Abrégé

The invention comprises a hydraulic cutting tool (24; 86), a system, a method, and also uses of the cutting tool (24; 86) and the system, for hydraulic cutting through a pipe wall (26) of a pipe body (8). For this purpose, the cutting tool (24; 86) is provided with at least one cutting section (52; 88, 90) comprising at least one fluid discharge body (54; 54´). Each such fluid discharge body (54; 54´) comprises at least two outwardly directed discharge openings (76a, 78a; 76a´, 78a´) having non-parallel discharge directions (70a, 72a; 70a´, 72a´) directed at a common intersection point (74; 74´) located outside the fluid discharge body (54; 54´). The cutting is carried out by means of an abrasive fluid (32) being supplied, via a flow-through pipe string (30), to the at least one fluid discharge body (54; 54´) from a remote location. Thereby, abrasive cutting jets (76b, 78b; 76b´, 78b´) will discharge at high velocity from the fluid discharge body (54; 54´) so as to meet and disperse in the intersection point (74; 74´), thus weakening the further cutting ability of the cutting jets (76b, 78b; 76b´, 78b´).

Classes IPC  ?

• E21B 43/114 - Perforateurs utilisant l'action directe d'un fluide, p. ex. jets abrasifs
• E21B 29/08 - Découpage ou déformation des tuyaux pour commander l'écoulement du fluide

Abrégé

A hydraulic cutting tool, a system, and a method are for hydraulic cutting through a pipe wall of a pipe body. For this purpose, the cutting tool is provided with at least one cutting section comprising at least one fluid discharge body. Each such fluid discharge body comprises at least two outwardly directed discharge openings having non-parallel discharge directions directed at a common intersection point located outside the fluid discharge body. The cutting is carried out by means of an abrasive fluid being supplied, via a flow-through pipe string, to the at least one fluid discharge body from a remote location. Thereby, abrasive cutting jets will discharge at high velocity from the fluid discharge body so as to meet and disperse in the intersection point, thus weakening the further cutting ability of the cutting jets.

Classes IPC  ?

• E21B 29/06 - Découpage de fenêtres, p. ex. découpage directionnel de fenêtres en vue d'opérations impliquant des sifflets-déviateurs
• E21B 43/114 - Perforateurs utilisant l'action directe d'un fluide, p. ex. jets abrasifs
• E21B 33/13 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues

Abrégé

A method is for removing casing from a well. The method includes setting a first sealing element into fluid-sealing engagement with the inside of the casing, lowering a flow-through string into the well, a cutting tool and a second, reversibly expandable sealing element being connected to the string, forming perforations into the casing by means of said cutting tool, expanding the second, expandable sealing element into fluid-sealing engagement with the inside of the casing, passing a pressurized fluid through the string and into the annulus via the perforations, so that the viscous and/or solid mass is displaced up the annulus, cutting the casing around its entire circumference; and pulling a length of the casing up from the well.

Classes IPC  ?

• E21B 31/16 - Outils de préhension, p. ex. pinces ou grappins combinés à des moyens de découpage ou de destruction
• E21B 31/03 - Dégagement par jet de liquide
• E21B 29/00 - Découpage 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 fenêtresDéformation des tubes dans les trous de forageRemise en état des tubages de puits sans les retirer du sol

Abrégé

A method of removing casing (3) from a well (1) is described, the method including the following steps: (A) setting a first sealing element (11) into fluid-sealing engagement with the inside of the casing (3); (B) lowering a flow-through string (9) into the well, a cutting tool (93) and a second, reversibly expandable sealing element (91) being connected to the string (9); (C) forming perforations (31) into the casing (3) by means of said cutting tool (93); (D) expanding the second, expandable sealing element (91) into fluid-sealing engagement with the inside of the casing (3); (E) passing a pressurized fluid (95) through the string (9) and into the annulus (5) via the perforations (31), so that the viscous and/or solid mass (55) is displaced up the annulus (5); (F) cutting the casing (3) around its entire circumference; and (G) pulling a length (L1) of the casing (3) up from the well (1).

Classes IPC  ?

• E21B 23/00 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage
• E21B 29/00 - Découpage 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 fenêtresDéformation des tubes dans les trous de forageRemise en état des tubages de puits sans les retirer du sol
• E21B 31/03 - Dégagement par jet de liquide
• E21B 43/11 - PerforateursPerméators