Intelligent downhole electro-hydraulic composite monitoring system for well completion

The intelligent well completion electro-hydraulic composite monitoring system, which integrates hydraulic directional valves and monitoring systems, solves the problems of wellbore space limitations and control complexity in existing technologies. It achieves miniaturized, low-cost, and efficient flow control, and improves the reliability and accuracy of downhole production regulation.

CN122190681APending Publication Date: 2026-06-12TIANJIN CHUANGKELAN ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN CHUANGKELAN ENERGY TECHNOLOGY CO LTD
Filing Date
2026-03-17
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing hydraulically controlled intelligent well completion systems are limited by wellbore space, resulting in a limited number of controlled systems. Surface hydraulic operations are complex and costly, and downhole digital hydraulic decoders are prone to errors, leading to production control mistakes and hindering the application and development of intelligent well completion technology in oil and gas fields.

Method used

Design an intelligent well completion downhole electro-hydraulic composite monitoring system that integrates hydraulic directional valves and monitoring systems. It adopts a semi-circular valve body structure and achieves multi-valve control through a single-core steel pipe cable and hydraulic pipeline, reducing pipeline usage and simplifying the surface hydraulic control system. It is equipped with dual temperature and pressure integrated sensors and displacement sensors for real-time monitoring.

Benefits of technology

The system size has been reduced, making it easier to run into the wellbore. This has lowered the difficulty of machining and maintenance costs, improved the efficiency and accuracy of control, reduced the probability of errors in the pressure control sequence, and provided comprehensive data support.

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Abstract

The application belongs to the technical field of downhole intelligent tools, and discloses an intelligent well completion downhole electro-hydraulic composite monitoring system, which comprises a supporting pipe, a downhole electro-hydraulic composite monitoring unit and a pressure communication pipe, the downhole electro-hydraulic composite monitoring unit is fixed on the supporting pipe through five first inner hexagonal screws and five second inner hexagonal screws, a hydraulic reversing assembly, a monitoring assembly and a control assembly are arranged in the valve body of the downhole electro-hydraulic composite monitoring unit, the hydraulic reversing valve and the monitoring system are integrated in the application, and the semicircular valve body structure is used, so that the overall layout is more compact, the volume is significantly reduced, the downhole tool can be lowered into the wellbore annular space in a limited scene, can smoothly pass through a complex downhole path with a small bending angle, most of the parts are selected from standardized components, and complex custom processing is not needed, so that the machining difficulty is greatly reduced.
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