Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
bell nipple
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
Bell nipple is defined primarily by its function as a conduit and guide for drilling operations - directing drilling fluid return flow and guiding tools into the wellbore. While it has a characteristic enlarged/funnel shape, this geometry serves the functional requirements rather than being the primary identity criterion.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
Loading…
Disjoint with
▸
Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
⚠ not anchored
DrillingFluidConductionFunction → DrillingFluidConductionProcess
▼
COPI-Core operation
⚠ Process parent
PlannedProcess reaches no COPI-Core operation, and no gap (out of scope / coverage gap) is recorded.
LLM rationale:
The identity-giving function is to conduct drilling fluid in drilling operations, specifically directing return flow from the wellbore to processing equipment and providing a conduit for tool entry. This is distinct from general FluidConductionFunction as it is specialized for drilling operations context.
▸
Expert review
2
Genus Proximus
✓ done
Pipe · MaterialArtifact
▼
Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
Bell nipple is consistently described as a 'pipe' or 'section of pipe' across all sources. The parent candidates include PIPING NETWORK SEGMENT from ISO 15926, which aligns with the pipe genus. The enriched pipe class with FluidConductionFunction is the most specific appropriate superclass, as bell nipple is specialized piping for drilling operations.
▸
Expert review
3
Differentia Specifica
✓ done
∃bearerOf.DrillingFluidConductionFunction ⊓ ∃hasCharacteristicShape.EnlargedDiameter ⊓ ∃hasLocation.WellheadAssembly
▼
Conditions that distinguish
Bell Nipple
from sibling classes under genus
Pipe.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia captures the three key distinguishing aspects: the specialized drilling context function (beyond general fluid conduction), the characteristic enlarged/funnel geometry that enables tool guidance, and the specific wellhead installation location that differentiates it from other specialized pipes.
▸
Expert review
4
Necessary Parts
✓ done
SideOutlet
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
These parts are universally necessary for bell nipple function - the enlarged bore provides the funnel capability for tool guidance, while the side outlet enables drilling fluid return flow attachment.
▸
Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
⚠ 1 not in vocab
DrillingFluid + DrillingTool → DrillingFluid + DrillingTool
▼
⚠ Participant type(s) not in COPI vocabulary
DrillingTool(already published — grandfathered)
Participant types are hand-authored in
copi-vocab, not produced by the pipeline.
Replace each with an existing vocab type, redirect it to a BFO / IOF-Core class in copi-iri-map.tsv,
or add it to copi-vocab.ttl first.
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Bell nipple serves dual function: conducting drilling fluid return flow and providing guidance for drilling tools entering the wellbore. It performs spatial routing without material transformation.
▸
Expert review
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
▼
No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Bell Nipple.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
