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HWK 1 solution-1

# HWK 1 solution-1 - PGE 430 Drilling Homework 1 Solution Due...

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PGE 430 Drilling Homework 1 Solution Due at lecture time: W 9/9/09 (total possible score: 10.0) (1) A draw works is rated at 1500 input Hp. The maximum load that can be picked up is 1,000,000 lbs on 12 lines. Please show the equations required and prepare a table of results to show: (a) The velocity of the blocks (ft/min) for weights starting at 1,000,000 lbs and descending 100,000 lb increments. ( 29 ( 29 33,000 1500 0.77 33,000 38.1 ft/min 1,000,000 i b PE v W = = = (b) The velocity of the fast line. ( 29 12 38.1 457.2 ft/min f b v nv = = = (c) The required draw works drum speed in revolutions per minute (rpm) if the drum is 5’ in diameter. ( 29 2 ft revolution 457.2 29.1 rpm 2 min ft 5 D f D v v d π π = = = Note that the drum cannot be turned faster than 100 rpm. Do one example calculation at 1,000,000 lbs. (+1 pt for sample calculations) The other results can be in the table. (+1 pt for correct table) W (lbf) Vb (ft/min) Vf (ft/min) drum rpm 1,000,000 38.1 457.4 29.1 900,000 42.4 508.2 32.4 800,000 47.6 571.7 36.4 700,000 54.5 653.4 41.6 600,000 63.5 762.3 48.5 500,000 76.2 914.8 58.2 400,000 95.3 1,143.5 72.8 300,000 127.1 1,524.6 97.1 200,000 130.9 1,570.8 100.0 top speed (2) Please compute the volume of natural gas in MScf/Day that is required to provide the equivalent input power to an engine as diesel oil used at 40 gal/hour.

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