Smooth Bore Toe Valve Sleeve Actuation
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Solution Overview
Problem
Toe valves often fail to initiate circulation in well bore cementing operations due to cement left behind, which existing wiper devices are unable to remove, leading to blockages and incomplete completion processes.
Innovation Solution
A smooth bore toe valve design featuring a first and second sub, a housing, and a sleeve that closes and opens openings in response to fluid pressure, allowing for the creation of a differential pressure to move the sleeve from a closed to an open position, facilitating fluid flow and potentially removing residual cement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a conventional toe valve with complex internal structure is used, then it may provide more flow paths, but it creates more crevices where cement can accumulate and block the valve
Solution Approach 1:
The patent employs smooth curved surfaces throughout the valve body, replacing sharp corners and crevices with radiused transitions. The valve cavity features continuously curved walls that guide fluid flow without creating stagnant zones, while the sleeve and opening mechanisms utilize arc-shaped profiles that prevent cement deposition. This curvature principle eliminates the geometric features where cement would otherwise accumulate and block flow paths.
Solution Approach 2:
The patent creates a homogeneous smooth bore environment throughout the valve by maintaining uniform surface characteristics and consistent flow path geometry. The internal passages are designed with uniform cross-sections and smooth transitions, avoiding sudden expansions or contractions that would create turbulence and cement deposition. This homogeneity ensures that cement slurry flows uniformly without accumulating in irregular zones.
2Object-affected harmful factors
If a smooth bore design is used, then cement residue is reduced, but the valve mechanism becomes more sensitive to pressure differentials
Solution Approach 1:
The patent incorporates cushioning features in the form of gradual pressure transition zones within the smooth bore cavity. These zones allow pressure differentials to build and release gradually, preventing sudden pressure spikes that could cause premature or erratic valve opening. The smooth curved geometry provides natural pressure cushioning by distributing force evenly across the sleeve, making the valve less sensitive to transient pressure fluctuations while maintaining reliable operation.
Solution Approach 2:
The patent utilizes the dynamic interaction between the smooth bore geometry and fluid pressure to achieve reliable valve operation. The sleeve is designed to respond dynamically to sustained pressure differentials while being cushioned against transient fluctuations. The smooth curved surfaces create a dynamic pressure distribution that ensures the valve opens reliably when needed while being protected from premature activation by transient pressure changes.
3Productivity
If the valve cavity is enlarged to accommodate the smooth bore design, then the device size increases, but it may improve fluid circulation
Solution Approach 1:
The patent designs the valve cavity to serve multiple functions simultaneously: it provides the necessary volume for smooth bore flow patterns, accommodates the sleeve opening mechanism, and creates adequate space for pressure equalization. The cavity geometry is optimized to perform circulation enhancement, structural support, and mechanism accommodation in a single integrated component, avoiding the need for separate elements that would increase overall valve size.
Solution Approach 2:
The patent utilizes three-dimensional curved surfaces and spatial optimization to achieve enhanced fluid circulation without proportionally increasing valve volume. By employing radial and axial curvature in combination, the design creates efficient flow paths that maximize circulation within the available space. The smooth bore cavity uses dimensional optimization to provide adequate flow volume while maintaining a compact overall valve footprint.
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 effectively opens the toe valve, enabling fluid circulation and potentially addressing the issue of cement residue, thereby improving the completion process by ensuring proper well bore re-opening and fluid circulation.
Implementation Method 1
upon application of fluid pressure from the through bore through the fluid flow path, open the openings
Implementation Method 2
produces a differential pressure across the sleeve to move it from a position in which the openings are closed and a position in which the openings are open
Data Source
AI summary
A smooth bore toe valve includes a first sub defining a through bore and a fluid flow path through a wall thereof; a second sub; a housing mechanically engaged with the first and second subs to define a valve cavity axially between the first and second subs and to define a chamber radially between the first and second subs and the housing, the housing further defining a plurality of openings in a wall thereof; and a sleeve disposed within the chamber between the housing and the first and second subs to close the openings and, upon application of fluid pressure horn the through bore through the fluid flow path, open the openings to fluid flow from the valve cavity to the exterior of the housing. A method for using such a valve is also disclosed.