# US 2019/0169482 A1 · Cement Having Cross-Linked Polymers

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- Number: US 2019/0169482 A1
- Document ID: US20190169482A1
- Status: Published application
- Kind: A1
- Application number: 16/272,529
- Filed: 2019-02-11
- Published: 2019-06-06
- Earliest claimed: 2016-09-20
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Elizabeth Q. Contreras
- Web page: https://patentgrep.com/patent/US20190169482A1

## CPC

- C09K 8/46: containing inorganic binders, e.g. Portland cement
- C04B 14/465: {Ca-silicate, e.g. wollastonite}
- C04B 24/04: Carboxylic acids; Salts, anhydrides or esters thereof
- C04B 24/121: {Amines, polyamines}
- C04B 24/287: {Polyamides}
- C04B 28/04: Portland cements
- C08F 283/04: on to polycarbonamides, polyesteramides or polyimides {(C08F283/004 takes precedence)}
- C09K 8/467: containing additives for specific purposes
- E21B 43/16: Enhanced recovery methods for obtaining hydrocarbons
- C04B 2103/0062: {Cross-linked polymers}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A wellbore cement composition that includes a cross-linked polyamide. The polyamide is formed by reacting a di-functional amine with an aromatic tri-functional 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 are realized by adding the polyamide to the cement composition.

## Claims

### Claim 1

A cement composition for use in a wellbore comprising:
a cement; and
a polyamide compound that is cross-linked and formed from an aromatic triacid chloride and an amine.

### Claim 2 (depends on 1)

The cement composition of claim 1, where the polyamide has a molecular weight ranging from about 189 Daltons to about 555 Daltons.

### Claim 3 (depends on 1)

The cement composition of claim 1, where the cement comprises a silica selected from the group consisting of crystalline silica and calcium silicate.

### Claim 4 (depends on 1)

The cement composition of claim 1, where the amine comprises a diamine selected from the group consisting of ethylenediamine, 1,3-diaminobenzene, 1,4-diaminobenzene, 1,6-diaminohexane, 1,4-phenylenediamine, and combinations.

### Claim 5 (depends on 1)

The cement composition of claim 1, where the triacid chloride comprises 1,3,5-benzenetricarboxylic acid chloride.

### Claim 6 (depends on 1)

The cement composition of claim 1, where the amine comprises 1,6-diaminohexane that is mixed with sebacoyl chloride.

### Claim 7 (depends on 1)

The cement composition of claim 1, where the polyamide compound comprises an amount that ranges from about 1% by weight of the cement to about 6% by weight of the cement.