Downhole Wireless Telemetry With Mechanical Pressure Thresholding

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Solution Overview

Problem

Existing downhole telemetry systems face challenges in providing a simple, low-power, and cost-effective solution for wireless data transmission to downhole devices, as wired completions are complex and costly, while acoustic telemetry requires continuous power supply, which is difficult to maintain for 20-30 years of well operation.

Innovation Solution

A mechanical pressure switch is used to detect pressure changes in a tubular, actuating downhole electronics without continuous power, allowing wireless transmission of digital commands using pressure pulses to activate or deactivate downhole tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wired completion is used to provide power and telemetry to downhole devices, then reliability of data transmission is improved, but device complexity and cost increase

Engineering Contradiction:

Improvedata transmission reliabilityVSAvoidwell completion complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical wired completion system with a wireless acoustic telemetry system. Instead of using physical wires to transmit data and power from the surface to downhole devices, the system uses acoustic signals transmitted through the wellbore environment. This substitution eliminates the complexity of wire routing and connection while maintaining the ability to communicate with downhole tools.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary medium (acoustic waves in the wellbore environment) to transfer information between the surface and downhole devices. The acoustic signals serve as a mediator that carries both command signals and telemetry data without requiring direct physical connections, thereby reducing system complexity while maintaining communication reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If acoustic telemetry is used for wireless communication, then device complexity is reduced, but energy consumption increases due to continuous power supply requirements

Engineering Contradiction:

Improvewell completion complexityVSAvoiddownhole battery power consumption

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by using intermittent acoustic pressure pulses to activate downhole tools and sensors only when needed, rather than maintaining continuous power supply. The system applies pressure pulses at specific intervals to trigger tool activation, and the downhole electronics remain in a low-power or inactive state between pulses, significantly reducing overall energy consumption while maintaining operational capability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent enables downhole tools to be activated by the natural wellbore pressure environment itself without requiring external power delivery systems. The acoustic pressure pulses from wellbore operations (such as fracturing or stimulation) directly serve dual purposes: they both activate the tools and provide the energy needed for operation, eliminating the need for separate power supply infrastructure.

Inventive Principle:

Principle #25Self-service

3Reliability

If continuous power supply is provided to downhole transducers, then telemetry operation reliability is improved, but loss of energy increases over extended well life

Engineering Contradiction:

Improvetelemetry operation reliabilityVSAvoidbattery life over 20-30 years

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent uses periodic acoustic pressure pulses to intermittently activate telemetry and tool functions rather than maintaining continuous power consumption. The downhole electronics and tools are activated only during pressure pulse events, remaining in low-power modes between events, thereby extending battery life over the 20-30 year well life while maintaining operational reliability when needed.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent changes the operational parameters of downhole devices from continuous operation to event-driven operation. By transitioning from constant power consumption to intermittent activation based on pressure pulse detection, the system extends battery life while maintaining the ability to perform telemetry and tool activation functions at appropriate wellbore conditions.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method minimizes power consumption, extends battery life, and enables reliable communication over extended periods, facilitating operations like hydraulic fracturing and well management without the need for constant power at the downhole devices.

Implementation Method 1

A mechanical pressure switch is used to detect pressure changes in a tubular, actuating downhole electronics without continuous power

Methodology Applied

Scientific EffectPressure detection:

Data Source

PatentUS12435627B2Wireless telemetry using a pressure switch and mechanical thresholding of the signal

Publication Date: 2025.10.07 HALLIBURTON ENERGY SERVICES INC

AI summary

Systems and methods for wireless downhole telemetry are provided. The system includes a tubular located in a wellbore; a pressure controller located at or near a surface of the wellbore to send a digital command via a change in a pressure applied to the tubular; and a receiver disposed in the wellbore, wherein the receiver includes a mechanical pressure switch to detect the change in the pressure applied to the tubular.