We supply drilling rotary hose according to API SEC 7K,and Kill hose and choke line hoses according to:API Spec. 16C / SY/T 5323-2003 standard.As a drilling mud system China manufacturer,many clients inquire us for drilling rotary hoses,Bumper hoses,Coflexip hoses,Chiksen etc.
API Spec. 7K drilling rotary hoses:
Drilling rotary hose, made according to API Spec. 7K standard, appliesfor 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, and also for adjusting the installation mistake between drilling pipe line and stand pipe to avoidshake. Rotary drilling hoses are another of our very popular products we offer, These hoses sometimes referd to as Kelly Hoseare used on the drilling rig and are large bore I.D high pressure flexible rubber steel lines used to connect the swivel to the standpipe. Made of heavy duty rubber and steel cables the Kelly hose flexible piping allows the Kelly and the bit and drill string to be raised and lowered while the drilling fluid is pumped through the drill string. The lowering of the drill string while pumping fluid is crucial to the drilling process. Usually made in diameters of 2″-2-1/2″-3″-3-1/2″ and 4″ i.d’s and in lengths from 30′ ft up to 85′ common length is 75′, 55′ and 65′.
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