Cutting structure for drill bit

专利名称：Cutting structure for drill bit发明人：Barton Steven,Watson Dean

Travers,Murdock Andrew

申请号：EP01307913.2申请日：20010918公开号：EP1227214A2公开日：20020731

专利附图：

摘要：A drill bit for drilling a borehole having a bit body with an axis of rotation, aleading face, and a plurality of blades upstanding from the leading face. At least one ofthe blades terminates in a gauge pad having a gauge surface arranged, in use, to face a

wall of the borehole. The gauge surface being devoid of cutting elements and

terminating at an end remote from the blade at a junction with a gauge pad end wall. Thegauge pad carries a cutter having a face and a cutting edge located radially inward of thegauge surface, and the junction of the gauge surface and the gauge pad end wall crosses,radially, between the face of the cutter and the wall of the borehole. The gauge surfacemay be a substantially continuous surface, and may have at least one additional cutterlocated angularly between two adjacent blades of the drill bit.

申请人：Camco International (UK) Limited

地址：Hycalog, Oldends Lane Industrial Estate Stonehouse, Gloucestershire GL10 3RQGB

国籍：GB

代理机构：Bailey, Richard Alan

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