深水测试管柱螺纹连接密封性能分析  

Analysis on Threaded Connection Sealing Performance of Deepwater Test String

作　　者：孟文波 刘康[2] 孟祥瑜[2,3] 张崇 刘贤玉 陈国明 

机构地区：[1]中海石油(中国)有限公司湛江分公司 [2]中国石油大学(华东)海洋油气装备与安全技术研究中心 [3]中国石油大庆油田有限责任公司

出　　处：《石油机械》2016年第4期23-27,共5页China Petroleum Machinery

基　　金：中央高校基本科研业务费专项资金资助项目"深水测试管柱力学特性及安全可靠性研究"(14CX06119A);中海石油(中国)有限公司湛江分公司课题"LS17-2深水井测试管柱作业安全分析"(CCL2013ZJFN0733)

摘　　要：深水测试管柱的密封性能直接关乎测试过程的安全性和测试结果的可靠性。针对深水测试管柱多单根螺纹连接的密封问题,提出深水测试管柱密封弱点分析方法,结合深水环境下测试管柱密封性能的局部分析模型,建立经济有效的评估方案,并以我国南海某深水井为对象进行实例分析。分析结果表明,示例井测试管柱的螺纹连接满足不同测试工况的密封需求;深水测试管柱的密封弱点位置为悬挂器上部临近的螺纹连接处,深水测试管柱螺纹密封的接触压力峰区位于第1个相接触螺纹面的齿根处;随着测试产量的增加,测试管柱螺纹连接密封的安全性逐渐增加,弯曲载荷对测试管柱的密封性能影响较小,轴向力和内外压是影响深水测试管柱螺纹连接密封性能的关键因素。研究结果可为我国类似南海的深水测试管柱作业提供借鉴。Sealing performance of deepwater test string directly affects test process safety and test result reliability. In order to solve sealing prohlem of threaded connection for deepwater test strings, a sealing weakness analysis method is proposed for deepwater test strings. Based on partial analysis model of test string sealing performance under deepwater environment, an economically efficient assessment plan is set up and some deepwater well in South China Sea is taken as the object for case analysis. According to research results, threaded connection of test string for example wells can meet sealing requirements under different test conditions; sealing weakness position of deepwater test string is the threaded connection near the top of hanger and peak contact pressure of threaded sealing for deepwater test string is at the root of the first connected thread flank; threaded connection sealing safety of test string gradually rises with increase of test output, sealing performance of test string is less affected by the bending load, and the axial force and internal and external pressure are key factors affecting threaded connection sealing performance of deepwater test string. Research results can provide reference for similar deepwater test string operation in South China Sea.

关 键 词：深水测试管柱 弱点分析 螺纹连接 密封性能 接触分析 

分 类 号：TE951[石油与天然气工程—石油机械设备]