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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  • 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 and failure
The permanent magnet method is a monitoring method that uses a permanent magnet as a magnetic source to judge the status of the pig through the pipeline by detecting the fluctuation of the magnetic field. Long-distance ball monitoring, and this method fails to solve the problem of pig jamming and positioning after the pig is stuck

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

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Embodiment 1

[0033] Such as figure 1 As shown, a buried pipeline 2 is provided under the soil 1, and a pig 3 is arranged in the buried pipeline 2. During the working process of the pig 3, six cylindrical aluminum-iron-boron pipes with a length of 12 cm and a diameter of 5 cm Strong magnetic permanent magnet (the surface magnetic induction is greater than 1.5T), such as figure 2 As shown, the magnetic source 4 of the radial permanent magnet group is fixed and arranged radially in the metal aluminum disc. The magnetic source is installed at the tail end of the pig 3 and advances with the pig; the weak magnetic detector 6 uses a single-axis fluxgate The sensor is used as a magnetic field detection probe, and the magnetic field weakening detector 6 is fixed in a plastic sleeve and buried in the surface soil 1. The magnetic field sensitive direction of the sensor is parallel to the direction of the magnetic force line when the magnetic field is the largest when the pig 3 passes through; the di...

Embodiment 2

[0038]A buried oil and gas transmission pipeline pig magnetic abnormal ball monitoring and jamming positioning method, the magnetic field weakening detector array is: after the pig is jammed, the single-axis magnetic flux used for ball ball detection is collected The gate weak magnetic detector is installed on the magnetic anomaly detection bracket to form a detection array, which is used for the detection of magnetic anomalies above the pig.

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

[0040] The invention installs a disk magnetic source composed of permanent magnet radial arrangement at the rear end of the pig, and uses a single-axis fluxgate weak magnetic dete...

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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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