Magnetic Freepoint Indicator Tool for Stuck Pipe Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During downhole drilling operations, identifying the sticking point of a drill string is challenging, leading to inefficient and costly recovery processes, as existing methods are slow and inaccurate, often resulting in leaving significant portions of the pipe in the formation.
Innovation Solution
A magnetic freepoint indicator tool (MFIT) is deployed, utilizing a combination of permanent magnets and pulsed coils to write magnetic signatures along the pipe, allowing sensors to measure magnetic flux changes and determine the stuck point by comparing pre- and post-force application flux data, leveraging magnetostriction principles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to determine the sticking point, then the process is simple to operate, but the identification accuracy is low and time-consuming
Solution Approach 1:
The magnetic signature is written on the pipe before the sticking point identification process begins. This preliminary magnetic marking allows for rapid comparison later to determine the sticking point location, eliminating the need for slow conventional trial-and-error methods and enabling quick, accurate identification.
Solution Approach 2:
The patent replaces conventional mechanical or trial-based sticking point detection methods with a magnetic field-based system. By using magnetic signatures and magnetic flux measurements, the system achieves rapid and accurate sticking point identification without the time-consuming mechanical probing or multiple test runs of traditional approaches.
2Measurement precision
If multiple runs are conducted to determine the sticking point, then the identification may be more accurate, but the operational cost increases significantly
Solution Approach 1:
The magnetic signature is written once on the pipe before deployment. This single preliminary action eliminates the need for multiple costly trial runs to determine the sticking point, as the magnetic marker provides a permanent reference that enables accurate identification in a single operation, significantly reducing operational costs.
Solution Approach 2:
The magnetic signature creates a copy or imprint of the pipe's magnetic state at a known good position. This magnetic copy serves as a reference that can be compared against the current state to identify the sticking point, eliminating the need for multiple physical test runs and reducing energy consumption and operational costs.
3Loss of substance
If conventional methods leave large portions of pipe in the formation, then the pipe can be preserved for future use, but the drilling operations are significantly hindered
Solution Approach 1:
The magnetic field-based detection system replaces slow conventional methods, enabling rapid and precise sticking point identification. This allows operators to accurately determine how much pipe can be safely recovered, maximizing pipe recovery while avoiding formation damage, thus preserving both productivity and pipe resources.
Solution Approach 2:
The system provides immediate feedback by comparing the magnetic signature with current magnetic flux measurements. This real-time feedback enables operators to quickly determine the sticking point location and make informed decisions about pipe recovery, preventing unnecessary loss of drilling time and maintaining high productivity while maximizing pipe salvage.
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 MFIT enables rapid and accurate identification of stuck points, allowing for efficient pipe recovery by differentiating between free and stuck sections, thereby reducing operational costs and preserving pipe resources.
Implementation Method 1
The first magnetic source and the second magnetic source have a different magnetic field source
Implementation Method 2
the sensor array measuring magnetic flux data
Implementation Method 3
leveraging magnetostriction principles
Data Source
AI summary
A system for determining a stuck point of a pipe positioned within a wellbore includes a tubular housing and a sensor array positioned within the tubular housing, the sensor array arranged at a first end. The system also includes a first magnetic source positioned within the tubular housing, the first magnetic source arranged at a second end. The system further includes a second magnetic source positioned within the tubular housing, the second magnetic source arranged between the sensor array and the second end. The first magnetic source and the second magnetic source have a different magnetic field source.