Artificial Lift

Artificial lift involves the use of artificial means to increase the flow of liquids, such as crude oil or water, to the surface of a production well. Generally this is achieved by a mechanical device inside the well, such as a pump; decreasing the weight of the liquid/gas mixture via high pressure gas; or improving the lift efficiency of the well via velocity strings. Artificial lift is needed in wells when there is insufficient pressure in the reservoir to lift the liquid to the surface, but often used in naturally flowing wells (which don't technically need it) in order to increase the flow rate above what would flow naturally. The produced fluid can be oil and/or water, typically with some amount of gas included. The artificial lift provides additional energy to the system such that the fluids can be lifted to surface.
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人工升举

any method used to raise oil to the surface through a well, after reservoir pressure has declined to the point at which the well no longer produces by means of natural energy. Sucker-rod pumps, hydraulic pumps, submersible pumps, and gas lift are the most common methods of artificial lift.

elevação artificial

Any means of lifting liquid from a wellbore that has ceased to flow due to inadequate reservoir energy. These methods include rod pumps, electric submersible pumps (ESP), gaslift, plunger pumps, and hydraulic jet pumps.