| 摘要 |
A method of manufacturing a downhole electrical cable comprises arranging an elongate member (3) adjacent to a flat elongate sheet (1) of material, where the length of the elongate member (3) is greater than the length of the sheet (1). The sheet (1) is then formed into a cylindrical shape (5) around the elongate member (3), and the adjacent longitudinal edges (7) of the cylindrical shape (5) are joined, preferably by seam welding, to form the sheet (1) into a tube (5) with an end of the elongate member (3) adjacent each end of the tube (5). Thereafter, an elongate conductor (9) is connected to one end of the elongate member (3), and the other end of the elongate member (3) is pulled to draw the conductor (9) through the tube (5) until the elongate member (3) is removed from the tube (5) and the conductor (9) is located within the tube (5). At this final point in the method, a respective end of the conductor (9) is adjacent each end of the tube (5). The fluid barrier device (13) may be inserted between the tube (5) and the conductor (9). The fluid barrier device (13) may be made of epoxy resin. |
