CN113356778B - Ultrahigh-pressure high-temperature rock core sample transfer system and working process thereof - Google Patents
Ultrahigh-pressure high-temperature rock core sample transfer system and working process thereof Download PDFInfo
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- CN113356778B CN113356778B CN202110618147.7A CN202110618147A CN113356778B CN 113356778 B CN113356778 B CN 113356778B CN 202110618147 A CN202110618147 A CN 202110618147A CN 113356778 B CN113356778 B CN 113356778B
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- 238000012546 transfer Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 108010066278 cabin-4 Proteins 0.000 description 18
- 108010066057 cabin-1 Proteins 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 210000005069 ears Anatomy 0.000 description 7
- 238000011160 research Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 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 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- 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
- E21B25/005—Above ground means for handling the core, e.g. for extracting the core from the core barrel
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- 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
- E21B25/10—Formed core retaining or severing means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to an ultrahigh pressure and high temperature rock core sample transfer system and a working process thereof, wherein the system comprises a transfer cabin, the transfer cabin is an annular pressure-resistant cabin, one end of the transfer cabin is hermetically provided with a switch valve, the other end of the transfer cabin is hermetically connected with an oil cylinder barrel, a piston rod of the oil cylinder barrel penetrates through a cabin cover of the transfer cabin and then enters the interior of the transfer cabin, the tail part of the oil cylinder barrel is provided with a rotating handle in a matching way, and the outer wall surface of the oil cylinder barrel is provided with a water cooling sleeve in a matching way; the outer end position sealing connection of ooff valve has and gets the core cabin or prepare the cabin, it has the core to get in the core cabin, the head of core is provided with fixture, fixture corresponds and matches with the piston rod, can overcome the sample core under superhigh pressure, high temperature state when taking out from getting the core cabin with the huge frictional force of sealing member, realize the transfer of core sample.
Description
Technical Field
The invention relates to the technical field of sample transfer equipment, in particular to an ultrahigh-pressure high-temperature core sample transfer system and a working process thereof.
Background
Continuous, safe and green energy supply is the basic guarantee of economic high-speed development, with the gradual depletion of shallow resources, resource development continuously moves to the deep part of the earth, and the exploitation of deep resources becomes a new normal state, so that basic theory research developed around improving the deep resource acquisition capability becomes an important mark of the world mining strong country.
In the prior art, the research method for the characteristics of the deep coal rock utilizes a coring technology to carry out deep sampling, and then carries out analysis and research in a laboratory, and the process comprises three steps: collecting and transferring the sample in the well to a laboratory and carrying out sample segmentation research in the laboratory. In the prior theory, when the pressure is averagely increased by 2.5MPa and the temperature is averagely increased by 3 ℃ from the ground to a rock stratum every 100 meters, the physical and chemical properties of a deep rock mass greatly depend on the temperature and pressure states, so that in the implementation process of three steps of collecting, transferring to a laboratory and dividing and researching samples in the laboratory, if the temperature and pressure states of a core sample cannot be guaranteed, the physicochemical properties of the core sample can be irreversibly changed.
The term "downhole collection" generally refers to the mining of a core sample deep in a earth ball, and the core sample is stored in a core cabin in situ under heat and pressure preservation, so that a radial seal exists between the core and the core cabin, when the pressure preservation pressure is very high (for example, more than 100 MPa), the force required for taking the core out of the core cabin is very large (may weigh up to one ton), and in order to perform in-situ mechanical research on the core sample in the core cabin, the core sample in the core cabin must be transferred to an experimental device under the environment of heat and pressure preservation, so that a device for transferring the core sample from the core cabin to an experimental device (generally, a preparation cabin) under the conditions of high pressure and high temperature is required.
