Rock breaking model implementation for rigless drilling with robust control of vibration

Abstract

It is an urgent engineering technology requirement for rigless drilling explorers to keep the supporting force of the good wall and prolong the working cycle of the drilling bit, and the reduced rock-cutting strength without rock cracking could ensure the supporting force of the good wall to drilling explorer, and also extend the life of drilling bit. The rock-cracking model with high-voltage liquid discharge is established and simulated so as to obtain the characteristics of rock-cracking. The experimental test further verifies that the presented rock-cracking model of high-voltage liquid discharge can reduce the rock-cutting strength under the condition that the good wall does not collapse.

Keywords

• drilling explorer
• rigless drilling
• rock-cracking
• modeling
• 78-02