公开(公告)号：EP2142749A2

公开(公告)日：2010-01-13

申请号：EP08806993.5

申请日：2008-04-22

申请人： Total S.A.

发明人： NAEGEL, Matthieu ,  DELWICHE, Robert ,  DESMETTE, Sébastian ,  DESCHAMPS, Benoît ,  HAHATI, Abdelhakim

IPC分类号： E21B10/04 ,  E21B10/43 ,  E21B10/02 ,  E21B49/02

CPC分类号： E21B10/02 ,  E21B10/485 ,  E21B10/55 ,  E21B25/005 ,  E21B25/10

摘要： The invention relates to a bit for drilling wells comprising: - a front face, - a plurality of radial blades (2) provided with cutting elements (3), the blades being distributed around the front face, - a space (4) for forming a core (10), the space being situated at the centre of the front face, - a cavity (5) for evacuating the core towards the periphery of the bit, the cavity being situated between two adjacent blades. The invention also relates to a method for drilling wells using the bit. The invention makes it possible to rapidly drill wells of great depth in all types of rocks without the risk of clogging.

公开(公告)号：EP2142749B1

公开(公告)日：2012-04-04

申请号：EP08806993.5

申请日：2008-04-22

申请人： Total S.A.

发明人： NAEGEL, Matthieu ,  DELWICHE, Robert ,  DESMETTE, Sébastian ,  DESCHAMPS, Benoît ,  HAHATI, Abdelhakim

IPC分类号： E21B10/48 ,  E21B10/55 ,  E21B10/04 ,  E21B10/43 ,  E21B49/02

CPC分类号： E21B10/02 ,  E21B10/485 ,  E21B10/55 ,  E21B25/005 ,  E21B25/10

摘要： The invention relates to a bit for drilling wells comprising: - a front face, - a plurality of radial blades (2) provided with cutting elements (3), the blades being distributed around the front face, - a space (4) for forming a core (10), the space being situated at the centre of the front face, - a cavity (5) for evacuating the core towards the periphery of the bit, the cavity being situated between two adjacent blades. The invention also relates to a method for drilling wells using the bit. The invention makes it possible to rapidly drill wells of great depth in all types of rocks without the risk of clogging.