(Built-in Couplings) Unbalanced Drilling Hose UDG-SZ

• application:

• used f delivery of high pressure drilling fluid mixed with gas while unbalanced drilling technology applied , such as drilling fluid mixed with nitrogen, air, mixed gas air nitrogen, natural gas. gas mixed is f foaming lighting fluid weight

• stard: api spec 7k

• api monogram no.: 7k-0458

• hose structure:

inner tube: polymer engineering plastic

inner rubber layer: hnbr based inner rubber layer, oil resistance, crosion resistance, high temperature resistance, gas permeation resistance

breaker layers external protection layers: high tension textile fabric

maj reinfcement f withsting pressure: high strength steel cable

cover: neoprene rubber based cover, fire-proof, wear resistance, oil resistance, ozone/ageing resistance, uv resistance, which is applicable f challenging marine environment.

• fire proof grade:

general hose meets the requirements on general fire protection grade sr6a, 704° c (1300° f) ×5min

the hose can be coated with a fireproofing anti-flaming layer (fiberglass fire protection layer), it meets the requirements on high fire protection grade sr6b, 704° c (1300° f) ×30min

• embedded electric heat trace cable is available as request f low temperature operating condition.

• different option of external protection layer are available as request by our recommendation accding to specific operation condition, f example stainless steel arm outer wrap, embedded stainless steel wire in cover, polyethylene spiral guard, etc.

• wking temperature range: class ⅱ , -25 to +100 ℃

• flexibility specification level: fsl3

• maximum length: 70m

• length tolerance: length up to 6.4m, with tolerance ± 64 mm; length longer than 6.4m with tolerance ± 1％

• measurement basis of minimum bending radius (mbr) is center line of each hose