Types of reports

The final stage of in-line inspection is a report preparation. A report is made according to analysis of signals, picked up by the inspection tools. To decode a set of signals, various methods, algorithms and proprietary software are applied.

Report can be submitted in several forms:

Preliminary report

Preliminary report is issued within the minimum period of time, indicating significant defects that are subject to immediate field inspection or anomalies selected for calibration the evaluation methods of its parameters.

Partial report

Partial report is a result of full data analysis for part of inspected section located between certain blocking valves and is issued upon agreement with a customer in case of conducting urgent repair operations.

Conclusive or final report

Final report on the results of in-line inspection contains fullest information about operating of ILI tools, all detected construction features, characteristics, anomalies (defects) and its measured parameters. The results of severity assessments and information on priorities of field inspection of detected anomalies can be submitted for reference purposes.

Report on revisions

Report on revisions includes anomalies with changed parameters and estimation of remaining strength of any defects. This type of report is generally issued after submission of final report in case any additional information on inspected section arises afterwards.

Other types of reports

Additional reports for a certain inspection tool, e.g. geometry pig. Such reports are issued subject to agreement with a customer.

A report of LLC «NPC «VTD» upon the results of in-line inspection is provided to a customer in hard copy and in the form of electronic data along with the software, designed for visual representation and analysis.

LLC «NPC «VTD» takes three approaches for submitting processed data of in-line inspection, that can be conditionally identified as follows:

"Printed" report

"Electronic" report

Analysis data in geographic information system (GIS) exchange format.

"Printed" report

"Printed" report is a file with hyperlinks in Adobe pdf format, which is transferred to a customer in hard and soft copy version.

This report is a self-contained document, where processed data on in-line inspection, methods of evaluation of the anomaly severity, reference material on applied terms and definitions and bibliographical resources are represented.

The structure and composition of "printed" report are in accordance with the following regulations:

STO Gazprom 2-2.3-1050-2016 Vnutritrubnoe tehnicheskoe diagnostirovanie. Trebovanija k provedeniju, priemke i ispol'zovaniju rezul'tatov diagnostirovanija / M.: Gazprom, 2016 (In-line inspection of pipelines. Requirements for organization, acceptance of work and usage of inspection data);

VTD.STP 8.03.2016S Obrabotka rezul'tatov vnutritrubnoj diagnostiki. Soderzhanie (pechatnogo) otchjota po rezul'tatam VTD, Ekaterinburg: OOO "NPC "VTD", 2016 (In-line inspection data treatment. Contents of the (printed) report);

Specifications and requirements for intelligent pig inspection of pipelines. Pipeline Operator Forum, 2009.

"Electronic" report

"Electronic" report is intended for visual representation and analysis of in-line inspection. It makes it possible to work with the data of in-line inspection on one section of the pipeline.

Key benefits of the "Electronic" report:

• Results are provided in the form of adjustable tables and diagrams;

• Table data filtering and reordering is possible, incl. reordering with respect to different severity criteria;

• Re-assessment of the whole section anomaly severity is available;

• Severity calculator for individual anomalies (safe working pressure, failure pressure, Estimted Repair Factor, mitigation time) with the application of various standards is provided;

• Visual analysis of plots and histograms depicting distribution of anomalies with respect to various parameters;

• Fully assessed feature sheets (with raw data) can be generated for any damaged pipe;

• Table data can be exported to tab-delimited or MS Excel files;

• Map view. Possibility to add raster background (geotiff, jpeg).

Analysis data in GIS

LLC «NPC «VTD» has a technical capability for submitting the data of in-line inspection to a customer, that is suitable for application in any geographic information systems. Such an approach expands opportunities of a customer for visual representation and analysis.

Main features of this approach:

• Data are submitted in a form of industry-standard ESRI shapefiles. Several third party software tools are available for their analysis;

• Flexible data representation;

• Inspection data can be viewed, filtered, explored and combined with other types of information with geospatial binding such as maps, aerial views, etc.

• Contents of report can be exported to various databases, maps and navigation devices (depending on possibilities of applyed GIS).