Hydraulically Deployable Wellbore Scraper Assembly for Single-Trip Cleaning
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Solution Overview
Problem
Current wireline based wellbore scraper assemblies are inefficient as they require multiple trips to clean and set wellbore tools, risking debris reintroduction and inaccurate tool placement, and existing systems lack the capability to clean effectively while deploying tools in a single operation.
Innovation Solution
A wireline based scraper system with hydraulically deployable scraper features and a hydraulic power pack that allows for simultaneous cleaning of the wellbore casing and setting of wellbore tools, utilizing a catch basket and jar mechanism for debris collection and tool deployment assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wireline based scraper assemblies are used, then deployment cost and time are reduced compared to rigid tubing systems, but multiple trips are required to clean and set tools, increasing total operational time and risk of debris reintroduction
Solution Approach 1:
The patent combines the scraping function and tool setting function into a single integrated assembly. The scraper features are positioned above the wellbore tool on the same wireline, allowing both cleaning and tool deployment to occur during one continuous operation, eliminating the need for separate trips required by conventional systems.
Solution Approach 2:
The scraping action is performed in advance of tool setting within the same operational sequence. The scraper features clean the wellbore casing wall before the wellbore tool reaches its setting position, ensuring the tool is deployed into a pre-cleaned environment without requiring separate cleaning operations.
2Reliability
If multiple trips are used to clean and set tools, then cleaning can be performed, but there is risk of new debris being introduced between trips and inaccurate tool placement
Solution Approach 1:
By merging the scraping and tool setting operations into a single integrated assembly deployed in one trip, the system eliminates the time gap between cleaning and tool deployment that allows debris to be reintroduced. The continuous operation ensures tool placement accuracy by maintaining the cleaned state from scraping through to tool setting.
3Ease of operation
If scraper features are placed on wireline, then deployment without derrick is possible, but no other wellbore tools can be placed below the scraper
Solution Approach 1:
The assembly is segmented into distinct functional components: scraper features positioned above and a wellbore tool positioned below, both on the same wireline. This segmentation allows the scraper to perform its cleaning function while the wellbore tool simultaneously or subsequently performs its function at a lower position, enabling versatile operations in a single deployment.
Solution Approach 2:
The system adds vertical dimensionality to the wireline deployment by positioning multiple functional elements at different heights on the same wireline. The scraper features operate at an upper position while the wellbore tool operates at a lower position, allowing both functions to coexist without interfering with each other's spatial requirements.
4Reliability
If rigid tubing based scraper assemblies are used, then effective cleaning is achieved, but deployment requires derrick and is time consuming
Solution Approach 1:
The scraper features are actuated using hydraulic pressure transmitted through fluid conduits from a hydraulic power pack on the wireline. This hydraulic actuation mechanism replaces the rigid tubing deployment system, allowing the scraper features to be deployed and retracted efficiently without requiring a derrick, thereby reducing deployment time while maintaining cleaning effectiveness.
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 single-trip cleaning and tool deployment, providing real-time tension feedback and minimizing run-in-hole diameter for precise tool placement, reducing operational time and costs while ensuring cleanliness and accuracy.
Implementation Method 1
a hydraulic deployment system coupled to the plurality of hydraulically deployable scraper features, the hydraulic deployment system configured to move the plurality of hydraulically deployable scraper features from the first state to the second state
Implementation Method 2
jar mechanism for debris collection and tool deployment assistance
Data Source
AI summary
Provided is a wellbore scraper assembly for use with a wireline. The wellbore scraper assembly, in one example, includes a tubular housing, a plurality of hydraulically deployable scraper features associated with the tubular housing, the plurality of hydraulically deployable scraper features configured to move from a first retracted state to a second radially extended state, and a hydraulic deployment system coupled to the plurality of hydraulically deployable scraper features, the hydraulic deployment system configured to move the plurality of hydraulically deployable scraper features from the first state to the second state.