Trenchless pipeline installation method and apparatus employing

Details Trenchless pipeline installation method and apparatus employing Trenchless pipeline installation method and apparatus employing

1994-02-22

1995-06-27

Corbin, David H.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Repair, replacement, or improvement

175 53, 175 62, 405154, F16L 1028

Patent

active

054274753

ABSTRACT:
A corrective trenchless pipeline installation method basically includes the operational steps of, first, forming a substantially irregular initial pilot hole underground in earthen matter between a pair of spaced entry and exit pits formed in the earthen matter, second, reforming the substantially irregular initial pilot hole into a substantially straight corrected pilot hole, third, reaming the corrected pilot hole to provide an expanded straight pilot hole, and, fourth, pulling a pipeline through the expanded corrected pilot hole. In reforming the irregular initial pilot hole to the straight corrected pilot hole a cutter blade is concurrently reciprocated back and forth through the irregular pilot hole and rotated relative to the irregular pilot hole to form the corrected straight pilot hole therefrom.

REFERENCES:
patent: 2796129 (1957-06-01), Brandon
patent: 3180687 (1965-04-01), Horton
patent: 3452545 (1969-07-01), Malloy
patent: 3482641 (1969-12-01), Atkins et al.
patent: 3905431 (1975-09-01), Hasewend
patent: 4043136 (1977-08-01), Cherrington
patent: 4422800 (1983-12-01), Parish
patent: 4442896 (1984-04-01), Reale et al.
patent: 4943189 (1990-07-01), Verstreten
"Trenchless Pipeline Replacement Methods With The TRS Hydrahaul System"-4 pages.

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