CN116181262A - In-situ film-forming quality-guaranteeing coring device and coring method for combustible ice - Google Patents
In-situ film-forming quality-guaranteeing coring device and coring method for combustible ice Download PDFInfo
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- CN116181262A CN116181262A CN202211629256.XA CN202211629256A CN116181262A CN 116181262 A CN116181262 A CN 116181262A CN 202211629256 A CN202211629256 A CN 202211629256A CN 116181262 A CN116181262 A CN 116181262A
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 136
- 239000007787 solid Substances 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims description 20
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- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 8
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 8
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 8
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 235000010413 sodium alginate Nutrition 0.000 claims description 7
- 239000000661 sodium alginate Substances 0.000 claims description 7
- 229940005550 sodium alginate Drugs 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229920001661 Chitosan Polymers 0.000 claims description 6
- 108010010803 Gelatin Proteins 0.000 claims description 6
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 6
- 229920000159 gelatin Polymers 0.000 claims description 6
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- 235000019322 gelatine Nutrition 0.000 claims description 6
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- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000000275 quality assurance Methods 0.000 claims 2
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to the technical field of rock drilling, and particularly discloses a combustible ice in-situ film-forming quality-guaranteeing coring device while drilling and a coring method, wherein the coring device comprises a coring barrel provided with an inner cavity, a coring outer drill sleeved on the outer side of the coring barrel, a film forming mechanism axially moving along the coring barrel and positioned in the inner cavity, a sealer positioned at the bottom of the inner cavity, and a cooling assembly arranged on the coring outer drill and used for cooling the coring barrel, the film forming mechanism and the sealer; a film forming liquid storage cavity is formed between the film forming mechanism and the inner cavity, and film forming liquid is stored in the film forming liquid storage cavity; the invention also discloses a coring method, a film layer is rapidly formed on the surface of the core in the coring while drilling, the film layer is a solid film layer with high barrier property through cooling treatment, and the microscopic growth direction is parallel to the outer surface of the core, so that the high-efficiency barrier to substances in the core is realized to the maximum extent, the core has good strength, and the core is protected from being damaged by mechanical disturbance after coring.
Description
Technical Field
The invention relates to the technical field of rock drilling, in particular to a combustible ice in-situ film-forming quality-guaranteeing coring device while drilling and a coring method.
Background
The method for acquiring the substance information accurately reflecting the in-situ combustible ice sample has great scientific significance, and can provide guidance for the accurate exploration and evaluation of the combustible ice reservoir and the research on the submarine microorganism cause and migration rule of alkane.
However, the existing submarine sediment coring technology does not consider taking protective measures on the rock core, the rock core is directly contacted with the external environment, the diffusion loss of substances in the pores of the rock core is difficult to avoid, the analysis result of the rock core is distorted, the original microorganisms die, and the mysterious of the submarine life science cannot be researched.
Disclosure of Invention
The invention aims to solve the technical problem of providing a combustible ice in-situ while-drilling film-forming quality-guaranteeing coring device and a coring method; the invention can prevent the loss of substances in the core, so that the obtained core can truly reflect the occurrence state of the in-situ combustible ice, provide guidance for the exploration and development of submarine resources and lay a foundation for the exploration and research of submarine sediment science and submarine biology.
The invention solves the technical problems by adopting the following solution:
the device comprises a core barrel provided with an inner cavity, a core outer drill sleeved on the outer side of the core barrel, a film forming mechanism axially moving along the core barrel and positioned in the inner cavity, a sealer positioned at the bottom of the inner cavity and used for opening and closing the inner cavity, and a cooling component arranged on the core outer drill and used for cooling the core barrel, the film forming mechanism and the sealer; a film forming liquid storage cavity is formed between the film forming mechanism and the inner cavity, and film forming liquid is stored in the film forming liquid storage cavity.
