Single Packer With Integrated Sensors For Wellbore Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing straddle packer configurations in wellbores lack sufficient information on downhole parameters and are susceptible to mechanical stresses, limiting expansion ratios and drawdown pressure differentials, making them inefficient for fluid sample collection.
Innovation Solution
A single packer system with an outer flexible skin and integrated sensors to detect specific parameters, allowing for larger expansion ratios, higher drawdown pressure differentials, and improved stress management, while facilitating focused sampling and fluid collection through multiple drains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If straddle packer configuration is used to isolate wellbore regions, then fluid sample collection is enabled, but mechanical stresses limit expansion ratio and drawdown pressure differential
Solution Approach 1:
The packer is divided into multiple independent elements including an outer flexible skin, inner bladder, and multiple drains positioned at different locations. This segmentation allows each element to independently manage stress and expansion, enabling larger overall expansion ratios without exceeding mechanical stress limits of individual components.
Solution Approach 2:
The packer employs an outer flexible skin and inner bladder made of elastomeric materials that can flex and expand to accommodate wellbore irregularities. These flexible shells distribute mechanical stresses across the entire packer structure rather than concentrating them at specific points, thereby increasing the allowable expansion ratio and drawdown pressure differential.
2Loss of information
If straddle packer configuration is used, then fluid collection between two packers is achieved, but sufficient information on downhole parameters is not provided
Solution Approach 1:
The packer is designed to perform multiple functions simultaneously: it isolates wellbore regions, collects fluid samples through multiple drains, and monitors downhole parameters including pressure, temperature, and expansion ratio using integrated sensors. This multi-functionality eliminates the need for separate measurement devices, reducing overall system complexity while providing comprehensive downhole information.
Solution Approach 2:
The packer incorporates sensors that provide real-time feedback on downhole conditions including pressure differentials, temperature, and packer expansion ratio. This feedback enables operators to monitor the isolation effectiveness and fluid collection process, allowing for optimized drawdown operations and immediate detection of any isolation failures or abnormal conditions.
3Reliability
If multiple packers are used for isolation, then wellbore regions can be isolated, but the configuration is susceptible to mechanical stresses
Solution Approach 1:
The invention merges the functions of multiple packers into a single integrated device. By combining multiple drains, sensors, and isolation elements into one packer unit, the system achieves reliable wellbore region isolation while distributing mechanical stresses across a unified structure designed to handle the combined loads, rather than creating stress concentration points between separate packer assemblies.
Data Source
AI summary
A technique involves collecting formation fluids through a single packer having at least one drain located within the single packer. The single packer is designed with an outer flexible skin and one or more drains coupled to the outer flexible skin. The single packer further comprises one or more sensors positioned to detect one or more specific parameters that may be related to well characteristics and/or single packer characteristics.