METHODOLOGY OF USING THE 'TRADEOFF CRITERION' FOR SELECTING OPTIMUM DRILLING PRACTICES AND ANALYSIS OF EFFECTS OF DRILLING EQUIPMENT DOWNTIME ON DRILLING SPEED PER RUN
The article reviews traditional methods of evaluating efficiency of various drilling practices using practical examples and discusses advantages and disadvantages of the traditional methods. It is proposed that a new combined criterion (called 'trade-off criterion') can be used during the design stage and in the course of real-time control over drilling to select optimum drilling variant for benign deepening of a borehole. The article also analyzes effects of well downtime on the adjusted drilling speed per run.