Before installing the catheter, you should carefully check the tube wall for deformation, leaks in the tube wall, and whether it has good sealing. An “O” sealing ring should be placed and lubricating oil should be placed when lowering the catheter.
Before installing the catheter, we should carefully check the pipe wall for deformation, tube wall for loopholes, whether there is a good seal. The lower catheter should be placed with an "O" seal and greased, etc.
Before installing the conduit, carefully check whether the pipe wall is deformed, whether the pipe wall has leaks and whether it has good sealing performance. Place the "O" sealing ring and apply lubricating oil when running the conduit.