THE PRINCIPLE OF ROTARY DRILLING

THE PRINCIPLE OF ROTARY DRILLING

THE PRINCIPLE OF ROTARY DRILLING is based upon a revolving shaft or drill stem which is hollow and has a fluid of mud or other substance flowing through it for the purpose of floating or circulating cuttings to the surface. There is a several-fold purpose for the fluid. First - for the removal of the cuttings; second - for cooling of the drill stem rotating in the bore hole; third - sealing of formation walls to prevent caving and water loss.