exported
equivalent
degasser
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Degasser
Generated on 2026-04-15
Natural Language Definition
EN
A degasser is a separator that removes gases from drilling fluids by realizing a degassing function.
PT-BR
Um degaseificador é um separador que remove gases de fluidos de perfuração realizando uma função de degaseificação.
Formal Axioms
Semi-formal (Aristotelian)
Every degasser is a separator that bears a degassing function and has drilling fluid as input and degassed drilling fluid plus separated gases as outputs.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (Degasser(x) ↔ (Separator(x) ∧ ∃f (DegassingFunction(f) ∧ bearerOf(x,f))))
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: Degasser
<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_0000455 rdf:type owl:Class ; # DegassingFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000456 # DegassingProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000456 # DegassingProcess
] ;
rdfs:label "degassing function"@en ;
rdfs:label "função de degaseificação"@pt-br .
### Process type
:COPI_0000456 rdf:type owl:Class ; # DegassingProcess
rdfs:subClassOf :COPI_0000005 ; # MassTransfer
rdfs:label "degassing process"@en ;
rdfs:label "processo de degaseificação"@pt-br .
:COPI_0000005 rdf:type owl:Class . # MassTransfer
:COPI_0000456 # DegassingProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000391 # DrillingFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000391 # DrillingFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000039 # PortionOfGas
] .
### Equipment universal: Degasser
:COPI_0000241 rdf:type owl:Class ; # Degasser
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000084 # Separator
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000455 # DegassingFunction
]
)
] ;
rdfs:label "degasser"@en ;
rdfs:label "degaseificador"@pt-br ;
iof-av:naturalLanguageDefinition "A degasser is a separator that removes gases from drilling fluids by realizing a degassing function."@en ;
skos:definition "A degasser is a separator that removes gases from drilling fluids by realizing a degassing function."@en ;
iof-av:naturalLanguageDefinition "Um degaseificador é um separador que remove gases de fluidos de perfuração realizando uma função de degaseificação."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every degasser is a separator that bears a degassing function and has drilling fluid as input and degassed drilling fluid plus separated gases as outputs."@en ;
iof-av:firstOrderLogicAxiom "∀x (Degasser(x) ↔ (Separator(x) ∧ ∃f (DegassingFunction(f) ∧ bearerOf(x,f))))"@en ;
skos:definition "[ISO 15926-4] A <DEGASSER> is an <ARTEFACT> and a <FLASH SEPARATOR> that is a device used in drilling to remove gasses from drilling fluid which could otherwise form bubbles"@en ;
skos:definition "[CFIHOS] A device that removes air or gases (methane, H2S, CO2 and others) from drilling liquids."@en ;
skos:definition "[SLB Glossary] A device that removes air or gases (methane, H2S, CO2, and others) from drilling liquids."@en ;
skos:definition "[OnePetro] Any device that helps remove gas from circulated fluid."@en .
# Disjointness: Degasser and Mixer
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000241 :COPI_0000314 ) . # Degasser, Mixer
# Disjointness: Degasser and Heater
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000241 :COPI_0000124 ) . # Degasser, Heater
Axiomatization Decision Log
1
Identity-Giving Function
Function class
DegassingFunction
⊑ DesignedFunction
Realized in
DegassingProcess
⊑ MassTransfer
The identity-giving function is removing gases (air, methane, H2S, CO2) from drilling fluids. This is what makes a degasser a degasser rather than any other type of separator or processing equipment.
2
Genus Determination
Separator
ISO 15926 explicitly states that a degasser is a 'FLASH SEPARATOR', and separation equipment is already defined in our ontology. Separator is the most specific appropriate superclass, as degassing is fundamentally a gas-liquid separation process. The parent_candidates include 'FLASH SEPARATOR' which maps to our Separator class.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These parts represent the minimal physical components necessary for any degassing operation: intake of gas-laden fluid, separation chamber, and separate outlets for gas and cleaned fluid.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
DrillingFluid
— contains dissolved or entrained gases
Outputs (O)
DrillingFluid
— reduced gas content
PortionOfGas
— separated gases (methane, H2S, CO2, air)
Transformation (T)
phase separation - removal of gas phase from liquid drilling fluid
The process takes gas-laden drilling fluid and separates it into degassed liquid and removed gas streams. This is a gas-liquid separation transformation specific to drilling operations.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
Mixer
Heater
C4: Mixer, Heater. Degasser separates phases while Mixer combines them (incompatible transformations). Heater adds thermal energy while degasser performs separation (different transformation types).
Cross-Standard Observations
All sources consistently define degasser as gas removal equipment for drilling fluids. ISO 15926 provides the most structural detail by identifying it as a type of flash separator. The definitions are remarkably consistent across standards, with only minor variations in the specific gases mentioned.
