Capillary series, as high-pressure series of small diameter tubes, can be installed in the wellbore and used to express different fluids and/or gases. In the case of using capillary tubes as a permanent solution for liquid in wellbores, foam is injected which reduces the surface tension at the boundary of the gas-water phase by creating a foam that has a lower pressure gradient than the water, thereby enabling the remaining water from the wellbore to be extracted. The gas wellbore with an inflow of water greater than the wellbore produces will, over time, face reduced productivity and ultimately cease production, and without resolving this issue, the wellbore can no longer be operational.
