Hybrid Laser-Drill Pipe Descaling Tool
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Solution Overview
Problem
Current methods for removing scales from pipes are inefficient, costly, and can cause permanent damage, with repetitive maintenance needed due to continuous scale buildup, and existing treatments have limitations such as slow effectiveness and potential for pipe corrosion.
Innovation Solution
A robotic scale removal tool equipped with a laser head and a drilling shaft, allowing for precise movement in six degrees of freedom and debris removal, utilizing a laser beam to break down scales and a rotating drilling shaft to extract debris, reducing the need for chemical treatments and mechanical abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical dissolving methods are used to remove scales, then scales can be removed, but the process becomes expensive and time-consuming especially for heavy deposition
Solution Approach 1:
The patent replaces chemical dissolution methods with a mechanical laser-based system. The laser tool delivers high-energy laser beams to vaporize and remove scale deposits mechanically, eliminating the need for chemical reactions and significantly reducing treatment time while maintaining effectiveness for heavy deposition.
Solution Approach 2:
The patent changes the fundamental parameter of scale removal from chemical reaction rate to laser energy density. By controlling laser power, pulse duration, and scanning speed, the system achieves rapid scale removal without being constrained by chemical reaction kinetics, thereby reducing treatment time.
2Reliability
If mechanical milling is used to remove brittle scales, then scales can be removed, but the removal rate is limited to 5 to 30 feet/hour
Solution Approach 1:
The patent replaces traditional mechanical milling with a laser-based ablation system. The laser beam directly vaporizes scale material without mechanical contact, eliminating the slow cutting action of mills and achieving much higher removal rates while maintaining the ability to handle brittle scales.
Solution Approach 2:
The laser system uses pulsed laser operation with high peak power followed by cooling periods. This periodic action allows rapid material vaporization during pulse peaks while managing heat accumulation, achieving high productivity without compromising scale removal capability.
3Reliability
If water jetting combined with chemical washer fluid is used, then soft scales can be removed, but abrasive methods using acid may damage a pipe
Solution Approach 1:
The patent replaces acid-based chemical washing with pure laser ablation. The laser beam removes scales through direct energy absorption and vaporization without introducing corrosive chemicals, eliminating pipe damage from acid exposure while maintaining effectiveness on soft scales.
Solution Approach 2:
The laser beam acts as an intermediary that transfers energy to vaporize scale material without requiring direct contact with the pipe surface. This eliminates the need for abrasive particles or corrosive chemicals that could damage the pipe, achieving scale removal without harmful side effects.
4Reliability
If temporary treatments with inhibitors are used to prevent scales, then scales can be prevented from precipitating, but it requires 3 to 12 months to become effective
Solution Approach 1:
The laser system performs preliminary scale removal before scaling problems worsen. By periodically removing existing scale deposits, the system prevents future scaling issues without requiring long-term chemical inhibitor treatment, eliminating the 3-12 month delay for inhibitor effectiveness.
Solution Approach 2:
The patent replaces preventive chemical inhibition with periodic mechanical laser cleaning. Instead of relying on chemicals to prevent scaling over months, the laser system actively removes scale as it forms, providing immediate prevention效果 without chemical lag time.
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 tool effectively removes scales with minimal damage to the pipe, reducing downtime and maintenance frequency, and can operate in confined spaces like underground pipes, offering a more efficient and cost-effective solution compared to traditional methods.
Implementation Method 1
a laser tool including a laser head to output a laser beam
Implementation Method 2
rotating the drilling shaft to transport a debris generated from the scale along an axis of the drilling shaft
Data Source
AI summary
A tool that removes a scale inside a pipe includes: a laser tool including a laser head to output a laser beam, and a robotic arm that is articulated and that is connected to the laser head. The robotic arm includes segments that are connected by flexible robotic arm joints to enable movement of the laser head in six degrees of freedom, and a control system to control the robotic arm to direct output of the laser beam. The tool also includes a drilling shaft attached to the robotic arm of the laser tool.