Cutting/expanding tool

Details Cutting/expanding tool Cutting/expanding tool

1990-12-31

1992-03-24

Corbin, David H.

Hydraulic and earth engineering

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

With forming or cutting of pipe or cable

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

Patent

active

050982257

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.

REFERENCES:
patent: 2983042 (1961-05-01), Frantz et al.
patent: 3181302 (1959-08-01), Lindsay
patent: 4106561 (1978-08-01), Jerome et al.
patent: 4903406 (1990-02-01), Schosek et al.
patent: 4983071 (1991-01-01), Fisk et al.

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