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PREPARATORY WORK FOR THE PREPARATION OF HYDROCARBON - BASED DRILLING FLUID

. The article considers the program of replacement of drilling fluid for inter-interval drilling for the technical and operational column of the directional rectilinear interval of an exploration well. The article describes in detail the procedure for replacing the ALKAR-3M drilling fluid with a “Versadril” type hydrocarbon base solution. This work can be used to conduct drilling operations in deep wells in fields with difficult mining and geological conditions, in order to eliminate complications associated with oil seal formation, absorption and accidents with the seizure of drilling tools during drilling.