Patent ID: 7635007

Claim:
A method of repairing a pipe containing a pressurized fluid featuring at least one leak, comprising: a) installation of a flexible and sealed casing bearing on the pipe on each side of the leak and enclosing same, said casing featuring a valve so that the fluid from the leak can escape, b) installation of a rigid and sealed casing bearing on the pipe on each side of said flexible casing and enclosing same, and c) injection of a polymerizable liquid inside said rigid casing, said flexible casing thus being enclosed inside a sleeve of polymeric resin following polymerization of the polymerizable material, wherein the leak is located in a flange, wherein the pressurized fluid is a gas, said valve being arranged at the highest point of said flexible casing so that the gas from the leak can escape, and wherein said rigid casing includes a hole located in line with said valve through which a guide tube designed to fit around said valve is introduced and whose function is to direct the gas outside said rigid casing.