A BESPOKE WELL DECOMMISSIONING UNIT WITH SIL AND DIVE SPREAD CAPABILITIES
The Well-Safe Guardian is a highly efficient and very experienced Earl & Wright 700 series mid-water Semi-Submersible Unit which has been optimised specifically for Well Decommissioning operations in the UK as part of multi-well, multi-operator well campaigns.
Well-Safe Solutions have applied lessons learned from the execution of over 500 decommissioned wells to ensure the Well-Safe Guardian is the perfect unit to execute all subsea well decommissioning work. Our 5 1/8”, 10Kpsi Subsea Intervention Lubricator (SIL) system is specifically designed to put minimum stress on older wellheads and trees. The on-board 12 person Saturation Diving System (SDS) ensures solutions are found for older hydraulic and manual tree systems and complex decommissioning operations like section milling or casing removal and can be achieved using our 15Kpsi 18 3/4” BOP system. The Well-Safe Guardian is the perfect “one visit” solution to North Sea Well Decommissioning projects.
With the ability to work in water depths to 1500ft, full work class ROV, wellbore fluids handling systems, integrated Section Milling Swarf Recovery, full 15Kpsi cementing and wireline/slickline capability on-board, the Well-Safe Guardian can be deployed to any well decommissioning operation.
After acquiring the Well-Safe Guardian in 2019, Well-Safe put the unit through an extensive overhaul, modernisation and upgrade program in Port of Nigg, Scotland. Specifically, all Special Periodic Survey (SPS) work was completed, a full accommodation replacement carried out and a complete fabric maintenance program executed to ensure complete readiness for the next ten years of offshore operations.
BENEFITS FOR YOU
SUBSEA INTERVENTION LUBRICATOR
Riserless Light Well Intervention System Deployment
The innovative Subsea Intervention Lubricator (SIL) is a product of industry lessons learned on subsea interventions. Using a riserless light well intervention system from a MODU for subsea well decommissioning will eliminate the need for separate intervention vessel campaigns. The SIL will enable fast, low-cost access to subsea wells by providing a fully integrated package of well control barriers and fluid circulation/ injection facilities in a single package.
Improving sustainability by reducing our carbon footprint
Through the efficiency introduced by utilisation of a moored semi-submersible over dynamically positioned vessels, the Well-Safe Guardian will be able to offer significant fuel savings. Furthermore, the reduced duration of operations correlates with lowered fuel usage, benefitting the goal of creating a carbon footprint as small as possible. The onboard diving system and SIL will mean fewer vessels are required across a campaign, substantially reducing the total fuel usage and greenhouse gases created. The Well-Safe Guardian prides itself on being a smarter, more efficient solution to Well P&A.
SATURATION DIVING SYSTEM
Saturation Diving System Operations
Deploying a 12-person saturation diving system from the Well-Safe Guardian eliminates the need for a Dive Support Vessel (DSV). Limiting the number of vessels in-field will help reduce simultaneous operations (SIMOPS) risks and will altogether remove the need for pre-work campaigns with other vessels.
Reducing time and cost by utilising the “one MODU solution”
Dedicated P&A asset: it doesn’t switch between drilling and workover to P&A; it only does P&A. Therefore, the highly skilled crew is focused on the task of well abandonment. Lessons learned are discussed, recorded and immediately implemented, enabling tangible, continuous improvement in operational delivery. Completing full well abandonment with a single vessel in one campaign will yield significant savings from project planning through to execution.
A BESPOKE JACK-UP WELL DECOMMISSIONING UNIT
The Well-Safe Protector is a heavy-duty, harsh environment jack-up with an extensive and enviable operational history in the North Sea dating back to its creation in 1993.
Well-Safe Solutions have applied lessons learned from the execution of over 500 decommissioned wells to ensure the Well-Safe Protector is the perfect unit to execute platform and subsea well decommissioning work up to a water depth of 395ft. The key benefits of the Well-Safe Protector for P&A work include:
- Aft crane capable of 16MT at 121ft making simultaneous operations a standard operation
- Rig owned platform interface system with access via aft hull door to increase platform interfaces with all services available for interface tie-ins (Power, water, air etc)
- Huge available deck space for tubing, casing and conductor to allow batch operations without limitations
- Automated but robust pipe handling to ensure year-round weather tolerance and uptime
- Flexible tree/BOP handling capability with bridge cranes, hi-an mool-pool crane and under cantilever trolley beams to increase efficiency
- Section milling capability “built-in”.
- Rig floor equipment modifications specific to P&A which reduces daily spread rate and POB
After acquiring the Well-Safe Protector in September 2020, the company immediately got to work putting the unit through an upgrade and recertification programme, including a full 5-year Special Periodic Survey (SPS), ready to deploy the unit specifically for enhanced plug and abandonment project in early 2021.