# US 10,767,460 B2 · Method of chemically delaying peroxygen based viscosity reduction reactions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,460 B2 - Document ID: US10767460B2 - Status: Granted - Kind: B2 - Application number: 15/696,379 - Filed: 2017-09-06 - Published: 2017-12-21 - Granted: 2020-09-08 - Earliest claimed: 2014-03-28 - Assignees: Orin Technologies, LLC - Applicants: Orin Technologies, LLC - Inventors: Adam Mohs; Marc Baures; Larry Kinsman - Web page: https://patentgrep.com/patent/US10767460B2 ## CPC - E21B 43/25: Methods for stimulating production {(by vibrating earth formations E21B43/003)} - C09K 8/03: Specific additives for general use in well-drilling compositions - C09K 8/52: Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning - C09K 8/62: Compositions for forming crevices or fractures - C09K 8/50: Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls (compositions for consolidating loose sand or the like around wells C09K8/56) - C09K 2208/26: Gel breakers other than bacteria or enzymes - C09K 2208/28: Friction or drag reducing additives - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A method of time delayed reduction in the molecular weight of polymers in a viscosified fluid and a method of time delayed breaking of viscosified fluids through treatment of the viscosified fluid with a viscosity breaking composition. The viscosity breaking composition is formed from a peroxygen compound, a peroxygen inhibiting agent and a peroxygen catalyzing agent, where the relative concentration of the components determines the duration of the a time interval require for breaking the viscosified fluid. ## Claims ### Claim 1 A time delayed viscosity breaking composition for reducing a molecular weight of polymers in a viscosified fluid, the composition in a first configuration comprising: a stabilized intermediate inhibitor mixture formed from a combination of a first volume of a peroxygen compound, a second volume of a peroxygen inhibiting agent and a third volume of a peroxygen catalyzing agent; the first volume of the peroxygen compound comprising a peroxide; the second volume of the peroxygen inhibiting agent comprising a phosphate, wherein the stabilized intermediate inhibitor mixture is formed of between 0.5% and 10.0% by weight of the second volume of the peroxygen inhibiting agent; the third volume of the peroxygen catalysing agent comprising a ferric methylglycine diacetate; and wherein a relative ratio of the first and second volumes determine a time delay for reducing the molecular weight of polymers in the viscosified fluid after introducing the stabilized intermediate inhibitor mixture into the viscosified fluid. ### Claim 2 (depends on 1) The composition of claim 1, wherein the peroxide is an organic peroxide. ### Claim 3 (depends on 2) The composition of claim 2, wherein the organic peroxide is comprised of hydrogen peroxide. ### Claim 4 (depends on 1) The composition of claim 1, wherein the phosphate is an organophosphate. ### Claim 5 (depends on 1) The composition of claim 1, wherein the phosphate is comprised of phosphoric acid. ### Claim 6 (depends on 1) The composition of claim 1, wherein the stabilized intermediate inhibitor mixture is formed of between 0.1% and 70.0% by weight of the first volume of the peroxygen compound. ### Claim 7 (depends on 1) The composition of claim 1, wherein the time delay for reducing the molecular weight of polymers in the viscosified fluid falls within a range between 1.0 minutes and 2,880 minutes. ### Claim 8 (depends on 1) The composition of claim 1, wherein the relative ratio of the third volumes to a volume of the viscosified fluid determines the time delay for reducing the molecular weight of polymers in the viscosified fluid after introducing the viscosity breaking composition to the viscosified fluid. ### Claim 9 (depends on 8) The composition of claim 8, wherein the peroxygen catalyzing agent is a transition metal. ### Claim 10 (depends on 9) The composition of claim 9, wherein the transition metal is a chelated transition metal. ### Claim 11 (depends on 10) The composition of claim 10, wherein the chelated transition metal comprises iron. ### Claim 12 (depends on 8) The composition of claim 8, comprising between 0.0001% and 5.0% by weight of the third volume of the peroxygen catalyzing agent relative to the volume of the viscosified fluid receiving the viscosity breaking composition. ### Claim 13 A time delayed viscosity breaking composition for reducing a molecular weight of polymers in a viscosified fluid, the composition in a first configuration comprising: a stabilized intermediate inhibitor mixture formed from a combination of a first volume of a peroxygen compound and a second volume of a peroxygen inhibiting agent; the first volume of the peroxygen compound comprising a peroxide; the second volume of the peroxygen inhibiting agent comprising a phosphate, wherein the stabilized intermediate inhibitor mixture is formed of between 0.5% and 10.0% by weight of the second volume of the peroxygen inhibiting agent; and, a third volume of a ferric methylglycine diacetate; and wherein a relative ratio of the first and second volumes and the relative ratio of the third volume to a volume of the viscosified fluid determines a time delay for reducing the molecular weight of polymers in the viscosified fluid after introducing the stabilized intermediate inhibitor mixture into the viscosified fluid.