中国石油网消息：9月26日获悉，大庆油田“井下油水分离注采开发技术”实现关键工艺迭代，升级后的2.0版井下配套工艺管柱，完成首次现场应用，系统运行状态平稳、各项参数稳定达标。

China Oil News: On September 26th, it was learned that the "downhole oil-water separation injection-production development technology" of Daqing Oilfield has achieved a key process iteration. The upgraded 2.0 version of the downhole supporting process tubing column has completed its first on-site application, and the system is operating stably with all parameters meeting the standards.

“井下油水分离注采开发技术”就是在同一井筒内，一边开采原油，一边把分离出来的水直接就地回注地层，井下要同时设置由抽油杆驱动的采油、注水两套设备。

"The underground oil-water separation injection-production development technology" involves extracting crude oil from the same wellbore while simultaneously injecting the separated water back into the formation on-site. In the wellbore, two sets of equipment, driven by sucker rods, are required to be installed for oil extraction and water injection respectively.

1.0版管柱施工时，依靠下压油管，借助油管锚使封隔器完成坐封，实现各油层的有效分隔。但这套模式存在一些问题：作业后井下管柱发生弯曲，诱发杆管偏磨，缩短管柱使用寿命，需要配合管、杆扶正系统降低影响；随着封隔器级数增加，所需的下压力会增大，易引发管柱失稳，仅能实现3层段以内分注。

In the 1.0 version of the casing construction, the tubing is pressed down to achieve the seating of the packer, thereby effectively separating the various oil layers. However, this system has some drawbacks: after the operation, the downhole casing column will bend, causing rod-tubing eccentric wear, shortening the service life of the casing column, and requiring the cooperation of a pipe and rod alignment system to reduce the impact; as the number of packers increases, the required down pressure will increase, which is prone to cause the casing column to become unstable, and can only achieve separate injection within 3 layers.

为此，技术团队提出“井筒内自主建压坐封、压力通道受控开启”技术思路，攻克套管内部空间有限带来的结构排布难题，创新形成新型桥式封隔器配套坐封工艺。

To address this, the technical team proposed the technical concept of "autonomous pressure establishment and sealing within the wellbore, and controlled opening of the pressure channel". They overcame the structural arrangement challenges caused by the limited space inside the casing, and innovatively developed a new type of bridge-type packer and its accompanying sealing process.

2.0版核心管柱，能够有效延长井下工具的服役周期，降低偏磨造成的检泵作业频次。同时，可规避多封隔器联作工况下的管柱失稳风险，具备支撑3层及以上油层分层注采的技术基础。

The core tubing of version 2.0 can effectively extend the service life of downhole tools and reduce the frequency of pump inspection operations caused by eccentric wear. At the same time, it can avoid the risk of tubing instability in multi-sealoration working conditions and has the technical foundation to support multi-layer oil layer stratified injection and production.