Separable Mill Tool for Single-Run Wellbore Operations
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Solution Overview
Problem
In the resource recovery and CO2 sequestration industries, plug and abandonment operations require multiple runs to set a mechanical plug, cement, and test, which are expensive and time-consuming, hindering efficiency.
Innovation Solution
A separable tool with a mill section and tool adapter section, featuring a release configuration and an offset bore, allows for a single run to set a plug, pump cement, and test, reducing the need for multiple runs by enabling the tool to perform multiple operations simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple runs are used to set plug, cement, and test, then each operation can be performed separately and reliably, but the time and cost increase significantly
Solution Approach 1:
The patent combines multiple separate operations (plug setting, cementing, and testing) into a single integrated tool assembly that can perform all functions during one run. The tool includes a plug setting mechanism, a cementing mechanism with mixing and dispensing capabilities, and a testing mechanism all integrated together, allowing sequential execution of operations without retrieving the tool between steps.
Solution Approach 2:
The tool is designed as a universal multi-functional device that can set mechanical plugs, pump and mix cement, and test cement properties all within a single tool assembly. This multi-functionality eliminates the need for multiple specialized tools and runs, consolidating what were previously separate operations into one comprehensive tool that handles the entire sequence.
2Productivity
If multiple runs are conducted for plug and abandonment operations, then each step can be completed thoroughly, but the overall productivity decreases
Solution Approach 1:
The patent merges plug setting, cementing operations, and cement testing into a single integrated tool that performs all functions during one continuous run. The tool assembly includes all necessary mechanisms (plug setting device, cement mixing system, cement pumping capability, and testing apparatus) that work sequentially without requiring tool retrieval or replacement between operations.
Solution Approach 2:
The tool enables continuous operation by maintaining its position in the wellbore throughout the entire sequence of operations. After setting the plug, the tool remains in place to pump cement, mix additional cement, and perform testing without being retrieved to surface, thereby eliminating non-productive time and maintaining continuous useful action throughout the procedure.
3Loss of time
If a single run is used to perform multiple operations, then time and cost are reduced, but the tool complexity increases
Solution Approach 1:
The tool is segmented into distinct functional modules including a plug setting mechanism, a cementing mechanism with separate mixing and pumping components, and a testing mechanism. Each module is designed as a relatively independent unit that can be manufactured and assembled separately, then integrated into the complete tool assembly, thereby managing complexity through modular design.
Solution Approach 2:
The tool employs a nested structure where the mixing mechanism is positioned within or adjacent to the pumping mechanism, and the testing apparatus is integrated into the overall assembly. Components are arranged in a compact nested configuration that minimizes the overall tool size and complexity while maintaining all required functions, with smaller mechanisms fitted within or alongside larger ones.
Data Source
AI summary
A separable tool including a mill section, a mill face disposed on the mill section and having a bore therethrough that is offset from a longitudinal axis of the mill section, a tool adapter section, and a release configuration releasably securing the mill section to the tool adapter section with the mill face disposed between the mill section and the tool adapter section. A method for operating a wellbore system including in a single run, setting a plug in the wellbore system, releasing the plug, pumping cement, dressing the cement, and testing the cement.