Solutions Engine

Line Modification

TDW employs a full suite of solutions to assess the condition of an operator’s line, isolate a section, and perform modifications without interrupting service.

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

  • Analyze direct and indirect measurements of the pipeline.
  • Perform remediation safely while the line remains in service.
  • Keep lines running safely and efficiently, in compliance with company, industry, and regulatory standards.
  • Review and compare all pipeline data at the dig site.
  • Prioritize repairs of any anomalies in the pipeline.
  • Clean lines before inspection, increasing throughput.




Pigging programs enhance pipeline integrity for Offshore Pipeline operators by cleaning and removing built-up liquids, contaminants, and deposits on the pipe wall and increasing the probability that any pipeline modifications will be completed with no problems. Cleaning pigs prepare pipelines for evaluation and pipeline work, helping to improve data capture and accuracyas part of an integrity inspection, providing the most valuable information possible. 

  • VANTAGE® V cleaning pig Multi-use pig designed to remove both hard, crust-like and soft, gummy deposits, as well as ferrous materials.
  • VANTAGE® V batching pigMulti-use pigs used for batching, displacing, and light cleaning.
  • OptionAll™ batching and cleaning pig Designed for light cleaning, line filling and dewatering, batch separation, and liquid removal.
  • 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.
  • WCK cleaning pigRemoves contaminants and deposits that increase resistance to flow.
  • PitBoss™ cleaning pig Removes soft to medium-hard deposits from internal pits, which is essential to improving the effectiveness of corrosion inhibitors.

 Technical assistance is available from TDW subject matter experts for special circumstances or if the path to a solution requires consultation.


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.


Non-intrusive inline isolation technology makes it possible for Offshore Pipeline operators to safely modife sections of a high-pressure pipeline without the need to bleed down the entire line.

When included as part of an Emergency Pipeline Repair System (EPRS), non-intrusive inline isolation can be executed immediately after catastrophic damage, minimizing environmental and safety fallout.

  • SmartPlug® isolation technology – Double block and monitor (DBM) non-intrusive inline isolation technology from TDW minimizes platform downtime by eliminating or drastically reducing the need to blow down the pipeline segment during repair, minimizing the release of hydrocarbons. This system also makes it possible for hydrostatic testing to take place immediately after isolation, and is tracked, positioned, controlled, and monitored through the SmartTrack™ system.