Magnetic anomaly pigging monitoring and blocking positioning method for buried oil and gas transmission pipeline cleaner

A technology for conveying pipelines and positioning methods, which is applied in chemical instruments and methods, cleaning methods and utensils, and the size/direction of magnetic fields, etc., can solve the problem of failure to realize the monitoring of buried pipelines through balls, and failure to solve the problem of pig blocking and positioning. , increase the cost of monitoring equipment and other issues, to avoid affecting the health of employees, to achieve remote monitoring and control, and low cost of use

Active Publication Date: 2017-03-15
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain defects in the current electromagnetic transmitters, mainly because the power of the transmitter is small, and it is easily disturbed by the surrounding environment (high-voltage lines, high-speed rail, etc.); This signal source not only increases the cost of monitoring equipment but also is prone to malfunction a

Method used

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  • Magnetic anomaly pigging monitoring and blocking positioning method for buried oil and gas transmission pipeline cleaner
  • Magnetic anomaly pigging monitoring and blocking positioning method for buried oil and gas transmission pipeline cleaner
  • Magnetic anomaly pigging monitoring and blocking positioning method for buried oil and gas transmission pipeline cleaner

Examples

Experimental program
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Example Embodiment

[0032] Example 1

[0033] Such as figure 1 As shown, a buried transmission pipeline 2 is provided under the soil 1, and a pipe pig 3 is installed in the buried transmission pipeline 2. During the operation of the pipe pig 3, there are 6 cylindrical aluminum iron boron with a length of 12 cm and a diameter of 5 cm. Strong magnetic permanent magnet (surface magnetic induction intensity is greater than 1.5T), such as figure 2 The magnetic source 4 of the radial permanent magnet group is arranged in a radially fixed arrangement in a metal aluminum disc. The magnetic source is installed at the tail end of the pig 3 and moves forward with the pig; the weak magnetic detector 6 uses a single-axis flux gate The sensor is used as a magnetic field detection probe, and the weak magnetic detector 6 is fixed in a plastic sleeve and buried in the surface soil 1. The sensor's magnetic field sensitivity direction is parallel to the direction of the magnetic field line when the magnetic field is m...

Example Embodiment

[0037] Example 2

[0038] A method for monitoring and blocking the magnetic abnormal flux ball of a buried oil and gas pipeline pig. The weak magnetic detector array is to collect uniaxial magnetic flux for ball passing detection after the pig is blocked. The door weak magnetic detector is installed on the magnetic anomaly detection bracket to form a detection array for magnetic anomaly detection above the pig.

[0039] In this embodiment, the single-axis fluxgate weak-magnetic detector used for ball-through detection is directly collected and installed on the magnetic anomaly detection bracket to form a detection array, so that the single-axis fluxgate weak-magnetic detector can be reused and reduce the cost of the instrument. Preparation costs.

[0040] The invention installs a disk magnetic source composed of a radial arrangement of permanent magnets at the rear end of the pig. After the pig is launched, a single-axis fluxgate weak magnetic detector installed on the ground is use...

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Abstract

The invention belongs to the field of oil and gas transmission pipeline cleaning, and particularly relates to a pigging working condition monitoring and blocking accurate positioning method for a buried oil and gas transmission pipeline cleaner, based on single shaft magnetic-flux-gate magnetic anomaly detection. The implementation method includes arranging a permanent magnet set on the cleaner; using weak field detectors arranged on an earth surface to monitor magnetic field fluctuation so as to determine whether or not the cleaner can normally pass; and using a weak field detector array to search and positioning a position of the cleaner along a blocked segment of a pipeline while the cleaner is blocked, and directing the excavation. The pigging monitoring and blocking positioning implementation method is easy to operate, is low in use cost, can effectively avoid environment pollution and influence on worker health, is rapid and accurate in positioning, and is remarkable in economic benefit.

Description

technical field [0001] The invention belongs to the field of cleaning oil and gas transmission pipelines, and in particular relates to a magnetic anomaly flux ball monitoring and jamming positioning method for buried oil and gas transmission pipeline pigs based on single-axis fluxgate magnetic anomaly detection. Background technique [0002] During the long-term oil and gas transmission process, large-scale buried oil and gas transmission pipelines will accumulate wax, rust to form polymers, and form hydrates, which will affect normal oil and gas transmission. Therefore, the pipeline must be cleaned regularly. The pigs currently used are generally propelled by gas, have a high forward speed, and are difficult to monitor the pigging conditions. At present, there are mainly radioactive isotope methods, pressure difference methods, mechanical methods, acoustic methods, magnetic pulse signal emission methods and permanent magnet methods in the aspects of pig ball monitoring and ...

Claims

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Application Information

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IPC IPC(8): F16L55/24G01R33/02B08B13/00
CPCB08B13/00F16L55/24G01R33/02
Inventor 郭智勇陈卓梁海波石明江张禾孙语崎于晓婕
Owner SOUTHWEST PETROLEUM UNIV
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