A downhole tool for increasing a diameter of a wellbore disposed within a subterranean formation. The downhole tool includes an underreamer having a plurality of cutter blocks moveably coupled thereto that move radially-outward from a refracted state to an expanded state. The cutter blocks cut the subterranean formation to increase the diameter of the wellbore from a first diameter to a second diameter when in the expanded state. A formation weakening tool may be coupled to the underreamer. The formation weakening tool weakens a portion of the subterranean formation positioned radially-outward therefrom.
申请公布号
EP3008276(A1)
申请公布日期
2016.04.20
申请号
EP20140810147
申请日期
2014.06.09
申请人
SMITH INTERNATIONAL, INC.
发明人
KESHAVAN, MADAPUSI K.;DESAI, PRAFUL;COOPER, LAIN M