CN203203844U

CN203203844U - Gas collection device for core gas of natural gas hydrate drilling site

Info

Publication number: CN203203844U
Application number: CN 201320218118
Authority: CN
Inventors: 赵省民; 邓坚; 饶竹; 陆程; 苗忠英; 刘晨
Original assignee: CHINA GEOLOGICAL SURVEY OIL GAS RESOURCE SURVEY CENTER
Current assignee: CHINA GEOLOGICAL SURVEY OIL GAS RESOURCE SURVEY CENTER
Priority date: 2013-04-26
Filing date: 2013-04-26
Publication date: 2013-09-18
Anticipated expiration: 2023-04-26

Abstract

The utility model provides a gas collection device for the core gas of a natural gas hydrate drilling site, which comprises a gas collection tank and a gas collection bottle, wherein the upper part of the gas collection tank is provided with a gas gathering structure with a reducing inner diameter, and the top is connected with a gas collection conduit; a gas collection conduit switch and a bracket are arranged at the lower part of the gas collection conduit; in a gas collection process, an opening of the gas collection bottle is buckled on the gas collection conduit, and the gas collection conduit extends into the bottle body; the shoulder and/or opening of the gas collection bottle is supported on the bracket; and meanwhile, a clearance is reserved between the opening of the gas collection bottle and the gas collection conduit. The gas collection device provided by the utility model has the advantages of good material, convenience in operation, high working efficiency, good quality of the collected gas sample and the like.

Description

A kind of gas hydrate are drilled the gas extractor of on-the-spot rock core gas

Technical field

The utility model relates to the gas collecting field, relates to the gas extractor 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 the on-the-spot gas extractor of hydrate drilling well rock core is the collection of probing gas on-site, measurement and then the important foundation equipment of declaring the knowledge hydrate fast.

Through literature search, at present domestic and international gas hydrate drilling well rock core gas collection method mainly contains the static headspace gas method and leaves standstill degassing method.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 ℃, 5 minutes high speed machine of row vibration is again got a certain amount of container top space gas then and is carried out hydrocarbon composition and isotope analysis.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.

All there are shortcomings such as complex structure, operation inconvenience, gas collection be of poor quality in used rock core gas gas extractor in above-mentioned two kinds of methods, cause to rock core gas gatherer process complexity, inefficiency, to get the makings amount relatively poor.

Summary of the invention

The utility model is for overcoming above-mentioned deficiency of the prior art, provide a cover to can be used in the gas extractor that gas hydrate are drilled hydrocarbon gas in the on-the-spot rock core, this gas extractor possesses that material is good, easy and simple to handle, high efficiency and the measured advantage of collection gaseous sample matter.

Concrete technical scheme of the present utility model is as follows:

A kind of gas hydrate are drilled the gas extractor of on-the-spot rock core gas, comprise air collector 1 and gas bottle 5, the gas that described air collector 1 top has the internal diameter contraction compiles structure, and be connected with gas collection conduit 4 at the top, be provided with gas collection catheter switch 2 in the bottom of described gas collection conduit 4, gas collection conduit outer wall on the described gas collection catheter switch is provided with carriage 3, in the gas collection process, the bottleneck of described gas bottle 5 buckles and is connected on the gas collection conduit 4, and make gas collection conduit 4 extend into bottle inside, the shoulder of gas bottle 5 and/or bottleneck are supported on the described carriage 3, leave the gap between the bottleneck of gas bottle 5 and the described gas collection conduit 4 simultaneously.

Further according to gas extractor described in the utility model, it is round table-like structure that the gas on wherein said air collector 1 top compiles structure, and described gas collection conduit 4 is round tube shape structure, and one is connected in the round platform top.

Further according to gas extractor described in the utility model, wherein said gas collection catheter switch 2 is arranged at the junction of described gas collection conduit 4 and round platform, described carriage 3 is provided with fixed screw 3-1, and fixed screw 3-1 is fixed in the sidewall of gas bottle 5 described in the gas collection process.

