发明申请
- 专利标题: ROTARY DRAG BIT
- 专利标题(中): 旋转拖轮位
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申请号: US12019814申请日: 2008-01-25
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公开(公告)号: US20080179106A1公开(公告)日: 2008-07-31
- 发明人: David Gavia , Ryan J. Hanford , Lane E. Snell , Jason E. Hoines , Matthew R. Isbell , Eric E. McClain , Michael L. Doster
- 申请人: David Gavia , Ryan J. Hanford , Lane E. Snell , Jason E. Hoines , Matthew R. Isbell , Eric E. McClain , Michael L. Doster
- 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
- 主分类号: E21B10/43
- IPC分类号: E21B10/43
摘要:
A rotary drag bit includes a primary cutter row comprising at least one primary cutter and a multiple backup cutter group. The multiple backup cutter group comprises a first and second trailing cutter row, each comprising at least one cutter positioned to follow the at least one primary cutter. The rotary drag bit life is extended by the multiple backup cutter groups making the bit more durable and extending the life of the cutters. Further, the cutters of the multiple backup cutter group are configured to selectively engage a subterranean formation material being drilled, providing improved bit life and reduced stress upon the cutters. Other embodiments of rotary drag bits are provided.
公开/授权文献
- US07861809B2 Rotary drag bit with multiple backup cutters 公开/授权日:2011-01-04