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Casing Wear Prediction with Considering Initial Internal Casing Eccentricity

摘要:Casing components in drilling engineering possess problematic internal eccentricity due to mismachining and circumferential wear in the prophase. Said eccentricity markedly affects the accuracy of casing wear prediction. In this study, casing wear efficiency theory and a novel geometric description are used to establish a wear prediction model for the initial internal casing eccentricity in extended reach drilling (ERD). Composite casing wear analysis is conducted to explore wear in the same groove and across a series of different grooves; then, residual depth (RD) is used to evaluate wear in terms of risk. The model parameters are subjected to sensitivity analysis, and a case study is conducted to validate the model. The results show that slight eccentricity significantly affects the accuracy of casing wear prediction and that worn casing depth increases as drilling footage increases in a manner strongly dependent on composite wear. The RD percentage of the worn casing wall markedly decreased as initial internal casing eccentricity increased, particularly at the most dangerous angle; at footage of 6000 m, the RD of worn casing wall by drill string A and C combination was minimal. Initial internal casing eccentricity should be properly accounted for in ERD processes to ensure drilling safety.

关键字:Casing wear Initial internal eccentricity Residual depth (RD) Composite casing wear Risk analysis

ISSN号:2193-567X

卷、期、页:卷: 43 期: 5 页: 2593-2603

发表日期:2018-05-01

期刊分区(SCI为中科院分区):四区

收录情况:SCIE(科学引文索引网络版),ESI(基本科学指标数据库)

发表期刊名称:ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING

通讯作者:谭雷川

第一作者:高德利,周劲辉

论文类型:期刊论文

论文概要:谭雷川,高德利,周劲辉,Casing Wear Prediction with Considering Initial Internal Casing Eccentricity,ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING,2018,卷: 43 期: 5 页: 2593-2603

论文题目:Casing Wear Prediction with Considering Initial Internal Casing Eccentricity

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