Geophysical Well Logging Cable For Oil And Gas Well
Instruction of well logging cable
Well logging cables are an essential component of the oil and gas industry, used to transmit data from downhole instruments to the surface for analysis. Here are some of the technical features and specifications of well logging cables:
Technical features
Construction: Well logging cables are typically made up of multiple conductors, which are insulated from each other and surrounded by a protective layer. The conductors may be made of copper, aluminum, or other materials, depending on the application.
Strength: Well logging cables must be strong enough to support the weight of downhole instruments as they are lowered into the well. They are typically made from high-strength steel or other materials that can withstand the stresses of the drilling process.
Electrical Properties: Well logging cables are designed to have low resistance and low capacitance to minimize signal loss and distortion. They are also shielded to protect against electromagnetic interference.
Temperature and Pressure Resistance: Well logging cables must be able to withstand high temperatures and pressures encountered in deep wells. They are often coated with materials that can resist corrosion and erosion from harsh downhole environments.
Parameter
| Construction | |
| Copper Construction | 19×0.26 mm |
| Insulation F46 | 0.35 mm |
| Protection F40 | 0.32 mm |
| Armor Inner | 12×0.79 mm(916N) |
| Outer | 18×0.79 mm(916N) |
| Physical | |
| Cable Diameter | 5.60 mm±0.10 mm |
| Cable Weight in Air | 145 kg/km |
| Temp Rating | 232 ℃ |
| Mechanical | |
| Cable Breaking Strength | 25 kN |
| Minimum Shave Diameter | 320 mm |
| Cable Stretch Coefficient | 2.5 m/km/5kN |
| Electrical | |
| Voltage Rating | 1200 VDC |
| Insulation Resistance | 15000 MΩ·km |
| Resistance Typical | 18.0 Ω/km |
| Capacitance @ 1 kHz | 190 pf/m |
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