7.2.1 Data Model

Figure 7.2.1.1-1 shows a UML diagram of the main tubular data object. Remember, all Energistics data object schemas (XSD files) are produced from the UML model; so the UML model reflects the schema organization. The basic organization of this set of objects is:

• Tubular: an ordered list of components that comprise a string and particular attributes (size, weight, order, etc.) and properties of those components.

• Tubular component (optional) (Figure 7.2.1.2-1): Specify additional details about each of the components in the string

  • Tubular tool (optional) (Figure 7.2.1.3-1): In the tubular component object, if you specify a component as a tool, use this object to provide additional details about that tool. For example, details can be provided for sensors, MWD, or rotary steerable tools.
  • Tubular bit record (optional) (Figure 7.2.1.4-1): In the tubular component object, if you specify a component as a bit record, use this object to provide additional details about that bit record. For example, statistical data about the bit can be used in bit performance evaluation workflows.

The tubulars object must reference a “parent” wellbore.

The duration that a tubular was used in a string can be specified in a referenced BHA run object.