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基本信息:
- 专利标题: Improvements in or relating to rotary drill bits
- 专利标题(中):Verbesserungen一个Bohrmeisseln
- 申请号:EP97300920.2 申请日:1997-02-13
- 公开(公告)号:EP0790386A2 公开(公告)日:1997-08-20
- 发明人: Newton, Alex , Murdock, Andrew , Deane, John , Barnes, Michael , Caraway, Douglas , Lamb, Haydn
- 申请人: CAMCO DRILLING GROUP LIMITED
- 申请人地址: Hycalog Oldends Lane Industrial Estate Stonehouse, Gloucestershire GL10 3RQ GB
- 专利权人: CAMCO DRILLING GROUP LIMITED
- 当前专利权人: CAMCO DRILLING GROUP LIMITED
- 当前专利权人地址: Hycalog Oldends Lane Industrial Estate Stonehouse, Gloucestershire GL10 3RQ GB
- 代理机构: Carter, Gerald
- 优先权: GB9603402 19960217
- 主分类号: E21B10/52
- IPC分类号: E21B10/52
摘要:
A rotary drill bit, for drilling holes in subsurface formations, comprises a bit body (10), cutting structures (14) mounted on the bit body, and a fluid supply system for supplying drilling fluid to the surface of the bit body, to cool and clean the cutting structures. The fluid supply system comprises a number of nozzles (17) mounted in the bit body, a main passage (20) in the bit body and a number of auxiliary passages (21) leading from the main passage to the nozzles. Some or all of the passages (20, 21) are at least partly lined with an erosion-resistant lining material (23). The lining material may comprise a hard facing applied to the internal surface of a preformed passage or a rigid tube which itself defines the internal surface of the passage.
摘要(中):
用于在地下构造中钻孔的旋转钻头包括钻头体(10),安装在钻头体上的切割结构(14)和用于向钻头体的表面提供钻井流体的流体供应系统以冷却 并清洁切割结构。 流体供给系统包括安装在钻头体中的多个喷嘴(17),钻头体中的主通道(20)和从主通道引导到喷嘴的多个辅助通道(21)。 部分或全部通道(20,21)至少部分地衬有抗侵蚀衬里材料(23)。 衬里材料可以包括施加到预成型通道的内表面的硬面或者其自身限定通道内表面的刚性管。
公开/授权文献:
- EP0790386A3 Improvements in or relating to rotary drill bits 公开/授权日:1998-03-25
IPC结构图谱:
E | 固定建筑物 |
--E21 | 土层或岩石的钻进;采矿 |
----E21B | 土层或岩石的钻进;从井中开采油、气、水、可溶解或可熔化物质或矿物泥浆 |
------E21B10/00 | 钻头 |
--------E21B10/46 | .以抗磨部件为特征的,例如,金刚石镶嵌 |
----------E21B10/50 | ..牙轮钻头 |
------------E21B10/52 | ...横刃型或金属镶齿型的镶嵌件的 |