Well Cleaning Tool With Brush And Electromagnetic Coil
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Solution Overview
Problem
In well cleaning operations, particularly in horizontal wells, debris such as drill cuttings, sticky petroleum residues, and particulates accumulate along the well wall, causing accessibility issues and equipment malfunctions due to uneven distribution and adherence, which existing tools struggle to address effectively.
Innovation Solution
A well cleaning tool equipped with a steerable assembly sub, conveying device, rotatable brush assembly, electromagnetic coil for capturing metallic debris, noise detector, and multiple nozzles for fluid delivery, allowing for targeted debris removal and centralization within the well, enabling efficient dislodging and carrying away of debris with well fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional cleaning tools are used in horizontal wells, then debris removal capability is limited, but device complexity increases when adding multiple cleaning mechanisms
Solution Approach 1:
The patent combines multiple cleaning mechanisms (rotating brushes, jet nozzles, electromagnetic coils) into a single integrated cleaning tool assembly that can simultaneously address different types of debris through coordinated action, rather than requiring separate tools for each cleaning function
Solution Approach 2:
The cleaning tool is designed with multi-functional capabilities to handle various debris types (metallic and non-metallic) and cleaning requirements (mechanical scraping and chemical dissolution) within a single device, making it universally applicable to different well cleaning scenarios
2Reliability
If multiple cleaning operations are performed to remove all debris types, then cleaning effectiveness improves, but loss of time increases
Solution Approach 1:
The cleaning tool maintains continuous cleaning action throughout its deployment in the well, with rotating brushes and jet nozzles operating simultaneously along the entire wellbore length, eliminating the need to retrieve and re-deploy tools for different cleaning tasks
Solution Approach 2:
The tool performs preliminary mechanical cleaning with brushes before chemical dissolution can occur, preparing the debris for more effective removal and reducing the overall time required for complete cleaning
3Reliability
If brush assembly rotates at high speed to remove sticky residues, then cleaning effectiveness improves, but use of energy increases
Solution Approach 1:
The tool uses hydraulic jet nozzles to deliver high-pressure fluid streams that assist the brush assembly in removing sticky residues, reducing the mechanical energy required from the motor while maintaining or enhancing cleaning effectiveness
Solution Approach 2:
The cleaning system changes operational parameters by combining mechanical brushing with chemical dissolution through fluid injection, allowing effective cleaning at lower rotational speeds and reducing overall energy consumption
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 effectively removes both metallic and non-metallic debris, including sticky residues, from well walls, enhancing operational efficiency and reducing the need for multiple cleaning operations, while monitoring debris presence and preventing equipment damage.
Implementation Method 1
an electromagnetic coil for capturing metallic debris that has been dislodged by the brush assembly
Implementation Method 2
multiple nozzles for jetting substances (for example, cleaning fluids) that can aid in a cleaning operation carried out at the well
Implementation Method 3
a brush assembly for agitating the debris along the wall
Data Source
AI summary
A method of cleaning a well includes flowing well fluid within the well while running a cleaning tool into the well, injecting the well fluid with a fluid thickening agent through multiple nozzles of the well cleaning tool to form thickened well fluid, dislodging metallic debris and non-metallic debris accumulated along a wall of the well with multiple brushes of the cleaning tool, carrying the non-metallic debris out of the well with the thickened well fluid, and capturing the metallic debris at a capture device of the cleaning tool.