The existing pressure maintaining rock core transfer device and method and the natural gas hydrate rock core sample pressure maintaining transfer device are attempts to solve the problem, but the existing pressure maintaining rock core transfer device and the natural gas hydrate rock core sample pressure maintaining transfer device cannot provide large tensile force in principle so as to overcome huge friction force between a rock core sample which is not smooth in an ultrahigh pressure environment and a radial sealing element. Therefore we want to solve such a problem: under the condition of ultrahigh pressure and high temperature, the huge friction force between the core sample and the radial sealing element is overcome, and the core sample is transferred into laboratory equipment (generally a preparation cabin) from the core taking cabin.
Disclosure of Invention
The applicant provides an ultrahigh pressure and high temperature core sample transfer system and a working process thereof aiming at the defects in the prior art, so that the ultrahigh pressure and high temperature core sample transfer system can overcome the huge friction force between a sample core and a sealing element when the sample core is taken out from a coring cabin in an ultrahigh pressure and high temperature state, and the core sample transfer is realized.
The technical scheme adopted by the invention is as follows:
the ultrahigh-pressure high-temperature rock core sample transfer system comprises a transfer cabin, wherein the transfer cabin is an annular pressure-resistant cabin, one end of the transfer cabin is hermetically provided with a switch valve, the other end of the transfer cabin is hermetically connected with an oil cylinder barrel, a piston rod of the oil cylinder barrel penetrates through a cabin cover of the transfer cabin and then enters the interior of the transfer cabin, a piston of the oil cylinder barrel slides in the interior, the tail part of the oil cylinder barrel is provided with a rotating handle in a matched manner, and the outer wall surface of the oil cylinder barrel is provided with a water cooling sleeve in a matched manner; the outer end position sealing connection of ooff valve has core cabin or preparation cabin, it has the core to get in the core cabin, the head of core is provided with fixture, fixture corresponds and matches with the piston rod.
The further technical scheme is as follows:
the drive oil way of the oil cylinder barrel is as follows: the hydraulic control system comprises an electric ultrahigh pressure oil pump, wherein the electric ultrahigh pressure oil pump is connected with a rod cavity through a pipeline, and a check valve, an overflow valve and a rod cavity pressure gauge are sequentially arranged on the pipeline; still include the superhigh pressure hand pump, the first manual stop valve of output installation of superhigh pressure hand pump, the output branch of first manual stop valve becomes three routes, directly is connected with the rodless chamber of oil cylinder section of thick bamboo all the way to at this first way pipeline installation rodless chamber manometer, another way installation relief valve, the manual stop valve of second and backpressure valves are established ties all the way at last.
The clamping mechanism is of a smooth cylindrical structure, and the head of the clamping mechanism is provided with two groups of first double lugs and second double lugs which are staggered.
The first and second ears are spaced apart by L in the axial direction.
The piston rod head is provided with a circular ring structure, and a group of third double lugs is arranged inside the circular ring structure.
And the end surface of the piston is provided with a fourth double lug.
The outer diameter of the piston is the same as the diameter of the head of the rotary handle.
The two-stage stepped shaft structure of the rotating handle position is respectively a small step and a large step, the small step penetrates through an end cover of the oil cylinder barrel, the large step is tightly matched with the inner wall surface of the oil cylinder barrel through a sealing piece, and a fifth double lug is arranged on the outer end surface of the large step.
The end cover of the oil cylinder barrel is provided with a step, and the step is matched with the joint of the small step and the large step.
