US 12,338,713 B2
One trip system to set an alloy seal and mill through
Jake Dearmon, Birchwood (GB); and Matt Naylor, Houston, TX (US)
Assigned to BiSN Tec Ltd., Warrington (GB)
Filed by BISN Tec Ltd., Warrington (GB)
Filed on Sep. 7, 2023, as Appl. No. 18/243,463.
Claims priority of provisional application 63/404,494, filed on Sep. 7, 2022.
Prior Publication US 2024/0076956 A1, Mar. 7, 2024
Int. Cl. E21B 36/00 (2006.01); E21B 29/00 (2006.01); E21B 33/12 (2006.01)
CPC E21B 36/008 (2013.01) [E21B 29/002 (2013.01); E21B 33/1208 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A downhole tool assembly system for use in deploying alloy plugs and/or seals in oil and gas wells, said system comprising:
a tubular heater with an exothermic chemical reaction heat source, wherein the tubular heater is provided with a running tool at an up-hole end thereof;
a tubular mandrel in which a down-hole portion of the tubular heater is removably retained such that the tubular heater and the tubular mandrel are in thermal communication; and
a mill arranged on the outside on the tubular heater at a location proximal to the up-hole end thereof and separated from the tubular mandrel by a clearance space, wherein the mill comprises at least one flow port that by-passes the tubular heater and provides access to the clearance space from an up-hole location.