Alignable Guidance Device for Casing Entry Milling
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Solution Overview
Problem
Existing methods for gaining hydraulic access to an existing cased wellbore are inefficient and pose risks, such as blowouts or improper abandonment, which can lead to leaks and require costly interventions like drilling intercept wells.
Innovation Solution
An alignable guidance device comprising a tube section, a casing milling shoe, and a pre-contoured tube within the shoe, which includes guidance sensors and an EM communications system, allowing for precise alignment and hydraulic access to the in-situ casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional casing entry methods are used to gain hydraulic access to an existing cased wellbore, then the operation can be performed, but the process is inefficient and poses risks such as blowouts and leaks
Solution Approach 1:
The guidance device is deployed and aligned with the wellbore before the milling operation begins. The pre-contoured tube is positioned in advance to define the exact path for hydraulic access, allowing the milling tool to follow a predetermined safe trajectory rather than requiring trial-and-error approaches
Solution Approach 2:
The alignable guidance device acts as an intermediary between the drilling equipment and the existing wellbore. It provides a controlled interface that guides the milling tool through the casing wall while maintaining wellbore integrity and preventing uncontrolled releases
2Reliability
If precise alignment is achieved using guidance sensors and EM communications system, then the risk of blowouts and leaks is reduced, but the device complexity increases
Solution Approach 1:
The guidance device integrates multiple functions into a single system: the guidance sensors provide alignment data, the EM communications system transmits this data to the surface, and the pre-contoured tube physically guides the milling path. This multi-functional integration reduces the need for separate equipment and procedures
Solution Approach 2:
The guidance sensors continuously monitor the position and orientation of the device relative to the wellbore, and this information is transmitted via the EM communications system to the surface where it can be used to adjust the milling operation in real-time, ensuring precise alignment and preventing deviations that could lead to blowouts or leaks
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The guidance device enables precise alignment and milling of the casing, reducing the risk of blowouts and leaks, and facilitating efficient hydraulic access and cementing operations, thereby improving wellbore management and safety.
Implementation Method 1
guidance device EM communications system within the tube section, the guidance device EM communications system in electrical communication with the guidance sensors
Data Source
AI summary
An alignable guidance device includes a tube section and a casing milling shoe within the tube section, a pre-contoured tube within the casing milling shoe that terminates in an exit point in the tube section, the pre-contoured tube exiting the tube section at an exit angle of between 0° and 45°. The alignable guidance device also includes guidance sensors within the tube section and a guidance device EM communications system within the tube section, the guidance device EM communications system in electrical communication with the guidance sensors.