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Apparatus for sampling

A sampling port and sample technology, applied in the field of oil and gas geochemical exploration, can solve the problems of loose sampling port cover, difficult to reach, not easy to stack, etc., to improve analysis efficiency and analysis accuracy, facilitate production and manufacture, Avoid the effect of loose air leakage

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sampling port protrudes from the bottle cap, so it is not easy to stack and bump during transportation, which will cause the sampling port cap to loosen and leak air.
At the same time, after clay samples, seabed silt and high-salt samples are loaded into sampling bottles, agglomeration and agglomeration will occur in saturated brine, resulting in the light hydrocarbons in the agglomerated samples being difficult to volatilize into the headspace of the sampling bottle, and it is difficult to achieve "gas , Liquid (solid) phase equilibrium", which makes the analysis efficiency low and the analysis accuracy low

Method used

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Examples

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Effect test

Embodiment 1

[0034] Example 1—Sampling, preservation and analysis of light hydrocarbons in the headspace of clay samples: Take clay samples, crush them to a particle size below 0.5 cm, open the container cover 2, and quickly fill it with 1-3 stirring units 6 Add supersaturated sodium chloride solution to container 1 with a scale of 100mL, and leave 50mL space, immediately cover the container lid 2 and seal it, take it back to the laboratory and place it on a shaker for 10-30min after shaking, the clay sample in container 1 does not appear Report the agglomeration phenomenon, and reach the gas-liquid (solid) phase balance of light hydrocarbons in the headspace, open the sampling port protection cover 5, take a certain volume of headspace gas from the sampling port 3 with a micro sampler, and analyze it with a gas chromatograph For the content of light hydrocarbons in the headspace, after the sample was left to stand for 72 hours, a certain volume of headspace gas was taken from the micro-sam...

Embodiment 2

[0035] Example 2—Sampling preservation and analysis method of solid-phase microextraction technology for clay samples: take clay samples, crush them to a particle size below 0.5cm, open the container lid 2, and quickly fill them with 1-3 stirring units in advance 6 and the supersaturated sodium chloride solution to the 100mL scale container 1, the remaining 50mL space, immediately cover the container lid 2 and seal it, take it back to the laboratory and put it on the shaker for 10-30min, the clay sample in the container 1 is not If there is agglomerate phenomenon, open the protective cover 5 of the sampling port, use the solid-phase microextraction extraction head to concentrate and enrich the hydrocarbons from the sampling port 3 for 30-60 minutes, and then analyze and extract the C5-C15 carbon number hydrocarbons with a gas chromatograph class content.

Embodiment 3

[0036]Example 3—Sampling, preservation and analysis of light hydrocarbons in the headspace of high-salt samples: Take a high-salt sample, crush it to a particle size below 0.5 cm, open the container cover 2, and quickly fill it with 1-3 Put a stirring unit 6 and supersaturated sodium chloride solution into container 1 with a scale of 100mL, leave 50mL space, immediately cover the container cover 2, take it back to the laboratory and put it on the shaker for 10-30min. The saline sample did not report agglomeration, and reached the gas-liquid (solid) phase equilibrium of light hydrocarbons in the headspace. Open the sampling port protection cover 5, and take a certain volume of headspace gas from the sampling port 3 with a micro sampler. Use a gas chromatograph to analyze the content of light hydrocarbons in the headspace. After the sample is left to stand for 72 hours, take a certain volume of headspace gas with a micro-sampler again to analyze the content of light hydrocarbons ...

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Abstract

The present invention provides an apparatus for sampling, wherein the apparatus comprises a container for storing a sample, a container cover arranged on the container, provided with at least a sampling port and connected with the container in a sealing mode, a sampling port sealing cover provided with a through-hole and connected with the sampling port in the sealing mode, and a sampling port protection cover arranged at the end of the sampling port of the container, wherein, a first sealing gasket capable of sealing the through hole is arranged between the sampling port and the sampling port sealing cover, and the sampling port and the sampling port sealing cover are arranged in a cavity formed between the sampling port protection cover and the container. The apparatus for sampling also comprises at least a stirring unit arranged in the container and used for stirring the sample. The apparatus for sampling realizes the protection of the sampling port and the sampling port sealing cover by the sampling port sealing cover, agglomeration problem of the sample in saturated brine can be solved through the stirring unit, so that analysis efficiency and precision of light hydrocarbon determination of top space in the container can be improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas geochemical exploration, in particular to a sampling device for sampling exploration samples. Background technique [0002] With the continuous deepening of oil and gas geochemical exploration research, the detection accuracy of direct oil and gas information indicators such as hydrocarbons is becoming more and more stringent, so the quality requirements for samples collected in the field are also getting higher and higher. In order to facilitate the collection and transportation of field samples , to realize the preservation and fidelity preservation of samples, and to ensure the original authenticity and representativeness of samples, it is particularly important to develop sample sampling bottles suitable for oil and gas geochemical exploration. [0003] CN102478463A provides a sealed sampling bottle, although it has the advantages of being applicable to the storage of different types of ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/02
Inventor 李广之孙长青胡斌毕文涛
Owner CHINA PETROLEUM & CHEM CORP