Downhole Window Joint Deflector Control for Lateral Tool Access
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Solution Overview
Problem
The challenge of efficiently directing equipment into and out of lateral pathways within a wellbore, which are often smaller and angled differently from the main pathway, is time-consuming and cumbersome due to the complexity of re-directing tools through downhole window joints.
Innovation Solution
Integration of deflectors and access control systems within window joints that are controlled remotely, allowing for selective redirection of equipment between main and lateral pathways using actuators like pistons, bar linkages, and electromagnetic tracks, enabling controlled transitions between states to facilitate efficient access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If equipment is manually re-directed through downhole window joints from main pathway to lateral pathway, then equipment can be placed in lateral pathways, but the operation becomes time-consuming and cumbersome
Solution Approach 1:
The patent applies dynamics by making the deflector movable rather than fixed. The deflector can be dynamically positioned between different states (blocking main pathway vs. allowing flow) in response to control signals, enabling real-time redirection of equipment without manual intervention. This dynamic capability resolves the contradiction by allowing rapid state changes that reduce both operational complexity and time requirements.
Solution Approach 2:
The patent replaces manual mechanical redirection operations with an automated control system. Instead of physically manipulating equipment through window joints, the system uses controlled deflectors that automatically redirect equipment based on received signals. This substitution eliminates the cumbersome manual process while maintaining the equipment placement function.
2Reliability
If multiple insertion operations are performed to place equipment in lateral pathways, then equipment can reach destinations, but wear and tear on equipment increases
Solution Approach 1:
The patent applies preliminary action by pre-positioning deflectors in their initial states and pre-configuring the control system with destination information. Before equipment insertion begins, the system is prepared to automatically redirect equipment at each junction based on pre-determined paths. This eliminates the need for multiple trial insertions and reduces equipment wear by ensuring correct redirection from the first attempt.
Solution Approach 2:
The system uses feedback by receiving control signals that indicate the desired destination and automatically adjusting deflector positions accordingly. This closed-loop control ensures equipment is redirected correctly without requiring multiple insertion attempts, thereby reducing wear and improving reliability while maintaining productivity.
3Extent of automation
If deflectors are integrated within window joints and controlled remotely, then control from surface is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the deflector mechanism to serve multiple functions: it can block the main pathway, allow flow through the main pathway, and redirect equipment to different lateral pathways. This multi-functionality is achieved through a single integrated control system that manages all deflectors uniformly, reducing overall system complexity despite the enhanced automation capabilities.
Data Source
AI summary
Lateral access control in downhole window joint is provided via a window joint. The window joint includes an interior cavity with a first end and a second end opposite to the first end, a first opening defined at the first end, and a lateral opening through a wall of the window joint and into the interior cavity between the first end and the second end. The window joint also includes a deflector where, in a first state, the deflector permits access between the first end and the second end and, in a second state, the deflector blocks access between the first end and the second end and permits access between the first end and the lateral opening by deflecting an object travelling through the lateral opening. The window joint also includes an access control system configured to transition the deflector between the first state and the second state.