Patent · US Active

Delayed gelation polymer system for high temperature and high salinity applications

US12049588B2 · kind B2 · utility

0Cited by

5References

20Claims

0Family size

Assignees

CNPC USA Corporation · US
Beijing Huamei, Inc. · CN
China National Petroleum Corporation · CN

Inventors

Meng Lu · Urbana, US
Danhua Zhang · Houston, US
Fuchen Liu · Panjin City, CN
Nancy Zhou · Sugar Land, US
Jianshen Li · Beijing, CN
Weibin Zha · Diemelstraße, US

Key dates

Filing date	Mar 31, 2023
Grant date	Jul 30, 2024
Priority date	—
Expiry date	Mar 31, 2043

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B43/16
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

This disclosure describes the composition and methods of use for a novel delayed polymer gelation system for high temperature and high salinity applications. This polymer gelation system includes a polymer of acrylamide, AMPS and 500-5000 ppm polyethylene glycol diacrylate in inverse emulsion form, and a polyethyleneimine (PEI) with a MW of 2,000-30,000 daltons as the crosslinking agent.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.