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Unformatted text preview: of the drill string. A machine called a top drive provides the power necessary to create the torque at a given rotating speed. The top drive is suspended in the derrick and connected directly to the top of the drill pipe. (3) What is the maximum torque a 375 KW top drive can produce at 125 revolutions/minute (recall that there are 2 radians/revolution)? Please show the torque in units of ft-lbf. The mud pumps are required to circulate drilling mud from the surface through the inside of the drill string and back to the surface in the annulus between the hole and the outside of the drill pipe. (4) A pump is required to circulate mud at 150 gal/min with a pressure of 5,000 psi. What is the hydraulic horsepower of the pump?...
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- Spring '08