焊管2025，Vol.48Issue(6)：74-79,6.DOI:10.19291/j.cnki.1001-3938.2025.06.010
深层页岩气用140V超高强度特殊螺纹套管开发
Development of 140V Ultra-high Strength Premium Connection Casing for Deep Shale Gas
摘要
Abstract
140V grade BJC-Ⅱ premium connection casing with specifications of Φ139.7 mm×12.7 mm was developed to meet the demand for ultra-high strength and high toughness casing for developing domestic unconventional oil and gas resources,such as deep shale gas.This study analyzed the strength and toughness,microstructure,geometric dimensions,collapse resistance performance,and sealing performance of the premium connection for casing.The results demonstrated that the developed 140V grade ultra-high strength casing has a yield strength Rt0.7≥1 000 MPa,tensile strength Rm≥1 100 MPa,elongation δ≥26%,transverse impact energy≥112 J at 0℃,and depreciation rates for average yield strength≤7.5%.These properties indicate excellent strength-toughness matching and high temperature performance that fulfill the requirements specified in GB/T 43231-2023 standard for 140V casing.It has excellent geometric dimensional accuracy and collapse resistance performance that is 17%higher than the calculated value according to API TR 5C3 standard.The premium connection for full-scale casings exhibits excellent gas tightness performance under simulated cyclic fracturing at an internal pressure of 140 MPa and ultimate load strength to meet service environment requirements for developing deep shale gas.关键词
140V钢级套管/超高强度/强韧性/气密封/螺纹接头Key words
140V steel grade casing/ultra-high strength/strength-toughness/gas tightness/premium connection分类
石油、天然气工程引用本文复制引用
黄德全,何石磊,陈浩明,李远征,杨晓龙,唐家睿..深层页岩气用140V超高强度特殊螺纹套管开发[J].焊管,2025,48(6):74-79,6.基金项目
中国石油天然气集团有限公司科学研究与技术开发项目"提高页岩气井抗套损能力的新型套管研发"(项目编号2020B-4020). （项目编号2020B-4020）
