Aluminum Alloy Pipe Design and Mechanical Property Analysis
Since the pipes of aluminum alloy have many advantages over traditional carbon steel pipes, the aluminum alloy pipes are gaining their shares in applications in petroleum development. Considering the complexity of the structure of deep and ultra-deep well, the laboratory experimental studies were conducted on the mechanical property, such as tensile strength, and elastic modulus of the steel pipe, aluminum pipe and titanium alloy pipe. A theoretical relationship between aluminum alloy pipe diameter, wall thickness, and tensile strength was established. For field study, a 7000 m deep well in Tarim oilfield was carried on the detailed design, and the results showed that the aluminum alloy pipe down to 7000 m had a safety factor of hook load greater than 1.94, and the safety coefficient of torque value was greater than 1.62. At the same time, the design requirements could be well met; when aluminum pipe was adopted to improve the design, the maximum tension of drill pipe was much bigger than that of a steel pipe’s maximum permissible stress as the steel pipe’s mechanical properties could not meet the requirement of drill pipe string design.
KeywordsDeep and ultra-deep well Aluminum alloy pipe Steel pipe Safety coefficient
The authors gratefully acknowledge the financial support from the postdoctoral research project and industrial breakthrough project (2015GY119) in Shaanxi province, and National key research and development plan (2016YFB0300904).
- 1.Lv. Shuanlu, L. Faqian, Z. Jie et al., Prospects of aluminum alloy drill pipe in Tarim oilfield. Petrol. Drill. Technol. 37(3), 74–77 (2009)Google Scholar
- 6.National standards of the People’s Republic of China. GB/T20659-2006/ISO15546-2002. Oil and gas industry aluminum alloy drill pipe (China Standards Press, Beijing, 2007)Google Scholar
- 8.M.Y. Gelfgat, V.S. Basovich, V.S. Tikhonov et al., Drillstring with aluminum alloy pipes design and practices. SPE79873 (2003)Google Scholar
- 9.R. Yu, P. Yuan, Aluminum drill pipe characteristics and potential applications. Oil Field Equip. 40(3), 81–85 (2011)Google Scholar
- 10.T. Wu, W. Xue, C. Lu, Superiorities of aluminum alloy drilling pipe and its application prospects in deep holes for geological exploration. Explor. Eng. 37(2), 27–29 (2010)Google Scholar
- 11.J. Tang, Q. Di, Y. Hu et al., Analysis on dynamic characteristics and wear mechanism of aluminum alloy drill pipe. Acta Petrolei Sin. 31(4), 684–688 (2010)Google Scholar
- 12.C. Feng, Domestic researched Aluminum alloy drilling pipe drilled in the Tarim oilfield for the first time. China Petroleum DailyGoogle Scholar
- 15.S. Yang, C. Feng, Aluminum alloy pipe design with the deep & ultra deep well, in International Conference on Oil Country Tubular Goods and Tubular String (2016)Google Scholar
- 16.V. Tikhonov, K. Valiullin, A. Nurgaleev et al., Dynamic model for stiff string torque and drag. SPE 163566 (2015)Google Scholar
- 17.C. Raap, A.D. Craig, R. Graham, Drill pipe dynamic measurements provide valuable insight into drill string dysfunctions. SPE 145910 (2011)Google Scholar