发明名称 |
CASING FRIENDLY, SHEARABLE HARDBANDS AND SYSTEMS AND METHODS FOR SHEARING SAME |
摘要 |
A tool joint comprises a body having a central axis, a first end, and a second end opposite the first end, wherein the body is made of a first material having a first hardness. In addition, the tool joint comprises an annular hardband disposed about the body. The hardband is made of a second material. The second material comprises a base material and a plurality of discrete pellets dispersed throughout the base material. The base material has a second hardness and the pellets have a third hardness. The second hardness is substantially the same as the first hardness. The third hardness is greater than the second hardness and less than the hardness of tungsten carbide. |
申请公布号 |
US2012067563(A1) |
申请公布日期 |
2012.03.22 |
申请号 |
US201113232438 |
申请日期 |
2011.09.14 |
申请人 |
JELLISON MICHAEL JOSEPH;NATIONAL OILWELL VARCO, L.P. |
发明人 |
JELLISON MICHAEL JOSEPH |
分类号 |
E21B33/06;B05D1/36;F16D9/06 |
主分类号 |
E21B33/06 |
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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