HWK 10 solution

# HWK 10 solution - PGE 430 HWK 10 Solution Due in lecture...

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PGE 430 HWK 10 Solution Due in lecture Nov. 23 (1) For the data set that is given below please make the following calculations. ( 29 m p 10,000' BHT=225 deg F Surface Temp=100 deg F Temperature gradient = 1.65 deg F/100 with an ambient temperature of 60 deg F. 1.65 60 deg F 100 9.5 ppg =20 cp D D D T ρ μ = = + = Reservoir BHP=5,500 psi Drill pipe: 4.5", 16.6 ppf, Grade E Drill collars: 6.25" x 2.875" x 300' Bit: 8.75" with 2-12/32" and 1-13/32" nozzles. Pumps: Two PZ-9 with 5.5" diameter x 9" stroke liners and maximum pressure of 3,000 psi During drilling the pump rate is 500 gal/min (1) What is the equivalent circulating density (ECD) under normal drilling operations? You may use your spread sheet to predict friction pressures losses. From the spread sheet the annular friction pressure losses total 81 psi. The ECD is 81 8.33 9.5 9.66 ppg 10000 0.433 ECD = + = Note it the student uses a different formula for pressure drop the number may be slightly different. +1 pt (2) When the well encounters the reservoir, what will the shut in drill pipe pressure be after the BOP is closed? ( 29

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## This note was uploaded on 02/13/2012 for the course PGE 430 taught by Professor Chenevert during the Spring '06 term at University of Texas at Austin.

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HWK 10 solution - PGE 430 HWK 10 Solution Due in lecture...

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