Sleeve with insert for repairing high-pressure fluid pipes

A sleeve for repairing a fluid pipe having a defective area where there is a reduction in the thickness of the pipe, said sleeve consisting of

• a rigid or flexible shell adapted to act as a mold to encase at least said defective area and in which can be injected or infused a liquid-state polymerizable material that is adapted to seal the defective area when it polymerizes, and
• an insert made up of a plurality of turns of a thread-like element wound in a spiral around said pipe at the location of said defective area prior to the injection or infusion of said polymerizable material, wherein a pitch between two adjacent turns of said insert is constant and small with respect to the width of said insert and defines a space between adjacent turns of said insert such that said polymerizable material can coat said turns and adhere to the surface of the pipe wall,
• wherein said sleeve is adapted to form a hermetic seal enclosing all the turns of said thread-like element, and
• wherein each of the ends of said thread-like element is fixed to the adjacent turn by a clamp.

A process for repairing a fluid pipe with a defective area consisting of

• winding a thread-like element in a spiral around the pipe at the location of said defective area,
• surrounding the portion of the pipe where said defective area is situated by a hermetically closed rigid or flexible shell, said rigid or flexible shell being adapted to completely cover the turns of said thread-like element and
• injecting or infusing in said shell a polymerizable liquid material designed to form a resin after polymerization,
• wherein a pitch between two adjacent turns of said insert is constant and small with respect to the width of said insert and defines a space between adjacent turns of said insert such that said polymerizable material can coat said turns and adhere to the surface of the pipe wall.