An assembly composed of the bit, stabilizers, reamers, drill collars, subs, etc., used at the bottom of the drillstring. Commonly abbreviated BHA.

ref_existence_kind (M, K, I: ref_existence_kind)

The existence kind for the facility e.g. actual, planned, required or predicted. Inherited from facility.


identifier (O, K, I: ndt_name)

The label used to identify a facility. Inherited from wellbore_component_facility.


wellbore (M, K, I: wellbore(wellbore_component_facility))

Specifies the wellbore in which this facility is installed. Each bottomhole_assembly must be a part of one wellbore. Inherited from wellbore_component_facility.


belongs_to_assembly (K, I, V: BAG[0:1] wellbore_component_facility(component_parts)) (1124)

This points to the wellbore_component_facility assembly tha tthis is a part of. Each bottomhole_assembly may be a part of one wellbore_component_facility. Inherited from wellbore_component_facility.


description (O, I: ndt_comment)

A description of the facility. Inherited from facility.


device_length (O, I: ndt_length)

The length of the wellbore device. Inherited from wellbore_device.


end_date (O, I: ndt_date_tod) (0840)

This is the date and time of day when this wellbore component facility was permanently removed from service. Inherited from wellbore_component_facility.


inner_diameter (O: ndt_length_diameter)

The inner diameter of the bottomhole assembly


outer_diameter (O, I: ndt_length_diameter)

The outer diameter of the wellbore device Inherited from wellbore_device.


start_date (O, I: ndt_date_tod) (0840)

This is the date and time when this wellbore component facility was placed in service within the wellbore. Inherited from wellbore_component_facility.


activity (I, V: SET[0:?] activity(facility))

Defines the activities which have made use of or plan to use this facility. Each bottomhole_assembly may utilized by one or more activity. Inherited from facility.


address (I, V: SET[0:?] address(facility)) (1159)

The set of addresses which have been defined for this facility. Each bottomhole_assembly may have one or more address. Inherited from facility.


application_for_permit (I, V: SET[0:?] application_for_permit(facility))

These are the applications for permit which have been submitted for this facility. Each bottomhole_assembly may be the subject of one or more application_for_permit. Inherited from facility.


business_associate_facility_association (I, V: SET[0:?] business_associate_facility_association(facility))

Indicates various involvements with business associates. Each bottomhole_assembly may have one or more business_associate_facility_association. Inherited from facility.


component_parts (O, I: LIST OF UNIQUE[0:?] wellbore_component_facility(belongs_to_assembly)) (1124)

This points to the wellbore_component_facilities that this assembly is made up from. This relationship is a unique list, which represents the order in which the wellbore_component_facilities were assembled. This means that facilities next to each other in the list can be interpreted as connected to each other. The order is; the first in the list was first in the hole, i.e. is nearest the bottom of the well. Each bottomhole_assembly may have as parts one or more wellbore_component_facility. Inherited from wellbore_component_facility.


connected_to (I, V: SET[0:?] wellbore_component_facility_connection(wellbore_component_facility)) (1124)

This gives the connections from this wellbore_compoenent_facility to other instances of wellbore_component_facility. Do not use this to connect wellbore_component_facility to other wellbore_component_facilities that are part of the same wellbore_compoenent_facility assembly, but rather use it to connect two different assemblies. Each bottomhole_assembly may connected to one or more wellbore_component_facility_connection. Inherited from wellbore_component_facility.


data_collection (I, V: SET[0:?] data_collection(collection_content))

Indicates the data collections that include this instance of E and P data. Each bottomhole_assembly may be a member of one or more data_collection. Inherited from e_and_p_data.


datum_for_ranking (I, V: SET[0:?] object_ranking(base_object))

Indicates that an object is being used as a basis for comparison with another object. Each bottomhole_assembly may datum for ranking one or more object_ranking. Inherited from object_of_interest.


derived_interest (I, V: SET[0:?] derived_interest_makeup(interest_for))

These are the ownership fractions for business associates of this business object. Each bottomhole_assembly may be owned according to one or more derived_interest_makeup. Inherited from business_object.


equipment_installation (I, V: SET[0:?] equipment_installation(facility))

Gives the equipment utilizations that contribute to the service or business function of the facility, otherwise described as installation. Each bottomhole_assembly may define the service resulting from one or more equipment_installation. Inherited from facility.


facility_classification (I, V: SET[0:?] facility_classification(facility))

Gives the classifications that have been made of the facility. Each bottomhole_assembly may be classified by one or more facility_classification. Inherited from facility.


fulfill (I, V: SET[0:?] facility_fulfillment(fulfillment))