The core is cored through the coring outer drill, the core enters the inner cavity, in the coring process, the film forming liquid wraps the outer side of the core, the sealer, the coring barrel and the film forming mechanism are cooled through the cooling component, so that the film forming liquid on the top and the bottom of the core form radial directional microscopic growth to form a solid film layer, the side face forms the solid film layer with a microstructure parallel to the side wall of the core, and the microscopic growth directions of the film layer are all parallel to the surface of the core, so that the optimal barrier and mechanical properties can be effectively provided for the core, and the long-acting stable fidelity of the in-situ combustible ice core sample is realized;
in some possible embodiments, the sealer, the core barrel and the film forming mechanism are cooled for effective realization;
the coring outer drill comprises an outer cylinder sleeved on the outer side of the coring barrel and a drill bit connected with the outer cylinder and positioned at the bottom of the sealer; the cooling assembly comprises a cold source runner arranged on the outer barrel, a cold source heat absorption cavity arranged between the outer barrel and one side of the coring outer drill and communicated with the cold source runner, and a liquid cold source.
In some possible embodiments, in order to achieve the transport and storage of the liquid cold source;
the cold source runner comprises a liquid inlet runner and a liquid outlet runner which are respectively connected with the cold source heat absorption cavity; the cold source heat absorption cavity is annular and sleeved on the outer side of the core barrel.
In some possible embodiments, to avoid heat transfer between the outer barrel and the core barrel during the core;
a heat insulation layer is arranged between the outer cylinder and the coring cylinder;
the heat insulation layer comprises two heat insulation lining layers sleeved on the outer side of the coring barrel and a vacuum layer positioned between the two heat insulation lining layers.
In some possible embodiments, to enable the film-forming liquid to form a film on the outside of the core;
the film forming mechanism comprises a liquid discharging piston sleeved in the inner cavity and provided with a liquid discharging channel, and a center rod coaxially arranged with the coring barrel and one end of which is connected with the liquid discharging piston; the other end of the central rod passes through the coring barrel and the coring outer drill;
and the central rod is provided with a drainage channel communicated with the drainage channel.
In some of the possible embodiments of the present invention,
a heat conducting layer is arranged on one side of the liquid draining piston, which is far away from the central rod; the heat conducting layer is provided with a through hole communicated with the liquid discharge channel;
in some possible embodiments, in order to make the film forming liquid flow out of the liquid discharge channel only after passing through the liquid discharge channel;
a one-way valve is arranged in the liquid discharge channel.
In some of the possible embodiments of the present invention,
the liquid cold source is any one of liquid nitrogen and low-temperature alcohol;
the film forming liquid is one or more of polyvinyl alcohol, gelatin, chitosan, sodium alginate and polyacrylamide;
or the film forming liquid is formed by mixing any one or more of polyvinyl alcohol, gelatin, chitosan, sodium alginate and polyacrylamide with any one of calcium chloride, magnesium chloride, calcium nitrate, magnesium nitrate, lithium chloride and lithium nitrate.
In some of the possible embodiments of the present invention,
the sealer comprises a plurality of groups of sealing petals which are the same in structure and are respectively hinged with the bottom of the coring barrel, and the sealing petals are made of spring steel.
The method for the in-situ film formation while drilling quality guarantee coring device of the combustible ice specifically comprises the following steps:
step S1: preparing before coring;
the film forming liquid is preset in a film forming liquid storage cavity and is sent to the bottom of a well;
step S2: coring;
step S3: forming a film in a solid state; conveying a liquid cold source to a cold source heat absorption cavity, and cooling the sealer, the bottom of the coring barrel and the heat conduction layer through the liquid cold source to form a bottom solid film layer, a side solid film layer and a top solid film layer which are wrapped on the outer side of the core respectively;
and S4, taking out the core to finish coring.
