CN203203848U - Vacuum gas collector for core gas extraction in natural gas hydrate drilling field - Google Patents
Vacuum gas collector for core gas extraction in natural gas hydrate drilling field Download PDFInfo
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- CN203203848U CN203203848U CN 201320217763 CN201320217763U CN203203848U CN 203203848 U CN203203848 U CN 203203848U CN 201320217763 CN201320217763 CN 201320217763 CN 201320217763 U CN201320217763 U CN 201320217763U CN 203203848 U CN203203848 U CN 203203848U
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- tank body
- gas
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Abstract
The utility model provides a vacuum gas collector for core gas extraction in a natural gas hydrate drilling field. The vacuum gas collector comprises a tank body (1) and a tank body cover (4), wherein the tank body (1) is of a cylinder structure having one open end and one closed end; the tank body cover (4) is of a cover type structure having one completely open end and having the other end provided with a main hole and an auxiliary hole; the main hole is connected to an air exhaust unit (7); an auxiliary hole pipe (5) is arranged on the auxiliary hole; the tank body (1) and the tank body cover (4) can be hermetically connected. The vacuum gas collector provided by the utility model is capable of simultaneously satisfying the requirements of core gas extraction on sealing property, gas collection, gas exhaust and vacuum negative pressure and is suitable for popularization and application in the core gas collecting field.
Description
Technical field
The utility model relates to the gas assembling sphere, relates to a kind of rock core gas, especially gas hydrate of being applicable to more specifically and drills the vacuum air collector of on-the-spot rock core gas extraction.
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, be that one of key parameter whether hydrate exists is judged at the scene fast, so the extraction equipment of situ of drilling well rock core gas, be that the collection of probing gas on-site, measurement and then the important foundation of declaring the knowledge hydrate are fast equipped.
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 drainage, and the former is mainly used in gathering the gas in the rock core, the latter then is used for gathering the gas of hydrate rock core, and concrete grammar is as follows:
1, static headspace gas method, concrete operations are: core sample is weighed and pack into and be furnished with in the metal can of dottle pin, add water and make between metal can and the sample and be full of water, certain locus is left on top, adds germifuge in the water, then sample and water-stop are got up, be inverted refrigeration and transportation, deliver to the laboratory after, the sample temperature of refrigeration is returned to 20 ℃, carry out the high speed machine vibration of certain hour again, get a certain amount of container top space gas 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 release of hydrate probe boring rock core gas, the pressure in the metal can is increasing, has suppressed the release of rock core gas, causes gas to discharge not exclusively.2) hydrocarbon gas that discharges has been sneaked into the air of metal can top headspace, causes 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, 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 to leave standstill the nature release rate.
In sum, the above two kinds of rock cores that exist in the prior art get gas method all exist rock core gas release rate slow or not exclusively, get shortcomings such as gas efficient is low.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming that used gas extractor exists in the above-mentioned existing rock core gas extraction, a kind of vacuum air collector of drilling on-the-spot rock core gas collecting for gas hydrate is proposed, air collector described in the utility model can be good at satisfying simultaneously the rock core gas extraction by innovation structure design and sealing, gas is converged, bleeds and the requirement of aspect such as negative pressure of vacuum, is highly suitable for rock core gas collecting field and applies.
The concrete technical scheme of the utility model is as follows:
A kind of vacuum air collector of drilling on-the-spot rock core gas extraction for gas hydrate, comprise: tank body 1 and Cap for tin body 4, described tank body 1 is the core structure of an end opening, end sealing, described Cap for tin body 4 is that the complete opening of an end, the other end are the lid formula structure that is provided with main aperture and secondary hole, described main aperture connects the unit 7 of bleeding, described secondary hole is provided with secondary hole pipe 5, and described tank body 1 and Cap for tin body 4 can be tightly connected.
Further according to vacuum air collector described in the utility model, the openend outer wall of wherein said tank body 1 is provided with external thread, and the openend inwall of described Cap for tin body 4 is provided with internal thread, is threaded with tank body 1 by rotating described Cap for tin body 4.
