CN103217318A - Vacuum gas collection system for core gas of natural gas hydrate drilling field - Google Patents
Vacuum gas collection system for core gas of natural gas hydrate drilling field Download PDFInfo
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- CN103217318A CN103217318A CN2013101495666A CN201310149566A CN103217318A CN 103217318 A CN103217318 A CN 103217318A CN 2013101495666 A CN2013101495666 A CN 2013101495666A CN 201310149566 A CN201310149566 A CN 201310149566A CN 103217318 A CN103217318 A CN 103217318A
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Abstract
The invention provides a vacuum gas collection system for core gas of a natural gas hydrate drilling field. The vacuum gas collection system comprises a vacuum pumping unit (A), a gas collector (B) and an extraction unit (C), wherein the vacuum pumping unit (A) comprises a vacuum manufacturing glass tube (16) and a vacuum pump (19); the gas collector (B) comprises a tank body (1) and a tank body cover (4) which are detachable and are in seal connection, and the tank body cover (4) is provided with a main hole and a subsidiary hole which is provided with a subsidiary hole tube (5); and the main hole of the tank cover (4) is provided with the extraction unit (C), and is communicated with an extraction chamber of the extraction unit (C). The vacuum gas collection system provided by the invention utilizes vacuum negative pressure in the gas collector and the gas collection and extraction chamber with a specific structure to extract release gas from a core sample, and thus the collecting efficiency of gas is improved; multiple sealing structures are utilized to eliminate air influence, and thus the quality of collected gas samples is guaranteed; and a water bath thermostat is utilized to deaerate, so that the influence of environment temperature change is removed, and the comparability of a core collecting capacity is improved.
Description
Technical field
The present invention relates to the gas extraction field, relate to the vacuum air-taking system that a kind of gas hydrate are drilled on-the-spot rock core gas more specifically.
Background technology
Gas hydrate are a kind of high density (1 m
3Can discharge 164 m
3Methane) clean energy resource, be 2 times of conventional energy resources resource summations such as global coal, oil, rock gas, caused showing great attention to of global many countries.In the drilling process, rock core discharges the size of gas flow, is that one of key parameter whether hydrate exists is judged at the scene fast.Therefore, hydrate situ of drilling well rock core gas extraction equipment is the collection of probing gas on-site, measurement and then declare the important foundation equipment of knowing hydrate fast.
Through literature search, at present domestic and international gas hydrate drilling well rock core gas collecting extracting method mainly contains the static headspace gas method and leaves standstill degassing method.The former is mainly used in the gas of gathering in the rock core (or landwaste), and the latter then is used to gather the gas of hydrate rock core, and concrete grammar is as follows:
1, static headspace gas method, concrete operations are: the core sample that 5cm is long is weighed and is packed into and be furnished with in the metal can of dottle pin, adding water makes between metal can and the sample and is full of water, certain locus (100ml) is left on top, the germifuge (sodium azide) that adds 2.3g in the water, then sample and water-stop are got up, be inverted refrigeration and transportation, after delivering to the laboratory, the sample temperature of refrigeration is returned to 20 ℃, carry out 5 minutes high speed machine vibration again, get a certain amount of container top space gas (15ml) then and carry out hydrocarbon composition and isotope analysis.This method adopts normal temperature mechanical oscillation mode to discharge gas, and advantage is: field operation is simple, quick; Shortcoming is: (1) along with the decomposition and the gas of hydrate discharge, the pressure in the metal can is increasing, has suppressed the decomposition of hydrate, causes gas to discharge not exclusively; (2) decompose the air that the hydrocarbon gas that discharges has been sneaked into metal can top headspace, cause a series of analytical errors.
2, leave standstill drainage, concrete operations are: select the higher and macroscopic hydrate core sample of content, it is immersed under water, the gas that decomposition of hydrate discharges, with the displacement water law gas that discharges is collected in the available bottle stopper sealed glass container, or temporarily be collected in the plastic injector of 60ml, import in the special-purpose vial then and seal up for safekeeping.This method adopts under the normal temperature and leaves standstill release naturally, and gas is got in draining, and advantage is that field operation is simple, has got rid of air influence; Shortcoming is: it is slower that (1) leaves standstill the nature release rate; (2) decomposed sample discharges influenced by environmental temperaturely, makes the decomposition of hydrate degree varies, and gas burst size error is bigger.
