Multi-Packer Borehole Pressure Zoning for Faster Downhole Communication

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional directional drilling systems face challenges in reducing communication time with the surface, which affects the uptime of the drilling system due to lengthy pulse communications.

Innovation Solution

A downhole system with a series of expandable packers is used to create multiple packer seals along a borehole, allowing for differential fluid pressures across isolated zones, enabling higher fluid pressures in an interior zone than conventional systems, thereby enhancing communication efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional directional drilling systems use lengthy pulse communications to transmit status information and receive instructions from the surface, then communication reliability is maintained, but communication time increases and system uptime decreases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidcommunication time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system segments the borehole into multiple isolated zones using expandable packers, allowing independent pressurization of each zone. This enables parallel communication operations across multiple zones simultaneously, reducing total communication time while maintaining reliable pressure-based signaling in each segmented zone

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses hydraulic pressure differentials across packer seals as the communication medium, replacing electrical pulse communications. Pressure changes can be transmitted faster and more reliably through the hydraulic fluid in each zone, reducing communication time while maintaining signal integrity

Inventive Principle:

Principle #29Pneumatics and hydraulics

2Productivity

If conventional systems apply fluid pressure to the borehole wall for hydraulic fracturing and integrity testing, then basic testing capability is provided, but communication efficiency and precision remain limited

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidpressure differential precision

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

By dividing the borehole into multiple isolated zones with individual packer seals, the system can apply different pressure differentials to each zone. This segmentation enables precise measurement of pressure responses in each zone independently, improving measurement precision while allowing parallel operations that enhance communication efficiency

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system applies localized pressure differentials across specific packer seals rather than uniform pressure throughout. Each zone can have tailored pressure conditions optimized for its specific communication or testing needs, improving both precision of measurement and efficiency of information transmission

Inventive Principle:

Principle #3Local quality

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

The system allows for increased fluid pressure application to the borehole wall, facilitating faster and more effective hydraulic fracturing and integrity testing, while maintaining seal integrity under pressure differentials.

Implementation Method 1

expanding a first packer against a borehole wall; expanding a second packer against the borehole wall; expanding a third packer against the borehole wall; expanding a fourth packer against the borehole wall

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

pressurizing an interior zone longitudinally between the second packer and the third packer to a first pressure relative to a hydrostatic borehole pressure that is greater than a second pressure of at least one exterior zone

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Data Source

PatentUS20250369306A1Systems and methods for surface supervision of a downhole tool

Publication Date: 2025.12.04 SCHLUMBERGER TECH CORP

AI summary

A device may expand a first packer against a borehole wall. A device may expand a second packer against the borehole wall. A device may expand a third packer against the borehole wall. A device may expand a fourth packer against the borehole wall. A device may pressurize an interior zone longitudinally between the second packer and the third packer to a first pressure relative to a hydrostatic borehole pressure that is greater than a second pressure of at least one exterior zone, wherein a first exterior zone is longitudinally between the first packer and the second packer and a second exterior zone is longitudinally between the third packer and fourth packer.