Eneroil Hinged Spiral Nail Stop can be used in both upset and non-upset casing to provide maximum clearance during rotation. It has a groove in the middle into which a spiral nail can be driven for improved grip on the casing. The broader band firmly grips the collar into position around the casing.
This Hinged Spiral Nail Stop Collar is hinged at two places 180 degrees apart and one spiral nail in each half is driven between collar and the casing.
It tightens the Collar to the casing firmly.
They can be latched on the casing pipe without having to be slipped on at the end of the casing pipe allowing easy installation
These are most effective where low annular clearance is encountered.
Available in sizes 4½" to 13⅜"
Any special sizes or combination can be made available on request