In some of the possible embodiments of the present invention,
the step S3 specifically refers to:
after the core completely enters the coring barrel, the inner cavity is closed by the sealer, a top film forming space is formed between the top of the core and the heat conducting layer, a side film forming space is formed between the side surface of the core and the side surface of the coring barrel, and a bottom film forming space is formed between the bottom of the core and the sealer; the film forming liquid is respectively positioned in the top film forming space, the side film forming space and the bottom film forming space;
conveying the liquid cold source to a cold source heat absorption cavity through a liquid inlet channel, and cooling the sealer, the coring barrel and the heat conducting layer by the liquid cold source positioned in the cold source heat absorption cavity respectively; wherein,,
the sealer forms a temperature gradient with low outside temperature and high center temperature, and film forming liquid in the film forming space at the bottom grows in a radial directional microcosmic mode along the center point of the sealer to form a solid film layer parallel to the bottom of the rock core;
forming a temperature gradient with low lower end temperature and high upper end temperature by the coring barrel, and enabling film forming liquid in the side film forming space to grow in a microcosmic mode along the vertical direction of the side wall of the coring barrel to form a solid film layer parallel to the side wall of the core;
the outer side of the heat conducting layer is contacted with the inner side of the coring barrel to form a temperature gradient with low outer side temperature and high center temperature; the film forming liquid in the top film forming space grows in a radial directional microcosmic mode along the center point of the heat conducting layer to form a solid film layer parallel to the top of the rock core.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the film forming mechanism, the core barrel and the sealer can be matched to effectively cover the film forming liquid on the surface of the core in the core taking process, and the liquid cold source is used for cooling the film forming mechanism, the core barrel and the sealer, so that the temperature of the film forming liquid is changed, and the film forming liquid can form a solid film layer with a microscopic directional structure parallel to the outer side of the core; the formed solid film layer plays the best blocking and mechanical properties of the film forming liquid, so that the long-acting stable fidelity of the in-situ combustible ice core sample is realized, and the core is effectively protected from being damaged by mechanical disturbance after coring.
According to the invention, the solid film layer is formed to cover the surface of the rock core, so that the loss of substances in the rock core is effectively prevented, the obtained rock core can truly reflect the in-situ flammable ice occurrence state, guidance is provided for submarine resource exploration and development operation, and a foundation is laid for submarine sediment science and submarine biology exploration and research;
the invention has simple structure and strong practicability.
Drawings
FIG. 1 is a schematic diagram of the structure of a coring device of the present invention prior to coring;
FIG. 2 is a schematic diagram of the coring device according to the present invention during coring;
FIG. 3 is a schematic view of the coring apparatus of the present invention after the end of coring;
FIG. 4 is an enlarged schematic view of FIG. 3 at A;
FIG. 5 is an enlarged schematic view at B in FIG. 4;
wherein: 1. a core is drilled outside; 2. a cold source liquid channel; 3. a thermal insulation layer; 4. a vacuum layer; 5. a core barrel; 6. a central rod; 7. a film forming liquid storage chamber; 8. a one-way valve; 9. a liquid discharge piston; 10. cold source
A heat absorption chamber; 11. a sealer; 12. a drain passage; 13. core; 14. a top film forming space; 15. 5 side film forming space; 16. a bottom film forming space; 17. and a heat conducting layer.
Detailed Description
In the present invention, the terms "mounted," "connected," and "connected," unless explicitly specified and defined otherwise,
The terms "coupled," "secured," and the like are to be construed broadly and may be used, for example, in a fixed connection or as a matter of course
So as to be detachably connected or integrated; can be directly connected or can be indirectly connected through an intermediate medium 0, and can be the communication between the two elements or the interaction relationship between the two elements. At the site of this application
The references to "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. In the practice of the present application, "and/or"
The association relationship describing the association object may represent that there are three relationships, e.g., a and/or B, and 5 may represent: a exists alone, A and B exist together, and B exists alone. In the present application
In the description of the embodiments, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of positioning posts refers to two or more positioning posts. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The present invention will be described in detail below.
0 is shown in fig. 1-5:
the device comprises a coring barrel 5 provided with an inner cavity, a coring outer drill 1 sleeved outside the coring barrel 5, a film forming mechanism axially moving along the coring barrel 5 and positioned in the inner cavity, a sealer 11 positioned at the bottom of the inner cavity and used for opening and closing the inner cavity, and a cooling component arranged on the coring outer drill 1 and used for cooling the coring barrel 5, the film forming mechanism and the sealer 11; a film forming liquid storage cavity 7 is formed between the film forming mechanism and the inner cavity, and film forming liquid is stored in the film forming liquid storage cavity 7.
