CN113153235A - Underground hydraulic breaking, recovering and separating device for natural gas hydrate - Google Patents
Underground hydraulic breaking, recovering and separating device for natural gas hydrate Download PDFInfo
- Publication number
- CN113153235A CN113153235A CN202110471734.8A CN202110471734A CN113153235A CN 113153235 A CN113153235 A CN 113153235A CN 202110471734 A CN202110471734 A CN 202110471734A CN 113153235 A CN113153235 A CN 113153235A
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- China
- Prior art keywords
- natural gas
- spiral
- hydrate
- separation
- gas hydrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 45
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 238000005553 drilling Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 238000011065 in-situ storage Methods 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- 230000003628 erosive effect Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract 1
- 239000007790 solid phase Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 4
- -1 natural gas hydrates Chemical class 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XURIQWBLYMJSLS-UHFFFAOYSA-N 1,4,7,10-tetrazacyclododecan-2-one Chemical compound O=C1CNCCNCCNCCN1 XURIQWBLYMJSLS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0007—Equipment or details not covered by groups E21B15/00 - E21B40/00 for underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
- E21B7/185—Drilling by liquid or gas jets, with or without entrained pellets underwater
Abstract
The invention discloses a natural gas hydrate underground hydraulic breaking, recovering and separating device, which relates to the field of petroleum and natural gas hydrate development and comprises the following components: a hydraulic spiral separation part, an internal and external fluid conversion device and a tubular cyclone separation device. The upper end and the lower end of the invention are connected with a drill rod, the upper end of a spiral separation part is connected with an inner fluid conversion device and an outer fluid conversion device, and the upper end of the inner fluid conversion device and the upper end of the outer fluid conversion device are connected with a pipe type spiral separation device. The invention can realize secondary crushing and gel breaking of solid-phase particles of the hydrate by using the principle of spiral and cyclone separation coupling, can also realize underground in-situ real-time multiple separation and backfilling of high-sand-content mixed fluid in conventional petroleum or hydrate recovery, and better solves the problem that the high-sand-content hydrate causes serious erosion and blockage to equipment and the like in the process of underground mixed fluid recovery.
Description
Technical Field
The invention relates to the field of development of petroleum and natural gas hydrates, in particular to a natural gas hydrate underground hydraulic breaking, recovering and separating device.
Background
Natural gas hydrate (hereinafter referred to as hydrate) is a novel 'clean energy' which has the characteristics of high density, wide distribution, shallow burial and large scale and can be generated under specific temperature and pressure. Under the theoretical standard state, the gas hydrate of 1m3 can release 164m 3 of methane gas, which is of great interest due to its huge energy, but these characteristics also bring potential danger and new technical requirements to the hydrate development process. Most of the existing natural gas hydrates have the characteristics of shallow buried depth, weak cementation, instability, no compact cover layer, high sand content (mainly micron-sized superfine-fine-grain silt and medium-coarse-grain silt) and cross-scale and micron-sized superfine grain, and the like, while in various development modes of the existing natural gas hydrates, such as a depressurization method, a heat injection method, a solid fluidization exploitation method and the like, the problems of low pipe transportation efficiency, poor continuous productivity, goaf reservoir collapse, equipment blockage, abrasion and other production economic efficiency, engineering geological risks, equipment failure and the like caused by large sand output are seriously hindered, the development of related technologies and equipment for marine natural gas hydrate exploitation is seriously hindered, and even becomes a fort which must be broken through for realizing commercial hydrate exploitation, and the problems faced by the existing hydrate exploitation are as follows:
(1) massive silt mixed solids may exist in the process of exploiting the hydrate, and the existing separation device does not consider secondary crushing of the hydrate;
(2) the existing seabed hydrate desanding device has a complex structure, and has low fault tolerance rate and poor reliability in the deep-sea hydrate separation process;
(3) in the actual exploitation process, a large blocky hydrate sediment mixture often exists after a drill bit or jet flow breaks a hydrate layer, so that a flow channel is easy to block;
in summary, in order to solve the problem of serious sand production in the current natural gas hydrate exploitation, an underground silt separator capable of realizing hydrate breaking cementation is needed to realize underground in-situ real-time separation and backfill of high-sand-containing mixed fluid in the conventional hydrate recovery process.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the underground hydraulic breaking, recovering and separating device for the natural gas hydrate can realize underground real-time separation and backfilling of the natural gas hydrate, can reduce pump output power required by lifting of a return product, saves energy consumption, improves yield, can realize gel breaking of the hydrate, can avoid erosion, abrasion and blockage of silt to a conveying pipeline, and can directly backfill the separated silt to a goaf underground.
