High Pressure Multibore Junction Assembly Reentry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Commercially available multibore junction assemblies for lateral wellbores either lack reentry capability or cannot withstand wellbore pressures above 5400 psi due to their design and construction, limiting their effectiveness in high-pressure completion and production operations.
Innovation Solution
A high-pressure multibore junction assembly with a tubular main leg and lateral leg design, featuring threaded connections and a stabilizer, which increases the pressure rating and allows for reentry capabilities, enabling secure positioning and tool access in wellbores with pressures up to 6000 psi or greater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If commercially available multibore junction assemblies are used, then the device can be easily manufactured and installed, but the pressure rating is limited to below 5400 psi and reentry capability is lost
Solution Approach 1:
The multibore junction assembly is divided into separate tubular main leg and lateral leg components that can be independently manufactured and then assembled through threaded connections. This segmentation allows each component to be optimized for high pressure while maintaining manufacturing feasibility, resolving the contradiction between strength and device complexity.
Solution Approach 2:
The assembly uses composite construction combining multiple tubular components with different functions (main leg for structural support, lateral leg for wellbore access, stabilizer for positioning) connected through standardized threaded interfaces. This composite approach enables high pressure rating while keeping individual components manufacturable.
2Strength
If the multibore junction assembly is designed for high pressure resistance, then the pressure rating increases, but reentry capability is compromised
Solution Approach 1:
The tubular main leg and lateral leg are designed with universal features including threaded connections for assembly/disassembly and openings that accommodate various tool sizes. This multi-functionality enables the structure to maintain high pressure integrity while allowing reentry operations, resolving the contradiction between strength and adaptability.
3Adaptability or versatility
If the multibore junction assembly allows tool reentry, then operational flexibility is improved, but structural integrity under high pressure is compromised
Solution Approach 1:
The assembly incorporates dynamic features such as stabilizer positioning capabilities and tool passage openings that can accommodate reentry operations. These dynamic elements are integrated into the high-strength tubular structure through careful design of wall thickness and reinforcement, allowing the structure to adapt to reentry operations while maintaining structural integrity under high pressure.
Data Source
AI summary
A high pressure multibore junction assembly and method for completion of a lateral wellbore using a high pressure multibore junction assembly, which comprises a tubular main leg and a tubular lateral leg. The tubular main leg is secured within a main wellbore and the tubular lateral leg is positioned through a lateral wellbore. The tubular main leg and the tubular lateral leg may be stabilized relative to each other as the multibore junction assembly is lowered into the main wellbore.