Solutions Engine

Pipeline Deformation

Excessive geometric deformation of the pipe can result in ovality, dents, wrinkles, etc., that can affect the structural integrity of the pipeline.

Through a wide range of products and services (some requiring the pipeline to be piggable), TDW can help Offshore Pipeline operators detect and verify pipeline deformation, assess line integrity, and help execute remedial measures or repairs.

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Sensitive, accurate, and verifiable, high-resolution inline inspection (ILI) technology from TDW detects and locates pipeline anomalies, including pipe wall deformations. Whether needing to inspect new construction or existing pipelines, TDW will help Offshore Pipeline operators comply with regulatory requirements, prioritize repairs, and ensure system integrity while avoiding multiple inspection runs and unnecessary excavations. 

ILI for deformation detection:

  • KALIPER® 360 (K360) technology Engineered to provide deformation detection in newly constructed and in-service pipelines up to 48 inches in diameter.
  • Deformation (DEF) technology – High resolution tool efficiently detects dents and other minute bore reductions, with accuracy to calculate dent strain and prioritize plain dents.
  • Magnetic flux leakage (MFL) – High resolution technology optimized for liquids pipelines detects and sizes volumetric corrosion features such as metal loss in dents.
  • Gas magnetic flux leakage (GMFL) – High resolution technology optimized for natural gas pipelines detects and sizes volumetric corrosion features such as metal loss in dents.
  • Multiple Dataset (MDS) platform Combines multiple technologies to generate comprehensive, critical information in a single tool run. Utilizes all available technologies to detect and prioritize interactive threats associated with dents.
  • XYZ mapping (XYZ) – Supplies highly accurate location information about every defect reported by pairing global positioning system (GPS) coordinates with inertial mapping.

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In the Offshore Pipeline market, risk reduction is of utmost importance. TDW offers safe, proven hot tapping and plugging (HT&P) solutions for a wide array of pipeline defects and maintenance challenges from dents to corrosion to valve failure.

TDW technicians, who have a long track record of successful offshore projects around the globe, ensure that the work entrusted to the company is done efficiently with minimal interruption to product flow.

Whether operators need an emergency pipeline intervention or topside maintenance during a planned shutdown, HT&P offers safe and proven solutions for getting the project completed. The process incorporates a high pressure pipeline fitting, valve, tapping machine, and isolation equipment – all working together to provide a safe and proven isolation solution. Once the area of pipeline that needs work has been safely isolated and evacuated, the line modification can be performed.

TDW isolation technology plays a critical role in this process, and when combined with temporary bypass, it allows repairs to be performed without the need to stop product flow. The STOPPLE® Train Plugging System, for example, uses double block and bleed technology to help increase efficiency and safety during pipeline maintenance and repair. The system – which is able to create a double block and bleed seal through a single fitting – reduces costs associated with fittings, valves, welding, and inspection services. The bleed port affixed on the line ensures that any product that bypasses the first seal is contained and evacuated through the bleed port, which creates a safe zone in high-consequence areas.

Whether operators are purchasing equipment to perform their own HT&P jobs or turning to TDW to execute the service, they can rely on the TDW line of equipment and consumables. The Subsea 1200RC tapping machine, for example, is a topside-driven hot tap machine that can be safely operated down to a depth of 3,000 meters (9842.5 feet). The machine has proven to be a highly reliable shallow and deep-water solution. 

To prepare for future challenges, operators also have the option of creating an Emergency Pipeline Repair System (EPRS), which equips them to take a proactive approach to pipeline emergencies. By working with TDW to create a custom system, operators will have planning and resources in place to repair and recommission their pipelines — and restore product flow — in the shortest time possible.

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Mitigating deformations typically requires repairing or replacing entire pipeline sections. TDW non-intrusive inline isolation technology enables Offshore Pipeline operators to perform pipeline repairs and replacement at full line pressure, without bleeding down the entire system.

  • SmartPlug® isolation technology – The TDW non-intrusive double block and monitor SmartPlug tool is a remotely controlled and operated, non-tethered pipeline isolation system for oil and gas pipelines that enables: Protection of people, asset, and the environment; Cost and time savings compared to the alternative solution of temporary decommissioning of the entire pipeline; Local hydrotesting of the replaced/repaired area without affecting the integrity of the initial isolation, which can be held in place; Production and flow of other lines tied in to the downstream section of the isolated pipeline to continue uninterrupted.