Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1990-04-17
1991-05-07
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
405154, F16L 100
Patent
active
050131885
ABSTRACT:
The process comprises excavating pits at the first and second ends of a buried section of old water main pipe that is to be replaced with new pipe. The exposed segments of pipe are broken up to provide access to the bore of the old pipe. A pipe splitter and a cylinder-actuated pulling unit are installed in the first pit. A string of rods is extended through the old pipe bore from the first pit to the second pit. A tool assembly of sequentially connected components is attached to the second end of the rod string. The tool assembly may comprise: means for centralizing the second end of the rod string in the second end of the old pipe section; a pull plate for bearing against the annular second end face of the old pipe section; a cylindrical plug for expanding the passageway extending between the pits; a rod member for extending through the bore of the new pipe section to be installed; and a second pull plate for bearing against the annular second end face of the new pipe. The new pipe section is mounted on the rod member and the string of rods is tripped to the first pit. In the course of tripping or retracting the rod string, the following actions simultaneously occur: the old pipe is advanced out of the passageway by pulling on it with the first pull plate; the old pipe is split longitudinally as it is advanced into the first pit; the diameter of the passageway is expanded by the plug; and the new pipe is pulled into the expanded passageway to replace the old pipe with the new pipe.
REFERENCES:
patent: 4507019 (1985-03-01), Thompson
patent: 4626134 (1986-12-01), Cuomont
patent: 4732222 (1988-03-01), Schmidt
patent: 4830539 (1989-05-01), Akesaka
patent: 4874268 (1989-10-01), Akesaka
patent: 4925344 (1990-05-01), Peres
Campbell David B.
Campbell Donald N.
Johnson E. P.
McBee J. Russell
Taylor Dennis L.
LandOfFree
Process for replacing a length of buried pipe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for replacing a length of buried pipe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for replacing a length of buried pipe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-935961