A downhole tubular scraper is run in on slickline with an on board power supply. It features counter-rotating scrapers without an anchor in one embodiment or an anchor with single rotating scrapers. The scraper is selectively operated to conserve power in the power supply. A drive system uses a single driver to obtain counter-rotating motion in the scrapers.
申请公布号
WO2010120453(A2)
申请公布日期
2010.10.21
申请号
WO2010US28395
申请日期
2010.03.24
申请人
BAKER HUGHES INCORPORATED;LYNDE, GERALD, D.;XU, YANG