Perphosphate viscosity breakers in well fracture fluids
Polymer mixtures for crosslinked fluids
Pre-treatment methods for polymer-containing fluids
Process and composition to enhance removal of polymer-containing
Process and device for injecting a liquid agent used for treatin
Process for decomposing polysaccharides in alkaline aqueous syst
Process for restoring the permeability of a subterranean formati
Pumpable multiple phase compositions for controlled release...