Thermal insulation material for subsea equipment

F - Mech Eng,Light,Heat,Weapons – 16 – L

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Details

F16L 59/00 (2006.01) C08K 5/16 (2006.01) C08K 7/28 (2006.01) C08L 81/04 (2006.01) E21B 36/00 (2006.01)

Patent

CA 2405367

The invention is an insulation material comprising a novolac cured polysulfide polymer resin. The material is used as a thermal insulator for subsea gas and oil production equipment, such as pipes and wellhead equipment. In order to decrease the maximum exothermic temperature generated by the resin during curing, hollow glass beads are added to the resin. The amine content of the hardener in a standard resin was adjusted to further decrease the maximum exothermic temperature. A fumed silica thixotropic material was also added to increase the viscosity of the mixture. These modifiations allow the material to be cast in thick sections without cracking, leaking, or excessive expansion during curing.

La présente invention concerne un matériau isolant comprenant une résine polymère au polysulfure durcie novolaque. Le matériau est utilisé en tant qu'isolant thermique pour du matériel de production de gaz et d'huile immergé tel que des conduites et du matériel de tête de puits. Afin de réduire la température exothermique maximum générée par la résine lors de son durcissement, des billes de verre creuses sont incorporées dans la résine. La teneur en amines du durcisseur dans une résine classique a été ajustée pour réduire un peu plus la température exothermique maximum. Une matière thixotrope de silice sublimée a également été ajoutée pour accroître la viscosité du mélange. Ces modifications permettent de couler le matériau sous forme de segments épais sans que ces derniers se fissurent, fuient hors du moule ou se dilatent excessivement pendant le durcissement.

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