Polycrystalline Diamond Sampling Valve for Erosion Resistance
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Solution Overview
Problem
Sampling relief valves in hydrocarbon systems frequently experience erosion and premature failure due to frequent actuation and the presence of sediments in crude oil, leading to potential overfilling and safety issues.
Innovation Solution
The implementation of a relief valve with a carbide substrate, potentially fused with diamond particles, between the valve stem and seat, which enhances durability and resistance to erosion, allowing for frequent operation without compromising the valve's integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the sampling relief valve is made from stainless steel, then the valve can be manufactured with standard materials and processes, but the valve experiences significant erosion and wear leading to premature failure
Solution Approach 1:
The valve incorporates a polycrystalline diamond coating applied to stainless steel engagement components. This composite structure combines the manufacturability and base strength of stainless steel with the extreme wear and erosion resistance of polycrystalline diamond, resolving the contradiction between ease of manufacture and valve durability.
2Productivity
If the sampling relief valve operates frequently to maintain back pressure and provide samples, then the system maintains proper pressure and sampling capability, but the valve is subject to significant erosion and wear
Solution Approach 1:
The polycrystalline diamond coating on the engagement components enables the valve to withstand frequent actuation cycles (hundreds to thousands per day) by providing extreme hardness and erosion resistance, thereby maintaining both high productivity through frequent operation and extended reliability.
Solution Approach 2:
The invention changes the material parameter of the engagement components from standard stainless steel to polycrystalline diamond-coated stainless steel, fundamentally altering the wear and erosion characteristics to support frequent operation without compromising lifespan.
3Reliability
If sediment is present in the crude oil, then the fluid reflects real production conditions, but the sediment compounds the degradation of the valve
Solution Approach 1:
The polycrystalline diamond coating provides a hard, inert surface that resists erosion from sediment particles in the crude oil, allowing the valve to maintain sampling accuracy while withstanding the harmful effects of sediment-induced wear and degradation.
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 significantly extends the lifespan of the sampling relief valve, reduces the risk of leakage and overfilling, and maintains operational reliability even under conditions of frequent actuation and sediment-laden fluids.
Implementation Method 1
the carbide substrate is fused with diamond particles to form polycrystalline diamond (PCD)
Data Source
AI summary
A relief valve in a hydrocarbon site is shown. The relief valve is disposed within a housing. The housing includes a first engagement component coupled with a valve spring and a second engagement component axially aligned with the first engagement component. The second engagement component is configured to engage with the first engagement component during an operation cycle to translate the stem along the axis in response to the pressure within the relief valve being above the predetermined threshold. In some embodiments, the second engagement component is formed at least in part of a carbide substrate.