A coring bit, including an outer hollow coring shaft, and a rotationally uncoupled internal sleeve disposed inside the outer hollow coring shaft. The rotationally uncoupled internal sleeve may be a non-rotating internal sleeve. The rotationally uncoupled internal sleeve may be a free- floating internal sleeve.
申请公布号
CA2455437(A1)
申请公布日期
2004.07.22
申请号
CA20042455437
申请日期
2004.01.20
申请人
SCHLUMBERGER CANADA LIMITED
发明人
TRAN, SONY;REID, LENNOX E.;LAUPPE, DEAN W.;SUNDQUIST, ROBERT WAYNE;HARRIGAN, EDWARD;CONTRERAS, GARY W.;HILL, BUNKER M.
