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Online evaluation device and evaluation method for mountainous area gas collecting pipeline corrosion inhibitor coating effect

A technology for gas-gathering pipelines and evaluation devices, which is applied to measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc., and can solve the problem that the corrosion inhibitor coating film effect of gas-gathering pipelines in mountainous areas cannot be regularly evaluated, and corrosion inhibitors cannot be evaluated Concentration distribution, effective migration distance of corrosion inhibitor, adjustment of corrosion inhibitor operation plan, etc.

Active Publication Date: 2020-12-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an online evaluation device and evaluation method for the coating effect of corrosion inhibitors in gas-gathering pipelines in mountainous areas. On-site corrosion situation, timely adjustment of corrosion inhibitor operation plan
And the problem that the concentration distribution of the corrosion inhibitor in the entire circumference of the pipeline (top, middle, and bottom) and the effective migration distance of the corrosion inhibitor cannot be evaluated

Method used

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  • Online evaluation device and evaluation method for mountainous area gas collecting pipeline corrosion inhibitor coating effect
  • Online evaluation device and evaluation method for mountainous area gas collecting pipeline corrosion inhibitor coating effect
  • Online evaluation device and evaluation method for mountainous area gas collecting pipeline corrosion inhibitor coating effect

Examples

Experimental program
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Effect test

Embodiment 1

[0040] An online evaluation device for the coating effect of corrosion inhibitors for gas-gathering pipelines in mountainous areas, such as figure 1 As shown, it includes a serving tube (4), an uphill elbow front pipeline (8), a mountainous uphill pipeline (9), a mountainous downhill pipeline (10), a downhill elbow rear pipeline (11), a ball receiving cylinder ( 5), purge valve, vent valve, sewage valve, sewage buffer tank (53); the pipeline (8) before the uphill elbow is provided with a 1# monitoring pipe section (28) and a bypass pipeline is provided at the corresponding position, The mountainous uphill pipeline (9) is provided with a 2# monitoring pipe section (49) and a bypass pipeline at the corresponding position, and the mountainous downhill pipeline (10) is provided with a 3# monitoring pipe section (50) and a bypass pipeline is provided at the corresponding position Pipeline, after the downhill bend, the pipeline (11) is provided with a 4# monitoring pipe section (51)...

Embodiment 2

[0058] An online evaluation device for the coating effect of corrosion inhibitors in gas-gathering pipelines in mountainous areas is basically the same as in Example 1, except that 1# monitoring pipe section (28), 2# monitoring pipe section (49), and 3# monitoring pipe section The internal diameter d of the first half of the pipe section (50) and the 4# monitoring pipe section (51) 1 is 311.1mm, and the inner diameter of the second half is d 2 It is 317.5mm, and the inner diameter difference between the two is equal to the wall thickness δ of the cage test piece fixture (31) and is 6.4mm. The test piece clamp (24) is seamlessly inserted into the second half of the monitoring pipe section. A resistance probe (29) is arranged on the top of the first half of the monitoring pipe section (28), and the monitoring surface of the resistance probe (29) is flush with the inner wall of the pipe.

[0059] The two ends of the cage-shaped test piece fixture (31) are provided with a left g...

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Abstract

The invention discloses an online evaluation device and evaluation method for a mountainous area gas collecting pipeline corrosion inhibitor coating effect. The online evaluation device comprises a ball serving station ball serving barrel, an uphill bent pipe front pipeline, a mountainous area uphill pipeline, a mountainous area downhill pipeline, a downhill bent pipe rear pipeline, a ball collecting station ball collecting barrel, a purging valve, an emptying valve, a blow-down valve and a sewage buffer tank. Monitoring pipe sections are installed at four characteristic positions of a pipeline in an inter-station mountainous area, planar probes are arranged at the front half sections of the monitoring pipe sections, cage-shaped corrosion test piece clamps are embedded into the rear half sections of the monitoring pipe sections, and grooves in the clamps can circumferentially clamp experiment test pieces. According to the method, the running condition and the coating effect of the corrosion inhibitor of the gas collecting pipeline in the mountainous area are monitored in real time and periodically evaluated, and the concentration distribution condition of the corrosion inhibitor inthe whole circumferential direction (top, middle and bottom) of the pipeline and the effective migration distance of the corrosion inhibitor are analyzed. Therefore, a corrosion inhibitor adding scheme is formulated in a targeted manner, and the corrosion inhibitor utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of pipeline internal corrosion testing and monitoring, in particular to an online evaluation device and evaluation method for the coating effect of a corrosion inhibitor in a gas-gathering pipeline in a mountainous area. Background technique [0002] The gas field adopts the internal anti-corrosion technology of continuous injection of corrosion inhibitor at the station and batch treatment of coating film with corrosion inhibitor outside the station. Usually, the concentration distribution of the corrosion inhibitor on the metal surface is uniform to give full play to the anti-corrosion effect of the corrosion inhibitor, and the corrosion inhibitor coated on the inner wall of the pipeline is due to the action of gravity, causing the concentration of the corrosion inhibitor at the bottom of the pipeline to be greater than that at the top of the pipeline. Uneven concentration distribution in the pipeline. As ...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 曾德智高搏于晓雨张思松孙天礼黄仕林张诚陈文袁曦
Owner SOUTHWEST PETROLEUM UNIV
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