US 12,168,910 B2
Method and apparatus for plugging
Gert Olav Rege, Raege (NO)
Assigned to Wellstrøm AS, Raege (NO)
Appl. No. 17/919,960
Filed by Wellstrøm AS, Ræge (NO)
PCT Filed Feb. 23, 2021, PCT No. PCT/NO2021/050047
§ 371(c)(1), (2) Date Oct. 19, 2022,
PCT Pub. No. WO2021/221513, PCT Pub. Date Nov. 4, 2021.
Claims priority of provisional application 63/017,676, filed on Apr. 30, 2020.
Prior Publication US 2023/0160277 A1, May 25, 2023
Int. Cl. E21B 33/134 (2006.01); E21B 29/02 (2006.01); E21B 36/00 (2006.01); E21B 43/119 (2006.01)
CPC E21B 33/134 (2013.01) [E21B 29/02 (2013.01); E21B 36/008 (2013.01); E21B 43/1193 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A method for perforating and sealing a well conduit in a single run, the method comprising:
building a tool string comprising a perforating tool and a plugging tool, said perforating tool being arranged at a distal end of said tool string,
moving said tool string into said well conduit until said perforating tool is in a first position in said well conduit;
actuating said perforating tool to create a perforated zone of openings in said well conduit;
moving said plugging tool to said first position in the well conduit, said plugging tool comprising a hollow mandrel conveying a thermally activated sealing material on its exterior and a heater on its interior;
operating the plugging tool to activate the thermally activated sealing material disposed on said exterior of said hollow mandrel;
allowing said thermally activated sealing material to solidify in said well conduit to form a plug and to flow into said openings to fill a cross-section of an annular space outside said well conduit;
disconnecting said heater and recover said heater from said hollow mandrel, and subsequently running a logging tool into said hollow mandrel, said logging tool detecting said thermally activated sealing material deposited in said cross-section and said annular space; and
disconnecting said perforating tool from said tool string after said creating of said perforated zone has been completed, and letting said perforating tool drop in the well conduit to below said perforated zone.