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2. Gas lift - Wikipedia

   en.wikipedia.org/wiki/Gas_lift

   The gas-lift mandrel is a device installed in the tubing string of a gas-lift well onto which or into which a gas-lift valve is fitted. There are two common types of mandrels. In a conventional gas-lift mandrel, a gas-lift valve is installed as the tubing is placed in the well. Thus, to replace or repair the valve, the tubing string must be pulled.

3. Stodola's cone law - Wikipedia

   en.wikipedia.org/wiki/Stodola's_cone_law

   For off-design calculations, the Stodola's cone law off-design flow rate is ˙, respectively, the temperature and pressure at the stage group intake are and and the outlet pressure is . Stodola established experimentally that the relationship between these three parameters as represented in the Cartesian coordinate system has the shape of a ...

4. Airlift pump - Wikipedia

   en.wikipedia.org/wiki/Airlift_pump

   The calculation of the volume flow of the liquid is ... Conventional airlift pumps have a flow rate that is very limited. ... Gas lift – Raising a fluid by ...

5. Pumpjack - Wikipedia

   en.wikipedia.org/wiki/Pumpjack

   A diagram of a pumpjack. A pumpjack is the overground drive for a reciprocating piston pump in an oil well. [1]It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface.

6. Artificial lift - Wikipedia

   en.wikipedia.org/wiki/Artificial_lift

   Artificial lift is the use of artificial means to increase the flow of liquids, such as crude oil or water, from a production well. Generally this is achieved by the use of a mechanical device inside the well (known as pump or velocity string) or by decreasing the weight of the hydrostatic column by injecting gas into the liquid some distance down the well.

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9. Lifting gas - Wikipedia

   en.wikipedia.org/wiki/Lifting_gas

   This calculation is at sea level at 0 °C. For higher altitudes, or higher temperatures, the amount of lift will decrease proportionally to the air density, but the ratio of the lifting capability of hydrogen to that of helium will remain the same. This calculation does not include the mass of the envelope need to hold the lifting gas.