Undersea wellhead with cutoff facilities - for production drilling and test drilling

摘要

Connector is provided for two lines guided from the drilling platform and leading to the surface. One line is connected to ball twist valve via the connector and two concentric pipes forming a double riser. The valve closes the riser, and the space between the outer pipe and the casing can be sealed off by a preventer. The connector and lines are linked by combined snap home and screw fittings, and the lines are steered towards the connector by a guide system.