The core 13 is cored through the coring outer drill 1, the core 13 enters the inner cavity, after the coring is finished, the outside of the core 13 is wrapped by the film forming liquid, the sealer 11, the coring barrel 5 and the film forming mechanism are cooled through the cooling component, so that the film forming liquid on the top and the bottom of the core 13 form a solid film layer in radial directional microscopic growth, the side surface forms a solid film layer with a microstructure parallel to the side wall of the core 13, and the microscopic growth direction of the final film layer is parallel to the surface of the core 13, thereby effectively providing the best barrier and mechanical properties for the core 13 and realizing long-term stable fidelity of the sample of the in-situ combustible ice core 13;
in some possible embodiments, the sealer 11, the core barrel 5, and the film forming mechanism are cooled for efficient implementation;
the coring outer drill 1 comprises an outer cylinder sleeved on the outer side of the coring barrel 5 and a drill bit connected with the outer cylinder and positioned at the bottom of the sealer 11; the cooling component comprises a cold source runner 2 arranged on the outer barrel, a cold source heat absorption cavity 10 which is arranged between the outer barrel and one side of the core drill 1 and is communicated with the cold source runner 2, and a liquid cold source.
In some possible embodiments, in order to achieve the transport and storage of the liquid cold source;
the cold source runner 2 comprises a liquid inlet runner and a liquid outlet runner which are respectively connected with the cold source heat absorption cavity 10; the cold source heat absorption cavity 10 is annular and sleeved on the outer side of the core barrel 5.
The liquid cold source enters the cold source heat absorption cavity 10 from the liquid inlet channel, absorbs heat, is discharged from the liquid outlet channel, and can be used as the liquid cold source again after being treated;
in some possible embodiments, to avoid heat transfer between the outer barrel and the core barrel 5 during the core-taking process;
a heat insulation layer 3 is arranged between the outer cylinder and the coring cylinder 5;
preferably, the heat insulation layer 3 is made of any one of polytetrafluoroethylene, a foaming ceramic plate, a vacuum micro-bead composite material and a vacuum heat insulation plate;
further, the heat insulation layer 3 comprises two heat insulation lining layers sleeved on the outer side of the core barrel 5, and a vacuum layer 4 positioned between the two heat insulation lining layers.
In some possible embodiments, to enable the film-forming liquid to form a film on the outside of the core 13;
the film forming mechanism comprises a liquid discharging piston 9 sleeved in the inner cavity and provided with a liquid discharging channel, and a center rod 6 coaxially arranged with the coring barrel 5 and one end of which is connected with the liquid discharging piston 9; the other end of the center rod 6 passes through the coring barrel 5 and the coring outer drill 1;
the outer side surface of the liquid discharge piston 9 always keeps contact with the inner side surface of the coring barrel 5, so that the film forming liquid cannot flow out of a small gap formed between the liquid discharge piston and the coring barrel, and can only be conveyed through a liquid discharge channel;
further, the coring barrel 5 and the coring outer drill 1 are respectively provided with liquid feeding holes which are communicated with each other and used for conveying the film forming liquid into the film forming liquid storage cavity 7, and the top surface of the liquid discharging piston 9 forms the film forming liquid storage cavity 7 with the inner cavity;
further, the coring outer drill 1 is provided with a drill hole which is coaxial in the inner cavity and is positioned at the bottom of the inner cavity, and when the core 13 passes through the drill hole and the sealer 11 to enter the inner cavity during coring;
the center rod 6 is provided with a drain passage 12 communicating with the drain passage.
In some of the possible embodiments of the present invention,
a heat conducting layer 17 is arranged on one side of the liquid draining piston 9 away from the central rod 6; the heat conducting layer 17 is provided with a through hole communicated with the liquid discharge channel;
the purpose of setting up heat conduction layer 17 is, when liquid cold source is to the section of thick bamboo 5 of taking a core 5 cooling, and the section of thick bamboo 5 of taking a core wholly will be cooled down, heat conduction layer 17 and the cooperation of taking a core 5 contact to make heat conduction layer 17 can be along its and the section of thick bamboo 5 of taking a core vertically direction cooling, wherein outside temperature will be less than its central temperature, finally makes the film forming liquid that forms between core 13 top and the heat conduction layer 17 bottom can take the directional microscopic growth of radial form solid film layer.
