The TC-DC is a dual coupling tubing hanger with a separate master bushing and compression type pack-off. It is utilized for dual completions with lighter tubing loads. The pack-off seal is actuated by lockdown screws. Once the master bushing is set in position, the tubing strings can be run and pulled independently. Each coupling accepts a back pressure valve profile. Due to the utilization of a separate master bushing, the TC-DC is not capable of utilizing down hole control valves or gas lift mandrels.
The TC-DC is a coupling type dual completion tubing hanger used for light to intermediate weight tubing strings
It utilizes a master bushing that incorporates compression packing
It uses couplings that can be landed or pulled together or independently
Lockdown screws retain the master bushing in position after landing
It can be used in the TCM tubing head with a rotating flange adapter or the TC Tubing head utilizing a single alignment pin
It CANNOT accommodate downhole control valves or gas-lift mandrels in the tubing strings