This section describes the categories of data available from the HCR Database, statistics from which are contained in section 3.0.
Section 5.0 contains the data tables referred to in the report, all of which are listed in a separate section 5.0 index.
Section 6.0 contains the figures referred to in the report, all of which are listed in a separate section 6.0 index.
The statistics, tables, and figures show the breakdown of data using the following sort categories:
Each release has a single system type allocated to it and an individual equipment type within that system (well type and/or well operation for drilling activities). Most tables show the number of releases occurring, sorted by one or more of the above categories.
Statistics for other reported features such as ignitions, mode of detection, emergency actions taken, causation factors etc., are also given in Section 3.0.
NB: Additional data categories used in Analysis (Section 4.0) were derived from investigation reports and OTO 2001/055, and the taxonomy is included in this report.