| 摘要 |
The invention concerns a method for pumping a fluid, for instance an oil effluent derived from a source (14) adjacent to a well (10), towards an outlet (24), the well comprising a chamber (32) extending substantially over the whole length of the well, and a pipe column (18) passing through the chamber and communicating with it at one end, and, at an intermediate point on its length with the source (14).The invention is characterised in that it comprises the following steps: filling, up to a predetermined height, the lower end of the chamber and of the pipe column with a first liquid with a density higher than that of the effluent; filling the chamber, between the predetermined height and the outlet, with a second liquid with a density lower than that of the first liquid, and injecting an additional amount of the second liquid in the chamber so as to displace the first liquid and the effluent, in order to bring the effluent up towards the outlet. The invention also concerns a pumping installation.
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