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Sandberg Chester L: Methode de regulation dun appareil de chauffage, Method for monitoring a heater. Raychem Corporation, FETHERSTONHAUGH & CO, October 24, 1989: CA1262470

ABSTRACT OF THE DISCLOSURE Method for monitoring the electrical integrityof a heater and a novel heater for use in such amethod. The heater includes an elongate heatingmember; an insulating jacket which encloses theheating member; a first electrically conductivemember which surrounds the insulating ...


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Sandberg Chester L, Fowler Thomas D, Vinegar Harold J, Schoeber Willem Jan Antoon H: In situ conversion process utilizing a closed loop heating system. Shell Int Research, zhude qiang, April 16, 2008: CN200680013121

A system for treating a hydrocarbon containing formation is described. The system includes two or more groups of elongated heaters . A group includes two or more heaters (242) placed in two or more openings in the formation. The heaters in the group are electrically coupled below the surface of the ...


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Clarke Raymond, Sandberg Chester L: Thermosondage par fibre optique, Fiber optic temperature sensing. Raychem Corporation, FETHERSTONHAUGH & CO, July 24, 1984: CA1171502

RAYCHEM CORPORATION MP0722/723 ABSTRACT CONTROLLING TEMPERATURE WITH FIBER OPTICS Method and apparatus for controlling temperature of amaterial by means of an optical waveguide having a core andcladding, the refractive index. of the core becoming lowerthan that of the cladding to induce blackout of ...


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Sandberg Chester L, Highe Albert J, Gamarra Jose, White Lawrence J, Orecchia Frank, Aune Ted M: Electric cable having braidless polymeric ground plane providing fault detection. Tyco Electronics Corporation, GERSTNER Marguerite E, May 10, 2001: WO/2001/033908

An electrical cable device such as a heating cable (100) includes a braidless ground return layer (102) surrounding an inner jacket (18). The ground return layer (102) is formed by a conductive polymer and a ground return wire (104) connected to the conductive polymer. The polymer may be made suitab ...


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Sandberg Chester L, Highe Albert J, Gamarra Jose, White Lawrence J, Orecchia Frank, Aune Ted M: Electric cable having braidless polymeric ground plane providing fault detection. Tyco Electronics, January 8, 2003: EP1273206-A1

An electrical cable device such as a heating cable (100) includes a braidless ground return layer (102) surrounding an inner jacket (18). The ground return layer (102) is formed by a conductive polymer and a ground return wire (104) connected to the conductive polymer. The polymer may be made suitab ...


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Vinegar Harold J, Sandberg Chester L, Harris Christopher K: Temperature limited heaters used to heat subsurface formations. Shell Int Research, zhaopei xun, May 2, 2007: CN200580016609

The invention provides a heater, comprising: a ferromagnetic member; an electrical conductor electrically coupled to the ferromagnetic member, wherein the electrical conductor is configured to provide heat output below the Curie temperature of the ferromagnetic member. The electrical conductor is co ...