发明申请
- 专利标题: DRILLING AND GROUTING METHOD AND APPARATUS
- 专利标题(中): 钻井和组装方法和装置
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申请号: US14438874申请日: 2012-12-21
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公开(公告)号: US20150252639A1公开(公告)日: 2015-09-10
- 发明人: Luca Barison , Larry Goff , Laurent Lefebvre , Steve England , Stefano Gabaldo , Michael Justason
- 申请人: SOLETANCHE FREYSSINET
- 国际申请: PCT/EP2012/076766 WO 20121221
- 主分类号: E21B21/12
- IPC分类号: E21B21/12 ; E21B21/10 ; E21B33/138 ; E21B17/18
摘要:
A drilling and grouting device comprises a drill string including a hollow elongate outer rod having a central axis and a hollow elongate inner rod located coaxially within said outer rod, wherein a first outer flow path is defined between said inner and outer rod, and a first central flow path is defined inside said inner rod, a drill bit aligned with said inner rod along said central axis and including a second central flow path, and a crossover part interposed between said inner rod and said drill bit along said central axis, which is configured to connect the first central flow path with a second outer flow path surrounding the drill bit to form a main path and to connect said first outer flow path with said second central flow path to form a secondary path. Also disclosed are systems and methods that include and use the device.
公开/授权文献
- US09896894B2 Drilling and grouting method and apparatus 公开/授权日:2018-02-20