Industrial Cable Manufacturer

Structure


Aluminum tube
Filler
Optical fiber: high temperature optical fiber
Stainless steel tube
Outer stainless steel tube

Description of oil well temperature measuring optical fiber cable

Oil well temperature measuring optical fiber cables are primarily used to measure temperature and pressure levels under an oil well. This optical cable is protected by three layers of metal tubes to endure the high temperature, high pressure, and highly corrosive environment under the well, thus allowing the cable to satisfy underground operation requirements.

Application
Measuring the temperature and pressure under the high temperature oil well.
Measuring the temperature and pressure under the high temperature gas well.
High temperature furnace and other high-temperature service.
Parameter Technical parameter

Item	Content	Typical value
	Quantity of optical fiber	1~4
Filler	Material	High temperature resistant fiber/ high temperature resistant gel
Protecting tube 1	Material	Seamless steel pipe
	Diameter/mm	1.5~3
Protecting tube 2	Material	Aluminum tube /seamless steel pipe
	Outer diameter/mm	2~4
Protecting tube 3	Material	Seamless steel pipe
Outer diameter	mm	4~8
Weight	Kg/km	40~150
Maximum breaking load	KN	150
Anti-pressure ability	N/100mm	2200
Operating temperature	℃	-60~350
* We can design the optical cable according to customer requirements.

Characteristic of optical fiber

		HT 9/125-14/250	HT 9/125-14/155	OHT 9/125-14/250
Mode field diameter	1310nm(μm)	9.2±0.4	9.2±0.4	9.2±0.4
	1550nm(μm)	10.4±0.8	10.4±0.8	10.4±0.8
Attenuation	@1310nm	≤0.40dB/km	≤0.8dB/km	≤1.0dB/km
	@1550nm	≤0.25dB/km	≤0.6dB/km	≤0.8dB/km
Fiber cutoff wavelength	nm	1180~1330	1180~1330	1180~1330
Cladding diameter	μm	125.0±1.0	125.0±2.0	125.0±2.0
Coating diameter	μm	245.0±1.0	155.0±5.0	155.0±5.0
Operating temperature	℃	-65~+150, Short term 200	-65~+200, Short term 250	-65~+300, Short term 350
Coating material		Special polyester	Polyamide	Polyamide

Main machinery and environment performance

Item	Inspection standard	Rated value	Requirements
Pressure	IEC 60794-4	According to technical parameter	According to technical parameter
Seepagetest		Length: 0.5m, 20±5℃, height of water: 1m, 1h	No seepage
dripping test		Length: 0.3m, 70±1℃, 24h	No composition discharge or drip out.

Characteristic and application
Large operating temperature range: -60℃～350℃. This product can be used for long periods of time, even under temperatures as high as 300℃. The optical cable has outstanding mechanical properties, making it suitable for use under wells. The optical cable is totally-enclosed and can withstand a pressure of more than 60MPa.