Suppose that 280.5 bbl/day of 23 api, 1.05 cp oil is being produced through 2 7/8-in., 8.6-lbm/ft tubing in a well that is vertical. if the tubing wall relative roughness is 0.001, calculate the pressure drop over 2000 ft of tubing.

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.

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