Oil Drilling Oil and natural gas furnish about three-fourths of our energy needs, fueling our homes, work places, factories and transportation systems. Using variety of methods, on land and at sea, small crews of specialized workers search for geologic formations that are likely to contain oil and gas. Seismic prospecting - a technique based on measuring the time it takes sound waves to travel through underground formations and return to surface-has revolutionized oil and gas exploration. After finding the presence of oil beneath the ground, the most important conventional technique known as Rotary Drilling is employed and oil is extracted from the oil well. Advanced techniques like Horizontal Directional Drilling and Drilling with Laser can also be employed in Oil drilling