US 11,988,057 B2
Downhole wireline tool string
Peder Løkke Borg, Allerød (DK)
Assigned to WELLTEC A/S, Allerød (DK)
Filed by WELLTEC A/S, Allerød (DK)
Filed on Jan. 24, 2022, as Appl. No. 17/582,383.
Claims priority of application No. 21153349 (EP), filed on Jan. 25, 2021.
Prior Publication US 2022/0275708 A1, Sep. 1, 2022
Int. Cl. E21B 29/00 (2006.01); E21B 4/04 (2006.01); E21B 10/43 (2006.01); E21B 23/00 (2006.01); E21B 23/01 (2006.01); E21B 37/00 (2006.01); E21B 41/00 (2006.01)
CPC E21B 29/002 (2013.01) [E21B 4/04 (2013.01); E21B 10/43 (2013.01); E21B 23/001 (2020.05); E21B 23/01 (2013.01); E21B 37/00 (2013.01); E21B 41/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A downhole wireline tool string for removing material of a component in a well downhole by an annular grinding area, the downhole wireline tool string having an axial extension and a centre tool axis, a front end and a top end connectable to a wireline, comprising:
an electric motor powered through the wireline for providing rotational output,
a tool section for anchoring the downhole wireline tool string inside a well tubular metal structure,
an operational tool rotated by the rotational output and defining the front end and an end surface arranged axially opposite the wireline and comprising an annular wall having a circumference and a wall thickness defined by an inner wall radius and an outer wall radius from the centre tool axis,
wherein the operational tool comprises at least a first grinding section and a second grinding section arranged at the end surface, the first grinding section having an inner face being arranged at a first distance from the centre tool axis, the first distance being smaller than the inner wall radius, and the second grinding section having an outer face being arranged at a second distance from the centre tool axis, the second distance being greater than the outer wall radius, and
wherein an outer face of the first grinding section being arranged at a fourth distance from the centre tool axis, where the fourth distance is smaller than the second distance, and wherein at least one of the first grinding section and the second grinding section extends along an entire circumference of the annular wall.