device is abutting the upper edge of the well, whereafter a casting material is injected into the cavity between the surface dressing and a filling around the well. Finally the well curb is lowered to a third and final position. Also, a compressible device for use in the method.
申请公布号 US2011076099(A1) 申请公布日期 2011.03.31
申请号 US20090569444 申请日期 2009.09.29
申请人 POULSEN BJARNE HENNING 发明人 POULSEN BJARNE HENNING
分类号 E01C11/22;E01C11/24 主分类号 E01C11/22
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