I need help about RPM and torque design

[mariosarmiento]

I want to know how I calculate the max RPM and torque that I must have in each section of the well.

[BOUGHELOUM]

maximum RPM based in the vibration of drillstring (lateral torsionalew...)
all egineers use a software like landmark wellpplan (torq and drag modul and critical rotary speed modul)