Drilling
The oil well is created by drilling a long hole into the earth with an oil rig. A steel pipe (casing) is placed in the hole, to provide structural integrity to the newly drilled well bore. Holes are then made in the base of the well to enable oil to pass into the bore. Finally a collection of valves called a "Christmas Tree" is fitted to the top, the valves regulating pressures and controlling flows.
Read more about this topic: Extraction Of Petroleum
Famous quotes containing the word drilling:
“Don’t spend your time in drilling soldiers, who may turn out hirelings after all, but give to undrilled peasantry a country to fight for.”
—Henry David Thoreau (1817–1862)