发明名称 |
Diamond transition layer construction with improved thickness ratio |
摘要 |
An insert for a drill bit may include a metallic carbide body; an outer layer of polycrystalline diamond material on the outermost end of the insert, the polycrystalline diamond material comprising a plurality of interconnected first diamond grains and a first binder material in interstitial regions between the interconnected first diamond grains; and at least two transition layers between the metallic carbide body and the outer layer, the at least two transition layers comprising: an outermost transition layer comprising a composite of second diamond grains, first metal carbide or carbonitride particles, and a second binder material; and an innermost transition layer comprising a composite of third diamond grains, second metal carbide or carbonitride particles, and a third binder material wherein a thickness of the outer layer is lesser than that of each of the at least two transition layers. |
申请公布号 |
AU2010279280(B2) |
申请公布日期 |
2016.11.03 |
申请号 |
AU20100279280 |
申请日期 |
2010.08.06 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
Mourik, Nephi A.;Cariveau, Peter T.;Stewart, Michael;Bellin, Federico;Fang, Yi |
分类号 |
E21B10/46;E21B10/08;E21B10/42;E21B10/52;E21B10/54 |
主分类号 |
E21B10/46 |
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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