Modular Directional Control Valve for Downhole Pressure Delivery
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Solution Overview
Problem
Existing directional control valves for downhole tools are complex to assemble and bulky, making them unsuitable for fitting within oilfield tubulars, and they do not efficiently provide accurate pressure for downhole applications.
Innovation Solution
A modular directional control valve design featuring a base and slider with specific stingers, receptacles, and seal assemblies, including a sliding seal assembly and operating rod, which allows for easy assembly and reduced size while maintaining efficient pressure delivery through a system of stingers, receptacles, and seal plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a conventional directional control valve is designed to provide sufficient pressure for downhole applications, then the pressure delivery capability is improved, but the device becomes bulky and complex to assemble
Solution Approach 1:
The valve is divided into modular components including a body, slider, seal assembly, and external actuator that can be assembled separately and connected through standardized interfaces. This segmentation reduces assembly complexity while maintaining pressure delivery capability through proper sealing interfaces between modules.
Solution Approach 2:
The valve design utilizes a longitudinal bore and transverse bore configuration with a slider that moves along the longitudinal axis, creating a compact three-dimensional arrangement that delivers sufficient pressure while minimizing overall device footprint and assembly complexity.
2Stress or pressure
If a conventional directional control valve is designed to provide sufficient pressure for downhole applications, then the pressure delivery capability is improved, but the device size increases making it unsuitable for fitting within oilfield tubulars
Solution Approach 1:
By segmenting the valve into compact modular components that fit together efficiently, the overall volume is reduced while maintaining the pressure delivery capability through optimized sealing surfaces and fluid pathways in each module.
Solution Approach 2:
The valve employs a compact three-dimensional arrangement with longitudinal and transverse bores intersecting to create efficient fluid pathways in a minimized volume, allowing sufficient pressure delivery while fitting within constrained downhole tubular spaces.
3Measurement precision
If a conventional directional control valve is designed with complex internal mechanisms to ensure accurate pressure delivery, then the pressure control precision is improved, but the assembly becomes complex and error-prone
Solution Approach 1:
The valve separates pressure control functions into distinct modular components with dedicated sealing surfaces and fluid pathways, reducing assembly complexity while maintaining pressure control accuracy through precise mating interfaces between modules.
Solution Approach 2:
The modular components are pre-assembled and pre-sealed as complete functional units before final installation, reducing on-site assembly complexity and potential for errors while maintaining the pressure control accuracy required for downhole applications.
Data Source
AI summary
A directional control valve includes: a base and a slider longitudinally movable relative to the base. The base includes: a rectangular body having a longitudinal bore, a transverse bore, and a chamber formed at an intersection between the bores; supply and function seal plates, each having a stinger disposed in the transverse bore, one or more receptacles, and a passage extending from each receptacle through the stinger; and a supply, first function, and second function blocks, each fastened to the body and having a stinger disposed in the respective receptacle and a coupling for connection to a flow line. The slider includes: a sliding seal assembly disposed in the chamber; and an operating rod fastened to the seal assembly.