CN113137196B - High-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device - Google Patents
High-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device Download PDFInfo
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- CN113137196B CN113137196B CN202110477163.9A CN202110477163A CN113137196B CN 113137196 B CN113137196 B CN 113137196B CN 202110477163 A CN202110477163 A CN 202110477163A CN 113137196 B CN113137196 B CN 113137196B
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- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 84
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 125000006850 spacer group Chemical group 0.000 claims description 28
- 238000002955 isolation Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 description 12
- 238000011065 in-situ storage Methods 0.000 description 11
- 238000005553 drilling Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000227287 Elliottia pyroliflora Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- -1 physical mechanics Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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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)
- Geophysics (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device which comprises a rotary linear motion shaft, wherein the rotary linear motion shaft is connected with a hydraulic motor through a gear box to realize the rotary motion of the shaft; the upper end of the rotary linear motion shaft passes through the gear box to be connected with the linear reciprocating motion driving mechanism, and the linear reciprocating motion driving mechanism is connected with the control system to realize the linear reciprocating motion of the shaft; a liquid outlet of the hydraulic motor is connected with the oil liquid cooling system; the first pressure reducing interface and the second pressure reducing interface on the rotary sealing cabin body are connected with a cooling pool through overflow valves, the cooling pool is connected with a temperature-rising pressure supply system, and the temperature-rising pressure supply system is connected with the first liquid supply port and the second liquid supply port respectively. The scheme provides a two-stage pressure reduction dynamic seal (rotation plus reciprocating linear) device, which can realize dynamic seal with the pressure of 140MPa and the temperature of 150 ℃; meanwhile, the device can be used for researching and developing high-temperature ultrahigh-pressure rotary sealing rings with different structures and verifying the sealing capability of the high-temperature ultrahigh-pressure rotary sealing rings.
Description
Technical Field
The invention relates to the technical field of drilling, in particular to a high-temperature ultrahigh-pressure rotating linear reciprocating dynamic seal testing device.
Background
The deep requirement of energy resources is the most urgent practical problem in China at present, is also a major strategic and scientific problem in China, and is particularly a major energy safety problem in China. The in-situ rock mechanical behavior rule of different-depth occurrence rock layers is the guiding science and the important theoretical basis of deep drilling, deep resource development and utilization and earth application science, and the core and the key of the in-situ rock mechanical behavior rule are how to obtain an in-situ rock core under a deep environment condition and carry out real-time loading test and analysis under an in-situ fidelity state. The characteristics of deep rock such as physical mechanics, chemical biology and the like are closely related to the in-situ environmental conditions, the existing coring equipment can cause the phenomenon of rock core stress state damage or stress release when drilling the deep rock core, and the authenticity of the rock core ground stress information and the pore pressure information is damaged by strong mechanical disturbance. Meanwhile, the existing coring equipment cannot maintain pressure and heat, so that gas-liquid phase information and microorganism information contained in the in-situ rock core are distorted, in-situ rock core component information and occurrence state information cannot be completely and scientifically acquired, and the uncertainty of deep scientific research is greatly increased.
In the lifting process of the fidelity coring equipment after the 'in-situ core' rotary drilling and coring is carried out, because the dynamic sealing performance between the deep in-situ heat-insulation high-pressure environment simulation cabin and the end structure of the fidelity coring tool is insufficient, the high-temperature high-pressure fluid in the simulation experiment cabin has overflow risks, and environmental parameters such as the pressure and the temperature of the core storage cabin fluctuate, so that the core can not keep the state of the core in the deep in-situ environment. Therefore, in order to obtain the in-situ rock core with deep scientific research value, the dynamic rotary sealing performance between the coring tool and the simulation cabin needs to be researched to ensure that the tested dynamic sealing structure can reach the preset dynamic sealing performance under the conditions of high temperature and high pressure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-temperature ultrahigh-pressure rotating linear reciprocating dynamic seal testing device which can verify the performance of a dynamic seal structure during simulation of deep fidelity coring.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device comprises a rotary linear motion shaft, wherein the rotary linear motion shaft is connected with a hydraulic motor through a gear box to realize the rotary motion of the rotary linear motion shaft; the liquid outlet of the hydraulic motor is connected with an oil cooling system, the oil cooling system is connected with a driving pump station, and the driving pump station is connected with the liquid inlet of the hydraulic motor; the first pressure reducing interface and the second pressure reducing interface of the rotary sealing cabin body are connected with a cooling pool through overflow valves, the cooling pool is connected with a temperature-rising pressure supply system, and the temperature-rising pressure supply system is connected with the first liquid supply port and the second liquid supply port respectively.
