# US 10,370,294 B2 · Single blended cement system for use at wide ranges of density and temperatures

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,370,294 B2
- Document ID: US10370294B2
- Status: Granted
- Kind: B2
- Application number: 15/839,938
- Filed: 2017-12-13
- Published: 2019-06-13
- Granted: 2019-08-06
- Earliest claimed: 2017-12-13
- Assignees: Baker Hughes, A Ge Company, LLC
- Applicants: Shailesh Shashank Dighe; Shannon E. Bryant; Matthew Kellum; Gregory D. Dean; Antonio Bottiglieri
- Inventors: Shailesh Shashank Dighe; Shannon E. Bryant; Matthew Kellum; Gregory D. Dean; Antonio Bottiglieri
- Web page: https://patentgrep.com/patent/US10370294B2

## CPC

- C04B 14/106: {Kaolin}
- C04B 7/00: Hydraulic cements (calcium sulfate cements C04B11/00)
- C04B 14/062: {Microsilica, e.g. colloïdal silica (preparing microsilica slurries or suspensions C04B18/148)}
- C04B 28/04: Portland cements
- C09K 8/46: containing inorganic binders, e.g. Portland cement
- C09K 8/473: Density reducing additives, e.g. for obtaining foamed cement compositions
- C09K 8/48: Density increasing or weighting additives
- E21B 33/14: for cementing casings into boreholes
- C04B 2103/0035: {Type G}
- C04B 2201/20: for the density
- Y02W 30/91: Use of waste materials as fillers for mortars or concrete
- 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
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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

A method of cementing a wellbore penetrating a subterranean formation comprises blending a base cement slurry with one or more liquid additives to provide a cementing composition, the base cement slurry comprising a liquid carrier, a class G cement or a blend of class G and class C cements as defined by the American Petroleum Institute (API) Specification 10A standards (R2015), and silica fume, or fumed silica, or a combination of silica fume and fumed silica, the base cement slurry having a density of about 14 to about 16 ppg; and injecting the cementing composition into the wellbore. The single base cement slurry can be used globally to make cementing compositions having wide ranges of density and temperature stability.

## Claims

### Claim 1

A method of cementing a wellbore penetrating a subterranean formation, the method comprising:
blending a base cement slurry with one or more liquid additives to provide a cementing composition,
the base cement slurry comprising
a liquid carrier;
a class G cement or a combination of a class G and class C cements;
silica fume, or fumed silica, or a combination of silica fume and fumed silica,
the base cement slurry having a density of 14 to 16 ppg; and
injecting the cementing composition into the wellbore,
wherein the one or more of the liquid additives comprise a heavy weight liquid additive comprising (1) about 100 to about 200 wt % of cerium oxide; or about 300 to about 500 wt % of manganese oxide, (2) water; and (3) 0.5 to 2 wt % of a diutan gum, each by weight of the water in the heavy weight liquid additive, the heavy weight liquid additive having a density of about 20 to about 24 ppg.

### Claim 2 (depends on 1)

The method of claim 1, wherein the base cement slurry comprises about 1 to about 10 wt % of the fumed silica or silica fume or a combination of the fumed silica and silica fume, each based on the total weight of the base cement slurry.

### Claim 3 (depends on 2)

The method of claim 2, wherein the base cement slurry comprises water, class G cement, about 1 to about 10 wt % of kaolinite clay, and about 3 to 7 wt % of silica fume or fumed silica or a combination thereof, each based on the total weight of the base cement slurry.

### Claim 4 (depends on 2)

The method of claim 2, wherein the base cement slurry comprises water, a blend of class G and class C cements having a weight ratio of about 5:1 to about 3:1, and about 3 to 7 wt % of silica fume or fumed silica or a combination thereof, each based on the total weight of the base cement slurry.

### Claim 5 (depends on 1)

The method of claim 1, wherein the heavy weight liquid additive further comprises a dispersant.

### Claim 6 (depends on 1)

The method of claim 1, wherein the heavy weight liquid additive comprises about 100 to about 200 wt % of cerium oxide and about 0.5 to 2 wt % of the diutan gum, each by weight of the water in the heavy weight liquid additive.

### Claim 7 (depends on 1)

The method of claim 1, wherein the heavy weight liquid additive comprises about 300 to about 500 wt. % of manganese oxide and 0.5 to 2 wt % of the diutan gum, each by weight of the water in the heavy weight liquid additive.

### Claim 8 (depends on 1)

The method of claim 1, wherein the liquid additive further comprises a retarder, accelerator, fluid loss additive, foam preventer, or a buffering agent.

### Claim 9 (depends on 1)

The method of claim 1, wherein the base cement slurry is not directly blended with any solid additive.

### Claim 10 (depends on 1)

The method of claim 1, wherein the cementing composition has a density of about 11 to about 18 ppg.

### Claim 11 (depends on 1)

The method of claim 1, wherein the cementing composition has a temperature stability range of about 40° C. to about 350° C.

### Claim 12

A method of cementing a wellbore penetrating a subterranean formation, the method comprising:
blending a base cement slurry with one or more liquid additives to provide a cementing composition,
the base cement slurry comprising
a liquid carrier;
a class G cement or a combination of a class G and class C cements;
silica fume, or fumed silica, or a combination of silica fume and fumed silica,
the base cement slurry having a density of 14 to 16 ppg; and
injecting the cementing composition into the wellbore;
wherein the one or more liquid additives comprise a light weight liquid additive comprising (1) about 30 to about 50 wt % of a glass sphere, (2) about 0.5 to about 2 wt % of a diutan gum, and (3) water by weight of the water in the light weight liquid additive, the liquid weight liquid additive having a density of 5 to 7.

### Claim 13 (depends on 12)

The method of claim 12, wherein the glass sphere is a borosilicate glass sphere.

### Claim 14

A method of cementing a wellbore penetrating a subterranean formation, the method comprising:
blending a base cement slurry with one or more liquid additives to provide a cementing composition,
the base cement slurry comprising
a liquid carrier;
a class G cement or a combination of a class G and class C cements;
about 1 to about 10 wt % of kaolinite clay,
about 3 to 7 wt % of silica fume, or fumed silica, or a combination of silica fume and fumed silica,
the base cement slurry having a density of 14 to 16 ppg; and
injecting the cementing composition into the wellbore,
wherein the one or more liquid additives comprise a silica suspension liquid additive which comprises (1) 20 to 40 wt % of silica flour, (2) 20 to 40 wt % of silica sand, (3) a diutan gum, and (4) 20 to 40 wt % % water each based on the total weight of the silica suspension liquid additive.

### Claim 15 (depends on 14)

The method of claim 14, wherein the base cement slurry is free of silica sand and silica flour; and the base cement slurry is blended with the silica suspension liquid additive in an amount such that the cementing composition has a target cement performance in a high temperature well environment.