-
公开(公告)号:US20140311807A1
公开(公告)日:2014-10-23
申请号:US14353503
申请日:2012-10-26
发明人: Philipp Beierer , Raymond Hill
IPC分类号: E21B6/02
CPC分类号: E21B6/02 , E21B4/14 , E21B10/38 , E21B17/076
摘要: A down-the-hole hammer drill that delivers fluid to a cutting face has particular application, but not limited, to a reverse-circulation (RC) down-hole face sampling hammer drill is tailored to the design of the cutting face to improve flushing of the cutting face. An associated drill bit and drive sub are also disclosed.
摘要翻译: 将流体输送到切割面的钻孔锤钻具有特别的应用,但不限于反向循环(RC)井下采样锤钻,适合切割面的设计,以改善冲洗 的切面。 还公开了相关联的钻头和驱动副。