1、The threaded mandrel hanger is a kind of annular seal that can be completely compressed, and it is driven by the locking screw. Back pressure valve threads are optional.
2、The encircling tubing hanger is an annular seal with high elasticity, allowing tubing string operation while maintaining full control of annular pressure. The threaded mandrel hanger is equipped with an extended neck, a reliable externally excited annular compression seal, and is activated in the tubing head by a retractable locking screw. Equipped with back pressure valve, control line and injection port can be configured.
3、Screw coupler is used together with adapter and tubing hanger. It is a one-piece connection with ACME threads on the outside and back pressure valve threads on the inside.
4、The coupling hanger is used to suspend and seal multiple tubing strings, which can be simultaneously produced or injected from the separated area.
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