针对目前油水井作业中使用的底部割缝滑套+压差式封隔器组合工艺管柱存在的问题,研制了双级高效坐封连通器。该连通器由上接头、割缝钢球、密封圈、销钉、割缝滑套、连接套、坐封钢球、坐封滑套、调节弹簧和下接头等组成。双级高效坐封连通器+压差式封隔器组合成工艺管柱,不但可以保证压差式封隔器充分坐封,而且在1·5~3·0MPa低压下即可连通作业层段,现场推广应用取得了良好的效果。 Aiming at the problems existing in the combination of the bottom slotted sleeve and the pressure differential packer used in the current operation of oil and water wells, a two-stage efficient set-back communication device was developed. The connector is composed of an upper joint, a slotted steel ball, a sealing ring, a pin, a slotted sliding sleeve, a connecting sleeve, a setting ball, a seat sleeve, an adjusting spring and a lower connector. Two-stage efficient setter + differential pressure packer packer into the process of column, not only to ensure that the pressure packer full set, but also in 1.5 ~ 3 · 0MPa low pressure to connect the operation interval , On-site promotion and application achieved good results.