HOW DRILLSTRING ROTATION AFFECTS CRITICAL BUCKLING LOAD?
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helmerichpayne
Ongoing, First published Sep 29, 2023
automateddirectionaldrillingdrillingautomationdrillingrigcontractoroilandgasdrillingtechnologyhelmerichandpayne
Indeed, some simultaneous torque-drag-buckling calculations are presented and allow to properly take into account the additional contact force generated in a post-buckling configuration, and as a consequence the additional torque at surface. 

Secondly, this paper shows the influence of friction and rotation on buckling loads for some practical and critical cases met in the drilling industry. 

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