Preferably, the heat conducting layer 17 is made of a metal material, so that temperature change can be effectively guaranteed.
In some possible embodiments, in order to make the film forming liquid flow out of the liquid discharge channel only after passing through the liquid discharge channel 12;
a one-way valve 8 is arranged in the liquid discharge channel.
When coring is performed, the one-way valve 8 is opened, and film forming liquid at the upper part of the liquid discharge piston 9 passes through the liquid discharge channel 12 and sequentially passes through the liquid discharge channel and the through hole to be discharged and flows to the side surface of the core 13, so that film is formed on the surface of the core 13; after the coring is finished, the whole core 13 is positioned in the inner cavity, the sealer 11 seals the bottom of the inner cavity, the film forming liquid is placed to leak, and at the moment, the film forming liquid flows into the space between the bottom of the core 13 and the sealer 11 to form a film on the bottom of the core 13, so that the core 13 is protected by wrapping a layer of film forming liquid on the outer side surface of the core 13.
In some of the possible embodiments of the present invention,
the liquid cold source is any one of liquid nitrogen and low-temperature alcohol; the material is adopted as a liquid cold source to effectively realize cooling;
the film forming liquid is one or more of polyvinyl alcohol, gelatin, chitosan, sodium alginate and polyacrylamide;
or, the film forming liquid is formed by mixing any one or more of polyvinyl alcohol, gelatin, chitosan, sodium alginate and polyacrylamide with any one of calcium chloride, magnesium chloride, calcium nitrate, magnesium nitrate, lithium chloride and lithium nitrate; for example, a mixed solution of polyvinyl alcohol and magnesium chloride, a mixed solution of sodium alginate, polyacrylamide, magnesium nitrate and lithium chloride, and the like can be used.
The film forming liquid prepared by the solution can generate physical and chemical changes in a low-temperature environment, and grow in a microscopic orientation along the temperature gradient direction to form a high polymer solution of a solid quality guarantee film layer; perpendicular to the microscopic growth direction of the film material, has the optimal material barrier property for volatile materials; parallel to the microscopic growth direction of the film material, so that the film material has optimal tensile strength.
In some possible embodiments, the bottom of the cavity is closed for effective implementation;
the sealer 11 comprises a plurality of groups of sealing flaps which are the same in structure and are respectively hinged with the bottom of the coring barrel 5, and the sealing flaps are made of spring steel.
The method for the in-situ film formation while drilling quality guarantee coring device of the combustible ice specifically comprises the following steps:
step S1: preparing before coring;
the film forming liquid is preset in the film forming liquid storage cavity 7 and sent to the bottom of the well;
step S2: coring and forming a film;
the end part of the center rod 6 is connected with a fixed part on the outer side and kept static, and the coring outer drill 1 is driven to drill a core 13 downwards;
the core drill 1 moves downwards to enable the central rod 6 and the core barrel 5 to move relatively along the axial direction of the central rod, and the volume of the film forming liquid storage cavity 7 is reduced due to the fact that the central rod 6 is connected with the liquid discharge piston 9;
gradually releasing film forming liquid into the coring barrel 5 through the liquid drainage channel 12 and the one-way valve 8 along with the coring drilling process, and displacing stratum fluid in situ to form film forming liquid to cover the surface of the core 13;
in the process that the core 13 enters the inner cavity of the coring barrel 5, the sealer 11 is automatically bonded with the core 13 along the side face of the center rod 6 and is opened, and the sealer 11 is supported by spring steel so as to have good elasticity, so that the core 13 is aligned and centered and coaxially arranged with the inner cavity, after the core 13 completely enters the coring barrel 5, the sealer 11 seals the bottom of the coring barrel 5 to prevent a large amount of film forming liquid from leaking, and meanwhile, the film forming liquid is permeated into a gap formed between the bottom of the core 13 and the top of the sealer 11 to cover the bottom of the core 13;
step S3: forming a film in a solid state; the liquid cold source is conveyed to the cold source heat absorption cavity 10, and the bottom of the sealer 11, the bottom of the coring barrel 5 and the heat conduction layer 17 are cooled by the liquid cold source to form a bottom solid film layer, a side solid film layer and a top solid film layer which are wrapped on the outer side of the core 13 respectively;
