Integrated Deflector Assembly for Multilateral Well Drilling
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Solution Overview
Problem
The existing methods for forming multilateral wellbores require multiple trips downhole to complete the well, increasing complexity and time, as they involve positioning a deflector assembly and then drilling lateral wellbores through windows or casing exits in the casing string.
Innovation Solution
A deflector assembly with a pre-formed window integrated into the casing string, allowing a drilling assembly to pass through with reduced resistance, enabling the drilling of lateral wellbores in a single trip by directing the drilling tool off the angled surfaces of the tubular housing and core plug, thereby reducing the number of trips required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a deflector assembly is positioned in the casing string with a running tool to form windows or casing exits, then lateral wellbores can be drilled from the main wellbore, but the number of trips downhole increases and completion complexity increases
Solution Approach 1:
The patent combines the deflector assembly and window mill into a single integrated tool that is run into the wellbore in one trip. The deflector assembly includes a body with a window and a mill that rotates to cut through the casing, allowing lateral wellbore drilling without requiring separate trips for deflector positioning and window formation.
Solution Approach 2:
The deflector assembly serves multiple functions: it deflects the drill string into the lateral direction, forms the window through the casing using the integrated mill, and provides a guide for the lateral wellbore drilling. This multi-functional design eliminates the need for separate tools and trips for each function.
2Adaptability or versatility
If multiple trips are made downhole to position deflector assembly and drill lateral wellbores, then lateral wellbores can be formed, but time and productivity are reduced
Solution Approach 1:
The deflector assembly and window mill are pre-integrated into a single tool configuration before being run into the wellbore. This preliminary integration allows both the deflector positioning and window formation to be accomplished in one trip, eliminating the need for multiple trips and significantly improving well completion productivity.
3Adaptability or versatility
If windows or casing exits are formed by deflecting a window mill relative to the casing string, then lateral wellbores can be established, but the number of trips downhole increases
Solution Approach 1:
The deflector assembly and window mill are merged into a single integrated tool that performs both deflection and window formation simultaneously in one trip, eliminating the time loss associated with multiple trips for separate operations.
Solution Approach 2:
The integrated deflector assembly maintains continuous useful action by simultaneously deflecting the drill string and forming the window through the casing in one continuous operation, rather than requiring separate discrete trips for each function.
Data Source
AI summary
A deflector assembly for an object in a well. The deflector assembly may include a tubular housing and a core plug. The tubular housing may include a window through a wall of the tubular housing, a deflector below the window. The deflector may include a cavity extending through an axial length of the deflector and a deflector angled surface that is shaped to direct the object toward the window. The core plug may be removably coupleable within the cavity and include a receptacle and a second angled surface that is shaped to direct the object toward the window. The second angled surface is aligned with the deflector angled surface. The core plug may be coupleable with the deflector so as to rotate with the deflector.