The invention has the beneficial effects that: the scheme provides a two-stage pressure reduction dynamic seal (rotation plus reciprocating linear) device, which can realize dynamic seal with the pressure of 140MPa and the temperature of 150 ℃; meanwhile, the device can be used for researching and developing high-temperature ultrahigh-pressure rotary sealing rings with different structures and verifying the sealing capability of the high-temperature ultrahigh-pressure rotary sealing rings. The linear reciprocating motion actuating mechanism drive shaft carries out the action of carrying the core from top to bottom, and the hydraulic motor drive shaft rotates, and the intensification supplies the pressure system to provide high pressure and high temperature environment for rotatory moving sealed cabin is internal, simulates out real underground deep and gets the core environment, and the high-temperature and high-pressure medium passes through overflow valve and cooling tank to step down and cool down simultaneously, realizes the cyclic utilization of medium.
The scheme can simulate the severe working conditions of slurry, crude oil and the like containing granular media, and ensure the sealing performance of the rotary sealing cabin. The shaft, the spacer bush, the isolation ring and the first sealing ring form a nested structure, can adapt to various sealing structure forms, and has good sealing effect. Effective sealing can be ensured at each position, the sealing amount is not influenced by the deformation of the mechanism, and the sealing device is safer and has higher reliability.
Drawings
FIG. 1 is a structural diagram of a high-temperature ultrahigh-pressure rotating linear reciprocating dynamic seal testing device.
Fig. 2 is a structural view of a rotary dynamic sealing cabin.
The device comprises a cabin cover, a first decompression port, a first dust ring, a second dust ring, a spacer bush, a first shaft cavity, a second shaft cavity, a first liquid supply port, a second liquid supply port, a first liquid supply port, a second liquid supply port, a cabin seat, a pulse dissipation pool, a second sealing ring, a copper bush, a first cabin head, a first sealing ring, a second sealing ring, a third sealing ring, a protruding part, a fourth sealing ring, a sealing plug, a second cabin head, a second decompression port, a second sealing ring, a third sealing ring, a sealing plug, a lower end cover, a second cabin head, a linear reciprocating motion driving mechanism, a second sealing plug, a third sealing plug, a second cabin head, a second decompression port, a fourth sealing ring, a third sealing plug, a lower end cover, a linear reciprocating motion driving mechanism, a control system, a hydraulic motor, a rotary motion cabin body, a hydraulic motor, a rotary motion cabin body, a driving pump station, a gear box, a dust ring, an overflow valve, a dust ring, a spacer bush, a spacer bush, a spacer bush, a spacer bush, a spacer bush, a spacer bush, a spacer.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1 and 2, the high-temperature ultrahigh-pressure rotary linear reciprocating seal testing device of the present scheme includes a rotary linear motion shaft 15, the rotary linear motion shaft 15 is connected to a hydraulic motor 26 through a gear box 30 to realize the rotary motion of the rotary linear motion shaft 15, the upper end of the rotary linear motion shaft 15 passes through the gear box 30 to be connected to a linear reciprocating motion driving mechanism 24, the linear reciprocating motion driving mechanism 24 is connected to a control system 25, and the rotary linear motion shaft 15 performs linear reciprocating motion; a liquid outlet of the hydraulic motor 26 is connected with an oil cooling system 28, the oil cooling system 28 is connected with a driving pump station 29, and the driving pump station 29 is connected with a liquid inlet of the hydraulic motor 26; the rotary linear motion shaft 15 is arranged in the rotary dynamic seal cabin body 17, the first pressure reducing interface 2 and the second pressure reducing interface 21 of the rotary dynamic seal cabin body 27 are both connected with a cooling pool 33 through an overflow valve 31, the cooling pool 33 is connected with a temperature-rising pressure supply system 32, and the temperature-rising pressure supply system 32 is respectively connected with the first liquid supply port 7 and the second liquid supply port 6.
