... pressure 3 competitive prices 4 Swaged coupling, forged union The rotary hose, made according to API Spec. 7K standard, applies for ... top of oil drilling stand pipe and vertical moved swivel joint in well drilling, well cementing, work-over and down hole ... , oil and mud etc.. A, B, C Rank Well Drilling Rotary Hose Specification and Basic Parameters I.D.O.D.RankWorking ...