Patent ID: 11952535
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 9:
10. A thermochemical soap stick comprising:
a thermochemical soap material in a cylindrical shape to be provided to a wellbore in a subterranean formation and configured to dissolve in liquid comprising water in the wellbore, the thermochemical soap material comprising:
thermochemical reagents configured to react in a thermochemical reaction in the liquid to generate nitrogen gas to foam the liquid to give foam for unloading of the liquid from the wellbore, the thermochemical reagents comprising:
an ammonium-containing compound comprising ammonium hydroxide, ammonium chloride, ammonium bromide, ammonium nitrate, ammonium nitrite, ammonium sulfate, ammonium carbonate, or ammonium hydroxide, or any combinations thereof; and
a nitrite-containing compound comprises sodium nitrite or potassium nitrite, or both;

a carbon dioxide (CO2)-generating compound to generate CO2 in response to heat of the subterranean formation to promote formation and stability of the foam with CO2 generated by the CO2-generating compound; and
silica nanoparticles to stabilize the foam, the silica nanoparticles comprising a diameter less than 100 nanometers.