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Circuit Router: Which Oilfield Hose Standard Governs Your Line
Three flexible lines on a drilling rig sit on three different circuits and are governed by three different API specifications. Answer three questions about where the line connects and this router names the family, the specification, the bore and pressure envelope Welong quotes, and what to put in the enquiry.
Three questions
Question 01
Where does the line connect?
MUD SIDEMud pump, standpipe manifold, swivel, top drive or gooseneck
CONTROL SIDEAccumulator unit or control panel to the BOP stack
STACK SIDEBOP stack outlets to the choke or kill manifold
SURFACE / TANKSTank, truck, pump skid or lease transfer
Question 02
What does it carry?
DRILLING FLUIDWater-based or oil-based mud, cuttings on return
HYDRAULIC FLUIDControl fluid that closes the preventer
WELL RETURNSReturns, kill fluid, gas, possible H₂S
PRODUCTCrude, diesel, saltwater, refined fuels
Question 03
Working pressure at the connection?
UNDER 1,000 PSITypically a transfer or suction duty
4,000 – 7,500 PSIStandard drilling and control classes
10,000 PSIHigh-pressure class, all three circuits
15,000 PSI AND ABOVEHPHT territory
Answer at least the first or second question to get a routing.
Routing
If a line on the mud, control or well-control circuit is what you actually need, change the first answer and the router will re-run.
| Parameter | Welong published figure |
|---|
Bore, pressure, temperature and construction figures shown by this router are Welong published product data. Test-pressure and burst ratios are not quoted here because their provenance differs by specification — that distinction is set out on the oilfield hoses hub.
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