Find dynamic pressure drop in flow inside pipe and collars

Assignment Help Operation Management

Reference no: EM13902280

Given:

depth of the hole = 6000 ft (5500 ft drill pipe, 500 ft drill collars)

diameter of the hole = 8.75"

drill pipe = 4.5" oD, 16.6 lb/ft (3.826" lD)

drill collars = 6.75" OD, 2.813" lD

mud properties :

plastic fluid with p=70Ib/gal,

viscosity=30 cp,

tao(shear stress)=7.5lbfl(l00 sq ft)

recommended upward flow velocity in the annulus around the drill pipe = 120 ft/min

Find dynamic pressure drop in the flow inside the pipe and collars?

Reference no: EM13902280

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