CN102901658A - Device and method for extracting rare gases from crude oil and stratum water - Google Patents
Device and method for extracting rare gases from crude oil and stratum water Download PDFInfo
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- CN102901658A CN102901658A CN2012103831510A CN201210383151A CN102901658A CN 102901658 A CN102901658 A CN 102901658A CN 2012103831510 A CN2012103831510 A CN 2012103831510A CN 201210383151 A CN201210383151 A CN 201210383151A CN 102901658 A CN102901658 A CN 102901658A
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Abstract
The invention discloses a device for extracting rare gases from crude oil and stratum water. The device comprises an air exhaust pipeline; one end of the air exhaust pipeline is connected with a mechanical pump through a first loop and a second loop which are connected in parallel; the other end of the air exhaust pipeline is orderly and tightly connected with a sampling bottle and a sample bottle which are mutually connected in series; a sealing valve is respectively arranged at two ends of the sampling bottle and the sample bottle; a crude oil or stratum water sample is arranged inside the sample bottle; a first vacuum valve, a molecular pump, a corrugated pipe sealing valve and a resistance gauge are orderly arranged inside the first loop from the air exhaust pipeline to the mechanical pump, and a second vacuum valve is arranged inside the second loop. According to the device for extracting the rare gases from the crude oil and the stratum water, the rare gases in the crude oil and the stratum water are effectively extracted; the sampling problem of rare gas analysis of the samples in the crude oil and the stratum water and the atmospheric pollution problem in preparation process of the rare gases are solved, and technical support and guarantee are provided for the reliability and the accuracy of rare gas components in subsequent crude oil and stratum water, and isobar analysis data.
Description
Technical field
The invention relates in the experiment of the oil-gas geology in oil-gas exploration geology field and oil-gas-source comparative study, a kind of sample preparation device and method for the preparation of rare gas relate in particular to extraction element and the method for rare gas in a kind of crude oil, the local water.Background technology
Rare gas (claiming again inert gas) becomes the important tracer agent of geology course because of its unique chemical inertness.In oil-gas exploration, rare gas component and isotope are containing abundant oil-gas geology information in the liquid geological sample such as crude oil, local water, by with its with the hydrocarbon source rock that may originate in the rare gas relevant information compare, declare the contrast of knowledge, oil-gas-source and Hydrocarbon Formation Reservoirs phase etc. for the origin cause of formation of carrying out oil gas and all have important spike indicative function, be conducive to abundant and improve existing take carbon, hydrogen isotope, lighter hydrocarbons, biomarker etc. as main Gas Source Correlation index system.And the preparation link of the extraction of rare gas, purifying, enrichment is prerequisite and the necessary guarantee of carrying out follow-up rare gas component and isotope analysis in the crude oil, local water, is to obtain the accurate analysis data to carry out the oil gas origin cause of formation and declare and know and key that oil-gas-source contrasts.
Because the rare gas abundance is extremely low in the geological samples such as crude oil, local water, and be subject to easily the pollution of rare gas in the atmosphere, therefore, carry out the extraction link of rare gas in the sample and analyze most important for carrying out rare gas.But because the singularity of the fluid samples such as crude oil, local water, the pre-treatment that rare gas in the sample is extracted need to solve two large technical barriers: at first, usually can adopt high voltage bearing steel cylinder to carry out the well site high-pressure sampling for rock gas, for the pollution of avoiding atmosphere in the sampling process needs steel cylinder is shifted to an earlier date forvacuum, sampling process need to utilize rock gas that steel cylinder is washed 4～6 times repeatedly, is taken a sample in the stage casing of continuous flow at last; And for crude oil, local water, because the difference of phase has determined that sampling container and sampling mode also have very big-difference, therefore, how to guarantee that it is one of link of most important, most critical that crude oil or local water sampling process are not polluted by rare gas in the atmosphere; Secondly, because the content of rare gas is extremely low in crude oil, the local water, adopt the rare gas in which kind of method ability extraction, enrichment, purifying crude oil, the local water sample, and guarantee that it is another gordian technique difficult problem of rare gas preparation in the restriction crude oil that sample is not polluted by ambient atmosphere.The existence of above-mentioned technical matters has important impact to the preparation effect of rare gas in crude oil, the local water and subsequent analysis result's reliability and accuracy.
Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes extraction element and the method for rare gas in a kind of crude oil, the local water, to overcome the defective of prior art.
Summary of the invention
The object of the present invention is to provide extraction element and the method for rare gas in a kind of crude oil, the local water, to solve the problem of avoiding atmospheric pollution in crude oil, local water sampling and the rare gas preparation process thereof, can extract efficiently rare gas in crude oil, the local water, satisfy and carry out rare gas component and the isotope analysis requirement of high precision, high accuracy.
The object of the present invention is achieved like this, the extraction element of rare gas in a kind of crude oil, the local water, and described extraction element comprises an exhaust pipe, described exhaust pipe one end is connected with a mechanical pump with second servo loop by the first loop in parallel; The described exhaust pipe other end sequentially is sealedly connected with sampling jar and the sample bottle of mutual series connection, and described sampling jar and sample bottle two ends respectively are provided with respectively seal valve; Crude oil or local water sample are housed in the sample bottle; Be provided with successively the first vacuum valve, molecular pump, sylphon seal valve and Pirani gauge by exhaust pipe to mechanical pump in described the first loop; Be provided with the second vacuum valve in the described second servo loop.
In a preferred embodiments of the present invention, described extraction element also comprises a box-shaped rack, described box-shaped rack by top board, base plate and all around panel consist of, front panel is control panel; The box-shaped rack bottom is provided with four support rollers; Described mechanical pump is fixedly installed on the framework soleplate; Described molecular pump is fixed in the top board downside of frame by pivot flange.
In a preferred embodiments of the present invention, be connected with ionization gauge on the described molecular pump; The import of molecular pump is connected with exhaust pipe by the first vacuum valve, and the first vacuum valve and exhaust pipe are arranged at the top board upside.
In a preferred embodiments of the present invention, the import of described mechanical pump is provided with one second threeway, the second threeway one end is connected with adsorption trap and one first threeway in turn, the first threeway one end is connected with described Pirani gauge, the first threeway other end is connected in the molecule delivery side of pump by the first corrugated tube, is provided with described sylphon seal valve in described the first corrugated tube.
In a preferred embodiments of the present invention, the described second threeway other end is connected in described the second vacuum valve by the second corrugated tube, is communicated in described exhaust pipe by the second vacuum valve; Described the second vacuum valve is arranged at the top board upside.
In a preferred embodiments of the present invention, the described exhaust pipe other end is tightly connected with sampling jar and the sample bottle of mutually connecting by a shoulder ring.
In a preferred embodiments of the present invention, described sampling jar and sample bottle are vial, and sampling jar and sample bottle are comprised of cavity and two ends glass valve body respectively.
Purpose of the present invention can also realize like this, the extracting method of rare gas in a kind of crude oil, the local water, and the extracting method of described rare gas may further comprise the steps:
1) before access sample bottle and sampling jar, to the startup of the extraction element of rare gas in crude oil, the local water and the first loop and second servo loop are vacuumized;
2) after access sample bottle and the sampling jar, exhaust pipe and sampling jar are vacuumized;
3) crude oil, local water fluid sample are carried out degassed processing, extract thus rare gas;
4) close the extraction element of rare gas in crude oil, the local water.
In a preferred embodiments of the present invention, in step 1) in comprise:
11) device for opening total power switch;
12) close the first vacuum valve and the second vacuum valve, open the sylphon seal valve between molecular pump and the mechanical pump, start mechanical pump the first loop and second servo loop are vacuumized;
13) treat that the demonstration of mechanical pump vacuum registration enters 10
-1Pa starts molecular pump the first loop and second servo loop is vacuumized.
In a preferred embodiments of the present invention, in step 2) in comprise:
The sample bottle that 21) crude oil, local water will be housed is with the sampling jar series connection of a sky, by sampling jar upper, sample bottle under position relationship with two bottle grafts enter the to bleed injection port of the pipeline other end;
22) open the seal valve at sampling jar two ends, be communicated with sampling jar cavity and two bottles of junctions, sample bottle and sampling jar junction and sampling jar cavity are vacuumized;
23) open mechanical pump and the second vacuum valve between the pipeline of bleeding, utilize mechanical pump to vacuumize;
24) when showing, the mechanical pump vacuum enters 10
-1Pa closes the second vacuum valve, opens the first vacuum valve of control molecular pump, and two bottles of junctions and sampling jar cavity are proceeded to vacuumize;
25) enter 10 when vacuum
-4During Pa, close up and down sealed at both ends valve of sampling jar, the first vacuum valve of closing control molecular pump.
