Hinged Bolted Stop Collar is made to latch-on to the casing without having to be slipped over the end of the casing which helps fast and easy installation. No markings or indentations are produced on the casing after installation.
In this design a nut and bolt when tightened draws the stop collar into a friction grip around the circumference of the pipe. The holding force of the Bolted Stop collar is higher than the allowable centralizer starting force.
Hinged Spiral Nail Stop Collar is designed with two spiral locking pins which, when driven in firmly, stop the collar at required position around the casing. Holding force meets, or exceeds API specification.
As per different sizes either 2 or more locking pins are to lock the collar into position. Like sizes less than 13 3/8” use 2 spiral locking nails and sizes 13 3/8” and greater use 4 spiral locking nails.
Hinged Set Screw Stop Collar are designed with two pieces and hinged at the two ends which makes 180 degree angle in between them. One of the row of Set Screw apply the gripping force which tightens the collar to the casing firmly.
They can be fastened on to the casing pipe and much easy to install. They are most effective in low annual clearance conditions. To prevent it from getting rust, a special iron phosphate coating is applied on these collars.
A single piece collar that uses set screws to induce the gripping force. Used where high axial loads are expected and effective where low annular clearance is encountered.
Slip-on Set Screw Stop Collar are designed for use where higher holding forces are required. Easily slides onto casing, making installing the stop collar incredibly easy, using an Allen wrench.
Wire Bristle Scratcher is designed with a hinged collar and wire bristles are attached to it. The use of wire scratcher improves the bonding of the cement between the porous formation and the casing.
Hinge pins are used to stop the collars firmly around the casing. On the other hand, the wire bristles are hardened and tempered.
Wellbore Wipers are used to clean the well bore efficiently so that removed filter cake can be passed thereby providing excellent reinforcement to the cement column especially under close spacing.
These wipers are made up of loop wire cables of tempered steel laced into a collar. The overlapping high-alloy cable is interlaced with a full 360 degrees around the band.
