Coring drilling rig

Abstract

The invention discloses a coring drilling rig. The coring drilling rig comprises a drill rod and an electric pulse drill bit, a coring hole is formed in the center of the drill rod, the electric pulsedrill bit comprises an insulating shell, a high-voltage electrode, a low-voltage electrode, a high-voltage cable, and a low-voltage cable, wherein the insulating shell is fixedly connected to the outer peripheral part of the drill rod in a sleeving mode; the high-voltage electrode and the low-voltage electrode are fixedly arranged on the insulating shell respectively, one of the high-voltage electrode and the low-voltage electrode includes a first ring electrode, the inner diameter of the first ring electrode is less than or equal to the inner diameter of the coring hole, the other one of thehigh-voltage electrode and the low-voltage electrode is arranged on the outer periphery part of the first ring electrode, and the maximum radial dimension of the other one is greater than the outer diameter of the insulating shell; the high-voltage cable and the low-voltage cable are correspondingly connected to the high-voltage electrode and the low-voltage electrode respectively, and the high-voltage cable and the low-voltage cable are used for connecting the positive and negative poles of a power supply respectively. According to the coring drilling rig, the mechanical effects of shock waves, jet flows or plasma channels generated by pulse discharge are utilized to generate cracks on rocks until the rocks are crushed to obtain rock cores, the drill bit does not need to rotate, the drill bit wearing is little, and the coring efficiency is high.

Description

technical field [0001] The present invention relates to the technical field of drilling equipment, and more specifically, relates to a core drilling rig. Background technique [0002] In the process of mineral exploration and development, it is required to carry out drilling work according to the stratum level and depth of the geological design. Core tools, which drill out rock samples to determine various properties of the rock. [0003] At present, the commonly used coring tool is a coring rig, and the coring rig in the prior art usually performs drilling and coring by a rotary drilling method. That is, the mechanical rotation of the drill bit is used to drill the rock, causing impact damage to the rock, so as to take out the broken rock and use it to predict the geological situation. [0004] However, it can be seen that the mechanical rotary drilling method wears a lot on the drill bit, and the drill bit needs to be replaced frequently, which increases the construction...

AI Technical Summary

Problems solved by technology

[0004] However, it can be seen that the mechanical rotary drilling method has great wear on the drill bit, and the drill bit needs to be replaced frequently, which increases the construction period and affects the construction efficiency.

Images