Large OD Pipes for Geothermal
In geothermal wells, LOD (Large Outer Diameter) pipes used in the upper part of the well have unique requirements. Vallourec provides a wide range of LOD tubes and connections adapted to every type of geothermal project.
In geothermal wells, LOD (Large Outer Diameter) pipes used in the upper part of the well have unique requirements.
Tubes
For casings of 16” to 18 5/8”, Vallourec manufactures its own high-quality seamless API grades (all 5CT steels from K55 to Q125).
To cover every LOD need, we work with longstanding and qualified partners for larger diameters. Our offer for 20” casing covers both LOD ERW* and seamless pipes fitted with Vallourec premium or semipremium connections. For 22” and above, Vallourec provides expert guidance and supplies welded pipes fitted with Weld-on connectors.
Connections
Depending on the nature of their project, operators can choose from Vallourec’s BIG OMEGA®-IS or VAM® LOX connections.
LOD Casing offer for most common Geothermal needs
| OD range | 18 5/8'' | 20'' | 20'' | 22'' and above |
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| Casing pipes | Seamless | Welded (ERW) | Seamless | Welded | |
| Grades | K55, L80, T95, P110 | X65 / X80 | K55, L80 | X65/ X80 | |
| Connections | BIG OMEGA® -IS / VAM® LOX | Weld-on connectors |
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Proven connections for geothermal performance
Key features
- Can be threaded on both seamless and ERW (welded) pipes
- Easy and reliable make-up provides good running performance
- Available for 18 5/8″ pipes and 20″ pipes
- Flush ID prevents erosion and corrosion from geothermal turbulence
- 30 years of successful running with field-proven structural performance
BIG OMEGA®-IS for structural performance
The semi-premium connection BIG OMEGA®-IS* is perfectly adapted to geothermal projects where the surface casing must sustain structural loads and there is no risk of gas or fluid leakages. Its Internal Shoulder provides extra compression, torque and bending resistance.
- Robust, efficient and easy to use
- Rugged thread design with no risk of cross-threading or over-torque
- Fast and cost-efficient alternative to basic weld-on connectors
- Up to 100% MIYP (Minimum Internal Yield Pressure) of pipe body
VAM® LOX for exceptional sealability
VAM® LOX is a premium surface casing connection designed to meet the demanding conditions of geothermal wells. It combines structural integrity with gas tightness – an essential combination for many geothermal projects.
- Fast running and risk reduction
- Fitted with metal-to-metal seal
- Sealability certified as per API 5C5 CAL I (gas)
- Double start thread
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