# US 10,479,923 B2 · Cement composition for lost circulation application and method of cementing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,479,923 B2 - Document ID: US10479923B2 - Status: Granted - Kind: B2 - Application number: 14/907,597 - Filed: 2013-11-25 - Published: 2016-06-09 - Granted: 2019-11-19 - Earliest claimed: 2013-11-25 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: Sandip Prabhakar Patil; Rahul Chandrakant Patil; Krishna M. Ravi; Sheetal Singh; Trissa Joseph; Marcus Duffy - Web page: https://patentgrep.com/patent/US10479923B2 ## CPC - C09K 8/487: Fluid loss control additives; Additives for reducing or preventing circulation loss - C04B 28/02: containing hydraulic cements other than calcium sulfates - C04B 28/04: Portland cements - C09K 8/467: containing additives for specific purposes - E21B 33/14: for cementing casings into boreholes - C04B 2111/00008: {Obtaining or using nanotechnology related materials} - 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 ## Abstract A method of cementing a subterranean formation includes providing a cement composition comprising cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier, where the solid materials are about 0 wt % to about 40 wt % of the total weight of the cement composition; introducing the cement composition into a subterranean formation; and allowing the cement composition to set in the subterranean formation. Cement compositions include cementitious material, aqueous base fluid, nanoparticles, synthetic clay, and a thixotropic modifier. ## Claims ### Claim 1 A method of cementing a subterranean formation comprising: preparing a cement composition comprising: an aqueous base fluid; and solid materials comprising: a microfine cement; nanoparticles comprising nano-silica; a synthetic clay; and a thixotropic modifier, wherein the thixotropic modifier is selected from sodium silicate, silicic acid, and combinations thereof, wherein the thixotropic modifier is present in an amount of about 0.1% to about 5% by weight of a cementitious material; introducing the cement composition into a subterranean formation; and allowing the cement composition to set into the subterranean formation. ### Claim 2 (depends on 1) The method of claim 1, wherein the solid materials are about 10 wt % to about 20 wt % of the total weight of the cement composition. ### Claim 3 (depends on 1) The method of claim 1, wherein the nanoparticles further comprise at least one of nanocarbonate, nanoalumina, and any combination thereof. ### Claim 4 (depends on 1) The method of claim 1, wherein the nanoparticles are present in the amount of about 0.1 to about 5 gal/sack. ### Claim 5 (depends on 1) The method of claim 1, wherein the nanoparticles have a diameter of about 2 to about 100 microns. ### Claim 6 (depends on 1) The method of claim 1, wherein the synthetic clay is present in an amount of about 0.1% to about 3.0% by weight of water. ### Claim 7 (depends on 1) The method of claim 1, wherein substantially no natural clay is added to the cement composition. ### Claim 8 (depends on 1) The method of claim 1, wherein the aqueous base fluid comprises at least one of fresh water; brackish water; saltwater; and combinations thereof. ### Claim 9 (depends on 1) The method of claim 1, wherein the aqueous bas fluid is present in the cement composition in an amount of from about 20% to about 80% by weight of cement. ### Claim 10 (depends on 1) The method of claim 1, wherein the cement composition further comprises at least one cementitious material selected from the group consisting of Portland cements; gypsum cements; high alumina content cements; slag cements; high magnesia content cements; shale cements; acid/base cements; fly ash cements; zeolite cement systems; kiln dust cement systems; metakaolin; pumice; and combinations thereof. ### Claim 11 (depends on 1) The method of claim 1, further comprising at least one of resins; latex; stabilizers; silica; pozzolans; microspheres; aqueous superabsorbers; viscosifying agents; suspending agents; dispersing agents; salts; accelerants; surfactants; retardants; defoamers; settling-prevention agents; weighting materials; fluid loss control agents; elastomers; vitrified shale; gas migration control additives; formation conditioning agents; and combinations thereof. ### Claim 12 (depends on 1) The