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Unformatted text preview: 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 2π radians/revolution)? Please show the torque in units of ftlbf. ( 29 f f f f hp 375 KW 502 hp 0.7457 KW lb ft lb ft 502 hp 33,000 16,566,000 min min lb ft rev min 16,566,000 21,093 ftlb min 2 radians 125 rev P P T π = = = = = = 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? 3 2 f 2 2 f 5,000 lb 150 gal ft 144 in min hp min 7.48 gal 33,000 lb ft in ft 438 hp P P = =...
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 Spring '08
 Taylor
 drill string, Horsepower, ft lb ft, min min lb

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