(FR2758009-A1)      The generator comprises a number of thermoelectric modules that are attached concentrically to the outer wall of piping (10) that when in use is immersed in sea water and carries flowing petroleum products that are extracted from a subsea production shaft. The modules are disposed in dishes (16) formed on the outer lateral wall of the piping. The dishes are sealed closed through use of covers (32) that are made from a thermally conductive material. Each cover, together with walls of the dish, and peripheral edges of the module creates a sealed chamber. The sealed chambers communicate with one another. The chambers are filled with a soft heat-insulating resin. At least one of the covers has an aperture (56) for filling the resin, the aperture being closed by a sealed deformable component (58) which allows the hydrostatic pressure of the external sea environment to be transmitted to the resin which fills the sealed peripheral chambers (4).    USE -   For use on equipment that is provided on the heads of drilling shafts. For use with drilling piping that is immersed in water, and in which there flows a petroleum product. For liquefaction of plugs of paraffin which are deposited on inner wall of pipes for transporting petroleum products.    ADVANTAGE -   The thermoelectric modules are insulated against sea water and are protected against the action of the hydrostatic pressure exerted by the sea water.    (GB2320733-B)      The generator comprises a number of thermoelectric modules that are attached concentrically to the outer wall of piping (10) that when in use is immersed in sea water and carries flowing petroleum products that are extracted from a subsea production shaft. The modules are disposed in dishes (16) formed on the outer lateral wall of the piping. The dishes are sealed closed through use of covers (32) that are made from a thermally conductive material. Each cover, together with walls of the dish, and peripheral edges of the module creates a sealed chamber. The sealed chambers communicate with one another. The chambers are filled with a soft heat-insulating resin. At least one of the covers has an aperture (56) for filling the resin, the aperture being closed by a sealed deformable component (58) which allows the hydrostatic pressure of the external sea environment to be transmitted to the resin which fills the sealed peripheral chambers (4).    USE -   For use on equipment that is provided on the heads of drilling shafts. For use with drilling piping that is immersed in water, and in which there flows a petroleum product. For liquefaction of plugs of paraffin which are deposited on inner wall of pipes for transporting petroleum products.    ADVANTAGE -   The thermoelectric modules are insulated against sea water and are protected against the action of the hydrostatic pressure exerted by the sea water.    (US5939667-A)      The generator comprises a number of thermoelectric modules that are attached concentrically to the outer wall of piping (10) that when in use is immersed in sea water and carries flowing petroleum products that are extracted from a subsea production shaft. The modules are disposed in dishes (16) formed on the outer lateral wall of the piping. The dishes are sealed closed through use of covers (32) that are made from a thermally conductive material. Each cover, together with walls of the dish, and peripheral edges of the module creates a sealed chamber. The sealed chambers communicate with one another. The chambers are filled with a soft heat-insulating resin. At least one of the covers has an aperture (56) for filling the resin, the aperture being closed by a sealed deformable component (58) which allows the hydrostatic pressure of the external sea environment to be transmitted to the resin which fills the sealed peripheral chambers (4).    USE -   For use on equipment that is provided on the heads of drilling shafts. For use with drilling piping that is immersed in water, and in which there flows a petroleum product. For liquefaction of plugs of paraffin which are deposited on inner wall of pipes for transporting petroleum products.    ADVANTAGE -   The thermoelectric modules are insulated against sea water and are protected against the action of the hydrostatic pressure exerted by the sea water.