Multi-probe Reservoir Sampling Device with Independent Radial Actuators
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Solution Overview
Problem
Current methods for sampling fluids from subsurface earth formations are limited in their ability to independently operate multiple sampling probes at the same depth, which restricts comprehensive fluid analysis and pressure sensing across the wellbore circumference.
Innovation Solution
A downhole tool with independently operable sample probe assemblies, each equipped with linkage and actuator systems that can move radially to engage the wellbore wall, allowing for simultaneous fluid sampling and pressure sensing at discrete locations along the wellbore circumference, with optional sample tanks for fluid storage and pressure sensors for real-time data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sampling probes are used to sample formation fluids at different locations, then comprehensive fluid analysis and pressure sensing capability is improved, but device complexity increases due to multiple independent actuator systems
Solution Approach 1:
The device is divided into multiple independent sample probe assemblies, each with its own actuator system. Each assembly can be independently controlled to engage with the wellbore wall at different circumferential locations, enabling comprehensive sampling while maintaining operational independence. This segmentation allows the system to achieve versatile sampling capability without requiring a single complex monolithic structure.
Solution Approach 2:
Each sample probe assembly is designed with multi-functionality, capable of both fluid sampling and pressure sensing operations. The assemblies can be selectively deployed to different locations around the wellbore circumference, making the device universally applicable for comprehensive formation evaluation at multiple discrete locations simultaneously.
2Measurement precision
If multiple independent sample probe assemblies are deployed at the same depth, then sampling precision at multiple locations is improved, but device complexity increases due to multiple actuator systems
Solution Approach 1:
The device employs multiple segmented probe assemblies positioned at different circumferential locations but the same axial depth. Each assembly independently engages the wellbore wall to provide precise sampling at its specific location. This segmentation enables high measurement precision across multiple locations while keeping each individual assembly relatively simple in design.
Solution Approach 2:
The multiple probe assemblies are arranged in the circumferential dimension rather than the axial dimension. All assemblies operate at the same depth (axial position) but are distributed around the wellbore circumference, enabling precise sampling at multiple discrete locations simultaneously without increasing axial device length or complexity.
3Measurement precision
If pad assemblies are projected radially outward to engage the wellbore wall, then sampling capability at discrete circumferential locations is improved, but device complexity increases due to linkage and actuator mechanisms
Solution Approach 1:
The device uses multiple segmented pad assemblies, each mounted on its own linkage mechanism with an independent actuator. Each pad assembly can be independently projected radially outward to engage the wellbore wall at a specific circumferential location, enabling precise pressure sensing and sampling at discrete locations while maintaining simple individual assembly designs.
Solution Approach 2:
The pad assemblies are designed with dynamic capability through linkage mechanisms that allow radial projection outward from the device body. Each pad assembly can transition between retracted and engaged positions independently, enabling precise positioning at the wellbore wall while maintaining operational flexibility and reducing the complexity of fixed positioning systems.
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
Enables precise and independent sampling of formation fluids at multiple locations within the wellbore, allowing for comprehensive fluid analysis and pressure data collection, improving the accuracy of subsurface formation evaluation.
Implementation Method 1
the actuator is a hydraulic source in selective pressure communication with an end of the piston, so that when the hydraulic source provides pressurized fluid to an end of the piston, the arm is selectively moved radially with respect to the body
Implementation Method 2
the actuator is a screw having an end coupled to a motor, and having a portion that threadingly engages the arm, so that when the screw is rotated by the motor, the arm is moved radially with respect to the body
Implementation Method 3
the connate fluid is typically siphoned into the sonde with a pumping means disposed therein
Data Source
AI summary
A tool insertable into a wellbore for sampling formation fluids includes a body, and sample probe assemblies that project radially outward from the body and into sampling contact with the wellbore wall. Packers are provided on the outer terminal ends of the sample probe assemblies and which are urged against the wellbore wall. Actuator driven linkage assemblies selectively deploy and retract the packers from and back into the body. The sample probe assemblies are disposed at substantially the same axial location on the body, and are angularly spaced about an axis of the body. Each sample probe assembly is independently actuated, so that a discrete azimuthal portion can be sampled, and each has a dedicated sample container for storing sampled formation fluid.