| 摘要 |
An electric feedthrough unit particularly advantageous for application to a wellhead to interconnect an aboveground source of power with underground equipment comprises a tubular structure of steel, or other material having like properties of strength and resistance to distortion, and a rigid body of insulating material which is positioned within said tubular structure in a location intermediately of and spaced from its respective ends, one of which ends constitutes an upper end and the other a lower end when said electric feedthrough unit is applied to a wellhead. Electrically conductive elements are contained by and in recessed relation to the outer surface of said body of insulating material, spaced from the respective ends of said tubular structure. Said body of insulating material is interposed between said conductive elements and said housing to receive and transmit to said housing such forces and stresses and strains as are applied thereto directly, or indirectly. The arrangement provides that the connections to said conductive elements are well recessed within the limits of said body of insulating material. A flexible dielectric material which requires neither homogeneity nor perfect bonding to the parts to insure the integrity of the feedthrough unit is applied to fill the spaces within said tubular structure except for those areas where respective end portions of the electrically conductive elements must be bare for their use in connecting an aboveground source of power with below ground equipment.
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