the method specifically comprises the following steps:
after the core 13 completely enters the coring barrel 5, the sealer 11 seals the inner cavity, a top film forming space 14 is formed between the top of the core 13 and the heat conducting layer 17, a side film forming space 15 is formed between the side of the core 13 and the side of the coring barrel 5, and a bottom film forming space 16 is formed between the bottom of the core 13 and the sealer 11; the film forming liquid will be located in the top film forming space 14, the side film forming space 15 and the bottom film forming space 16, respectively;
the liquid cold source is conveyed to the cold source heat absorption cavity 10 through a liquid inlet channel, and the liquid cold source positioned in the cold source heat absorption cavity 10 cools the sealer 11, the coring barrel 5 and the heat conducting layer 17 respectively; wherein,,
the sealer 11 forms a temperature gradient with low outside temperature and high center temperature, and film forming liquid in the bottom film forming space 16 radially and directionally grows in a microscopic mode along the center point of the sealer 11 to form a solid film layer parallel to the bottom of the core 13;
the core barrel 5 forms a temperature gradient with low lower end temperature and high upper end temperature, and film forming liquid in the side film forming space 15 grows in a microcosmic orientation along the vertical direction of the side wall of the core barrel 5 to form a solid film layer parallel to the side wall of the core 13;
the outer side of the heat conducting layer 17 contacts with the inner side of the coring barrel 5 to form a temperature gradient with low outer side temperature and high center temperature; the film forming liquid in the top film forming space 14 grows in a radial orientation microcosmic way along the central point of the heat conducting layer 17 to form a solid film layer parallel to the top of the core 13
And S4, taking out the core 13 to finish coring.
According to the invention, a layer of solid film with high barrier property is rapidly formed on the surface of the core 13 in the coring while drilling process, and the microscopic growth direction of the solid film is parallel to the surface of the core 13, so that the high-efficiency barrier to substances in the core is realized to the maximum extent, the core has good strength, and the core is protected from mechanical disturbance and damage after coring; the solid film layer can preserve volatile alkane components in the flammable ice core, maintain the humidity stability of the core and the in-situ darkness dark environment, so as to truly obtain the core sample for preserving the submarine in-situ real state.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (10)
1. The device is characterized by comprising a core barrel provided with an inner cavity, a core outer drill sleeved on the outer side of the core barrel, a film forming mechanism axially moving along the core barrel and positioned in the inner cavity, a sealer positioned at the bottom of the inner cavity and used for opening and closing the inner cavity, and a cooling component arranged on the core outer drill and used for cooling the core barrel, the film forming mechanism and the sealer; a film forming liquid storage cavity is formed between the film forming mechanism and the inner cavity, and film forming liquid is stored in the film forming liquid storage cavity.
2. The in-situ film-forming, quality-guaranteeing and coring device of the combustible ice according to claim 1, wherein the coring outer drill comprises an outer barrel sleeved outside the coring barrel and a drill bit connected with the outer barrel and positioned at the bottom of the sealer; the cooling assembly comprises a cold source runner arranged on the outer barrel, a cold source heat absorption cavity arranged between the outer barrel and one side of the coring outer drill and communicated with the cold source runner, and a liquid cold source.
3. The in-situ film-forming, quality-guaranteeing and coring device of the combustible ice according to claim 2, wherein the cold source runner comprises a liquid inlet runner and a liquid outlet runner which are respectively connected with the cold source heat absorption cavity; the cold source heat absorption cavity is annular and sleeved on the outer side of the core barrel.
4. The combustible ice in-situ film formation while drilling quality guarantee coring device of claim 2, wherein a thermal insulation layer is arranged between the outer barrel and the coring barrel;
the heat insulation layer comprises two heat insulation lining layers sleeved on the outer side of the coring barrel and a vacuum layer positioned between the two heat insulation lining layers.
