Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent
1990-06-15
1992-08-18
Eldred, J. W.
Communications: electrical
Wellbore telemetering or control
Using a specific transmission medium
358100, 175 40, 166250, 3408563, 3408546, 385101, G01V 100
Patent
active
051403196
ABSTRACT:
An instrument probe contains a video camera and light source which is positioned in front of the camera for illuminating the passage being inspected, such as a bore or a casing. The power source for the instrument probe is located at the surface. A support cable contains an optical fiber for conducting camera signals to the surface and electrical conductors for conducting power from the surface to the instrument probe. The outer electrical conductor includes strands of copper alternating with and in electrical contact with strength member strands. The cable is enclosed in a stainless steel outer sheath. The support cable is coupled to the instrument probe by three fluid seals. The first seals the outer sheath in the probe. The second seals at the breakaway connection and the third seals at the probe bulkhead. The second and third seals include the use of adhesive caulking.
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International Search Report PCT/US 91/03485.
Eldred J. W.
Westech Geophysical, Inc.
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