CN109555494B - Fidelity coring device - Google Patents
Fidelity coring device Download PDFInfo
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- CN109555494B CN109555494B CN201811495105.3A CN201811495105A CN109555494B CN 109555494 B CN109555494 B CN 109555494B CN 201811495105 A CN201811495105 A CN 201811495105A CN 109555494 B CN109555494 B CN 109555494B
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- Prior art keywords
- fidelity
- temperature
- outer barrel
- cabin
- capsule
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- 239000007788 liquid Substances 0.000 claims abstract description 74
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 239000002826 coolant Substances 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000002775 capsule Substances 0.000 claims description 58
- 238000007789 sealing Methods 0.000 claims description 45
- 238000012545 processing Methods 0.000 claims description 32
- 238000003860 storage Methods 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004321 preservation Methods 0.000 abstract description 7
- 239000011435 rock Substances 0.000 description 32
- 239000002689 soil Substances 0.000 description 19
- 239000007789 gas Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-dimethylformamide Substances CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- UXGNZZKBCMGWAZ-UHFFFAOYSA-N dimethylformamide dmf Chemical compound CN(C)C=O.CN(C)C=O UXGNZZKBCMGWAZ-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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
Landscapes
- 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)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a fidelity coring device, which comprises an outer barrel and a fidelity cabin, wherein the fidelity cabin is arranged in a hollow cavity of the outer barrel, the outer barrel is used for drilling a core, the fidelity cabin is used for accommodating the core, a heater and a third liquid reservoir are arranged in the outer barrel, and the heater is used for heating the fidelity cabin or a coolant stored in the third liquid reservoir is used for cooling the fidelity cabin through comparing the detected temperature of the core in the fidelity cabin with the temperature of a coring position, so that the temperature in the fidelity cabin is kept the same as the temperature of the coring position. Through setting up the fidelity cabin to set up heater and the third reservoir that stores the coolant in the urceolus, through detecting the temperature in the fidelity cabin and the contrast of the temperature of the normal position of coring department, the heater heats or the coolant cools off, has realized that the temperature in the fidelity cabin is the same with the temperature of coring department, reaches the heat preservation effect.
Description
Technical Field
The invention belongs to the technical field of geological exploration, and particularly relates to a fidelity coring device.
Background
The common core obtained by deep drilling at home and abroad at present releases pressure, temperature, pore water and other components, is severely distorted and is irrelevant to the deep in-situ environment. Scientific research with common cores can lead to the following four problems: 1) Ineffective cores (broken to the surface due to stress relief); 2) The reserve evaluation of the oil and gas resources is distorted, and the measurement inaccuracy is inaccurate; 3) Life bodies (microorganisms, viruses, etc.) that may be present in the deep rock formation die; 4) The physical and mechanical parameters of the rock stratum in real states at different depths can not be measured.
Among them, heat preservation is a major problem to be solved.
Disclosure of Invention
The invention aims to provide a fidelity coring device which can realize fidelity coring, in particular to a heat preservation effect.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
The invention provides a fidelity coring device, which comprises an outer barrel and a fidelity cabin, wherein the fidelity cabin is arranged in a hollow cavity of the outer barrel, the outer barrel is used for drilling a core, the fidelity cabin is used for accommodating the core, a heater and a third liquid reservoir are arranged in the outer barrel, and the heater is used for heating the fidelity cabin or a coolant stored in the third liquid reservoir is used for cooling the fidelity cabin through comparing the detected temperature of the core in the fidelity cabin with the temperature of a coring position, so that the temperature in the fidelity cabin is kept the same as the temperature of the coring position.
The temperature sensor is arranged in the outer barrel and is used for detecting the temperature of the rock core in the fidelity cabin and feeding back an electric signal of the temperature in real time.
The fidelity coring device comprises a processing unit, wherein the processing unit receives an electric signal of temperature fed back by the temperature sensor and sends out an instruction to control the heater to heat or the third liquid reservoir to input a coolant for cooling.
And a third control valve is arranged on a pipeline between the third liquid storage device and the fidelity cabin, the third control valve is electrically connected with the processing unit, and the processing unit controls the cooling of the fidelity cabin by controlling the opening and closing of the third control valve.
