Mono Column Platform (MCP)

The MCP is a multipurpose and high payload jack-up rig. It comprises a deck box, 4-chord square truss structure (Mono-Column) and a mat foundation. The MCP is designed to specifically address the conundrum relating to marginal fields, as well as the challenges associated with early monetization of oil fields. Furthermore, with mat design, the MCP can operate in oil fields with soft seabeds which are challenging for conventional jack-up rigs. The MCP is also capable of operating in harsh environments.

Concept & Application

The MCP is an offshore mobile platform, flexibly fitted with modular facilities which results in minimum downtime for the end user. These modular facilities can be installed either individually or in combinations to suit the end user’s needs and requirements, e.g. drilling, production, accommodation and ancillary support system. The MCP boasts an impressive operational capability up to 500 feet water depth, supports high Variable Deck Load (VDL), with an enormous deck space.

Intellectual Property and Classification

The MCP Design is conceptualized by Brian Chang & Peter William Nimmo and wholly owned by Calm Oceans Pte Ltd. The MCP is classed with ABS and adheres to MOU Code 2008 and other relevant IMO guidelines.

The enormous deck space and the high VDL capacity facilitate individual or combination of modular facilities to be installed. This enables an array of projects and activities to be carried out simultaneously.

Enormous Deck Space sized to meet project requirement

Our wide range of options to meet your need


The MCP because of its Mat foundation does not run the risk of a punch-through which could occur with conventional three-legged/four-legged Jack-Up rigs.

As the Mat foundation sits firmly on the seabed, whether hard or soft, it provides stability to the MCP with the installed modular facilities.

MCP can be easily re-deployed

During commissioning, the MCP can easily be deployed with no requirement for preloads. This advantage applies even when the MCP is deployed on soft seabeds – a capability unique to the MCP. During decommissioning, the Mat foundation can be easily jacked up and the MCP can be efficiently relocated to a different site with minimal operational risks.


From field development perspective, additional MCPs can be configured and seamlessly deployed for an array of activities such as drilling, production, accommodation and field support activities.

24680,000 bpd & 5101520,000 MT VDL

Each MCP can carry enormous VDL, depending on the design of the MCP for the project. Where required, additional MCPs of the same VDL capability can be deployed together to scale up the VDL capacity, as required by the project.

For example, 4 MCPs each with production capacity of 20,000bpd can be deployed together to provide up to 80,000bpd if need be.


1) What is a MCP? What is CO-101?

MCP stands for Mono Column Platform, a jack up design co-developed by Brian Chang and Peter William Nimmo. Calm Ocean 101 (CO-101) is the first MCP jack up that we are currently building on speculation and unit will be ready in Q4-2014. Refer to CO-101 brochure for specifications.


2) Is she a new design and has it been proven?

She is a new design with re-arrangement and enhancement of current proven technologies. Mat supported jack-up rigs have experienced more than 176 rig years of successful operations to date in more than 1700 locations with wide variety of environments. This experience has included water depths up to 259 feet, and bottom conditions encompassing very soft muds, sands and coral rock. The MCP is a combination of a fixed jacket, a square truss leg, mat foundation and jacking system into one. The 1st MCP, Calm Ocean 101 will be capable to operate in water depth up to 500 feet. Depending on final usage she will be outfitted with modular equipment to serve her contract.

3) A bare deck?

We are essentially providing a piece offshore real estate that will serve our clients needs. The bare deck with modular topside equipment will offer our clients the flexibility to interchange and configure her for different functions during the course of her life. The bare deck can be outfitted for drilling, production, drilling & production, accommodation, decommissioning, power generation and etcs.

4) Capabilities of the MCP?

The design is scalable. Like a Lego kit, we can customize the unit up to 500 feet water depth, accommodate specific payload and cater adequate deck space for the specific use.

5) Is the MCP design verified and approved by any class society?

American Bureau Society (ABS) Singapore is reviewing our design calculations. CO-101 will be classed by ABS to Mobile Offshore Unit (MOU).

6) Where is the area of operation for such unit?

The CO-101 is capable to operate in soft seabed environment in 30 feet water depth to 500 feet water depth in hard seabed. The MCP design is also good for areas with significant wave height, the CO-101 can withstand up to 29m tall waves at 400 feet water depth and 22m tall waves at 500 feet water depth.

7) Will it have any stability issues or leg fatigue issues during ocean and field tow?

Floating stability will meet ABS rules for intact and damaged stability. Fatigue issue is less compared typical independent leg jack up. This will be evaluated case-by-case basis depending on environmental conditions.

8) What is the maximum load you can have on the deck box?

For CO-101, we can accommodate 5,000MT payload. Subsequent unit we can cater for accordingly.

9) Can cranes be installed on the deck box? What is the maximum capacity?

50-70MT cranes are in principle not an issue. Anything larger than this, we will review and design on a case-by-case basis.

10) Will the mat foundation have any walking issue or overturning issues? Do you have any skirting?

The unit will stay on locations because in cohesive soils the skirts will prevent the rig from sliding and for granular soil the sliding is resisted primarily by friction. Skirts will be custom designed but for general applications the skirts will be 600 mm deep and form a grillage on the bottom of the mat. Overturning is resisted because we have a spread mat, which distributes the load over a significant area.

11) What type of seabed and levelness does the mat foundation requires?

Mat foundation rigs have safely work with bottom slope up to 1 degree. In undulating hard seabed, seabed preparation may be required.

12) As a accommodation unit, how many people can you accommodate?

The CO-101 (less the center hole area) has a deck space of 3200 sq. m. We will work with accommodation suppliers to cater for the client’s accommodation requirements. With 3200 sq. m. we can easily house more than 500 men accommodation with full facilities and still have plenty of space left for other purposes.

13) How do you configure the MCP for drilling?

Drilling can be done through a slot in the mat & deck or through the leg with a tender/platform rig. Alternatively a modular drilling package can be installed on the MCP.

14) When you are drilling through the center of the leg, do you have to jack up all the way to the top in order for the drill floor to skid over it?

Yes if you are drilling through the leg she need to be jack all the way up and skid the drillfloor over the leg center. We will deliver the unit to the water depth the client is operating in. In the scenario the client is planning to drill and produce from a field for 10 years and want to relocate the MCP to another field with deeper water depth, we will take the MCP to the shipyard adjust the leg to the required water depth.

15) Are there thrusters underneath the mat? If no, how do you transport the MCP?

No, there are no thrusters. The MCP will be dry-towed for long distance and position with tug vessels.

16) Can the MCP store oil?

We may develop it in future; mat storage is a proven technology and used in numerous offshore fields today.

17) Advantages of MCP design over independent jack up design?

– The MCP can be modified to suit the requirements during her lifetime.

– With a large open deck space, the MCP accommodate drilling and production at the same time.

– No ballast tanks are required for preload hence such tanks can be used for other fluid storage.

– With a large deck space (on the CO-101 up to 4,200 sq. m.), most equipment can be installed on deck. Maintenance and change out of equipment can be easily accessible.



Find MCP suitable for your project?

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