Externally Replaceable Valve Sleeve for Erosion Protection
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Solution Overview
Problem
Valve assemblies used in well site operations, such as hydraulic fracturing, face issues with abrasive fluids causing erosion of valve components like valve sleeves and bodies, leading to costly repairs and maintenance challenges due to the need for periodic replacement and reassembly.
Innovation Solution
The development of externally replaceable valve sleeves with a retaining mechanism that allows for quick and efficient installation and removal, reducing downtime and costs by using sacrificial materials for the sleeves that wear out before the valve body, and incorporating features like retention features and threaded components for secure coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If valve seats are made from erodible material to protect the valve body, then the valve body is protected from erosion, but the valve seats require periodic replacement which increases maintenance time and cost
Solution Approach 1:
The valve seat is divided into two separable components: a reusable valve body and a replaceable valve seat insert. This segmentation allows the seat insert to be independently replaced without replacing the entire valve assembly, reducing maintenance time while maintaining the protective function.
Solution Approach 2:
The erodible valve seat material is extracted as a separate removable insert that can be taken out and replaced independently from the valve body. This extraction enables quick replacement of only the worn component rather than the entire valve assembly.
2Reliability
If valve seats are replaced periodically to maintain sealing, then sealing performance is maintained, but the valve must be disassembled and reassembled which increases complexity and error risk
Solution Approach 1:
The valve seat is segmented into a permanent valve body and a removable seat insert. This segmentation simplifies the replacement process by allowing direct insertion and removal of only the seat component without disassembling the entire valve, reducing procedural complexity and error risk.
Solution Approach 2:
The valve seat insert is designed with dynamic replaceability through retaining mechanisms that allow quick installation and removal. This dynamic design enables maintenance personnel to replace seats without complex disassembly procedures, reducing both complexity and potential for errors.
3Ease of repair
If valve sleeves are made removable for maintenance, then maintenance cost is reduced, but the coupling mechanism adds device complexity
Solution Approach 1:
The valve seat insert is designed as a relatively inexpensive, replaceable component that can be quickly swapped out when worn. This approach reduces maintenance costs by replacing only the low-cost insert rather than the entire expensive valve assembly.
Solution Approach 2:
The coupling mechanism is segmented into simple retaining features on the insert and corresponding receptacles in the valve body. This segmentation creates a straightforward coupling system that is easy to implement and maintain, balancing the added complexity with the benefit of easy replacement.
Data Source
AI summary
Embodiments of the present disclosure include a valve sleeve for forming at least a portion of a valve flow passage. The valve sleeve includes a seat end having a seat face, the seat end extending at least partially into a chamber of a valve body. The valve sleeve also includes a sleeve portion coupled to the seat end and having a coupling end opposite the seat face, the coupling end comprising a retaining mechanism for removably coupling the valve sleeve to the valve body. The valve sleeve further includes an opening extending along a length of the valve sleeve, the opening forming at least a portion of the valve flow passage and having a generally circular cross section.