In sum, the above two kinds of methods that exist in the prior art all have the simple advantage of field operation, but have all also that decomposition rate is slow, efficient is low, incomplete, and shortcoming such as easily influenced by ambient temperature, but also may be subjected to the influence that air is sneaked into pollution.
Summary of the invention
The objective of the invention is to overcome and get the shortcoming that gas is insufficient, gas componant that take out is subject to air or ambient temperature effect in the above-mentioned prior art, provide a cover to be used for gas hydrate and drill the vacuum collector that on-the-spot rock core hydrocarbon gas is gathered, to improve the efficient and the precision of test result of hydrate core sample gas collecting.
The concrete technical scheme of the present invention is as follows:
A kind of gas hydrate are drilled the vacuum air-taking system of on-the-spot rock core gas, comprise: vacuum unit A, the air collector B and the unit C that bleeds, wherein said vacuum unit A comprises manufacturing glass tube with vacuum 16 and vacuum pump 19, described manufacturing glass tube with vacuum 16 can be connected with vacuum pump 19 by pipeline, described air collector B comprises tank body 1 and Cap for tin body 4 detachable and that be tightly connected, be formed with main aperture and secondary hole on the described Cap for tin body 4, secondary hole pipe 5 is installed on the described secondary hole, described secondary hole pipe 5 can connect described manufacturing glass tube with vacuum 16 by pipeline, the described unit C that bleeds is set on the main aperture of described Cap for tin body, and described main aperture is communicated with described aspirating chamber of bleeding unit C.
Further according to vacuum air-taking system of the present invention, wherein said manufacturing glass tube with vacuum 16 comprises a straight pipe and a side siphunculus, described straight pipe is managed 5 by pipeline with the secondary hole on the air collector B Cap for tin body 4 and is connected, and described side siphunculus is connected with vacuum pump 19 by pipeline.
Further according to vacuum air-taking system of the present invention, wherein said pipeline is that rubber connects flexible pipe 22,23, straight pipe valve 17 is housed on described straight pipe is used to control the switching of straight pipe, side siphunculus valve 18 is housed on described side siphunculus is used to control the switching of side siphunculus, described vacuum pump 19 is provided with gauge tap 20 and air pressure gauging table 21.
Further according to vacuum air-taking system of the present invention, wherein said tank body 1 is the core structure of an end opening, end sealing, openend is used to put into core sample, and the openend outer wall is provided with external thread, and the outer wall groove in the external thread lower end is equipped with first O-ring seal 2; The complete opening of one end of described Cap for tin body 4, the other end are provided with described secondary hole and main aperture, the openend inwall of described Cap for tin body 4 be provided with can with the close-connected internal thread of external thread of tank body 1 openend outer wall, and form sealing by first O-ring seal 2 and tank body 1 connecting maximum.
Further according to vacuum air-taking system of the present invention, the internal thread top of wherein said Cap for tin body 4 openends is formed with round table-like inner-cavity structure, the top of round table-like inner chamber is as described main aperture, between described internal thread top and round table-like intracavity bottom, be formed with a transition platform, described transition platform is provided with second O-ring seal 3, when Cap for tin body 4 and tank body 1 are tightened when being connected, the ora terminalis of described tank body 1 openend is low to be connect described second O-ring seal 3 and forms sealing with Cap for tin body 4.
Further according to vacuum air-taking system of the present invention, the side of main aperture is located in secondary hole on the wherein said Cap for tin body 4, described secondary hole pipe 5 through described secondary hole run through described Cap for tin body 4 inside and outside, and on the secondary hole in Cap for tin body outside pipe 5, be provided with valve switch 6, the length of the secondary hole pipe 5 of Cap for tin body inboard is greater than the height of Cap for tin body 4, extend into all the time below the liquid level in the air collector with the mouth of pipe that guarantees to get secondary hole pipe 5 in the gas process.
Further according to vacuum air-taking system of the present invention, the wherein said unit C that bleeds comprises the platform 7 of bleeding, band aspirating hole screw rod 8, bleed pin and seal gasket 9, the described platform 7 of bleeding be two stacked cylindrical and be arranged at directly over the described main aperture, described cylindrical inside down is formed with the aspirating chamber of spherical crown shape, the bottom of described aspirating chamber and described main aperture seamlessly transit UNICOM, the described cylindrical inside of going up is formed with interior cylindrical cavity, the top of described aspirating chamber is communicated with described interior cylindrical cavity, described seal gasket 9 is positioned in cylinder described at the bottom of the cylindrical cavity chamber and the low described aspirating chamber outlet that is connected to down cylinder downwards, and described band aspirating hole screw rod 8 is arranged in the described interior cylindrical cavity of going up cylinder and hangs down downwards and is connected to described seal gasket 9.
