G1F46-3.18 1/8 Single-Conductor Micro Logging Cable - China Suppliers & Factory, 316L/825 Armor, 18 AWG
Applicable Well Types
1 Small-Bore / Micro-Bore Wells (Best Matching Core Advantage)
Well Condition Features: Wellbore diameter ≤ 100mm, thin-walled casing wells (e.g., φ73mm/φ89mm casing), small-diameter open holes, and medium-shallow wells with depth ≤ 2000m.
2 Medium-Temperature Corrosive Oil & Gas Wells (Matching Temperature Resistance + Corrosion Resistance)
Well Condition Features: Conventional/unconventional shallow oil & gas wells with bottomhole temperature of 150℃–200℃, containing corrosive media such as H₂S/CO₂/Cl⁻, and well depth of 1000–3000m.
3 Medium-Shallow Conventional Vertical Wells / Low-Deviation Directional Wells
Well Condition Features: Vertical wells or low-deviation directional wells with build-up sections ≤ 45°, well depth ≤ 3000m, bottomhole temperature ≤ 200℃, and no complex trajectories with high torque or friction.
4 Shallow Geothermal Wells / Medium-Temperature Hydrogeological Wells
Well Condition Features: Medium-temperature shallow geothermal wells and hydrogeological exploration wells with bottomhole temperature of 120℃–200℃, well depth ≤ 2500m, and some intervals containing high-salinity formation water.
5 Shallow Coalbed Methane Wells / Underground Coal Mine Logging Wells
Well Condition Features: Shallow coalbed methane development wells (depth ≤ 1500m) and small-diameter detection wells in underground coal mines, with environments containing trace methane and highly corrosive formation water.
Strictly Inapplicable Scenarios
1. High-deviation wells (>60°) / long-horizontal-section horizontal wells (horizontal section >500m).
2. Deep / ultra-deep wells (depth >4000m).
3. Ultra-high temperature wells (bottomhole temperature >200℃).
4. Tool weight >80kg will quickly exceed the maximum recommended working tension (2.75kN), significantly reducing cable service life or causing immediate breakage.
5. Large-bore wells (wellbore diameter >200mm).
Selection Reference
| Parameter | Specification | Applicable Well Condition | Typical Well Type |
| Conductor Structure | 7×0.21mm tinned copper wire (≈23 AWG), total cross-sectional area ≈0.242mm² | Suitable for weak current signal transmission, no heavy current load, applicable to medium-temperature working environment | Small-bore wells, medium-shallow conventional oil & gas wells, geothermal exploration wells |
| Insulation Material | FEP (fluoroplastic), temperature rating 200℃ (392℉) | Bottomhole temperature ≤200℃, no ultra-high temperature environment, applicable to wells with corrosive formation fluid | Medium-temperature corrosive oil & gas wells, shallow coalbed methane wells, medium-temperature geothermal wells |
| Protection Structure | 316L/A825 stainless steel tube armoring, outer diameter 3.18mm±0.076mm | Small-bore (wellbore diameter ≤100mm), moderate wellbore wear, wells containing corrosive media (H₂S/CO₂/Cl⁻) | Small-bore/micro-bore wells, thin-walled casing wells, underground coal mine logging wells |
| Mechanical Performance | Breaking strength 5.5kN, maximum working tension 2.75kN, minimum bending diameter 350mm | Well depth ≤3000m, build-up section ≤45° (conditionally ≤60°), no high torque or high friction working conditions | Medium-shallow vertical wells, low-deviation directional wells, long-radius horizontal wells with short horizontal section (≤500m) |
Frequently Asked Questions
Q What is the maximum well depth this cable is recommended for?
This cable is optimally suited for wells with a depth of up to 3000m. For deep or ultra-deep wells exceeding 4000m, it is strictly not recommended due to limitations in mechanical tension capacity and signal integrity over extended cable runs.
Q Can this cable be used in wells containing H₂S or CO₂ corrosive media?
Yes. The 316L/A825 stainless steel tube armoring provides robust corrosion resistance against H₂S, CO₂, and Cl⁻ environments, making it well-suited for medium-temperature corrosive oil & gas wells, shallow coalbed methane wells, and hydrogeological wells with high-salinity formation water.
Q What is the maximum bottomhole temperature this cable can withstand?
The FEP fluoroplastic insulation provides a temperature rating of 200℃ (392℉). Therefore, the cable is applicable to bottomhole temperatures up to 200℃. It is strictly not suitable for ultra-high temperature environments exceeding this threshold.
Q Is this cable suitable for horizontal wells or high-deviation directional wells?
This cable is suitable for low-deviation directional wells with build-up sections ≤ 45° and conditionally up to 60°. It is not recommended for high-deviation wells exceeding 60° or horizontal wells with a horizontal section longer than 500m, as these conditions can generate excessive torque and friction beyond the cable's mechanical tolerance.
Q What is the maximum tool weight that can be safely used with this cable?
The maximum recommended working tension of the cable is 2.75kN, with a breaking strength of 5.5kN. Tool weights exceeding 80kg will quickly surpass the working tension limit, risking significant reduction in cable service life or immediate cable breakage. It is essential to ensure tool weight remains within safe operational limits.
Q What wellbore diameter range is this cable designed for?
This cable, with its outer diameter of 3.18mm±0.076mm, is specifically designed for small-bore and micro-bore wells with a wellbore diameter of ≤ 100mm, including thin-walled casing wells such as φ73mm and φ89mm casings. It is not suitable for large-bore wells with a wellbore diameter exceeding 200mm.