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Home : Technical
Resources : Test Reports
DUOLINE is a well established
product having been used successfully in numerous countries in
any
and all oil field conditions, and as such, quality and safety trials
have been conducted on the full product range. We value the results
as part of the fundamental support of the quality and integrity
of our business. Please click on any one of the titles to view
the
article summary.
The testing summaries below illustrate a cross sampling of in-house
as well as customer funded testing that demonstrate DUOLINE’s
ability to perform in extreme conditions typically encountered by
oilfield tubulars.
DUOLINE 30 - LONG TERM EXPOSURE, 300°F,
4000 psi
DUOLINE TECHNOLOGY, ODESSA, TEXAS, 1999
DUOLINE 30 was tested in a procedure similar to that described
above. The tubing nipples were 3-1/2" OD L-80 threaded
with Nippon Steel’s NS-CT-FGL premium connection, which
features a positive torque shoulder, metal-to-metal seal and
a PTFE corrosion barrier ring. In this test the internal volume
was filled 1% volume NACE brine + 1% volume kerosene + 98%
volume with a gas mixture (1% Nitrogen, 4% H2S, 5% CO2, balance
Methane). The DUOLINE assembly was maintained at 300°F
(150°C) for 90 days at 4000 psi. The assembly was taken
apart for visual inspection at 15 day intervals, each time
a 100 psi/minute depressurization rate was maintained. The
liner was in good condition after this exposure, a few blisters
appeared on the liner inner surface.
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