Turbine drill bit assembly
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United States of America Patent
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Oct 23, 2018
Grant Date -
Sep 3, 2015
app pub date -
Sep 18, 2012
filing date -
Sep 18, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A turbine-drill bit assembly is disclosed. The assembly comprises a box connection turbine connected to a pin connection drill bit. The turbine has a turbine body around a turbine shaft, the turbine body having a turbine stabilizer. The drill bit has a bit gauge or a bit sleeve around a bit shank, an end of the turbine stabilizer nearest the drill bit being spaced a first maximum distance from an end of the bit gauge or bit sleeve. In addition, a shouldering interface is formed at respective abutment shouldering surfaces of the turbine shaft and bit shank when the drill bit is attached to the turbine shaft, the interface being spaced a second maximum distance from an end of the bit gauge or bit sleeve.
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