DOCKING MANIFOLD

Overview. The Docking-Manifold (KeyMAN)contains the interconnecting pipework flanged for use with the pipe/flowline connection system and the lower interface hubs of the multibored wellhead connectors.

Double block isolation valves are used below the wellhead connector hubs and are operated by standard Xmas tree type ROV interfaces. No remote actuated valves are required or their associated controls, (i.e., only static pipework and "manually" operated isolation valves are contained in the Docking-Manifold).

The Support Structure and the Docking-Manifold can be installed in advance while the System-Modules are being manufactured and tested onshore.

 MATE Connector. The MATE connector is under development for future systems and will enable more bores than a conventional 18-5/8" wellhead connector will allow. Moreover it will also remove the requirement for separate isolation valves in the Docking-Manifold.

The MATE connector is a multiple bored connector that allows simultaneous connection or disconnection of up to six 8-inch or disconnection of up to six 8-inch and four 4-inch lines. Both halves of the connector (upper and lower manifolds) have internal AB3 valves to contain process fluids when the connector is separated.

All operations required for clamping and sealing the upper and lower manifolds together are carried out in one continuous operation via a series of subsea hydraulic double acting cylinders. This hydraulic power may be supplied by an ROV.

The future advantages of using the MATE Connector instead of a wellhead type connector include, inter alia:

•Increased efficiency in the performance of well testing;

•Additional equipment being contained within the System-Modules rather than forming part of the manifold further enhancing the system modular benefits; and

•Lighter weight design due to removal of separate double block isolation valves as required with wellhead type connectors.