Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Benjamin Jeffryes0
Date of Patent
March 24, 2015
0Patent Application Number
131414230
Date Filed
November 4, 2009
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A method of determining movement dynamics of a drillstring is provided that includes the steps of calculating or measuring a friction coefficient for the sliding contact between the drillstring and the sidewall of a borehole, the friction coefficient being a varying function of non-zero sliding velocities; and predicting movement dynamics of the drillstring using the measured friction coefficient.
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