An online evaluation device and evaluation method for the coating effect of corrosion inhibitors for gas-gathering pipelines in mountainous areas

A technology for gas gathering pipelines and evaluation devices, which is applied in measurement devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problem that the effect of corrosion inhibitor coating on gas gathering pipelines in mountainous areas cannot be regularly evaluated and the operation of corrosion inhibitors can be adjusted. Problems such as scheme, inability to evaluate the distribution of corrosion inhibitor concentration, effective migration distance of corrosion inhibitor, etc.

Active Publication Date: 2022-03-29
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • An online evaluation device and evaluation method for the coating effect of corrosion inhibitors for gas-gathering pipelines in mountainous areas
  • An online evaluation device and evaluation method for the coating effect of corrosion inhibitors for gas-gathering pipelines in mountainous areas
  • An online evaluation device and evaluation method for the coating effect of corrosion inhibitors for gas-gathering pipelines in mountainous areas

Examples

Experimental program
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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 the coating effect of corrosion inhibitors on gas-gathering pipelines in mountainous areas, including: a serving cylinder at a serving station, a pipeline in front of an uphill bend, an uphill pipeline in a mountainous area, and a downhill pipeline in a mountainous area , The pipeline after the downhill bend, the ball collection tube at the ball collection station, the purge valve, the vent valve, the sewage valve, and the sewage buffer tank. Install monitoring pipe sections at four characteristic positions of the inter-station mountainous pipeline. Planar probes are installed in the first half of the monitoring pipe section, and cage-shaped corrosion test piece fixtures are embedded in the second half. The invention not only monitors and regularly evaluates the operation of corrosion inhibitors and coating effects of gas-gathering pipelines in mountainous areas in real time, but also analyzes the concentration distribution of corrosion inhibitors in the entire circumference of the pipeline (top, middle, and bottom) and the effective migration distance of corrosion inhibitors. In this way, the corrosion inhibitor addition plan can be formulated in a targeted manner to improve the utilization rate of the corrosion inhibitor.

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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Patent Type & Authority Patents(China)
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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