exported
equivalent
drill bit
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Drillbit
Generated on 2026-08-08
Natural Language Definition
EN
A material artifact that bears a rock cutting function, used to crush or cut formation rock in order to create a borehole.
PT-BR
Um artefato material que possui uma função de corte de rocha, usado para triturar ou cortar rocha da formação a fim de criar um poço.
Formal Axioms
First-Order Logic Theory
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OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix : <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> .
@prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix apv: <http://inf.ufrgs.br/ontologies/apv#> .
### COPI — Core Ontology for Petroleum Installations
### Class module: DrillBit
<https://www.inf.ufrgs.br/ontologies/copi>
rdf:type owl:Ontology ;
dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ;
dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ;
dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ;
skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ;
skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ;
skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ;
skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ;
owl:versionInfo "1.1.0" ;
owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ;
owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
dcterms:creator "Nicolau Oyhenard dos Santos"@en ;
dcterms:contributor "Cauã Antunes" ;
dcterms:contributor "Haroldo Rojas" ;
dcterms:contributor "Rafael Petry" ;
dcterms:contributor "Régis Romeu" ;
dcterms:contributor "Mara Abel" ;
dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ;
dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ;
dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
dcterms:created "2026-04-08"^^xsd:date ;
dcterms:modified "2026-10-08"^^xsd:date ;
apv:GlobalMinLanguageCoverage "en pt-br" ;
apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ;
apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" .
iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ;
apv:MinAnnotationLength 20 .
### Identity-giving function
:COPI_0000716 rdf:type owl:Class ; # RockCuttingFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000717 # RockCuttingProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000717 # RockCuttingProcess
] ;
rdfs:label "rock cutting function"@en ;
rdfs:label "função de corte de rocha"@pt-br ;
iof-av:naturalLanguageDefinition "A designed function borne by petroleum production equipment whose realization constitutes the mechanical disintegration of subsurface rock through cutting, crushing, or shearing action to advance a wellbore."@en ;
skos:definition "A designed function borne by petroleum production equipment whose realization constitutes the mechanical disintegration of subsurface rock through cutting, crushing, or shearing action to advance a wellbore."@en ;
iof-av:naturalLanguageDefinition "Uma função projetada portada por equipamento de produção de petróleo cuja realização consiste na desagregação mecânica da rocha de subsuperfície por corte, esmagamento ou cisalhamento, para avançar um poço."@pt-br .
### Process type
:COPI_0000717 rdf:type owl:Class ; # RockCuttingProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "rock cutting process"@en ;
rdfs:label "processo de corte de rocha"@pt-br ;
iof-av:naturalLanguageDefinition "A planned process in which subsurface rock is mechanically disintegrated through cutting, crushing, or shearing action by a drill bit to advance a wellbore."@en ;
skos:definition "A planned process in which subsurface rock is mechanically disintegrated through cutting, crushing, or shearing action by a drill bit to advance a wellbore."@en ;
iof-av:naturalLanguageDefinition "Um processo planejado em que a rocha de subsuperfície é desagregada mecanicamente por corte, esmagamento ou cisalhamento de uma broca, para avançar um poço."@pt-br .
:COPI_0000717 # RockCuttingProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000040 # PortionOfSolid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000399 # RockCuttings
] .
### Equipment universal: DrillBit
:COPI_0000723 rdf:type owl:Class ; # DrillBit
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
iof-core:MaterialArtifact
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000716 # RockCuttingFunction
]
)
] ;
rdfs:label "drill bit"@en ;
rdfs:label "broca"@pt-br ;
iof-av:naturalLanguageDefinition "A material artifact that bears a rock cutting function, used to crush or cut formation rock in order to create a borehole."@en ;
skos:definition "A material artifact that bears a rock cutting function, used to crush or cut formation rock in order to create a borehole."@en ;
iof-av:naturalLanguageDefinition "Um artefato material que possui uma função de corte de rocha, usado para triturar ou cortar rocha da formação a fim de criar um poço."@pt-br ;
dcterms:source <https://standards.iso.org/iso/15926/-4/reference-data-item/DRILL_BIT> ;
dcterms:source <https://glossary.slb.com/en/terms/d/drill_bit> ;
dcterms:source <https://onepetro.org/search-results?page=1&q=drill-bit> .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
RockCuttingFunction
⊑ DesignedFunction
Realized in
RockCuttingProcess
⊑ PlannedProcess
All three sources define the drill bit purely by what it does to rock — 'used to create cylindrical holes', 'rock cutting device', 'tool used to crush or cut rock'. None constrains its construction, so the function is identity-giving and sufficient.
2
Genus Determination
MaterialArtifact
bfo:Object (BFO_0000030)
Monolithic causally unified material artefact.
MaterialArtifact ≡ Object ⊓ ∃bearerOf.DesignedFunction.
ISO 15926 types it as a CUTTING TOOL, which COPI does not declare; MaterialArtifact is the nearest available superclass.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
No sub-component is named in any source definition for this term. validate_necessary_parts_quotes() requires a verbatim source_quote for every part, and there is nothing to quote — so no parts are asserted (ODR-022 §10.2).
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfSolid
— in-situ formation rock at the bottom of the borehole
Outputs (O)
RockCuttings
— comminuted rock fragments released into the drilling fluid
Transformation (T)
mechanical comminution of formation rock to advance a borehole
Input is intact formation rock, output is cuttings; the transformation is the defining act of the bit.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Reviewer Notes
ODR-022 §O6: standard-term component of 'bottom hole assembly'. Admitted to the pipeline because it is a term in a source standard AND that standard states it is a component of that equipment (verbatim source_quote in the owning entry). Awaiting expert review.
