The Full-Bore Flow Meter Mechanical Body (CSFM19) is connected to the bottom of the production logging instrument string and can accurately provide flow information in casing with a larger pipe diameter. The turbine section of the full-bore flow meter (mechanical body) is designed as a foldable turbine and cage structure, which can be retracted to the instrument’s outer diameter for easy deployment or retrieval through the tubing. The cage structure not only protects the turbine but also helps stabilize the instrument in high-angle wells.

The CSFM19 features a six-arm spring-type, HTF model, and is suitable for 7" casing.