STUDY OF THE INFLUENCE OF MECHANICAL CLEANING DEVICE SPIRAL FIN GEOMETRY ON TRANSPORTING CUTTING PROCESS IN HORIZONTAL WELLS AT EXPERIMENTAL SETUP

Abstract

The problems of creating an axial load and clearing cuttings when drilling horizontal wells are considered.The purpose of the work is to study a combined drill string and the geometry of spiral fins of mechanical cleaning devices to achieve optimal load on the bit and clean cuttings when drilling wells with a long horizontal section.Main objectives: study of the influence of spiral fins ofmechanical cleaning devices on the transportation of sludge in the annular space on the developed experimental installation; designing the optimal layout of a combined drill string with mechanical cleaning devices, determining the area of its effective application; conducting a comparative analysis to determine the main advantages of the compiled layout. The use of mechanical cleaning devices has been proposed, in particular the design of a lock-centralizer-turbulator, which makes it possible to improve the cleaning of the horizontal part of the wellbore by turbulizing the flow of the flushing fluid and lifting the cuttings to the region of higher flow rates. An experimental installation was designed, manufactured and put into operation to conduct a study of the processes of transferring load to the bit and cleaning the well from cuttings. Research and comparative analysis of various configurations was carried out according to the nature of their influence on the process ofsludge transportation using an experimental setup. The results of a study on rational spiral fins of a lock-centralizer-turbulator are presented. An optimal combined drilling assembly with mechanical cleaning devices was designed, a comparative analysis was carried out, and the main advantages of the constructed assembly were determined.