Down hole and offtake pipe inspection

For down hole and offtake pipelines such as risers, casings, caverns, hydrants and so called fingers, Intero Integrity Services offers an effective solution: a precision scan of risk areas. Using highly advanced ultrasonic pigging technology, in combination with a winch, a safe and thorough inspection can be performed to quickly and easily evaluate the operational efficiency of your installation.

What really matters is on the inside.

We provide insightful data for your most difficult to inspect pipelines.

Inspection of risers, casings, caverns, hydrants and fingers will assist in determining the condition of the lines as well as the overall efficiency of the installation. In addition, regular cleaning and inspection of these lines is essential in ensuring compliance with increasingly stringent safety regulations and standards.

Intero Integrity Services’ are the leading experts in non-piggable pipeline solutions. We have been active in the field since the mid-90s and have developed the tools, technologies and equipment to allow inspection of even the most challenging lines. Our specialized down hole pipeline and offtake inspection method, using ultrasonic pigs, allows a fast and complete pipeline assessment that is safe, reliable and yields results instantly.
This innovative solution is available for pipeline with a diameter from 2 inch.

Benefits of down hole inspection

  • Does not require a closed system or pumping facilities
  • Can be used in both filled and non-filled pipelines
  • Immediate evaluation of results
  • Fast and complete inspection
  • Safe and full control of the tool

UT Piglet system

Intero Integrity Services’ world renowned UT Piglet is an online bi-directional corrosion inspection pig. The ultrasound sensor with rotating mirror enables measurements to be taken of the complete circumference of the pipe. The wall thickness, inner radius and distance measurements are monitored online in real-time during the inspection run, via an umbilical cable. This allows the overall condition of the pipeline and the worst defects, to be localized instantly, with all raw ultrasonic data stored for detailed post-processing analysis.

Applied solution

The major advantage of a down hole and offtake pipe inspection is that a closed system is not required. The tool can simply be lowered by gravity or pushed directly into the pipe without the need for time and cost-prohibitive preparations. A wheel suspension unit and/or discs adapted to the width of the pipeline, are used to centralize the tool in the pipe.

In cases where risers can be filled with water, the inspection tool can simply be lowered into the pipe by gravity using a winch assembly..

For non-filled risers the pig is connected to a winch and lowered into the pipe by its own weight. The pig is set up with a seal unit and the bottom section, with the UT measuring head, is filled with water which provides the coupling medium for the ultrasound. To ensure the measuring head is completely covered, water is supplied in a constant low flow, while the sealing unit ensures the rest of the pipeline remains dry.

The umbilical cable connects the ultrasonic electronics inside the tool with the data presentation computer to allow immediate viewing of inspection results in real-time. This means fast decision-making, on-site is possible, while storage of the raw A-scan data allows further investigation and re-evaluation at a later date.