Turbine-Driven Pipeline PIG for In-Flow Scale Removal
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Solution Overview
Problem
Existing pipeline maintenance technologies face challenges in effectively cleaning pipelines while fluid flow is ongoing, as halting fluid flow is impractical, and existing cleaning methods are inefficient in managing sediment and debris within pipelines.
Innovation Solution
A pipeline intervention gadget (PIG) equipped with a Kaplan turbine and a self-contained power source, featuring a rotating nosecone and cleaning tool, which uses fluid flow to drive the PIG and adjust its position within the pipeline, along with a control system to manage turbine pitch and iris valve aperture, enabling efficient sediment removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pipeline intervention gadget uses a Kaplan turbine to rotate and drive cleaning tools, then cleaning effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent combines the Kaplan turbine, nosecone rotation mechanism, and cleaning tools into a single integrated pipeline intervention gadget. The turbine drives the nosecone which in turn rotates the cleaning tools, merging propulsion and cleaning functions into one device, thereby improving cleaning effectiveness while managing complexity through functional integration.
Solution Approach 2:
The pipeline intervention gadget performs multiple functions: the Kaplan turbine provides propulsion by rotating the housing, the same turbine drives the nosecone rotation, and the nosecone drives the cleaning tools. This multi-functionality allows a single device to handle both movement and cleaning tasks, improving overall productivity.
2Adaptability or versatility
If the PIG operates with ongoing fluid flow to clean pipelines, then operational flexibility is improved, but cleaning efficiency deteriorates
Solution Approach 1:
The patent employs a Kaplan turbine with adjustable blade pitch that can dynamically adapt to varying fluid flow conditions. The turbine blades can change their angle to optimize performance across different flow rates, allowing the device to maintain cleaning effectiveness while operating flexibly with ongoing fluid flow rather than requiring flow interruption.
Solution Approach 2:
The system changes operational parameters by adjusting the turbine blade pitch angle and iris valve aperture to optimize cleaning performance under different flow conditions. This parameter adjustment allows the device to maintain high cleaning efficiency while adapting to the ongoing fluid flow environment, resolving the contradiction between flexibility and efficiency.
3Ease of operation
If a control system remotely controls turbine pitch and iris valve aperture, then operational control is improved, but device complexity increases
Solution Approach 1:
The patent incorporates a control system with communication rings that provide feedback between the remote operator and the PIG's turbine and iris valve. This feedback mechanism allows the operator to monitor and adjust turbine pitch and iris valve aperture in real-time, improving operational control while managing complexity through automated feedback loops rather than purely manual systems.
Solution Approach 2:
The communication rings act as intermediaries between the remote control system and the PIG's mechanical components. These rings transmit control signals and data without requiring direct physical connection, simplifying the interface between the operator and the complex turbine/valve system while maintaining precise operational control.
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 PIG efficiently cleans pipeline interiors by utilizing fluid flow to drive the cleaning tool and adjust its position, effectively managing sediment and debris, reducing maintenance costs and time, while allowing for operation within ongoing fluid flow.
Implementation Method 1
a turbine that rotates about the axis... operable to rotate the housing to move the pipeline intervention gadget through the pipeline
Implementation Method 2
a cleaning tool that extends from the nosecone to rotate therewith, the cleaning tool operable to clean the interior of a pipeline
Data Source
AI summary
The Razorback PIG leads to higher enthalpy, reduced cost, and higher fluid flow efficiency. This design uses adaptive speed control via a contra-propeller drive system, moving against or with the fluid as it travels and cleans along the inside of the pipeline, slowing down and focusing on build-up areas. This device executes tangential components in effect with linear components of velocity, developing vorticity, and results in the rotational movement for the front half of the PIG. The front rotational part excavates scale along pipe walls and reduces utility PIG smearing.