Erosion-Resistant Valve Trim Using Deflector Rings and Nozzles
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Solution Overview
Problem
Valves used in well operations are prone to erosion from fluid flow, leading to high maintenance and repair costs, especially when deployed downhole.
Innovation Solution
A downhole valve assembly with erosion-resistant features, including a nozzle secured without welding and a circumferentially resilient deflector ring that blocks fluid flow through an annulus, using materials like polycrystalline diamond compact and tungsten carbide, and an interference fit to maintain the deflector ring in position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional valve components are used in erosive fluid flow, then the valve can regulate fluid flow, but the components suffer erosion damage leading to high maintenance costs
Solution Approach 1:
The patent applies composite materials by combining a resilient deflector ring material with an erosion-resistant coating material (such as polycrystalline diamond compact or tungsten carbide) to create a flow trim assembly that resists erosive damage while maintaining operational flexibility
Solution Approach 2:
The patent changes the physical parameters of the valve components by selecting specific erosion-resistant materials and coating types, transforming the original vulnerable components into durable erosion-resistant components capable of withstanding high-velocity fluid flow
2Strength
If welding is used to secure nozzle components, then the nozzle can be firmly attached, but the welding process may contribute to erosion or failure
Solution Approach 1:
The patent removes the welding process from the nozzle attachment method, replacing it with a mechanical retention system using a retainer that secures the nozzle to the housing without welding, thereby eliminating welding-related erosion or failure risks
Solution Approach 2:
The patent introduces a retainer as an intermediary component between the nozzle and housing, which mechanically secures the nozzle in place without requiring direct welding between the nozzle and housing, thus avoiding welding-related problems
3Object-affected harmful factors
If the deflector ring is made rigid to block fluid flow effectively, then erosion protection is improved, but the ring cannot accommodate dimensional variations or misalignment
Solution Approach 1:
The patent uses a flexible deflector ring that can elastically deform to accommodate dimensional variations and misalignment between components while maintaining its erosion-blocking function, combining flexibility with erosion resistance through specialized materials and coatings
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 effectively minimizes erosive damage to the valve components, reducing maintenance and repair costs by protecting critical areas from fluid flow erosion.
Implementation Method 1
An interference fit may be formed between the deflector ring and the sleeve.
Implementation Method 2
a circumferentially resilient deflector ring that blocks fluid flow through an annulus
Data Source
AI summary
A valve assembly can include a housing having multiple longitudinally spaced apart ports, a sleeve longitudinally displaceable in the housing, and at least one deflector ring configured to block flow through an annular space formed between the housing and an outer surface of the sleeve. The deflector ring is positioned longitudinally between an adjacent pair of the ports. Another valve assembly can include a housing having a port, a sleeve longitudinally displaceable in the housing, and a nozzle having an orifice in communication with the port. The nozzle is secured to the housing.