Solutions Engine

Leaking Valve

Even under ideal operating conditions and comprehensive maintenance regimens, valves are subjected to significant wear and tear that can cause them to leak, resulting in a cascade of problems. For example, when launcher or receiver valves won’t isolate because they’re leaking, it prevents safe access to pig loading or retrieval and can halt pigging programs. When offshore platform emergency shutdown valves (ESDV) leak, it can create a hazard for the entire pipeline.

TDW helps Offshore Pipeline operators repair and replace leaking valves, mitigating the risks that accompany them.

Services include:

  • Pigging to displace pipeline products so valve repair and replacement can proceed safely and with minimal downtime.
  • Non-intrusive inline isolation that enables repair and replacement of pipeline sections while the system remains in service.
  • Hot tapping and plugging services that allow work to proceed at operating pressure.

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In the high-stakes world of Offshore Pipeline operations, detecting and remediating leaking valves is critical to ensuring pipeline safety and reliability. In order to remove a leaking valve, the product inside the pipeline must often be removed as well. 

Through a full suite of pigging tools that displace liquids and natural gas, TDW can help pipeline operators minimize downtime, economic impact, and risk to people and the environment. 

The TDW line of displacement toolsmost of them equipped with long-lasting, highly effective Real-Seal® urethane cupsincludes:

  • UNISPHERE™ pig – Heavy-duty inflatable sphere that removes liquid hydrocarbons and water from pipelines and piping systems.
  • REDSKIN™ urethane foam pig Tough and abrasion-resistant, used for dewatering, air removal prior to hydrostatic testing, and drying after hydrostatic testing.
  • 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.
  • ULTRA™ pig – All-urethane pig that is capable of batching and displacement.
  • X-Pig® multi-purpose utility tool Flexible and versatile all-urethane pig that can negotiate tight pipeline turns. Appropriate for cleaning, batching, and displacement operations.
  • VANTAGE® + pig Can be used for batching and displacement. Flexible in tight bend pipelines and can traverse a 20 percent reduction in interior pipe diameter.  

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

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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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When a damaged valve can be pigged through and flow is not restricted or stopped, TDW can isolate the pipeline in a pre-determined position at full line pressure. In fact, TDW has performed hundreds of isolations related to Offshore Pipeline valve replacement or remediation with its industry-standard technology. 

  • 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 protects people, assets, and the environment while saving time and money compared to the temporary decommissioning of the entire pipeline. In addition, SmartPlug non-intrusive inline isolation 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. SmartPlug isolation tools are tracked and identified by the SmartTrack™ two-way communication system.