Intercepting and Redistributing Drilling Fluid Device
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Solution Overview
Problem
Existing devices for intercepting and redistributing drilling fluid in continuous circulation drilling methods suffer from excessive wear and flow rate limitations, particularly at high flow rates or with erosive fluids, leading to maintenance issues and disrupted drilling processes.
Innovation Solution
A device with interconnected auxiliary chambers that allow for fluid communication, enabling high flow rates and reducing wear by managing drilling fluid flow through a system of valves and chambers, ensuring continuous circulation during drill rod extension and drilling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the whole drilling fluid flow rate passes through only one auxiliary chamber, then the device structure is simpler, but localized wear increases significantly and maintenance operations are required
Solution Approach 1:
The single auxiliary chamber is divided into two separate auxiliary chambers (first auxiliary chamber and second auxiliary chamber) that are in fluid communication with each other. This segmentation allows the drilling fluid flow to be distributed across multiple chambers, reducing localized wear on flow direction changing sections while maintaining manageable device complexity through systematic arrangement.
2Productivity
If high flow rates are used for large diameter bores, then drilling productivity increases, but wear on flow direction sections increases significantly
Solution Approach 1:
By segmenting the flow path into multiple auxiliary chambers connected in series, the high flow rate is distributed across multiple sections rather than concentrating wear in a single section. This allows high productivity to be maintained while reducing localized wear through the multi-chamber configuration.
3Productivity
If high density erosive drilling fluids are used, then drilling efficiency improves, but wear on device components increases
Solution Approach 1:
The erosive high density drilling fluid is circulated through multiple auxiliary chambers in sequence, distributing the erosive impact across multiple chambers rather than concentrating it in one location. This segmentation reduces the harmful erosive wear on any single component while maintaining drilling efficiency.
4Reliability
If maintenance operations are performed on the device, then wear is addressed, but continuity of drilling procedure is compromised
Solution Approach 1:
By having multiple auxiliary chambers that can potentially be isolated or operated in different modes, the system allows for reduced maintenance frequency compared to single-chamber designs. The segmented structure enables the device to handle high flow rates and erosive fluids better, thereby reducing the frequency of maintenance interruptions and maintaining drilling continuity.
Data Source
AI summary
A method for drilling a well in continuous circulation and a device for intercepting and redistributing fluids for this drilling method wherein said device comprises a main chamber (5) communicating with a first auxiliary chamber (6) and with a second auxiliary chamber (7), in which during the direct drilling flow (F1) mode, said auxiliary chambers (6,7) are placed in fluid communication with each other.