Downhole Tool Head Cutting Rim for Solid Breakdown
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Solution Overview
Problem
Precipitated solids such as ice and scales in pipelines and casings can block fluid flow, causing operational issues and tool stalling due to their size, which existing downhole tools are unable to effectively manage.
Innovation Solution
A downhole tool head with a hollow cylindrical body featuring a circumferential rim with cutting, grinding, and milling edges, and through-going holes that allow for the reduction of solid size by cutting and grinding, ensuring that solids can pass through without obstructing the tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing downhole tools are used to release precipitated solids, then the tool can remove some solids, but the tool gets stuck when encountering larger solids that cannot pass through
Solution Approach 1:
The tool head is segmented into multiple functional zones: a circumferential rim with cutting edges for initial solid breakdown, and multiple through-going holes of varying sizes for solid egress. This segmentation allows progressive size reduction of solids from the rim to the holes, preventing tool stalling while maintaining reliable operation.
Solution Approach 2:
The invention transitions from a single-dimension filtration approach to a multi-dimensional processing system. The circumferential rim operates in one dimension (cutting edges), while the through-going holes provide a second dimension (size-selective passage). This dimensional approach allows solids of various sizes to be managed effectively, preventing the tool from getting stuck.
2Reliability
If the tool head has small through-going holes to prevent solid passage, then solids cannot block the tool, but larger solids cannot pass through and cause stalling
Solution Approach 1:
The circumferential rim with cutting edges performs preliminary action by breaking down larger solids into smaller pieces before they reach the through-going holes. This preliminary size reduction ensures that solids can pass through the holes without causing tool stalling, while maintaining efficient solid removal capability.
Solution Approach 2:
Different parts of the tool head have different local qualities: the circumferential rim has cutting edges for breaking down solids, while the through-going holes have specific size characteristics for allowing passage. This local differentiation allows the tool to handle solids of various sizes effectively, balancing reliability with productivity.
3Ease of operation
If the tool head is designed with large holes to allow solid passage, then solids can pass through, but the tool becomes prone to blockages and stalling
Solution Approach 1:
The tool head segments the solid passage path into two stages: first through the circumferential rim with cutting edges for size reduction, then through multiple through-going holes for final passage. This segmentation prevents blockages while maintaining tool mobility by ensuring solids are reduced to appropriate sizes before entering the holes.
Solution Approach 2:
The invention uses a multi-dimensional approach where the circumferential rim operates in one dimension (cutting and size reduction) while the through-going holes provide a second dimension (size-selective passage). This dimensional differentiation allows the tool to maintain mobility while preventing blockages through coordinated action of different sized passages.
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 head effectively crushes and reduces the size of solids, preventing blockages and ensuring smooth operation by allowing larger solids to be broken down into smaller pieces that can pass through the tool, thus preventing tool stalling.
Implementation Method 1
the circumferential rim comprises a plurality of edges for cutting, grinding, drilling and/or milling
Implementation Method 2
the circumferential rim comprises a plurality of edges for cutting, grinding, drilling and/or milling
Implementation Method 3
the base part has a plurality of through-going holes for letting cavity fluid comprising precipitated solids pass the holes
Data Source
AI summary
The present invention relates to a downhole tool head (1) for mounting onto a downhole tool (10) for drilling in a formation downhole or for releasing precipitated solids (2), such as ice, scales or the like, in a cavity fluid in a pipeline, a casing (3), a well or any other cavity downhole. The downhole tool head comprises a hollow cylindrical body (4) with a circumferential wall (5) extending from a base part of the body, the circumferential wall having a circumferential rim (6) in its end opposite the base part. The circumferential rim (6) comprises a plurality of edges (8) for cutting, grinding, drilling and/or milling, and the base part has a plurality of through-going holes (9) for letting cavity fluid comprising precipitated solids pass the holes.