Further according to vacuum air-taking system of the present invention, wherein said band aspirating hole screw rod 8 profiles are the lower cylindrical shape, the top round pie, the center is provided with the aspirating hole 11 that two ends connect, the lower cylindrical outer wall has external thread, be formed with internal thread in the interior cylindrical cavity of the last cylinder of the described platform of bleeding, described band aspirating hole screw rod 8 top cake end faces are provided with in-line groove 10, be used for band aspirating hole screw rod 8 is screwed in the last cylinder of the described platform of bleeding with thread connecting mode, and making band aspirating hole screw rod 8 lower end roof pressures in described seal gasket 9, the described pin of bleeding enters aspirating chamber through the aspirating hole 11 puncture through seal rubber cushions 9 of band aspirating hole screw rod 8.
Further according to vacuum air-taking system of the present invention, the platform 7 of bleeding of the wherein said unit C that bleeds is integrally formed with the Cap for tin body 4 of described air collector B, and the material of described air collector is a stainless steel, and described O-ring seal 2,3 is a rubber seal.
Further according to vacuum air-taking system of the present invention, wherein also including constant temperature water bath case 12 is used to air collector that degassing environment is provided, described constant temperature water bath case 12 comprises: temperature control panel 13, tank 14 and tank body draw-in groove 15, described tank body draw-in groove 15 is arranged in the described tank 14, be used for fixing air collector, described temperature control panel 13 is arranged at sink outer walls.
Further according to vacuum air-taking system of the present invention, also comprise being used for the plastic cistern 24 that exhaust and the pin of bleeding are bled in the air collector.
The technical method that utilizes system of the present invention to carry out rock core gas vacuum extraction is:
1) utilizes operation under water, the tank body 1 of rock core and the air in the Cap for tin body 4 will be housed respectively discharge, by internal and external threads and the O-ring seal that respectively carries tank body 1 is connected sealing with Cap for tin body 4 again, form the air collector of sealing with saturated brine;
2) connect flexible pipe 22 by rubber and connect vacuum pump 19 and make glass tube with vacuum 16, and close and open valve 17, valve 18 respectively, utilize vacuum pump to make vacuum in making glass tube with vacuum 16, valve-off 18 then;
3) connecting flexible pipe 23 by the rubber of discharging air will make the straight pipe of glass tube with vacuum 16 and manage 5 with the secondary hole on the air collector and be connected, then successively open valve switch 6 and valve 17 on the pipe of the secondary hole of Cap for tin body, saturated brine in the air collector is entered in the manufacturing glass tube with vacuum 16, when saturated brine no longer enters glass tube with vacuum 16, produce vacuum in the valve-off switch 6, air collector and keep negative pressure;
4) utilize constant temperature water bath case heating air collector, promote a jar interior rock core fast and stable to discharge gas.The particular design of aspirating chamber inner chamber on the Cap for tin body, the gas that makes the interior rock core of air collector discharge is pooled to the spherical crown shape aspirating chamber of aspirating hole 11 belows, and the sample introduction needle of guaranteeing to bleed can extract the gas that rock core discharges to greatest extent.
The vacuum air-taking system of drilling on-the-spot rock core gas by gas hydrate of the present invention can reach following technique effect at least:
1), utilize the negative pressure of vacuum in the air collector, not only accelerate the gas release rate of gas hydrate test core, improved gas collecting efficient; And got rid of the influence that air is sneaked into, guaranteed to gather the quality of gaseous sample;
2), the particular design of Cap for tin body inner chamber, guaranteed that gas that the hydrate probe boring rock core discharges collects in the spherical crown shape aspirating chamber of the tank body caping under the aspirating hole, this not only is beneficial to the effective extracting gases of the pin of bleeding, and also can come out gas extraction to greatest extent;
3), the use of constant temperature water bath case, accelerated not only that rock core discharges the speed of gas in the air collector, and kept the constancy of air collector internal temperature, got rid of the influence of variation of ambient temperature, improved the comparability of rock core collection capacity.
