Motorized crawler for gas main

Details Motorized crawler for gas main Motorized crawler for gas main

1979-08-14

1981-02-24

Footland, Lenard A.

Pipes and tubular conduits

Repairing

405158, F16L 5518

Patent

active

042521521

ABSTRACT:
An electrically powered pipeline crawler for use in conducting an insertion of a smaller-diameter, high-pressure gas main section into a section of lower-pressure, larger-diameter gas main. The pipeline crawler is sealed, so that it can be used to conduct insertion procedures in live gas main sections. Thus, service to customers along a main section upon which such an insertion is being conducted need not be interrupted. The pipeline crawler provides the added flexibility of permitting an insertion to be conducted on a several city block long section, without having to divide the several block long section into smaller sections of one to three blocks in length. Fewer access holes to the main need be dug, so there is less traffic disruption and the like.

REFERENCES:
patent: 3845789 (1974-11-01), Rohrer
patent: 3940855 (1976-03-01), Ver Nooy et al.
patent: 4026329 (1977-05-01), Thompson
patent: 4090534 (1978-05-01), Martin et al.

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