The third liquid storage device is arranged above the fidelity cabin, net-shaped capillary channels are arranged around the outer wall of the fidelity cabin, and the third liquid storage device is connected with the capillary channels through the channels.
The heater is of a net structure and is sleeved on the periphery of the fidelity cabin, so that the fidelity cabin is uniformly heated, and an insulating layer is coated on the surface of the heater.
The outer cylinder is further provided with a sealing piece, the sealing piece is provided with an elastic sheet, and after the fidelity cabin completely enters the hollow cavity of the outer cylinder, the sealing piece is driven to pop out by the elastic sheet, so that the sealing piece seals the space of the hollow cavity of the outer cylinder to form a sealing space.
The sealing structure is arranged on the side face of the sealing piece in a surrounding mode, and when the sealing piece is in a sealing state of the outer cylinder, the sealing structure on the side face of the sealing piece is clung to the inner wall of the outer cylinder.
The automatic control device comprises an outer barrel, a rock core, a fidelity cabin, an electric release structure, a sealing piece and a sealing action, wherein the electric release structure is arranged on the elastic piece, the outer barrel is further provided with a position sensor, the position sensor is used for detecting whether the rock core completely enters the fidelity cabin, and the electric release structure executes the operation of releasing the elastic piece according to the detection structure of the position sensor, so that the sealing action of the sealing piece is automatically controlled.
The fidelity coring device further comprises an inner cylinder, the inner cylinder is arranged in the hollow cavity of the outer cylinder, the fidelity cabin is of a cylinder structure and is arranged in the hollow cavity of the inner cylinder, or the fidelity cabin is the space of the hollow cavity of the inner cylinder.
According to the fidelity coring device provided by the invention, the fidelity cabin is arranged, the heater and the third liquid storage device for storing the coolant are arranged in the outer barrel, and the temperature in the fidelity cabin is heated or cooled by the heater through detecting the comparison between the temperature in the fidelity cabin and the temperature of the original position of the coring position, so that the temperature in the fidelity cabin is the same as the temperature of the coring position, and the heat preservation effect is achieved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of the modularity of the cross-sectional structure of the structure of a fidelity coring device of one embodiment;
FIG. 2 is a schematic cross-sectional view of a fidelity coring device of an embodiment.
FIG. 3 is a schematic structural view of a closure of an embodiment;
FIG. 4 is a schematic structural view of an inner barrel of an embodiment;
FIG. 5 is a schematic diagram of a control portion of a fidelity coring of an embodiment.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an embodiment of the present invention provides a fidelity coring device, which includes an outer barrel 10, an inner barrel 20 and a fidelity capsule 30, wherein the inner barrel 20 is accommodated in a hollow cavity of the outer barrel 10, and the fidelity capsule 30 is disposed in the inner barrel 20.
Referring to fig. 1 and 2, the end of the outer cylinder 10 is provided with a drill bit 11, and the drill bit 11 is used to excavate the inside of soil or rock and obtain a core. The end of the inner cylinder 20 on the same side as the outer cylinder 10 may also be provided with a drill for performing fine cutting processing on the core obtained by drilling the outer cylinder 10, so that the core is formed into a predetermined shape, such as a cylindrical shape, so as to be received in the fidelity capsule 30. The outer barrel 10 and the inner barrel 20 can relatively move, and the moving direction is along the axial direction of the outer barrel 10, so that the drill bits of the outer barrel 10 and the inner barrel 20 can cut at different times, and the coring efficiency is quickened. In order to maintain the drilling temperature of the drill bit 11 in a normal range, a coolant flow passage may be further provided in the gap between the outer cylinder 10 and the inner cylinder 20 for cooling the drill bit 11.
The fidelity coring device provided by the embodiment of the invention aims to obtain the core which is the same as the actual environment of the original position of the soil or rock and the like, so that the basis can be provided for the subsequent study of the property of the soil or rock at the position. The research on the core obtained by the fidelity coring device provided by the embodiment of the invention can be applied to the fields of oil gas resource detection, geological structure analysis, deep microorganism research and the like.
