US 12,286,587 B2
Foam formulation and its use in temporary pipe plugging
Rone Cesar Morales, Rio de Janeiro (BR); Robinson Antonio Silva, Rio de Janeiro (BR); Sandra Helena Pulcinelli, São Paulo (BR); Edilene Cristina Ferreira, São Paulo (BR); Rodrigo Morais Menezes Dos Santos, São Paulo (BR); Eduardo Pena Dos Santos, São Paulo (BR); and Celso Valentim Santilli, São Paulo (BR)
Assigned to Petróleo Brasileiro S.A.—Petrobras, Rio de Janeiro (BR); and Universidade Estadual Paulista “Julio De Mesquita Filho” —UNESP, São Paulo (BR)
Filed by Petróleo Brasileiro S.A.—Petrobras, Rio de Janeiro (BR); and Universidade Estadual Paulista “Julio De Mesquita Filho”—UNESP, São Paulo (BR)
Filed on Oct. 6, 2022, as Appl. No. 17/961,227.
Claims priority of application No. 10 2021 020133 9 (BR), filed on Oct. 6, 2021.
Prior Publication US 2023/0108336 A1, Apr. 6, 2023
Int. Cl. C09K 8/518 (2006.01); C09K 8/514 (2006.01); E21B 33/12 (2006.01)
CPC C09K 8/518 (2013.01) [C09K 8/514 (2013.01); E21B 33/1208 (2013.01); C09K 2208/10 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A foam formulation characterized in that it comprises a surfactant or a mixture of surfactants, a co-surfactant or a mixture of co-surfactants, a base or a mixture of bases and LDH nanoparticles.