Application of 7Inch Casing in Geothermal Well Project

With the rapid development of geothermal energy exploitation, 7 inch API 5CT casing (177.8mm) has become the most widely used production casing for medium and deep geothermal wells.

Geothermal wells work under long-term high temperature, thermal cycle stress, formation extrusion and weak brine corrosion. Ordinary water well casing cannot adapt to such complex working conditions. The 7” 117.8mm casing features thick wall, high collapse resistance and stable thread sealing, which is specially suitable for geothermal well projects.

1. Excellent thermal stability

The thick wall structure effectively resists thermal expansion and contraction deformation, avoiding pipe bulge, thread leakage and casing damage under long-term temperature cycling.

2. High collapse resistance

117.8mm heavy casing can bear high formation external pressure, prevent well wall collapse and ensure long-term wellbore stability.

3. Reliable thread connection

BTC buttress thread provides high connection strength, anti-loosening performance and perfect sealing effect, which is the best choice for geothermal engineering.

4. Dual-purpose for production and reinjection

This size casing is widely used in both geothermal water production wells and reinjection wells, which is the standard mainstream specification for geothermal projects.

We supply full range 7” 177.8mm API 5CT geothermal casing with complete test documents, API certificates and factory inspection reports. Support customized length, premium threading and export packaging.