Inspection: MFL & TFI

Inspection by Magnetic Flux Leakage (MFL) Technology

MFL technology operates on a simple principle—where there is metal loss (i.e., corrision) the magnetic field leaks from the metal. The MFL tool detects this leakage field. MFL tools have a proven track record for the detection of metal loss on the outer and inner surface of the pipewall, as well as detecting general and pitting corrosion, corrosion in or near the girthweld, and construction defects within the girthweld.

Weatherford builds on this proven technology with its MFL high-resolution tool. High- resolution translates into more reliable and accurate identification and characterization of pipeline anomalies, thus better data on the pipelines integrity status.

The software, anomaly database and analysis report (generated by the analysis center) are then compiled to form a comprehensive final report to document the integrity of the pipeline.

Inspection by Transverse Field Inspection (TFI) Technology

TFI technology incorporates a magnetic flux technique to detect and characterize narrow axially oriented anomalies by inducing a circumferential field path, rather than a longitudinal one. This method is sensitive to defects not normally detected by conventional magnetics, such as narrow axial external corrosion, cracks in long seam welds (SCC), gouges, axial notches in dents—as well as large individual cracks or large colonies of stress corrosion cracking (SSC).

Both of these tools have a proven track record, minimizing the need for expensive client-initiated verification excavations—important considerations when building a superior pipeline integrity management program. They are both well suited for use in any type of product line, whether oil, refined product, gas, water or condensate. They can be used onshore or offshore and are available in many different diameters.

The Weatherford proprietary visualization and analysis software package, providing a detailed database of anomalies, pipeline features, and geometry anomalies—allows data to be viewed in various formats.