Construction Technology of the First Grave-filled Geothermal Well in Renqiu

Abstract:

High sand content rate and unstable borehole wall exist in common geological well in Renqiu, and the gradation of 178mm pipe and 311mm diameter was chosen for the first gravel-filled geological well in this area. Borehole construction was completed under the logging instrument monitoring and mud property control; well construction was completed by -breaking mud layer of the wall and gravel-filling in static water level. It was proved the construction technology was feasible and quality of well completion was reliable by operation test.