Water well drilling rig construction precautions and how to choose drill bits for different bottom l

When the water well drilling rig is under construction, it is necessary to continuously drill, and the non-stop operation work requires a stable production platform, so as to ensure the stable production of the water well drilling rig. The selection of water well drilling rig foundation is particularly important, and the following aspects need to be paid attention to:


 

 1. The foundation groove of the water well drilling rig should be excavated according to the stable slope, especially the formation that is prone to collapse must be dug into a stepped shape to ensure the stable production of the formation.

 

2. When the wellbore

of the water well drilling rig sinks, it is necessary to maintain stable operation, try to prevent the wellbore from tilting and other phenomena, and correct and solve the problem in time.  

 

  3. When the water well drilling rig adopts the drainage method to drill, the water level in the sinking well should drop with the sinking of the wellbore, and generally needs to be controlled at about 0.5-1m below the excavation surface.



 

4. After the well drilling rig is completed, it needs to

drain the operation, which is used to test the production quality of the water well drilling rig, and it is necessary to do a large depth pumping, and the stability of the water level needs to be maintained for about 8 hours, the purpose of this is mainly to ensure the water level and flow rate of the well. 

How drill bits should be selected for different rock formations

Drill bit is one of the important drilling tools in water well drilling rig

drilling, it can be said that without drill bit, water well drilling equipment can not start production normally, which shows the importance of drill bit in water well drilling rig. For different types of water well drilling equipment, different drill bits are needed in production, and water well drilling equipment should pay attention to the following aspects when selecting drill bits:

1. When producing in soft rock with good drillability, the speed of drilling is faster, and it is necessary to choose a large amount of slag discharge and higher slag discharge quality, and it is best to choose a four-wing shape.

2. When produced in hard rock, due to the large strength of the

rock, each column tooth and drill bit needs to bear a large amount of load, so it is necessary to select the drill bit body and column teeth with higher strength.

3. When drilling rocks containing clay, because the clay is relatively rare, the slag discharge hole is often blocked, and the side slag drill bit can be selected.

4. When drilling in rocks with good toughness, you can choose a tooth drill bit to ensure safe production.