File:Typical SCMMB (Courtesy of FMC).png
Typical SCMMB (Courtesy of FMC)

The SCMMB is the interface between the SCM and the subsea Christmas tree/manifold valves and remote sensors. It is usually a welded structure, bolted and earth bonded to the frame of a subsea tree or manifold. The vertical face on the side of the SCMMB is the interface with the incoming connections: electrical couplers for power and signals as well as the hydraulic couplers for low-pressure (LP) and high-pressure (HP) supplies. The SCMMB will have course alignment and fine alignment adjustments for locating the SCM. For fine location via a guide pin, the SCM will not land if the orientation is incorrect. For self-aligning SCMs, a central helix will automatically rotate the SCM to the correct orientation before it is able to land.


[1] Society for Underwater Technology, Subsea Production Control, SUT, Subsea Awareness Course, 2008.

[2] B. Laurent, P.S. Jean, L. Robert, First Application of the All-Electric Subsea Production System Implementation of a New Technology, OTC 18819, Offshore Technology Conference, Houston, 2006.

[3] C.P. William, Subsea Control Module, U.S. Patent 6,161,618, 2000.

[4] International Electro-technical Commission, Functional safety of electrical/electronic/ programmable electronic safety-related systems, IEC 61508, 2010.

[5] J. Davalath, H.B. Skeels, S. Corneliussen, Current State of the Art in the Design of Subsea HIPPS Systems, OTC 14183, Offshore Technology Conference, Houston, 2002.

[6] International Organization of Standards, Petroleum and natural gas industries - Design and operation of subsea production Systems - Part 6: Subsea production control systems, ISO 13628, 2000.