Pipe laying system and method

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement

Patent

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Details

4051501, 405154, 138 97, 175 61, 175171, 175323, 175394, F16L 100

Patent

active

054529670

ABSTRACT:
A system for simultaneously lining and cleaning an existing sewer pipe, and for laying horizontal pipe without digging a trench, includes a planetary gear assembly mounted on a drilling rig. A liner pipe or outer pipe which is to be laid underground is placed over an inner auger, with the forward end of the liner pipe located behind the auger drill bit. The opposite end of the auger is attached to the sun gear of the planetary gear assembly; and the outer pipe is secured to the ring gear of the assembly. The auger is rotated in one direction, causing the outer pipe to rotate in the other direction; and the pipe and auger are pushed simultaneously through the pipe to be lined or through the soil. Once a section of auger and liner pipe have been pushed in place, the planetary gear assembly is disconnected from the auger and the liner pipe, new sections of auger and liner pipe are connected to the existing sections at one end, and to the planetary gear assembly at the other end. The process is repeated until the desired length of pipe is inserted into the ground. After completion of insertion of the pipe, the pipe is disconnected from the planetary gear assembly and the auger is withdrawn through the pipe for use with a subsequent installation.

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