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1. (WO1991018235) PIPE BURSTING AND REPLACEMENT APPARATUS AND METHOD
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/018235 International Application No.: PCT/US1991/000972
Publication Date: 28.11.1991 International Filing Date: 13.02.1991
Chapter 2 Demand Filed: 18.11.1991
IPC:
E21B 7/20 (2006.01) ,E21B 7/30 (2006.01) ,E21B 29/00 (2006.01) ,F16L 55/165 (2006.01)
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
7
Special methods or apparatus for drilling
20
Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
7
Special methods or apparatus for drilling
28
Enlarging drilled holes, e.g. by counterboring
30
without earth removal
E FIXED CONSTRUCTIONS
21
EARTH OR ROCK DRILLING; MINING
B
EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
29
Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
L
PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
55
Devices or appurtenances for use in, or in connection with, pipes or pipe systems
16
Devices for covering leaks in pipes or hoses, e.g. hose-menders
162
from inside the pipe
165
a pipe being inserted in the damaged section
Applicants:
CONSOLIDATED EDISON COMPANY OF NEW YORK, INC. [US/US]; 4 Irving Place New York, NY 10003, US
Inventors:
FISK, Allan, T.; US
FREED, David, I.; US
MANN, Thomas, A.; US
Agent:
HAFFNER, Alfred, L., Jr.; Brooks Haidt Haffner & Delahunty 99 Park Avenue New York, NY 10016, US
Priority Data:
524,23115.05.1990US
Title (EN) PIPE BURSTING AND REPLACEMENT APPARATUS AND METHOD
(FR) RUPTURE DE TUYAU, APPAREIL ET PROCEDE POUR REMPLACER UN TUYAU
Abstract:
(EN) Tool (21) for slitting and laterally expanding underground steel gas mains (27) and inserting replacement plastic piping (77) into the spread apart pipeline has a forward end cylindrical portion (45a) mounting a single, rearwardly angled blade (56) to make only one line of cut (80) and a conical pipe spreader portion (50) at its rearward end (21b). The conical spreader portion (50) is eccentrically disposed with respect to the forward end cylindrical portion (45a). A single roller type pipe slitter (60) aligned with the fixed blade (56) may be mounted on a removable extension (45b) of the forward end cylindrical portion (45a), to initially groove and weaken the pipe along the intended line of cut. A pneumatically operated impact ram (22) is attached to the rearward end (21b) of the tool (21), as is the leading end of the replacement piping (77). A wire cable (25) pulls the tool (21) through the underground pipe, thereby grooving, slitting and laterally expanding the pipe (27).
(FR) Outil (21) permettant de fendre et d'élargir latéralement une conduite principale de gaz souterraine (27) et d'introduire une tuyauterie de remplacement (177) en plastique dans la canalisation ouverte. L'outil comprend une partie cylindrique (45a) au niveau de son extrémité avant, qui supporte une lame unique (56) dont l'angle (56), orienté vers l'arrière, sert à faire une seule ligne de coupe (80), et une partie conique (50) élargisseuse de tuyau située à son extrémité arrière (21b). La partie élargisseuse conique (50) est placée de manière excentrée par rapport à la partie cylindrique (45a) de l'extrémité avant. On peut monter sur un prolongement séparable (45b) de la partie cylindrique (45a), une découpeuse de tuyau (60) à un seul rouleau alignée avec la lame fixe (56), pour commencer à entailler et à affaiblir le tuyau le long de la ligne de coupe prévue. Un marteau à impact pneumatique (22) est fixé à l'extrémité arrière (21b) de l'outil (21), ainsi que l'extrémité d'attaque de la tuyauterie de remplacement (77). Un câble métallique (25) tire l'outil (21) dans la conduite souterraine, effectuant ainsi les opérations de rainurage, de découpage et d'élargissement latéral de la conduite (27).
Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0528801