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公开(公告)号:EP3146140A1
公开(公告)日:2017-03-29
申请号:EP15796522.9
申请日:2015-05-25
发明人: BOSWELL, Peter
CPC分类号: E21B17/046 , E21B10/36 , E21B17/076 , E21B19/18
摘要: A retaining system (100) for a DTH hammer drill bit (25) having an outer surface with a plurality of stops (31) at an up-hole end (29) of the drill bit (25) the stops projecting radially outward from the outer surface and spaced by respective gaps (35). The retaining system has a ring (102) which is configured to pass over the stops (31) when in a first rotational position relative to the drill bit (25). However when the ring (102) is in a second rotational position relative to the drill bit (25) it prohibits passage of the stops (31) through the ring (102).
摘要翻译: 一种用于潜孔锤钻头(25)的保持系统(100),其具有在钻头(25)的上孔端(29)处具有多个止动件(31)的外表面,止动件 外表面并由相应的间隙(35)隔开。 保持系统具有环(102),该环(102)构造成当处于相对于钻头(25)的第一旋转位置时越过止动件(31)。 然而,当环(102)相对于钻头(25)处于第二旋转位置时,其阻止挡块(31)通过环(102)。