Pipe propelling device

Details Pipe propelling device Pipe propelling device

1986-08-12

1989-03-28

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Pipe or rod jack

Tie rod tensioner

E21B 1900

Patent

active

048156957

ABSTRACT:
A pipe propelling device comprises two sets of jack assemblies spaced from each other and arranged in the direction of propelling the pipe in a vertical shaft having a reacting shaft wall so that small diameter pipes such as water supply and drainage pipes, gas pipes and cable lying pipes can be propelled from the interior to the exterior of the vertical shaft by the extension of two sets of the jack assemblies. To reduce the dimension of the vertical shaft to propel the pipe, eliminate the interposition of a strut in propelling the pipe and secure an operative space in the vertical shaft, the jack assemblies comprise a plurality of first stage jacks connected to the reacting shaft wall and at least one second stage jack, a cylinder of the second stage jack being connected to cylinders of the first stage jacks.

REFERENCES:
patent: 3145964 (1964-08-01), Groetschel
patent: 3795176 (1974-03-01), Lado
patent: 4082248 (1978-04-01), Hinrichsen
patent: 4159819 (1979-07-01), Bargel et al.
patent: 4212374 (1980-07-01), Bubik
patent: 4662606 (1987-05-01), Akesaka

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