| 摘要 |
A gas-driven pumping device and a method for downhole pumping of a liquid from at least one liquid source in a well and onto at least one receiving region for the liquid. The pumping device comprises a pressure manipulation chamber having a lower chamber portion and an upper chamber portion, wherein the pressure manipulation chamber is connected in a flow-communicating manner to a liquid supply channel; a liquid discharge channel; a gas supply channel; and a gas discharge channel. By alternately lowering and increasing the gas pressure (Pchamber), liquid is pumped from the liquid source and onwards to the receiving region via the pressure manipulation chamber. |