Further according to vacuum air collector described in the utility model, the outer wall groove of wherein said tank body 1 in its external thread lower end is equipped with first O-ring seal 2, described Cap for tin body 4 and tank body 1 tighten be connected after, the inwall of described Cap for tin body 4 pushes described first O-ring seal 2 and described Cap for tin body 4 and 1 formation of tank body is tightly connected.
Further according to vacuum air collector described in the utility model, the internal thread top of wherein said Cap for tin body 4 openends 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 described Cap for tin body 4 and tank body 1 tighten be connected after, the ora terminalis of described tank body 1 openend is low connect described second O- ring seal 3 and and 4 formation of described Cap for tin body be tightly connected.
Further according to vacuum air collector described in the utility model, wherein described main aperture is provided with the described unit 7 of bleeding, and described main aperture is communicated with described aspirating chamber of bleeding unit 7.
Further according to vacuum air collector described in the utility model, the side of described main aperture is located in wherein said secondary hole, described secondary hole pipe 5 through described secondary hole run through described Cap for tin body 4 inside and outside.
Further according to vacuum air collector described in the utility model, wherein said secondary hole pipe 5 is provided with valve switch 6 in the Cap for tin body outside, at the length of the Cap for tin body inboard height greater than 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 collector described in the utility model, wherein said secondary hole pipe 5 passes through to connect flexible pipe and links to each other with extraneous pumped vacuum systems, and the pin of bleeding extracts the gas of collecting in the air collectors through the described unit 7 of bleeding.
Further according to vacuum air collector described in the utility model, the wherein said unit 7 of bleeding exports as bleeding of air collector and is integrally formed on the main aperture of described Cap for tin body 4.
Further according to vacuum air collector described in the utility model, wherein said air collector integral body is cylindric.
Further according to vacuum air collector described in the utility model, the round table-like inner chamber in the wherein said Cap for tin body 4 seamlessly transits with described aspirating chamber of bleeding unit 7 and is communicated with.
Further according to vacuum air collector described in the utility model, the end of the aspirating chamber inner chamber of the described unit 7 of bleeding be communicated with main aperture, the top be aspirating hole, aspirating hole is less than main aperture.
At least can reach following technique effect by vacuum air collector described in the utility model:
1), described vacuum air collector adopts double sealing structure at tank body and tank body cover piece, improved the sealing effectiveness of air collector integral body, stopped the possibility of entrained air in the gas collection process fully;
2), the particular design of described air collector inner chamber, guaranteed that rock core discharges the concentrated of gas and converges, be very beneficial for the sample introduction needle extracting gases, also can come out gas extraction to greatest extent;
3), the project organization of high strength sealing effectiveness and secondary hole pipe, can make the inside of air collector described in the utility model form negative pressure of vacuum by vacuum extractor, not only accelerated the gas release rate of rock core, improve gas collecting efficient, and got rid of the influence that air is sneaked into, guaranteed to gather the quality of gaseous sample;
4), easy to connect between the tank body of vacuum air collector described in the utility model and Cap for tin body, vacuumize gentle sample and extract all very conveniently, integral body possesses advantage simple to operate, easy to use.
Description of drawings
Accompanying drawing 1 is the structural representation of vacuum air collector described in the utility model;
The implication of each Reference numeral is as follows among the figure:
The secondary hole of 1-tank body, 2-first O-ring seal, 3-second O-ring seal, 4-Cap for tin body, 5-pipe, 6-valve switch, the 7-unit of bleeding.
Embodiment
Below in conjunction with accompanying drawing the vacuum air collector for the rock core gas extraction described in the utility model is described in detail, but does not therefore limit protection domain of the present utility model.
As shown in Figure 1, vacuum air collector described in the utility model totally comprises: tank body 1 and Cap for tin body 4.
Described tank body 1 is the stainless steel core structure of an end opening, end sealing, and openend is used for putting 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 first O-ring 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 extruding first O-ring seal 2 formation first resealing.