Description of drawings
Accompanying drawing 1 is drilled the modular construction synoptic diagram of the vacuum air-taking system of on-the-spot rock core gas for gas hydrate of the present invention;
Accompanying drawing 2 is drilled the structure for amplifying synoptic diagram of the unit of bleeding in the vacuum air-taking system of on-the-spot rock core gas for gas hydrate of the present invention;
The vacuum air-taking system that accompanying drawing 3 is drilled on-the-spot rock core gas for gas hydrate of the present invention produces negative pressure of vacuum process synoptic diagram
The implication of each Reference numeral is as follows among the figure:
The 1-tank body, 2-first O-ring seal, 3-second O-ring seal, the 4-Cap for tin body, the secondary hole of 5-pipe, the 6-valve switch, the 7-platform of bleeding, 8-band aspirating hole screw rod, the 9-seal gasket, 10-in-line groove, the 11-aspirating hole, 12-constant temperature water bath case, 13-temperature control panel, the 14-tank, 15-tank body draw-in groove, 16-makes glass tube with vacuum, 17-straight pipe valve, 18-side siphunculus valve, the 19-vacuum pump, the 20-gauge tap, 21-barometer scale, 22-23-connects flexible pipe, the 24-plastic cistern, the A-vacuum unit, the B-air collector, the C-unit of bleeding, the D-environmental chamber that outgases.
Embodiment
The vacuum air-taking system of gas hydrate of the present invention being drilled on-the-spot rock core gas below in conjunction with accompanying drawing is described in detail, but does not therefore limit the application's protection domain.
As shown in Figure 1, the gas hydrate of the present invention overall constituent components of vacuum air-taking system of drilling on-the-spot rock core gas comprises: vacuum unit A, air collector B, unit C and degassing environmental chamber D bleed.
Wherein vacuum unit A comprises manufacturing glass tube with vacuum 16, vacuum pump 19, connects flexible pipe 22-23 and plastic cistern 24, make glass tube with vacuum 16 and comprise a straight pipe and a side siphunculus, straight pipe connects among flexible pipe 23 and the air collector B the secondary hole on the Cap for tin body 4 by rubber and manages 5 and be connected, and straight pipe valve 17 is installed on straight pipe, is used to control the opening and closing of straight pipe; The side siphunculus is connected with vacuum pump 19 by rubber hose 22, side siphunculus valve 18 is housed on it, be used to control UNICOM and shutoff with vacuum pump 19, also be provided with gauge tap 20 and air pressure gauging table 21 on the described vacuum pump 19, gauge tap 20 is used to open and close vacuum pump and the time of making vacuum is taken out in control, barometer scale 21 shows the pressure of making after vacuumizing in the glass tube with vacuum 16, and plastic cistern 24 is used to discharge the air that connects in the flexible pipe 23.
Wherein air collector B comprises tank body 1 and Cap for tin body 4, and described tank body 1 is the stainless steel core structure of an end opening, and openend is used to put into core sample; The openend outer wall has external thread, is used for closely being connected with the internal thread of Cap for tin body 4 openends; Groove in tank body 1 outer wall external thread lower end is equipped with rubber seal 2, is used for the auxiliary seal between tank body 1 outer wall and Cap for tin body 4 inwalls.Described Cap for tin body 4 is that the complete opening of an end, the other end then are the detachable stainless steel device that has the perforate end of a secondary hole and a main aperture, the openend of described Cap for tin body 4 is the pipe shape, internal thread is arranged on the inwall, by rotation, the tapped inwall of Cap for tin body 4 openends can closely be connected with the externally threaded outer wall of tank body 1 openend band, and is connecting maximum by the 2 formation sealings of tank body O-ring seal.Part on the described Cap for tin body 4 openend pipes is Cap for tin body 4 perforate ends, the inner chamber of described perforate end is round table-like inclined-plane, smooth surface, being beneficial to the gas that rock core discharges in the tank body 1 converges to the unit C that bleeds at top, the about 5mm(of top diameter of round table-like inner chamber bleeds and bleeds in the unit under the platform 7) about, and seamlessly transit with the spherical crown shape aspirating chamber in the platform of bleeding, spherical crown shape aspirating chamber is the final habitat of the gas that compiles through round table-like inner chamber, also is the aspirating chamber of inserting needle sampling.Between tapped top of Cap for tin body 4 openends and round table-like intracavity bottom, a transition platform is arranged, be used to place rubber seal 3, when Cap for tin body 4 is connected when tightening tank body 1 perforate end port with tank body 1, promptly the rubber seal 3 with Cap for tin body 4 forms sealing, and completely cuts off inside and outside making air collector.The main aperture of the perforate end of Cap for tin body 4 is the top (about the about 5mm of diameter) of round table-like inner chamber, upwards even transition is connected in the spherical crown shape aspirating chamber of the unit C that bleeds, the side of Cap for tin body 4 main apertures has secondary hole, secondary hole pipe 5 is one to run through the inside and outside stainless-steel tube of Cap for tin body 4 through secondary hole, Cap for tin body 4 outsides, have valve switch 6 on the secondary hole pipe 5, Cap for tin body 4 inboards, the length of secondary hole pipe 5, should be greater than the pipe height of Cap for tin body 4 openends, so that Cap for tin body 4 is connected sealing with tank body 1 after, during the upright extracting gases of tank body 1, secondary hole is managed 5 the mouth of pipe and is extend into below the liquid level all the time.Secondary hole, Cap for tin body 4 outsides pipe 5 connects flexible pipe 23 by rubber and links to each other with the straight pipe of making glass tube with vacuum 16 bottoms, and the valve switch 6 on the secondary hole pipe 5 is used to control being communicated with of the external world and air collector B inside.
