Intelligent well completion underground electro-hydraulic composite monitoring system

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

Application Number
CN202610322106.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
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 invention belongs to the technical field of underground intelligent tools, and discloses an intelligent well completion underground electro-hydraulic composite monitoring system which comprises a supporting pipe, an underground electro-hydraulic composite monitoring unit and a pressure communicating pipe. The underground electro-hydraulic composite monitoring unit is fixed to the supporting pipe through five first inner hexagon screws and five second inner hexagon screws; a hydraulic reversing assembly, a monitoring assembly and a control assembly are arranged in a valve body of the underground electro-hydraulic composite monitoring unit, a hydraulic reversing valve and a monitoring system are integrated, and a semicircular valve body structure is matched, so that the overall layout is more compact, the size is remarkably reduced, tripping in is facilitated in the scene that the annular space of a shaft is limited, and the safety performance of the underground electro-hydraulic composite monitoring system is improved. And in addition, complex underground paths such as small bending angles can be smoothly passed, most of the parts adopt standardized part type selection, complex customized machining is not needed, and the machining difficulty is greatly reduced.
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