Wellbore Junction Flow Control Device for Fluid Loss Prevention
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Solution Overview
Problem
Typical wellbore junction completions lack fluid loss control, leading to uncontrolled fluid flow and pressure issues during well operations.
Innovation Solution
A wellbore junction assembly with a tubular string and flow control device that isolates wellbore sections until the tubular string is installed, using a deflector and seals to establish sealed communication and access, and a frangible or rotatable barrier that opens to allow fluid flow when the string is inserted, preventing fluid loss and pressure issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wellbore junction completion is installed to provide connectivity between wellbore sections, then fluid communication and access between sections is enabled, but fluid loss control is not provided leading to uncontrolled fluid flow and pressure issues
Solution Approach 1:
A flow control device is installed in the wellbore junction assembly before the tubular string is inserted. The device includes a barrier (frangible or rotatable) that is positioned to block fluid flow paths in advance, ensuring fluid loss control is already in place before the string installation begins. This preliminary action prevents uncontrolled fluid flow during the installation process.
Solution Approach 2:
The flow control device acts as an intermediary element between the wellbore sections. It includes a body with fluid flow paths and a barrier that can be selectively removed or rotated. The barrier serves as a temporary mediator that controls fluid flow until the tubular string is properly installed and sealed, at which point the barrier is removed to enable communication between sections.
2Reliability
If a flow control device with a barrier is installed to prevent fluid loss, then fluid influx is prevented and pressure integrity is maintained, but fluid communication between wellbore sections is blocked until the string is installed
Solution Approach 1:
The flow control device incorporates a dynamic barrier that can change its state from blocking to non-blocking. The barrier is designed to be either frangible (breakable) or rotatable, allowing it to transition from a closed position that maintains pressure integrity to an open position that enables fluid communication. This dynamic characteristic allows the same device to fulfill both protective and communicative functions at different stages of installation.
Solution Approach 2:
The barrier in the flow control device is designed as a temporary, disposable element. If a frangible barrier is used, it is intentionally designed to break when the tubular string is inserted, sacrificing itself to enable permanent fluid communication. This disposable approach allows the barrier to fulfill its temporary protective function and then be easily removed to establish permanent connectivity.
Data Source
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AI summary
A method of installing a wellbore junction assembly in a well can include inserting a tubular string into a deflector, and opening a flow control device in response to the inserting. A well system can include a deflector positioned at an intersection between at least three wellbore sections, and a tubular string connector having at least two tubular strings connected to an end thereof, one tubular string being received in the deflector and engaged with a flow control device positioned in a wellbore section, and another tubular string being received in another wellbore section. Another method of installing a wellbore junction assembly in a well can include inserting a tubular string into a deflector positioned at a wellbore intersection, then sealingly engaging the tubular string, and then opening a flow control device in response to the inserting.