US 12,434,311 B2
Method for cutting a tubular structure at a drill floor and a cutting tool for carrying out such method
Petter Birkeland, Tananger (NO)
Assigned to CONTROL CUTTER AS, Tananger (NO)
Appl. No. 16/644,420
Filed by Control Cutter AS, Tananger (NO)
PCT Filed Nov. 22, 2018, PCT No. PCT/NO2018/050291
§ 371(c)(1), (2) Date Mar. 4, 2020,
PCT Pub. No. WO2019/108066, PCT Pub. Date Jun. 6, 2019.
Claims priority of application No. 20171910 (NO), filed on Nov. 29, 2017.
Prior Publication US 2020/0290136 A1, Sep. 17, 2020
Int. Cl. B23D 21/00 (2006.01); B23D 15/04 (2006.01); B23D 29/00 (2006.01); B26D 1/08 (2006.01); E21B 29/00 (2006.01)
CPC B23D 21/006 (2013.01) [B23D 15/04 (2013.01); B23D 29/002 (2013.01); B26D 1/08 (2013.01); E21B 29/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for cutting a rigid tubular structure at a drill floor of a drilling rig, the method comprising:
providing a cutting tool at the drill floor comprising a non-rotatable cutting element configured for carrying out a translational cutting movement through the rigid tubular structure, wherein the cutting tool comprises:
a tool body having an enclosure configured for positioning the rigid tubular structure therein;
an actuator mounted on the tool body at one side of the enclosure;
a non-rotatable cutting element coupled to and moveable by the actuator for carrying out the translational cutting movement through the rigid tubular structure; and
a reaction member mounted at an opposite side of the enclosure of the tool body opposite to the non-rotatable cutting element, wherein the reaction member closes the enclosure via a linear translational movement thereof in a first direction, wherein the reaction member is configured for opposing the translational cutting movement of the non-rotatable cutting element through the rigid tubular structure during cutting, and wherein the reaction member has a cross-section within the enclosure when the enclosure is closed that is elongated in a second direction, the cross-section being elongated to oppose the translational cutting movement through the rigid tubular structure, the second direction being coplanar but different than the first direction for closing the enclosure;
positioning the cutting tool in a cutting position exterior to the rigid tubular structure;
fixing the position of the cutting tool with respect to the rigid tubular structure;
closing the enclosure of the cutting tool while the rigid tubular structure is positioned therein; and
activating the cutting tool for cutting the rigid tubular structure via the translational cutting movement of the non-rotatable cutting element through the rigid tubular structure.