The unit C that wherein bleeds comprises the platform 7 of bleeding, band aspirating hole screw rod 8, bleed pin and seal gasket 9, be provided with the platform 7 of bleeding directly over the main aperture on the top of described Cap for tin body 4 round table-like inner chambers, described platform 7 outward appearances of bleeding be two stacked cylindrical, following cylindrical inside is formed with spherical crown shape aspirating chamber, the aspirating chamber bottom seamlessly transits with the round table-like interior top of chamber (main aperture) of Cap for tin body and is communicated with, the aspirating chamber top is communicated in the tapped interior cylindrical cavity of cylinder, and the cylindrical cavity internal diameter greater than spherical crown shape aspirating chamber top exit internal diameter so that place seal gasket 9, structure for amplifying as shown in Figure 2, described seal gasket 9 is positioned at the bottom of the interior cylindrical cavity chamber of cylinder, and the low downwards spherical crown shape aspirating chamber outlet that is connected to down cylinder, band aspirating hole screw rod 8 is screwed in the internal thread of last cylinder cylindrical cavity, and the low downwards sealing special seal gum pad 9 that is connected to.Band aspirating hole screw rod 8 profiles are the lower cylindrical shape, the top round pie.Lower cylindrical outer wall belt screw thread forms tight the connection with screw thread on the cylindrical cavity inwall of cylinder on the platform of bleeding.Band aspirating hole screw rod 8 top cake end faces are provided with an in-line groove 10 of crossing the center, be used to screw band aspirating hole screw rod 8, when tightening band aspirating hole screw rod 8, its lower end roof pressure special seal gum pad 9 and spherical crown shape aspirating chamber in the platform 7 of will bleeding be with outside isolated, and then air collector B is inner and outside isolated.The center of band aspirating hole screw rod 8 is the aspirating hole 11 that two ends connect, and the upper end is positioned at the centre of in-line groove 10, the lower end spherical crown shape aspirating chamber in the platform of bleeding over against the Cap for tin body top.Special seal gum pad 9 places the last cylindrical cavity bottom of the platform 7 of bleeding, and can sealed shell of tank builds the spherical crown shape aspirating chamber at 4 tops, the pin inserting needle that also can be used for bleeding, extract by.In the preferred technical solution of the present invention, the Cap for tin body 4 of described bleed unit C and described air collector B is integrally formed, it is make progress in its end face main aperture position platform of bleeding of the integrally formed unit of bleeding of Cap for tin body 4, that is the platform 7 of bleeding can be structure as a whole to guarantee that the round platform inner chamber is communicated with the sealing of spherical crown shape aspirating chamber with Cap for tin body 4, and two included stacked right cylinders of the platform of bleeding certainly also can be integrally formed with the assurance impermeability.In this preferred embodiment, can be with described unit and the air collector unified Definition of bleeding that be in integrative-structure for getting the gas unit, the described unit C that bleeds is as the delivery outlet part of air collector B, but the present invention is not as limit, both can otherwise link together, as long as can guarantee impermeability therebetween.
Wherein said degassing environmental chamber D preferably adopts a constant temperature water bath case 12, mainly comprises: temperature control panel 13, tank 14 and tank body draw-in groove 15, and tank body draw-in groove 15 is arranged in the tank 14, is used for fixing the tank body 1 among the air collector B; Temperature control panel 13 is arranged at sink outer walls, the temperature of water in the scalable tank 14.
