sucker rod Centralizer, sucker rod guide

The sucker rod centralizer is also called sucker rod guide, 
Size: 5/8", 3/4", 7/8", 1", 1-1/8",
Type: wheel centralizer, rod shaped centralizer, twist centralizer.

1. Wheel centralizer: When the sucker rod works the wheel rolls on tubing inside. It can
avoid the sucker rod to rub with the tubing pipe.
2. Rod shaped centralizer: When the sucker rods work, nylon block touches the tubing
inside, it can avoid the sucker rod to rub with the tubing pipe. The nylon block can rotate,
then the rub is even wear. The user only change the nylon block replace rod body, can
save fabrication-cost.
3. Twist centralizer: Cost of it is low, operate easily.