CN205349319U - Gas hydrate's defeated device of pipe - Google Patents
Gas hydrate's defeated device of pipe Download PDFInfo
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- CN205349319U CN205349319U CN201620101382.1U CN201620101382U CN205349319U CN 205349319 U CN205349319 U CN 205349319U CN 201620101382 U CN201620101382 U CN 201620101382U CN 205349319 U CN205349319 U CN 205349319U
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Abstract
The utility model discloses a gas hydrate's defeated device of pipe, including shaft bottom sleeve pipe, hydraulic cyclone, ESP jar form container system, pipe -line exchange system, hydraulic cyclone, ESP jar form container system, pipe -line exchange device from the bottom up connect gradually, are fixed in in the sleeve pipe of shaft bottom, hydraulic cyclone includes swirler inlet, swirler overflow mouth, swirler cylinder, swirler centrum, underflow opening, two parts about ESP jar form container system is divide into by the partition panel are including container entry, positive displacement pump motor, vapour and liquid separator, positive displacement pump, circuit exchange system include fluid input pipeline, packer, pipe -line exchange device, gas transmission pipeline, fluid pipeline. The utility model discloses a hydraulic cyclone, ESP jar form container system, pipe -line exchange device have realized gas hydrate's solid -liquid gas three -phase separation, carry the sea with natural gas collection, and the solid phase of discharging simultaneously and liquid phase improve exploitation efficiency.
Description
Technical field
This utility model relates to ocean gas hydrate equipment field, is specifically related to the pipe conveying device of a kind of gas hydrates.
Background technology
Gas hydrates, also known as combustible ice, are the class ice-like crystalline materials formed when high pressure low temperature by natural gas and water.It is the unconventional energy resource 1m of a kind of high density, high heating value3Gas hydrates can discharge 64m3Methane gas and 0.8m3Water), gas hydrates methane content is high, and Air-pollution From Combustion is little.
Natural gas is distributed mainly in the depth of water ocean more than 300m and land permafrost band deposit, wherein ocean gas hydrate generally buries 0～1100m place below seabed, ore bed thickness several tens cm is rice up to a hundred extremely, distribution area is tens thousand of to hundreds thousand of square metres, and its stock number is more than 100 times of tundra, land.According to estimates, the total resources of whole world gas hydrates is converted into methane gas and is about 1.8～2.1 × 1016Cubic meter, is equivalent to the twice of the known coal in the whole world, oil and natural gas equal energy source gross reserves.Therefore, gas hydrates particularly ocean gas hydrate is generally considered the novel clean energy resources that will be 21 century Substitute coal, oil and natural gas, is also a kind of new forms of energy that still undeveloped reserves are maximum at present simultaneously.
As a kind of new forms of energy, a large amount of exploitations of gas hydrates and conveying are also at the exploratory stage, and one of them main difficulty is exactly, it is impossible to effectively sea bed gas hydrate is transported to ground.Exploitation of gas hydrates is generally with silt, and hydrate water content is bigger, it is easy to cause the situations such as pipeline icing, manage defeated before need three phase separation；Gas hydrates are a kind of greenhouse gases simultaneously, and its greenhouse effect is 25 times of carbon dioxide in an atmosphere, certainly will cause that global warming aggravates once reveal.Therefore need to realize sealing in managing defeated process, be strictly on guard against leakage.Because above-mentioned technological difficulties, due to the changeable of environments such as subsea and complexity, there is presently no large-scale gas hydrates business mining Practice.
Utility model content
For the problems referred to above, the purpose of this utility model is in that: in exploitation of gas hydrates process, it is provided that a kind of gas hydrates separate and conveyer device.The gas hydrates being mixed with mud are carried out solid-liquid-gas three phase separation by this device, and with different pipelines, natural gas and water are transported to sea respectively.This utility model high efficiency collection sea-bottom natural gas resource of energy, meets the extensive demand carrying sea bed gas hydrate resource.
