Insulated and pressure-preserved sample sampling device

Abstract

The present invention discloses a thermal insulation and pressure insulation original sample sampling apparatus, which comprises a box, a raw liquid assembly and a raw gas assembly, wherein the raw liquid assembly comprises a raw liquid tank, a raw liquid heating member, a raw liquid sensing module, a first raw liquid pipe and a second raw liquid pipe, the raw liquid tank is arranged in the box, the raw liquid heating member and the raw liquid sensing module are arrange on the raw liquid tank, the raw gas assembly comprises a raw gas tank, a raw gas heating member, a raw gas sensing module, a first raw gas pipe and a second raw gas pipe, the raw gas tank is arranged in the box, the raw gas heating member and the raw gas sensing module are arranged on the raw gas tank, one ends of the first raw gas pipe and the second raw gas pipe are communicated to the raw gas tank, the other end extends to the outer side of the box, and the first raw gas pipe is communicated to an increasing pump. According to the present invention, the thermal insulation and pressure insulation original sample sampling apparatus can provide the same internal environment as the sampling environment, such that the physical and chemical properties of the sample are not changed during the transportation process, and the accuracy of the final indoor corrosion evaluation result is ensured.

Description

technical field [0001] The invention relates to a sampling device, in particular to a heat preservation and pressure maintaining sample sampling device. Background technique [0002] For indoor corrosion evaluation, it is necessary to extract on-site samples (or simulate and configure experimental samples according to the test results of the samples), simulate the on-site working conditions, and carry out the corrosion evaluation work in accordance with the corresponding standards. The properties of samples extracted on site will directly affect the accuracy of indoor corrosion evaluation. At present, the on-site sample sampling mainly adopts the direct sampling method, which is to take the on-site sample into the container through the valve sample exposure and inflow method, and then transfer it after sealing. The disadvantages are: 1) There is a certain amount of air circulation in the sampling process, which leads to the inflow of oxygen and the inflow / precipitation of c...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1) There is a certain amount of air circulation in the sampling process, which leads to the inflow of oxygen and the inflow / precipitation of carbon dioxide, and also brings a certain amount of temperature and pressure loss; 2) Due to the long transfer period, the sampling equipment It does not have the function of heat preservation, and the sample temperature will be lost again.

Since the on-site samples come from deep oil reservoirs, in high temperature and high pressure environments, the medium contains a certain amount of carbon dioxide, hydrogen sulfide, ferrous ions, etc., this sampling method will bring the following effects: 1) The loss of temperature and pressure will lead to the loss of carbon dioxide 1. The overflow of hydrogen sulfide gas changes the composition of the components, and at the same time reduces the pH value of the medium and changes the medium environment; 2) The exposure of the sample during the sampling process will increase the oxygen content of the medium, resulting in changes in the content of ferrous ions, etc., changing the medium Its corrosion mechanism and corrosion morphology will also change accordingly.

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