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 gas that rock core in the tank body 1 discharges converges to the unit 7 of bleeding at top, the top of round table-like inner chamber is smoothly transitted into the aspirating chamber in the unit 7 of bleeding, the aspirating chamber in the unit 7 of bleeding is the final habitat of the gas that compiles through round table-like inner chamber, also is that the inserting needle sampling is local.Between the tapped top of Cap for tin body 4 openends and round table-like intracavity bottom, a transition platform is arranged, be used for placing second O-ring seal 3, when Cap for tin body 4 is connected with tank body 1 when tightening, low second O-ring seal 3 that is connected to Cap for tin body 4 of tank body 1 openend ora terminalis forms second resealing, thereby makes air collector inside and outside isolated.
The main aperture of the perforate end of Cap for tin body 4 is the top (the about 5mm of diameter) of round table-like inner chamber, and upwards even transition is connected in the aspirating chamber of the unit 7 of bleeding, and the aspirating chamber inner chamber is the spherical crown shape; The side of Cap for tin body 4 main apertures has secondary hole, secondary hole pipe 5 is the stainless-steel tube inside and outside Cap for tin body 4 is run through in secondary hole, in Cap for tin body 4 outsides, have valve switch 6 on the secondary hole pipe 5, in Cap for tin body 4 inboards, the stainless-steel tube 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 lower nozzle and is extend into below the liquid level all the time.Secondary hole, Cap for tin body 4 outsides pipe 5 connects flexible pipe by rubber and links to each other with extraneous pumped vacuum systems, is used for forming in air collector negative pressure of vacuum.
In optimal technical scheme of the present utility model, one connects the described unit of bleeding on the Cap for tin body of vacuum air collector, the described delivery outlet part of unit 7 as air collector of bleeding, but the utility model is not as limit, both can otherwise link together, as long as can guarantee impermeability therebetween.
The process of using vacuum air collector described in the utility model to carry out the rock core gas extraction is as follows:
Whether bleed unit sealing of inspection is good, and checks whether first O-ring seal 2 and second O-ring seal 3 place;
Open the valve switch 6 of Cap for tin body 4, Cap for tin body 4 is submerged in fully in the plastic cistern that holds saturated brine, to discharge wherein air.
The core sample that probing is obtained is rapidly with the clear water flushing, weigh or measure volume after hasten to put into stainless steel air collector tank body 1, the tank body 1 that core sample then will be housed is immersed in the plastic cistern that saturated brine is housed fully, to discharge wherein air.
Under water Cap for tin body 4 is buckled on the tank body 1, with isolated plant Cap for tin body 4 is tightened sealing, constituted a complete air collector, discharge wherein air simultaneously, then close the valve switch 6 of secondary hole pipe 5 on the Cap for tin body 4, so that isolated fully with the external world in the air collector.
Then vacuum unit is connected in secondary hole pipe 5 by pipeline, and open valve switch 6 on it, start vacuum unit and impel formation negative pressure of vacuum in the air collector that is full of salt solution, the core sample in the valve-off switch 6 behind negative regulation, air collector begins to discharge gas with this understanding.
After discharging certain hour, use the pin of bleeding to extract the gas that discharges by the unit 7 of bleeding, finish the extraction that core sample is discharged gas.
Below only be that preferred implementation of the present utility model is described; the technical solution of the utility model is not limited to this; the any known distortion that those skilled in the art do on the basis of major technique of the present utility model design all belongs to the claimed technology category of the utility model, and the concrete protection domain of the utility model is as the criterion with the record of claims.
Claims (12)
1. one kind is used for gas hydrate and drills the vacuum air collector of on-the-spot rock core gas extraction, it is characterized in that comprising: tank body (1) and Cap for tin body (4), described tank body (1) is the core structure of an end opening, end sealing, described Cap for tin body (4) is that the complete opening of an end, the other end are the lid formula structure that is provided with main aperture and secondary hole, described main aperture connects the unit (7) of bleeding, described secondary hole is provided with secondary hole pipe (5), and described tank body (1) and Cap for tin body (4) can be tightly connected.
2. vacuum air collector according to claim 1, it is characterized in that, the openend outer wall of wherein said tank body (1) is provided with external thread, and the openend inwall of described Cap for tin body (4) is provided with internal thread, is threaded with tank body (1) by rotating described Cap for tin body (4).
