STC tail pipe into the tool

The STC tool is a versatile tool for delivering the hanger to a predetermined depth for seaming, undercutting, 
cementing and expanding the packer after cementing.
Features
1. With the characteristics of the STA into the tool.
2. At the end of the cementing, the sealing block of the expander packer is hidden in the return barrel and 
will not be set in advance.
3. Seals on the lower end of the sealing block are designed to increase the friction between the upper end 
and the upper end of the return barrel. Easy to set packer.
Specifications
A: φ244.5 mm × φ177.8 mm / φ139.7 mm
B: φ177.8 mm × φ127 mm / φ114.3 mm