Downhole Tool Status Verification from Surface Downlink Feedback

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Solution Overview

Problem

Communication between downhole tools and surface equipment in wellbores is limited, slow, and unreliable, making it difficult to accurately determine the operational status of downhole tools due to incomplete, noisy, or unavailable telemetry data.

Innovation Solution

A status detection system that monitors surface parameters and confirms downlink reception by comparing downhole telemetry data to expected behavior, allowing accurate determination of downhole tool status based on confirmed downlink commands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If downhole telemetry techniques are used to communicate status from downhole tools to surface equipment, then information can be transmitted, but the data may be incomplete, noisy, or unreliable

Engineering Contradiction:

Improvetelemetry data completenessVSAvoidtelemetry data reliability

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The system implements feedback by monitoring surface parameters (downlink commands sent to downhole tools) and comparing them with received downhole telemetry data. This feedback loop allows the system to verify whether downlink commands were properly received and executed by downhole tools, compensating for incomplete or noisy telemetry data through cross-validation with surface command records

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system introduces an intermediary verification layer that acts as a mediator between surface equipment and downhole tools. By comparing surface downlink records with downhole telemetry responses, the system creates an intermediate validation mechanism that filters out noise and incompleteness in the direct telemetry communication channel

Inventive Principle:

Principle #24Intermediary (Mediator)

2Length of moving object

If deep wellbore operations are conducted, then exploration and extraction capabilities are enhanced, but communication between downhole tools and surface equipment becomes limited and slow

Engineering Contradiction:

Improvewellbore depthVSAvoidcommunication speed

Core Design Contradiction:

Length of moving objectVSSpeed

Solution Approach 1:

The system performs preliminary action by recording and storing all downlink commands sent to downhole tools at the surface before transmission. These pre-recorded surface parameters serve as reference data that can be later compared with downhole telemetry responses, enabling status determination without requiring real-time communication speed

Inventive Principle:

Principle #10Preliminary action

3Length of moving object

If deep wellbore operations are conducted, then exploration and extraction capabilities are enhanced, but communication reliability between downhole tools and surface equipment deteriorates

Engineering Contradiction:

Improvewellbore depthVSAvoidcommunication reliability

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The system implements feedback by continuously comparing surface downlink records with downhole telemetry data, creating a verification mechanism that compensates for communication reliability issues at depth

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The comparison mechanism acts as an intermediary that validates communication reliability by cross-checking surface commands with downhole responses, filtering out unreliable telemetry data through verification against the surface downlink record

Inventive Principle:

Principle #24Intermediary (Mediator)

4Measurement precision

If downhole tool status is determined based on downhole telemetry data, then direct status information can be obtained, but the status determination may be inaccurate due to data quality issues

Engineering Contradiction:

Improvestatus determination accuracyVSAvoidtelemetry data quality

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The system uses feedback by comparing the downhole tool status indicated by telemetry data with the expected status based on surface downlink commands. This feedback comparison enables accurate status determination even when telemetry data is incomplete or noisy, as the surface downlink record provides a reference for verification

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12560073B2Systems and methods for determining downhole tool status

Publication Date: 2026.02.24 SCHLUMBERGER TECH CORP

AI summary

A system and method of monitoring a downhole tool implemented in a wellbore that include identifying, from surface parameters, a surface downlink sent from a surface of the wellbore to the downhole tool. The surface downlink indicates a downlink command for the downhole tool to implement. The system and method further include confirming that the downhole tool received the surface downlink based on comparing downhole telemetry data received from the downhole tool to the surface downlink. The system and method additionally include, determining a status of the downhole tool indicated by the surface downlink based on confirming that the downhole tool received the surface downlink.