PDHMS Gauge Current Correction for Autonomous Data Revival
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Solution Overview
Problem
Permanent downhole measuring systems (PDHMS) in oil and gas production operations often malfunction due to harsh well conditions, making repair or replacement difficult and expensive, and data transmission is frequently suspended for prolonged periods.
Innovation Solution
A PDHMS system with a field control unit that includes a current source to supply current to gauges and apply a correction regime by incrementally increasing or decreasing current when data cessation occurs, allowing in-situ diagnosis and repair without expert intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If expert technicians are enlisted to conduct repair or replacement of PDHMS instruments, then the reliability of the measuring system is improved, but the loss of time and productivity deteriorate due to prolonged data transmission suspension
Solution Approach 1:
The PDHMS instrument performs self-diagnosis and self-repair by monitoring its own operational parameters and automatically adjusting them when malfunctions are detected, eliminating the need for external expert intervention and reducing downtime
Solution Approach 2:
The system continuously monitors its own operational status and uses this feedback to automatically initiate corrective actions when deviations from normal operation are detected, enabling rapid response to malfunctions without waiting for external technicians
2Measurement precision
If PDHMS instruments are deployed deep within wells to provide well data, then the measurement capability is improved, but the ease of repair deteriorates due to remoteness and harsh conditions
Solution Approach 1:
The instrument is equipped with self-diagnostic and self-repair capabilities that allow it to maintain itself autonomously in the harsh downhole environment, eliminating the need for physical access by technicians for routine maintenance and repairs
Solution Approach 2:
The system proactively monitors its own health parameters and performs preventive adjustments before complete failures occur, reducing the need for actual repair interventions in the difficult-to-access downhole environment
3Productivity
If the current to the gauge is increased to restore data transmission, then the productivity is improved, but the reliability deteriorates due to potential damage from excessive current
Solution Approach 1:
The system dynamically adjusts the current to the gauge in real-time based on monitoring feedback, automatically increasing current when data transmission fails and decreasing it when transmission is restored, optimizing both productivity and reliability
Solution Approach 2:
The system uses feedback from data transmission status to automatically control current levels, ensuring current is only increased when necessary and is immediately reduced when transmission is restored, preventing excessive current exposure
Data Source
AI summary
In certain embodiments, permanent downhole measuring system (PDHMS) includes a sensor having one or more gauges each operable to provide measurement data indicative of a physical parameter, and a field control unit operable to receive the measurement data from the one or more gauges. The field control unit includes a current source configured to provide current to at least one gauge of the sensor and to apply a correction regime that changes the amount of current provided to the at least one gauge upon unplanned cessation of the receipt of the measurement data from the at least one gauge.