Throwing size: according to the diameter of the oil well and the expected plugging position, select the appropriate throwing size. Generally speaking, the middle diameter should be slightly larger than the inner diameter of the oil well to ensure the setting effect.
Pipe laying material: Select suitable materials according to the oil well conditions and plugging requirements, such as steel balls and rubber balls. Steel balls are suitable for high-pressure oil wells and rubber balls are suitable for low-pressure oil wells.