发明授权
- 专利标题: Cutting element for a rotary drill bit, and method for manufacturing such an element
- 专利标题(中): 切割元件的旋转钻头及其生产。
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申请号: EP89303298.7申请日: 1989-04-04
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公开(公告)号: EP0336698B1公开(公告)日: 1994-07-06
- 发明人: Barr, John Denzil , Newton, Thomas Alexander, Jr.
- 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: GB8807875 19880405; GB8826672 19881115
- 主分类号: E21B10/56
- IPC分类号: E21B10/56 ; E21B10/46
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