«Automation and Informatization of the fuel and energy complex»

Research of interaction of peripheral rims of drill bits roller cones with a well bottom and its wall on the basis of mathematical modeling

UDC: 681.5:622.24
DOI: 10.33285/2782-604X-2022-1(582)-44-48

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russian Federation

Keywords: well drilling, roller cone drill bit, roller cone, slip of the cutting structure, penetration per a tool, calibrating cone, ROP, mathematical modeling

Annotation:

The results of the study of the interaction of the peripheral rims of drill bits roller cutters with a well bottom and wall on the basis of mathematical modeling are presented. The studies carried out made it possible to establish that drill bits equipped with cutters with parallel displaced axes of rotation relative to the tool rotation axis initially work with the formation of an arc-shaped transition zone from the well wall to the well bottom surface. Moreover, the geometry and curvature of the transition zone depend on the maximum diameter of the peripheral rim of the cone and its displacement relative to the bit rotation axis. In addition, the bigger is the maximum diameter of the peripheral rim of the cone and its displacement relative to the bit rotation axis, the greater is the speed of the meeting of the peripheral tooth of the cone’s cutter at the moment it enters into interaction with the destructible rock of the well bottom. Thus, the researches carried out made it possible to reveal that the geometry of the teeth of the peripheral rims of drill bits equipped with displaced cutters relative to the tool rotation axis is not optimal and requires adjustment in order to match its nature of cutting structures interaction with the destroyed rock.

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