# US 2021/0332284 A1 · Strength retrogression mitigation materials for cement compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0332284 A1 - Document ID: US20210332284A1 - Status: Published application - Kind: A1 - Application number: 16/605,781 - Filed: 2018-12-03 - Published: 2021-10-28 - Earliest claimed: 2018-12-03 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: Thomas Jason PISKLAK; Samuel Jason LEWIS; Paul Joseph JONES; William Cecil PEARL, JR.; Stephanie RUIZ - Web page: https://patentgrep.com/patent/US20210332284A1 ## CPC - C04B 20/1066: {Oxides, Hydroxides} - C09K 8/467: containing additives for specific purposes - C04B 20/1077: {Cements, e.g. waterglass} - C04B 28/04: Portland cements - C04B 28/188: {the Ca-silicates being present in the starting mixture} - E21B 33/14: for cementing casings into boreholes - C04B 2111/2084: {Thermal shock resistance} - 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 Cement compositions for use in subterranean wellbores that include a monophase amorphous hydraulic binder material (MAHBM). The MAHBM may include a plurality of particles having a silica core and an amorphous coating substantially surrounding the silica core. The coating may comprise a plurality of amorphous particles, such as α-dicalcium silicate hydrate nanoparticles or microparticles. The MAHBM may be used as a strength retrogression mitigating additive in a cement composition or used as a high temperature cement. ## Claims ### Claim 1 A cement composition for use in a subterranean wellbore comprising: a hydraulic cement; water; and a monophase amorphous hydraulic binder material (MAHBM). ### Claim 2 (depends on 1) The cement composition according to claim 1, wherein the MAHBM is a strength retrogression mitigating additive. ### Claim 3 (depends on 1) The cement composition according to claim 1, wherein the MAHBM comprises a plurality of particles having a silica core and a coating substantially surrounding the silica core, wherein the coating comprises a material selected from the group consisting of amorphous α-dicalcium silicate hydrate (α-C2SH), amorphous tricalcium silicate (C3S), amorphous dicalcium silicate (C2S), amorphous tricalcium aluminate (C3A), amorphous tricalcium silicate hydrate (C3SH), amorphous dicalcium silicate hydrate (C2SH), amorphous tricalcium aluminate hydrate (C3AH), and any combination thereof. ### Claim 4 (depends on 3) The cement composition according to claim 3, wherein the silica core comprises one or more particles of a material selected from the group consisting of crystalline silica, quartz, volcanic glass, diatomaceous earth, fly ash or other silica-based waste materials, bio ash, amorphous silica, and any combination thereof. ### Claim 5 (depends on 3) The cement composition according to claim 3, wherein the coating comprises amorphous α-dicalcium silicate hydrate. ### Claim 6 (depends on 3) The cement composition according to claim 3, wherein the coating comprises a plurality of amorphous α-dicalcium silicate hydrate nanoparticles or microparticles. ### Claim 7 (depends on 3) The cement composition according to claim 3, wherein the silica core is characterized by a particle size of from about 5 μm to about 500 μm. ### Claim 8 (depends on 1) The cement composition according to claim 1, wherein the cement composition comprises from about 5% to about 70% MAHBM by weight. ### Claim 9 (depends on 8) The cement composition according to claim 8, wherein the cement composition further comprises from about 1% to about 70% by weight hydraulic cement and from about 25% to about 80% by weight water. ### Claim 10 (depends on 1) The cement composition according to claim 1, wherein the MAHBM is characterized by an average CaO/SiO2 molar ratio of from about 0.1 to about 1.5. ### Claim 11 A cement composition for use in a subterranean wellbore comprising: a monophase amorphous hydraulic binder material (MAHBM); and water; wherein the MAHBM comprises at least 40% by weight of the cement composition. ### Claim 12 (depends on 11) The cement composition according to claim 11, wherein the cement composition comprises from about 45% to about 65% by weight MAHBM. ### Claim 13 (depends on 11) The cement composition according to claim 11, wherein the MAHBM comprises a plurality of particles having a silica core and a coating substantially surrounding the silica core, wherein the coating comprises a material selected from the group consisting of amorphous α-dicalcium silicate hydrate (α-C2SH), amorphous tricalcium silicate (C3S), amorphous dicalcium silicate (C2S), amorphous tricalcium aluminate (C3A), amorphous tricalcium silicate hydrate (C3SH), amorphous dicalcium silicate hydrate (C2SH), amorphous tricalcium aluminate hydrate (C3AH), and any combination thereof. ### Claim 14 (depends on 13) The cement composition according to claim 13, wherein the silica core has an average particle size of from about 5 μm to about 500 μm; wherein the coating comprises a plurality of amorphous α-dicalcium silicate hydrate nanoparticles or microparticles; and wherein the MAHBM is characterized by an average CaO/SiO2 molar ratio of from about 0.1 to about 1.5. ### Claim 15 A method comprising: providing a cement composition comprising a monophase amorphous hydraulic binder material (MAHBM); and introducing the cement composition into a wellbore. ### Claim 16 (depends on 15) The method according to claim 15, further comprising introducing the cement composition into a portion of the wellbore having a temperature of at least 230° F. ### Claim 17 (depends on 15) The method according to claim 15, further comprising introducing the cement composition into an annulus between a casing and a wall of the wellbore; and allowing the cement composition to set. ### Claim 18 (depends on 15) The method according to claim 15, wherein the cement composition comprises a hydraulic cement and water sufficient to form a slurry, the method further comprising introducing the cement composition into the wellbore using one or more pumps. ### Claim 19 (depends on 15) The method according to claim 15, wherein the MAHBM comprises a plurality of particles having a silica core and a coating substantially surrounding the silica core, wherein the coating comprises a material selected from the group consisting of amorphous α-dicalcium silicate hydrate (α-C2SH), amorphous tricalcium silicate (C3S), amorphous dicalcium silicate (C2S), amorphous tricalcium aluminate (C3A), amorphous tricalcium silicate hydrate (C3SH), amorphous dicalcium silicate hydrate (C2SH), amorphous tricalcium aluminate hydrate (C3AH), and any combination thereof. ### Claim 20 (depends on 15) The method according to claim 15, wherein the MAHBM comprises at least 40% by weight of the cement composition.