Further according to gas extractor described in the utility model, wherein said air collector 1 comprises tank body 1-1 and Cap for tin body 1-2, described tank body 1-1 is the core structure of upper end open, lower end closed, described Cap for tin body 1-2 is detachable gas collection and the gas operated device that is sleeved on tank body 1-1 openend, and is connected by O-ring seal 1-4 and tank body 1-1 formation sliding sealing.

Further according to gas extractor described in the utility model, the openend outer wall of wherein said tank body 1-1 is provided with O-ring seal draw-in groove 1-3 circumferential more than two, is embedded with described O-ring seal 1-4 at each O-ring seal draw-in groove 1-3.

Further according to gas extractor described in the utility model, wherein said Cap for tin body 1-2 bottom is that cylindric, middle part is that round table-like, top is the pipe shape, Cap for tin body 1-2 bottom cylinder inner wall slightly larger in diameter is in tank body 1-1 openend outer diameter, Cap for tin body 1-2 middle part round platform inner wall smooth, Cap for tin body 1-2 top pipe is as described gas collection conduit 4.

At least can reach following technique effect by rock core gas gas extractor described in the utility model:

1, material is good

(1) the 1 used material of the air collector in the device described in the utility model is stainless steel, and inside surface is smooth, and is both wear-resistant durable, anticorrosive again, can also avoid rock core to discharge the pollution of gas.

2, easy and simple to handle

(1) device described in the utility model is before getting gas with air collector 1, sample is put into, capping makes things convenient for, after the hydrate core sample of gas to be collected directly put into air collector tank body 1-1, Cap for tin body 1-2 is enclosed within the tank body openend to be pressed gently and gets final product capping, easy to operate, having filled up this area does not still have the blank of this type of device, has overcome the deficiency of near field similar device complicated operation yet;

(2) device described in the utility model get gas, the gas collection process is simple and convenient.After sample is put into air collector tank body 1-1 and is used Cap for tin body 1-2 capping, under water gas bottle is inverted and is enclosed within on the gas collection conduit 3, namely begun to get gas after fixing, after getting depressed bundle, under water gas bottle is tightened sealing and can be sent to the field experiment chamber and directly test or put into cold compartment of refrigerator and deposit, easy to operate.Avoided penetrating air collector with syringe and extracted, the complicated processes of the special-purpose gas bottle that reinjects has also been avoided sneaking into of air in the transposition process, has improved the quality of gathering gaseous sample.

3, high efficiency

(1) air collector 1 in the device described in the utility model pack into, during the capping core sample, simple to operate easily, intermediate link is few, has improved the packaging efficiency of gas production sample;

(2) sample in the air collector 1 in the device described in the utility model is when discharging gas, and special-purpose gas bottle has namely begun water pumping gas production, outgases and gets gas and carry out simultaneously, has overcome existingly to get serial pilot process such as gas, transposition, has improved and has got gas efficient;

(3) innovation structure of air collector is conducive to accelerate the speed that hydrate core sample in the air collector 1 discharges gas in the device described in the utility model, also can promote the gas that adsorbs on air collector 1 inwall to be pooled to gas collection conduit 4, guarantee the gas collection completely;

(4) to gas collecting, once finish, and simplified a series of pilot process, improved gas collecting efficient greatly by whole process from packaged water compound core sample, release gas for device described in the utility model.

Description of drawings

Fig. 1 drills the structural representation of the gas extractor of on-the-spot rock core gas for gas hydrate described in the utility model;

Fig. 2 drills the gas collection process synoptic diagram of on-the-spot rock core gas gas extractor for gas hydrate described in the utility model;

Fig. 3 drills the preferred structure synoptic diagram of air collector in the on-the-spot rock core gas gas extractor for gas hydrate described in the utility model;

The implication of each Reference numeral is as follows among the figure:

1 is that air collector: 1-1 is that tank body, 1-2 are that Cap for tin body, 1-3 are that O-ring seal draw-in groove, 1-4 are O-ring seal;

2 is the gas collection catheter switch;

3 is that carriage, 3-1 are fixed screw;

4 is the gas collection conduit;

5 is gas bottle.

