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Pipeline Remediation

Pipeline Remediation

Feb 24, 2018 | Case Study

Cinno2017THwP

Client: Major O&G Operator

Project: Europa 136 W Flowline Remediation

Location: GOM – 3500’

 

Overview

The primary objective of this project was to clear the flowline of an extensive asphaltene blockage to satisfy government decommissioning requirements.

 

Challenges

  • Accessibility to the flowline
    • Blockage was closer to the upstream/PLET end of the flowline
    • PLET is in almost 4,000ft of water
    • Decided to lift flowline to surface for surface injection of CT to reduce total distance to blockage
  • The raised flowline would require…
    • Lifting/threading through the moonpool of the vessel
    • An adequate hang-off structure to support the catenary weight (plus safety factors).  A custom moonpool bridging system was designed & built by NAS for this portion of the solution
    • Change-out of interface once recovered to allow for CT injection
    • Additional structure to support rig-up of a BOP & injector system and allow for safe workspace around the equipment
  • Full extent of blockage was unknown
  • Flowline was to be flushed for cleanliness after blockage remediation which required service vessels at the TLP and the PLET
  • Large quantities of solvent would be needed for the job
  • Expected volume of returns from the flowline would required a large capacity of hazardous material storage and offloading to another vessel while on-site
  • The downstream side of the flowline (on the TLP) required a temporary interface to the riser, and nitrogen packing & water flushing systems
    • The nitrogen packing was to provide positive indication of breakthrough on the solid blockage
    • The water pumping system was to flush the remediated flowline to regulatory cleanliness standards for decommissioning
    • There is only enough room on the platform for the temporary system which directly interfaced with the riser, all other systems were deployed on a PSV with a flexible hose connecting the systems on the TLP and the system on the PSV

 

Client Solution

  • The flowline was safely recovered & secured, and the interface was changed for intervention
  • The downstream (-of the blockage) end of the flowline was packed with nitrogen
  • Asphalatenes blocking the flowline were removed (NOTE: not all were removed due to the extensive conditions.  The client decided to cease intervention after an approved period of time, and demobilize.  This was to no fault of CI, and our solution was still deemed a success…just applied to worse conditions than the client expected to encounter)
  • The Island Venture was on charter to Shell for 26.16 days.  However, the preparation for this project began months in advance.
  • C-Innovation Subsea Projects Group—project management, engineering, offshore management, logistics, client relations/interface
  • ECO MSV Island Venture – primary intervention services
  • ECO PSV (C-Captain) for platform services—i.e., nitrogen & water pumping
  • ECO PSVs (Robin & Ms. Charlotte) for offloading & storage of returns
  • C-Innovation UHD-311 and -312 for ROV support services
  • NAS naval architecture design-build services
  • Bollinger for sea-fastening implements
  • Halliburton Coiled Tubing
  • Halliburton BOP services
  • Halliburton Pumping
  • Halliburton for platform interface
  • Halliburton Nitrogen Generation
  • PTS separation systems
  • Acute Welding Services for pipeline cuts & interface change-out

 

Why were these services chosen?

Skilled, integrated team that brought effective one-stop-shop solution to client

 

How is it unique/different from other similar company/industry-wide projects?

We lifted a pipeline off of the seabed, threaded it through the moonpool of vessel, and supported it for weeks while a surface intervention was performed.  This is unheard of.  The job was deemed impossible.  C-Innovation Subsea Projects & Team Venture was the only party brave enough to provide a viable solution for the client’s challenge.

 

Results

The client is sole-sourcing a phase 2 solution through us to complete the work scope.  More engineering, more planning, more services.  We’re going to get that pipeline off of the seabed for them safely and without impact to the environment.

We are solidifying our status as a serious, competent solution provide in the industry.

The client was so pleased with our performance that we are being offered opportunity to additional, diverse work from them—effectively winning share of a rather closed market.

C-Innovation Signs Two-year Deal with BP for IMR Vessel

Feb 22, 2018 | News

Cinno2017THwP

Island Enforcer

Mandeville, Louisiana-based C-Innovation (C-I) has signed a two-year master services agreement with call-off options with BP for inspection, maintenance and repair (IMR) services for the M/V Island Enforcer, a 401-ft. subsea installation and construction vessel. The vessel was delivered in 2010 from the Bergen Group in Norway to Island Offshore, a joint venture between the Ulstein family of Norway and the Chouest family of Louisiana.

According to C-I, the agreement is an all-inclusive contract including vessel, ROV, survey, engineering and project management. “Initial work will commence immediately with the installation of two production jumpers and EFLs at BP’s Atlantis field in 6,500 fsw,” said Richard Bourque, C-I’s General Manager.

Serving a global customer base, C-I provides a wide range of ROV services, including subsea construction, field development, engineering and project management.

>>View the details of this project

C-Innovation Announces Formation of Subsea Projects Group

Jan 10, 2018 | News

Cinno2017THwP

C-Innovation, LLC (C-I), an affiliate of Edison Chouest Offshore (ECO) and its family of companies, has announced the formation of a turnkey subsea projects group. Capable of providing a complete solution to its global customer base without having to venture outside the diverse and large family of Chouest companies worldwide, the new group is based in the heart of the energy corridor in ECO’s Houston, TX office.

“This represents a significant milestone for C-I, and it helps solidify our reputation as a true turnkey provider of subsea services with the backing and support of the diverse family of companies within the ECO group,” said David Sheetz, Manager of C-I’s Subsea Division.

Sheetz said that the vertical integration amongst the vast network of Chouest affiliate companies provides a fully-integrated subsea solution for any complex project for customers. This grouping of diverse services provides overall savings to the customer and allows for efficient cradle-to-grave control of projects in the current tight market. “We are highly knowledgeable in all aspects of subsea field engineering and design,” said Sheetz. “We know how to get components to the sea floor and lay them out logically and efficiently to achieve the greatest result for the customer.”

C-I’s in-house project management team provides engineering support, procedure development and review, project execution and final reporting requirements. And with access to ECO’s vast industry-leading inventory of mission-specific vessels, it provides greater flexibility in matching and scheduling of assets, and ultimately, savings to the customer.

Additionally, the diverse group of companies also includes Chouest’s various port facilities, logistics company, tank cleaning services, shipyards and dry-docks, all located throughout the U.S. Gulf Coast and Brazil. With corporate headquarters in Mandeville, LA, C-I’s advanced ROV capabilities provide a broad spectrum of support to subsea construction projects, as well as drilling, intervention, maintenance and heavy lift assignments. C-I was founded in 2007 to meet the growing demand for advanced ROV operations in the Gulf of Mexico. It began expanding into a highly diversified subsea construction group in 2010 supporting major marine oil and gas operators worldwide.