Casing flotation is mainly used in horizontal wells and in large displacement wells. When the casing is under casing, the floating collar is connected to the casing string to form a temporary barrier in the casing. The casing string below the floating collar is filled with air while the floating The collar above the collar is filled with drilling fluid. This increases the buoyancy of the part of the casing string below the floating collar so that the lower casing string floats during the lower casing and reduces the resistance of the lower casing. Due to the floating collar, Filled with drilling fluid, thereby increasing the pressure into the wellbore casing string to achieve smooth casing into the next. Casing floating components are mainly floating collar, a dedicated float hoop, float shoes, and the use of supporting the use of plastic plug and the next rubber stopper.