Research on the Analysis of Coiled Tubing Fatigue Life-Reference-Cited by-同舟云学术

Research on the Analysis of Coiled Tubing Fatigue Life

Published:2011-07 Issue: Volume:66-68 Page:1173-1178
ISSN:1662-7482
Container-title:Applied Mechanics and Materials
language:
Short-container-title:AMM

Author:

Ji Ya Feng¹,Zhang Hong¹,Duan Qing Quan¹,Cao Yan Bin¹

Affiliation:

1. China University of Petroleum

Abstract

Coiled tubing (CT) and coiled tubing units (CTU) technology has been widely used in oil and gas field since World War II. Coiled tubing fatigue failure is one of the constraints on promoting used. CT bears complex loads, leading to multiple plastic deformations when operating. Then the fatigue damage cannot be ignored. Through the mechanics analysis of CT with finite element method (FEM) in working state at the wellhead, the results show that high stress and high strain are the main factors which cause CT failure. Based on the analysis, the fatigue life is predicted for CT without defects by using Manson-Coffin formula. The results of CT with different inner pressure show that simulations result is closer to the actual working conditions.

Publisher

Trans Tech Publications, Ltd.

Link

https://www.scientific.net/AMM.66-68.1173.pdf

Reference4 articles.

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2. Tomas Padron: Fatigue Life of Coiled Tubing With External Mechanical Damage. SPE107113, (2007).

3. Yang, G and Luo, G: Mechanics Research of Bending Coiled Tubing. Oil Field Equipment. Vol39(5), 2010, pp.10-13.

4. Bi, Z.Y., Xian, L.Y. and Jing, X. T: Low Cycle Fatigue Property and Life of Coiled Tubing under Large Deformation. Proceedings of the 3rd World Conference on Safety of Oil and Gas Industry. Beijing: Petroleum Industry Press, (2010).

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