Embodiment

The gas extractor of gas hydrate described in the utility model being drilled on-the-spot rock core gas below in conjunction with accompanying drawing is described in detail; so that those skilled in the art can clearer understanding scheme of the present utility model, but therefore do not limit protection domain of the present utility model.

As shown in Figure 1, the gas hydrate described in the utility model gas extractor of drilling hydrocarbon gas in the on-the-spot rock core comprises air collector 1 and gas bottle 5.As shown in Figure 1, core sample is equipped with in described air collector 1 bottom, shown in dotted line in the accompanying drawing 1, top is round table-like structure, so that compile the gas that the inner sample rock core discharges, the top of round platform is connected with the gas collection conduit 4 of pipe shape, be used for the rock core gas of gathering is outwards derived, described gas collection conduit 4 also can be integrally formed with described air collector, part as air collector 1, the intersection that compiles portion at described pipe shape gas collection conduit 4 and round platform is provided with gas collection catheter switch 2, described gas collection catheter switch is used for control collection rock core gas to be passed through through the gas collection conduit, the gas collection conduit outer wall of gas collection catheter switch top is provided with the carriage 3 more than three, described carriage is used for support set gas cylinder 5, and comprise fixed screw 3-1, described gas bottle 5 bottleneck buckle in the gas collection process places on the gas collection conduit 4, make gas collection conduit 4 extend into bottle inside, gas bottle 5 shoulders and bottleneck are supported on the carriage 3 simultaneously, fixed screw 3-1 is fixed in the sidewall of gas bottle, leave the gap between gas bottle bottleneck and the gas collection conduit 4, as shown in Figure 2 concrete.All be immersed in the saturated brine at air collector described in the gas collection process and gas bottle, and finish the installation of above-mentioned gas bottle under water, with abundant discharge inner air, improve rock core gas and collect quality.

Air collector 1 described in the utility model further preferably can possess structure as shown in Figure 3, it comprises tank body 1-1 and Cap for tin body 1-2, described tank body 1-1 is the core structure of upper end open, lower end closed, and openend is used for putting into core sample and injects saturated brine; The openend outer wall is provided with more than two, be preferably three circumferential O-ring seal draw-in groove 1-3, in each described O-ring seal draw-in groove 1-3, O-ring seal 1-4 is arranged fixedly, described O-ring seal 1-4 preferably adopts rubber seal, and is fixed in the described O-ring seal draw-in groove 1-3 with embedded mode.Described Cap for tin body 1-2 is detachable gas collection and the gas operated device that is sleeved on tank body 1-1 openend, enters special-purpose gas bottle for the gas that compiles the release of hydrate rock core; Cap for tin body 1-2 forms being tightly connected of sliding by rubber seal 1-4 and tank body 1-1, in case gas leaks outside from the junction, concrete described Cap for tin body 1-2 bottom is cylindric, the middle part is round table-like, top is the pipe shape, Cap for tin body 1-2 bottom cylinder inner wall slightly larger in diameter is in tank body 1-1 openend outer diameter, guarantee that Cap for tin body 1-2 can easily be enclosed within on the tank body 1-1, and to the formation of the O-ring seal on tank body crush seal, Cap for tin body 1-2 middle part is round table-like, being beneficial to gas compiles and enters top gas collection conduit 4, this part inwall requires smooth, to reduce the gas flow of sorption on inwall, Cap for tin body 1-2 top pipe is directly as gas collection conduit 4, this gas collection conduit 4 is connected in the outside gas bottle 5 of gathering gas, be used for tank body 1-1 is discharged, the gas that compiles among the Cap for tin body 1-2 all imports the gas bottle 5 of collecting gas, be provided with gas collection catheter switch 2 in described gas collection conduit 4 bottoms, gas collection conduit outer wall above described gas collection catheter switch is provided with three with bracket 3, be used for the button card and collect the special-purpose gas bottle 5 of gas, the position of described carriage 3 should be stretched into the gas bottle bottleneck and is advisable to satisfy gas collection conduit 4, simultaneously be provided with fixed screw 3-1 at described carriage sidepiece, be used for the fixing gas bottle 5 that is connected with gas collection conduit 4, avoid gas bottle floating in the gas collection process, crooked, described gas collection conduit 4 stretches between gas bottle 5 inside and its outer wall and gas bottle bottleneck inwall and leaves the gap, as shown in Figure 2.Gas extractor in this improvement embodiment works in the saturated brine in the gas collection process equally, be about to drill the tank body 1-1 that puts into air collector after the core sample that takes out cleans, and the tank body 1-1 that sample will be housed is positioned in the saturated brine, allow and be full of saturated brine in the tank body 1-1 to get rid of inner air, then the Cap for tin body 1-2 with air collector 1 also is immersed in the saturated brine fully, fully discharge inner air, under water Cap for tin body 1-2 is buckled on tank body 1-1 then, select the gas bottle of suitable size to put into saturated brine at last, it is full of saturated brine, discharge air, and on the gas collection conduit 4 that below the saturated brine water surface gas bottle is buckled on Cap for tin body 1-2, and place on the gas bottle carriage 3, tighten fixed screw 3-1, guarantee that gas bottle can not drift about or topple over, and begins to get gas.