In a preferred embodiments of the present invention, in step 3) in comprise:
31) unload the sampling jar of series connection and sample bottle and reversed upside down position, with sample bottle up, sampling jar down;
32) open sample bottle lower end seal valve and sampling jar upper end seal valve, sample liquids constantly flows into below sampling jar cavity and finally is full of below sampling jar, the gas that enrichment is deviate from the sample bottle of top;
33) close the seal valve of degassed sample bottle lower end of top, unload degassed sample bottle.
In a preferred embodiments of the present invention, in step 4) in comprise:
41) closure molecule pump;
42) close mechanical pump;
43) close at last the extraction element general supply.
From the above mentioned, the extraction element of rare gas and method in crude oil of the present invention, the local water, realized rare gas in crude oil, the local water is extracted efficiently, the problem of sampling of sample rare gas analysis in crude oil, the local water and the atmosphere polluting problem in the rare gas preparation process have been solved, for rare gas component in follow-up crude oil, the local water and isotope analysis the reliability of the data and accuracy provide technical support and assurance, it is all significant to declare knowledge, oil-gas-source contrast and Hydrocarbon Formation Reservoirs phase etc. for the origin cause of formation of carrying out oil gas.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein:
Fig. 1: be the main TV structure synoptic diagram of the extraction element of rare gas in crude oil of the present invention, the local water.
Fig. 2: be the side-looking structural representation of the extraction element of rare gas in crude oil of the present invention, the local water.
Fig. 3: be the structural principle synoptic diagram of the extraction element of rare gas in crude oil of the present invention, the local water.
Embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
Such as Fig. 1, Fig. 2 and shown in Figure 3, the present invention proposes the extraction element 100 of rare gas in a kind of crude oil, the local water, described extraction element 100 comprises an exhaust pipe 5, and described exhaust pipe 5 one ends are connected with a mechanical pump 11 with second servo loop by the first loop in parallel; Described exhaust pipe 5 other ends sequentially are sealedly connected with sampling jar 18 and the sample bottle 19 of mutual series connection, and described sampling jar 18 and sample bottle 19 two ends respectively are provided with respectively seal valve; Crude oil or local water sample are housed in the sample bottle 19; Be provided with successively the first vacuum valve 2, molecular pump 4, sylphon seal valve 6 and Pirani gauge 12 by exhaust pipe 5 to mechanical pump 11 in described the first loop; Be provided with the second vacuum valve 7 in the described second servo loop.
As shown in Figure 1 and Figure 2, in the present embodiment, described extraction element 100 also comprises a box-shaped rack 8, described box-shaped rack by top board, base plate and all around panel consist of, front panel is control panel; The box-shaped rack bottom is provided with four support rollers; Described mechanical pump 11 is fixedly installed on the framework soleplate; Described molecular pump 4 is fixed in the top board downside of frame by pivot flange 3.Be connected with ionization gauge 1 on the described molecular pump 4; The import of molecular pump 4 is connected with exhaust pipe 5 by the first vacuum valve 2, and the first vacuum valve 2 and exhaust pipe 5 all are arranged at frame top board upside.The pipeline 5 of bleeding is fixedly supported on the frame top board by pipeline fixed support block 16.
Further, as shown in Figure 1 and Figure 2, in the present embodiment, the import of described mechanical pump 11 is provided with one second threeway 13, the second threeway 13 1 ends upwards are connected with adsorption trap 10 and one first threeway 9 in turn, the first threeway 9 one ends are connected with described Pirani gauge 12, the first threeways 9 other ends and are connected in the outlet of molecular pump 4 by the first corrugated tube 14, are provided with described sylphon seal valve 6 in described the first corrugated tube 14.The exhausr port of mechanical pump 11 links to each other with an exhaust line 20.
Described the second threeway 13 other ends are connected in described the second vacuum valve 7 by the second corrugated tube 15, are communicated in described exhaust pipe 5 by the second vacuum valve 7; Described the second vacuum valve 7 also is arranged at frame top board upside.
