The goal of this research is to discuss the various objective of using Innovative drilling technologies in high pressure and high Temperature wells. The gas and oil Industry is growing rapidly and becoming more demanding because of the new reserves are being found in difficult atmospheres. Wells are being drilled at higher depth under High Pressure and Temperature situations (HPHT) which requires reliability of system to resolve the complexity because of High pressure and Temperature. Now a day HPHT is very famous word in petroleum industry. With higher pressures and temperatures, moving into deeper wells shows up the operating working window limited and therefore much problematic than conventional wells.