Collapsing Pressure of Casing Located at the Bend Part of Casing-Exit Sidetracking Well

Abstract:

Depending on the mechanical characteristics of casing located at the bending part of sidetrack horizontal well, the calculation model of casing collapsing strength under the effect of bending load is established, and corresponding theoretical formulae is derived. During the process of deducing formulas, the influence of bending load on the casing section out of roundness is ignored, which made the calculation formula benefits intuition and practicality comparing to the T.Tamano formula. The result of this paper is verified through the simulation value and laboratory test of casing used in the Jilin oilfield. It shows that the formula of this paper can meet the engineering commands; the axial load is significant to affect casing collapsing strength, and in the actual production process should be strictly controlled.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 1884-1890
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.1884
• Online since: November 2011
• Authors: Zhong Lan Tian, Heng Lin Yang, Xiang Zhen Yan, Zhi Qian Xu
• Keywords: Axial Load, Bending Load, Collapsing Strength, Laboratory Test, Short Radius Horizontal Wells

References

[1] Yan Xiangzhen, Permitted build-up rate of completion strings in multi-branch CBM well, Journal of China Coal Society, vol. 35, pp.787-791, May (2010).

[2] Shan Chaodong, Run Xuefeng and Yang Xizhu, Study of Tubing String Mechnical Analysis in Extended-reach horizontal Well Completion, Oil Field Equipment, vol. 37, pp.20-24, February (2008).

[3] Tamano T, Mimake T and Yanagimoto S, A. New empirical formula for collapse resistance of commerdal easing, Journal of Energy Resources Technology, vol. 43, pp.117-121, May (1983).

[4] Zuang Baotang, Li Qian and Deng Chuanguang, Force Analysis of Casing in the Curved Portion of Medium/Short Radius Horizontal Wells, Drilling&Production Technology, vol. 29 pp.80-81, May (2006).

[5] Payne and Michael L, Improving Operational Procedures Can Reduce Fatigue Failure in 8-Rd Casing, J. Oil and Gas, Vol. 92, Issue. 48, p.7, March (1994).

[6] Matthews C., Assessing Tubular Connection Leakage Integrity, World Oil, Vol. 32, pp.82-84, February (2002).

[7] Yang Jie and Peng Jianshe, Mechanical model and analysis of casing bucking in horizontal wells, , China Petroleum Machinery, vol. 24, pp.43-46, December (1996).

[8] Rahman SS, and Chilingarian GV, Casing Design Theory and Practice, Amsterdam, Netherlands: Elsevier Science B, vol. 28 pp.51-71, Decembe (1995).

[9] Wang Jianjun, Zhang Shaohuai and Di Qinfeng; Investigation on bend strength and bend limitation corner of casings", Journal of Xi, an Petroleum institute, vol. 9, pp.24-26, January (1997).

[10] Paul R, Garvey P R, and Lansdowne Z F, Risk Matrix: An Approach for Identifying, Assessing, and Ranking Program Risks, Air Force Journal of Logistics, Vol. 25, pp.16-19, April (1998).

[11] Claude Lamboray, A Comparison Between the Prudent Order and the Ranking Obtained with Borda's, Copeland's, Slater's and Kemeny's Rules, Mathematical Social Sciences, Vol. 54, pp.1-16, July (2007).

DOI: 10.1016/j.mathsocsci.2007.04.004

[12] Lansdowne Z F, and Woodward B S, Applying the Borda Method, Air Force Journal of Logistics, Vol. 20, pp.27-29, October (1996).

[13] Zhang Haoran, Han Zhengzhi, and Li Changgang, Support Vector Machine Based Nonlinear Model Predictive Control, Systems Engineering and Electronics, Vol. 25, pp.330-334, March (2003).

[14] E. El-Sebakhy, T. Sheltami, and S. Al-Bokhitan Support Vector Machines Framework for Predicting the PVT Properties of Crude-Oil Systems, SPE Middle East Oil and Gas Show and Conference, Kingdom of Bahrain, pp.11-14, March, (2007).

DOI: 10.2118/105698-ms