Abstract:  Packers for high pressure injection into separate layers are developed to solve the packer failure at Shuanghe oilfield during water injection and acidizing jobs. Double-piston low pressure setting mechanism and well flushing valve controlled pins are adopted in this packer to realize setting before closing the flushing valve, ensuring a reliable packer setting. Double-layer brass bowl structure is used at the rubber shoulder for protection and rubber formula is ptimzed to improve its high temperature and high pressure performance. Experiments and tests show it can set reliably at rated setting pressures. Application in 12 wells prove the packer is effective over 2 years, meeting acidizing and fracturing needs, success ratio 100% , providing a technical support for high pressure water injection, acidizing and fracturing in different layers.

Key words:  , high pressure, separate layer, injection packer, reliable sealing, effective period

摘要：  为了解决双河油田分层注水、酸化封隔器工艺成功率较低的问题，研制了高压分层注入封隔器。该 封隔器采用双活塞低压力坐封机构、洗井阀控制销钉，实现先坐封、后关闭洗井阀，提高了封隔器坐封的可靠性；采 用双层紫铜碗胶筒肩部保护结构，同时与胶筒生产厂家联合攻关，优选胶筒配方，提高了胶筒耐温耐压性能。室内 试验和现场应用结果表明，高压分层注入封隔器在额定坐封压力下，能可靠坐封，从现场应用 １２口井情况看，注水 封隔器有效期达到两年以上，满足酸化、压裂施工现场需求，工艺成功率 １００％，取得了较好的应用效果，为高压分 层注水、分层酸化、分层压裂井的应用提供了技术支撑。

关键词:  高压, 分层, 注入封隔器, 密封, 有效期