A centralizer for a downhole system, such as but not limited to a casing system. In some embodiments, the centralizer has a tubular body and a plurality of roller ball assemblies circumferentially spaced about the tubular body. Each roller ball assembly includes a plurality of rotatable balls adapted to engage a surface radially offset from the centralizer and rotate relative to the surface in any direction.
申请公布号
WO2010127128(A2)
申请公布日期
2010.11.04
申请号
WO2010US32987
申请日期
2010.04.29
申请人
FLOTEK INDUSTRIES, INC.;WITTMAN, ROBERT H.;KELLER, GREGORY