Drill bit with improved removal of the drill core
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United States of America
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Issued Date -
Dec 5, 2024
app pub date -
Sep 28, 2022
filing date -
Sep 28, 2022
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Abstract
Drill bit (20) including a drilling shaft and a cutting portion having a first drilling segment (23-1) and a second drilling segment (23-2). The first drilling segment (23-1) has a first inner lateral surface (28-1) with a first inner distance (B1(φ, h)), and the second drilling segment (23-2) has a second inner lateral surface (28-2) with a second inner distance (B2(φ, h)) from the longitudinal axis (24) of the drilling shaft. The first inner distance (B1(φ, h)) varies between a first maximum value (Bmax,1) and a first minimum value (Bmin,1) over the circumference of the first drilling segment (23-1) and has precisely one first absolute minimum value (Bmin,1). The second inner distance (B2(φ, h)) is greater than or equal to the first absolute minimum value (Bmin,1) over the circumference of the second drilling segment (23-2).
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