The rotary sealing cabin comprises a cabin seat 8, a first cabin head 12 is arranged at the upper end of the cabin seat 8, a second cabin head 20 is arranged at the upper end of the first cabin head 12, and a first shaft cavity 5 and a second shaft cavity which penetrate through the first cabin head 12 and the second cabin head 20 are respectively arranged on the first cabin head 12 and the second cabin head 20; the cabin seat 8 is provided with a pulse dissipation pool 9, the lower end of the first shaft cavity 5 is communicated with the pulse dissipation pool 9, and the rotary linear motion shaft 15 is arranged in the first shaft cavity 5 and the second shaft cavity.
The first liquid supply port 7 is formed in the pulse dissipation pool 9, and the second liquid supply port 6 and the second pressure reduction port 21 are formed in the middle of the first shaft cavity 5 and the middle of the second shaft cavity respectively; the rotary linear motion shaft 15 is connected with the first shaft cavity 5 through a first sealing mechanism, and the rotary linear motion shaft 15 is connected with the second shaft cavity through a second sealing mechanism.
The upper end of the first sealing mechanism is packaged through a cabin cover 1, the cabin cover 1 is installed in a cover seat, the lower end of the second cabin head 20 is packaged through a lower end cover 23, the upper end of the second sealing mechanism is packaged through a sealing plug 19, and the cabin cover 1, the lower end cover 23 and the sealing plug 19 are all sleeved on the rotating linear motion shaft 15.
The first sealing mechanism and the second sealing mechanism both comprise spacer bushes 4, and the lower ends of the spacer bushes 4 are placed on the pillow blocks arranged in the first shaft cavity 5 and the second shaft cavity; a gap is arranged between the upper end of the spacer 4 and the rotary linear motion shaft 15, a plurality of layers of first sealing rings 13 are arranged in the gap, an isolation ring 14 is arranged between each first sealing ring 13, and a slurry medium sealing element is filled in the gap between each isolation ring 14 and each first sealing ring 13.
A fourth sealing ring is arranged between the lower end of the spacer 4 and the rotary linear motion shaft 15, and the space between the spacer 4 and the rotary linear motion shaft 15 is sealed; a dustproof ring 3 is arranged between the spacer 4 and the inner walls of the first shaft cavity 5 and the second shaft cavity, and the dustproof ring 3 is sleeved on the spacer 4; and external media are prevented from entering the shaft cavity through the gap between the spacer 4 and the shaft cavity.
Three layers of sealing rings are arranged between the inner wall of the spacer 4 and the rotating linear motion shaft 15, the sealing rings are separated by two isolation rings 14, and the sealing rings are placed on a ring platform arranged in the spacer 4.
The lower end of the rotary linear motion shaft 15 is connected with the inner wall of the first shaft cavity 5 through a copper sleeve 11, the lower end of the copper sleeve 11 is provided with a hanging ring, the inner wall of the first shaft cavity 5 is provided with a boss, the hanging ring is buckled at the lower end of the boss, and the copper sleeve 11 is matched with the boss; in the process of core lifting by rotating the linear motion shaft 15, the copper sleeve 11 is hung on the boss and cannot move axially.
The lower end of the first shaft cavity 5 is provided with a protruding part 17, the protruding part 17 extends into the pulse dissipation pool 9, and a second sealing ring 10 is arranged between the protruding part 17 and the upper end of the pulse dissipation pool 9, so that the sealing performance between the cabin seat 8 and the first cabin head 12 is ensured. The upper end of the first shaft cavity 5 is provided with a first pressure reducing interface 2 connected with the overflow valve 31, so that the pressure in the first shaft cavity 5 and the pressure in the second shaft cavity are controlled, and the pressure stability is ensured.
