Operators are forced to face a variety of complex challenges within pipeline networks, especially those relating to inline inspection. Typical challenges include mechanical design, operating conditions, and the properties of the product being transported, however, in multi-phase infield pipelines with 3-way ball valve access, even more challenges are present, including:
- Restricted access only available in the form of a 3-way valve
- Tight bends throughout pipeline length
- No pipeline architectural information
- Flow and pressure fluctuations (well-flow characteristics)
- Multiphase medium
- Heavy debris
- High temperatures and velocities
In addition to the challenges at hand, the inspections are preferably carried out during regular operation.
When faced with these challenges, it is clear that no existing or conventional solution was applicable. ROSEN’s Solution Experts therefore began developing a completely new solution out of existing elements.
A long list of components needed to be integrated into the tool, these components consisted of: batteries, seals, magnetizer and sensors, system controller, data acquisition and storage unit, computer interface, and odometer system. Normally, this would result in an over two-meter-long unit. Instead, ROSEN experts developed an ultra-compact ILI tool equipped with proven MFL technology which only requires moderate cleanliness. The customized solution package consisted of:
- Integrated electronic and battery units inside the magnetizer body
- Strong and flexible magnetizer
- High-resolution MFL sensors
- Large polyurethane buffer for the protection of the tool and valves
- Short design for optimum flexibility and passage
- Bidirectional capability and low minimum passage requirement
- External referencing system
- Launching and receiving equipment
Pipeline modifications are not required, no liquid filling or nitrogen pumps are needed, and hydro-testing can be avoided. Furthermore,
the inspection can be completed within half a day, after preparation work is completed, limiting the interference with normal operation.
The lightweight solution also limits the need for costly onsite support equipment, pipeline modifications, and manpower.