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通过优化封隔器的滑套尺寸、滑套喷砂体泄液面积、各级解封距、反洗通道等参数及采用双级胶筒密封设计，阐述了研制 ＱＨＹ３４１新型高压水力压缩式压裂封隔器的结构和原理。ＱＨＹ３４１封隔器采用了分体组合、双液缸、双胶筒密封、直连喷砂体的结构设计，具有结构简单、坐封方便、逐级解封载荷轻、反洗通畅、易解卡、耐压差大、一次压裂多层等优点。截至目前已现场实施６口井共９层的压裂，施工均获成功。
By optimizing the size of the packer sliding sleeve, the discharge area of the sand blasting body, the de-sealing distance at all levels, the backwashing channel, and the design of the double-stage rubber seal, the paper developed a new type of high-pressure hydraulic fracturing QHY341 Packer structure and principle. QHY341 packer adopts the split combination, double liquid cylinder, double rubber cylinder seal, straight sandblasting body structure design, has the advantages of simple structure, easy setting, gradual release of light load, smooth backwashing, easy solution card , Pressure drop, a multi-layer fracturing and so on. Up to now, a total of 9 layers of 6 wells have been fractured in the well and the construction has been successful.