Non-Retriyvabl (Lost) Kasin Paip

Non-retrievable casing pipes, also known as sacrificial or permanent casing installations, represent one specialized drilling technique wey dey employed in micropile foundation work where steel casing remain in place within borehole rather than being extracted after drilling completion. Dis methodology dey utilized across diverse geotechnical applications where ground conditions, project economics, or structural requirements make permanent casing integration di optimal solution. Practice involve driving or rotating casing strings into ground during micropile installation, with outer diameters wey typically range from 60mm to 300mm, depending on load-bearing requirements and borehole stability needs. Once drill bit advance through casing and penetrate bearing stratum, decision to leave casing in place dey made based on soil composition, groundwater conditions, and design specifications for micropile system.