DRILLING FLUID FOR DRILLING, STRIP AND TESTING PRODUCTIVE STRATA OF HORIZONTAL AND OBLIQUELY-DIRECTIONAL HOLES

摘要

FIELD: oil production. SUBSTANCE: drilling fluid has carboxymethylcellulose, polyacrylamide or polyethylene oxide, diphonate - a mixture of sodium salts of nitrilotrimethylphosphonic, methyliminodimethylphosphonic, hydroxyethylene diphosphonic, phosphorous and hydrochloric acids and water. EFFECT: enhanced effectiveness of fluid due to increase of its viscous, lubricating, reducing properties and resistivity.