发明名称 |
Drilling stabilizer |
摘要 |
A high-performance drilling stabilizer is provided that is high in both wear resistance and strength. Blades are bonded to a stabilizer body. The blade is split into at least two segments. The blade segments are bonded to the stabilizer body to form the blade. A laminate made of cemented carbide and having a laminate structure made up of at least two layers is bonded to the top of each of the blade segments. The laminate has a thickness of between 1 mm and 5 mm. The cobalt contents of the respective layers decrease stepwise from the innermost layer toward the outermost layer.
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申请公布号 |
US6202769(B1) |
申请公布日期 |
2001.03.20 |
申请号 |
US19990321224 |
申请日期 |
1999.05.27 |
申请人 |
JAPANESE NATIONAL OIL CORPORATION;JAPAN RESEARCH AND DEVELOPMENT CENTER FOR METALS |
发明人 |
IKEGAYA AKIHIKO;TSUDA KEIICHI |
分类号 |
E21B10/48;E21B17/10;(IPC1-7):E21B10/36 |
主分类号 |
E21B10/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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