Segmented Clapper Valve Assembly for Secure Seal Retention
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Solution Overview
Problem
Clapper valves in oil and gas operations experience significant wear and reduced effectiveness due to turbulence and improper alignment, leading to seal dislodgment and structural failure.
Innovation Solution
A multi-component clapper design with different material properties for corrosion and wear resistance, featuring a threaded connection and a seal secured within a groove to maintain the seal's placement and prevent dislodgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a singular structural component clapper is used, then the device complexity is reduced, but the wear resistance and fatigue life deteriorate due to wear along critical areas such as the pin passageway
Solution Approach 1:
The clapper is divided into multiple separate components including a body portion, a pin passageway portion, and a sealing portion, each optimized for specific functions. This segmentation allows critical wear areas like the pin passageway to be replaced or maintained independently, improving reliability without requiring complete clapper replacement.
Solution Approach 2:
The clapper employs composite construction with different materials for different portions - such as using wear-resistant materials for the pin passageway area and corrosion-resistant materials for the body portion. This composite approach optimizes performance for each specific functional requirement while maintaining overall structural integrity.
2Device complexity
If the seal is not secured within a groove, then the device complexity is reduced, but the seal becomes dislodged or broken due to turbulence and continuous operation
Solution Approach 1:
The seal is pre-positioned within a groove and secured using retention features such as snap rings, clips, or interference fits before the clapper begins operation. This preliminary securing action prevents the seal from becoming dislodged during turbulent flow conditions or continuous operation, maintaining seal integrity without requiring complex active retention mechanisms.
3Reliability
If different material properties are used for corrosion and wear resistance, then the wear resistance and corrosion resistance are improved, but the device complexity increases due to multi-component construction
Solution Approach 1:
Different material properties are applied locally to specific portions of the clapper where they are most needed - such as using hard, wear-resistant materials specifically for the pin passageway area that experiences high friction, while using corrosion-resistant materials for the body portion exposed to fluid environments. This local quality approach optimizes performance without requiring complete multi-component construction throughout the entire clapper.
Data Source
AI summary
A clapper comprises a first valve body piece, a second valve body piece, wherein the second valve body piece is separate from the first valve body piece, and a seal. The first valve body piece has a seal groove. The second valve body piece has an angled edge. The seal is disposed in the seal groove of the first valve body piece. When the first and second valve body pieces are coupled together, radial compression of the seal between the seal groove and the angled edge causes the seal to be retained within the clapper.