Blar i NTNU Open på forfatter "Holhjem, Eirik Wilhelmsen"
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Parameter Estimation of Axial Pipe Movement of an Oil Field Drill String
Holhjem, Eirik Wilhelmsen (Master thesis, 2017)Drill strings are long slim rods used in well drilling to transmit torque and weight to the drill bit from the surface. As a consequence, these narrow structures experience various vibrations that could damage the well ...