Adopting vacuum air-taking system of the present invention to carry out gas hydrate, to drill the leaching process of on-the-spot rock core gas as follows:
(1) early-stage preparations
The each collection before the gas places the cylindrical cavity bottom of cylinder on the platform 7 of bleeding to special seal gum pad 9, then is screwed into band aspirating hole screw rod 8, and with a word screwdriver being with aspirating hole screw rod 8 to tighten, to compress seal gasket.
Check whether tank body O-ring seal 2 and Cap for tin body O-ring seal 3 place, and put into saturated brine in plastic cistern 24, and the degree of depth is advisable so that air collector is flooded fully.
Open the valve switch 6 of Cap for tin body 4, Cap for tin body 4 is submerged in fully in the plastic cistern 24 that holds saturated brine, to discharge wherein air.
(2) deaeration
Earlier the rock core that hydrate probe boring is obtained is used flushing with clean water rapidly, weigh or measure volume after put into air collector tank body 1 as early as possible, the tank body 1 that core sample then will be housed is immersed in the plastic cistern 24 that saturated brine is housed fully, to discharge wherein air.
Under water Cap for tin body 4 is buckled on the tank body 1, Cap for tin body 4 is tightened sealing, constituted a complete air collector, discharge wherein air simultaneously, as shown in Figure 3 with isolated plant.Then close the valve switch 6 of secondary hole pipe 5 on the Cap for tin body 4, so that air collector is inner isolated fully with the external world.
(3) make negative pressure of vacuum
As shown in Figure 3, utilize rubber pipette bulb to discharge rubber under water and connect air in the flexible pipe 23, close the straight pipe valve 17 of making glass tube with vacuum 16, then rubber is connected flexible pipe 23 1 ends and be fixed on the secondary hole of the Cap for tin body pipe 5, the other end is fixedly attached on the straight pipe of making glass tube with vacuum 16; Then an end of rubber connection flexible pipe 22 is connected on the side siphunculus of making glass tube with vacuum 16, the other end connects on the aspirating hole of vacuum pump 19.
It is uprightly steady to lay air collector B, opens side siphunculus valve 18, opens the gauge tap 20 of vacuum pump, treat that barometer scale 21 stable reading continue half a minute after, successively close side siphunculus valve 18 and vacuum pump switch 20.At this moment, make glass tube with vacuum 16 and formed stable vacuum negative pressure condition.
Open the valve switch 6 on the pipe of the secondary hole of Cap for tin body, slowly open the straight pipe valve 17 of making glass tube with vacuum 16 again.This moment, air collector inside was communicated with manufacturing glass tube with vacuum 16, and the saturated brine in the air collector flows under the effect of negative pressure to be made in the glass tube with vacuum 16.Wait to make in the glass tube with vacuum behind the stable level (pressure reaches balance), close the valve switch 6 on the pipe of the secondary hole of Cap for tin body, promptly form negative pressure in the air collector B.Open the side siphunculus valve 18 of glass tube with vacuum 16, after treating to return to normal atmosphere (An) in the glass tube with vacuum, extract glass tube with vacuum 16.
(4) the constant temperature degassing
The above-mentioned sealing air collector that is contained with the hydrate probe boring core sample and has a vacuum negative pressure condition is put into the tank body draw-in groove 15 of 40 ℃ constant temperature water bath case 12, and make water flooding Cap for tin body 4 in the constant temperature water bath case tank 14, heated at constant temperature 2 hours is promptly finished degasification process.
(5) extracting gases
With flat the crouching in the plastic cistern 24 of splendid attire saturated brine of air collector of finishing the degassing, the rubber of having discharged air to be installed under water to be connected flexible pipe 23 on the secondary hole of Cap for tin body 4 pipe 5, rubber connects flexible pipe 23 other ends and places in the plastic cistern water body.
Stand up air collector.To the pin of bleeding of a small amount of saturated brine be housed by the aspirating hole 11 on the band aspirating hole screw rod 8, slowly pierce through special seal gum pad 9, enter the spherical crown shape aspirating chamber (pin salt solution injection air collector or air collector gas enter the pin of bleeding in case bleed, and promptly show to penetrate aspirating chamber) at Cap for tin body top.
Open the valve switch 6 on the pipe of the secondary hole of Cap for tin body, the beginning extracting gases.Bleed finish after, the gas in the needle tubing of bleeding is injected in (being full of saturated brine) the special-purpose gas bottle be inverted in saturated brine, tighten the gas collection bottle cap sealing under water and get final product.