The pipe conveying device of a kind of gas hydrates, including shaft bottom sleeve pipe, hydrocyclone, ESP (electric submersible pump) tank container system, pipe-line exchange system；Described hydrocyclone, ESP tank container system, pipe-line switch are sequentially connected with from top to bottom, are fixed in the sleeve pipe of shaft bottom；Described hydrocyclone includes cyclone inlet, cyclone overfall, cyclone cylinder, cyclone vertebral body, underflow opening；Described ESP tank container system is divided into upper and lower two parts by partition panel, ESP tank container system the latter half includes container entrance, positive displacement pump motor, ESP tank container system the first half includes gas-liquid separator, positive displacement pump, described gas-liquid separator is connected with gas-liquid separator entrance, it is arranged over gas-liquid separator steam vent, ESP tank container system wall wall top below partition panel has venthole, above ESP tank container system, wall has air vent and connects with gas-liquid separator steam vent, ESP tank container system head has refluxing opening, annular space one is formed between ESP tank container system wall and positive displacement pump motor；Described circuit switching system includes fluid input tube road, packer, pipe-line switch, gas transmission pipeline, fluid-transporting tubing, and wherein shaft bottom sleeve pipe forms annular space two with fluid input tube road；Described ESP tank container system lower end container entrance is connected with the cyclone overfall of hydrocyclone upper end by conduit, and ESP tank container system upper end is connected by the fluid input tube road of gas-liquid separator tube and tube road circuit switch.
Further, the described ESP tank container system venthole quantity that wall top has below partition panel is 3 rows, is positioned at 2～5cm place below partition panel, 3 discharge interval 5cm between pore, often discharging pore is 4, and venthole diameter is 2cm, is circumferentially distributed along ESP tank container system axle center；The air vent that above ESP tank container system, wall has is 2 axial symmetry holes, and 2, the left and right being provided above with gas-liquid separator respectively gas-liquid separator steam vent connects；ESP tank container system head has refluxing opening, is circumferentially distributed along ESP tank container system axle center, and refluxing opening Edge Distance wall edge is 0.5cm, and quantity is 8, and refluxing opening diameter is 2cm.
Further, described air vent is provided with opening check valve outwardly, it is ensured that release internal liquid, completely cuts off ambient atmos.
Further, the packer upper and lower side on described pipe-line switch is equipped with packing element, and packing element expands under the compression of packer, is in close contact compacting with shaft bottom sleeve pipe；In case natural gas or water overflow, isolation pressure promotes packer pressure below more than top pressure so that natural gas and water are delivered up simultaneously.
Further, described gas transmission pipeline and fluid-transporting tubing connect pipe-line switch axis, fluid-transporting tubing has a segment length to be that 20cm Pipe installing is in gas transmission pipeline, the caliber of the fluid-transporting tubing being arranged in gas transmission pipeline is the half of this section of gas transmission pipeline, then gas transmission pipeline separates with fluid-transporting tubing, after separation gas transmission pipeline be reduced into before caliber 60%, fluid-transporting tubing caliber remains unchanged.
Further, set tube wall in described shaft bottom is embedded with power cable.
Further, the shaft bottom casing section borehole wall at described ESP tank container system place is embedded with and adds electric heating cable, gas hydrates are heated.
In the sleeve pipe being arranged under subsea blow out preventer of the pipe conveying device of described gas hydrates, make gas hydrates mixture by passing sequentially through hydrocyclone, ESP tank container system, pipe-line switch, the underground sleeve pipe in seabed completes gas-liquid separation, isolated gas is transported to sea, and liquid is discharged into marine.
The utility model has the advantage of:
1. this utility model can carry out solid-liquid separation by being mixed with in the gas hydrates mixture of silt, obtains comparatively pure gas hydrates；
2. gas hydrates can be carried out gas-liquid separation by this utility model, and are carried respectively with different pipelines by the gas-liquid two-phase after separating, and efficient collect natural gas thus convenient；
3. this utility model simple in construction, actuating unit is few, is hardly damaged under the bad working environments of seabed, reduces maintenance replacement frequency, ensures operation seriality, saves production cost.
Accompanying drawing explanation
Fig. 1 is hydrocyclone structural representation of the present utility model；
Fig. 2 is ESP tank container system structure schematic diagram of the present utility model；
Fig. 3 is pipe-line switch structural representation of the present utility model.
