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新工艺、新技术的进步大大改变了油田开发模式，一口油井没有必要确定专门用来采油或注水，在多功能井中，采油和注水可同时进行。这种技术把水留在地下，从而减少了地面水处理量。油、气、水在井筒中按重力不同分层存在，本文讨论的技术──双功能泵系统（DAPS）可在井筒中维持油、气、水的这种状态，使采油和注水在一口井中同时进行，并产生了巨大的经济效益和社会效益。本文讨论以下几方面：①Rocky Mountain油田利用井下油水重力分离原理设计并试验了井下油水分离人工举升系统；②程序模拟过程；③提高环境保护水平；④推广应用新技术存在的困难；⑤应用前景。
The progress of new technology and new technology has greatly changed the oilfield development model. It is not necessary for an oil well to be specifically used for oil production or water injection. In multi-purpose wells, oil recovery and water injection can be carried out at the same time. This technique leaves water in the ground, reducing surface water handling. Oil, gas and water exist in different layers in the wellbore according to gravity. The technology discussed in this paper, DAPS, can maintain this state of oil, gas and water in the wellbore so that oil production and water injection can take place in a well At the same time, and produced a huge economic and social benefits. This article discusses the following aspects: (1) Rocky Mountain oil field uses underground oil-water gravity separation principle to design and test the downhole oil-water separation artificial lift system; (2) process simulation; (3) to improve the environmental protection level; (4) to promote the application of new technologies; (5) .