# US 9,038,722 B2 · Cement compositions containing metphosphate and methods of use

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- Number: US 9,038,722 B2
- Document ID: US9038722B2
- Status: Granted
- Kind: B2
- Application number: 13/909,232
- Filed: 2013-06-04
- Published: 2014-04-17
- Granted: 2015-05-26
- Earliest claimed: 2012-10-15
- Assignees: Halliburton Energy Services, Inc.
- Applicants: Halliburton Energy Services, Inc.
- Inventors: Rahul Chandrakant Patil; Sandip Prabhakar Patil; Sohini Bose; Ashok K. Santra; Balasundaram Balaraman
- Web page: https://patentgrep.com/patent/US9038722B2

## CPC

- C09K 8/46: containing inorganic binders, e.g. Portland cement
- C04B 28/04: Portland cements
- C04B 28/08: Slag cements
- C09K 8/467: containing additives for specific purposes
- C09K 8/48: Density increasing or weighting additives
- E21B 33/13: Methods or devices for cementing, for plugging holes, crevices or the like
- E21B 33/138: Plastering the borehole wall; Injecting into the formation
- C04B 2103/0035: {Type G}
- C04B 2111/00215: {Mortar or concrete mixtures defined by their oxide composition}
- C04B 2111/10: Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- Y02W 30/91: Use of waste materials as fillers for mortars or concrete
- 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
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

In an embodiment, the cement compositions comprise: (i) hydraulic cement, wherein the hydraulic cement has a ratio of CaO to SiO2 in the range of 2.0 to 4.0; and (ii) a water-soluble metaphosphate in a concentration of at least 2.5% bwoc. In another embodiment, the cement compositions comprise: (i) hydraulic cement, wherein the hydraulic cement has a ratio of CaO to SiO2 of less than 2.0; and (ii) a water-soluble metaphosphate; wherein any alkali nitrate is in a concentration of less than 2% bwoc; and wherein any alkali hydroxide, alkali carbonate, or alkali citrate is in a concentration of less than 0.2% bwoc. Methods of cementing in a well comprising forming either of such cement compositions and introducing it into the well are provided.

## Claims

### Claim 1

A method of cementing a treatment zone of a well, the method comprising the steps of:
(A) forming a cement composition comprising:
(i) hydraulic cement, wherein the hydraulic cement has a ratio of CaO to SiO2 in the range of 2.0 to 4.0;
(ii) a water-soluble metaphosphate in a concentration of at least 2.5% bwoc; and
(iii) water; and
(B) introducing the cement composition into the well.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the metaphosphate comprises a hexametaphosphate.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the metaphosphate is selected from the group consisting of an alkali metal metaphosphate, an ammonium metaphosphate, and any combination thereof.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the metaphosphate is in a concentration of less than 10% bwoc.

### Claim 5 (depends on 1)

The method according to claim 1, wherein any alkali nitrate is in a concentration of less than 2% bwoc.

### Claim 6 (depends on 1)

The method according to claim 1, wherein any alkali hydroxide, alkali carbonate, or alkali citrate is in a concentration of less than 0.2% bwoc.

### Claim 7 (depends on 1)

The method according to claim 1, wherein any calcium aluminoferrite is in a concentration of less than 15% bwoc.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the design temperature is in the range of 100° F. to 170° F.