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氢化丁腈橡胶是适用于高温高压深井条件的密封制品,但由于氢化丁腈分子链上的少量不饱和键在高温下极易发生热氧老化而失去密封性,与橡胶胶筒配套的井下工具封隔器不能在井下长期有效工作。本文从提高橡胶分子主链的饱和度着手,采用单官能度的不饱和羧酸盐—氢氧化单甲基丙烯酸锌对橡胶基体进行改性增强研究,来提高复合橡胶材料的高温力学性能。同时,通过建模、加载、计算分析,对橡胶胶筒结构进行了组合式设计优化,提高了复合橡胶材料的耐压性能。并通过在现场应用耐高温高压复合橡胶长效密封技术,验证了复合橡胶密封件达到了耐温≥170℃、压差≥35 MPa、有效期≥1年的技术指标要求,实现了深层油气藏的高效精细开发。
Hydrogenated nitrile rubber is suitable for high temperature and pressure conditions of deep well sealed products, but due to hydrogenated nitrile molecular chain of a small amount of unsaturated bonds prone to thermal aging at high temperatures and loss of sealing, downhole tools and rubber collet supporting tools Packer can not effectively work underground for a long time. In this paper, starting from improving the saturation of the main chain of rubber molecules, the rubber matrix was modified by the monofunctional unsaturated carboxylic acid salt of zinc monomethacrylate to improve the mechanical properties of the composite rubber. At the same time, through the modeling, loading and calculation analysis, the rubber cylinder structure is optimized by the combined design, which improves the pressure resistance of the composite rubber material. Through the application of long-term high-temperature and high-pressure rubber sealing technology in the field, the composite rubber seal has been verified to meet the technical requirements of temperature resistance ≥170 ℃, pressure differential pressure ≥35 MPa and effective period ≥1 year, Efficient and sophisticated development.