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Thermal and Stress-Loading Analysis for Tubulars in HP-HT Wells

This paper provides an overview of an engineering-design methodology that can be followed for tubular-equipment sizing and selection for use in complex wells. A typical list of reservoir and well parameters required to set up the well model for thermal and stress-loading analysis is presented. Furthermore, a full well-casing and tubing-design-integrity analysis is performed on a complex, high-rate, high-pressure/high-temperature (HP/HT) example well with various anticipated operating loads.

Introduction

The purpose of tubular-design analysis and validation is to analyze tubing loads, design integrity, and buckling behavior under complex mechanical- and thermal-loading conditions, as well as fluid pressure effects. It is very important to perform thermal and pressure analysis for a well and then to use estimated temperature and pressure profiles in a tubular-stress analysis in well-completion designs. This is true for any well completion and is especially important in HP/HT wells, deepwater wells, and subsea wells (with emphasis on recognition of annulus fluid expansion). Thermal and stress analysis helps to estimate whether the proposed or existing completion for the well is fit for purpose when subjected to varying well-operating conditions during the life of the well. Therefore, for a proper completion design, it is critical that this analysis be performed while the completion is still in the planning stage.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 24852, “Importance of Thermal/Stress-Loading Analysis for Tubulars in HP/HT Wells,” by Norman Shahreyar, SPE, and Douglas Finley, SPE, Halliburton, prepared for the 2014 Offshore Technology Conference Asia, Kuala Lumpur, 25–28 March. The paper has not been peer reviewed. Copyright 2014 Offshore Technology Conference. Reproduced by permission.
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Thermal and Stress-Loading Analysis for Tubulars in HP-HT Wells

01 June 2014

Volume: 66 | Issue: 6

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