In the present embodiment, described sampling jar 18 and sample bottle 19 are the identical vial of dimensions, and sampling jar 18 and sample bottle 19 are comprised of cavity and two ends glass valve body respectively; Sampling jar 18 is empty bottle, and sample bottle 19 is equipped with crude oil or local water sample; Sampling jar 18 can link to each other by plastic pipe with sample bottle 19.
Described exhaust pipe 5 other ends can be tightly connected with mutual sampling jar of connecting and sample bottle by conventional methods.
In another embodiment of present embodiment, described exhaust pipe 5 also can be tightly connected with sampling jar and the sample bottle of mutually connecting by a shoulder ring 17.Described shoulder ring 17 be one with the hollow cylinder body nut of nut screw thread, there is bayonet socket right cylinder nut lower end, and hollow cylinder card pad is arranged in the cylindrical nut, and the upper end of mat just is stuck in right cylinder nut lower end the bayonet socket place, is placed with the tygon packing ring on the hollow cylinder mat.During connection, hollow cylinder body nut with the outside screws out from pipeline 5 lower ends of bleeding first, take out hollow mat and packing ring, and hollow mat is put into the hollow cylinder body nut, sample bottle upper end glass interface is passed from hollow mat, and with gasket sleeve at the about 1～2cm of glass interface place, the sampling jar that then connects docks with the interface of bleeding, and outside hollow cylinder body nut screwed, then finish sample bottle and be connected with the pipeline of bleeding.
In the present embodiment, described mechanical pump 11 is Edwards RV12 oil-sealed rotary pump, pumping speed 3L/S, and vacuum range is from atmospheric pressure (1.013 * 10
5Pa) to about 0.002mbar (0.2Pa), end vacuum can reach 10
-1Pa is used for the bleed low vacuum of pipeline 5 of realization system, as the forepump of molecular pump, is used for the startup of molecular pump 4 under the low vacuum environment simultaneously, further to system's pipeline 5 pumping high vacuums of bleeding.
Its pumping speed of described molecular pump 350L/S, ultimate pressure＜1 * 10
-10Mbar takes out pump as the master of the pipeline 5 of bleeding, and major function be used for the bleeding exhaust of pipeline 5 realizes the requirement of high vacuum; The range of described ionization gauge 1 is 1000mbar-5 * 10
-10Mbar, major function is to take out the high vacuum of acquisition, measurement and the demonstration of ultrahigh vacuum for the molecular pump master.
In the present embodiment, described the first vacuum valve 2 and the second vacuum valve 7 are the all-metal vacuum valve.The material of pipeline 5 of bleeding is stainless steel.Described sylphon seal valve 6 is variable valve of a kind of pressure balance type, valve body structure is compact, it is streamlined that the fluid passage is S, droop loss is little, flow is large, adjustable extent is wide, bonnet, adopts wave duct line hermetically-sealed construction, can thoroughly eliminate the possibility of processing medium from the stem movement gap to external leakage;
Described adsorption trap 10 mainly adopts activated aluminas as getter, the condensability steam that the physisorption mechanical pump is got rid of; Described Pirani gauge 12 is mainly used in bleed measurement and the demonstration of low vacuum of pipeline 5 of 11 pairs of mechanical pumps, and range is 1000mbar-5 * 10
-4Mbar.
