GX-GG-2B1-2A1a-6.35 Optical Fiber Cable - 2 SM + 2 MM, 316L/A825 Armor - China Suppliers Factory
Applicable Well Types
1. Conventional Oil & Gas Wells
2. Unconventional Oil & Gas Wells
3. Other Exploration & Engineering Wells
Strictly Inapplicable Scenarios
Ultra Deep Wells (depth > 4000m): 10kN breaking strength cannot support total tension of cable weight + logging tool weight, high risk of cable breakage.
High Deviation Wells (> 60°) / Short Radius Horizontal Wells (build up rate > 12°/100ft): Insufficient torsion and friction resistance; minimum bending diameter (800mm) cannot match high build trajectories, easily causing fiber breakage and signal failure.
Ultra High Temperature Wells (bottomhole temperature > 150℃): Exceeds rated temperature, causing FEP insulation aging, increased fiber attenuation, and monitoring failure.
Severe Corrosive Wells (high H₂S/CO₂ concentration): Standard 316L/A825 stainless steel cannot resist long term severe corrosion, leading to armor rust and fiber damage.
Ultra High Pressure Wells (pressure > 140MPa): Exceeds rated pressure resistance, risking seal failure, structural damage, and safety hazards.
Selection Reference
| Parameter | Specification | Applicable Well Condition | Typical Well Type |
|---|---|---|---|
| Fiber Configuration | 2 single-mode (B1) + 2 multi-mode (A1a), 316L/A825 stainless steel fiber unit tube | DTS/DAS signal transmission, bottomhole temperature ≤150℃, no heavy mechanical load, fiber reserve length >3‰ | Conventional oil & gas wells, shale gas wells, coalbed methane wells |
| Temperature Resistance | Rated temperature 150℃ (302℉) | Medium-temperature working conditions, bottomhole temperature ≤150℃, no ultra-high temperature (>150℃) environment | Medium-deep conventional oil & gas wells, shallow geothermal wells, coal mine underground monitoring wells |
| Protection & Outer Diameter | Outer diameter 6.35mm±0.10mm, 316L/A825 stainless steel outer tube + FEP encapsulation, corrosion-resistant | Wellbore diameter ≥80mm, moderate wellbore wear, corrosive formation fluid (H₂S/CO₂/Cl⁻), rated pressure ≤100MPa | Medium-deep cased wells, open-hole wells, corrosive oil & gas wells |
| Mechanical Performance | Breaking strength 10kN, maximum working tension 5kN, minimum bending diameter 800mm, good flexibility and torsion resistance | Well depth ≤4000m, build-up section ≤60°, no sudden dogleg severity, horizontal section ≤1000m (long radius) | Medium-deep vertical wells, medium-deviation directional wells, long-radius horizontal wells |
Frequently Asked Questions (FAQ)
This cable is rated for well depths up to 4000m. Beyond this depth, the 10kN breaking strength is insufficient to support the combined tension of cable weight and logging tool weight, creating a high risk of cable breakage. For ultra-deep wells exceeding 4000m, a higher-strength cable solution is required.
The cable is suitable for medium-deviation directional wells with a build-up section of 60° or less, and long-radius horizontal wells with a horizontal section up to 1000m. It is not suitable for high-deviation wells exceeding 60° or short-radius horizontal wells with a build-up rate greater than 12°/100ft, as the minimum bending diameter of 800mm cannot accommodate such trajectories.
The cable includes 2 single-mode (B1) fibers and 2 multi-mode (A1a) fibers, housed in a 316L/A825 stainless steel fiber unit tube. This configuration supports both Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) applications, making it suitable for a wide range of downhole monitoring tasks including production monitoring, fracturing monitoring, and reservoir dynamic analysis.
The cable features 316L/A825 stainless steel outer tube construction with FEP encapsulation, providing moderate corrosion resistance against H₂S, CO₂, and Cl⁻ formation fluids under standard conditions. However, it is not suitable for severely corrosive wells with high concentrations of H₂S or CO₂, as prolonged exposure can cause armor rust and fiber damage beyond the material's rated resistance.
The cable has a rated temperature limit of 150℃ (302℉) and a rated pressure resistance of up to 100MPa (with an absolute maximum of 140MPa). It is not suitable for ultra-high temperature wells exceeding 150℃, as elevated temperatures cause FEP insulation aging and increased fiber attenuation. Wells with pressures exceeding 140MPa risk seal failure and structural damage.
Yes. This cable is well-suited for unconventional resource applications including shale gas long-radius horizontal wells (horizontal section ≤ 1000m), coalbed methane (CBM) development wells (depth ≤ 2500m), and tight oil & gas development wells. Typical uses include fracturing monitoring, production profile monitoring, and permanent downhole monitoring in unconventional reservoirs.