DEVELOPMENT OF ROCK CUTTING TOOL WITH PDC CUTTERS

Abstract

Relevance. When developing a tool for drilling wells for various purposes, the main optimization criteria are the increase in mechanical speed and its resource. This is especially true for rock cutting tools intended for drilling in changing geological conditions of deep and inclined wells. Recently, the issue of increasing versatility and operation time of drilling tools has been increasingly raised. Opportunities in the field of creating artificial materials made it possible to develop modern drilling tools with outstanding characteristics. And the experience of scientific research on the patterns of operation of a drilling tool has shown that the design parameters of the tool affect its performance. By combining production capabilities and the experience of the latest scientific research, a new drilling tool is being developed. At present, the PDC tool is the most sought-after tool. Abnormal wear of the cutting edge of the PDC cutters causes deterioration tool cutting. The possibility of rotation of PDC cutters around its axis creates the conditions for their uniform wear and, as a result, leads to increase in the life of the drilling tool. The aim of the research is to develop a highly resource rock cutting tool. Objects: causes of increased tool wear; tool design parameters with cutters that rotate. Methods: simulation modeling, analytical studies, analysis. Results. Increasing the resource of a rock-cutting tool is possible while ensuring the rotation of the cutters of the PDC. The possibility of placing the maximum number of rotating incisors is achieved by the 45°inclination angle of the bit end surface. This helps achieve the maximum value of the pressing force and the maximum coincidence of the plane of action of recess tool in the well. To ensure the active rotation of the incisors during drilling, the frictional characteristics of their lateral surface should be increased.

Keywords

• rock cutting tool
• pdc cutters
• cutter wear
• cutter slippage
• drilling tools
• resource increase
• cutter torque