Downhole Service Tool Nesting for Compact Casing Machining
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Solution Overview
Problem
Existing technologies face challenges in accessing and performing mechanical operations behind a wellbore casing to facilitate hydrocarbon production, protect delicate systems, or modify the casing's interior surface.
Innovation Solution
A mechanical service tool equipped with anchors, cutters, a communication and control system, and sensors is used to extend and maneuver within the casing, allowing for machining, cutting, and other operations through a combination of actuators, impact systems, and rotary cutters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical service tool is deployed within a casing to perform machining operations, then access and modification capabilities are enhanced, but the complexity of the device increases due to the need for anchors, cutters, actuators, and control systems
Solution Approach 1:
The mechanical service tool employs a nested structure where the cutter is positioned within the tool body, anchors are folded against the tool body when not in use, and the caliper is retracted within the tool assembly. This nesting allows the complex multi-functional device to be conveyed through the casing in a compact form while maintaining full operational capability when deployed.
Solution Approach 2:
The mechanical service tool is divided into distinct functional segments: anchors for securing to the casing interior, a cutter for machining operations, actuators for controlling movement and extension, and a communication system for remote operation. This segmentation allows each component to be optimized independently while working together as an integrated system.
2Reliability
If anchors are extended to secure the mechanical service tool to the casing interior, then the tool's stability and positioning improve, but the risk of damaging internal components increases
Solution Approach 1:
The mechanical service tool incorporates a caliper with friction pads positioned between the anchors and the casing interior. This caliper acts as a cushioning element that distributes the securing force evenly across the casing surface, preventing concentrated loads that could damage internal components while maintaining adequate anchoring stability.
3Adaptability or versatility
If a cutter with drilling bit is extended from the mechanical service tool for machining operations, then cutting and machining capabilities are enabled, but the device complexity and operational risk increase
Solution Approach 1:
The cutter assembly is designed to be dynamically extendable and retractable relative to the mechanical service tool body. The cutter can be extended when machining operations are required and retracted when not in use, allowing the tool to transition between different operational states and reducing the risk of damage during conveyance and non-operational periods.
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 cutting of wellbore casings, enhancing access and modification capabilities while protecting internal components and facilitating hydrocarbon transport.
Implementation Method 1
The spring is coupled to the impact weight and the housing, and coils about an axis
Implementation Method 2
The impact weight is disposed within a housing of the mechanical service tool
Implementation Method 3
decelerating the impact weight and imposing a force on a drilling bit
Implementation Method 4
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.