GX-GG-2B1-2A1a-6.35 PI ( 1/4”), 6.35mm, 2 SM+2 MM, 316L/A825 Armor Optical Fiber
Applicable Well Types
1. Conventional Oil & Gas Wells
Adaptable Well Types: Deep vertical wells (depth ≤ 5000m), medium-deviation directional wells (build-up section ≤ 60°), deep cased wells, deep open-hole wells, high-temperature exploration wells.
Typical Applications: High-temperature deep oil & gas exploration, production dynamic monitoring of high-temperature wells, deep open-hole logging, permanent downhole monitoring.
2. Unconventional Oil & Gas Wells
Adaptable Well Types: High-temperature shale gas long-radius horizontal wells (horizontal section ≤ 1000m), deep coalbed methane wells, high-temperature tight oil & gas wells.
Typical Applications: High-temperature shale gas horizontal well monitoring, deep CBM well monitoring, tight oil & gas dynamic monitoring, high-temperature zone fracturing effect evaluation.
3. Other Exploration & Engineering Wells
Adaptable Well Types: Medium-deep high-temperature geothermal wells (bottomhole temperature ≤ 300℃), deep hydrogeological wells, high-temperature engineering monitoring wells.
Typical Applications: High-temperature geothermal resource monitoring, deep hydrogeological detection, high-temperature downhole monitoring projects.
Strictly Inapplicable Scenarios
1.Ultra-deep wells (depth > 5000m): Exceeds mechanical bearing limit, high risk of breakage.
2.High-deviation wells (> 60°) / short-radius horizontal wells (build-up rate > 12°/100ft): Cannot adapt to sharp bending, easy to cause fiber damage.
3.Ultra-high temperature wells (> 300℃): Exceeds temperature resistance, leading to insulation failure and signal attenuation.
4.Severe corrosion environment with ultra-high H₂S/CO₂: Long-term severe corrosion may damage the structure.
5.Ultra-high pressure > 100MPa: Exceeds pressure rating, risk of seal failure.
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 ≤300℃, no heavy mechanical load, fiber reserve length >3‰, high-temperature stable signal transmission |
High-temperature deep conventional oil & gas wells, high-temperature shale gas wells, deep coalbed methane wells |
Temperature Resistance |
Rated temperature 300℃ (572℉), PI (polyimide) insulation layer, high-temperature resistance, no aging under 300℃ long-term operation |
High-temperature working conditions, bottomhole temperature ≤300℃, no ultra-high temperature (>300℃) environment, high-temperature downhole long-term monitoring |
High-temperature deep oil & gas wells, high-temperature geothermal wells, high-temperature unconventional oil & gas wells |
Protection & Outer Diameter |
Outer diameter 6.35mm±0.10mm, 316L/A825 stainless steel outer tube + PI encapsulation, corrosion-resistant, high-temperature resistant, pressure-resistant |
Wellbore diameter ≥80mm, moderate wellbore wear, corrosive formation fluid (H₂S/CO₂/Cl⁻), rated pressure ≤100MPa, high-temperature downhole environment |
Deep cased wells, deep open-hole wells, high-temperature corrosive oil & gas wells, high-temperature geothermal wells |
Mechanical Performance |
Breaking strength 10kN, maximum working tension 5kN, minimum bending diameter 800mm, good flexibility and torsion resistance, high-temperature mechanical stability |
Well depth ≤5000m, build-up section ≤60°, no sudden dogleg severity, horizontal section ≤1000m (long radius), high-temperature downhole tension and friction conditions |
Deep vertical wells, medium-deviation directional wells, high-temperature shale gas long-radius horizontal wells, deep coalbed methane wells |
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