Patent · US Active

Method of cementing using polymeric retarder

US9187373B2 · kind B2 · utility

0Cited by

22References

20Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Windal Scott Bray · Cypress, US
Andreas Brandl · Wien, AT

Key dates

Filing date	Jan 16, 2012
Grant date	Nov 17, 2015
Priority date	—
Expiry date	Aug 20, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/91
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Set retarders of copolymers of at least one polymerizable ethylenically unsaturated monomer and at least one alkoxylated monomer are capable of delaying the hardening of a cementitious slurry when introduced into a subterranean formation until a downhole temperature greater than or equal to 500° F. is obtained, even in the absence of an intensifier.

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