Subsea & Ultra-Deep Water Pipeline Services
The First Ultra-Deep Water Hydrate Remediation System with
State-of-the-Art
Subsea Skid, Pump & Gas Separator
WWCS performed a hydrate remediation in the Gulf of Mexico at 7,200’ water depth from a proprietary skid containing a pump and motor. This self-contained subsea unit is powered from the surface through coiled tubing from a Multi-Service Vessel (MSV). Not limited by a Remotely Operated Vehicle’s (ROV) hydraulic energy, the subsea pump can increase volume up to 1 bpm, or reverse flow drawing pressure down to a sub-ambient -12 psi. For this project the integrated skid cleared 15 miles of 12” pipeline removing 9,000 barrels of hydrocarbons, condensate, gases and other fluids.
For a subsequent job, a paraffin and asphaltene blockage mixed with hydrates was successfully mitigated reopening four miles of pipeline. To date the skid has cleared a total of 30 miles of pipeline.
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Shallow and Inland-Water CapabilitiesThe WWCS Hydrate Remediation System is also the solution of choice for shallow and inland-water pipelines. Depending on the water depth, the skid can clear pipelines with diver assistance or be directly operated from the surface. |
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WWCS Gas Separator - Engineered to Prevent Hydrate Blockages within the Skid and its Coiled TubingA unique WWCS gas separator sits atop the skid and removes the gas mixed in the hydrate to the surface. This approach prevents the formation of additional hydrates in the coiled tubing outtakes used by both the gas separator and the pump for the remaining fluids. The old technique required returning the coiled tubing to the surface for thawing each time hydrates formed and reconnecting to the subsea pump–causing costly delays. This system is further protected from hydrate blockages between the pipeline end termination/flowline end termination and the skid by injecting dispersant chemicals from a ROV panel as needed. |
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Engineered by WWCS to Ensure SafetyWWCS has engineered in a triple-redundant safety system to compensate for a loss of dynamic positioning (DP) or drive-off by the MSV from which the hydrate skid is deployed. An emergency quick disconnect (EQD) removes the skid’s coiled tubing connections via four hot stabs. Accumulators provide an isolated source of hydraulic power for the EQD which can be activated acoustically from the vessel, with ROV manipulators, or as a last resort with wire ropes. This safety system eliminates potential damage to the pipeline asset from the hydrate skid dragging across the seabed or thousands of feet of coiled tubing crashing down on the remediation site. |
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Engineered by WWCS to Protect the EnvironmentThe skid has a number of environmentally friendly features. The pump is powered by filtered sea water avoiding any adverse impact from leaking or severing of the coiled tubing. The fluids the hydrate pump sends to the surface are contained in a specially designed tank on the deck of the MSV. Lastly, in the event of a MSV drive-off or loss of DP, emergency shut-off valves minimize the release of any hydrocarbons from the coiled tubing outtakes after an EQD. WWCS is currently developing a flush loop to eliminate any hydrocarbon release from an EQD deployment. |
Read the Offshore Magazine article about the WWCS Hydrate Remediation System
View presentations of the WWCS Hydrate Remediation System from the Deepwater Intervention Forum and Subsea Tieback Conferences
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View a video of the WWCS Hydrate Remediation Skid deployed at surface
View a video of the WWCS Gas Separator deployed at surface
View a video of the WWCS Hydrate Remediation System deployed subsea
Also, ask a WWCS sales rep about equipment rentals.
For Offshore Wireline, Electric Line, and Slickline Services, call the WWCS Business Office at 281-446-0273 or email us for more information.
Technology Breakthroughs &
One-of-a-Kind Equipment
Wright’s Well Control Services (WWCS) engineers and executes numerous first-to-market services for clients. Ask the expert team at Wright’s about customized solutions for the most challenging offshore environments in the Gulf of Mexico (GOM) and beyond.
