发明名称 NEW AND IMPROVED METHOD AND APPARATUS FOR CLEANING WELLBORE CASING
摘要 One or more brush bodies (20) fabricated from an incompressible material, for example, from high density polyurethane, high density polyethylene, high density polypropylene, nylon, Orlon, high density plastics, phenolic resin-based materials hard rubber, wood, aluminum, or other easily drillable metals, are connected to, or integrally fabricated with one or more elastomeric, conventional cement plugs (30), and are pumped down within the interior of oilfield casing (76) situated within an earth borehole, to minimize or eliminate the need to run a workstring of drillpipe and drill bit to clean out the interior of the string of casing (76).
申请公布号 CA2404894(C) 申请公布日期 2009.09.01
申请号 CA20012404894 申请日期 2001.04.02
申请人 M-I LLC 发明人 REYNOLDS, J. SCOTT
分类号 E21B37/04;E21B33/16;E21B37/10 主分类号 E21B37/04
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