A New Crescent Shaped Wear Equation for Calculating Collapse Strength of Worn Casing Under Uniform LoadingSource: Journal of Pressure Vessel Technology:;2015:;volume( 137 ):;issue: 003::page 31201Author:Lin, Yuanhua
,
Deng, Kuanhai
,
Qi, Xing
,
Liu, Wanying
,
Zeng, Dezhi
,
Zhu, Hongjun
,
Zhu, Dajiang
DOI: 10.1115/1.4029588Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: During the practice of oil and gas drilling and exploration, the casing wear became more and more serious and well known. A crescentshaped wear pattern is the major wear type and leads to decrease of casing collapse strength. It is obvious that the casing design and safety assessment must take casing wear into account. However, existing empirical equations generally neglect the effect of manufacturing defects on collapse strength, which leads to a large error between calculated results and experimental data. To address the need, the wear mechanism is studied in this paper, and the effects of both wear and manufacturing defects on the collapse strength are considered. Based on this study, a new equation for calculating the collapse strength of a casing with crescentshaped wear is presented. Comparison with experiment and alternate assessment methods shows that the new equation is much better than other methods and its calculated results are much closer to the experimental data. The new equation was used for the casing design of ultradeep wells, especially in the north–west part of China.
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contributor author | Lin, Yuanhua | |
contributor author | Deng, Kuanhai | |
contributor author | Qi, Xing | |
contributor author | Liu, Wanying | |
contributor author | Zeng, Dezhi | |
contributor author | Zhu, Hongjun | |
contributor author | Zhu, Dajiang | |
date accessioned | 2017-05-09T01:23:05Z | |
date available | 2017-05-09T01:23:05Z | |
date issued | 2015 | |
identifier issn | 0094-9930 | |
identifier other | pvt_137_03_031201.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/159474 | |
description abstract | During the practice of oil and gas drilling and exploration, the casing wear became more and more serious and well known. A crescentshaped wear pattern is the major wear type and leads to decrease of casing collapse strength. It is obvious that the casing design and safety assessment must take casing wear into account. However, existing empirical equations generally neglect the effect of manufacturing defects on collapse strength, which leads to a large error between calculated results and experimental data. To address the need, the wear mechanism is studied in this paper, and the effects of both wear and manufacturing defects on the collapse strength are considered. Based on this study, a new equation for calculating the collapse strength of a casing with crescentshaped wear is presented. Comparison with experiment and alternate assessment methods shows that the new equation is much better than other methods and its calculated results are much closer to the experimental data. The new equation was used for the casing design of ultradeep wells, especially in the north–west part of China. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | A New Crescent Shaped Wear Equation for Calculating Collapse Strength of Worn Casing Under Uniform Loading | |
type | Journal Paper | |
journal volume | 137 | |
journal issue | 3 | |
journal title | Journal of Pressure Vessel Technology | |
identifier doi | 10.1115/1.4029588 | |
journal fristpage | 31201 | |
journal lastpage | 31201 | |
identifier eissn | 1528-8978 | |
tree | Journal of Pressure Vessel Technology:;2015:;volume( 137 ):;issue: 003 | |
contenttype | Fulltext |