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Mid-Term 09 solution

# Mid-Term 09 solution - PGE 430 Drilling Mid-Term Exam Name...

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PGE 430 Drilling Mid-Term Exam Name: _____________________ This is a closed book, closed notes test. You will be given a set of equation and chart pages you may use. You will need a pen or pencil and a calculator. Extra paper is available should you need any. You may not bring in any other paper. Please turn in all paper at the end of the exam, including the equation pages.

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(1) (+1 pt) Using the following free body diagram please determine the force on the fast line and the velocity of the traveling block if the draw works power being used is 1,000 hp and the force on the static (or dead) line is measured as 50,000 lbs. The blocks are strung on 10 lines and the efficiency is 0.81. Recall that ( 29 ( 29 fast line force (lbs) 50,000 61,728 lbs 0.81 power (hp) 33,000 50,000 10 1000 33,000 33,000 0.81 53.5 ft/min torque or work being done (ft-lbs) time increment to accomplish the work f f W F nE F T P E t v vW E v T t = = = = = = = = = = ∆ = (min) hook load (lbs) number of lines strung block efficiency W n E = = = traveling block crown block W f F S F
(2) (+2 pts) A triplex mud pump has three cylinders with 5.5” liners and a 9” stroke. The pump can be run at 100 stokes/minute. (a) Determine the pump output in gal/stroke. Recall that there are 231 cubic inches in one gallon and that one stroke displaces the volume of the cylinders. You may assume the pump is 100% efficient.

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Mid-Term 09 solution - PGE 430 Drilling Mid-Term Exam Name...

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