Downhole Service Tool Anchoring and Casing Access Machining
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Solution Overview
Problem
Existing technologies face challenges in gaining access behind the casing within a wellbore for mechanical operations such as machining, cutting, and flow control, while maintaining the integrity of the casing to protect delicate systems from abrasion and corrosion.
Innovation Solution
The mechanical service tool employs anchors, cutters, sensors, and a communication and control system to securely fasten to the casing interior, allowing for machining operations using cutters, impact systems, and flow control devices, while utilizing patching tools to maintain integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the casing is used to protect delicate systems from physical damage, then reliability is improved, but access behind the casing for mechanical operations becomes restricted
Solution Approach 1:
The system segments the casing into sections, allowing localized access through drilling or cutting operations at specific depths while maintaining the integrity and protective function of the remaining casing structure. This enables mechanical operations behind the casing without compromising overall system protection.
Solution Approach 2:
The patent introduces intermediary tools such as drill bits, cutters, and service tools that can be deployed through the casing or at controlled access points to perform mechanical operations behind the casing. These intermediary devices enable access and operations without removing or compromising the protective casing structure.
2Stability of the object's composition
If anchors are used to fasten the mechanical service tool to the casing interior, then stability is improved, but the complexity of the device increases
Solution Approach 1:
The anchors serve multiple functions: they provide stable attachment to the casing interior, enable positioning of the mechanical service tool at specific depths, and can be integrated with other components such as cutters or drill bits. This multi-functionality reduces the need for separate systems and minimizes overall device complexity.
Solution Approach 2:
The anchors are integrated into the structure of the mechanical service tool, with components nested within each other. The anchors can be stored in a retracted position within the tool body and deployed when needed, reducing the overall footprint and simplifying the device structure while maintaining stability during operation.
3Ease of operation
If cutters are used to machine the interior surface of the casing, then access and flow control are improved, but the risk of compromising casing integrity increases
Solution Approach 1:
The cutters are designed to machine only specific localized areas of the casing interior surface where flow control or access is needed. The machining operations are confined to small regions that do not compromise the overall structural integrity of the casing, allowing flow regulation while maintaining reliability.
Solution Approach 2:
The cutting operation removes only the minimal amount of material necessary to create the desired flow control feature or access point. By applying partial action rather than extensive material removal, the system achieves the required functionality while preserving the majority of the casing structure and its integrity.
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
Enables efficient machining and flow control within the casing, ensuring stability and protection against abrasion and corrosion, facilitating complex geometry cuts and fluid regulation.
Implementation Method 1
The spring is coupled to the impact weight and the housing, and coils about an axis. The hammer mechanism engages or disengages the at least one shaft from the driving motor.
Implementation Method 2
unwinding the spring about the axis and accelerating an impact weight of the impact system. Furthermore, the method includes decelerating the impact weight and imposing a force on a drilling bit.
Implementation Method 3
The caliper includes a friction pad that contacts an interior surface of a wellbore casing.
Data Source
AI summary
A mechanical service tool that may include one or more anchors, a cutter, a communication and control system, and one or more sensors, as well as methods for operating the mechanical service tool, are provided. The one or more anchors may extend radially from the mechanical service tool and the cutter may move relative to the mechanical service tool. The cutter may include a drilling bit. The communication and control system may obtain remote commands that control the cutter, the one or more anchors, or both. The one or more sensors may detect operational conditions of the mechanical service tool and may be operatively coupled to the communication and control system.