Mud Loss Calculation

Mud Loss Calculation

The length of the annulus or the length of the low-density fluid and mud 

density of the lost circulation can be calculated based on annulus capacity 

behind the drill collar. If the lost circulation volume is smaller than the annu￾lus volume against the drillpipe, the length of the annulus (i.e., loss height) 

can be expressed in terms of the volume of the low-density fluid pumped 

to balance the formation pressure, and annulus capacity. Mathematically,

If Vl

 < Van_dp, the length of the low-density fluid required in order to bal￾ance the formation pressure is given by:



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