Further, "fidelity" of the fidelity coring device provided by the embodiment of the present invention may include heat preservation, pressure maintaining, quality guarantee, moisture preservation, or light preservation, etc., that is, the obtained core may be consistent with the temperature, pressure, composition, humidity, or luminous flux of the soil or rock at the in-situ location of coring.
Referring to fig. 1, the fidelity module 30 may be a space of a hollow cavity of the inner barrel 20, or may be a separate barrel structure disposed in the hollow cavity of the inner barrel 20, where the barrel structure has a cavity for accommodating a core.
In one embodiment, referring to fig. 1 and 2, the fidelity capsule 30 is integrally disposed in the outer barrel 10, a sealing member 3 may be disposed on the outer barrel 10, and during coring, the sealing member 3 is opened to allow a core to extend into the cavity of the fidelity capsule 30 through the outer barrel 10, and the sealing member 3 seals the outer barrel 10 after the core completely enters the fidelity capsule 30, so that the fidelity capsule 30 is accommodated in the hollow cavity of the sealed outer barrel 10.
In one embodiment, the Fidelity pod 30 is integrally disposed within the inner barrel 20, and the closure 3 may be disposed on the inner barrel 20. During coring, the closure 3 is opened to allow a core to extend through the inner barrel 20 into the cavity of the Fidelity pod 30. After the core has completely entered the Fidelity pod 30, the closure 3 closes the inner barrel 20 such that the Fidelity pod 30 is received within the hollow cavity of the closed inner barrel 20.
In one embodiment, a sealing member 3 may be further disposed on the fidelity capsule 30, and when the drill bit of the outer barrel 10 or the inner barrel 20 drills the core, the sealing member 3 is opened until the core completely enters the fidelity capsule 30, and the sealing member 3 seals the fidelity capsule 30, so that the core is accommodated in the sealed cavity of the fidelity capsule 30.
The closure 3 of the above embodiment may take a suitable configuration. Taking an embodiment in which the outer cylinder 10 is provided with the sealing member 3 as an example, referring to fig. 3, the sealing member 3 may be a flap structure, and when the outer cylinder 10 is in an open state, the sealing member 3 is attached to an inner wall of the outer cylinder 3; when the outer cylinder 10 is in the closed state, the closing member 3 is ejected from the inner wall of the outer cylinder 3 to close the outer cylinder 10. The sealing piece 3 can be provided with a structure such as a spring piece 31 for driving the sealing piece 3 to move, the spring piece 31 is arranged on the surface of one side of the sealing piece 3, which is opposite to the inner cylinder 20, and when the sealing piece 3 is attached to the inner wall of the outer cylinder 3, the spring piece 31 is in a compressed structure; when it is necessary to close the outer cylinder 10, the elastic release of the elastic piece 31 ejects the closing piece 3 to close the outer cylinder 10. The closing member 3 rotates under the elastic action of the elastic sheet 31, and as shown in fig. 3, the closing member 31 is attached to the outer cylinder 3, and when the closing member 31 rotates, the closing member 31 rotates around the center of the circle at the lower end of the closing member 31 shown in fig. 3, and the rotation angle is 90 degrees, so that the structure of the closing member 3 shown in fig. 2 is finally formed. In one embodiment, when the sealing element 3 is attached to the inner wall of the outer cylinder 3, the elastic piece 31 abuts against the inner wall of the outer cylinder 3, and due to the relative movement between the inner cylinder 20 and the outer cylinder 10, the inner cylinder 20 can have an abutting force on the sealing element 3 to limit the elastic piece 31 of the sealing element 3 to be in a compressed state; when the inner cylinder 20 moves to a specific position, the inner cylinder 20 gradually moves away from the closure member 3, so that the closure member 3 loses the restriction of the inner cylinder 20, and the elastic sheet 31 can release elasticity, so that the closure member 3 ejects to close the outer cylinder 10, and automatic ejection of the closure member 3 is realized. In one embodiment, the release of the elastic sheet 31 of the closure member 3 is automatically controlled by other means, for example, an electric release structure is arranged on the elastic sheet 31, the electric release structure can be an electrically controlled spring, two ends of the spring are connected to the elastic sheet 31, and the spring is released when the power is applied to release the pressure (or the tension) on the elastic sheet 31; the electric release mechanism maintains a compressive (or tensile) force on the dome 31 when the power is off, so that the dome 31 maintains a compressed state. The electric release structure may include a power source, a switch and a position sensor, the position sensor is disposed on the outer barrel 10 and is used for sensing whether the core has completely entered the fidelity capsule 30, if yes, the switch is closed to be electrified, the pressure (or the pulling force) on the elastic sheet 31 is released, the elastic force of the elastic sheet 31 drives the sealing member 3 to move, so as to seal the outer barrel 10, and the control of the electric release structure may be controlled by adopting a processing unit 100. In other embodiments, the closure 3 may be of other types of construction.
