焊管2026，Vol.49Issue(5)：55-61,7.DOI:10.19291/j.cnki.1001-3938.2026.05.008
Φ244.5mm×11.99mm BJC-Ⅱ型气密封特殊螺纹开发
Development of Φ244.5 mm×11.99 mm BJC-Ⅱ Gas-tight Premium Threaded Connection
摘要
Abstract
In order to meet the need of unconventional oil and gas deep wells and ultra-deep wells for the gas-tight performance of large-medium diameter string,Φ244.5 mm×11.99 mm BJC-Ⅱ gas-tight premium threaded connection casing was successfully developed with designs such as negative angle bearing surface threads,metal sealing structures,and negative angle torque shoulders.The sealing performance was analyzed using a combination of finite element and physical testing methods.Results show that the joint has excellent sealing surface contact under all loads,and the overall stress distribution is reasonable through finite element analysis.Physical evaluation tests confirmed that the Φ244.5 mm×11.99 mm BJC-Ⅱpremium threaded connection successfully passed the make-up and break-out,combined load,and ultimate failure load tests,fully meeting design requirements.The developed Φ244.5 mm×11.99 mm premium threaded connection demonstrates superior anti-sticking performance,sealing integrity,and load-bearing capacity,satisfying the sealing design requirements for complex working conditions.It provides valuable reference for the development of large-medium diameter premium thread casings.关键词
中大直径/气密封特殊螺纹接头/结构设计/有限元分析Key words
medium and large size/gas-tight premium threaded connection/structural design/finite element analysis分类
能源科技引用本文复制引用
李兴华,杨晓龙,孙孟珂,唐家睿,苑清英,樊洪,李旭阳,陈浩明..Φ244.5mm×11.99mm BJC-Ⅱ型气密封特殊螺纹开发[J].焊管,2026,49(5):55-61,7.基金项目
陕西省重点研发计划"基于页岩气井套损机理研究的超高强度气密封特殊螺纹套管研制与应用"(项目编号2025QY-GJHX-09). （项目编号2025QY-GJHX-09）
