基本信息:
- 专利标题: ROTARY DRILL BIT WITH IMPROVED STEERABILITY AND REDUCED WEAR
- 专利标题(中):旋转钻头具有改进的可变性和减少磨损
- 申请号:PCT/US2008/058097 申请日:2008-03-25
- 公开(公告)号:WO2008118897A1 公开(公告)日:2008-10-02
- 发明人: CHEN, Shilin , ASHLIE, Riun
- 申请人: HALLIBURTON ENERGY SERVICES, INC. , CHEN, Shilin , ASHLIE, Riun
- 申请人地址: 10200 Bellaire Boulevard Houston, Texas 77072-5299 US
- 专利权人: HALLIBURTON ENERGY SERVICES, INC.,CHEN, Shilin,ASHLIE, Riun
- 当前专利权人: HALLIBURTON ENERGY SERVICES, INC.,CHEN, Shilin,ASHLIE, Riun
- 当前专利权人地址: 10200 Bellaire Boulevard Houston, Texas 77072-5299 US
- 代理机构: FELGER, Thomas R.
- 优先权: US60/908,337 20070327
- 主分类号: E21B10/00
- IPC分类号: E21B10/00
摘要:
A rotary drill bit having blades with cutting elements disposed on exterior portions thereof may be formed with either a continuous cutting zone or a substantially continuous cutting zone between the last cutting element on each blade and an adjacent gage pad. Such rotary drill bits may have improved steerability during the formation of a directional wellbore and/or may experience substantially reduced wear on gage pads and/or portions of each blade adjacent to respective gage pads. For some rotary drill bits an additional cutter may be disposed in one or more gage pads adjacent to the last cutting element. For other rotary drill bits a gage cutter may be disposed between and in close proximity to both the last cutting element and adjacent portions of the associated gage pad.
摘要(中):
具有设置在其外部部分上具有切割元件的刀片的旋转钻头可以在每个刀片上的最后切割元件和相邻的规格垫之间形成有连续切割区域或基本上连续的切割区域。 这种旋转钻头在形成定向井筒期间可具有改进的可操纵性和/或可能在量规垫和/或每个叶片的与相应的测量垫相邻的部分上的磨损显着降低。 对于一些旋转钻头,可以在与最后切割元件相邻的一个或多个计量垫中设置另外的切割器。 对于其他旋转钻头,量规切割器可以设置在相邻的量具垫的最后切割元件和相邻部分之间并且紧邻相邻的切割元件。
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 |