The working process of the ultrahigh-pressure high-temperature core sample transfer system comprises the following operation steps:
initial state: the switching valve is opened, the cabin is transferred at normal temperature and normal pressure, the electric ultrahigh pressure oil pump and the ultrahigh pressure manual pump do not work, and the piston rod extends out to the tail end;
connecting the outer ends of the coring cabin and the switch valve, then rotating the coring cabin by an angle to enable the first double lugs and the third double lugs to be abutted, then connecting and fastening the coring cabin and the switch valve, then starting a temperature and pressure control system of the transfer cabin to work, and heating the interior of the transfer cabin to be the same as the internal environment of the coring cabin; starting a system matched with the water cooling sleeve to work, and controlling the temperature of oil in the oil cylinder barrel to be below 60 ℃;
the piston rod is driven to move rightwards until the piston is abutted to the rotating handle;
the small ladder is rotated, so that the piston is driven to rotate until the third double lugs are abutted against the second double lugs;
the switch valve is turned off, the coring cabin is taken down, the preparation cabin and the outer end face of the switch valve are connected and sealed, and then the interior of the preparation cabin is heated and pressurized to be the same as the internal ambient pressure of the transfer cabin;
opening the switch valve, moving the piston rod leftwards, and pushing the core to completely enter the preparation cabin;
then the piston rod moves leftwards and retracts into the transfer cabin, and the switch valve is closed;
as above, the operation process of transferring the core sample from the interior of the coring compartment to the interior of the preparation compartment in the ultra-high pressure and high temperature environment is completed.
The invention has the following beneficial effects:
the core sample transfer device is compact and reasonable in structure and convenient to operate, the transfer work of a core sample can be conveniently completed through the mutual matching work of the transfer cabin, the oil cylinder barrel, the switch valve, the coring cabin and the preparation cabin, the huge friction force between the sample core and a sealing piece when the sample core is taken out of the coring cabin can be overcome under the ultrahigh pressure and high temperature state, the transfer of the core sample is realized, the operation is convenient, and the working reliability is good.
The core sample with the depth of thousands of meters is very expensive to obtain, and the sample core under the ultrahigh pressure environment has huge friction with the sealing element when being taken out from the core taking cabin.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a diagram of the process of transferring a core sample from a coring compartment to a preparation compartment of the present invention.
FIG. 3 is a diagram of the process of transferring a core sample from a coring compartment to a preparation compartment of the present invention (two).
FIG. 4 is a diagram of the process of transferring a core sample from a coring compartment into a preparation compartment of the present invention (III).
FIG. 5 is a diagram of the process of transferring a core sample from a coring compartment to a preparation compartment of the present Invention (IV).
FIG. 6 is a diagram of the process of transferring a core sample from a coring compartment into a preparation compartment according to the present invention (five).
Figure 7 is a schematic view of the construction of the core head of the invention.
Fig. 8 is a partial structural view of the piston rod according to the present invention.
Fig. 9 is a partial structure diagram of the piston of the present invention.
Fig. 10 is a partial structure diagram of the turning handle of the invention.
FIG. 11 is a schematic view of the piston driven by the rotating handle of the present invention.
Fig. 12 is a full sectional view taken along section a-a in fig. 11.
Figure 13 is a schematic view of the mutual position of the piston rod head and the core head in an initial state of the piston rod according to the invention;
figure 14 is a schematic view of the mutual position of the piston rod head and the core head when the piston rod pulls the core to the right according to the invention.
Figure 15 is a schematic view of the mutual position of the piston rod head and the core head when the piston rod is pushing the core to the left.
Wherein: 1. a coring compartment; 2. a core; 3. an on-off valve; 4. a transfer chamber; 5. a piston rod; 6. a piston; 7. water cooling jacket; 8. an oil cylinder barrel; 9. rotating the handle; 10. a rodless chamber pressure gauge; 11. a safety valve; 12. an ultra-high pressure manual pump; 13. a first manual stop valve; 14. a second manual shutoff valve; 15. a back pressure valve bank; 16. a rod cavity pressure gauge; 17. an electric super high pressure oil pump; 18. an overflow valve; 19. a check valve; 20. preparing a cabin;
201. a clamping mechanism;
20101. a first two ears; 20102. a second binaural;
401. a hatch cover;
501. a third binaural;
601. a fourth binaural;
901. a small step; 902. a large step; 903. and a fifth binaural.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 15, the ultrahigh-pressure high-temperature core sample transfer system of the embodiment includes a transfer cabin 4, the transfer cabin 4 is an annular pressure-resistant cabin, one end of the transfer cabin 4 is hermetically provided with a switch valve 3, the other end of the transfer cabin 4 is hermetically connected with an oil cylinder barrel 8, a piston rod 5 of the oil cylinder barrel 8 passes through a cabin cover 401 of the transfer cabin 4 and then enters the interior of the transfer cabin 4, a piston 6 of the oil cylinder barrel 8 slides inside, the tail of the oil cylinder barrel 8 is cooperatively provided with a rotating handle 9, and the outer wall surface of the oil cylinder barrel 8 is cooperatively provided with a water cooling jacket 7; the outer end position sealing connection of ooff valve 3 has coring cabin 1 or preparation cabin 20, has core 2 in coring cabin 1, and the head of core 2 is provided with fixture 201, and fixture 201 corresponds and matches with piston rod 5.
