Accelerated Degradation Testing for Long-Term Strength Prediction of Nonmetallic Pipes in Downhole Applications - CANCELLED (C2026-00346)
CANCELLED
Interested in reading the entire paper? Click on the "Paper" button below to read on the AMPP Knowledge Hub!
*Please note, if your registration came with access to the conference proceedings don't forget to login to your AMPP Knowledge Hub account to access the paper for free. If you login and don't have access to the paper, you can purchase the individual paper or purchase the entire conference proceedings on your Knowledge Hub account.
Lina Tahini, Hasan Alhashmy, Ali Hijles, Nuran Bawarith
Nonmetallic pipes are increasingly used in Oil & Gas applications due to their corrosion resistance and acceptable strength. This work aims to develop an accelerated degradation method to evaluate the long-term structural integrity of filament-wound Iglass fiber-reinforced polymer (GFRP) composite pipes used in downhole oil and gas applications. GFRP samples, with fiber orientations of ±55° and ±85°, were extracted in axial and hoop directions and tested under tensile loading following ASTM standards. Testing conditions included: (a) as-received, (b) degradation in 5% salt solution (for 750, 1500, 3000 hours at 70-80 °C, and (c) degradation in used diesel oil for the same duration and temperature. Results showed a significant reduction in tensile modulus (E) and ultimate tensile strength (UTS) in salt-exposed samples compared to oil-exposed ones, attributed to salt ingress into the laminate. However, full-scale pipe testing under burst conditions showed minimal structural impact, likely due to the slower diffusion rate in thicker pipe walls.Experimental data were modeled using a natural logarithmic function based on Arrhenius law for long term degradation prediction, adopting a conservative approach. This work is groundbreaking on developing a standardized method for assessing the durability of GFRP pipes in aggressive downhole environments.
