发明申请
US20100276207A1 ROLLING CONE DRILL BIT HAVING SHARP CUTTING ELEMENTS IN A ZONE OF INTEREST
有权
滚动锥形钻头在一个有利地区的夏普切割元素
- 专利标题: ROLLING CONE DRILL BIT HAVING SHARP CUTTING ELEMENTS IN A ZONE OF INTEREST
- 专利标题(中): 滚动锥形钻头在一个有利地区的夏普切割元素
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申请号: US12771346申请日: 2010-04-30
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公开(公告)号: US20100276207A1公开(公告)日: 2010-11-04
- 发明人: Giampaolo Ferrari , Gary Portwood , Carl A. Deen
- 申请人: Giampaolo Ferrari , Gary Portwood , Carl A. Deen
- 申请人地址: US TX Houston
- 专利权人: SMITH INTERNATIONAL, INC.
- 当前专利权人: SMITH INTERNATIONAL, INC.
- 当前专利权人地址: US TX Houston
- 主分类号: E21B10/08
- IPC分类号: E21B10/08
摘要:
A rolling cone drill bit comprises a bit body and a plurality of rolling cone cutters mounted on the bit body. Each cone cutter includes a plurality of gage cutting elements. Each gage cutting element has a cutting portion extending from a base portion to an extension height. Further, each gage cutting element contacts a gage curve at a gage curve contact point in a composite rotated profile view. Each gage cutting element has a cross-sectional area A1 in a first offset reference plane parallel to a base reference plane and offset from the base reference plane by an offset distance d1 equal to 10% of the extension height. The ratio of A1 to a cross-sectional area Ab of the base portion of each gage cutting element is less than 11%.
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