The driving oil path of the oil cylinder barrel 8 is as follows: the device comprises an electric ultrahigh-pressure oil pump 17, wherein the electric ultrahigh-pressure oil pump 17 is connected with a rod cavity through a pipeline, and a check valve 19, an overflow valve 18 and a rod cavity pressure gauge 16 are sequentially arranged on the pipeline; still include superhigh pressure manual pump 12, the first manual stop valve 13 of output installation of superhigh pressure manual pump 12, the output branch of first manual stop valve 13 becomes three routes, directly is connected with the rodless chamber of oil cylinder section of thick bamboo 8 all the way to install rodless chamber manometer 10 on this first way pipeline, another way installation relief valve 11, the manual stop valve 14 of second and backpressure valves 15 are established ties all the way at last.
The clamping mechanism 201 is of a smooth cylindrical structure, and two groups of first double lugs 20101 and second double lugs 20102 which are staggered are arranged at the head of the clamping mechanism 201.
The distance between the first double lug 20101 and the second double lug 20102 in the axial direction is L.
The head of the piston rod 5 is provided with a circular ring structure, and a group of third double lugs 501 is arranged inside the circular ring structure.
The end surface of the piston 6 is provided with a fourth double lug 601.
The outer diameter of the piston 6 is the same as the diameter of the head of the turning handle 9.
A9-position two-stage stepped shaft structure of a rotating handle is respectively a small step 901 and a large step 902, the small step 901 penetrates through an end cover of the oil cylinder barrel 8, the large step 902 is tightly matched with the inner wall surface of the oil cylinder barrel 8 through a sealing piece, and a fifth double lug 903 is arranged on the outer end surface of the large step 902.
The end cover of the oil cylinder barrel 8 is provided with a step, and the step is matched with the joint of the small step 901 and the large step 902.
The working process of the ultrahigh-pressure and high-temperature core sample transfer system comprises the following operation steps:
initial state: the switching valve 3 is opened, the interior of the transfer cabin 4 is at normal temperature and normal pressure, the electric ultrahigh-pressure oil pump 17 and the ultrahigh-pressure manual pump 12 do not work, and the piston rod 5 extends out to the tail end;
connecting the outer ends of the coring cabin 1 and the switch valve 3, then rotating the coring cabin 1 by an angle to enable the first double lug 20101 to be abutted against the third double lug 501, then connecting and fastening the coring cabin 1 and the switch valve 3, then starting a temperature and pressure control system of the transfer cabin 4 to work, and heating the interior of the transfer cabin 4 to be the same as the interior environment of the coring cabin 1; a system matched with the water cooling sleeve 7 is started to work, and the temperature of oil in the oil cylinder barrel 8 is controlled to be below 60 ℃;
the piston rod 5 is driven to move rightwards until the piston 6 is abutted with the rotating handle 9;
the small step 901 is rotated, so that the piston 6 is driven to rotate until the third double lug 501 abuts against the second double lug 20102;
the switch valve 3 is turned off, the coring cabin 1 is taken down, the preparation cabin 20 and the outer end face of the switch valve 3 are connected and sealed, and then the interior of the preparation cabin 20 is heated and pressurized to be the same as the ambient pressure of the interior of the transfer cabin 4;
opening the switch valve 3, moving the piston rod 5 leftwards to push the core 2 to enter the preparation cabin 20 completely;
then the piston rod 5 moves leftwards and retracts into the transfer cabin 4, and the switch valve 3 is closed;
as above, the operation of transferring the core 2 from the inside of the coring compartment 1 to the inside of the preparation compartment 20 under the ultra-high pressure and high temperature environment is completed.