The present invention also provides a kind of method for extracting crude oil, local water rare gas, and described extracting method may further comprise the steps:
1) before access sample bottle 18 and sampling jar 19, to the startup of the extraction element 100 of rare gas in crude oil, the local water and the first loop and second servo loop are vacuumized;
A) power-line plug with extraction element inserts the metope electric socket;
B) open the extraction element total power switch;
C) close the first vacuum valve 2 and the second vacuum valve 7, open sylphon seal valve 6, start 11 pairs of the first loops of mechanical pump and second servo loop and take out low vacuum;
D) treat that the demonstration of mechanical pump 11 vacuum registrations enters 10
-1Pa starts molecular pump 4 " START " button, waits for that molecular pump 4 control panel LOAD pilot lamp run to the low order end green light and keep Chang Liang from a left side, and the molecular pump normal operation is to the first loop and second servo loop pumping high vacuum;
2) after access sample bottle 19 and the sampling jar 18, exhaust pipe 5 and sampling jar 18 are vacuumized;
The sample bottle 19 that a) crude oil, local water will be housed is with sampling jar 18 series connection of a sky, by sampling jar 18 upper, sample bottle 19 under position relationship with two bottle grafts enter the to bleed injection port of pipeline 5 other ends;
C) open mechanical pump 11 and the second vacuum valve 7 between the pipeline 5 of bleeding, keep the first vacuum valve 2 still to be in closed condition, rotation sampling jar 18 two ends operation valves are communicated with sampling jar 18 cavitys and two bottles of junctions, utilize mechanical pump 11 to take out low vacuum;
D) when showing, low vacuum enters 10
-1Pa closes the second vacuum valve 7, opens the first vacuum valve 2 of control molecular pump 4, and pumping high vacuum is carried out in two bottles of junctions and sampling jar 18 cavitys;
E) enter 10 when vacuum
-4During Pa, close sampling jar two ends operation valve about in the of 18, the first vacuum valve 2 of closing control molecular pump 4;
3) crude oil, local water fluid sample are carried out degassed processing, extract thus rare gas;
A) unload the sampling jar 18 of series connection and sample bottle 19 and reversed upside down position, with sample bottle 19 up, sampling jar 18 down;
B) open sample bottle 19 lower end seal valves and sampling jar 18 upper end seal valves, sample liquids constantly flows into below sampling jar 18 cavitys and finally is full of below sampling jar 18, the gas that enrichment is deviate from the top sample bottle 19;
C) close the seal valve of degassed sample bottle 19 lower ends of top, unload degassed sample bottle 19.
4) close rare gas extraction element in crude oil, the local water;
A) " STOP " button on closure molecule pump 4 control panels waits for that the LOAD pilot lamp moves to high order end from low order end, and molecular pump 4 quits work;
B) close mechanical pump 11 power switches and vacuum display switch;
C) last stopping device general supply is extracted power-line plug.
5) crude oil, local water are deviate from rare gas purification process in the gas;
To deviate from the existing rare gas sample-preparing system of sample bottle 19 accesses of gas in crude oil, the local water (referring to " a kind of sample-preparing system of inert gas extraction and fractionation and application thereof "; Application number is: in main part 201010236355.2)-" the rare gas sample preparation device in the rock gas ", the purification assemblies such as zirconium base stove of utilization " rare gas sample preparation device in the rock gas " carry out further rare gas enrichment, purifying to the gas of deviating from of crude oil, local water.
The extraction element of rare gas and method in crude oil of the present invention, the local water, realized to rare gas in crude oil, the local water extract efficiently, enrichment and purifying, the problem of sampling of sample rare gas analysis in crude oil, the local water and the atmosphere polluting problem in the rare gas preparation process have been solved, for rare gas component in follow-up crude oil, the local water and isotope analysis the reliability of the data and accuracy provide technical support and assurance, it is all significant to declare knowledge, oil-gas-source contrast and Hydrocarbon Formation Reservoirs phase etc. for the origin cause of formation of carrying out oil gas.
The above only is the schematic embodiment of the present invention, is not to limit scope of the present invention.Any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (12)
1. the extraction element of rare gas in a crude oil, the local water, it is characterized in that: described extraction element comprises an exhaust pipe, described exhaust pipe one end is connected with a mechanical pump with second servo loop by the first loop in parallel; The described exhaust pipe other end sequentially is sealedly connected with sampling jar and the sample bottle of mutual series connection, and described sampling jar and sample bottle two ends respectively are provided with respectively seal valve; Crude oil or local water sample are housed in the sample bottle; Be provided with successively the first vacuum valve, molecular pump, sylphon seal valve and Pirani gauge by exhaust pipe to mechanical pump in described the first loop; Be provided with the second vacuum valve in the described second servo loop.
2. the extraction element of rare gas in crude oil as claimed in claim 1, the local water, it is characterized in that: described extraction element also comprises a box-shaped rack, described box-shaped rack by top board, base plate and all around panel consist of, front panel is control panel; The box-shaped rack bottom is provided with four support rollers; Described mechanical pump is fixedly installed on the framework soleplate; Described molecular pump is fixed in the top board downside of frame by pivot flange.
