Kroff Chemical Company

Nabors Completion & Production Services Co.

David Grottenthaler

Paul Rey

Susan Rey

Matthew Eric Blauch

Michael John Seyman

Fluid treatment systems and compositions are provided including (a) at least one material including (1) at least one carboxylic acid functional group and (2) at least one sulfur-containing group selected from the group consisting of sulfonyl functional groups, sulfonate functional groups and mixtures thereof; and (b) at least one scale control agent. The fluid treatment systems and compositions can be used to treat aqueous systems, for example as fracturing fluids for treating aqueous compositions found in subterranean formations. Methods for inhibiting formation and/or precipitation of calcium salts in an aqueous composition using the fluid treatment systems or compositions also are provided.

Fluid treatment systems, compositions and methods for metal ion stabilization in aqueous solutions

Methods of treating flowback water from a subterranean formation penetrated by a well bore are provided, comprising: (a) providing remediated flowback water having a ferrous iron (Fe) ion concentration of less than about 100 milligrams of ferrous iron ion per liter of flowback water, a barium ion (Ba) concentration of less than about 500 milligrams of barium ion per liter of flowback water, and a calcium ion (Ca) concentration of at least about 1,000 milligrams of calcium ion per liter of remediated flowback water; and (b) treating the flowback water with: (i) at least one friction reducing agent; and (ii) at least one scale formation inhibiting agent and/or at least one iron precipitation control agent to provide treated flowback water which can be reused as fracturing fluid in a well drilling operation.

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McDonald, PA, United States of America

David Grottenthaler