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Thermoplastic Composite Pipes (TCP) have been receiving growing attention from the oil industry, as potential replacements for steel pipes, due to superior corrosion resistance, lighter weight, and other advantages (Shi C., et al., 2021). In the upstream segment, TCP have been already explored for subsea applications, as shown in (Barbosa, Bastos, De Boer, & Rojas-Díaz, 2019). This kind of application is relatively simpler than downhole scenarios, where high temperature and pressure can lead to complications. The present work aims to determine what kind of composite material should be pursued to enable downhole application for TCP. Numerical simulations were performed to understand the response of TCP to severe loadings, expected during operation of producer and injector wells. Simulated operations involved acid jobs, pressure tests and unexpected evacuation of tubing or annular pressure build-up (APB), due to thermal effects.

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Control line integrity is fundamental to ensure operability of intelligent completion systems. Damage to control lines can normally occur during string deployment (by shock), or during productive life (by vibration-related fatigue). This work aimed to investigate how encapsulation will affect control line survivability throughout their entire life cycle. Numerical simulations were carried out using geometrical arrangements of control lines typically found in completion valves and tubings. For installation loads, lines were submitted to shock simulations, both inside and outside of protection clamps. The role of flatpack material was studied, as to which kind of material would better absorb impact energy. For productive life loads, the flow-induced vibration was taken into account for high-rate injector wells. Vibration loads were based on force results obtained by Computational Fluid Dynamics (CFD). Structural Finite Element Analysis (FEA) was performed to obtain local tensions to estimate productive life of lines.