2-7/8" EU 8RD X 3" LP X 12IN J55 L80 SWAGE PXP
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.
- Brand: Henan Sunjoy
- SKU: 480EA
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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) 
