US 11,867,014 B2
Drilling assembly for removal of an obstacle in a conduit
Kristine Falk Gabrielsen, Stavanger (NO); Arne Motland, Stavanger (NO); and Lasse Haugland, Bryne (NO)
Assigned to Altus Intervention (Technologies) AS, Stavanger (NO)
Filed by Altus Intervention (Technologies) AS, Stavanger (NO)
Filed on Feb. 21, 2022, as Appl. No. 17/676,663.
Claims priority of application No. 20210227 (NO), filed on Feb. 22, 2021; and application No. 20220208 (NO), filed on Feb. 15, 2022.
Prior Publication US 2023/0091081 A1, Mar. 23, 2023
Int. Cl. E21B 29/00 (2006.01); E21B 4/00 (2006.01); E21B 31/00 (2006.01); E21B 10/26 (2006.01)
CPC E21B 29/002 (2013.01) [E21B 4/00 (2013.01); E21B 10/26 (2013.01); E21B 31/002 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A drilling assembly for making a passage in an object within a petroleum well, said drilling assembly is adapted to be displaced by a wireline tractor and supplied with a rotational force from a rotational motor, and said drilling assembly comprising:
a drill bit assembly;
a cutting assembly;
a rotatable drive assembly;
said drilling assembly forming a longitudinal center axis;
said drill bit assembly and the cutting assembly being fastened to the rotatable drive assembly;
said drill bit assembly comprises a drill bit at a free end of the drill bit assembly;
said cutting assembly is formed by a tubular body having a mouth portion provided with a hole saw assembly;
said cutting assembly being resiliently displaceable relative to the drill bit assembly along the center axis;
the drilling assembly further comprises a displaceable membrane within the tubular body, said displaceable membrane divides an interior of the tubular body into a receiving compartment of variable volume and an inner compartment of variable volume, and said displaceable membrane is fastened to one of the rotatable drive assembly and the drill bit assembly.