5. The in-situ film-forming and quality-guaranteeing coring device for the combustible ice according to claim 1, wherein the film-forming mechanism comprises a liquid discharge piston sleeved in an inner cavity and provided with a liquid discharge channel, and a central rod coaxially arranged with the coring barrel and connected with the liquid discharge piston at one end; the other end of the central rod passes through the coring barrel and the coring outer drill;
and the central rod is provided with a drainage channel communicated with the drainage channel.
6. The in-situ film formation while drilling, quality assurance and coring device of claim 5, wherein a thermally conductive layer is disposed on a side of the drain piston remote from the center rod; and the heat conducting layer is provided with a through hole communicated with the liquid discharge channel.
7. The in-situ film formation while drilling, quality guaranteeing and coring device for combustible ice of claim 5, wherein a one-way valve is arranged in the liquid discharge channel; the sealer comprises a plurality of groups of sealing petals which are the same in structure and are respectively hinged with the bottom of the coring barrel, and the sealing petals are made of spring steel.
8. The in-situ film-forming, quality-guaranteeing and coring device for the combustible ice according to any one of claims 1 to 7, wherein the liquid cold source is any one of liquid nitrogen and low-temperature alcohol;
the film forming liquid is one or more of polyvinyl alcohol, gelatin, chitosan, sodium alginate and polyacrylamide;
or the film forming liquid is formed by mixing any one or more of polyvinyl alcohol, gelatin, chitosan, sodium alginate and polyacrylamide with any one of calcium chloride, magnesium chloride, calcium nitrate, magnesium nitrate, lithium chloride and lithium nitrate.
9. The method of a combustible ice in-situ film formation while drilling, quality guaranteeing and coring device according to any one of claims 1 to 8, comprising the specific steps of:
step S1: preparing before coring;
the film forming liquid is preset in the film forming liquid storage cavity, and the whole core extractor is sent to the bottom of the well;
step S2: coring;
step S3: forming a film in a solid state; conveying a liquid cold source to a cold source heat absorption cavity, and cooling the sealer, the bottom of the coring barrel and the heat conduction layer through the liquid cold source to form a bottom solid film layer, a side solid film layer and a top solid film layer which are wrapped on the outer side of the core respectively;
and S4, taking out the core to finish coring.
10. The method for coring a combustible ice in-situ film formation while drilling quality assurance coring device of claim 9,
the step S3 specifically refers to:
after the core completely enters the coring barrel, the inner cavity is closed by the sealer, a top film forming space is formed between the top of the core and the heat conducting layer, a side film forming space is formed between the side surface of the core and the side surface of the coring barrel, and a bottom film forming space is formed between the bottom of the core and the sealer; the film forming liquid is respectively positioned in the top film forming space, the side film forming space and the bottom film forming space;
conveying the liquid cold source to a cold source heat absorption cavity through a liquid inlet channel, and cooling the sealer, the coring barrel and the heat conducting layer by the liquid cold source positioned in the cold source heat absorption cavity respectively; wherein,,
the sealer forms a temperature gradient with low outside temperature and high center temperature, and film forming liquid in the film forming space at the bottom grows in a radial directional microcosmic mode along the center point of the sealer to form a solid film layer parallel to the bottom of the rock core;
forming a temperature gradient with low lower end temperature and high upper end temperature by the coring barrel, and enabling film forming liquid in the side film forming space to grow in a microcosmic mode along the vertical direction of the side wall of the coring barrel to form a solid film layer parallel to the side wall of the core;
the outer side of the heat conducting layer is contacted with the inner side of the coring barrel to form a temperature gradient with low outer side temperature and high center temperature; the film forming liquid in the top film forming space grows in a radial directional microcosmic mode along the center point of the heat conducting layer to form a solid film layer parallel to the top of the rock core.