In figure, 1 is cyclone inlet, and 2 is cyclone overfall, 3 is cyclone cylinder, and 4 is cyclone vertebral body, and 5 is underflow opening, 6 is shaft bottom sleeve pipe, and 8 is annular space one, and 9 is positive displacement pump motor, 10 is venthole, 11 is partition panel, and 12 is gas-liquid separator entrance, and 13 is gas-liquid separator, 14 is air vent, 15 is gas-liquid separator steam vent, and 16 is positive displacement pump, and 17 is refluxing opening, 18 is fluid input tube road, 19 is annular space two, and 20 is pipe-line switch, and 21 is packer, 22 is gas transmission pipeline, and 23 is fluid-transporting tubing.
Detailed description of the invention
Below in conjunction with the embodiment in accompanying drawing, the utility model is described in further detail, but is not intended that any restriction of the present utility model.
As shown in FIG. 1 to 3, the pipe conveying device of a kind of gas hydrates, including shaft bottom sleeve pipe 6, hydrocyclone, ESP tank container system, pipe-line exchange system；Described hydrocyclone, ESP tank container system, pipe-line switch are sequentially connected with (in figure bottom right, upper left) from top to bottom, are fixed in shaft bottom sleeve pipe 6；Described hydrocyclone includes cyclone inlet 1, cyclone overfall 2, cyclone cylinder 3, cyclone vertebral body 4, underflow opening 5；Described ESP tank container system is divided into upper and lower two parts by partition panel 11, ESP tank container system the latter half includes container entrance 7, positive displacement pump motor 9, ESP tank container system the first half includes gas-liquid separator 13, positive displacement pump 16, described gas-liquid separator 13 is connected with gas-liquid separator entrance 12, it is arranged over gas-liquid separator steam vent 15, ESP tank container system wall wall top below partition panel 11 has venthole 10, above ESP tank container system, wall has air vent 14 and connects with gas-liquid separator steam vent 15, ESP tank container system head has refluxing opening 17, annular space 1 is formed between ESP tank container system wall and positive displacement pump motor 9；Described circuit switching system includes fluid input tube road 18, packer 21, pipe-line switch 20, gas transmission pipeline 22, fluid-transporting tubing 23, and wherein shaft bottom sleeve pipe 6 and fluid input tube road 18 form annular space 2 19；Described ESP tank container system lower end container entrance 7 is connected with the cyclone overfall 2 of hydrocyclone upper end by conduit, and ESP tank container system upper end is connected by the fluid input tube road 18 of gas-liquid separator 13 tube and tube road circuit switch.
Hydrocyclone is of the present utility model to desilt equipment, the gas hydrates mixture being mixed with silt can be carried out initial gross separation, obtain comparatively pure gas hydrates solidliquid mixture；ESP tank container system is gas-liquid separation device of the present utility model, and gas hydrates mixture can be carried out natural separation and manually separate by this device, and the natural gas after separation and water is carried with different pipelines；The conveyance conduit of isolated gas and water can be exchanged by pipe-line switch, efficient collects natural gas thus convenient.
As it is shown in figure 1, hydrocyclone mainly includes cyclone inlet 1, cyclone overfall 2, cyclone cylinder 3, cyclone vertebral body 4, underflow opening 5.Hydrocyclone is centrifugal rotational flow device, relies on the density contrast of solid and liquid to carry out solid-liquid separation.Mixed liquor is tangentially conveyed into cyclone inlet 1 with certain pressure, mixed liquor pours along cyclone cylinder 3 wall and forms high speed rotating flow field at a high speed, the component that mixture Midst density is big moves axially downwards under the effect of eddy flow field, radially move simultaneously, move downward along wall arriving cyclone vertebral body 4, and discharged by underflow opening 5, material is thus formed outer whirlpool flow field；The component that density is little is moved to central axial direction, and forms interior whirlpool upwards at central axis, is delivered up to cyclone overfall 2 flowing by interior whirlpool, has thus reached the purpose separated.
