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1. AU2003238734 - A device for a hydraulic cutting tool

Office
Australie
Numéro de la demande 2003238734
Date de la demande 04.06.2003
Numéro de publication 2003238734
Date de publication 11.09.2003
Type de publication B2
CIB
E21B 29/12
ECONSTRUCTIONS FIXES
21FORAGE DU SOL OU DE LA ROCHE; EXPLOITATION MINIÈRE
BFORAGE DU SOL OU DE LA ROCHE; EXTRACTION DU PÉTROLE, DU GAZ, DE L'EAU OU DE MATÉRIAUX SOLUBLES OU FUSIBLES OU D'UNE SUSPENSION DE MATIÈRES MINÉRALES À PARTIR DE PUITS
29Découpage ou destruction de tubes, packers, bouchons ou câbles, situés dans les trous de forage ou dans les puits, p.ex. découpage de tubes endommagés, de fenêtres; Déformation des tubes dans les trous de forage; Remise en état des tubages de puits sans les retirer du sol
12spécialement adapté aux installations sous-l'eau
E02D 9/00
ECONSTRUCTIONS FIXES
02HYDRAULIQUE; FONDATIONS; TERRASSEMENT
DFONDATIONS; EXCAVATIONS; DIGUES; OUVRAGES SOUTERRAINS OU SOUS L'EAU
9Enlèvement de rideaux de palplanches, de pieux, de tubages ou d'autres coffrages
CPC
E02D 9/005
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS
9Removing sheet piles bulkheads, piles, mould-pipes or other moulds ; or parts thereof
005removing the top of placed piles of sheet piles
E21B 29/12
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
29Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows
12specially adapted for underwater installations
Déposants Norse Cutting & Abandonment AS
Inventeurs Lund, Per
Wiig, Erling J.
Mandataires Griffith Hack
Données relatives à la priorité 20022668 06.06.2002 NO
Titre
(EN) A device for a hydraulic cutting tool
Abrégé
(EN) A device for a hydraulic cutting tool (30) for cutting of at least one pipe (16, 18, 20) or tubular object beneath a water floor (10), wherein the cutting is carried out from a surface facility (2). The cutting tool (30) is anchored in a pressure tight manner in the pipe (16), whereupon pressurised gas (86) is pumped into a pipe section (80) immediately below the cutting tool (30). With this, liquid (8), and eventually pressurised gas (86), will flow out of the pipe section (80) via a short drain pipe (66) through the cutting tool (30), so as to create a gas filled pipe volume (90) comprising the relevant cutting depth (32) in the pipe section (80). The invention differs from prior art by the outflowing liquid being led onwards up to the surface facility (2) via a drain line (92). The upper end portion of the drain line (92) is connected to at least one adjustable choke device (102, 104). This allows the gas overpressure in said pipe volume (90) to be controlled during the cutting, providing optimal operating conditions during the hydraulic cutting.