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Drill bit: Difference between revisions
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# a rock bit (also called a [[roller cone bit]]) consists of teeth on wheels which turn as the drill stem is rotated. These teeth apply a crushing pressure to the rock, breaking it up into small pieces. | # a rock bit (also called a [[roller cone bit]]) consists of teeth on wheels which turn as the drill stem is rotated. These teeth apply a crushing pressure to the rock, breaking it up into small pieces. | ||
The original | The original patent for the [[dual cone roller bit|rotary rock bit]] was issued to [[Howard Hughes Sr.]] for his [[dual cone roller bit]] in 1909. It consisted of two interlocking wheels. [[Walter Benona Sharp]] worked very closely with Hughes in developing the Rock Bit. The success of this bit led to the founding of the [[Sharp-Hughes Tool Company]]. | ||
In 1933 two Hughes engineers invented the tricone bit. This bit has three wheels and is still the dominant bit in the market today. The Hughes patent for the tricone bit lasted until 1951, after which time other companies started making similar bits. However, the Hughes’s market share was still 40% of the worlds drill bit market in 2000. | In 1933 two Hughes engineers invented the tricone bit. This bit has three wheels and is still the dominant bit in the market today. The Hughes patent for the tricone bit lasted until 1951, after which time other companies started making similar bits. However, the Hughes’s market share was still 40% of the worlds drill bit market in 2000. | ||
