- 专利标题： Downhole drilling tools including low friction gage pads with rotatable balls positioned therein
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申请号： US15035717申请日： 2013-12-13
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公开(公告)号： US09790749B2公开(公告)日： 2017-10-17
- 发明人: Shilin Chen
- 申请人： Halliburton Energy Services, Inc.
- 申请人地址： US TX Houston
- 专利权人： Halliburton Energy Services, Inc.
- 当前专利权人： Halliburton Energy Services, Inc.
- 当前专利权人地址： US TX Houston
- 代理机构： Baker Botts L.L.P.
- 国际申请： PCT/US2013/075043 WO 20131213
- 国际公布： WO2015/088559 WO 20150618
- 主分类号： E21B10/55
- IPC分类号： E21B10/55 ; E21B10/60 ; E21B17/10 ; E21B12/04 ; E21B10/54
摘要：
In accordance with some embodiments, a downhole drilling tool comprises a bit body, a blade on an exterior portion of the bit body, and a gage pad on the blade. The gage pad includes a ball retainer and a ball located in the ball retainer such that an exposed portion of the ball is positioned to contact a wellbore and rotate in response to frictional engagement with the wellbore.
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