| 摘要 |
<p>H:/xskuntenvoven/NRrtbhDCC/RXS/502501 I_.doc-j 310412013 An improved and enhanced spring loaded downhole tool for cleaning well casing bores comprising a mandrel, at least a first insert having a passageway therethrough, and at least a second insert, wherein both the first insert and the second insert are selected from at least one of a spring loaded scraper insert and at least one wire brush insert, and further wherein the first insert and the second insert are slidingly received within a slot on a first mounting portion on the mandrel and a slot on a second mounting portion on the mandrel, from the outermost respective ends, and wherein the first insert is secured by a first retaining sleeve and the second insert is secured by a second retaining sleeve. Also disclosed is a unique method for cleaning a section of casing with a downhole tool, as herein disclosed. WO 2008,'073986 PCT/US2007!087287 26-, L:</p> |