3. vacuum air collector according to claim 2, it is characterized in that, the outer wall groove of wherein said tank body (1) in its external thread lower end is equipped with first O-ring seal (2), described Cap for tin body (4) and tank body (1) tighten be connected after, the inwall of described Cap for tin body (4) pushes described first O-ring seal (2) and makes to form between described Cap for tin body (4) and tank body (1) and is tightly connected.
4. according to claim 2 or 3 described vacuum air collectors, 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 described Cap for tin body (4) and tank body (1) tighten be connected after, the ora terminalis of described tank body (1) openend is low connect described second O-ring seal (3) and and form between described Cap for tin body (4) and be tightly connected.
5. vacuum air collector according to claim 4 is characterized in that, described main aperture is provided with the described unit of bleeding (7), and described main aperture is communicated with the aspirating chamber of the described unit of bleeding (7).
6. according to claim 1-3 each or the described vacuum air collector of claim 5, it is characterized in that the side of described main aperture is located in described secondary hole, described secondary hole pipe (5) through described secondary hole run through described Cap for tin body (4) inside and outside.
7. vacuum air collector according to claim 6, it is characterized in that, described secondary hole pipe (5) is provided with valve switch (6) in the Cap for tin body outside, at the length of the Cap for tin body inboard height greater than 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.
According to claim 1-3 each, claim 5 or the described vacuum air collector of claim 7, it is characterized in that, described secondary hole pipe (5) links to each other with extraneous pumped vacuum systems by connecting flexible pipe, and the pin of bleeding extracts the gas of collecting in the air collector through the described unit of bleeding (7).
According to claim 1-3 each, claim 5 or the described vacuum air collector of claim 7, it is characterized in that the described unit of bleeding (7) is integrally formed on the main aperture of described Cap for tin body (4) as the outlet of bleeding of air collector.
According to claim 1-3 each, claim 5 or the described vacuum air collector of claim 7, it is characterized in that described air collector integral body is cylindric.
11. vacuum air collector according to claim 4 is characterized in that: the round table-like inner chamber in the described Cap for tin body (4) seamlessly transits with the aspirating chamber of the described unit of bleeding (7) and is communicated with.
12. vacuum air collector according to claim 11 is characterized in that: the end of the aspirating chamber inner chamber of the described unit of bleeding (7) be communicated with main aperture, the top be aspirating hole, aspirating hole is less than main aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320217763 CN203203848U (en) | 2013-04-26 | 2013-04-26 | Vacuum gas collector for core gas extraction in natural gas hydrate drilling field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320217763 CN203203848U (en) | 2013-04-26 | 2013-04-26 | Vacuum gas collector for core gas extraction in natural gas hydrate drilling field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203203848U true CN203203848U (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320217763 Expired - Fee Related CN203203848U (en) | 2013-04-26 | 2013-04-26 | Vacuum gas collector for core gas extraction in natural gas hydrate drilling field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203203848U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443698A (en) * | 2018-05-15 | 2018-08-24 | 湖南科技大学 | A kind of colliery scene coal sample gas pot |
| CN114427992A (en) * | 2020-09-30 | 2022-05-03 | 中国石油化工股份有限公司 | Device and method for extracting gas in soil |
| CN114577550A (en) * | 2020-12-01 | 2022-06-03 | 中国石油天然气股份有限公司 | Device and method for collecting top gas of rock debris tank |
-
2013
- 2013-04-26 CN CN 201320217763 patent/CN203203848U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443698A (en) * | 2018-05-15 | 2018-08-24 | 湖南科技大学 | A kind of colliery scene coal sample gas pot |
| CN108443698B (en) * | 2018-05-15 | 2024-05-17 | 湖南科技大学 | Coal sample gas tank for coal mine site |
| CN114427992A (en) * | 2020-09-30 | 2022-05-03 | 中国石油化工股份有限公司 | Device and method for extracting gas in soil |
| CN114577550A (en) * | 2020-12-01 | 2022-06-03 | 中国石油天然气股份有限公司 | Device and method for collecting top gas of rock debris tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20160426 |