Finding the reservoir, selecting the rig, drilling under challenging environment and maintaining safety drilling are essential for onshore drilling operation. Locating the field involves collecting seismic data and non – seismic data by using explosive, magnetometers and gravimeters. Appropriate rigs need to be selected after finding the reservoirs. It involves advance technologies such as Truck-Mounted Drilling Rig, Lightning Rig and Coiled Tubing Drilling (CTD) as well as expertises. Specialist equipments for exploration are required when drill under high temperature and high pressure as well as drill in toxic and corrosive sour gas wells. Formation fluids flow into the well can lead to kicks and blowout. Blowout preventers and other methods are required in order to maintain a safe drilling environment.