The specific structure and function of the ultrahigh-pressure high-temperature core sample transfer system are as follows:
the transfer cabin 4 is a circular pressure-resistant cabin, the left side of the transfer cabin is hermetically connected with the switch valve 3, and the right side of the transfer cabin is hermetically connected with the oil cylinder barrel 8; the piston rod 5 extends out of the cover of the oil cylinder barrel 8 and then passes through the transfer cabin cover 401 to enter the transfer cabin 4; the rotary handle 9 is of a two-stage stepped shaft structure, the diameter of the large step 902 is the same as that of the piston 6, the large step 902 and the piston 6 are radially sealed with an inner hole of the oil cylinder barrel 8, the small step 901 penetrates through an end cover at the bottom of the oil cylinder barrel 8, and the fit clearance between the small step 901 and the oil cylinder barrel is 0.2-1 mm; the water cooling jacket 7 is annularly coated on the outer wall of the oil cylinder barrel 8 close to the part of the transfer cabin 4.
The left side of the switch valve 3 can be respectively connected with the coring cabin 1 and the preparation cabin 20 in a sealing way.
The driving oil way of the oil cylinder is as follows: the outlet of the electric ultrahigh pressure oil pump 17 is connected with an overflow valve 18, a pressure gauge 16 with a rod cavity and an oil cylinder rod cavity in series after being connected with a check valve 19; the outlet of the ultrahigh pressure manual pump 12 is connected with a first manual stop valve 13 in series and then connected with a safety valve 11, a rodless cavity pressure gauge 10, a second manual stop valve 14 and an oil cylinder rodless cavity; the other end of the second manual stop valve 14 is connected in series with a backpressure valve set 15 and then is led into an oil tank; the oil port of the rodless cavity of the oil cylinder is arranged between the piston 6 and the rotating handle 9.
The head of the core 2 is provided with a clamping mechanism 201, two groups of identical but orthogonal first double ears 20101 and second double ears 20102 are arranged on the clamping mechanism 201, the double ears are partial central axis symmetric segments on a circular ring with an inner diameter d2 and an outer diameter d1, the distance between the first double ears 20101 and the second double ears 20102 is L, and the rest of the clamping mechanism 201 is of a smooth cylindrical structure with a diameter d 2.
The head of the piston rod 5 is of a circular structure with the inner diameter of D1, a third double lug 501 is arranged on the circular structure, the double lugs are partial central axis symmetric segments on a circular ring with the inner diameter of D2 and the outer diameter of D1, and the thickness of the third double lug 501 is h; l is 20-30 mm larger than h; d1 is 5-10 mm larger than D1, and D2 is 5-10 mm smaller than D2.
The end face of the large ladder 902 is provided with a fifth double lug 903, the end face of the piston 6 is provided with a fourth double lug 601 which are basically the same and are partial axisymmetric segments on a circular ring with an inner diameter d3 and an outer diameter d4, and the height of the fourth double lug 601 is 5-10 mm higher than that of the fifth double lug 903.
The oil for the oil cylinder driving loop is heat conducting oil with the highest temperature not exceeding 300 ℃, such as a great wall brand L0QB 300; the pressure set by the overflow valve 18 is 50% -80% of the internal pressure of the transfer cabin 4, and the maximum pressure can not exceed 80 MPa.
