Drilling hose (Rotary hose), made according to API 7K spec, applies for flexible hose connection between the top of oil drilling stand pipe and vertical moved swivel joint in well drilling, well cementing, work-over and down hole servicing operation. Drilling hose  is  also  used  to  adjust  the  installation  mistake  between drilling pipe line and stand pipe to avoid shake. Sometimes to transfer high pressure oil or water base mud with the lowest aniline point of 60℃ from the swivel pipe in high pressure, and downhole operation high medium such as water, oil etc., drilling rotary hose can be used for perfect work too.