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| CN202211629256.XA CN116181262B (en) | 2022-12-19 | 2022-12-19 | In-situ film-forming quality-guaranteeing coring device and coring method for combustible ice |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3064742A (en) * | 1958-09-05 | 1962-11-20 | Jersey Prod Res Co | Obtaining unaltered core samples |
| US20040256151A1 (en) * | 2003-06-19 | 2004-12-23 | Independent Administrative Institution, Japan Agency For Marine-Earth Science And Technology | Crustal core sampler and method of coring crustal core sample using the same |
| CN202266217U (en) * | 2011-08-28 | 2012-06-06 | 中国石油集团长城钻探工程有限公司 | Heat-preserving and pressure-maintaining coring tool |
| CN105745395A (en) * | 2013-12-24 | 2016-07-06 | 哈里伯顿能源服务公司 | Method of filling a coring tool inner barrel with a coring fluid |
| CN111734332A (en) * | 2020-07-29 | 2020-10-02 | 四川大学 | Film-forming while drilling simulation device and film-forming while drilling coring method |
| CN212693299U (en) * | 2020-08-07 | 2021-03-12 | 深圳大学 | Moon-based following protection device while drilling |
| CN214886947U (en) * | 2021-05-24 | 2021-11-26 | 大庆明悦石油科技有限公司 | Well drilling heat preservation shape-preserving coring tool |
| CN114705548A (en) * | 2022-02-28 | 2022-07-05 | 南京工业大学 | Testing device and method for thermophysical property parameters of rock and soil material in complex stress state |
| CN217084587U (en) * | 2021-10-29 | 2022-07-29 | 李伟娟 | Hydraulic engineering concrete bank protection prevention of seepage water nature check out test set |
| RU2783366C1 (en) * | 2022-02-16 | 2022-11-11 | федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") | Installation for determination of thermal conductivity of materials under pressure |
| CN115372590A (en) * | 2022-08-24 | 2022-11-22 | 四川大学 | Simulation device for deep in-situ film-forming quality-guaranteeing coring while drilling |
-
2022
- 2022-12-19 CN CN202211629256.XA patent/CN116181262B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3064742A (en) * | 1958-09-05 | 1962-11-20 | Jersey Prod Res Co | Obtaining unaltered core samples |
| US20040256151A1 (en) * | 2003-06-19 | 2004-12-23 | Independent Administrative Institution, Japan Agency For Marine-Earth Science And Technology | Crustal core sampler and method of coring crustal core sample using the same |
| CN202266217U (en) * | 2011-08-28 | 2012-06-06 | 中国石油集团长城钻探工程有限公司 | Heat-preserving and pressure-maintaining coring tool |
| CN105745395A (en) * | 2013-12-24 | 2016-07-06 | 哈里伯顿能源服务公司 | Method of filling a coring tool inner barrel with a coring fluid |
| CN111734332A (en) * | 2020-07-29 | 2020-10-02 | 四川大学 | Film-forming while drilling simulation device and film-forming while drilling coring method |
| CN212693299U (en) * | 2020-08-07 | 2021-03-12 | 深圳大学 | Moon-based following protection device while drilling |
| CN214886947U (en) * | 2021-05-24 | 2021-11-26 | 大庆明悦石油科技有限公司 | Well drilling heat preservation shape-preserving coring tool |
| CN217084587U (en) * | 2021-10-29 | 2022-07-29 | 李伟娟 | Hydraulic engineering concrete bank protection prevention of seepage water nature check out test set |
| RU2783366C1 (en) * | 2022-02-16 | 2022-11-11 | федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") | Installation for determination of thermal conductivity of materials under pressure |
| CN114705548A (en) * | 2022-02-28 | 2022-07-05 | 南京工业大学 | Testing device and method for thermophysical property parameters of rock and soil material in complex stress state |
| CN115372590A (en) * | 2022-08-24 | 2022-11-22 | 四川大学 | Simulation device for deep in-situ film-forming quality-guaranteeing coring while drilling |
Non-Patent Citations (3)
| Title |
|---|
| LIANG-YU ZHU 等: ""Deep original information preservation by applying in-situ film formation technology during coring"", 《PETROLEUM SCIENCE》, 31 March 2022 (2022-03-31), pages 1322 - 1333 * |
| 李佩武;王建军;: "密闭取心技术在超深井元坝123井应用", 钻采工艺, no. 06, 25 November 2016 (2016-11-25) * |
| 李明朝;丛海洋;鲁金峰;: "SL Rmb-8100型取心工具的研制与应用", 石油机械, no. 09, 10 September 2013 (2013-09-10) * |
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