As shown in Figure 2, ESP tank container system includes container entrance 7, positive displacement pump motor 9, gas-liquid separator 13, positive displacement pump 16, the two-phase laminated flow to gas hydrates can be realized, and natural gas and water are transported to sea with different pipelines, to avoid the secondary crystallization of gas hydrates.Due to the particularity of its structure, the gas hydrates fluid-mixing through removing sand for the first time can be carried out natural separation.As seen from the figure, being separated out upper and lower two parts with partition panel 11 in the middle part of this tank body, fluid can be flowed into the inside of container by the cyclone overfall 2 being connected with container bottom.The lower part inwall top of container has 3 discharge pores 10, and often discharging pore 10 quantity is 4, and two rows venthole 10 aligns, and a middle discharge pore 10 is staggered with two rows venthole 10, for the fluid flow container flowed in container；Wherein the positive displacement pump motor 9 of system is positioned at the latter half of container, and positive displacement pump motor 9 regional seal is with waterproof.Gas-liquid separator 13 is positioned at the top of the bottom packer of container the first half, and positive displacement pump 16 is positioned at the first half of gas-liquid separator, and the top of container the first half has refluxing opening 17, flows into for fluid.The operation principle of ESP tank container system is: gas hydrates fluid-mixing is flowed in container the latter half by the bottom of system, via venthole 10 flow container, flows into the annular region between ESP tank container system and marine riser and continues up flowing.When fluid up flows through the top of tank body, fluid is subject to the declines of pump herein, natural gas gas in gas hydrates fluid-mixing continues up flowing owing to density is little, and the liquid dissolved with natural gas is flowed into internal system the first half space by refluxing opening 17 under gravity, isolate natural gas soluble in water eventually through gas-liquid separator 13.Natural gas is discharged by the gas-liquid separator steam vent 15 above gas-liquid separator 13, up flows together with fluid-mixing.Water then continues up to flow by the effect of pump.Thus achieve the separation of gas hydrates.Set in shaft bottom sleeve pipe 6 pipeline section that ESP tank container system is corresponding and add electric heating cable, the process of gas hydrates conveying produces certain heat and prevents its secondary crystallization, in sleeve pipe 6 pipeline section of whole shaft bottoms, it is provided with power cable simultaneously, for positive displacement pump 16, adds electric heating cable, hydrocyclone inlet pump and other power-equipments offer power supply.
Fig. 3 is pipe-line switch system schematic, and this device mainly includes fluid input tube road 18, packer 21, pipe-line switch 20, gas transmission pipeline 22, fluid-transporting tubing 23.This device can by the collection and confinement of gases of flowing in annular space 2 19 and by gas transmission pipeline 22 to transmission on sea, current then think upper conveying by fluid-transporting tubing 23, flow into the header that throttles and are also ultimately discharged into marine.Adopt the initial outlet of coaxial pipeline designs gas transmission pipeline 22 and fluid-transporting tubing 23, its objective is the convenient cable that power supply adaptor is set on pipe-line switch 20, avoid taking more space because initial outlet adopts two lines road to discharge respectively, and adopt a plurality of cable to need to carry out respectively packing and fixing, down-hole narrow space, bad environments, be unfavorable for that construction puts in place.For guaranteeing system working stability, trace arrangements should be avoided excessively to disperse as far as possible.
Embodiment:
A kind of example process of method described in the utility model is: the gas hydrates in seabed are in stable state under environments such as subsea, and when external environment changes, gas hydrates can be decomposed into liquid and gaseous state by solid-state.The gas hydrates that seabed gathers are usually gas-liquid mixture, are generally mixed with a certain amount of silt in mixture.Gas hydrates mixture is carried out solid-liquid-gas separation by the pipe conveying device of a kind of gas hydrates described in the utility model under water, then the natural gas of separation and water is transported to sea.
First pass through decompression method and change the stable state of natural gas, gas hydrates mixture containing silt is collected and is transported to hydrocyclone, the silt in mixture is removed by centrifugal force separate, pending gas hydrates mixed liquor enters in hydrocyclone at a high speed from cyclone inlet 1, produces significantly high angular velocity.Under same angular velocity, solid and liquid produce different centrifugal intertia forces because of density contrast, and the silt that density is bigger is because being thrown toward inside cyclone vertebral body 4 wall, and gas hydrates mixture liquid that density is little and gas are then near hydrocyclone center.While silt is thrown toward inside cyclone vertebral body 4 wall, moves downward also along spiral inside cyclone vertebral body 4 wall, be finally discharged to seabed by underflow opening 5.The low pressure spiral upper upstream of formation is transferred because of the high-speed rotary of liquid in hydrocyclone center, and major part liquids and gases are delivered up by cyclone overfall 2 along with upwelling.
