<p>A method and apparatus for drilling a bore through a target is disclosed. The method includes the steps of advancing a drill bit into the target along a direction of advancement and injecting a directing gas in the direction of advancement through at least one aperture in the drill bit whereby as the bore is drilled waste material is directed in the direction of advancement via the gas.</p>
申请公布号
EP1641593(B1)
申请公布日期
2007.09.19
申请号
EP20040743259
申请日期
2004.07.05
申请人
BRITISH NUCLEAR FUELS PLC
发明人
DANIEL, GERALD ALBERT;BROADHURST, BRENT;HARKENS, JAMES PHILIP;ROBSON, COLIN JAMES