A device and method for removing liquid accumulation in low-lying parts of pipelines and on-line monitoring of corrosion inhibitor concentration

A technology for monitoring devices and corrosion inhibitors, which is applied in the field of liquid removal in low-lying areas of pipelines and on-line monitoring devices for corrosion inhibitor concentration, which can solve problems such as hydrate slug flow corrosion and unsafety, so as to slow down corrosion and reduce the risk of formation Effect

Inactive Publication Date: 2017-09-29
SOUTHWEST PETROLEUM UNIV
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  • Description
  • Claims
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Problems solved by technology

[0003] The high-sulfur gas field adopts the wet gas gathering and transportation process, which may face the risk of hydrate formation, slug flow formation, corrosion, and induce unsafe factors, and there are corresponding technical problems that need to be solved

Method used

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  • A device and method for removing liquid accumulation in low-lying parts of pipelines and on-line monitoring of corrosion inhibitor concentration
  • A device and method for removing liquid accumulation in low-lying parts of pipelines and on-line monitoring of corrosion inhibitor concentration
  • A device and method for removing liquid accumulation in low-lying parts of pipelines and on-line monitoring of corrosion inhibitor concentration

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Embodiment

[0039] In this embodiment, the online monitoring of upstream slug flow is a non-invasive safety monitoring means. When the flow pattern of the fluid in the pipeline is slug flow, due to the high density of the liquid slug and the large mass per unit volume, the corresponding natural frequency f of the pipeline structure is lower than that of other flow patterns when the fluid passes through the pipeline. When the liquid slug passes through the monitoring area, the fluid density in the monitoring area increases rapidly, and the liquid slug density can be obtained by calculating the natural frequency of the pipeline structure. The natural frequency f of the pipeline structure is calculated by formula 1. From the above formula, it can be concluded that the natural frequency is the result of the action of mass. m is the quality of the pipeline structure, k is the stiffness coefficient, and the quality m of the pipeline structure refers to the sum of the quality of the pipeline mat...

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Abstract

The invention relates to a device and method for removing liquid accumulation in low-lying parts of pipelines and monitoring the concentration of corrosion inhibitors online. The main spinning pipe in the device is connected with the wet natural gas gathering and transportation pipeline inside the acid gas field, and the main spinning pipe is equipped with a spiral flow riser. The cyclone makes the gas annulus in the main pipeline produce gas-liquid two-phase spiral flow and centrifugal separation effect to realize gas-liquid separation; set up a corrugated tube and a droplet catcher to avoid the gas-liquid two-phase flow from forming a slug in the device flow, which affects the separation effect; by measuring the conductivity, temperature and ultrasonic velocity of the effusion in the effusion collection bucket, based on the artificial neural network model, the concentration distribution curve of the corrosion inhibitor is formed to realize the monitoring function of the concentration of the corrosion inhibitor; the concentration of the corrosion inhibitor is constructed The data transmission system ensures that the data is transmitted to the station control room in real time, providing a basis for the optimization of the injection volume of the corrosion inhibitor; the design of the effusion lifting pipeline uses the high-pressure natural gas in the gathering pipeline to lift the effusion in the effusion buffer tank, The effusion enters the ground storage tank and is loaded and transported for disposal.

Description

technical field [0001] The invention relates to a device and method for removing fluid accumulation in low-lying areas of pipelines and on-line monitoring of corrosion inhibitor concentration, and belongs to the technical field of oil and gas ground gathering and transportation. Background technique [0002] In terms of liquid removal and online monitoring of corrosion inhibitor concentration in low-lying areas of wet gas gathering and transportation systems in high-sulfur gas fields, foreign researchers have not proposed relevant design schemes or online monitoring methods for liquid removal and online monitoring of corrosion inhibitor concentration in open literature , most domestic researchers stay in the stage of theoretical research, and there is no report on the relevant tangible research results. [0003] The high-sulfur gas field adopts the wet gas gathering and transportation process, which may face the risk of hydrate formation, slug flow formation, corrosion, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 刘武邹宇谷雪琴钟煜
Owner SOUTHWEST PETROLEUM UNIV
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