The first reamer will be added to the drill string and reaming operations will commence. Throughout the reaming operations drilling fluid will be pumped through the drill string exiting through nozzles on the reamer, which provides a jetting action fluidizing the soils ahead of the cutting action of the reamer. The drill fluid will be pumped through the rig.During reaming operations the drilling fluid flow rate and the speed of drilling will be carefully controlled to ensure all of the drill cuttings are suspended within the drill fluid and removed from the bore.Drilling fluid returning to the surface through the annulus of the hole will be cleaned, reconditioned and re-used down hole.