Patent ID: 11905462
Assignee: PFP INDUSTRIES LLC
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 10:
11. A slurry composition comprising:
(A) a first slurry comprising:
(i) between about 5 wt. % and about 60 wt. % of one or more dry particulate hydratable anionic polymers, and
(ii) between about 95 wt. % and about 40 wt. % of a first oil based carrier, the first oil based carrier comprising:
(a) one or more hydrocarbon solvents, and
(b) one or more suspending agents,

(B) a second slurry comprising:
(i) between about 5 wt. % and about 60 wt. % of one or more dry particulate hydratable cationic polymers, and
(ii) between about 95 wt. % and about 40 wt. % of a second oil based carrier, the second oil based carrier comprising:
(a) one or more hydrocarbon solvents, and
(b) one or more suspending agents, and

(C) a water composition comprising an effective ion concentration comprising:
(i) between about 25,000 ppm (2.5 wt. %) and about 250,000 ppm (25 wt. %) of one or more monovalent ions, and
(ii) between about 10,000 ppm (1.0 wt. %) and 30,000 ppm (3 wt. %) of one or more polyvalent ions, and
(iii) having a ratio of monovalent ions to polyvalent ions between about 10:1 and about 2:1 to form a downhole fluid,

wherein the one or more dry particulate hydratable anionic polymers and the one or more dry particulate hydratable cationic polymers consist essentially of one or more dry particulate hydratable anionic acrylamide polymers and one or more dry particulate hydratable cationic acrylamide polymers,
wherein the effective ion concentration is sufficient to reduce gelling interactions between the one or more dry particulate hydratable anionic acrylamide polymers and the one or more dry particulate hydratable cationic acrylamide polymers during hydration by the water composition,
wherein the one or more dry particulate hydratable anionic acrylamide polymers and the one or more dry particulate hydratable cationic acrylamide polymers have % drag reduction values within 10% compared to % drag reduction values of compositions including only cationic acrylamide polymers over a 10 minute period of time,
wherein the first and second oil based carriers insulate the one or more dry particulate hydratable cationic acrylamide polymers and/or the one or more dry particulate hydratable anionic acrylamide polymers from moisture, and
wherein the first slurry and the second slurry reduces clumping of the one or more dry particulate hydratable cationic acrylamide polymers and/or the one or more dry particulate hydratable anionic acrylamide polymers when added into the water composition.