Beizyk O. Enhancement of the quality of productive reservoir opening (recovery) on the fields of the Precarpathia

The thesis is dedicated to drilling efficiency increasing through improved methods of selecting and adjusting of the undirected BHA parameters based on the actual conditions of their work. The factors that cause deviations between actual and design well path are analyzed. The theoretical study of destabilizing factors effect on the stability of the BHA and experimental study of the zenith angle and axial load effects on the magnitude of the bending moment along the length of unsupported BHA are provided. Research the formula of clayless amylaceous-potassium drilling mud (CAPDM) has been developed. Сarboxylic amylaceous reagent has been received. It is dissolved in water, thermostable and resistant to the fermentation destruction.