公开(公告)号：US20180162975A1

公开(公告)日：2018-06-14

申请号：US15726793

申请日：2017-10-06

Applicant: INSTITUTO MEXICANO DEL PETRÓLEO

Inventor： Edgar Iván Hernández Carbajal ,  César Andrés Flores Sandoval ,  Fernando Alvarez Ramirez ,  Alfonso López Ortega ,  Rodrigo de Jesús García Jiménez ,  Gerardo Zavala Olivares ,  Juan de la Cruz Clavel López ,  Flavio Salvador Vázquez Moreno

IPC: C08F220/18 ,  C10G33/04 ,  B01D17/04

CPC classification number: C08F220/18 ,  B01D17/047 ,  C08F2220/1808 ,  C08F2220/1825 ,  C08F2220/1841 ,  C08F2220/1875 ,  C08F2800/20 ,  C10G33/04 ,  C10G2300/201 ,  C08F220/34 ,  C08F220/14

Abstract: Nowadays, one of the major problems of the oil industry is the presence of large amounts of water and salts, which cannot be efficiently removed by conventional dehydrating polymers. In addition, the acid stimulation operations of petroleum wells cause the chemical degradation of demulsifiers such as polyethers and phenolic resins, reducing drastically their efficiency as water and salt removers. Based on aforementioned, a series of new copolymers has been developed; these copolymers are combinations of an acrylic and an aminoacrylic monomer and they are synthesized by semi-continuous emulsion polymerization (under starved feed conditions), which ensures both the homogeneity of the different chains as well as the randomness of the monomers distribution. The solutions of one of these random copolymers have shown an efficiency similar or superior to combinations of two or three block copolymers (formulations), when they are applied in light or heavy crude oils. The acrylic-aminoacrylic copolymers show good performance as water/oil emulsion breaker initiators, coalescence agents of water droplets and clarifiers of the remaining aqueous phase. In addition, the chemical structure of the acrylic copolymers confers resistance to degradation induced by abrupt pH changes when acid stimulation operations of wells are performed.

公开(公告)号：US11920092B2

公开(公告)日：2024-03-05

申请号：US18198588

申请日：2023-05-17

Applicant: Instituto Mexicano del Petróleo

Inventor： Cesar Andres Flores Sandoval ,  Flavio Salvador Vazquez Moreno ,  Fernando Alvarez Ramirez ,  Gerardo Zavala Olivares ,  Erika Gomez Buendia ,  Enrique Cevada Maya ,  Jessica Valeria Fuentes Santiago ,  Edgar Benedicto Zamora Guerrero ,  Citlally Janinne Vargas Martinez

IPC: C10G33/04 ,  C08F2/22 ,  C08F2/30 ,  C08F216/38 ,  C08F220/18 ,  C08L33/08

CPC classification number: C10G33/04 ,  C08F2/22 ,  C08F2/30 ,  C08F216/38 ,  C08F220/1804 ,  C08L33/08 ,  C10G2300/206 ,  C10G2300/308

Abstract: The present invention is related to the use of ethylene alkanoate-alkyl acrylate bipolymers with a high randomness monomers distribution, which are synthesized by semicontinuous emulsion polymerization process, characterized because it is carried out using slow addition rate of the pre-emulsion feeding ({dot over (q)}≤0.009 kgL·L−1·min−1), stabilized this last one by alkyl glycol ether type surfactants, at temperatures higher than 75° C. and with solids contents above 25 wt %, which avoids the formation of large sequences (blocks) of a same monomer. This structural characteristic gives the ethylene alkanoate-alkyl acrylate bipolymers a high efficiency as chemical agents for removal of complex water/crude oil emulsions of crude oil blends.