公开(公告)号：US10329843B2

公开(公告)日：2019-06-25

申请号：US15585343

申请日：2017-05-03

申请人： VAREL EUROPE S.A.S.

发明人： Sebastien Reboul ,  Bruno Cuillier De Maindreville ,  Alfazazi Dourfaye ,  Gilles Gallego

IPC分类号： E21B10/02 ,  E21B10/42 ,  E21B10/48 ,  E21B10/54 ,  E21B10/60 ,  E21B10/567 ,  E21B17/042

摘要： A drill bit includes a shank having a threaded coupling formed at an upper end thereof; a bit body mounted to a lower end of the shank and having a plenum; a gage section forming an outer portion of the drill bit; a cutting face forming a lower end of the drill bit and including: a core receptacle formed at a center of the cutting face, operable to receive a core of earth, and including: a concave core cutter mounted to a bottom of the bit body; and a core port extending from the plenum through the bottom of the bit body and operable to discharge drilling fluid onto the core and core cutter; a plurality of blades protruding from a bottom of the bit body and extending from a periphery of the core receptacle to the gage section; and a plurality of leading cutters mounted along each blade.

公开(公告)号：US20170335630A1

公开(公告)日：2017-11-23

申请号：US15585343

申请日：2017-05-03

申请人： VAREL EUROPE S.A.S.

发明人： Sebastien Reboul ,  Bruno Cuillier De Maindreville ,  Alfazazi Dourfaye ,  Gilles Gallego

IPC分类号： E21B10/02 ,  E21B10/48 ,  E21B10/567 ,  E21B10/54 ,  E21B10/60 ,  E21B10/42 ,  E21B17/042

CPC分类号： E21B10/02 ,  E21B10/42 ,  E21B10/48 ,  E21B10/54 ,  E21B10/567 ,  E21B10/602 ,  E21B10/605 ,  E21B17/042 ,  E21B2010/545

摘要： A drill bit includes a shank having a threaded coupling formed at an upper end thereof; a bit body mounted to a lower end of the shank and having a plenum; a gage section forming an outer portion of the drill bit; a cutting face forming a lower end of the drill bit and including: a core receptacle formed at a center of the cutting face, operable to receive a core of earth, and including: a concave core cutter mounted to a bottom of the bit body; and a core port extending from the plenum through the bottom of the bit body and operable to discharge drilling fluid onto the core and core cutter; a plurality of blades protruding from a bottom of the bit body and extending from a periphery of the core receptacle to the gage section; and a plurality of leading cutters mounted along each blade.