Method for determining the rotation speed of a drill bit
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United States of America Patent
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Jan 11, 1994
Grant Date -
N/A
app pub date -
Apr 29, 1992
filing date -
Sep 4, 1990
priority date (Note) -
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Abstract
A method for determining the rotation speed of the drill bit arranged at one end of a rotating drill string. According to the method, the axial acceleration at one point on the drill string is measured, this measurement is processed with a multiplying coefficient which depends upon the point on the drill string where the measurement is taken to determine the rotational speed of the drill bit.
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