| 摘要 |
The invention relates to a cable suitable for supplying power to a top-drive assembly on a drilling rig. In a typical embodiment, the power cable includes a central conductor (1), a central conductor insulation layer (2), electromagnetic shielding (5) enclosing the central conductor, a first polymeric sheath (6), a reinforcing layer (3) and a second polymeric sheath (4) enclosing said reinforcing layer. According to the invention, the reinforcing layer is made of a densely packed braid covering between 95% and 100% of the surface of the first polymeric sheath. |