In one embodiment, in order to enable the closure member 3 to be effectively closed, taking the case that the closure member 3 is disposed on the inner wall of the outer cylinder 10 as an example, a circle of sealing structure, such as a sealing ring, may be enclosed on the side surface of the closure member 3. When the sealing piece 3 is in a state of sealing the outer barrel 10, the side face of the sealing piece 3 is attached to the inner wall of the outer barrel 10, and a circle of sealing structure is arranged, so that the sealing piece 3 can be in contact with the outer barrel 10 more tightly, and the sealing effect is better.
Referring to fig. 1 and 2, a first liquid storage device 40 and a second liquid storage device 50 are disposed in the outer barrel 10, liquid is filled in the first liquid storage device 40 and the second liquid storage device 50, the first liquid storage device 40 and the second liquid storage device 50 are communicated with the fidelity capsule 30 through structures such as pipelines, so that the liquid can enter the fidelity capsule 30, the liquid in the first liquid storage device 40 and the liquid in the second liquid storage device 50 can perform mass transfer function in the fidelity capsule 30, further phase change is generated, and finally a layer of protective film is formed on the peripheral surface of the rock core so as to ensure that the components, humidity and the like of the rock core are consistent with those of the soil or rock components and humidity of the original position of the core, and a fidelity effect is achieved.
Specifically, the liquid stored in the first liquid storage device 40 is a liquid a, the liquid stored in the second liquid storage device 50 is a liquid B, and the liquid a can be specifically a dripping film forming agent, such as a solution formed by mixing polysulfone and DMF (N, N-Dimethylformamide N, N-dimethylformamide); the solution B can be water or ethanol solution. The mass transfer principle is that the solvent in the solution A is more soluble in the solution B, the solute in the solution A can be separated, and the two liquids are mixed and solidified into a film to form a layer of sealing film for wrapping the rock core.
Referring to fig. 1,2 and 4, taking the core accommodated in the inner cavity of the inner barrel 20 as an example (i.e. the fidelity capsule 30 is a hollow cavity of the inner barrel 20), a flow channel 22 is disposed inside the sidewall of the inner barrel 20, and the flow channel 22 surrounds the top wall and the peripheral sidewall of the inner barrel 20. The inner wall of the inner cylinder 20 is also provided with a plurality of wall holes 23, the plurality of wall holes 23 are uniformly distributed on the peripheral side wall of the inner cylinder 20, and of course, the wall holes 23 can also be distributed on the top wall. The wall aperture communicates the flow passage 22 with the hollow cavity of the inner barrel 20. The inner cylinder 20 is also provided with a liquid inlet 24, the liquid inlet 24 is provided with a first control valve 25, and the first control valve 25 can control the opening and closing of the liquid inlet 24. The liquid inlet 24 is preferably formed on the top wall of the inner cylinder 20, and the liquid inlet 24 is communicated with the outside and the flow channel 22, at this time, the liquid can flow downwards under the action of gravity after entering the liquid inlet 24 to fill the flow channel 22, and flows into the hollow cavity of the inner cylinder 20 from the wall hole 23. The first reservoir 40 and the second reservoir 50 are both connected to the inlet 24 by a pipe such that both liquid a and liquid B can flow into the hollow cavity of the inner barrel 20 through the inlet 24. Preferably, the liquid a and the liquid B do not flow into the liquid inlet 24 at the same time, but flow into the liquid inlet in sequence, that is, the position where the mass transfer effect of the liquid a and the liquid B occurs and the phase change occurs is not generated in the flow channel 22, but in the hollow cavity of the inner barrel 20, and the core is accommodated in the hollow cavity of the inner barrel 20, so that the mass transfer effect of the liquid a and the liquid B occurs on the surface of the core and the phase change occurs, and a protective film wrapping the core is formed, and the protective film can isolate the external environment condition, so that the components, humidity, luminous flux and the like of the core are kept the same as those of the soil or the rock and the like at the coring position.
