| 摘要 |
A drilling torque and drag monitoring method for a drillstring (16) in a well bore (12) including the steps of measuring hook load and axial displacement of the drillstring (16), measuring surface torque and angular rotation of the drillstring (16), correlating the hook load with the axial displacement of the drillstring (16) so as to produce a first graphical relationship, correlating the surface torque and the angular rotation measurements of the drillstring (16) so as to produce a second graphical relationship, and comparing the first and second graphical relationships so as to determine a contact resistance between the drillstring (16) and the well bore (12). These relationships can be used independently or jointly so as to determine the condition of contact resistance. The method includes the step of identifying a slope discontinuity along the graphical curve indicative of a contact resistance.
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