3. the extraction element of rare gas in crude oil as claimed in claim 2, the local water is characterized in that: be connected with ionization gauge on the described molecular pump; The import of molecular pump is connected with exhaust pipe by the first vacuum valve, and the first vacuum valve and exhaust pipe are arranged at the top board upside.
4. the extraction element of rare gas in crude oil as claimed in claim 2, the local water, it is characterized in that: the import of described mechanical pump is provided with one second threeway, the second threeway one end is connected with adsorption trap and one first threeway in turn, the first threeway one end is connected with described Pirani gauge, the first threeway other end is connected in the molecule delivery side of pump by the first corrugated tube, is provided with described sylphon seal valve in described the first corrugated tube.
5. the extraction element of rare gas in crude oil as claimed in claim 4, the local water, it is characterized in that: the described second threeway other end is connected in described the second vacuum valve by the second corrugated tube, is communicated in described exhaust pipe by the second vacuum valve; Described the second vacuum valve is arranged at the top board upside.
6. the extraction element of rare gas in crude oil as claimed in claim 1, the local water is characterized in that: the described exhaust pipe other end is tightly connected with mutual sampling jar and sample bottle of connecting by a shoulder ring.
7. the extraction element of rare gas in crude oil as claimed in claim 1, the local water, it is characterized in that: described sampling jar and sample bottle are vial, sampling jar and sample bottle are comprised of cavity and two ends glass valve body respectively.
8. extracting method that utilizes in the claim 1～7 extraction element of rare gas in each described crude oil, the local water to carry out rare gas in crude oil, the local water, the extracting method of described rare gas may further comprise the steps:
1) before access sample bottle and sampling jar, to the startup of the extraction element of rare gas in crude oil, the local water and the first loop and second servo loop are vacuumized;
2) after access sample bottle and the sampling jar, exhaust pipe and sampling jar are vacuumized;
3) crude oil, local water fluid sample are carried out degassed processing, extract thus rare gas;
4) close the extraction element of rare gas in crude oil, the local water.
9. the extracting method of rare gas in crude oil as claimed in claim 8, the local water is characterized in that: in step 1) in comprise:
11) device for opening total power switch;
12) close the first vacuum valve and the second vacuum valve, open the sylphon seal valve between molecular pump and the mechanical pump, start mechanical pump the first loop and second servo loop are vacuumized;
13) treat that the demonstration of mechanical pump vacuum registration enters 10-1Pa, starts molecular pump the first loop and second servo loop are vacuumized.
10. the extracting method of rare gas in crude oil as claimed in claim 8, the local water is characterized in that: in step 2) in comprise:
The sample bottle that 21) crude oil, local water will be housed is with the sampling jar series connection of a sky, by sampling jar upper, sample bottle under position relationship with two bottle grafts enter the to bleed injection port of the pipeline other end;
22) open the seal valve at sampling jar two ends, be communicated with sampling jar cavity and two bottles of junctions, sample bottle and sampling jar junction and sampling jar cavity are vacuumized;
23) open mechanical pump and the second vacuum valve between the pipeline of bleeding, utilize mechanical pump to vacuumize;
24) enter 10-1Pa when the mechanical pump vacuum shows, close the second vacuum valve, open the first vacuum valve of control molecular pump, two bottles of junctions and sampling jar cavity are proceeded to vacuumize;
25) when vacuum enters 104Pa, close up and down sealed at both ends valve of sampling jar, the first vacuum valve of closing control molecular pump.
11. the extracting method of rare gas in crude oil as claimed in claim 8, the local water is characterized in that: in step 3) in comprise:
31) unload the sampling jar of series connection and sample bottle and reversed upside down position, with sample bottle up, sampling jar down;
32) open sample bottle lower end seal valve and sampling jar upper end seal valve, sample liquids constantly flows into below sampling jar cavity and finally is full of below sampling jar, the gas that enrichment is deviate from the sample bottle of top;
33) close the seal valve of degassed sample bottle lower end of top, unload degassed sample bottle.
12. the extracting method of rare gas in crude oil as claimed in claim 8, the local water is characterized in that: in step 4) in comprise:
41) closure molecule pump;
42) close mechanical pump;
43) close at last the extraction element general supply.
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