Stop collar (clamps, positioners) are also called stop rings, stop rings, braking rings, etc. They can be installed at any position on the casing to limit the axial movement of the centralizer or cement umbrella on the inner casing. Slide to ensure that the centralizer or cement umbrella is in the designed position. There are three structures: top screw type, fixed screw type and buckle type. There are hinge type and sliding sleeve type. The size ranges from 4-1/2” to 20”, and can be processed according to the required size.