In an embodiment, referring to fig. 2 and 4, the first liquid reservoir 40 is disposed at the top of the inner cylinder 20, and the first liquid reservoir 40 and the liquid inlet 24 on the inner cylinder 20 are disposed adjacently. The second liquid reservoir 50 is disposed above the first liquid reservoir 40, the second liquid reservoir 50 is connected to the liquid inlet 23 through a pipe, and a second control valve 51 may be disposed on the pipe, where the second control valve 51 is used to control whether the B liquid flows to the liquid inlet 24.
Referring to fig. 1 and 2, in one embodiment, a third reservoir 60 is disposed in the outer barrel 10, and the third reservoir 60 is used for storing a coolant, such as liquid nitrogen, for cooling the inner barrel 20, and thus the fidelity capsule 30, and finally cooling the core. The heater 12 is arranged on the periphery of the inner barrel 20, the heater 12 can be, for example, a resistance wire, and the heater 12 can heat the inner barrel 20, further heat the fidelity capsule 30 and finally heat the rock core. Also provided within the outer barrel 10 is a temperature sensor 4, the temperature sensor 4 being used to detect the temperature of the core in the fidelity capsule 30 and also to detect the temperature of the soil or rock at the coring site during drilling. The function of maintaining the original temperature condition is achieved by comparing the temperature in the capsule 30 with the temperature of the soil or rock at the coring site and by adjusting by means of the third reservoir 60 releasing the coolant for cooling or heating by the heater 12 so that the temperature in the capsule 30 is the same as the temperature of the soil or rock at the coring site.
Specifically, referring to fig. 1 and 2, the third liquid reservoir 60 is disposed above the second liquid reservoir 50, the third liquid reservoir 60 is connected to the outer wall of the inner cylinder 20 through a pipe, and the periphery of the outer wall of the inner cylinder 20 may be provided with a meshed capillary channel, so that the inner cylinder 20 can be uniformly cooled after the coolant enters the capillary channel. Similarly, the heater 12 provided around the outer wall of the inner tube 20 may have a net-like structure, so that the inner tube 20 can be heated uniformly. To avoid shorting, the heater 12 surface is coated with an insulating layer. In one embodiment, the heater 12 may also be provided on the inner wall of the outer cartridge 10. The temperature sensor 4 is disposed on the outer cylinder 10 at a position close to the outlet of the lower end portion of the inner cylinder 20 and is located inside the outer cylinder 10 after the closure 3 is closed, so as to approach the fidelity capsule 30 and not to block the movement of the inner cylinder 20 relative to the outer cylinder 10.
