WELLBORE CONSOLIDATING TOOL FOR ROTARY DRILLING APPLICATIONS
摘要
A subpart (430) of a drill string (211) is described having an outer circumferential surface which is contoured and adapted to engage the wall of the borehole with a small angle of attack while exerting during rotary drilling operations an compacting pressure on mud cake and/or cuttings present in the annulus between the drill string and the borehole.
申请公布号
CA2510461(C)
申请公布日期
2011.09.13
申请号
CA20032510461
申请日期
2003.12.17
申请人
SCHLUMBERGER CANADA LIMITED
发明人
COOPER, IAIN;VERCAEMER, CLAUDE;LESSO, WILLIAM;JEFFRYES, BENJAMIN PETER;SHEPPARD, MICHAEL CHARLES