基于幂律流体的许用起下钻速度

The Allowable Velocity of Pipe Trip Based on Power Law Fluid

本文以起钻时保持井底有效压力大于或等于地层压力，下钻时保持易漏层位井内有效液柱压力小于其破裂压力为条件，建立了各种工况下基于幂律流体的许用起下钻速度计算式。

This paper establishes the equations of the allowable velocity of pipe trip based on powerlaw fluid in differentoworking conditions, under the condition that the effective bottom holepressure remains greater than or equal to formation pressure during the pulling of the pipeout of the hole,and that the effective liquid column in the hole in leakage sones remain smaller than fracture pressure during the running of the pipe into the hole.