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Abstract

The trouble-free process of drilling wells largely depends on the effective cleaning of the borehole. The formation of a slurry regime at the bottom of the well leads to the process of repeated crushing of drilling fines, which in turn leads to a decrease in the mechanical drilling speed, to an increase in the energy consumption of the rock-crushing tool for repeated crushing, and also increases the risk of oil seals. In addition, the formation of a slurry regime at the bottom of the well increases the intensity of abrasive wear of the drilling rig. This article provides a theoretical description of the motion of a particle of drilled rock, proving the need for an external force to guide the particle to the surface. An improved design of a three-ball chisel is described, which makes it possible to create a vortex flow of slurry when the chisel rotates in the bottom, maximally directing particles from under the rock-crushing tool to the walls of the well. The article also describes the design of the developed swirl, which accelerates the flow of the washing solution to the upper part of the drilling rig, preventing sludge deposition and stuffing box formation in the drill string. An experimental study of the proposed technical solutions is described, as a result of which the rational bending angles of the chisel foot, the number and bending angles of the swirl screws are determined. An analytical analysis of experimental studies shows that the use of the developed drilling rig, which increases the efficiency of downhole flushing, will improve the efficiency of the drilling process by preventing the formation of a slurry regime at the bottom of the well, increasing the mechanical drilling speed, as well as reducing the power consumption of the drilling rotary motor and pump.

First Page

23

Last Page

29

References

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