The working principle of the oil cylinder is as follows:
first, when the piston rod 5 moves to the left: the second manual stop valve 14 is closed, the first manual stop valve 13 is opened, the ultrahigh pressure manual pump 12 works, pressure oil enters the rodless cavity, the piston rod 5 is pushed to move leftwards, the moving speed is controlled by the ultrahigh pressure manual pump 12, and the safety valve 11 only plays a role in safety at the moment; meanwhile, the electric ultrahigh-pressure oil pump 17 works, the oil in the rod cavity and the oil pumped by the electric ultrahigh-pressure oil pump 17 overflow through the overflow valve 18, and the pressure in the rod cavity is the set pressure of the overflow valve 18, so that the pressure difference between the left side and the right side of the hatch cover 401 can be reduced, and the service life and the working reliability of a radial sealing element between the piston rod 5 and the hatch cover 401 are facilitated; because the piston rod 5 bears the internal environmental pressure of the transfer cabin 4, the pressure of the rod cavity is 50-80% of the internal environmental pressure of the transfer cabin 4 (the maximum pressure is not more than 80MPa), the working pressure of the rodless cavity can be lower than 80MPa by setting the appropriate area ratio of the piston rod 5 and the piston 6, and the maximum working pressure of the oil cylinder is not more than 80MPa without special design;
(II) when the piston rod 5 moves rightwards: the first manual stop valve 13 is closed, the second manual stop valve 14 is opened, the piston rod 5 moves rightwards under the action of the internal environment pressure of the transfer cabin 4, and the backpressure valve group 15 controls the rightwards movement speed of the piston rod 5 by providing proper backpressure; at the moment, the electric ultrahigh-pressure oil pump 17 works, one part of pumped oil enters the rod cavity for supplement, the other part of pumped oil overflows through the overflow valve 18, and the pressure of the rod cavity is the set pressure of the overflow valve 18, so that the pressure difference of the left side and the right side of the hatch cover 401 can be reduced, and the service life and the working reliability of a radial sealing element between the piston rod 5 and the hatch cover 401 are facilitated.
The above description is intended to be illustrative, and not restrictive, the scope of the invention being indicated by the claims, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The utility model provides an ultrahigh pressure high temperature core sample transfer system which characterized in that: the transfer cabin is characterized by comprising a transfer cabin (4), wherein the transfer cabin (4) is an annular pressure-resistant cabin, one end of the transfer cabin (4) is hermetically provided with a switch valve (3), the other end of the transfer cabin (4) is hermetically connected with an oil cylinder barrel (8), a piston rod (5) of the oil cylinder barrel (8) penetrates through a cabin cover (401) of the transfer cabin (4) and then enters the interior of the transfer cabin (4), a piston (6) of the oil cylinder barrel (8) slides in the interior, the tail part of the oil cylinder barrel (8) is provided with a rotating handle (9) in a matched mode, and the outer wall surface of the oil cylinder barrel (8) is provided with a water cooling sleeve (7) in a matched mode; the outer end position of the switch valve (3) is hermetically connected with a coring cabin (1) or a preparation cabin (20), a rock core (2) is arranged in the coring cabin (1), the head of the rock core (2) is provided with a clamping mechanism (201), and the clamping mechanism (201) corresponds to and is matched with the piston rod (5); the driving oil way of the oil cylinder barrel (8) is as follows: the hydraulic control system comprises an electric ultrahigh pressure oil pump (17), wherein the electric ultrahigh pressure oil pump (17) is connected with a rod cavity through a pipeline, and a check valve (19), an overflow valve (18) and a rod cavity pressure gauge (16) are sequentially arranged on the pipeline; still include superhigh pressure manual pump (12), first manual stop valve (13) of output installation of superhigh pressure manual pump (12), the output branch of first manual stop valve (13) becomes three routes, directly is connected with the rodless chamber of oil cylinder section of thick bamboo (8) all the way to install rodless chamber manometer (10) on this first way pipeline, relief valve (11) are installed to another way, establish ties second manual stop valve (14) and backpressure valves (15) all the way at last.
