What should be paid attention to when using a centralizer?

The centralizer is strictly prohibited from bumping and raining during loading, unloading and transportation;
When in use, hit the back wrench on the square of the sucker rod, tighten the pipe wrench on the flat body below the centralizer, and hit the back wrench on the coupling of the centralizer (that is, the three-tooth ring), Tighten the pipe wrench on the cube of the sucker rod to ensure that the centralizer is not deformed;
Sucker rod guide must be installed;
In the oil well of the old tubing, the old tubing pin thread must be chambered with 45°;
Be stable when devolving.