Cement having cross-linked polymers

Patent metadata

Field	Value
Publication number	US-10377940-B2
Application number	US-201715701670-A
Country	US
Kind code	B2
Filing date	Sep 12, 2017
Priority date	Sep 20, 2016
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

A composition and method of forming a wellbore cement that includes a cross-linked polyamide. The polyamide is formed by reacting a di-functional amine with an aromatic trifunctional carboxylic acid. The wellbore cement composition is created by blending cement and water with the polyamide and then allowed to cure. Increases in compressive strength, Young's Modulus, and Poisson's Ratio of the cement were realized by adding the polyamide to the cement composition.

First claim

What is claimed is:

1. A cement composition for use in a wellbore comprising:
a cement;
a calcium silicate in the cement; and
a polyaramide condensate compound that is cross-linked and formed from a trifunctional carboxylic acid and a diamine comprising 1,6-diaminohexane that is mixed with sebacoyl chloride.

2. A cement composition for use in a wellbore comprising:
a cement;
a calcium silicate in the cement; and
a polyaramide condensate compound that is cross-linked and formed from a diamine and a trifunctional carboxylic acid that comprises 1,3,5-benzenetricarboxylic acid chloride.

3. A cement composition for use in a wellbore comprising:
a cement;
a calcium silicate in the cement; and
a polyaramide condensate compound that is cross-linked and formed from a trifunctional carboxylic acid and a diamine, where the polyaramide comprises poly(ethylene trimesoylamide).

4. A cement composition for use in a wellbore comprising:
a cement;
a calcium silicate in the cement; and
a polyaramide condensate compound that is cross-linked and formed from a trifunctional carboxylic acid and a diamine, where the polyaramide comprises poly-(para-phenylene trimesoylamide).

Assignees

• Saudi Arabian Oil Co

Inventors

• Contreras Elizabeth Q

Classifications

• C09K8/467

  containing additives for specific purposes · CPC title

• E21B43/16

  Enhanced recovery methods for obtaining hydrocarbons · CPC title

• C04B24/04

  Carboxylic acids; Salts, anhydrides or esters thereof · CPC title

• C04B28/04 Primary

  Portland cements · CPC title

• C04B24/287

  Polyamides · CPC title