发明名称 |
Down-hole Hammer Drill |
摘要 |
<p>- 23 Abstract A down-hole hammer comprising a drill bit (10) and a drive collar (11) with an interconnection therebetween for causing rotation of the drill bit upon rotation of the drive collar. The drill bit (10) comprises a drill bit head (13) and a shank (19), 5 the drill bit head (13) defining a cutting face (15) and having a circumferential shoulder section (17) adjacent the cutting face (15). The shank (19) extends from the shoulder section (17) in the direction away from the cutting face (15). The interconnection between the drill bit (10) and the drive collar (11) comprises a spline assembly including at least one spline (43) on the shoulder section (17) for 10 mating engagement with at least one counterpart spline (63) on the drive collar (11) to provide a drive coupling therebetween while also allowing the drill bit (10) to slide axially within the drive collar (11) to perform a percussive action. U'0) CfCo coBME!~ MIMEMBIto EINEMMIL_ L-OM IEi_ l</p> |
申请公布号 |
AU2010200838(B2) |
申请公布日期 |
2015.09.03 |
申请号 |
AU20100200838 |
申请日期 |
2010.03.04 |
申请人 |
AIRDRILL HAMMERS AND BITS PTY LTD |
发明人 |
GILBERT, ANDREW STEPHEN;THOMPSON, BARRY JOHN |
分类号 |
E21B4/14;E21B4/06;E21B6/00;E21B10/36 |
主分类号 |
E21B4/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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