exported
equivalent
shear ram
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Shearram
Generated on 2026-04-15
Natural Language Definition
EN
A shear ram is a ram that bears a pipe shearing function and has hardened cutting blades designed to cut drillpipe or tubing during blowout prevention operations.
PT-BR
Um aríete de corte é um aríete que possui função de corte de tubulação e tem lâminas de corte endurecidas projetadas para cortar a coluna de perfuração ou tubulação durante operações de prevenção de blowout.
Formal Axioms
Semi-formal (Aristotelian)
Every shear ram is a ram that has the function to shear pipe and has shearing blades as component parts at all times.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(ShearRam(x) ↔ Ram(x) ∧ ∃f(PipeShearingFunction(f) ∧ bearerOf(x,f)) ∧ ∃b(ShearingBlade(b) ∧ hasComponentPartAtAllTimes(x,b)))
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: ShearRam
<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_0000596 rdf:type owl:Class ; # PipeShearingFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000597 # PipeShearingProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000597 # PipeShearingProcess
] ;
rdfs:label "pipe shearing function"@en ;
rdfs:label "função de corte de tubulação"@pt-br .
### Process type
:COPI_0000597 rdf:type owl:Class ; # PipeShearingProcess
rdfs:subClassOf :COPI_0000010 ; # FlowControl
rdfs:label "pipe shearing process"@en ;
rdfs:label "processo de corte de tubulação"@pt-br .
:COPI_0000010 rdf:type owl:Class . # FlowControl
:COPI_0000597 # PipeShearingProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000321 # SteelPipe
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000321 # SteelPipe
] .
### Equipment universal: ShearRam
:COPI_0000348 rdf:type owl:Class ; # ShearRam
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
iof-core:Assembly
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000596 # PipeShearingFunction
]
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000638 # ShearingBlade
]
)
] ;
rdfs:label "shear ram"@en ;
rdfs:label "aríete de corte"@pt-br ;
iof-av:naturalLanguageDefinition "A shear ram is a ram that bears a pipe shearing function and has hardened cutting blades designed to cut drillpipe or tubing during blowout prevention operations."@en ;
skos:definition "A shear ram is a ram that bears a pipe shearing function and has hardened cutting blades designed to cut drillpipe or tubing during blowout prevention operations."@en ;
iof-av:naturalLanguageDefinition "Um aríete de corte é um aríete que possui função de corte de tubulação e tem lâminas de corte endurecidas projetadas para cortar a coluna de perfuração ou tubulação durante operações de prevenção de blowout."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every shear ram is a ram that has the function to shear pipe and has shearing blades as component parts at all times."@en ;
iof-av:firstOrderLogicAxiom "∀x(ShearRam(x) ↔ Ram(x) ∧ ∃f(PipeShearingFunction(f) ∧ bearerOf(x,f)) ∧ ∃b(ShearingBlade(b) ∧ hasComponentPartAtAllTimes(x,b)))"@en ;
skos:definition "[ISO 15926-4] A <SHEAR RAM> is an <ARTEFACT> and a <RAM> that is a closure mechanism on a wells blowout-preventer stack fitted with chisel-like jaws that are hydraulically operated. When the ram is closed on the pipe, the jaws or blades cut the pipe, permitting the upper section to be removed from the BOP stack"@en ;
skos:definition "[CFIHOS] A shear valve is a ram-type BOP, similar in operation to a gate valve, but uses a pair of opposing steel plungers, rams. The rams extend toward the centre of the wellbore to restrict flow or retract open in order to permit flow."@en ;
skos:definition "[SLB Glossary] A blowout preventer (BOP) closing element fitted with hardened tool steel blades designed to cut the drillpipe or tubing when the BOP is closed, and then fully close to provide isolation or sealing of the wellbore."@en ;
skos:definition "[OnePetro] A ram in the BOP that shears off the pipe."@en .
:COPI_0000638 rdf:type owl:Class ; # ShearingBlade
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "lâmina de cisalhamento"@pt-br ;
rdfs:label "shearing blade"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
PipeShearingFunction
⊑ DesignedFunction
Realized in
PipeShearingProcess
⊑ FlowControl
The identity-giving function is the designed capability to cut/shear pipe during blowout prevention. This distinguishes it from other BOP ram types like pipe rams or blind rams that have different functions.
2
Genus Determination
Assembly
bfo:Object (BFO_0000030)
Causally unified material artefact composed of physically connected,
separable MaterialComponent parts. Satisfies
Assembly ⊑ MaterialArtifact ⊑ bfo:Object.
All sources consistently identify this as a specific type of ram. Ram is the most specific appropriate superclass - it represents the closure mechanism category in BOP systems. While not yet enriched in our ontology, it is the obvious domain superclass that would have its own designed function and structural characteristics.
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| ShearingBlade | MaterialArtifact | hasComponentPartAtAllTimes |
Shearing blades are the distinguishing parts specific to shear rams, while the ram body provides the structural foundation common to all rams but necessary for this specific implementation.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
SteelPipe
— drillpipe or tubing within wellbore
Outputs (O)
SteelPipe
— severed upper and lower pipe sections
Transformation (T)
mechanical cutting/shearing action separates continuous pipe into discrete sections
The signature involves taking a continuous pipe and mechanically severing it into separate sections, enabling removal of the upper section while sealing the wellbore.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Cross-Standard Observations
All sources consistently identify the pipe cutting/shearing function and hardened blade mechanism. CFIHOS provides less detail on the cutting aspect but confirms the ram-type BOP classification. The definitions are well-aligned across sources.
