The casing plug has a box thread on one end to recieve the drill rod used and a pin thread on the other end to recieve the casing being driven or pulled.
when ordering specify box thread connection.
The driving shoe is made of heat treated high quality steel and is used to open the hole for the passage of the casing.
When ordering specify whether box or pin connection
The casing shoe normally used for drilling casing through weatherd bedrock or overburden and is,therefore,left on the casing in the hole
Corresponding bit and reaming shell pass through a casing shoe bit.
The casing bit is used to ream the hole for casing access.
It is also used as coring bit with a length of casingas a core barrel.
Corresponding core bit and reaming shell do not pass through a casing bit.