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

Claim 15:
16. A thermochemical soap stick comprising:
a thermochemical soap material that is solid 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;

silica nanoparticles to stabilize the foam, the silica nanoparticles comprising a diameter less than 100 nanometers; and
a friction-reducing surfactant to reduce friction experienced in unloading the liquid from the wellbore, the friction-reducing surfactant comprising polyacrylic acid, polyacrylamide, hydrolyzed polyacrylamide, or acrylamidomethyl propane sulfonate, or any combinations thereof.