Gas hydrates mixture is flowed up by the effect of pipeline and ESP.Gas hydrates mixture fluid is entered the latter half of container by pipeline by the entrance 7 below ESP tank container system, this fluid annular space 1 in container continues up to flow, period fluid through positive displacement pump motor 9 strict seal of ESP system to prevent into water, it flow to the lower section of the middle packer 11 of container, by outside aperture 10 flow container that chamber wall is opened, continue up to flow in the annular space region between container outer wall and sleeve pipe.Wherein motor areas 9 produces a certain amount of heat in the course of the work, can effectively prevent the secondary crystallization of gas hydrates.The top and the bottom of container are separated by packer 11.When gas-liquid mixture flow to the top of ESP tank container system, gas in fluid-mixing continues up flowing, and liquid flows into inside ESP tank container system the first half due to the effect of gravity through the refluxing opening 17 above can container, at the internal flow down of container the first half, arrive the bottom being positioned at container the first half, enter the gas-liquid separator 13 of bottom.Through the effect of gas-liquid separator, the gas dissolved in liquid is separated, gas by air vent 14 amount discharge container on tube wall outside, air vent 14 is provided with one-way cock, prevent outside liquid from flowing into, gas after discharge up flows together with converging from the fluid of the latter half container, at mixed flow through container top, gas up flows, and liquid is according to the first half of previously described inflow container.The liquid main component separated through gas-liquid separator 13 is water, upwards transmits via the fluid line 18 of container, flows up between natural gas then annular region between fluid line 18 and shaft bottom sleeve pipe 6.The adding electric heating cable and also can produce certain heat of this external marine riser wall, it is to avoid the risk of its secondary crystallization.
Current after gas-liquid separation flow up in fluid line 18, and natural gas then enters, through process, the annular space 2 19 that outer and corresponding shaft bottom sleeve pipe 6 pipeline section of fluid line 18 is formed, and fluid line 18 is connected with a pipe-line switch 20.Exchange through pipe-line in the apparatus, by a two-dimensional current head isolated gas collected from annular space 2 19 and make its inflow gas conveyance conduit 22, being transported on deck, sea eventually through gas transmission pipeline 22 and be collected.And current are flowed up by this device incoming fluid conveyance conduit 23 and enter marine eventually through throttling header.Wherein the packer 21 on device can prevent fluid spilling in transportation, provides pressure differential, it is simple to liquid flows upwards simultaneously.
The above is only preferred implementation of the present utility model, it is noted that this utility model is not limited to aforesaid way, and under the premise without departing from this utility model principle, moreover it is possible to improve further, these improvement also should be regarded as protection domain of the present utility model.
Claims (7)
1. the pipe conveying device of gas hydrates, it is characterised in that include shaft bottom sleeve pipe (6), hydrocyclone, ESP tank container system, pipe-line exchange system；Described hydrocyclone, ESP tank container system, pipe-line switch are sequentially connected with from top to bottom, are fixed in shaft bottom sleeve pipe (6)；Described hydrocyclone includes cyclone inlet (1), cyclone overfall (2), cyclone cylinder (3), cyclone vertebral body (4), underflow opening (5)；Described ESP tank container system is divided into upper and lower two parts by partition panel (11), ESP tank container system the latter half includes container entrance (7), positive displacement pump motor (9), ESP tank container system the first half includes gas-liquid separator (13), positive displacement pump (16), described gas-liquid separator (13) is connected with gas-liquid separator entrance (12), it is arranged over gas-liquid separator steam vent (15), ESP tank container system wall has venthole (10) on wall top, partition panel (11) lower section, above ESP tank container system, wall has air vent (14) and connects with gas-liquid separator steam vent (15), ESP tank container system head has refluxing opening (17), annular space one (8) is formed between ESP tank container system wall and positive displacement pump motor (9)；Described circuit switching system includes fluid input tube road (18), packer (21), pipe-line switch (20), gas transmission pipeline (22), fluid-transporting tubing (23), and wherein shaft bottom sleeve pipe (6) forms annular space two (19) with fluid input tube road (18)；Described ESP tank container system lower end container entrance (7) is connected with the cyclone overfall (2) of hydrocyclone upper end by conduit, and ESP tank container system upper end is connected by the fluid input tube road (18) of gas-liquid separator (13) tube and tube road circuit switch.
