COMPOSITION PREVENTING SEDIMENTATION OF NON-ORGANIC SALTS AT EXTRACTION OF OIL AND GAS FROM WELLS Russian patent published in 2011 - IPC C09K8/74 

FIELD: oil and gas production.

SUBSTANCE: composition for prevention of sedimentation of non-organic salts at extraction of oil and gas from wells of carbonate and terrigenous beds contains water, hydrochloric acid of fluoro-organic production - rejects of fluoro-organic production containing to 25-30 wt % of hydrogen chloride and to 4-6 wt % of hydrogen fluoride and reject of production of phosphonic-methyl-glycine of composition wt %: ammonia chloride 4-5, sodium chloride 4-5, phosphonic-methyl-glycine 2-2.5, bi-phosphonic-methyl-glycine 1-1.5, phosphonic-methyl-iminodi-acetic acid 1-1.5, beta-chlor-propionic acid to 5, water - the rest at the following ratio of components, wt %: hydrochloric acid of fluoro-organic productions 12-15, rejects of phosphonic-methyl-glycine production 10-14, water - the rest.

EFFECT: avoiding application of scarce expensive reagents, increased payout of bed, increased service life of equipment due to reduced corrosion activity of applied composition, utilisation of phosphonic-methyl-glycine production reject.

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