The world's energy sources are either renewable or non-renewable. Oil falls on the second kind of one. Initially, the crude oil extracted from the underground is actually a compound with oil, water, sand, salt, and natural gas. During the extracting process, these materials have to be maintained at the right pressure by the open and shutoff of a series of valves on the ground. The assembly composed by these valves is usually in red and named after the ‘Christmas tree’ on the ground of its resemblance to the pine decorated during the Christmas holiday. The words ‘ Christmas Tree ’ and ‘ Wellhead ’ are both used as synonymous at times; however, Xmas tree and wellhead are two distinct devices but with several things in common. For instance, they are both of great importance for oil and natural gas production; Valves and other equipment appear in both devices to help control and guide the flow of materials. Out of their similarities, they are often used as the same thi...