Drillable Casing Scraper Reduces Wellbore Trip Count
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Solution Overview
Problem
Current wellbore drilling and production operations require multiple trips to isolate zones, clean the casing, and perform operations, which is inefficient and time-consuming.
Innovation Solution
A drillable casing scraper system that includes a downhole tool with a casing scraper, isolation tool, and setting tool, which cleans debris from the casing inner surface, sets the isolation tool, and is later drilled out, reducing the number of trips needed for these operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple trips are made to clean the casing, set isolation tools, and perform wellbore operations, then each operation can be completed effectively, but the total time and number of trips required increases significantly
Solution Approach 1:
The patent combines multiple separate operations (casing cleaning, isolation tool setting, and wellbore operations) into a single integrated tool assembly. The drillable casing scraper includes both scraping elements for cleaning and an isolation tool setting mechanism, allowing both functions to be performed during one trip into the wellbore, thereby reducing the total number of trips required while maintaining effective cleaning and isolation.
Solution Approach 2:
The downhole tool assembly is designed with multi-functionality, serving both as a casing cleaning device and an isolation tool setting device. The drillable casing scraper can clean the casing inner surface and subsequently set the isolation tool at the desired depth, making the tool system universal and capable of performing multiple functions that previously required separate operations and trips.
2Reliability
If separate operations are performed for cleaning and isolation, then each function can be optimized independently, but the device complexity and number of tools required increases
Solution Approach 1:
The patent merges the casing cleaning function and isolation tool setting function into a single integrated drillable casing scraper assembly. This consolidation reduces the number of separate tools required while maintaining the functional performance of both cleaning and isolation operations through the combined design of scraping elements and isolation tool setting mechanisms within one tool string.
Data Source
AI summary
An apparatus, system, and method according to which debris is cleaned from a casing that extends within a wellbore. The method generally includes running a downhole tool into the casing, the downhole tool comprising an isolation tool, a setting tool, and a casing scraper. Debris is then cleaned from an inner surface of the casing at a depth interval using the casing scraper. After cleaning the debris from the inner surface of the casing, the isolation tool is set against the inner surface of the casing at the depth interval using the setting tool to isolate a zone of the wellbore. After setting the isolation tool against the inner surface of the casing, a wellbore operation is performed in which isolation of the zone of the wellbore is required. The downhole tool is then drilled out of the casing using a drill bit.