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工程研究股份有限公司中心（现名C-FER技术股份有限公司）、新示范工程有限公司和39个以上石油开采商和供应商联合的集团公司，花了6年时间研制和试验了一种井下注水分离（DHOWS）工艺，它由水力旋流器和普通抽油设备组成。截止1996年底、采从电潜泵（ESP）、螺杆泵（PCP）和有杆泵系统，在各种条件下，共完成18次以上矿场试验。在最初的电潜泵样机应用中；产水量下降程度达到97％；一般排到地面液体的水油比可以降低到2或2以下。本文简要总结了完成的矿场试验和取得的关键性成果；包括产油量增加，产水量下降、预测的储量采收率增加和影响井下油分分离系统实施的一般因素。本文对已经解决的问题，连同该接术今后潜任的应用和挑战一起进行了讨论。可以预测，在水管理方面，井下油水分离技术的应用，将很快改变工业上与此有关方面的现状。
Engineering Research Center Co., Ltd. (now known as C-FER Technology Co., Ltd.), New Demonstration Engineering Co., Ltd. and more than 39 oil extraction companies and suppliers in a joint group company, spent 6 years to develop and test a well Water separation (DHOWS) process, which consists of a hydrocyclone and a common pumping unit. By the end of 1996, a total of 18 mine tests were completed under various conditions from ESP, PCP and rod pump systems. In the initial application of ESP prototypes, the water yield was reduced by 97%. The water-oil ratio generally dropped to below 2 or below 2 for liquids discharged to the surface. This paper briefly summarizes the completed field tests and key deliverables; including increases in oil production, decreases in water production, predicted increases in oil recovery, and general factors that affect the implementation of downhole oil separation systems. This article discusses the issues that have been solved, together with the applications and challenges of the future potential of the solution. It can be predicted that in the aspect of water management, the application of downhole oil-water separation technology will soon change the status quo in the industry related to this.