Changes in the shape of a pipeline come in two basic forms. There are local features such as dents, ovalities and wrinkles, and there is bending. In most cases, deformation is caused by external influences: either natural phenomena, such as landslides, or accidental third-party actions, such as impact by excavation machinery. While pipelines are very tolerant of deformation damage due to the inherent ductility and toughness of steel, the high stresses and strains caused by these features can compromise integrity and result in failures, particularly when they are combined with other anomalies like gouges, corrosion or weld flaws. Severe deformation can also result in flow restrictions or prevent the passage of cleaning and inspection tools. Therefore, reliable means for identifying, locating, quantifying and assessing these changes in shape are critical for all pipeline operators.

In our networked and GPS-enabled world, we all take location information for granted. For many pipelines built before the days of satellites, construction survey records have been lost, and so the position is not known accurately. Rapid response to critical defects requires accurate information on the position to make sure that the right location is excavated. Cost-effective planned maintenance requires detailed data on the anomaly location. Understanding and managing geo-hazards requires a clear understanding of the transitions between stable and moving ground. Consequently, reliable information on the position of features in a pipeline, the position of the pipeline and changes in position is of great importance to all pipeline operators.

The ROSEN Group operates the largest fleet of geometry and mapping tools in the industry, paired with a variety of integrity assessments the following technologies individually or in combination assist in managing the risk presented by this threat:
 

RoGeo MD Service

Robust MD Technology mechanical dippers with high-resolution electronic angle sensors represent a cost-effective way to detect internal-diameter (ID) anomalies in any medium. The extremely lightweight tool causes only very low friction and provides reliable data even with low operating pressure.

Our advanced geometry service is the perfect solution for many geometry inspection purposes. The robust RoGeo MD Service can be used to inspect the as-built quality of a pipeline, identify third-party damage, or confirm passage for subsequent cleaning or in-line inspection tools.

RoGeo XT Service

The unique XT Technology combination of mechanical caliper measurements with eddy current proximity sensors provides unrivalled industry-renowned data sets of the highest quality for both liquid and gas pipelines. Detailed and accurate 3D representations of any geometric anomaly can be generated for visualization and modelling. Additional information includes the identification and characterization of bends and small changes in internal diameter, plus scale, debris and wax deposits profiling.

Our premium RoGeo XT service is a high-definition inspection service suitable for integrity management programs addressing dents, buckles, ovalities, stress-induced geometric features and pipeline bending.

RoGeo XYZ Service

Optimized XYZ Technology using integrated Fiber Optic Gyroscope (iFOG) and micro-electronic mechanical systems (MEMS) gives precise location and curvature data that can be used in geographic information systems, stress modelling and movement analyses.

The RoGeo XYZ service is a cost-effective way of producing pipeline drawings when original construction drawings may not be available. The tool can run through remote and inaccessible areas where conventional above-ground mapping surveys are impractical. In addition to providing information on the pipeline’s position, RoGeo XYZ data serves as the basis for performing bending strain and pipeline movement assessments.

From Detection to Management

We know that inspection and engineering assessment must go hand in hand. Therefore, our high-end inspection technologies are complemented by a broad range of assessment services. Combining inspection and assessment reduces uncertainty, thereby increasing safety and minimizing cost. These Services include:

  • Strain and stress assessments
  • Bending strain and pipeline movement
  • Depth-of-cover mapping
  • Geo-hazard mapping
  • Fatigue assessment
  • Finite element analysis
  • Soil loading models