Oil Well Temperature Sensing Cable

Application Scenarios

Temperature and pressure measurement in high-temperature oil wells.
Temperature and pressure measurement in high-temperature gas wells.
Temperature monitoring of above-ground high-temperature equipment (such as high-temperature furnaces).

Product Features

Extremely wide temperature adaptability: -180℃ to 700℃ for long-term use, up to 750℃ maximum; certain specifications are available for the -60~150℃ and -180~300℃ ranges.
Excellent cable mechanical performance, meeting the demanding requirements of downhole operations.
Fully sealed structure, withstanding ≥60 MPa, with outstanding high-pressure resistance.
Protected by three layers of metal tubes (aluminum tube, stainless steel inner tube, outer stainless steel tube), with strong resistance to high corrosion and high temperature.

Color Coding

(1) Fiber Color (for 1-2 fibers)
The tight-buffered fiber color isnatural, and when the fiber count is expanded, industry-standard color coding (blue, orange, etc.) can be applied.
(2) Cable Color
Metallic (natural color of the three-layer metal tubes)
Note: The default color of the outer jacket (outer stainless steel tube) of standard oil well temperature sensing cables is natural metal; surface treatment can be customized as required.

Environmental Compliance

Item	Unit	Specification	Single-Side Thickness (mm)
Optical Fiber	mm	0.25	-
Stainless Steel Inner Tube	mm	Fitted to Outer Diameter	Designed as Required
Aluminum Tube	mm	Fitted to Outer Diameter	Designed as Required
Outer Stainless Steel Tube	mm	6.35±0.20	Designed as Required
Filling Material	-	High-Temperature Compatible Material	-
Cable Weight	Kg/km	145	-

Fiber Performance

Test Item	Multimode Specification (Optional)
Mode Field Diameter (mm)	50±2.5 / 62.5±2.5
Cladding Diameter (mm)	124.8±1.0
Cladding Non-circularity (%)	≤1.0
Core-Cladding Concentricity Error (mm)	≤1.5
Coating Diameter (mm)	245±7
Outer Coating-Cladding Concentricity Error (mm)	≤12.0

Test Item	Specifications
Fiber Type	Multimode (compatible with GI 50/125 or 62.5/125)
Fiber Count	1 fiber; 1-2 fibers
Attenuation (850 nm)	≤3.5 dB/km
Attenuation (1300 nm)	≤1.5 dB/km

Item	Unit	Specifications (by fiber count/outer diameter)
Fiber Count	Fibers	1；1-2
Cable Outer Diameter	mm	3.0；6.35±0.20
Allowable Tensile Strength (Long-term)	N	200；5000
Allowable Tensile Strength (Short-term)	N	400；9000
Allowable Crush Load (Long-term/100 mm)	N	2000；5000
Allowable Crush Load (Short-term/100 mm)	N	3000；10000
Min. Bending Radius (Dynamic)	mm	300；191
Min. Bending Radius (Static)	mm	150；127
Operating Temperature Range	℃	-180~700；-60~150；-180~300
Withstand Pressure	Mpa	≥8；≥60
Cable Net Weight	kg/km	145

Marking Information

Standard marking: manufacturer information + oil well temperature sensing cable + fiber count + outer diameter + operating temperature range + month/year + XXXXm
Custom marking is available per customer requirements.

Cable Drum Length

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