Referring to fig. 1 and 2, in one embodiment, an accumulator 70 is further disposed in the outer barrel 10, the accumulator 70 is connected to the fidelity capsule 30, and the accumulator 70 is used to pressurize or depressurize the fidelity capsule 30 so that the pressure in the fidelity capsule 30 is the same as the pressure at the coring site. Specifically, a pressure regulator (not shown) is disposed between the accumulator 70 and the fidelity capsule 30, and the pressure regulator is driven by the accumulator 70 to regulate the pressure of the fidelity capsule 30, so that the pressure of the fidelity capsule 30 is balanced. The pressure regulating member may be, for example, a piston, and the accumulator 70 may provide compressed gas to push the piston, or to pump air back to the piston. When the pressure in the chamber 30 drops, the accumulator 70 provides compressed gas to push the piston, which can make the chamber 30 compressed and the volume reduced, so as to keep the pressure of the chamber 30 unchanged. When the pressure in the fidelity cabin 30 rises, the accumulator is pumped to draw back the piston, so that the fidelity cabin 30 is depressurized and the volume is increased, and the pressure of the fidelity cabin 30 is kept unchanged. The outer barrel 10 is also provided with a pressure sensor 5, and the pressure sensor 5 is used for detecting the pressure in the fidelity cabin 30 and also can be used for detecting the pressure of soil or rock at the coring position. When the core contains a significant amount of moisture (or liquid component), the pressure herein is referred to as osmotic pressure. The function of maintaining the original pressure condition is achieved by comparing the pressure in the capsule 30 with the pressure of the soil or rock at the coring site and adjusting by means of the accumulator 70 adjusting the pressure adjusting member so that the pressure in the capsule 30 is the same as the pressure of the soil or rock at the coring site.
Specifically, referring to FIG. 2, the accumulator 70 is disposed at an upper portion of the inner barrel 20, preferably above the third reservoir 60. The pressure regulating member may be disposed in a space between the inner cylinder 20 and the accumulator 70. In one embodiment, referring to fig. 1 and 2, the pressure sensor 5 may be disposed on the outer cylinder 10 near the outlet of the lower end of the inner cylinder 20 and inside the outer cylinder 10 after the closure 3 is closed to access the fidelity chamber 30 without blocking the movement of the inner cylinder 20 relative to the outer cylinder 10. In another embodiment, the pressure sensor 5 is disposed on the top wall of the fidelity capsule 30 (or the inner barrel 20) and can be directly contacted with the core.
The above embodiments describe a fidelity approach to coring soil or rock, and the principles of the embodiments of the present invention may also be used when large volumes of liquids or gases are involved, such as in the detection of oil or gas. The difference is that the fidelity capsule 30 requires better sealing when properly tuned for the composition of the core, e.g., oil or gas is detected, oil is the liquid, and gas is the gas. When the components, humidity and luminous flux are maintained, the liquid A and the liquid B can not be in direct contact with the rock core, and the formed protective film can be wrapped on the outer wall of the fidelity capsule 30.
Referring to fig. 2, in order to reduce friction between the core and the inner wall of the fidelity capsule 30, a lubrication element is further disposed on the inner wall of the fidelity capsule 30, and the lubrication element in this embodiment may be a graphene layer structure.
Referring to fig. 5 in combination with fig. 1 and 2, the control portion of the fidelity coring device of the present invention includes a processing unit 100, a power source 200, connecting wires and various valves. The processing unit 100 has a preset program, and the preset program can issue specific instructions according to needs. Specifically, the processing unit 100 may be a PLC board provided in the outer tub 10 or an electronic computer provided in a human activity area, or the like. The power supply 200 supplies power to the processing unit 100 and the heater 12, and connection lines are connected between the processing unit 100 and the respective valves for transmitting instructions of the processing unit 100. After receiving the instruction from the processing unit 100, the valve performs an action of opening or closing the valve, thereby realizing the fidelity function described in the above embodiment.
Specifically, a third control valve 61 is disposed on a pipeline connecting the third liquid storage 60 and the fidelity cabin 30, a fourth control valve 71 is disposed on a pipeline connecting the accumulator 70 and the fidelity cabin 30, and the third control valve 61 and the fourth control valve 71 are electric control valves. The processing unit 100 is electrically connected to a power supply 200, a temperature sensor 4, a pressure sensor 5, a first control valve 25, a second control valve 51, a third control valve 61, and a fourth control valve 71.
A switch 201 is provided on a connection line between the power supply 200 and the heater 12, and the control unit 100 controls the switch 201 to be turned on and off, and the switch 201 is used for turning on and off the power supply 200 to heat or not heat the heater 12.
