| 摘要 |
The present invention relates to a gas lift system arranged in a well having a top and comprising a well fluid, the gas lift system comprising a casing arranged in the borehole defining a surrounding annulus, an opening in the casing, and a pumping unit for pumping gas into the annulus, wherein the gas lift system further comprises a downhole tool having a first end nearest the top of the well and a second end, the downhole tool comprising a pump section comprising a housing comprising a chamber having an axial extension, a plunger sliding in the chamber and dividing the chamber into a first compartment and a second compartment, a plunger rod connected with the plunger, a chamber inlet channel and a chamber outlet channel, the inlet channel and the outlet channel being in fluid communication with the second compartment, a sealing element for isolating a first part of the casing from a second part of the casing, the first part and the inlet channel being in fluid communication with the opening, a one-way valve arranged in the inlet channel to allow fluid to flow into the chamber, and a one-way valve arranged in the outlet channel to allow fluid to flow out of the chamber. The invention also relates to a gas lift method. |