method of claim 1, wherein a density of the cement composition before curing is less than about 12 pounds per gallon. ### Claim 13 (depends on 1) The method of claim 1, wherein the thixotropic modifier is present in the amount of about 0.1% to about 150% bwc. ### Claim 14 (depends on 1) The method of claim 1, wherein the nanoparticles are particulate and added in the preparing step as a dry nano-silica powder, and wherein solid materials are about 0 wt % to about 40 wt % of a total weight of the cement composition. ### Claim 15 A well cement composition comprising: an aqueous base fluid; solid materials comprising: a microtine cement; nanoparticles comprising nano-silica; a synthetic clay; and a thixotropic modifier, wherein the thixotropic modifier is selected from sodium silicate, silicic acid, and combinations thereof, wherein the thixotropic modifier is present in an amount of about 0.1% to about 5% by weight of a cementitious material. ### Claim 16 (depends on 15) The cement composition of claim 15, wherein the solid materials are about 10 wt % to about 20 wt % of the total weight of the cement composition. ### Claim 17 (depends on 15) The cement composition of claim 15, wherein the nanoparticles further comprise at least one of nanocarbonate, nanoalumina, and any combination thereof. ### Claim 18 (depends on 15) The cement composition of claim 15, wherein the nanoparticles are present in the amount of about 0.1 to about 5 gal/sack. ### Claim 19 (depends on 15) The cement composition of claim 15, wherein the nanoparticles have a diameter of about 2 to about 100 microns. ### Claim 20 (depends on 15) The cement composition of claim 15, wherein the synthetic clay is present in an amount of 0.1% to about 3.0% by weight of water. ### Claim 21 (depends on 15) The cement composition of claim 15, wherein substantially no natural clay is added to the cement composition. ### Claim 22 (depends on 15) The cement composition of claim 15, wherein the aqueous base fluid comprises at least one of fresh water; brackish water; saltwater; and combinations thereof. ### Claim 23 (depends on 15) The cement composition of claim 15, wherein the aqueous base fluid is present in the cement composition in an amount of from about 20% to about 80% by weight of cement. ### Claim 24 (depends on 15) The cement composition of claim 15, wherein the cement composition further comprises at least one cementitious material selected from the group consisting of Portland cements; gypsum cements; high alumina content cements; slag cements; high magnesia content cements; shale cements; acid/base cements; fly ash cements; zeolite cement systems; kiln dust cement systems; metakaolin; pumice; and combinations thereof. ### Claim 25 (depends on 15) The cement composition of claim 15, further comprising at least one of resins; latex; stabilizers; silica; pozzolans; microspheres; aqueous superabsorbers; viscosifying agents; suspending agents; dispersing agents; salts; accelerants; surfactants; retardants; defoamers; settling-prevention agents; weighting materials; fluid loss control agents; elastomers; vitrified shale; gas migration control additives; formation conditioning agents; and combinations thereof. ### Claim 26 (depends on 15) The cement composition of claim 15, wherein a density of the cement composition before curing is less than about 12 pounds per gallon. ### Claim 27 (depends on 15) The cement composition of claim 15, wherein the thixotropic modifier is present in the amount of about 0.1% to about 150% bwc. ### Claim 28 (depends on 15) The cement composition of claim 15, wherein the nanoparticles are particulate and added in the preparing step as a dry nano-silica powder, and wherein solid materials are about 0 wt % to about 40 wt % of a total weight of the cement composition. ### Claim 29 A wellbore cementing system comprising: a mixing apparatus; an aqueous base fluid; and solid materials comprising a microtine cement; nanoparticles comprising nano-silica; a synthetic clay; and a thixotropic modifier, wherein the thixotropic modifier is selected from sodium silicate, silicic acid, and combinations thereof, wherein the thixotropic modifier is present in an amount of about 0.1% to about 5% by weight of a cementitious material; a conduit connected to a wellbore; a pump connected to the mixing apparatus and the conduit.