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1. 发明公开

EP1428601A1 Gundrill 有权
标题翻译： Tieflochbohrer
公开(公告)号：EP1428601A1
公开(公告)日：2004-06-16
申请号：EP03104139.5
申请日：2003-11-10
申请人： Ford Global Technologies, LLC
发明人： Val, Yefim , Astakhov, Viktor P. , Link, Gregory
IPC分类号： B23B51/04
CPC分类号： B23B51/0486 , B23B2251/422 , B23B2251/424 , Y10T408/455 , Y10T408/9095 , Y10T408/9097
摘要： A gundrill and a method of forming deep holes using such a gundrill having an elongate tubular shank 242 and a cutting tip 244 with a novel profile is disclosed. The cutting tip 244 and tubular shank 242 are both provided with a tubular central region supplying pressurized drilling fluid and a non-circular fluid cross-section which defines a drilling fluid return path in conjunction with the bore of the hole being formed. The cutting tip cooperates with the bottom of the hole being formed such that the cutting tip 244 and the bottom of the hole form an outlet. The outlet size is carefully controlled in order to maintain relatively high drilling fluid pressure in the bottom end space and the flow of drilling fluid discharged from the end space is controlled to cool the cutting surfaces and to effectively remove chips as they formed.
摘要翻译：公开了一种使用具有细长管状柄242和具有新颖轮廓的切割尖端244的这种金刚砂形成深孔的方法。切割刀片244和管状柄242均设置有管状中心区域，其供应加压钻井液体和非圆形流体横截面，其与所形成的孔的孔结合形成钻井液返回路径。切割尖端与形成的孔的底部配合，使得切割刀片244和孔的底部形成出口。仔细控制出口尺寸，以便在底端空间中保持相对高的钻井液压力，并控制从端部空间排出的钻井液的流动，以冷却切割表面，并在其形成时有效地去除切屑。

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