Adriller is pulling on a stuck drillstring. the derrick is capable of supporting a maximum equivalent derrick load of 5 lbf, the drilling line has a strength of 51200 lbf, and the strength of the drillpipe in tension is 396000 lbf. if eight lines are strung between the crown block and the travelling block and safety factor of 2.0 are required for the derrick, drillpipe and drilling line, how hard can the driller pull trying to free the stuck pipe?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10