The gas of gas bottle, or be sent to the field experiment chamber and analyze at once, or being inverted into cold compartment of refrigerator preserves.
Below only be that preferred implementation of the present invention is described; technical scheme of the present invention is not limited to this; the any known distortion that those skilled in the art are done on the basis of major technique of the present invention design all belongs to the claimed technology category of the present invention, and the concrete protection domain of the present invention is as the criterion with the record of claims.
Claims (11)
1. gas hydrate are drilled the vacuum air-taking system of on-the-spot rock core gas, it is characterized in that, comprise: vacuum unit (A), air collector (B) and the unit of bleeding (C), wherein said vacuum unit (A) comprises makes glass tube with vacuum (16) and vacuum pump (19), described manufacturing glass tube with vacuum (16) can be connected with vacuum pump (19) by pipeline, described air collector (B) comprises tank body (1) and Cap for tin body (4) detachable and that be tightly connected, be formed with main aperture and secondary hole on the described Cap for tin body (4), secondary hole pipe (5) is installed on the described secondary hole, described secondary hole pipe (5) can be connected in described manufacturing glass tube with vacuum (16) by pipeline, the described unit of bleeding (C) is set on the main aperture of described Cap for tin body, and described main aperture is communicated with the aspirating chamber of the described unit of bleeding (C).
2. vacuum air-taking system according to claim 1, it is characterized in that, wherein said manufacturing glass tube with vacuum (16) comprises a straight pipe and a side siphunculus, described straight pipe is connected by the secondary hole pipe (5) on the Cap for tin body (4) of pipeline and air collector (B), and described side siphunculus is connected with vacuum pump (19) by pipeline.
3. vacuum air-taking system according to claim 2, it is characterized in that, described pipeline is that rubber connects flexible pipe (22,23), straight pipe valve (17) is housed on described straight pipe is used to control the switching of straight pipe, side siphunculus valve (18) is housed on described side siphunculus is used to control the switching of side siphunculus, described vacuum pump (19) is provided with gauge tap (20) and air pressure gauging table (21).
4. according to each described vacuum air-taking system of claim 1-3, it is characterized in that, wherein said tank body (1) is the core structure of an end opening, end sealing, openend is used to put into core sample, the openend outer wall is provided with external thread, and the outer wall groove in the external thread lower end is equipped with first O-ring seal (2); The complete opening of one end of described Cap for tin body (4), the other end are provided with described secondary hole and main aperture, the openend inwall of described Cap for tin body (4) be provided with can with the close-connected internal thread of external thread of tank body (1) openend outer wall, and be tightly connected by extruding first O-ring seal (2) and tank body (1) formation connecting maximum.
5. vacuum air-taking system according to claim 4, it is characterized in that, the internal thread top of described Cap for tin body (4) openend is formed with round table-like inner chamber, the top of round table-like inner chamber is as described main aperture, between described internal thread top and round table-like intracavity bottom, be formed with a transition platform, described transition platform is provided with second O-ring seal (3), when Cap for tin body (4) and tank body (1) are tightened when being connected, the ora terminalis of described tank body (1) openend is low connect described second O-ring seal (3) thus form sealing with Cap for tin body (4).
6. according to each described vacuum air-taking system of claim 1-5, it is characterized in that, the side of main aperture is located in secondary hole on the described Cap for tin body (4), described secondary hole pipe (5) through described secondary hole run through described Cap for tin body (4) inside and outside, and on the secondary hole pipe (5) in the Cap for tin body outside, be provided with valve switch (6), at the height of the secondary hole of Cap for tin body inboard pipe (5) length, extend into all the time below the liquid level in the air collector to guarantee to get secondary hole pipe (5) mouth of pipe in the gas process greater than Cap for tin body (4).
7. according to each described vacuum air-taking system of claim 1-6, it is characterized in that, the wherein said unit of bleeding (C) comprises the platform of bleeding (7), band aspirating hole screw rod (8) and seal gasket (9), the described platform of bleeding (7) be two stacked cylindrical and be arranged at directly over the described main aperture, described cylindrical inside down is formed with the aspirating chamber of spherical crown shape, the bottom of described aspirating chamber seamlessly transits with described main aperture and is communicated with, the described cylindrical inside of going up is formed with interior cylindrical cavity, the top of described aspirating chamber is communicated with described interior cylindrical cavity, described seal gasket (9) is positioned in cylinder described at the bottom of the cylindrical cavity chamber and the low described aspirating chamber outlet that is connected to down cylinder downwards, and described band aspirating hole screw rod (8) is arranged in the described interior cylindrical cavity of going up cylinder and hangs down downwards and is connected to described seal gasket (9).
