Remotely Operated Three Position Spool Valve for Downhole Flow Control
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Solution Overview
Problem
Traditional systems and methods for regulating fluid flow rates in and out of production tubing during well completion and production operations are labor-intensive, time-consuming, and rely on complex equipment or installations.
Innovation Solution
The implementation of remotely-operable spool valve assemblies that utilize multi-position spool valve-based flow regulation, eliminating the need for wash pipes, packers, and other sealing methods, allowing for variable flow rates by blocking or unblocking exit ports using pneumatic and hydrostatic pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional flow rate regulation systems are used, then flow control can be achieved, but the systems are labor-intensive and time-consuming
Solution Approach 1:
The patent replaces traditional mechanical flow control systems with a remotely operated spool valve assembly that can be controlled from the surface. The spool valve mechanism uses hydraulic or pneumatic actuation instead of manual mechanical adjustment, eliminating the need for labor-intensive downhole operations and reducing the time required to regulate flow rates.
Solution Approach 2:
The patent introduces a remotely operated spool valve assembly as an intermediary device between the production tubing and the control system. This intermediary component allows flow rate regulation to be performed remotely from the surface rather than requiring direct manual intervention downhole, thereby improving productivity and reducing time loss.
2Ease of operation
If traditional flow rate regulation equipment is used, then flow control is possible, but the equipment and installation are complicated
Solution Approach 1:
The patent extracts the complex sealing and flow control functions from multiple separate traditional components (wash pipes, packers, sealing assemblies) and consolidates them into a single integrated spool valve assembly. This extraction and consolidation simplifies the overall equipment complexity while maintaining ease of operation, as the unified design requires fewer installation steps and less complex coordination between components.
Solution Approach 2:
The patent merges multiple functions (flow control, sealing, and positioning) into a single spool valve assembly. By combining these functions that were previously handled by separate complex equipment into one integrated unit, the overall device complexity is reduced while the ease of operation is improved, as operators deal with a single unified system rather than multiple interconnected components.
3Device complexity
If multi-position spool valve-based flow regulation is used, then operational complexity is reduced, but precise control of flow rates is required
Solution Approach 1:
The patent segments the continuous flow control range into multiple discrete positions of the spool valve. Each position corresponds to a specific flow rate setting, which simplifies the control mechanism while still providing precise flow rate regulation. The segmented approach allows operators to select from predetermined flow rates without requiring complex continuous adjustment mechanisms, thereby reducing device complexity while maintaining measurement precision.
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 solution enables efficient and precise control of fluid flow rates into or out of production tubing, reducing operational complexity and time, while allowing for seamless integration with existing well completion and production systems.
Implementation Method 1
allowing for variable flow rates by blocking or unblocking exit ports using pneumatic and hydrostatic pressure
Implementation Method 2
allowing for variable flow rates by blocking or unblocking exit ports using pneumatic and hydrostatic pressure
Data Source
AI summary
A spool valve assembly and methods for use downhole to control fluid flow into a borehole from a downhole formation. The assembly includes a valve body having an interior. The assembly also includes a spool moveable within the valve body interior from a first position wherein the spool prevents flow through the valve body, to a second position wherein the spool allows flow through the valve body at a first flow rate, and to a third position wherein the spool allows flow through the valve body at a second flow rate different than the first flow rate. The spool is moveable from the first position to the second position using hydrostatic fluid pressure acting on the spool from outside the valve body. The spool is moveable from the second position to the third position using gas pressure from a chemical reaction producing a force sufficient to overcome the hydrostatic pressure.