MAIN PRODUCTS PRODUCT DESCRIPTION Designed for oil well cementing operations, the stop collar restricts the axial movement of centralizers on casing pipes and withstands high axial forces, serving as a critical cementing accessory for casing strings. Core Models & Features 200 Series Pin-type Stop Collar Hinged design with internal grooves; locking pins wedge the collar firmly in place on the casing. 201 Series Bolt-type Stop Collar Cross-bolt structure enables quick and easy