| 摘要 |
<p>An instrument probe (12) contains a camera (38) and light source (28) which is positioned in front of the camera for illuminating the passage (14) being inspected, such as a bore or a casing. The power source for the instrument probe is located at the surface. A support cable (16) contains an optical fiber (50) for conducting camera signals to the surface and electrical conductors (54, 60) for conducting power from the surface to the instrument probe. Outer electrical conductors (60) in the cable are alternating with and in electrical contact with strength member strands (58). The cable is enclosed in a stainless steel outer sheath (62). The support cable is coupled to the instrument probe by three fluid seals (64, 73, 76). The first (64) seals the outer sheath in the probe. The second (73) seals at the breakaway connection and the third (76) seals at the probe bulkhead (74). <IMAGE></p> |
