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The Scientific World Journal
Volume 2013, Article ID 565891, 9 pages
http://dx.doi.org/10.1155/2013/565891
Research Article

Analyzing Axial Stress and Deformation of Tubular for Steam Injection Process in Deviated Wells Based on the Varied Fields

1Uncertainty Decision-Making Laboratory, Sichuan University, Chengdu 610064, China
2College of Economics & Management, Sichuan Agricultural University, Chengdu 611130, China
3Research School of Engineering Technology, The Southwest Petroleum and Gas Corp, China Petroleum and Chemical Corp, Deyang 618000, China

Received 13 May 2013; Accepted 2 August 2013

Academic Editors: G. Carbone, S. Park, S. Torii, and Q. Yang

Copyright © 2013 Yunqiang Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The axial stress and deformation of high temperature high pressure deviated gas wells are studied. A new model is multiple nonlinear equation systems by comprehensive consideration of axial load of tubular string, internal and external fluid pressure, normal pressure between the tubular and well wall, and friction and viscous friction of fluid flowing. The varied temperature and pressure fields were researched by the coupled differential equations concerning mass, momentum, and energy equations instead of traditional methods. The axial load, the normal pressure, the friction, and four deformation lengths of tubular string are got ten by means of the dimensionless iterative interpolation algorithm. The basic data of the X Well, 1300 meters deep, are used for case history calculations. The results and some useful conclusions can provide technical reliability in the process of designing well testing in oil or gas wells.