DRILLING SYSTEMS AND METHODS
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United States of America
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Issued Date -
Jan 2, 2020
app pub date -
Jul 2, 2018
filing date -
Jul 2, 2018
priority date (Note) -
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Abstract
A directional drilling system that includes a drill bit that drills a bore through rock. The drill bit includes an outer portion of a first material and an inner portion coupled to the outer portion. The inner portion includes a second material.
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