The invention is realized by the following technical scheme:
the utility model provides a natural gas hydrate is broken recovery separator in pit which characterized in that: comprises a spiral separation part, an internal and external fluid conversion device and a tubular cyclone separation device; the spiral separation part consists of an inner pipe lower sealing plug, a bearing group I, a spiral crushing reamer and a spiral crushing shell; the inner and outer fluid conversion devices are arranged at the upper end of the spiral separation part; the tubular cyclone separation device comprises a cyclone separation shell, a centering ring, a cyclone separation inner tube, a cyclone separator, a bearing group II, a hydraulic helical blade and a shaft end fixing joint.
The spiral crushing reamer is characterized in that: the center channel is a drilling fluid channel, the outer layer is a spiral blade, a spiral groove is machined in the spiral crushing reamer and used for assembling a hydraulic spiral blade, and the middle part is a power fluid channel I.
The spiral crushing shell is characterized in that: the surface of the shell is provided with a hydrate suction inlet I.
The inner and outer fluid conversion devices are internally provided with a conversion channel I and a conversion channel II, and the inner and outer fluid conversion devices are provided with a taper thread male buckle I, a taper thread female buckle and a flat buckle thread.
And the upper part of the shaft end fixed joint is provided with a conical thread male buckle II, and the middle part of the shaft end fixed joint is provided with a power fluid channel II.
In summary, the underground hydraulic fracture recovery separation device for natural gas hydrates in the embodiment of the invention has at least the following beneficial effects:
in the aspect of natural gas hydrate exploitation:
(1) the spiral crushing reamer is arranged to realize secondary crushing of large-block-shaped mud-sand mixed solids;
(2) the invention is suitable for a solid fluidization exploitation process, has no complex mechanical structure, realizes the integration of hydraulic drive and a crushing reamer, is suitable for the severe environment of deep sea, and has simple and reliable separation mode.
(3) The weak cementation bond between the solid particles of the hydrate and the silt particles is broken by adopting the spiral-cyclone coupling principle, so that the cementation breaking of the hydrate is realized, the separation of the cross-scale micron-sized particles of the mixed slurry of the natural gas hydrate can be realized, the cleanliness of the slurry of the returned hydrate is improved, and the effect of improving the productivity is achieved;
the invention utilizes the reamer for secondary crushing, discharges the silt in situ after desanding, reduces the conveying capacity of the vertical pipe, reduces the erosion abrasion and blockage of the silt to the shaft, equipment and the like, and backfills the silt separated in situ in time to prevent breaking the dynamic balance of the hydrate reservoir and prevent collapse accidents during oil extraction.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the present invention spiral crushing reamer;
FIG. 3 is a schematic view of the internal and external fluid transfer device of the present invention;
FIG. 4 is a three-dimensional view of a hydraulic helical blade according to the present invention;
fig. 5 is a schematic view of the shaft end fixing joint of the present invention.
