3-Conductor Logging Cable (W3BP-5.6)

• 3-Conductor Wireline Logging Cable (W3BP-5.6) Reliable signal transmission and power supply for standard well conditions.

The W3BP-5.6 is a 3-conductor stranded wireline cable. It is engineered to provide stable multi-channel signal or power transmission in standard downhole temperature environments. With a 5.6mm outer diameter and dual-layer steel armor, it handles routine logging winch operations well. This is a standard workhorse cable for conventional logging operations.

• 🔍 Structural Breakdown (See cross-section diagram above) Every layer serves a specific purpose for downhole conditions:

Red (Stranded Copper Conductor): 7×0.21mm stranded construction. More flexible than solid wire, reducing the risk of breakage during frequent sheave runs. Yellow (PP Insulation): 1.20mm modified polypropylene. Provides basic electrical isolation. Light Blue (Core Screen): 3.0mm screen layer. Combined with the black semi-conductive filling, it reduces crosstalk between the three cores. Medium/Dark Blue (Dual Steel Wire Armor): 12×0.79mm inner and 18×0.79mm outer. Counter-rotating layers cancel torque and deliver a 25kN tensile strength.

• 📊 Performance Interpretation (Engineering Perspective) Mechanical (25 kN / 158 mm): 25kN is roughly 2.5 metric tons of breaking strength, suitable for standard to medium-depth wells. The 158mm minimum bending radius is critical—it ensures the cable passes smoothly over standard wellhead sheaves and truck-mounted spools without premature wire fatigue.

Temperature (-30°C to +150°C): Uses modified polypropylene (PP) insulation. If your bottom hole temperature (BHT) exceeds 150°C, this cable is not suitable. You should consider our F46 high-temperature series (up to 232°C). Electrical (≤84.3 Ω/km): At 20°C, the DC conductor resistance does not exceed 84.3 Ω/km. For a 3×0.24mm² cross-section, this is a standard and stable value. It is suitable for power and signal transmission within 1,500 meters. Beyond that, voltage drop calculations are required.

• 🛢️ Recommended Applications Conventional open-hole and cased-hole logging.

Production well monitoring and reservoir evaluation. Downhole tool power supply and data telemetry. Sour gas wells: A H₂S resistant (FL) version is available upon request. Need custom lengths or specialized armor? Contact our engineering team for a tailored solution.