发明授权
- 专利标题： Reverse circulation apparatus and methods of using same
- 专利标题（中）： 反循环装置及其使用方法
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申请号： US13032321申请日： 2011-02-22
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公开(公告)号： US09022146B2公开(公告)日： 2015-05-05
- 发明人: Sven Krueger , Volker Krueger , Jens-Uwe Bruns , Karsten Fuhst , Joerg Breitenfeld
- 申请人： Sven Krueger , Volker Krueger , Jens-Uwe Bruns , Karsten Fuhst , Joerg Breitenfeld
- 申请人地址： US TX Houston
- 专利权人： Baker Hughes Incorporated
- 当前专利权人： Baker Hughes Incorporated
- 当前专利权人地址： US TX Houston
- 代理机构： Cantor Colburn LLP
- 主分类号： E21B21/08
- IPC分类号： E21B21/08
摘要：
In one aspect, an apparatus for drilling a wellbore into an earth formation is disclosed, which apparatus, according to one embodiment, may include a drill string configured to be conveyed into a wellbore, wherein an annulus is formed between the drill string and a wellbore wall, a first flow device configured to circulate a first fluid from an annulus to a bore of the drill string, and a second flow device positioned downhole of the first flow device, the second flow device configured to circulate a second fluid from the bore of the drill string to the annulus.
公开/授权文献
- US20110203848A1 Reverse Circulation Apparatus and Methods of Using Same 公开/授权日：2011-08-25
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