Pipes na Casing da ba za a iya dawo da su ba (Asara)

Pipes na non-retrievable casing, wanda aka sani da sacrificial ko permanent casing installations, wakilishi ya fasaha ta drilling ta musamman da ake amfani da ita a cikin micropile foundation work inda steel casing ta kasance a cikin borehole maimakon a cire ta bayan an kammala drilling. Fasahar ta ake amfani da ita a cikin geotechnical applications da dama inda yanayin kasa, tattalin arziƙi na aikin, ko buƙatun structural suka sa permanent casing integration ya zama mafita mai kyau. Aikin haka ya ƙunshi driving ko rotating casing strings cikin ƙasa lokacin shigar da micropile, tare da outer diameters da ke kaiwa daga 60mm zuwa 300mm, dangane da buƙatun load-bearing da buƙatun tsabta na borehole. Lokacin da drill bit ta ci gaba ta hanyar casing da ta shiga cikin bearing stratum, ake yanke shawara don barin casing a wuri dangane da taro na ƙasa, yanayin ruwan ƙasa, da takardun tsara don micropile system.