A third sealing ring 16 is arranged between the lower end of the hatch cover 1 and the cover seat, a fifth sealing ring 18 is arranged between the sealing plug 19 and the second shaft cavity, and a sixth sealing ring is arranged between the lower end cover 23 and the second hatch head 20; a seventh sealing ring 22 is provided between the sealing plug 19 and the rotational linear motion shaft 15.
The scheme is used for researching the dynamic sealing performance of underground deep drilling work and obtaining the dynamic sealing performance parameters of the fidelity rock core in a real environment, and the high-temperature ultrahigh-pressure environment of the scheme is 150 ℃ and 140 MPa. The linear reciprocating motion driving mechanism 24 drives the rotary linear motion shaft 15 to perform up-and-down core lifting action, the hydraulic motor 26 drives the rotary linear motion shaft 15 to rotate, the heating and pressure supplying system 32 provides high-pressure and high-temperature environment for the rotary dynamic sealing cabin body 27, real underground deep core taking environment is simulated, and meanwhile high-temperature and high-pressure media are subjected to pressure reduction and temperature reduction through the overflow valve 31 and the cooling pool 33, so that the recycling of the media is realized.
The scheme can simulate the severe working conditions of slurry, crude oil and the like containing granular media, and ensure the sealing performance of the rotary direct-rotary sealing cabin body. The shaft, the spacer bush, the isolation ring and the first sealing ring form a nested structure, can adapt to various sealing structure forms, and has good sealing effect. Effective sealing can be ensured at each position, the sealing amount is not influenced by the deformation of the mechanism, and the sealing device is safer and has higher reliability.
Claims (9)
1. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device is characterized by comprising a rotary linear motion shaft, wherein the rotary linear motion shaft is connected with a hydraulic motor through a gear box to realize the rotary motion of the rotary linear motion shaft, the upper end of the rotary linear motion shaft penetrates through the gear box to be connected with a linear reciprocating motion driving mechanism, the linear reciprocating motion driving mechanism is connected with a control system, and the rotary linear motion shaft performs linear reciprocating motion; the liquid outlet of the hydraulic motor is connected with an oil liquid cooling system, the oil liquid cooling system is connected with a driving pump station, and the driving pump station is connected with the liquid inlet of the hydraulic motor; the rotary linear motion shaft is arranged in the rotary dynamic seal cabin body, a first pressure reducing interface and a second pressure reducing interface on the rotary dynamic seal cabin body are both connected with a cooling pool through overflow valves, the cooling pool is connected with a temperature and pressure raising and supplying system, and the temperature and pressure raising and supplying system is respectively connected with a first liquid supply port and a second liquid supply port;
the rotary sealed cabin comprises a cabin seat, a first cabin head is arranged at the upper end of the cabin seat, a second cabin head is arranged at the upper end of the first cabin head, and a first shaft cavity and a second shaft cavity which penetrate through the first cabin head and the second cabin head are respectively arranged on the first cabin head and the second cabin head; a pulse dissipation pool is arranged on the cabin seat, the lower end of the first shaft cavity is communicated with the pulse dissipation pool, and the shaft is arranged in the first shaft cavity and the second shaft cavity; the first liquid supply port is formed in the pulse dissipation pool, and the second liquid supply port and the second pressure reduction port are respectively formed in the middle of the first shaft cavity and the middle of the second shaft cavity; the shaft is connected with the first shaft cavity through a first sealing mechanism, and the shaft is connected with the second shaft cavity through a second sealing mechanism; the upper end of the first sealing mechanism is packaged through a hatch cover, the hatch cover is installed in a cover seat, the lower end of the second hatch head is packaged through a lower end cover, the upper end of the second sealing mechanism is packaged through a sealing plug, and the hatch cover, the lower end cover and the sealing plug are all sleeved on a shaft.
2. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device according to claim 1, wherein the first sealing mechanism and the second sealing mechanism comprise spacer bushes, and the lower ends of the spacer bushes are placed in the first shaft cavity and the second shaft cavity and provided with pillow blocks; a gap is formed between the upper end of the spacer bush and the shaft, a plurality of layers of first sealing rings are arranged in the gap, an isolation ring is arranged between each two adjacent first sealing rings, and a slurry medium sealing element is filled in the gap between each isolation ring and each first sealing ring.
3. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device according to claim 2, wherein a fourth sealing ring is arranged between the lower end of the spacer bush and the shaft.
4. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device according to claim 2, wherein a dustproof ring is arranged between the spacer bush and the inner walls of the first shaft cavity and the second shaft cavity, and the dustproof ring is sleeved on the spacer bush.
5. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device according to claim 2, wherein three layers of seal rings are arranged between the inner wall of the spacer bush and the shaft, the seal rings are separated by two isolation rings, and the seal rings are placed on a ring table arranged in the spacer bush.
6. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device as recited in claim 1, wherein the lower end of the shaft is connected with the inner wall of the first shaft cavity through a copper sleeve, the lower end of the copper sleeve is provided with a hanging ring, the inner wall of the first shaft cavity is provided with a boss, the hanging ring is buckled at the lower end of the boss, and the copper sleeve is matched with the boss.
7. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device as claimed in claim 1, wherein a protruding part is arranged at the lower end of the first shaft cavity, the protruding part extends into the pulse dissipation pool, and a second sealing ring is arranged between the protruding part and the upper end of the pulse dissipation pool.
8. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device according to claim 1, wherein a first pressure reducing interface connected with an overflow valve is formed at the upper end of the first shaft cavity.
9. The high-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device according to claim 1, wherein a third seal ring is arranged between the lower end of the cabin cover and the cover seat, a fifth seal ring is arranged between the seal plug and the second shaft cavity, a sixth seal ring is arranged between the lower end cover and the second cabin head, and a seventh seal ring is arranged between the seal plug and the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110477163.9A CN113137196B (en) | 2021-04-29 | 2021-04-29 | High-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110477163.9A CN113137196B (en) | 2021-04-29 | 2021-04-29 | High-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device |
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| CN113137196A CN113137196A (en) | 2021-07-20 |
| CN113137196B true CN113137196B (en) | 2022-04-22 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598777A (en) * | 1983-07-13 | 1986-07-08 | Diamond Oil Well Drilling Company | Method and apparatus for preventing contamination of a coring sponge |
| SU1203233A1 (en) * | 1984-02-17 | 1986-01-07 | Донецкий Ордена Трудового Красного Знамени Политехнический Институт | Device for obtaining cores and gas samples |
| JPS60200144A (en) * | 1984-03-23 | 1985-10-09 | Kiso Jiban Consultant Kk | Ground pressure balance type ground specimen sampling method |
| CN2367842Y (en) * | 1999-03-16 | 2000-03-08 | 四川太兴房屋开发有限公司 | Compound motive sealing device of superhigh pressure reciprocating rod |
| RU2188299C2 (en) * | 2000-04-27 | 2002-08-27 | Левшин Тимофей Сергеевич | Core sampler |
| CN200958379Y (en) * | 2006-09-30 | 2007-10-10 | 长沙矿山研究院 | Deep sea hard rock fidelity corer |
| CN109113613B (en) * | 2018-09-03 | 2020-06-12 | 吉林大学 | Natural gas hydrate rotary type freezing pressure maintaining rope coring drilling tool and coring method |
| CN109184608A (en) * | 2018-09-12 | 2019-01-11 | 四川大学 | Core displacement cabin in situ and core displacement method |
| CN111503276A (en) * | 2020-06-03 | 2020-08-07 | 江苏科技大学 | Ultrahigh pressure reciprocating sealing test device |
| CN111504701A (en) * | 2020-06-05 | 2020-08-07 | 深圳大学 | Ultrahigh pressure simulation experiment system of fidelity coring device |
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2021
- 2021-04-29 CN CN202110477163.9A patent/CN113137196B/en active Active
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