The article focuses on characterization of leak rates under high static and cyclic pressure loads in thermoplastic barrier seals used in gas lift valves. The objective of the study is to validate the seal design for gas lift valves and check if its sealing material would meet the stringent leakage requirements laid out in the Statoil standards. The Statoil has a stringent leakage requirement of ≤2sccm with gases and a pressure drop of ≤1% of the applied pressure differential with liquids. For convenience of the study only the barrier check valve portion of the actual gas lift valve is tested. It includes a spring, check dart, a portion of the flow bore, a portion of the nose (housing the dart) and the check seal. For leak tests at pressures up to 2000psi, a standard nitrogen bottle was used and for higher pressures up to 10,000psi, a boost pump was employed. In addition, the test rig was designed to generate accelerated cyclic loads to study the effect of it on leakage characteristics of the seal. Finite element analysis (FEA) on the seal design under 100 and 10,000psi validated the stress-strain states in seal and predicted the sealing contact pressures. It was observed that the new seal design satisfies the Statoil requirements after an initial pressure cycle. In addition, it is observed that leak rates are unaffected by the accelerated loading cycles.
Journal of Petroleum Science and Engineering – Elsevier
Published: Sep 1, 2016
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera