Solutions Engine

Main Replacement

If a pipe main cannot be repaired, replacing it without interruption to service is the next best option. From pre-isolation to commissioning, TDW employs a full suite of solutions for pipe main replacement operations.

In the Offshore Pipeline market, TDW services enable pipeline operators to:

  • Analyze direct and indirect measurements of the pipeline.
  • Achieve safe isolation of the pipe joint.
  • Perform replacement safely while the line remains in service.
  • Review and compare all pipeline data at the dig site.
  • Ensure a clean and efficient pipeline for service.

STEP 3 / VIEW SOLUTIONS

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Pigging serves various functions throughout the Offshore Pipeline line replacement process, such as cleaning prior to line isolation to ensure a good seal. And after construction, pigging prepares a new pipe segment for service by removing any materials left behind during construction, including tools, contaminants, and foreign objects from the pipe wall. 

  • VANTAGE® V cleaning pig Designed to remove both hard, crust-like and soft, gummy deposits, as well as ferrous materials.
  • PitBoss™ cleaning pig – Removes soft to medium-hard deposits from internal pits, which is essential to improving the effectiveness of corrosion inhibitors.
  • WCK cleaning pig – Removes contaminants and deposits that increase resistance to flow.
  • REDSKIN™ foam pig – Used for light cleaning; one version incorporates a urethane cleaning wrap with bypass groove that effectively removes paraffin and other soft deposits that could lead to corrosion.
  • V-Jet® corrosion inhibitor pig Sprays corrosion inhibitor onto the hard-to-reach inside top portion of multi-phase gas gathering and transmission lines.
  • OptionAll™ batching pig – Designed for light cleaning, line filling and dewatering, batch separation, and liquid removal.
  • VANTAGE® V batching pig – Used for batching, displacing, and light cleaning,
  • UNISPHERE™ pig – Provides heavy-duty removal of liquid hydrocarbons and water from pipelines and piping systems.

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In the Offshore Pipeline market, safety is of the utmost importance. During planned shutdowns, hot tapping and plugging (HT&P)  technology allows operators to complete topside pipeline replacements and modifications – from making lines piggable to line lowering and relocations – with minimal flow interruption.

The HT&P process incorporates a high pressure 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.

The full suite of isolation solutions by TDW plays a critical role in this process. The STOPPLE® Train Plugging System, for example, uses double block and bleed technology to help increase efficiency and safety during pipeline maintenance and repair. This approach to line isolation, which can 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 captured and evacuated through the bleed port, which creates a safe zone within 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 company’s 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.

TDW also can partner with operators before the work begins, providing consulting services to help them make optimum use of our products and services. The company’s application engineers are recognized industry experts, ready to assist operators through each project phase – from start to finish.

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Replacing a segment of a high-pressure pipeline is made possible through TDW non-intrusive inline isolation technology, which enables Offshore Pipeline operators to carry out replacement while maintaining full line pressure against the isolation tool, without bleeding down the entire system

  • SmartPlug® isolation technology The TDW double block and monitor SmartPlug tool is a remotely controlled and operated, non-tethered pipeline isolation system for oil and gas pipelines. It helps protect people, assets, and the environment while saving time and money compared to the temporary decommissioning of the entire pipeline. In addition, SmartPlug technology enables local hydrotesting of the replaced/repaired area without affecting the integrity of the initial isolation, which can be held in place. The SmartPlug tool also allows production and flow of other lines tied in to the downstream section of the isolated pipeline to continue uninterrupted.