Auto Cleaning Pipe Screen for Drilling Fluid Filtration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current drilling operations face challenges with downhole and surface filter screens, which are difficult to install, maintain, and clean, often leading to blockages and damage, resulting in their underutilization due to the inconvenience of manual maintenance and the risk of debris accumulation.
Innovation Solution
An auto cleaning system that includes multiple lines with pressure sensors and valves, an auto clean pump, and a controller to divert drilling fluid and remove unwanted material from the system, allowing for automated cleaning without the need to pull out the drill string or disconnect the top drive, ensuring continuous operation and reducing debris-related issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cleaning and maintenance of filter screens is performed, then debris can be removed, but drilling operations must be interrupted and the drill string pulled out of the wellbore
Solution Approach 1:
The filter screen cleaning function is extracted from the downhole environment and brought to the surface through a dedicated cleaning system. The cleaning system includes a cleaning fluid delivery mechanism that injects cleaning fluid through the filter screen while it remains installed in the drill string, separating the cleaning operation from the drilling operation and eliminating the need to pull out the drill string for maintenance.
Solution Approach 2:
The system performs preliminary cleaning actions by continuously or periodically cleaning the filter screen during drilling operations rather than waiting for debris accumulation to require intervention. The automated cleaning system monitors filter screen status and initiates cleaning before the filter becomes blocked, preventing operational interruptions.
2Reliability
If downhole filter screens are installed to filter debris, then drilling fluid quality improves, but the filter screens are easily damaged and require complex installation and removal procedures
Solution Approach 1:
The filter screen assembly is designed with multi-functionality, serving both as a filtration device and as an integrated cleaning system. The same filter screen that captures debris also receives cleaning fluid through its structure, and the system includes universal components that can be applied to different drill string configurations, reducing overall system complexity.
Solution Approach 2:
The filter screen performs self-cleaning through the automated cleaning system that directs cleaning fluid through the filter screen structure. The system monitors its own performance through pressure differentials and automatically initiates cleaning when needed, eliminating the need for manual intervention and complex maintenance procedures.
3Reliability
If surface pipe screens are used to filter drilling mud, then finer particulates are caught, but they require constant maintenance and must be removed when new drill pipe segments are added
Solution Approach 1:
The filter screen system maintains continuous filtration capability during drilling operations. The automated cleaning system ensures the filter screen remains functional without interruption to the drilling process, and the design allows the filter to remain installed in the drill string throughout the addition of new pipe segments, eliminating repeated installation and removal cycles.
Solution Approach 2:
The system is designed to be dynamic and adaptable to changing drilling conditions. The automated cleaning system adjusts cleaning frequency and intensity based on real-time monitoring of filter screen performance, and the filter screen itself is designed to accommodate the dynamic addition of drill pipe segments without requiring removal.
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 auto cleaning system effectively maintains the drilling fluid by automatically diverting fluid to the auto clean pump for filtration, reducing the risk of blockages and equipment damage, enabling continuous drilling operations and minimizing manual intervention.
Implementation Method 1
a first pressure sensor configured to measure a first pressure of the drilling fluid in the first line at an entrance point, a second pressure sensor configured to measure a second pressure of the drilling fluid in the first line at an exit point
Implementation Method 2
an auto clean pump operatively connected to the first auto clean valve and the second auto clean valve via an auto clean line, the auto clean pump configured to receive the drilling fluid from the first line or the second line and remove unwanted material from the drilling fluid
Data Source
AI summary
An auto cleaning system for cleaning a drilling fluid in a drilling operation, includes a controller configured to determine the difference between a pressure reading by a first pressure sensor and a second pressure sensor is above a predetermined threshold value, and at least partially open an entrance valve on a second line to divert drilling fluid intake from a first line to the second line, and close the entrance valve on the first line to stop the drilling fluid from entering the first line.