Views: 8 Author: Site Editor Publish Time: 2023-03-22 Origin: Site
What is a drill in mining?
Drilling is the process of penetrating through the ground and extracting rocks from various depths beneath the surface for confirming the geology beneath and/or providing samples for chemical analysis.
Why do we drill in mining?
In mining, drilling has two key functions: exploration drilling, used to locate underground minerals and detect faults in surrounding rock, and production drilling, in which blastholes are drilled to aid in excavation and extraction.
How many types of drilling are there in mining?
There are a large number of different types of drilling and this factsheet covers the two basic methods which are most commonly used, rotary drilling and rotary percussive drilling.
The problem of increasing drilling speed.
Prevention and treatment of well collapse, diameter reduction, drilling drop, and other accidents.
Anti-deviation technology.
High-temperature resistance.
Problems of cutting tools in deep well construction.
Therefore, it is necessary to perfect the structure of the large-diameter coal mining drill bits.With the increase of drilling fluid density and well depth, the fluid column pressure exerts a pressure holding effect on the broken cuttings at the bottom of the well, and the broken cuttings from the cone bit are not easy to leave the bottom of the well under the action of differential pressure, resulting in the formation of a cushion at the bottom of the well, reducing the crushing efficiency, etc. Reasonable bit structure will speed up the flow of cuttings in the bottom hole, improve the crushing efficiency, accelerate the drilling speed and shorten the drilling cycle.
As well as improving the life of the roller bit, the service life of the roller has a great impact on the construction cost of drilling well. The life of the roller bit mainly depends on the life of seal, bearing and parent.
HAOQI Mining tricone rock bit is utilized for blasting hole open-pit mining. Depending on the different formations of customers, we can offer different mining drill bits with the sizes ranges from 5 1/2″ to 17 1/2″.
