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  1. offshore7024

    Torque on bottom & Torque off bottom of a drillstring

    Please Help - I am stuck on this one. How do I calculate off-bottom and on-bottom torque on a drillstring? What is the equation for this? The input I have are RPM, Pipe OD, Pipe Weight and Torque on Bit. Do I need any more inputs? Please explain as much as you can. Many thanks in advance.

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