US 12,071,834 B2
Downhole cutting tool
Ryan Low, Arbroath (GB); John Paul Fraser, Montrose (GB); Cherish Caledonia Bodman, Montrose (GB); and Scott Alexander James Main, Aberdeen (GB)
Assigned to CORETRAX GLOBAL LIMITED, Portlethen (GB)
Appl. No. 17/775,469
Filed by CORETRAX GLOBAL LIMITED, Aberdeen (GB)
PCT Filed Nov. 9, 2020, PCT No. PCT/EP2020/025502
§ 371(c)(1), (2) Date May 9, 2022,
PCT Pub. No. WO2021/089191, PCT Pub. Date May 14, 2021.
Prior Publication US 2022/0389796 A1, Dec. 8, 2022
Int. Cl. E21B 43/112 (2006.01); E21B 17/06 (2006.01)
CPC E21B 43/112 (2013.01) [E21B 17/06 (2013.01)] 16 Claims
OG exemplary drawing
 
8. A method of perforating a downhole tubular in an oil or gas well, the method comprising:
locating a downhole cutting tool in a downhole tubular, the downhole cutting tool having a body and a helically profiled member, the downhole cutting tool coupled to a drill string;
anchoring the cutting tool in the downhole tubular;
rotating the drill string to cause rotation of the helically profiled member relative to the body;
in response to rotating the helically profiled member, longitudinally translating an activation member along the body of the downhole cutting tool and along the helically profiled member; and
translating an outer cam of the activation member into engagement with an inner cam of a cutting member mounted on the body to radially move the cutting member from a retracted configuration to an extended configuration.