1-inner tube lower sealing plug, 2-bearing group I, 3-spiral crushing reamer, 4-spiral crushing shell, 5-inner and outer fluid conversion device, 6-cyclone separation shell, 7-centering ring, 8-cyclone separation inner tube, 9-cyclone separator, 10-bearing group II, 11-hydraulic helical blade, 12-shaft end fixed joint and 301-drilling fluid channel, 302-helical blade, 303-helical groove, 304-power fluid channel I, 4-helical crushing shell, 401-hydrate suction inlet I, 501-conversion channel I, 502-conversion channel, 503-II taper thread pin I, 504-taper thread box, 505-flat thread, 1201-taper thread pin II and 1202-power fluid channel II.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1 to 5, a natural gas hydrate underground hydraulic fracture recovery separation device is characterized in that: comprises a spiral separation part, an internal and external fluid conversion device and a tubular cyclone separation device; the spiral separation part consists of an inner pipe lower sealing plug 1, a bearing group I2, a spiral crushing reamer 3 and a spiral crushing shell 4; the inner and outer fluid conversion devices 5 are arranged at the upper end of the spiral separation part; the tubular cyclone separation device comprises a cyclone separation shell 6, a centering ring 7, a cyclone separation inner tube 8, a cyclone separator 9, a bearing group II 10, a hydraulic helical blade 11 and a shaft end fixing joint 12. The spiral crushing reamer 3 is characterized in that: the center channel is a drilling fluid channel 301, the outer layer is a spiral blade 302, a spiral groove 303 for assembling a hydraulic spiral blade 11 is processed in the spiral crushing reamer 3, and the middle part is a power fluid channel I304. The spiral crushing shell 4 is characterized in that: the shell surface is provided with a hydrate suction port I401. The inner fluid conversion device 5 and the outer fluid conversion device 5 are internally provided with a conversion channel I501 and a conversion channel II 502, and the inner fluid conversion device 5 and the outer fluid conversion device are provided with a taper thread male buckle I503, a taper thread female buckle 504 and a flat buckle thread 505. The upper part of the shaft end fixed joint 12 is provided with a taper thread male buckle II 1201, and the middle part is provided with a power fluid channel II 1202.
The working process of the invention is as follows:
the process of driving the spiral crushing reamer by power liquid:
power liquid is injected from the annular space of the upper cyclone separation shell 6 and the cyclone separation inner tube 8, passes through the inner fluid conversion device and the outer fluid conversion device 5, enters the conversion channel II 502, enters the spiral crushing reamer 3, drives the hydraulic spiral blade 11, and further drives the spiral crushing reamer 3 to rotate so as to crush blocky silt or hydrate. The power fluid finally flows through the inside of the shaft end fixed joint 12 and continues to flow downwards.
The separation process of the natural gas hydrate comprises the following steps:
the natural gas hydrate mud-sand mixed liquid (hereinafter referred to as produced liquid) enters from the suction inlet and enters the spiral crushing shell 4. The produced liquid is crushed by the spiral crushing reamer 3, large-block-shaped silt is crushed into fine particles, and the spiral crushing reamer 3 plays a role in breaking cementation on the natural gas hydrate due to the centrifugal force. The produced liquid enters the cyclone separation inner pipe 8 through the conversion channel I501, the silt is directly discharged to the sea through the separation effect of the cyclone separator 9, and the separated produced liquid continues to flow upwards.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (5)
1. The utility model provides a natural gas hydrate is broken to retrieve separator in pit which characterized in that includes: the spiral separation part, the internal and external fluid conversion device and the tubular cyclone separation device; the spiral separation part consists of an inner pipe lower part sealing plug (1), a bearing group I (2), a spiral crushing reamer (3) and a spiral crushing shell (4); the inner and outer fluid conversion devices (5) are arranged at the upper end of the spiral separation part; the tubular cyclone separation device is composed of a cyclone separation shell (6), a centering ring (7), a cyclone separation inner tube (8), a cyclone separator (9), a bearing group II (10), a hydraulic helical blade (11) and a shaft end fixed joint (12).
2. The natural gas hydrate underground hydraulic fracturing recovery separation device as claimed in claim 1, wherein the central channel is a drilling fluid channel (301), the outer layer is a helical blade (302), a helical groove (303) is machined in the helical fracturing reamer (3) for assembling the hydraulic helical blade (11), and the middle part is a power fluid channel I (304).
3. A natural gas hydrate downhole hydraulic fracturing recovery separation device as claimed in claim 1, wherein the housing surface has a hydrate suction inlet i (401).
4. A natural gas hydrate downhole hydraulic fracturing, recovery and separation device according to claim 1, wherein the inner and outer fluid conversion device (5) is internally provided with a conversion channel i (501) and a conversion channel ii (502), and the inner and outer fluid conversion device (5) is provided with a taper thread male buckle i (503), a taper thread female buckle (504) and a flat thread (505).
