10 min get strenght of mud, （lb/100 sq ft):

Inside diameter of drill pipe in inch（in）:

Length of drill string in ft（ft）:

Outside diameter of drill pipe in inch(in）:

Hole diameter in inch(in）:

Pressure required overcoming the mud’s gel strength inside the drill string.

Pressure required overcoming the mud’s gel strength in the annulus.

Pressure required to break circulation inside drill string(psi):