초록

This application discloses a liner pipe reduction system comprising at least one pressurized die and at least one pressure cell. The pressurized dies and pressure cell are interconnected to form a reduction system to reduce the friction of liner pipe as it passes through one or more dies.

대표청구항 ▼

[ I claim:] [1.] A liner pipe reduction system comprising:a. a first die body having an entry to receive an elastomeric liner pipe to be temporarily reduced in diameter sufficiently to fit within a predetermined inside diameter of a host pipe and an exit to discharge the liner pipe after having it's

[ I claim:] [1.] A liner pipe reduction system comprising:a. a first die body having an entry to receive an elastomeric liner pipe to be temporarily reduced in diameter sufficiently to fit within a predetermined inside diameter of a host pipe and an exit to discharge the liner pipe after having it's diameter temporarily reduced, the die body defining an axially oriented frustoconical volume through which the liner pipe travels;b. a first substantially cylindrical pressure cell at the entry to the die body, the pressure cell arranged to exert fluid pressure on the outside surface of the liner pipe within and traveling through the pressure cell at a pressure less than the elastic limit of the liner pipe to permit the liner to expand to a diameter wherein it is in abutting contact with the inside diameter of the host pipe;c. a recessed area formed inside the first die body between the entry and the exit; andd. a first source of fluid pressure to pressurize the recessed area in the first die body with a fluid.