Shear Bonding and Thermal Properties of Particle-Filled Polymer Grout for Pipe-in-Pipe Application

Pipe-in-Pipe (PIP) configurations are considered as a practical solution to deepwater oil production to prevent hydrate formation and paraffin deposition during the transportation of crude oil to production facilities. The optimal design of a PIP configuration requires a balance between the structural performance and the thermal insulation of the grout material used to fill the annular space. In this study, the effect of aggregates (4–19.1 mm) , sand (0.4–5 mm) , and microspheres (