US 12,215,559 B2
Thermite method of abandoning a well
Philip Head, Berkshire (GB)
Assigned to PSP-IP Limited, Newcastle Upon Tyne (GB)
Appl. No. 18/009,465
Filed by PSP-IP Limited, Newcastle upon Tyne (GB)
PCT Filed Jun. 9, 2021, PCT No. PCT/GB2021/051431
§ 371(c)(1), (2) Date Dec. 9, 2022,
PCT Pub. No. WO2021/250401, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 2008656 (GB), filed on Jun. 9, 2020; application No. 2008658 (GB), filed on Jun. 9, 2020; and application No. 2011982 (GB), filed on Jul. 31, 2020.
Prior Publication US 2023/0220740 A1, Jul. 13, 2023
Int. Cl. E21B 29/02 (2006.01); E21B 23/04 (2006.01); E21B 41/00 (2006.01)
CPC E21B 29/02 (2013.01) [E21B 23/0417 (2020.05); E21B 41/0078 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A well cutting tool, comprising;
a housing including a chamber;
the housing having at least one nozzle;
the chamber being loaded with thermite, and a gas-generating additive; and
an ignitor;
such that when the ignitor is actuated to ignite the thermite, the gas-generating additive is caused to create an increase in pressure which discharges energised molten thermite from the chamber and out of the housing through the at least one nozzle, wherein there is provided a volume of liquid in a hermetically sealed container inside the thermite chamber, such that when the thermite is heated, it converts the liquid to a highly energised state which results in a highly energised plasma jet which discharges with the energised molten thermite.