Can realize core sample is discharged the thorough collection of gas like this by gas extractor described in the utility model, the gas of described air collector compiles structure and is beneficial to the collection of converging that rock core discharges gas, gas bottle is very easy in the supravasal installation set-up mode operation of gas collection, be convenient to the collection of gas with to the replacing of gas bottle, having filled up this area does not still have the blank of this type of device, also overcome the deficiency of near field similar device complicated operation, improved gas collecting efficient greatly.

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

1. gas hydrate are drilled the gas extractor of on-the-spot rock core gas, it is characterized in that, comprise air collector (1) and gas bottle (5), the gas that described air collector (1) top has the internal diameter contraction compiles structure, and be connected with gas collection conduit (4) at the top, be provided with gas collection catheter switch (2) in the bottom of described gas collection conduit (4), gas collection conduit outer wall on the described gas collection catheter switch is provided with carriage (3), in the gas collection process, the bottleneck of described gas bottle (5) buckles and is connected on the gas collection conduit (4), and make gas collection conduit (4) extend into bottle inside, the shoulder of gas bottle (5) and/or bottleneck are supported on the described carriage (3), leave the gap between the bottleneck of gas bottle (5) and the described gas collection conduit (4) simultaneously.

2. gas extractor according to claim 1 is characterized in that, it is round table-like structure that the gas on wherein said air collector (1) top compiles structure, and described gas collection conduit (4) is round tube shape structure, and one is connected in the round platform top.

3. gas extractor according to claim 2, it is characterized in that, described gas collection catheter switch (2) is arranged at the junction of described gas collection conduit (4) and round platform, described carriage (3) is provided with fixed screw (3-1), and fixed screw described in the gas collection process (3-1) is fixed in the sidewall of gas bottle (5).

4. according to each described gas extractor of claim 1-3, it is characterized in that, described air collector (1) comprises tank body (1-1) and Cap for tin body (1-2), described tank body (1-1) is the core structure of upper end open, lower end closed, described Cap for tin body (1-2) is detachable gas collection and the gas operated device that is sleeved on tank body (1-1) openend, and is connected by O-ring seal (1-4) and tank body (1-1) formation sliding sealing.

5. gas extractor according to claim 4 is characterized in that, the openend outer wall of wherein said tank body (1-1) is provided with O-ring seal draw-in groove (1-3) circumferential more than two, is embedded with described O-ring seal (1-4) at each O-ring seal draw-in groove (1-3).

6. gas extractor according to claim 5, it is characterized in that, wherein said Cap for tin body (1-2) bottom is that cylindric, middle part is that round table-like, top is the pipe shape, Cap for tin body (1-2) bottom cylinder inner wall slightly larger in diameter is in tank body (1-1) openend outer diameter, Cap for tin body (1-2) middle part round platform inner wall smooth, Cap for tin body (1-2) top pipe is as described gas collection conduit (4).