Rop 250 300 12 spe 116667 500 500 wob 20000

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Unformatted text preview: ydraulic Contribution / Mechanical Contribution = [(MSE - DSE)/MSE]*100 Bit Hydraulic Contribution / Mechanical Contribution = [(MSE - DSE)/MSE]*100 WOB = 20,000 lb 45.0% 40.0% 35.0% WOB = 30,000 lb 30.0% 25.0% WOB = 40,000 lb 20.0% 1 15.0% 3 10.0% 2 5.0% 0.0% 0.0 1.0 2.0 3.0 HSI, hp/in 4.0 45.0% WOB = 30,000 lb 40.0% 35.0% 30.0% 25.0% WOB = 40,000 lb 20.0% 15.0% 1 3 10.0% 2 5.0% 0.0% 5.0 0.0 2 5.0 10.0 15.0 20.0 ROP, ft/hr Figure 11. Effect on ROP of improving the mechanical energy alone, and the effect of improving both the bit hydraulic-energy and the mechanical-energy on ROP. ROP, ft/hr 0 50 100 DSE, psi 150 3,000 3,500 3,500 4,000 Depth, ft 2,500 3,000 100,000 2,000 2,500 Depth, ft 2,000 0 4,000 4,500 4,500 5,000 5,000 5,500 5,500 6,000 6,000 Figure 12. ROP and DSE vs. Depth for field case No. 1: Bit balling. 200,000 300,000 SPE 116667 13 ROP, ft/hr 0 50 100 150 0 2,000 2,000 20 40 60 Torque, ft-lbs RPM, rpm WOB, Kips 80 50 2,000 100 150 200 0 2,000 5,000 HSI, hp/in 0.0 10,000 15,000 2,000 3,000 3,000 3,000 3,000 3,500 3,500 3,500 3,500 3,500 4,000 4,000 4,000 Depth, ft 2,500 Depth, ft 2,500 Depth, ft 2,500 Depth,...
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