I In the oil and gas exploration business, drilling works are carried out by designing the formation hole according to the target to get the target in the formation, while the purpose of perforating the formation is so that the hydrocarbons that will be produced come out and come to the surface. One of the parameters of the success of a drilling activity is the casing design which is technically safe and good in terms of economics. The purpose of writing this Final Project is to evaluate the design of the casing in the "SGW" well "GNJ" field. The purpose of this casing design evaluation is to get the right and economical size of the casing against the existing options, as well as having a strong casing grade to withstand the pressure arising from loading the casing. In this thesis using a graphical method and calculation analysis. The graphical method is used to determine the optimal grade, so that drilling costs can be more economical, while the calculation analysis is used to determine the price of the safety factor of each grade of the casing. From the calculation of the loads that work on the casing and the results of the plot between burst and collapse loads, it will be known whether the casing pipe is not safe, safe enough or too safe so that it can cause danger.