Replaceable Wear Inserts for Abrasive Pulsation Dampener Inlets
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Solution Overview
Problem
Pulsation dampeners in fluid transfer systems face challenges in wear resistance and failure in harsh environments like fracking due to abrasive particulates, leading to performance degradation and increased maintenance costs.
Innovation Solution
Incorporating replaceable wear inserts made of materials resistant to abrasive wear, such as tungsten carbide, at the inlet and outlet of pulsation dampeners, which are designed for either loose or tight fits and feature internal passages or off-center flow paths to prevent particulate accumulation, along with external pressure orifice devices to enhance pressure pulsation dampening and reduce wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wear inserts are made from abrasive-resistant materials like tungsten carbide, then wear resistance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The wear insert is divided into a body portion and a separate flange portion that can be manufactured independently and then assembled together. This segmentation allows the complex tungsten carbide body to be produced using specialized processes while the flange can be made from simpler materials using conventional machining, thereby reducing overall manufacturing complexity while maintaining wear resistance where needed.
Solution Approach 2:
The wear insert employs composite construction by combining tungsten carbide (for abrasive resistance) with steel or other materials for the flange portion. This composite approach allows each material to be used where it provides the most benefit, optimizing both wear resistance and manufacturability without requiring the entire component to be made from difficult-to-process materials.
2Reliability
If wear inserts are designed with tight fit to prevent particulate accumulation, then sealing is improved, but removability and ease of replacement deteriorate
Solution Approach 1:
The fit between the wear insert and housing is designed to be dynamic rather than static - featuring a tight fit in the radial direction for sealing while maintaining a loose fit axially to facilitate removal. This dynamic fit design allows the same interface to provide both sealing integrity during operation and ease of replacement during maintenance, resolving the contradiction between these two requirements.
Solution Approach 2:
By separating the wear insert into a removable component with a flange, the design enables different fit characteristics at different interfaces - tight radial fit for sealing and loose axial fit for removal - thereby simultaneously achieving both sealing integrity and ease of repair without compromise.
3Reliability
If wear inserts include integrated pressure orifice devices, then pulsation dampening performance is improved, but device complexity increases
Solution Approach 1:
The pressure orifice device is merged with the wear insert by integrating the orifice directly into the wear insert body. This combination eliminates the need for separate orifice components and their associated mounting hardware, thereby improving pulsation dampening performance while actually reducing overall device complexity through functional integration.
4Ease of repair
If wear inserts are made replaceable, then maintenance cost is reduced, but initial device complexity and manufacturing cost increase
Solution Approach 1:
The wear insert is segmented into a removable component with a flange that interfaces with the housing, enabling easy replacement without replacing the entire pulsation dampener assembly. This segmentation adds moderate initial complexity but dramatically improves maintainability by allowing quick swap-out of worn inserts, reducing long-term maintenance costs and downtime.
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 operational life of pulsation dampeners by reducing wear and pressure leaks, maintaining sealing integrity, and facilitating easy replacement of wear inserts, thus improving performance and reliability in harsh environments.
Implementation Method 1
Replaceable wear inserts of a material resisting abrasive wear due to particulates within pumped fluid
Implementation Method 2
The wear inserts may have internal passages or be mounted to create turbulent flow through the pulsation dampener to mitigate the risk of dead spots accumulating particulates
Implementation Method 3
Grooves may be provided with O rings to seal against pressure leaks
Data Source
AI summary
Replaceable wear inserts of a material resisting abrasive wear due to particulates within pumped fluid are used for the inlet and/or outlet of a pulsation dampener coupled to the outlet of a land-base or mobile-mounted pump. The wear inserts may be integrated with pressure orifice devices contributing to pressure pulsation dampening. The wear inserts may have internal passages or be mounted to create turbulent flow through the pulsation dampener to mitigate the risk of dead spots accumulating particulates. The wear inserts may be sized for either “loose” or “tight” fit within the inlet and outlet to facilitate removability despite the potential for particulates embedding within the gap. Grooves may be provided with O rings to seal against pressure leaks.