Sampling system for carrying out field sampling in oil field, method and application thereof

An on-site sampling and oilfield technology, which is applied in the direction of sampling devices, earthwork drilling, wellbore/well components, etc., to achieve the effect of accurate experimental process, improved detection accuracy, and reduced storage time

Active Publication Date: 2014-11-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is especially more accurate for the experimental results of studying the composition changes of high hydrogen sulfide-containing gases

Method used

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  • Sampling system for carrying out field sampling in oil field, method and application thereof
  • Sampling system for carrying out field sampling in oil field, method and application thereof
  • Sampling system for carrying out field sampling in oil field, method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] A sampling device, the device includes a sampling valve 12, a sampling bottle 11 and a pressure reducing valve,

[0048] Both ends of the sampling bottle 11 are threadedly connected with the sampling valve 12, and the external connection of the sampling valve 12 is an external threaded sleeve type connection; the pressure reducing valve is used to depressurize the high-pressure gas in the sampling bottle. Sampling; the pressure reducing valve includes an external injection injection port 13, which is connected to an external detector; the external injection injection port 13 is a card sleeve type connection port to eliminate dead ends of the pipeline.

[0049] In order to reduce the problem of excessive pressure in the sampling bottle 11, the pressure reducing valve includes a safety valve structure that includes a safety valve 6, a gas circuit 14 and an acid gas neutralization tank 15; when the regulating pressure exceeds the allowable value When 4 MPa or the pressure reduc...

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PUM

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Abstract

The invention belongs to the field of development of oil and gas wells, and relates to a wellhead sampling device, in particular to a wellhead sampler designed for the characteristic of gas field environment containing high content of H2S / CO2, and a sampling system thereof. The sampling device comprises a sampling valve, a sampling bottle and a pressure reducing valve, wherein two ends of the sampling bottle are in threaded connection with the sampling valve; the external connection of the sampling valve is external-thread clamping sleeve type connection; the pressure reducing valve is used for carrying out pressure reduction and sample injection on high-pressure gas in the sampling bottle; the pressure reducing valve comprises an outer conveying sample injection port which is connected with an outer detector; and the outer conveying sample injection port is a clamping sleeve type connection port so as to eliminate dead angles of pipelines. In the invention, the field sampling for analysis is achieved, the result of experimental analysis has good consistency, the device is safe and reliable, and the corrosion resistance to H2S / CO2 is strong. In the gas field sampler disclosed by the invention, the sampling process is safer, the experimental process is more precise and faster, the applicable pressure range is wider, and more safety is achieved.

Description

Technical field [0001] The invention belongs to a wellhead sampling device in the field of oil and gas well development, and in particular relates to a wellhead sampling device for high H 2 S / CO 2 Wellhead sampler and its sampling system designed for the characteristics of gas field environment. Background technique [0002] High H content in oil and gas fields 2 S / CO 2 The gas is highly toxic and corrosive, posing a great threat to production and people's lives. Correctly measure H in gas wells on site 2 S and CO 2 Concentration is of great significance for corrosion protection in the production process, and it is also particularly important for the reasonable selection of pipe materials. [0003] In the prior art, the sampler is used for high H content 2 S / CO 2 The following problems exist in gas sampling: [0004] 1) The material of the parts is easy to be high in H 2 S / CO 2 Gas corrosion [0005] 2) In the past, the gas sampling process has a small diameter and a too long connect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/08G01N1/22
Inventor 李孟涛石在虹史爱萍杨立红苏建政王雅茹唐萍
Owner CHINA PETROLEUM & CHEM CORP
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