Introduction
How to choose drill bits for different formations?
For different types of drilling rig equipment, different drill bits are required in production. When choosing a drill bit,
Details
How to choose coal drill bits in different strata?How to choose drill bits for different formations?
For different types of drilling rig equipment, different drill bits are required in production. When choosing a drill bit,
you should pay attention to the following aspects: Shallow well section and deep well section. In order to obtain economic benefits, a drill bit type with a higher mechanical drilling speed should be selected in the shallow well section, and a drill bit with a longer service life should be considered in the deep well section to reduce non-productive time such as tripping. When operating in soft rock with better drillability, the drilling speed is faster, and a four-wing shape drill bit with larger slag discharge volume and higher slag discharge quality needs to be selected; when operating in hard rock, due to the greater strength of the rock, Each column tooth and drill bit need to bear a large amount of load, so it is necessary to choose a drill bit with higher strength for the drill bit body and column teeth; when drilling rocks containing clay, the clay is relatively loose, causing the slag discharge hole to be often blocked phenomenon, you can choose a side-discharge drill bit; when drilling in rocks with relatively good toughness, you can choose a wedge-shaped tooth drill bit to ensure safe production.
