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

Claim 0:
1. A composition comprising:
(A) a slurry comprising:
(i) between about 5 wt. % and about 60 wt. % of a mixture of oppositely charged acrylamide polymers consisting essentially of:
(a) one or more dry particulate hydratable anionic acrylamide polymers, and
(b) one or more dry particulate hydratable cationic acrylamide polymers, and

(ii) between about 95 wt. % and about 40 wt. % of an oil based carrier, the oil based carrier comprising:
(a) one or more hydrocarbon solvents, and
(b) one or more suspending agents, and

(B) 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 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 mixture of the oppositely charged 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 carrier insulates 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 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.