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1. 发明公开

EP0872625A2 Rotary drill bits with nozzles 失效
标题翻译： Drehbohrmeissel mitDüsen
公开(公告)号：EP0872625A2
公开(公告)日：1998-10-21
申请号：EP98302826.7
申请日：1998-04-09
申请人： Camco International (UK) Limited
发明人： Newton, Alex , Tomczak, Michael , Taylor, Steven , Murdock, Andrew , Clegg, John Martin
IPC分类号： E21B10/60 , E21B10/54
CPC分类号： E21B10/55 , E21B10/003 , E21B10/26 , E21B10/60 , E21B10/602 , E21B17/1092
摘要： A rotary drill bit for connection to a drill string and for drilling boreholes in subsurface formations comprises a bit body having a leading face and a gauge region (191). Cutting elements 194 are mounted along blades (192) which extend outwardly on the leading face of the bit body so as to define fluid channels (200) between the blades. Nozzles (212) are mounted in the bit body for supplying drilling fluid to the channels for cleaning and cooling the cutting elements. There is an opening (206) in each circumferentially alternate channel (200), each of which openings leads into an enclosed passage (208) which passes internally through the bit body to a respective outlet. A bearing surface (210) is disposed at a portion of the gauge region radially outwardly from each opening, and each circumferentially alternate channel which is not provided with an opening leading to an internal passage has at its outer extremity a junk slot (202) extending through the gauge region.
摘要翻译：用于连接钻柱并用于在地下地层中钻孔的旋转钻头包括具有前表面和测量区（191）的钻头体。切割元件194沿着在钻头体的前表面向外延伸的刀片（192）安装，以便在刀片之间限定流体通道（200）。喷嘴（212）安装在钻头体中，用于将钻井液供给到用于清洁和冷却切割元件的通道。在每个周向交替的通道（200）中有一个开口（206），每个开口都通向内部通过钻头体的相应出口的封闭通道（208）。轴承表面（210）设置在每个开口的径向向外的测量区的一部分处，并且没有设置有通向内部通道的开口的每个周向交替通道在其外端处具有延伸的垃圾槽（202）通过仪表区域。

2. 发明授权

EP0872625B1 Rotary drill bits with nozzles 失效
标题翻译：旋转钻头带喷嘴
公开(公告)号：EP0872625B1
公开(公告)日：2005-11-16
申请号：EP98302826.7
申请日：1998-04-09
申请人： Camco International (UK) Limited
发明人： Newton, Alex , Tomczak, Michael , Taylor, Steven , Murdock, Andrew , Clegg, John Martin
IPC分类号： E21B10/60 , E21B10/54 , E21B10/26
CPC分类号： E21B10/55 , E21B10/003 , E21B10/26 , E21B10/60 , E21B10/602 , E21B17/1092

3. 发明公开

EP0872625A3 Rotary drill bits with nozzles 失效
标题翻译：旋转钻头带喷嘴
公开(公告)号：EP0872625A3
公开(公告)日：2000-04-05
申请号：EP98302826.7
申请日：1998-04-09
申请人： Camco International (UK) Limited
发明人： Newton, Alex , Tomczak, Michael , Taylor, Steven , Murdock, Andrew , Clegg, John Martin
IPC分类号： E21B10/60 , E21B10/54 , E21B10/26
CPC分类号： E21B10/55 , E21B10/003 , E21B10/26 , E21B10/60 , E21B10/602 , E21B17/1092
摘要： A rotary drill bit for connection to a drill string and for drilling boreholes in subsurface formations comprises a bit body having a leading face and a gauge region (191). Cutting elements 194 are mounted along blades (192) which extend outwardly on the leading face of the bit body so as to define fluid channels (200) between the blades. Nozzles (212) are mounted in the bit body for supplying drilling fluid to the channels for cleaning and cooling the cutting elements. There is an opening (206) in each circumferentially alternate channel (200), each of which openings leads into an enclosed passage (208) which passes internally through the bit body to a respective outlet. A bearing surface (210) is disposed at a portion of the gauge region radially outwardly from each opening, and each circumferentially alternate channel which is not provided with an opening leading to an internal passage has at its outer extremity a junk slot (202) extending through the gauge region.

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