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key advantages

  • Inspections of multi-diameter pipelines and tight bend radii in a single run
  • Optimized mechanical and sensor design to ensure full coverage and complete collection of inspection data in all diameter sections
  • Provides operators with flexibility in new pipeline design and construction, as often found in the offshore industry
  • Modular design of tools allows easy combination with other inspection technologies and physical measurement methods
  • Designed to transverse long Y-pieces or unusual T-pieces
  • Compatible with most launching and receiving facilities
  • Operates at both high and low pipeline operating temperatures
  • Speed control unit means controlled and stabilized tool velocity
  • Provides the possibility to connect several line sections with different diameters via valve bypass for continuous inspections
  • No more need for costly, time-consuming and less accurate alternative methods
  • Detailed reporting and user-friendly assessment software enables easy data visualization and facilitates use of inspection results
  • Industry-leading experience in the inspection of multi-diameter pipelines

The Solution

ROSEN’s multi-diameter ILI tools are capable of highly accurate inspection and thorough asset cleaning. They are compatible with most launching and receiving facilities, highly maneuverable and reliable, and operated and handled in a similar manner to that of conventional ILI tools. To provide full sensor coverage, a collapsible MFL sensor ring system is used to enable adjustment to different pipe conditions for specialized tools. The function of the pull unit is to create the sealing effect required to drive the tool through the pipeline and indeed even through 1.5D and 3D bends. The pull unit has a special cup design to ensure maximum flexibility without losing any sealing effect; it therefore delivers the required pull force at all times during the bend passage. Different diameters in lines inevitably lead to varying differential pressure conditions, which can result in uncontrolled tool acceleration and slowdown. Consequently, to stabilize tool velocity, medium to larger tool sizes are fitted with a speed control unit. All ROSEN multi-diameter tools can be equipped with an XYZ mapping unit and cover a range from 6” to 48”, with a stroke of up to 12” (e.g. 30/42” for the larger sizes.

Service Options

  • Cleaning – operational and pre inspection
  • Speed Control – inspection at high flow rates
  • XYZ – route mapping and strain analysis
  • Combo – multiple inspection technologies in one run
  • Offshore – long distance and high pressure
  • Post ILI – data alignment and combined evaluation
  • Integrity – RBI, FFP, CGA, dent strain and stress analysis
  • NIMA – Asset Integrity Management Software