Shows the fulfillment of this facility (planned, required, or) expected) by another facility via the fulfillment association. Each bottomhole_assembly may be fulfilled by one or more facility_fulfillment. Inherited from facility.


fulfillment (I, V: SET[0:?] facility_fulfillment(fulfill))

Indicates the various planned facilities from which this facility is derived. Each bottomhole_assembly may be fulfillment of one or more facility_fulfillment. Inherited from facility.


graphical_element (I, V: SET[0:?] graphical_element(depicted_object))

Specifies one or more graphical elements which are depicting this data item. Each bottomhole_assembly may be depicted by one or more graphical_element. Inherited from e_and_p_data.


guideline_or_privilege (I, V: SET[0:?] guideline_or_privilege(business_object))

These are the guidelines, limitations, regulations or privileges that are specifically defined for this business object. Other general guidelines, etc., that apply to this business object are defined via the typical and class relationships (if any) defined for this business object. Each bottomhole_assembly may be the subject of one or more guideline_or_privilege. Inherited from business_object.


guideline_or_privilege_compliance (I, V: SET[0:?] guideline_or_privilege_compliance(business_object))

These are the designations of compliance with guidelines, limitations, regulations and privileges that are made for this business object. Each compliance statement describes the state of compliance for a specified guideline, limitation, regulation or privilege for a period of time. Each bottomhole_assembly may be the subject of one or more guideline_or_privilege_compliance. Inherited from business_object.


materials_characterization (I, V: SET[0:?] materials_characterization(site))

Indicates various materials analysis activities which take place at this site. Each bottomhole_assembly may be the site of one or more materials_characterization. Inherited from facility.


material_installation (I, V: SET[0:?] material_installation(facility))

Gives all the material utilizations that contribute to the service or business purpose of the facility. Each bottomhole_assembly may defines the service resulting from one or more material_installation. Inherited from facility.


object_of_ranking (I, V: SET[0:?] object_ranking(ranked_object))

Indicates that an object is being classified in a rank order based on its characteristics. Each bottomhole_assembly may object of ranking one or more object_ranking. Inherited from object_of_interest.


part_of_facility (I, V: SET[0:?] facility_composition(part))

Gives the facilities for which this facility is a component part. For example: CDU1 is part of Refinery A. Each bottomhole_assembly may be the part for one or more facility_composition. Inherited from facility.


position_in_wellbore (I, V: SET[0:?] position_in_wellbore(wellbore_component_facility))

Specifies the placement of a facility within a wellbore. Each bottomhole_assembly may be located by one or more position_in_wellbore. Inherited from wellbore_component_facility.


property_damage (I, V: SET[0:?] property_damage(facility))

Indicates various records of property damage associated with this facility. Each bottomhole_assembly may be afflicted with one or more property_damage. Inherited from facility.


sample_acquisition (I, V: SET[0:?] sample_acquisition(site))

Indicates various material acquisition activities which take place at this facility. Each bottomhole_assembly may be the site of one or more sample_acquisition. Inherited from facility.


satisfy_obligation (I, V: SET[0:?] contractual_obligation(contractual_obligation_object))

These are the contractual obligations that this business object is designated as fulfilling, either completely or partially. Each bottomhole_assembly may satisfy one or more contractual_obligation. Inherited from business_object.


site_of_activity (I, V: SET[0:?] materials_processing(located_by_facility))

Indicates various materials processing activities which take place at this site. Each bottomhole_assembly may be the site of one or more materials_processing. Inherited from facility.


subject_of_contract (O, I: SET[0:?] contract(contract_business_object))

These are the contracts that specify information about the business object, and the business object is subject to the terms of these contracts. Each bottomhole_assembly may be a subject of one or more contract. Inherited from business_object.


subject_of_contract_designation (I, V: SET[0:?] contract_designation(contract_designation_object))

This defines the contract designations that are made for this business object. For example, this may be the contract designations that define the specific interest ownership fractions of the business object as it is bought and sold. Each bottomhole_assembly may be subject to one or more contract_designation. Inherited from business_object.


typical_facility (O, I: typical_facility(facility))

Gives the typical facility whose specification was used as the generic basis for this facility. Each bottomhole_assembly may be specified by one typical_facility. Inherited from facility.

Local rules:

Uniqueness Constraint
ref_existence_kind, identifier, wellbore, belongs_to_assembly
Supertype path(s):
e_and_p_data > object_of_interest > business_object > facility > wellbore_component_facility > wellbore_device > bottomhole_assembly.

Entity consolidated into table WELLBORE_DEVICE.

Referenced in Diagrams:

• WB3: Wellbore Devices