The first control valve 25 and the second control valve 51 are electric control valves, when the rock core completely enters the fidelity cabin 30, the outer barrel 10 is closed by the sealing piece 3, the processing unit 100 controls the first control valve 25 to be opened, the liquid A in the first liquid reservoir 40 enters the fidelity cabin 30, then the processing unit 100 controls the second control valve 51 to be opened, the liquid B in the second liquid reservoir 50 enters the fidelity cabin 30, the liquid A and the liquid B perform mass transfer effect and then phase change, a protective film is formed to cover the rock core, and isolation of the rock core and the external environment is realized.
The temperature sensor 4, the pressure sensor 5 and the processing unit 100 can be electrically connected in a wireless manner, so that a communication function is realized.
The temperature sensor 4 transmits an electrical signal of the temperature in the fidelity capsule 30 to the processing unit 100, and the processing unit 100 determines that the temperature of the fidelity capsule 30 needs to be raised or lowered according to the temperature in the fidelity capsule 30 compared with the temperature of the soil or rock at the coring site. Further, if a temperature rise is required, the processing unit 100 controls the switch 201 to be closed, and the heater 12 heats the fidelity capsule 30 until the temperature of the fidelity capsule 30 is the same as the temperature of the soil or rock at the coring site. If cooling is required, the processing unit 100 controls the third control valve 61 to open, and the coolant in the third reservoir 60 flows to the fidelity capsule 30 and takes away the heat of the fidelity capsule 30, so as to cool until the temperature of the fidelity capsule 30 is the same as the temperature of the soil or rock at the coring site. In the heating and cooling process, the temperature sensor 4 may feed back the temperature of the fidelity cabin 30 to the processing unit 100 in real time, so that the instruction of the processing unit 100 for controlling heating or cooling is updated in real time, so as to reduce the error.
The pressure sensor 5 transmits an electrical signal of the pressure within the capsule 30 to the processing unit 100, and the processing unit 100 determines that the capsule 30 needs to be pressurized or depressurized based on the temperature within the capsule 30 as compared to the pressure of the soil or rock at the coring site. Further, if pressurization is required, the processing unit 100 controls the fourth control valve 71 to open, compression control in the accumulator 70 enters the fidelity capsule 30, and pressurizes the core until the pressure in the fidelity capsule 30 is the same as the pressure of the soil or rock at the coring site. If depressurization is needed, the fourth control valve 71 is closed, a pressure release valve 72 is further arranged on a pipeline connected between the accumulator 70 and the fidelity capsule 30, the pressure release valve 72 is an electric control valve, the processing unit 100 controls the pressure release valve 72 to be opened, and gas in the fidelity capsule 30 is discharged through the pressure release valve 72 through the pipeline until the pressure of the fidelity capsule 30 is the same as the pressure of soil or rock at the coring position. In the pressurization or depressurization process, the pressure sensor 5 may feed back the pressure of the fidelity cabin 30 to the processing unit 100 in real time, so that the instruction of the processing unit 100 for controlling pressurization or depressurization is updated in real time, so as to reduce the error.
The first control valve 25, the second control valve 51, the third control valve 61 and the fourth control valve 71 may be shut-off valves, wherein the fourth control valve 71 may be a three-way shut-off valve, and one joint of the fourth control valve 71 is connected to the relief valve 72.
In order to observe the pressure in the fidelity cabin 30 in real time, a fifth control valve 15 may be further provided and connected to the fidelity cabin 30, the fifth control valve 15 may also be a three-way stop valve, one interface of which is connected with a pressure gauge 151, the pressure gauge 151 is arranged at a position that can be observed by a person, the pressure gauge 151 can display the pressure in the fidelity cabin 30 in real time, so that the person can observe the pressure change of the fidelity cabin 30 conveniently, and the pressure in the fidelity cabin 30 is prevented from being inconsistent with the actual pressure caused by faults of the pressure sensor 5, the fourth control valve 71 or the accumulator 70.
The opening degree of each valve can be adjusted according to the requirement, so that the temperature, pressure or mass transfer phase change rate is different. The above disclosure is only a preferred embodiment of the present invention, and it should be understood that the scope of the invention is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present invention.
