Logging Cable
W1B-6.4 1×1.0 Single-Core Load-Bearing Well Logging Cable
The W1B-6.4 1×1.0 is a single-core load-bearing well logging cable built around a 7×0.43 mm stranded soft copper conductor, 0.70 mm modified polypropylene insulation and two layers of steel wire armor (18×0.64 mm inner, 18×0.79 mm outer). At 6.40 mm ± 0.05 mm overall diameter, 150 kg/km weight in air and 25 kN breaking force, it is sized to carry and lower logging instruments into the well.
Key Specifications
Conductor
7×0.43 mm stranded soft copper wiremm
Insulation
Modified polypropylene (PP), 0.70 mmmm
Inner Armor
Steel wire, 18×0.64 mmmm
Outer Armor
Steel wire, 18×0.79 mmmm
ISO 9001 Certified
CNPC & Sinopec Approved
Global Export Ready
Custom R&D Available
Technical Description
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Key Features
- Product Overview
- The W1B-6.4 1×1.0 is a single-core load-bearing cable for wireline logging. It transmits the logging signal between surface equipment and the downhole instrument, and it supports the weight of the tool string during run-in-hole and retrieval.
- The conductor is a 7×0.43 mm stranded soft copper wire. Stranding keeps the conductor flexible for repeated bending over wireline sheaves and through tool joints. Insulation is 0.70 mm of modified polypropylene (PP), which gives the cable stable electrical behaviour across a -30 to +150 °C working range.
- Mechanical protection comes from two independent steel wire armor layers: an inner layer of 18×0.64 mm wires and an outer layer of 18×0.79 mm wires. Together they provide the 25 kN breaking force that lets the cable carry a logging tool string, while the overall diameter stays at 6.40 mm ± 0.05 mm and the weight in air at 150 kg/km.
- Electrically the cable is rated for 1500 VDC withstand voltage. Insulation resistance at 20 °C is ≥ 200 MΩ·km, DC resistance is ≤ 18.1 Ω/km and capacitance is ≤ 0.17 μF/km. The bending diameter is 316 mm, which allows repeated cycling over sheaves during logging runs.
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Applications
- Wireline logging in oil and gas wells
- Deployment and retrieval of single-channel logging instruments
- Load-bearing suspension of downhole tools during logging runs
- Cased-hole and open-hole logging operations within the -30 to +150 °C temperature range
- Note: sour-service (H2S) capability and pressures or temperatures above +150 °C are not covered by the original datasheet and should be confirmed before specifying this cable for such conditions.
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FAQ
- Q: What is the W1B-6.4 1×1.0 logging cable used for?
- A: It is a single-core load-bearing well logging cable for wireline work: it carries the logging signal and supports the weight of downhole instruments during deployment and retrieval in oil and gas wells.
- Q: What is the cable diameter?
- A: 6.40 mm ± 0.05 mm.
- Q: What type of insulation does the cable use?
- A: Modified polypropylene (PP), 0.70 mm thick, rated from -30 °C to +150 °C.
- Q: What is the tensile (breaking) strength of the cable?
- A: 25 kN.
- Q: What is the operating temperature range?
- A: -30 °C to +150 °C.
- Q: What is the withstand voltage?
- A: 1500 VDC. Insulation resistance at 20 °C is ≥ 200 MΩ·km.
- Q: How is the armor constructed?
- A: Two steel wire layers: 18×0.64 mm inner armor and 18×0.79 mm outer armor.
- Q: What are the DC resistance and capacitance?
- A: DC resistance ≤ 18.1 Ω/km at 20 °C; capacitance ≤ 0.17 μF/km.
Application Scenarios
Downhole Logging Operations
Designed for wireline logging tools in oil & gas wells
Deep Well Exploration
Suitable for extreme depth and high-pressure environments
Perforating Operations
Pump-down and wireline perforating in production wells
High-Temperature Environments
Stable performance in geothermal and HPHT wells
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Conductor | 7×0.43 mm stranded soft copper wire | mm |
| Insulation | Modified polypropylene (PP), 0.70 mm | mm |
| Inner Armor | Steel wire, 18×0.64 mm | mm |
| Outer Armor | Steel wire, 18×0.79 mm | mm |
| Overall Diameter | 6.40 mm ± 0.05 mm | mm |
| Weight in Air | 150 | kg/km |
| Temperature Range | -30 to +150 °C | °C |
| Breaking Force | 25 | kN |
| Bending Diameter | 316 | mm |
| Withstand Voltage | 1500 | VDC |
| Insulation Resistance (20 °C) | ≥ 200 | MΩ·km |
| DC Resistance (20 °C) | ≤ 18.1 | Ω/km |
| Capacitance | ≤ 0.17 | μF/km |
Standards & Certifications
ISO 9001
Quality Management System
ISO 14001
Environmental Management
ISO 45001
Occupational Health & Safety
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