公开(公告)号：US20160348442A1

公开(公告)日：2016-12-01

申请号：US15114605

申请日：2014-12-15

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Andreas RINDESKAR ,  John HAMMARGREN

IPC: E21B10/38 ,  E21B10/40

CPC classification number: E21B10/38 ,  E21B10/40

Abstract: A percussive rock drill bit has a head and a shank in which a plurality of flushing grooves extend radially outward and axially rearward from a front face. The flushing grooves are configured to optimize the axially rearward flow of rock particles and fines entrained in the flushing fluid. In particular, each groove is generally convex relative to a longitudinal axis of the drill bit and is declined continuously relative to the axis from a first groove end to a second groove end.

Abstract translation: 冲击式凿岩钻头具有头部和柄部，其中多个冲洗槽从前表面径向向外并且向后轴向延伸。 冲洗槽构造成优化岩石颗粒和夹带在冲洗流体中的细颗粒的轴向向后流动。 特别地，每个凹槽相对于钻头的纵向轴线通常是凸的，并且相对于从第一凹槽端到第二凹槽端的轴线连续地下降。