Variable Orifice Nozzle Assembly for Injection Valve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing injection valves in oil and gas fields face challenges with pressure drop and flapper valve chatter due to fixed nozzle diameters, which affect the flow rate and reliability of injection processes.
Innovation Solution
A tubing retrievable injection valve with a variable orifice nozzle assembly that allows for adjustable nozzle diameters, enabling an infinitely variable downhole nozzle to maintain the flapper valve fully open and minimize pressure drop across a range of injection flow rates, preventing flapper valve chatter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed diameter nozzle is used in the injection valve, then the device structure is simple, but the pressure drop increases and flapper valve chatter occurs when flow rate varies
Solution Approach 1:
The nozzle assembly is designed with movable components that allow the nozzle to shift position in response to varying flow rates. This dynamic adjustment enables the nozzle to maintain optimal alignment with the flapper valve opening, preventing chatter and ensuring stable operation across different injection conditions without requiring a completely complex adjustable mechanism.
Solution Approach 2:
The invention changes the effective parameters of the nozzle system by allowing positional adjustment rather than fixing the diameter. The nozzle can move axially to change its effective flow area and alignment with the flapper valve, providing adaptability to different flow rates while maintaining a relatively simple overall structure compared to fully adjustable systems.
2Loss of energy
If a variable orifice nozzle assembly is implemented, then pressure drop is minimized across varying flow rates, but the device complexity increases
Solution Approach 1:
The variable orifice nozzle utilizes dynamic movement of the nozzle body or internal components in response to flow rate changes. This allows the effective orifice area to vary automatically with flow conditions, minimizing pressure drop across a range of injection rates without requiring external control systems or complex adjustment mechanisms.
Solution Approach 2:
The nozzle assembly is designed to automatically adjust its effective orifice area in response to flow rate variations without external intervention. The system self-regulates to minimize pressure drop by allowing the nozzle to shift position or change configuration based on the prevailing flow conditions, eliminating the need for complex external control systems.
3Adaptability or versatility
If the nozzle diameter is fixed, then the manufacturing is simpler, but the adaptability to different injection flow rates is reduced
Solution Approach 1:
The nozzle assembly incorporates dynamic adjustment capability that allows the same manufactured component to adapt to different flow rates through positional changes. This approach provides versatility across a range of injection conditions while maintaining relatively simple manufacturing processes, as the base nozzle geometry can be standardized with added mobility features.
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 solution ensures stable and efficient injection by maintaining the flapper valve fully open across varying flow rates, reducing pressure drop and eliminating flapper valve chatter, thereby enhancing the reliability and performance of the injection process.
Implementation Method 1
The nozzle is designed to generate a pressure drop sufficient to hold the flapper valve fully open
Data Source
AI summary
A method and apparatus for controlling the flow of fluid in an injection well includes a main valve assembly having a valve and a retrievable nozzle selective lock assembly (RNSLA). The RNSLA is operable when positioned within the valve body to open the valve when fluid is pumped into the well and closes the valve when fluid flow is terminated. The RNSLA includes a replaceable orifice nozzle so that orifices of different dimensions may be used in conjunction with the valve assembly. In an alternate embodiment, the RNSLA includes a variable output nozzle assembly to maintain the valve in a protected open position without chattering over a wide range of flow rates.