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a A Production Oil Company plans to run a 22,300-ft string of 47 lb/ft, P-110 grade, 7.625- in. production casing. The maximum expected burst pressure is 14,000 psi. A 17 lb/gal mud will be used in the well. The tension safety factor is 1.8. Use the following tables to select the appropriate couplings for this casing string and justify your answer. Coupling type LTC BTC Burst Rating psi 14,400 13,600 Joint Strength Ib 1,353,000 1,545,000

a A Production Oil Company plans to run a 22,300-ft string of 47 lb/ft, P-110 grade, 7.625- in. production casing. The maximum expected burst pressure is 14,000 psi. A 17 lb/gal mud will be used in the well. The tension safety factor is 1.8. Use the following tables to select the appropriate couplings for this casing string and justify your answer. Coupling type LTC BTC Burst Rating psi 14,400 13,600 Joint Strength Ib 1,353,000 1,545,000

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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a A Production Oil Company plans to run a 22,300-ft string of 47 Ib/ft, P-110 grade, 7.625- in. production casing. The maximum expected burst pressure is 14,000 psi. A 17 Ib/gal mud will be used in the well. The tension safety factor is 1.8. Use the following tables to select the appropriate couplings for this casing string and justify your answer. Burst Rating psi 14,400 Coupling type Joint Strength Ib LTC 1,353,000 BTC 13,600 1,545,000 b Discuss the qualitative changes of burst and collapse resistances when the casing string is become under tension or compression load. c Explain how casing design problems depend heavily on stress analysis techniques, rock mechanics and drilling and production conditions. d An exploration well is to be drilled to a total depth of 14,500 ft. Relevant data are as follows Drilling program 0-450 ft 450-5,000 ft Casing program 0-450 t 0-5,000 ft 12.25-in.hole 0- 10,100 t 10,100 - 14,500 n Mud program 0.465 psift 0- 450 ft 0.465 psit o-5,000 ft 0.465 psit o- 10,100 ft 0.580 psift 0- 14,500 ft 26-in. hole 20-in. casing 16-in. casing 18-in. hole 9.625-in. casing 7-in casing 5,000- 10,100 ft 10,100-14,500t Formation gradient 0-450 ft 340- 5,000 ft. 5,000- 10,100 t 10,100- 14,500 t 8.5-in. hole 8.7 ppg(651b/t 3) 9.5 ppg (70.7 bit3) 9.7 ppg (73 Ib/n 3) 11.5 ppg (85,6 Ib/ft 3) Size, outside diameter (in.) Nominal weight (Ibift) Grade Coupling type 94 133 J-55 К-55 K-55 N-80 L-80 LTC 20 BTC STC 40 43.5 58.4 9 5/8 BTC BTC BTC 58.4 P-110 The 12.25 inch hole experiences a maximum, dog-leg severity of 2"/100 ft, peak shock load velocity are to be included. Consider the following Safety factors: Burst = 1.1, Collapse = 0.85, Tension = 1.8 i Design suitable casing string for 20 inch casing L Design suitable casing string for 9 5/8 inch casing., taking into consideration the available casing grades (shown in the above table) and maximum expected pressures.
Transcribed Image Text:a A Production Oil Company plans to run a 22,300-ft string of 47 Ib/ft, P-110 grade, 7.625- in. production casing. The maximum expected burst pressure is 14,000 psi. A 17 Ib/gal mud will be used in the well. The tension safety factor is 1.8. Use the following tables to select the appropriate couplings for this casing string and justify your answer. Burst Rating psi 14,400 Coupling type Joint Strength Ib LTC 1,353,000 BTC 13,600 1,545,000 b Discuss the qualitative changes of burst and collapse resistances when the casing string is become under tension or compression load. c Explain how casing design problems depend heavily on stress analysis techniques, rock mechanics and drilling and production conditions. d An exploration well is to be drilled to a total depth of 14,500 ft. Relevant data are as follows Drilling program 0-450 ft 450-5,000 ft Casing program 0-450 t 0-5,000 ft 12.25-in.hole 0- 10,100 t 10,100 - 14,500 n Mud program 0.465 psift 0- 450 ft 0.465 psit o-5,000 ft 0.465 psit o- 10,100 ft 0.580 psift 0- 14,500 ft 26-in. hole 20-in. casing 16-in. casing 18-in. hole 9.625-in. casing 7-in casing 5,000- 10,100 ft 10,100-14,500t Formation gradient 0-450 ft 340- 5,000 ft. 5,000- 10,100 t 10,100- 14,500 t 8.5-in. hole 8.7 ppg(651b/t 3) 9.5 ppg (70.7 bit3) 9.7 ppg (73 Ib/n 3) 11.5 ppg (85,6 Ib/ft 3) Size, outside diameter (in.) Nominal weight (Ibift) Grade Coupling type 94 133 J-55 К-55 K-55 N-80 L-80 LTC 20 BTC STC 40 43.5 58.4 9 5/8 BTC BTC BTC 58.4 P-110 The 12.25 inch hole experiences a maximum, dog-leg severity of 2"/100 ft, peak shock load velocity are to be included. Consider the following Safety factors: Burst = 1.1, Collapse = 0.85, Tension = 1.8 i Design suitable casing string for 20 inch casing L Design suitable casing string for 9 5/8 inch casing., taking into consideration the available casing grades (shown in the above table) and maximum expected pressures.
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