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1. WO2020197401 - PROCÉDÉ AMÉLIORÉ DE DÉCOUPE DE TUYAUX SUR UN PLANCHER DE FORAGE ET OUTIL ASSOCIÉ

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

C l a i m s

1. Method for cutting a tubular structure (1) in the petrochemical industry , using a cutting tool (100) having a non-rotatable cutting element (130) and a reaction member (140) opposite to the non-rotatable cutting element (135), the cutting tool (100) being configured for carrying out a translational cutting movement through the tubular struc ture (1),

wherein the method comprises the following steps:

a) positioning the cutting tool (100) in a first position (P1) exterior to the tubular structure (1);

b) squeezing the tubular structure (1) at the first position (P1) by activating a partial translational cutting movement of the non-rotatable cutting element (135) to obtain a dented region (D1) in the tubular structure (1);

c) positioning the cutting tool (100) in a second position (P2) exterior to the tubular structure (1), wherein the second position (P2) is displaced over a predefined distance (dp) compared to the first position (P1), and

d) cutting the tubular structure (1) at the second position (P2) by activating a full translational cutting movement of the non-rotatable cutting element (135) through the tubular structure (1).

2. The method according to claim 1 , wherein, in operational use of the method, the tubular structure (1) is oriented in an upright position, and wherein the second position (P2) is located above the first position.

3. The method according to claims 1 or 2, wherein the cutting tool (100) is moved to and from the tubular structure (1) by means of a crane or manipulator.

4. The method according to any one of claims 1 to 3, wherein the cutting tool (100) is moved to and from the tubular structure (1) by means of a rail system.

5. The method according to any one of the preceding claims, wherein the tubular structure (1) in the petrochemical industry to be cut is one of the group consisting of: a conductor, a casing, a cemented casing, a lined casing, a cemented lined casing, a drill string, a drill pipe, a production tubing, and a riser.

6. The method according to any one of the preceding claims, wherein the cutting tool (100) that is used comprises:

a tool body (110) configured for receiving the tubular structure (1) in an enclosure (50) thereof;

an actuator (120) mounted on the tool body (110) at one side (S1) of the enclo sure;

a non-rotatable cutting element (135) provided on the actuator (120), the actuator (120) with the cutting element (135) being configured for carrying out a translational cutting movement through the enclosure (50) including the tubular structure (1), and a reaction member (140) mounted at an opposite side (S2) of the enclosure (50) of the tool body (110) opposite to the cutting element (135) for applying a reaction force on the tubular structure (1) during cutting,

wherein, in the steps of positioning, the tubular structure (1) is received within the enclosure (50).

7. The method according to claim 6, wherein in the cutting tool (100) that is used, the reaction member (140) is provided with a further cutting element (145) directed to wards the non-rotatable cutting element (135) for facilitating the cutting.

8. Method of handling a tubular structure (1) comprising the method according to any one of the preceding claims, further comprising the step of gripping the dented re gion (1) of the tubular structure (1) with a slips device (200) configured for gripping in between shoulders (199) of the dented region (1).

9. The method according to claim 8, further comprising the step of lifting the tubular structure (1) by lifting the slips device (200).

10. Cutting tool (100) in the method in accordance with any one of the preceding claims, wherein the non-rotatable cutting element (135) is configurable to form a sharp cutting edge (135s) or a blunter cutting edge (137b) depending on the actual need.

11. The cutting tool (100) in accordance with claim 10, wherein the non-rotatable cut ting element (135) is provided with an adapter device (137) to cover the cutting edge (135s) of the non-rotatable cutting element (135) in order to form the blunter cutting edge (137b).

12. The cutting tool (100) in the method in accordance with any one of claims 7, and 8 or 9 in as far as directly or indirectly dependent on claim 7, wherein the further cutting element (145) on the reaction member (140) is configurable to form a further sharp cut ting edge (145s) or a further blunter cutting edge (147b) depending on the actual need.

13. The cutting tool (100) in accordance with claim 12, wherein the further cutting el ement (145) is provided with a further adapter device (147) to cover the further cutting edge (145s) of the further cutting element (145) in order to form the blunter cutting edge (147b).