A large-diameter (3- to 5-in inside diameter), high-pressure flexible line used to connect the standpipe to the swivel. This flexible piping arrangement permits the kelly (and, in turn, the drillstring and bit) to be raised or lowered while drilling fluid is pumped through the drillstring.
The simultaneous lowering of the drillstring while pumping fluid is critical to the drilling operation.
Rotary Drilling Hose
Rotary drilling hose is mainly used for conveying water-based or oil-based mud and other fluids in the working temperature of -30 °C to +82 °C.
It is often used for oil fields, cement repairing, geological exploration and water conveyance for coal excavation. It is composed of three parts: tube, reinforcement and cover.
The tube is made from NBR, which is resistant to abrasion, corrosion and oils. The reinforcement is made from 2-8 layers of high tensile and high strength spiraled steel wire, making the hose have solid structure and resistant to high pressure.
The cover is made from high quality synthetic rubber, mainly chloroprene rubber, making the hose resistant to abrasion, corrosion, cut, weather, ozone, aging and sunlight. The hose has longer service life as a result.
Rotary Drilling Hose Features & Benefits:
Designed for high working temperature and sour service mud delivery
The hose is capable of handling 20% H2S (HydrogenSulphide) for 1 hour at 121° C at rated working pressure
See underbalanced drilling hoses for gas, air and foam drilling
See managed pressure drilling hoses for managed pressure drilling (MPD) and dual gradient drilling (DGD)