EM Wave Drift Tool for Accurate OCTG Internal Diameter Measurement
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Solution Overview
Problem
The existing methods for determining the internal tube capacity of Oil Country Tubular Goods (OCTG) products are inaccurate due to manufacturing tolerances, leading to operational complications, high costs, and potential failures in the oil industry.
Innovation Solution
A measuring device equipped with electromagnetic (EM) emitters and receivers that emit and receive EM waves to analyze the internal diameter of tubes, allowing for precise calculation of the internal diameter and fluid flow capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tabulated nominal internal diameter is used for calculation, then the measurement process is simple, but the measurement precision is insufficient due to manufacturing tolerances
Solution Approach 1:
The patent replaces mechanical measurement systems with electromagnetic wave-based measurement. EM emitters transmit electromagnetic waves through the tube, and EM receivers detect the waves to calculate internal diameter, eliminating the need for complex mechanical contact measurement devices while achieving high precision
Solution Approach 2:
The drift tool is designed to perform multiple functions: verifying roundness of the tube and measuring internal diameter using EM waves. This multi-functional approach reduces the need for separate measurement devices, simplifying the overall measurement system while maintaining high precision
2Measurement precision
If standard drift tools are used for pipe drifting, then the roundness verification is achieved, but the internal capacity measurement remains inaccurate
Solution Approach 1:
The system uses EM receivers to detect reflected electromagnetic waves from the tube's internal surface. The reflected wave parameters provide feedback information about the internal diameter, enabling accurate calculation of internal capacity while maintaining roundness verification functionality
Solution Approach 2:
The patent changes the measurement parameter from tabulated nominal diameter to actual measured internal diameter based on EM wave reflection characteristics. By analyzing the reflected EM wave parameters (such as time of flight, frequency shift), the system calculates the precise internal diameter, thereby accurately determining internal capacity
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
This solution provides accurate measurements of internal diameters and fluid flow capacities, reducing operational complications and costs, and preventing potential failures by combining pipe roundness verification and internal diameter measurement in a single process.
Implementation Method 1
a first electromagnetic (EM) emitter disposed on the drift tool and configured to emit EM waves while the drift tool drifts inside the tube, and an EM receiver disposed on the drift tool and configured to receive the EM waves reflected from an internal surface of the tube
Data Source
AI summary
A measuring device for a tube is disclosed. The measuring device includes a drift tool configured to verify roundness of the tube, a first electromagnetic (EM) emitter disposed on the drift tool and configured to emit EM waves while the drift tool drifts inside the tube, and an EM receiver disposed on the drift tool and configured to receive the EM waves reflected from an internal surface of the tube, wherein parameters of the emitted and received EM waves are analyzed to compute an internal diameter of the tube.