2-7/8" EU 8RD X 3" LP X 12IN J55 L80 SWAGE PXP
Les connecteurs/subs de tubage (souvent confondus avec les « joints de tube court » mais techniquement distincts) sont des composants essentiels des colonnes de tubage des puits de pétrole et de gaz. Ils assurent des connexions sûres et étanches entre les segments de tubage ou les outils de fond, garantissant ainsi l'intégrité structurelle dans les environnements à haute pression et température.
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Introduction to Tubing Connectors/Subs
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Tubing connectors/subs (often conflated with "pup joints" but technically distinct) are critical components in oil/gas well tubing strings. They provide secure, pressure-tight connections between tubing segments or downhole tools, ensuring structural integrity in high-pressure/temperature environments.
Key Features & Functions
1. Primary Roles
2. Types & Applications
3. Technical Specifications
- Standards: API 5B (threading), API 5CT (material)
- Pressure Rating: Up to 15,000 psi (V0-rated premium connectors)
- Materials: L80, P110, or corrosion-resistant alloys (CRA) like 13Cr/Inconel for sour wells
- Thread Types:
- EUE (External Upset End): Enhanced tensile strength
- Premium Threads: Metal-sealed (e.g., Hydril Wedge, VAM) for HP/HT wells
Tubing Pup Joint vs. Connector/Sub
While both are tubular components:
- Pup Joint: Short pipe (2-20 ft) for depth adjustment.
- Connector/Sub: Fitting for joining components (not length-dependent).
Industry Applications
- Well Construction: Assembling tubing strings with gas-tight seals.
- Artificial Lift: Connecting pump seats/valves in ESP or rod lift systems.
- Smart Wells: Integrating sensors/control lines via ported subs.
- Sour Service: CRAs prevent H₂S-induced cracking.
Critical Design Note: Connectors must match tubing grade/tensile loads. Mismatched threads cause 23% of tubing failures (OTC 2021 data).
Visual Reference
[Illustration: Tubing string assembly showing pup joints (length adjusters) and connectors/subs (joining points)]
For clarity:
- "油管短节" = Tubing pup joint (length-focused)
- "油管接头" = Tubing connector/sub (connection-focused)
(No relation to YouTube, despite "油管" colloquialism) 
