Closing Sleeve Assembly Ported Seal Erosion Protection
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Solution Overview
Problem
The erosion of sealing surfaces in closing sleeve assemblies by proppant slurry during gravel packing operations leads to a loss of fluid and pressure tight seal, compromising the effectiveness of wellbore operations.
Innovation Solution
A protective sleeve is positioned over the sealing surface, and the closing sleeve is configured to cover the sealing surface when in the open position, with an erosion-resistant material and coating, such as tungsten carbide and Nedox®, to prevent surface erosion and maintain a tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the closing sleeve is left uncovered to maintain operational access, then ease of operation is improved, but the sealing surface is eroded by proppant slurry, worsening reliability
Solution Approach 1:
A protective sleeve is positioned inside the closing sleeve assembly, nested within the existing structure. This inner protective sleeve is specifically positioned to cover the sealing surface while allowing the outer closing sleeve to maintain its operational functions. The nested configuration protects the sealing surface without interfering with the closing mechanism's ability to open and close.
Solution Approach 2:
The protective sleeve acts as an intermediary element between the proppant slurry and the sealing surface. It provides a sacrificial barrier that prevents direct contact between the erosive slurry and the critical sealing surface, thereby maintaining seal integrity while allowing normal operational access to remain unaffected.
2Reliability
If the closing sleeve is covered to protect the sealing surface, then reliability is improved, but access to the sealing surface is reduced, worsening ease of operation
Solution Approach 1:
The protective sleeve is nested within the closing sleeve assembly, creating a concentric configuration where the protective layer is accessible through the open end of the closing sleeve. This allows maintenance personnel to access and replace the protective sleeve without disassembling the entire closing mechanism, maintaining ease of operation while providing continuous protection.
Solution Approach 2:
The protective sleeve is designed as a separate, extractable component that can be independently removed and replaced. This extraction capability allows the protective element to be maintained separately from the main closing sleeve, ensuring that protection is always available while allowing operational access when needed.
3Reliability
If erosion-resistant material and coating are applied to the sealing surface, then reliability is improved, but manufacturing complexity increases, worsening ease of manufacture
Solution Approach 1:
The protective sleeve is designed as a disposable or easily replaceable component made from erosion-resistant materials. Rather than permanently coating the expensive closing sleeve assembly, a simpler, more economical protective sleeve provides the necessary erosion resistance and can be replaced when worn, significantly reducing manufacturing complexity and cost.
Solution Approach 2:
The protective sleeve utilizes composite material construction, combining erosion-resistant materials with the base structure. This composite approach provides superior erosion protection while maintaining manufacturing simplicity, as the protective layer can be applied as a separate coating or integrated during sleeve fabrication without requiring complex coating processes on the main assembly.
Data Source
AI summary
A closing sleeve assembly with a ported sleeve is disclosed. The closing sleeve assembly includes a housing; a port formed in the housing; a sealing surface formed in the housing adjacent to the port; and a closing sleeve configured to move between an open position and a closed position. The closing sleeve includes an uphole portion configured to substantially cover the sealing surface when the closing sleeve is moved to the open position; a port formed in the closing sleeve and configured to substantially overlap with the port formed in the housing when the closing sleeve is in the open position; and a seal configured to engage with the sealing surface to form a fluid and pressure tight seal when the closing sleeve is in the closed position.