Page 122 - Pipeline Pigging Technology

A computerized inspection system

information already held to ensure it is consistent. Users are also able to delete
a particular occurrence of a record type but the option to delete a complete
hierarchy of records (e.g. in inspection) is limited to the database mainte-
nance category.

Bulk loading

Functions are available to bulk load nearly all of the inspection results
automatically, from magnetic tape, thus reducing manual input to a minimum.
The tapes are completed offshore during the surveys, or shortly after, by the
inspection contractors. The format of the tapes has been designed to accom-
modate the requirements of this system and the standard working procedures
of contractors.
The following data can be "bulk" loaded: acoustic inspection, incorporat-
ing pipe burial condition, trench condition and observations; ROV inspec-
tion, incorporating observations, longitudinal profile, transverse profiles, and
CP potential.

Reporting

A number of reports are available either for display at the terminal or
output to the printer. On choosing the report required, the user is prompted
to enter the selection criteria and the output device. Selection criteria can be
such as: a range of PKs, particular type of observation, dates, etc.
There are printed reports available for any data held on the database, such
as list of inspections, list of observations (Fig.2).
In addition, some graphical reports are available which correspond to the
visual charts used in pipeline inspection such as: ROV alignment sheet (Fig. 3),
acoustic summary sheet, free span drawing.

Analysis

A number of analyses can be requested which allow the results of several
inspections to be processed.
The results from all inspections performed to date can be merged in
summary charts providing the latest information available at any point of the
pipeline. Summary charts available include:

pipe burial condition (Fig.4);
summary of observations (Fig.5);

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