发明名称 |
Earth-burning bit having an improved hard-faced tooth structure |
摘要 |
An earth-boring bit has a bit body, at least one cutter rotatably secured to the bit body and including a plurality of teeth formed integrally with the cutter and arranged in circumferential rows thereon. A pair of ribs is formed on at least one of the flanks of at least one of the teeth. The ribs are spaced apart to define a central depression therebetween extending through the crest of the tooth. A thickness of wear-resistant material fills the depression. According to a preferred embodiment of the present invention, wear-resistant material is applied over the ribs, crest, and a portion of the ends and flanks of the tooth, wherein the thickness of the wear-resistant material over the depressions greater, preferably 1/8 inch, than that elsewhere on the tooth.
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申请公布号 |
US5445231(A) |
申请公布日期 |
1995.08.29 |
申请号 |
US19940279583 |
申请日期 |
1994.07.25 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
SCOTT, DANNY E.;LU, MOU-CHIH;PESSIER, RUDOLF C. O. |
分类号 |
E21B10/50;(IPC1-7):E21B10/16 |
主分类号 |
E21B10/50 |
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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