2. the pipe conveying device of a kind of gas hydrates as claimed in claim 1, it is characterized in that, venthole (10) quantity that described ESP tank container system has on wall top, partition panel (11) lower section is 3 rows, it is positioned at 2～5cm place below partition panel, 3 discharge interval 5cm between pore (10), often discharging pore is 4, and venthole diameter is 2cm, is circumferentially distributed along ESP tank container system axle center；The air vent (14) that above ESP tank container system, wall has is 2 axial symmetry holes, and 2, the left and right being provided above with gas-liquid separator (13) respectively gas-liquid separator steam vent (15) connects；ESP tank container system head has refluxing opening (17), is circumferentially distributed along ESP tank container system axle center, and refluxing opening Edge Distance wall edge is 0.5cm, and refluxing opening quantity is 8, and refluxing opening diameter is 2cm.
3. the pipe conveying device of a kind of gas hydrates as claimed in claim 2, it is characterised in that described air vent (14) is provided with opening check valve outwardly.
4. the pipe conveying device of a kind of gas hydrates as claimed in claim 1, it is characterized in that, packer (21) upper and lower side on described pipe-line switch (20) is equipped with packing element, packing element expands under the compression of packer (21), is in close contact compacting with shaft bottom sleeve pipe (6).
5. the pipe conveying device of a kind of gas hydrates as claimed in claim 1, it is characterized in that, described gas transmission pipeline (22) and fluid-transporting tubing (23) connect pipe-line switch (20) axis, the Pipe installing that fluid-transporting tubing (23) has a segment length to be 20cm is in gas transmission pipeline (22), the half that caliber is this section of gas transmission pipeline (22) of the fluid-transporting tubing (23) being arranged in gas transmission pipeline (22), then gas transmission pipeline (22) and fluid-transporting tubing (23) separate, after separation gas transmission pipeline (22) be reduced into before caliber 60%, fluid-transporting tubing (23) caliber remains unchanged.
6. the pipe conveying device of a kind of gas hydrates as claimed in claim 1, it is characterised in that be embedded with power cable in sleeve pipe (6) tube wall of described shaft bottom.
7. the pipe conveying device of a kind of gas hydrates as claimed in claim 1, it is characterised in that be embedded with in shaft bottom sleeve pipe (6) the section borehole wall at described ESP tank container system place and add electric heating cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620101382.1U CN205349319U (en) | 2016-01-29 | 2016-01-29 | Gas hydrate's defeated device of pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620101382.1U CN205349319U (en) | 2016-01-29 | 2016-01-29 | Gas hydrate's defeated device of pipe |
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| Publication Number | Publication Date |
|---|---|
| CN205349319U true CN205349319U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620101382.1U Withdrawn - After Issue CN205349319U (en) | 2016-01-29 | 2016-01-29 | Gas hydrate's defeated device of pipe |
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| CN (1) | CN205349319U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545279A (en) * | 2016-01-29 | 2016-05-04 | 西南石油大学 | Pipe conveying device of natural gas hydrate |
| CN107542431A (en) * | 2017-01-11 | 2018-01-05 | 西南石油大学 | A kind of method of gas hydrates seabed gas-liquid-solid multiphase flowization separation |
| CN108331572A (en) * | 2018-01-12 | 2018-07-27 | 中国石油大学(北京) | Gas-liquid separation re-injection oil extraction system and its method under Horizontal Well |
-
2016
- 2016-01-29 CN CN201620101382.1U patent/CN205349319U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545279A (en) * | 2016-01-29 | 2016-05-04 | 西南石油大学 | Pipe conveying device of natural gas hydrate |
| CN107542431A (en) * | 2017-01-11 | 2018-01-05 | 西南石油大学 | A kind of method of gas hydrates seabed gas-liquid-solid multiphase flowization separation |
| CN107542431B (en) * | 2017-01-11 | 2020-02-07 | 西南石油大学 | Method for gas-liquid-solid multiphase fluidization separation of natural gas hydrate on seabed |
| CN108331572A (en) * | 2018-01-12 | 2018-07-27 | 中国石油大学(北京) | Gas-liquid separation re-injection oil extraction system and its method under Horizontal Well |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160629 Effective date of abandoning: 20180821 |
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| AV01 | Patent right actively abandoned |