2. The ultra-high pressure high temperature core sample transfer system of claim 1, wherein: the clamping mechanism (201) is of a smooth cylindrical structure, and two groups of first double lugs (20101) and second double lugs (20102) which are staggered are arranged at the head of the clamping mechanism (201).
3. The ultra-high pressure high temperature core sample transfer system of claim 2, wherein: the first double ear (20101) and the second double ear (20102) are spaced apart by L in the axial direction.
4. The ultra-high pressure high temperature core sample transfer system of claim 1, wherein: the head of the piston rod (5) is provided with a circular ring structure, and a group of third double lugs (501) are arranged inside the circular ring structure.
5. The ultra-high pressure high temperature core sample transfer system of claim 1, wherein: the end surface of the piston (6) is provided with a fourth double lug (601).
6. The ultra-high pressure high temperature core sample transfer system of claim 1, wherein: the outer diameter of the piston (6) is the same as the diameter of the head of the rotating handle (9).
7. The ultra-high pressure high temperature core sample transfer system of claim 1, wherein: the two-stage stepped shaft structure of the rotary handle (9) is respectively a small step (901) and a large step (902), the small step (901) penetrates through an end cover of the oil cylinder barrel (8), the large step (902) is tightly matched with the inner wall surface of the oil cylinder barrel (8) through a sealing piece, and a fifth double lug (903) is arranged on the outer end surface of the large step (902).
8. The ultra-high pressure high temperature core sample transfer system of claim 7, wherein: the end cover of the oil cylinder barrel (8) is provided with a step, and the step is matched with the joint of the small step (901) and the large step (902).
9. An operation process using the ultra-high pressure and high temperature core sample transfer system according to claim 1, wherein: the method comprises the following operation steps:
initial state: the switching valve (3) is opened, the interior of the transfer cabin (4) is at normal temperature and normal pressure, the electric ultrahigh pressure oil pump (17) and the ultrahigh pressure manual pump (12) do not work, and the piston rod (5) extends out to the tail end;
connecting the outer ends of the coring cabin (1) and the switch valve (3), then rotating the coring cabin (1) by an angle to enable the first double lug (20101) and the third double lug (501) to be abutted, then connecting and fastening the coring cabin (1) and the switch valve (3), then starting a temperature and pressure control system of the transfer cabin (4) to work, and heating the inside of the transfer cabin (4) to be the same as the internal environment of the coring cabin (1); a system matched with the water cooling sleeve (7) is started to work, and the temperature of oil in the oil cylinder barrel (8) is controlled to be below 60 ℃;
the piston rod (5) is driven to move rightwards until the piston (6) is abutted with the rotating handle (9);
the small step (901) is rotated, so that the piston (6) is driven to rotate until the third double lug (501) is abutted against the second double lug (20102);
the switch valve (3) is turned off, the coring cabin (1) is taken down, the preparation cabin (20) and the outer end face of the switch valve (3) are connected and sealed, and then the interior of the preparation cabin (20) is heated and pressurized to be the same as the internal environmental pressure of the transfer cabin (4);
opening the switch valve (3), moving the piston rod (5) leftwards, and pushing the rock core (2) to completely enter the preparation cabin (20);
then the piston rod (5) moves leftwards and retracts into the transfer cabin (4), and the switch valve (3) is closed;
as above, the operation process of transferring the core sample from the inside of the coring compartment (1) to the inside of the preparation compartment (20) in the ultra-high pressure and high temperature environment is completed.
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| CN113803009B (en) * | 2021-09-30 | 2022-05-10 | 四川大学 | High-temperature and high-pressure environment simulation cabin for large calibration rock sample |
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| CN110924886B (en) * | 2019-11-25 | 2021-08-20 | 南华大学 | Deep sea mining is with fidelity coring device |
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