Solutions Engine

Removal of Pipeline Anomalies

For Offshore Pipeline operators, removing pipeline anomalies is a sound business strategy. And for operators of regulated lines, it’s a requirement. Codes often specify that pipeline defects must be removed once they are identified and verified.

TDW provides a variety of services to help pipeline owners and operators maintain a safe pipeline by remediating defects, including:

  • Cleaning with pigs to prepare pipelines prior to repair or replacement.
  • Non-intrusive inline isolation (NII) that enables repair and replacement of pipeline sections without reducing pipeline pressure.
  • Hot tapping and plugging services that are used with bypasses to allow work to proceed at operating pressure during defect removal.

 

STEP 3 / VIEW SOLUTIONS

ADD THIS TO MY REQUEST

Isolation operations are often necessary to facilitate the repair or replacement of a pipeline section. In order to ensure that the isolation tool’s plugging heads seal effectively the first time – reducing turnaround and downtime – it’s essential to clean the pipe walls of wax, debris, sediment, and other materials.

TDW can help Offshore Pipeline operators select and deploy the appropriate pig for the purpose, pipeline, and product.

Pigs for cleaning:

  • OptionALL™ cleaning pig – Effective for cleaning, maintenance, batching, and displacement. Can be customized with attachments appropriate for clearing pipeline solids, including discs, cups, magnets, brushes, and blades.
  • VANTAGE® V cleaning pig – A multi-use pig that can be equipped with brushes to remove hard, crust-like deposits, urethane blades for removing gummy deposits, scraper discs to clean both hard and soft deposits, and magnet kits to remove ferrous material.
  • PitBoss™ cleaning pig – Designed to remove soft to medium-hard deposits from internal pits.
  • FJR/JRN cleaning pig – Equipped with wire brushes and urethane cups to remove contaminants and deposits from pipelines.
  • VANTAGE®+ cleaning pig – Multi-use pigs that can remove hard internal pipe deposits such as mill scale, crust, and calcium deposits as well as thick, soft contaminants including sludge and mud.
  • REDSKIN™ foam pig – Available in five different configurations, including the REDSKIN RoughRider® pig for removing hard deposits.
  • WCK cleaning pig – Built to remove pipeline contaminants and deposits, with an outlet port at the pig’s front end to prevent loosened material from piling up. Available in a dual diameter model for cleaning multiple sizes of pipe in one run.
  • Pencil brush cleaning pig – Heavy duty, aggressive, and effective at removing black powder and cleaning deposits from internal pits. Removable bypass plugs provide jetting action to improve cleaning effectiveness.

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

ADD THIS TO MY REQUEST

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.

ADD THIS TO MY REQUEST

Removing dents, corrosion, or other defects typically requires repairing or replacing entire pipeline sections. TDW provides Offshore Pipeline operators non-intrusive inline isolations using double block and monitor isolation technology that enables work to be done at full line pressure. 

  • 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 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. The SmartTrack system is capable of through-wall communication in any pipeline medium and can operate in pipelines up to 50 millimeters (approximately 2 inches) thick. The system also allows for extremely precise tool positioning, with accuracy of +/- 25 millimeters (approximately 1 inch), depending upon the environment.