exported
equivalent
down hole safety valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Downholesafetyvalve
Generated on 2026-04-16
Natural Language Definition
EN
A down hole safety valve is a safety valve that bears a subsurface safety function for pressure relief and flow control operations in wellbore or other subsurface environments.
PT-BR
Uma válvula de segurança de fundo de poço é uma válvula de segurança que possui uma função de segurança subsuperficial para operações de alívio de pressão e controle de fluxo em poços ou outros ambientes subsuperficiais.
Formal Axioms
Semi-formal (Aristotelian)
Every down hole safety valve is a safety valve that bears a SubsurfaceSafetyFunction and participates in SubsurfaceOperationProcess
First-Order Logic Theory
Loading…
▸ Stored override
∀x(DownHoleSafetyValve(x) ↔ SafetyValve(x) ∧ ∃f(SubsurfaceSafetyFunction(f) ∧ bearerOf(x,f)) ∧ ∃p(SubsurfaceOperationProcess(p) ∧ participatesIn(x,p)))
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: DownHoleSafetyValve
<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_0000170 rdf:type owl:Class ; # SubsurfaceSafetyFunction
rdfs:subClassOf :COPI_0000032 ; # SafetyReliefFunction
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000657 # SubsurfaceSafetyProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000657 # SubsurfaceSafetyProcess
] ;
rdfs:label "subsurface safety function"@en ;
rdfs:label "função de segurança subsuperficial"@pt-br .
:COPI_0000032 rdf:type owl:Class . # SafetyReliefFunction
### Process type
:COPI_0000657 rdf:type owl:Class ; # SubsurfaceSafetyProcess
rdfs:subClassOf :COPI_0000034 ; # SafetyReliefProcess
rdfs:label "subsurface safety process"@en ;
rdfs:label "processo de segurança subsuperficial"@pt-br .
:COPI_0000034 rdf:type owl:Class . # SafetyReliefProcess
:COPI_0000657 # SubsurfaceSafetyProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: DownHoleSafetyValve
:COPI_0000112 rdf:type owl:Class ; # DownHoleSafetyValve
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000148 # SafetyValve
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000170 # SubsurfaceSafetyFunction
]
)
] ;
rdfs:label "down hole safety valve"@en ;
rdfs:label "válvula de segurança de fundo de poço"@pt-br ;
iof-av:naturalLanguageDefinition "A down hole safety valve is a safety valve that bears a subsurface safety function for pressure relief and flow control operations in wellbore or other subsurface environments."@en ;
skos:definition "A down hole safety valve is a safety valve that bears a subsurface safety function for pressure relief and flow control operations in wellbore or other subsurface environments."@en ;
iof-av:naturalLanguageDefinition "Uma válvula de segurança de fundo de poço é uma válvula de segurança que possui uma função de segurança subsuperficial para operações de alívio de pressão e controle de fluxo em poços ou outros ambientes subsuperficiais."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every down hole safety valve is a safety valve that bears a SubsurfaceSafetyFunction and participates in SubsurfaceOperationProcess"@en ;
iof-av:firstOrderLogicAxiom "∀x(DownHoleSafetyValve(x) ↔ SafetyValve(x) ∧ ∃f(SubsurfaceSafetyFunction(f) ∧ bearerOf(x,f)) ∧ ∃p(SubsurfaceOperationProcess(p) ∧ participatesIn(x,p)))"@en ;
skos:definition "[ISO 15926-4] A <DOWN HOLE SAFETY VALVE> is a <SAFETY VALVE> that is intended for subsurface control/check operation"@en ;
skos:definition "[CFIHOS] A valve that is intended for subsurface control/check operation."@en .
# Disjointness: DownHoleSafetyValve and ManualValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000112 :COPI_0000133 ) . # DownHoleSafetyValve, ManualValve
Axiomatization Decision Log
1
Identity-Giving Function
Function class
SubsurfaceSafetyFunction
⊑ SafetyReliefFunction
Realized in
SubsurfaceSafetyProcess
⊑ SafetyReliefProcess
The identity-giving function is the safety relief function specialized for subsurface deployment. This combines the core safety valve function (pressure relief/protection) with the specific operational context (downhole/subsurface conditions). The existing SafetyReliefFunction from the enriched safety valve class serves as the parent.
✓
Expert review — Accepted
2
Genus Determination
SafetyValve
ISO 15926 explicitly states this is a subtype of SAFETY VALVE, which is already enriched in our ontology. The genus 'safety valve' is the most specific appropriate superclass, inheriting the SafetyReliefFunction and basic valve structure. This follows the Aristotelian principle of choosing the most specific existing superclass rather than collapsing to a broader category like Valve or Assembly.
✓
Expert review — Accepted
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
The necessary parts are specializations of standard safety valve components adapted for subsurface deployment. The valve body must handle downhole conditions, and the actuation mechanism must function in the subsurface environment where traditional surface-based control may not be available.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— under pressure in wellbore environment
Outputs (O)
PortionOfFluid
— pressure relieved when safety conditions are met
Transformation (T)
pressure relief and flow control in subsurface conditions
Same basic signature as surface safety valves but operating in the specialized environment of a wellbore or subsurface installation with different pressure, temperature, and accessibility constraints.
✓
Expert review — Accepted
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
✓
Expert review — Accepted
Disjointness Axioms
ManualValve
C4: manual valve. C?: surface safety valve [unverifiable_class_not_in_db]. Disjoint with surface safety valves due to incompatible deployment contexts (subsurface vs surface). Disjoint with manual valves due to incompatible control signatures (automatic safety response vs manual operation).
Cross-Standard Observations
Both ISO 15926 and CFIHOS agree on the subsurface deployment aspect. CFIHOS mentions 'control/check operation' which suggests dual functionality, while ISO 15926 emphasizes it as a specialized safety valve. The concept integrates both safety and operational control functions in subsurface environments.
Source Definitions
2 sources
ISO 15926-4
DOWN HOLE SAFETY VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
down hole safety valve
Definition text withheld (copyrighted standard) — follow the source link above.
Metadata
| Ontology | COPI |
| Research group | INF-UFRGS-Ontologies |
| Funding | CNPq INF-UFRGS-ENERGIA |
| Project | OntoKG / Petrobras |
| ID | #162 |
| Cluster | down hole safety valve |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-16 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
wikimedia/valve.svg
