PROCESS OF MAKING A CASING IN A BORE HOLE
The invention relates to a process of making a casing in a bore hole which penetrates an underground formation. According to the invention, the process of making a casing in a bore hole ensures the continuity and the sealing of the casings in relation to the surrounding rock formations and consists in installing a liner in the bore hole, said liner being radially expandable and having a plurality of slot-shaped openings overlapping and extending in the longitudinal direction of the liner. Afterwards, a fluid sealing material is poured into the bore hole, where it hardens and fills said openings sealing them, and then, the liner is expanded radially using an expansion mandrel. The sealing material and the liner make up a casing made of steel reinforced cement. In an alternative embodiment, the openings in the liner are cut as a plurality of sections of reduced wall-thickness, said sections splitting during the expansion.