Fixed cutter drill bits with thin, integrally formed wear and erosion resistant surfaces
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United States of America Patent
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Oct 24, 2000
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N/A
app pub date -
Mar 9, 1999
filing date -
Mar 9, 1999
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Abstract
A fixed-cutter drill bit for boring through earth has a body made predominately of high strength steel with thin erosion and abrasion resistant surfaces integrally formed in the steel in areas likely to encounter abrasive or erosive conditions. The drill bit may be formed by a rapid solid state densification (RSSDPM) process. The drill bit combines the high strength of conventional steel bits with design freedom and hardness equal to or greater than conventional matrix bits. Due to the manner in which the hard particles, such as tungsten carbide, are integrally held in a steel matrix, aggressive fluid hydraulics may be employed with the drill bit without unduly limiting the performance of the drill bit.
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