The two piece, top entry system is used where a tubing adapter (bonnet) is not required. It consists of a 90-degree upper connector and a lower connector.

The lower connector bolts to the bottom of the tubing hanger and the upper connector bolts to the top of the tubing hanger. The connection between the two connectors is made within the electrical connection port of the tubing hanger. In this configuration, the tubing hanger remains exposed in the top of the tubing head spool.

To convert existing wellheads to the two piece, top entry system, a tubing hanger change out is required.