Na'urorin madadin don ayyukan cluster down-the-hole (DTH) drilling suna wakiltar mahimmanci na na'urar zamani na displacement piling a cikin gina foundation. Cluster DTH configurations suna amfani da percussion hammers da aka shirya a kusa ko a cikin salon da aka tsara don yin boreholes a lokaci guda don shigar da pile na diameter girma, musamman a cikin muhallin geotechnical da ke da kalubale. Na'urorin madadin da ke goyon bayan ayyukan wadannan sun hada da kayan aikin na musamman, adapters, casings, stabilizers, bit guidance systems, da kayan aikin na madadin da ke inganta ayyukan drilling, tabbatar da tsarin borehole da kuma inganta ayyukan ayyuka a cikin yanayin kasa da ke da kalubale. Na'urorin goyon bayan suna da tsari don ayyuka tare da na'urorin DTH drilling na asali, suna karbi da bukatar musamman na salon cluster inda aka shirya drill strings a kusa da juna a lokaci guda wajen kiyaye drilling verticality da kuma borehole quality standards wacce ake bukata don shigar da pile da kuma ayyukan ground displacement.