8. vacuum air-taking system according to claim 7, it is characterized in that, described band aspirating hole screw rod (8) profile is the lower cylindrical shape, the top round pie, the center is provided with the aspirating hole (11) that two ends connect, the lower cylindrical outer wall has external thread, be formed with internal thread in the interior cylindrical cavity of the last cylinder of the described platform of bleeding, described band aspirating hole screw rod (8) top cake end face is provided with an in-line groove (10) of crossing the center, be used for band aspirating hole screw rod (8) is screwed in the last cylinder of the described platform of bleeding with thread connecting mode, and making band aspirating hole screw rod (8) lower end roof pressure in described seal gasket (9), the pin of bleeding enters aspirating chamber through aspirating hole (11) the puncture through seal rubber cushion (9) of band aspirating hole screw rod (8).
9. according to each described vacuum air-taking system of claim 1-8, it is characterized in that, the platform of bleeding (7) of the described unit of bleeding (C) is integrally formed with the Cap for tin body (4) of described air collector (B), two stacked cylinders of the described platform of bleeding are integrally formed, and the material of described air collector is a stainless steel; Described O-ring seal (2,3) is a rubber seal.
10. according to each described vacuum air-taking system of claim 1-9, it is characterized in that, also include constant temperature water bath case (12), be used to air collector that degassing environment is provided, described constant temperature water bath case (12) comprising: temperature control panel (13), tank (14) and tank body draw-in groove (15), described tank body draw-in groove (15) is arranged in the described tank (14), is used for fixing air collector, and described temperature control panel (13) is arranged at sink outer walls.
11., also comprise being used for the water tank (24) that air collector exhaust and the pin of bleeding are bled according to each described vacuum air-taking system of claim 1-10.
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| CN201310149566.6A CN103217318B (en) | 2013-04-26 | 2013-04-26 | The vacuum air-taking system of the on-the-spot rock core gas of a kind of Gas Hydrate Drilling |
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| CN201310149566.6A CN103217318B (en) | 2013-04-26 | 2013-04-26 | The vacuum air-taking system of the on-the-spot rock core gas of a kind of Gas Hydrate Drilling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106680029A (en) * | 2015-11-11 | 2017-05-17 | 中国石油化工股份有限公司 | Portable vacuum sampling bottle and application method thereof |
| CN108387704A (en) * | 2018-01-25 | 2018-08-10 | 广州海洋地质调查局 | The decomposition of liquid nitrogen frozen gas hydrates sample and burner and its method |
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| CN101051007A (en) * | 2006-04-06 | 2007-10-10 | 中国石油化工股份有限公司 | Device for preparing or collecting adsorptive gaseous hydrocarbon in rock |
| CN202793863U (en) * | 2012-09-27 | 2013-03-13 | 中国科学院地质与地球物理研究所兰州油气资源研究中心 | Rock analysis gas high vacuum degassing and gas collecting device |
| CN203216762U (en) * | 2013-04-26 | 2013-09-25 | 中国地质调查局油气资源调查中心 | Vacuum gas collecting system applied to core gas in natural gas hydrate drilling site |
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Patent Citations (3)
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| CN101051007A (en) * | 2006-04-06 | 2007-10-10 | 中国石油化工股份有限公司 | Device for preparing or collecting adsorptive gaseous hydrocarbon in rock |
| CN202793863U (en) * | 2012-09-27 | 2013-03-13 | 中国科学院地质与地球物理研究所兰州油气资源研究中心 | Rock analysis gas high vacuum degassing and gas collecting device |
| CN203216762U (en) * | 2013-04-26 | 2013-09-25 | 中国地质调查局油气资源调查中心 | Vacuum gas collecting system applied to core gas in natural gas hydrate drilling site |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106680029A (en) * | 2015-11-11 | 2017-05-17 | 中国石油化工股份有限公司 | Portable vacuum sampling bottle and application method thereof |
| CN108387704A (en) * | 2018-01-25 | 2018-08-10 | 广州海洋地质调查局 | The decomposition of liquid nitrogen frozen gas hydrates sample and burner and its method |
| CN108387704B (en) * | 2018-01-25 | 2024-03-19 | 广州海洋地质调查局 | Decomposing and burning device and method for liquid nitrogen frozen natural gas hydrate sample |
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| CN103217318B (en) | 2016-04-13 |
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