Apparatus for transferring line travel device from one pipeline

Pipes and tubular conduits – With closures and plugs – Inflation stem type

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Details

138 98, 118DIG11, F16L 5518

Patent

active

052656470

ABSTRACT:
A plug (10) is disclosed which is clamped to the end of a first pipeline section (14) being worked on by a line travel device (12). The line travel device (12) can completely perform its operation on the first pipeline section and move on to the plug. The plug is then unclamped from the first pipeline section and the plug and line travel device are moved together to the second pipeline section (16) to be worked on. The plug is clamped to the second pipeline section (16) to be worked on and the line travel device moves off the plug onto the second pipeline section to perform its operation on the entire length of the section.

REFERENCES:
patent: 172528 (1876-01-01), Walker
patent: 1344914 (1920-06-01), Louden
patent: 2068765 (1937-01-01), Quinlan
patent: 2401453 (1946-06-01), Bell et al.
patent: 2746516 (1956-05-01), Cummings
patent: 3183939 (1965-05-01), Immel
patent: 3606408 (1971-09-01), Wagner
patent: 4253497 (1981-03-01), Martin et al.
patent: 4504171 (1985-03-01), Florence, Jr.
patent: 4953496 (1990-09-01), Taylor et al.
European Search Report dated Nov. 10, 1992.

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