2-core and 4-core Teflon oil well high-temperature optical cables and high-temperature resistant

detection sensor temperature-measuring optical fibers for oil well sensing

Structure and Materials

• Optical Fiber: Usually made of polyimide high-temperature optical fiber, which has excellent high-temperature resistance and optical properties, enabling stable transmission of optical signals in high-temperature environments.
• Cladding Layer: Typically coated with a layer of polytetrafluoroethylene (Teflon). Teflon features outstanding high-temperature resistance, corrosion resistance, water resistance, and electrical insulation, protecting the optical fiber from harsh external environments.
• Reinforcement Layer: Kevlar and other materials are used as the reinforcement layer in the middle, which enhances the mechanical strength of the optical cable, improving its resistance to tension, extrusion, and bending, and ensuring it is not easily damaged in the complex downhole environment of oil wells.
• Outer Sheath: The outer sheath also uses polytetrafluoroethylene to provide further protection, making the overall optical cable flexible and corrosion-resistant for convenient construction and laying.

Other Main Parameters FYI:

Working Principle

Performance Characteristics

• High-temperature Resistance: It can withstand temperatures below 200°C or even 300°C, meeting the high-temperature requirements of the downhole environment in oil wells.
• Corrosion Resistance: Materials such as Teflon have good corrosion resistance, capable of withstanding the erosion of various chemical substances in oil wells, such as sulfides.
• Anti-interference: The optical fiber itself is immune to electromagnetic interference, enabling stable operation in the strong electromagnetic environment of oil wells and ensuring the accuracy and reliability of measurement data.
• High-precision Measurement: It can achieve high-precision temperature measurement with an accuracy of up to ±0.5°C or even higher, capable of promptly capturing subtle temperature changes in the downhole of oil wells, providing accurate data support for oil well production.
• Long-distance Monitoring: The maximum monitoring distance per channel can reach 16 kilometers or longer, suitable for large-scale oil well monitoring, and enabling comprehensive temperature monitoring of different depths in oil wells.

Application Scenarios

• Oil Well Temperature Monitoring: Real-time monitoring of temperature changes at different depths in oil wells helps petroleum engineers understand the production status of oil wells, such as judging the temperature distribution of oil layers and changes in oil-gas-water interfaces, so as to adjust production strategies in a timely manner and improve oil recovery efficiency.
• Oil Well Fault Diagnosis: Abnormal temperatures are monitored to detect potential faults in oil wells, such as tubing leakage and casing damage, and timely measures are taken for repair to avoid the occurrence and expansion of accidents.
• Reservoir Dynamic Monitoring: Long-term monitoring of temperature changes in reservoirs, analysis of the dynamic characteristics of reservoirs, providing important basis for reservoir development and management, and optimizing reservoir exploitation plans.

Selection and Installation

• Selection: According to the specific environmental conditions of the oil well (such as temperature, pressure, corrosion, etc.), monitoring requirements (accuracy, distance, etc.), and budget, select the appropriate core number (2-core or 4-core), specifications, and performance of the oil well sensing optical cable.
• Installation: The installation process requires professional technology and equipment to ensure the correct laying and fixing of the optical cable downhole, avoiding excessive tension, bending, or extrusion of the optical cable. At the same time, pay attention to the connection between the optical cable and wellhead equipment, monitoring systems, etc., to ensure stable signal transmission.

GYTA53 12/32 core fiber optic cable , 250um, are positioned in a loose tube made of a high modulus plastic.

The tubes are filled with a water-resistant filling compound.