Claims (9)
1. The fidelity coring device is characterized by comprising an outer barrel and a fidelity cabin, wherein the fidelity cabin is arranged in a hollow cavity of the outer barrel, the outer barrel is used for drilling a core, the fidelity cabin is used for accommodating the core, a heater and a third liquid reservoir are arranged in the outer barrel, and the heater is used for heating the fidelity cabin or a coolant stored in the third liquid reservoir is used for cooling the fidelity cabin through comparing the detected temperature of the core in the fidelity cabin with the temperature of a coring position, so that the temperature in the fidelity cabin is kept the same as the temperature of the coring position;
the outer wall of the fidelity cabin is provided with reticular capillary channels all around, the third liquid storage device is connected with the capillary channels through a pipeline, and the heater is of a reticular structure and is sleeved around the fidelity cabin so as to be used for uniformly heating the fidelity cabin, and the surface of the heater is coated with an insulating layer.
2. A fidelity coring apparatus as claimed in claim 1 wherein a temperature sensor is provided in said outer barrel for detecting the temperature of the core in said fidelity capsule and feeding back an electrical signal of temperature in real time.
3. A fidelity coring device as set forth in claim 2 wherein said fidelity coring device comprises a processing unit that receives an electrical signal of temperature fed back by said temperature sensor and issues instructions to control said heater to heat or said third reservoir to input coolant for cooling.
4. A fidelity coring device as set forth in claim 3 wherein a third control valve is provided in the conduit between said third reservoir and said fidelity capsule, said third control valve being electrically connected to said processing unit, said processing unit controlling the cooling of said fidelity capsule by controlling the opening and closing of said third control valve.
5. A fidelity coring device as set forth in claim 4 wherein said third reservoir is disposed above said fidelity capsule.
6. A fidelity coring device as in claim 1 wherein said outer barrel is further provided with a closure member, said closure member being provided with a spring, said spring driving said closure member to eject when said fidelity capsule is fully within said hollow cavity of said outer barrel, such that said closure member closes said hollow cavity of said outer barrel in a closed space.
7. A fidelity coring apparatus as claimed in claim 6 wherein a ring of sealing structure is provided around the side of said closure, said sealing structure on the side of said closure being in close proximity to the inner wall of said outer barrel when said closure is in a condition in which said outer barrel is closed.
8. A fidelity coring device as in claim 6 wherein said spring is provided with an electrical release structure, said outer barrel is further provided with a position sensor for detecting whether said core is fully within said fidelity capsule, said electrical release structure performing an operation of releasing said spring based on the detection of said position sensor, such that the closing action of said closure is automatically controlled.
9. A fidelity coring device as claimed in any one of claims 1 to 8 wherein said fidelity coring device further comprises an inner barrel disposed within the hollow cavity of said outer barrel, said fidelity capsule being of barrel construction and disposed within the hollow cavity of said inner barrel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811495105.3A CN109555494B (en) | 2018-12-07 | 2018-12-07 | Fidelity coring device |
| PCT/CN2018/124151 WO2020113719A1 (en) | 2018-12-07 | 2018-12-27 | Fidelity coring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811495105.3A CN109555494B (en) | 2018-12-07 | 2018-12-07 | Fidelity coring device |
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| CN111206897B (en) * | 2020-02-22 | 2024-05-24 | 深圳大学 | Moon fidelity core drilling device and system |
| CN111504700A (en) * | 2020-06-05 | 2020-08-07 | 四川大学 | Multi-section temperature control feedback-based fidelity corer experimental device and experimental method |
| CN113882824B (en) * | 2021-03-11 | 2023-03-31 | 四川大学 | Core high temperature high pressure simulation test platform is got in deep |
| CN113202434B (en) * | 2021-06-23 | 2021-12-17 | 东北石油大学 | Self-compensating type in-situ drilling coring and testing device |
| CN115097881A (en) * | 2022-06-15 | 2022-09-23 | 四川大学 | Calibration platform rapid cooling system and control method thereof |
| CN115805104B (en) * | 2023-02-07 | 2023-04-18 | 太原理工大学 | Oil content detection device for in-situ exploitation of oil shale and application method thereof |
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