INVESTIGATION OF THE IMPACT OF DRILLING WITH SIMULTANEOUS EXPANSION TO THE RATE OF CHANGE IN THE ZENITH ANGLE OF THE WELL

Abstract

The article discusses the use of various methods and techniques for isolating complication zones during drilling in the oil and gas industry. The main focus is on the process of isolating complication zones using profile closures, which allow maintaining the nominal di-ameter of the wellbore. To achieve this, it is necessary to increase the diameter of the complication interval using expanders. The article notes that the highest efficiency is achieved when drilling and expanding the wellbore simultaneously using expandable expanders. Such expanders have high wear resistance and can withstand significant loads. The article also ex-amines the challenges that arise when drillinginclined and directional wells with simultaneous wellbore expansion. One of the main problems is the spontaneous increase in zenith angle when incorporating the expander into the bottom assembly of the drill string. Wells drilled with simultaneous wellbore expansion were an-alyzed. After the analysis, it is evident that when the zenith angle exceeds 300 before the start of expansion, a more intense increase in zenith angle is observed during wellbore expansion. To solve this problem, the use of a managed drill string is proposed, which can adjust the zenith angle with a specified intensity or stabilize it throughout the interval.