Float Shoe Ball Valve Assembly for Wellbore Pressure Holding
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Solution Overview
Problem
Existing cementing operations in oil and gas wells face challenges with float shoe valves that cannot hold wellbore pressure, leading to inefficiencies in cement distribution and isolation.
Innovation Solution
A ball valve assembly with a spherical body and actuating mechanism, including a piston and biasing member, that can rotate between open and closed positions to manage fluid flow and pressure, ensuring effective cement distribution and isolation by preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flapper valve or poppet valve is used in the float shoe, then the valve can allow cement to flow out into the annulus, but the valve cannot hold wellbore pressure
Solution Approach 1:
The patent replaces the traditional flapper valve or poppet valve mechanical system with a ball valve mechanism. The ball valve uses a spherical body with a bore that can rotate to align or misalign with the flow path, providing both pressure holding capability and operational simplicity through rotational movement rather than complex flapper or poppet mechanisms.
Solution Approach 2:
The patent changes the operational parameter of the valve from linear movement (flapper/poppet) to rotational movement (ball valve). The ball valve body rotates between 0-90 degrees to control flow, changing the motion parameter while maintaining ease of operation and simultaneously achieving pressure holding capability that the previous valve types lacked.
2Reliability
If a ball valve is used to hold wellbore pressure, then pressure holding capability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the essential pressure holding function from complex multi-component valve mechanisms and implements it through a simplified ball valve system. By removing unnecessary components and retaining only the critical pressure containment and flow control functions, the design achieves pressure holding capability with reduced overall device complexity.
Solution Approach 2:
Instead of using traditional valve designs where the closing element moves perpendicular to the flow path, the ball valve inverts the approach by using a spherical body that rotates around its diameter. This inversion simplifies the mechanical structure while maintaining effective pressure holding and flow control capabilities.
3Reliability
If the spherical body is moved from opened to closed position, then backflow prevention is achieved, but the operation time increases
Solution Approach 1:
The patent replaces complex mechanical actuation systems with a simplified rotational mechanism. The ball valve body rotates to align or misalign its bore with the flow path, providing rapid backflow prevention. This rotational mechanism is faster and simpler than traditional valve actuation systems, reducing the time required to close the valve while ensuring reliable backflow prevention.
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 ball valve assembly effectively manages wellbore pressure, ensuring cement is distributed correctly and preventing backflow, thereby enhancing the cementing operation's efficiency and wellbore integrity.
Implementation Method 1
a ball valve with actuator arms which are moved using hydraulic pressure from a control line
Data Source
Figure 1~1B
Figure 2~2A
Figure 3~3B
AI summary
Embodiments of the invention generally relate to a ball valve assembly for use during a cementing operation. In one aspect, a ball valve is provided. The ball valve includes a housing. The ball valve further includes a spherical body disposed within the housing. Additionally, the ball valve includes an actuating member movable relative to the housing between a first position and a second position, wherein the movement of the actuating member causes the spherical body to rotate within the housing. In another aspect, a method of using a ball valve in a cementing operation is provided.