Cutting/expanding tool

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – With forming or cutting of pipe or cable

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Details

405184, 166 553, 138 97, 30 925, B23D 2106, E21B 2906, E02D 2910

Patent

active

051711060

ABSTRACT:
A cutting/expanding tool includes a cylindrical support body having a guide side and a cutting side, a pair of guide rollers mounted in tandem along the longitudinal axis of the support body on the guide side, a cutting wheel mounted between the tandem guide rollers on the cutting side of the support body, and an expander connected rearwardly of the support body. A plurality of cutting wheels may also be provided, each of progressively increasing diameter. A scoring wheel may be mounted forwardly of the cutting wheels to prescore the surface to be cut, so as to facilitate the cutting action, and a deburrer may be mounted rearwardly of all the cutting wheels so as to smooth the cut edge. A method of using the cutting/expanding tool is also described, whereby after the tool has been propelled through a buried main to cut and to expand it, a replacement main is drawn back through the existing main. A conical or wedge shaped expander may be used.

REFERENCES:
patent: 2983042 (1961-05-01), Frantz et al.
patent: 3181302 (1965-05-01), Lindsay
patent: 4106561 (1978-08-01), Jerome et al.
patent: 4505302 (1985-03-01), Streathfield et al.
patent: 4903406 (1990-02-01), Schosek et al.
patent: 4983071 (1991-01-01), Fisk et al.
patent: 5078546 (1992-01-01), Fisk et al.
patent: 5098225 (1992-03-01), Rockower

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