5. The natural gas hydrate underground hydraulic fracturing, recovering and separating device as claimed in claim 1, wherein the upper part of the shaft end fixing joint (12) is provided with a taper thread male buckle II (1201), and the middle part is provided with a power fluid channel II (1202).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471734.8A CN113153235B (en) | 2021-04-29 | 2021-04-29 | Underground hydraulic breaking, recovering and separating device for natural gas hydrate |
| US17/676,250 US11746640B2 (en) | 2021-04-28 | 2022-02-21 | Solid fluidization tubular separator for marine natural gas hydrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471734.8A CN113153235B (en) | 2021-04-29 | 2021-04-29 | Underground hydraulic breaking, recovering and separating device for natural gas hydrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113153235A true CN113153235A (en) | 2021-07-23 |
| CN113153235B CN113153235B (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110471734.8A Expired - Fee Related CN113153235B (en) | 2021-04-28 | 2021-04-29 | Underground hydraulic breaking, recovering and separating device for natural gas hydrate |
Country Status (1)
| Country | Link |
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| CN (1) | CN113153235B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687710A (en) * | 2022-03-30 | 2022-07-01 | 西南石油大学 | High-efficient separation degritting backfill device of thermal decomposition under water |
| CN115492566A (en) * | 2022-10-24 | 2022-12-20 | 宜宾学院 | Device for realizing multistage hydrate in-situ separation and desanding through series-parallel combination |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283204B1 (en) * | 1999-09-10 | 2001-09-04 | Atlantic Richfield Company | Oil and gas production with downhole separation and reinjection of gas |
| US6564865B1 (en) * | 2001-12-19 | 2003-05-20 | Conocophillips Company | Oil and gas production with downhole separation and reinjection of gas |
| CN105665097A (en) * | 2016-03-08 | 2016-06-15 | 西南石油大学 | Rotary secondary crushing device and rotary secondary crushing method for natural gas hydrate |
| CN207278193U (en) * | 2017-09-20 | 2018-04-27 | 中国石油大学(北京) | drill bit |
| CN108222894A (en) * | 2018-03-09 | 2018-06-29 | 西南石油大学 | It is a kind of to melt the silt particle backfilling apparatus adopted for gas hydrates time tractive current |
| CN110206527A (en) * | 2019-01-04 | 2019-09-06 | 西南石油大学 | A kind of high throughput hydrate underground separation shunting means using spiral separator |
| CN112523739A (en) * | 2020-12-28 | 2021-03-19 | 西南石油大学 | Underground hydraulic drive spiral-cyclone coupling tube separator |
| CN112593859A (en) * | 2020-11-08 | 2021-04-02 | 张新华 | Concentric double-shaft rotary type earth and stone square drilling and digging device for building construction |
-
2021
- 2021-04-29 CN CN202110471734.8A patent/CN113153235B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283204B1 (en) * | 1999-09-10 | 2001-09-04 | Atlantic Richfield Company | Oil and gas production with downhole separation and reinjection of gas |
| US6564865B1 (en) * | 2001-12-19 | 2003-05-20 | Conocophillips Company | Oil and gas production with downhole separation and reinjection of gas |
| CN105665097A (en) * | 2016-03-08 | 2016-06-15 | 西南石油大学 | Rotary secondary crushing device and rotary secondary crushing method for natural gas hydrate |
| CN207278193U (en) * | 2017-09-20 | 2018-04-27 | 中国石油大学(北京) | drill bit |
| CN108222894A (en) * | 2018-03-09 | 2018-06-29 | 西南石油大学 | It is a kind of to melt the silt particle backfilling apparatus adopted for gas hydrates time tractive current |
| CN110206527A (en) * | 2019-01-04 | 2019-09-06 | 西南石油大学 | A kind of high throughput hydrate underground separation shunting means using spiral separator |
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| CN112523739A (en) * | 2020-12-28 | 2021-03-19 | 西南石油大学 | Underground hydraulic drive spiral-cyclone coupling tube separator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687710A (en) * | 2022-03-30 | 2022-07-01 | 西南石油大学 | High-efficient separation degritting backfill device of thermal decomposition under water |
| CN114687710B (en) * | 2022-03-30 | 2023-09-15 | 西南石油大学 | Underwater thermal decomposition efficient separation sand removal backfill device |
| CN115492566A (en) * | 2022-10-24 | 2022-12-20 | 宜宾学院 | Device for realizing multistage hydrate in-situ separation and desanding through series-parallel combination |
| CN115492566B (en) * | 2022-10-24 | 2023-11-14 | 宜宾学院 | Multistage hydrate in-situ separation sand removal device realized by serial-parallel combination |
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| Publication number | Publication date |
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| CN113153235B (en) | 2022-11-15 |
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