Downhole Shut-In Device Screen Prevents Particulate Plugging
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Solution Overview
Problem
Downhole shut-in devices in wellbores often plug due to particulates, leading to reduced operational life and reliability, as particulates can abrade sealing surfaces and lodge in inlets, preventing proper operation.
Innovation Solution
A wellbore downhole shut-in device with a valve body, inner sleeve, actuation mechanism, and a screen or strainer system that filters particulates from the fluid flow, preventing them from entering the valve body and maintaining the inlet clear, thereby reducing particulate accumulation and ensuring proper operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no screen or strainer is installed, then the device structure remains simple, but particulates enter the valve body and cause plugging
Solution Approach 1:
The screen or strainer is installed upstream of the valve body inlet to preliminarily filter particulates from the fluid flow before they can enter and plug the valve body. This preliminary filtering action prevents the harmful effect of particulate accumulation on the valve components.
2Reliability
If a screen is installed to filter particulates, then the inlet remains clear of particulates, but the device structure becomes more complex
Solution Approach 1:
The screen or strainer acts as an intermediary component between the fluid flow containing particulates and the valve body. It mediates by filtering out the harmful particulates while allowing the fluid to pass through, thus protecting the valve body without requiring fundamental design changes to the valve itself.
3Reliability
If multiple screens with different rib configurations are used, then filtering effectiveness increases, but manufacturing complexity increases
Solution Approach 1:
The filtering system is segmented into multiple screens with different rib configurations (e.g., first screen with first rib pattern, second screen with second rib pattern). Each screen segment targets different particulate sizes or types, and they are arranged in sequence to provide progressive filtering, with the finest filtration occurring at the inlet side.
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 increases the operating life and reliability of downhole shut-in devices by effectively filtering out particulates, preventing them from clogging the inlets and ensuring the inner sleeve can move between open and closed positions as intended, thus maintaining the device's functionality.
Implementation Method 1
The screen filter a particulate from the fluid flow from the wellbore through the inlet of the valve body
Data Source
AI summary
An assembly and a method for filtering a particulate from a wellbore fluid flow entering a downhole shut-in device in a wellbore are described. The downhole shut-in device includes a valve body with an inlet. An inner sleeve is coupled to an inner surface of the valve body and moves between a closed position and an open position to control a fluid flow from the wellbore through the inlet of the valve body. The downhole shut-in device includes a screen surrounding an outer surface of the valve body to filter the particulate from the fluid flow through the inlet of the valve body. Some devices also include a strainer tool with a cylindrical housing and an internal strainer. The method includes identifying a production fluid flow containing particulates of a size and quantity to be filtered from entering the downhole shut-in device.