METHOD FOR REPAIRING CONCRETED PORTION OF UNDERWATER PIPELINE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC F16L55/175 F16L55/172 F16L1/26 

FIELD: construction.

SUBSTANCE: method for repairing a concreted portion of an underwater pipeline consists in applying a coupling to the damaged section of the pipeline and filling its cavity with a composite sealing polymerizable compound. In order to exclude the destruction of the concrete coating of the concreted pipeline pipe, a shroud made of a polymeric material in the form of a thin-walled pipe split along the generatrix or successively arranged pipes is applied on a damaged pipe portion. Said sealing polymerizable composition is applied on the inner shroud surface. Thereinafter, over the shroud, the couplings are placed, enveloping the bandage and pressing it against the concrete layer surface. Wherein the coupling halves of each coupling are tightened with bolts and nuts in the direction towards each other. Said couplings are arranged successively along the shroud length, with the butt of one coupling abutting against the butt of another coupling.

EFFECT: reducing the repair time, simplifying the design.

4 cl, 3 dwg