CN112763391B - Variable-diameter core holder - Google Patents
Variable-diameter core holder Download PDFInfo
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- CN112763391B CN112763391B CN202011582084.6A CN202011582084A CN112763391B CN 112763391 B CN112763391 B CN 112763391B CN 202011582084 A CN202011582084 A CN 202011582084A CN 112763391 B CN112763391 B CN 112763391B
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- 239000012530 fluid Substances 0.000 claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000007704 transition Effects 0.000 claims abstract description 22
- 239000011435 rock Substances 0.000 claims description 36
- 230000035699 permeability Effects 0.000 abstract description 7
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 238000002474 experimental method Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012826 global research Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a variable-diameter core holder, which is sequentially connected with a first plug, a first cushion block, a first core barrel, a second cushion block and a second plug on the holder, wherein a fluid channel connected with the first core barrel is arranged at the axial position of the first plug and the first cushion block, the first plug is connected with a taper sleeve, the first barrel is connected with the taper sleeve, a core is placed in an annular pressure cavity, a cross-shaped diversion trench is formed at one end of the first cushion block, which is in contact with the core, a transition taper sleeve is arranged in the first core barrel and the second core barrel, the first core barrel is connected with the transition taper sleeve, an annular sealing ring is arranged on the first barrel, the second core barrel is connected with the second transition taper sleeve, and an annular sealing ring is arranged on the second core barrel. The core holder has the advantages of simple structure and convenience in use, and can completely seal the core and determine the combined permeability of fluid passing through the combined core. The core with two diameters is allowed to be combined for use, and key physical parameters such as pressure and the like are broken through.
Description
Technical Field
The invention relates to the technical field of petrochemical rock core displacement experiments, in particular to a variable-diameter rock core holder which is suitable for the aspects of rock core holder design, oil gas experiment technology, exploration and development technology and the like.
Background
With the increasing demand for energy and the increasing pressure of emission reduction in China, the development of underground energy development and storage, carbon dioxide geological storage, unconventional gas reservoir development and other special underground space geological engineering related to underground fluid is rapid, and the research on the dynamic behavior of the related rock-soil body chemistry-seepage-mechanics multi-field coupling process becomes one of the important subjects of application basic research. Because the subsurface fluid is injected and produced through the wellbore, the flow process of the subsurface fluid during injection is a process of increasing swept area, and likewise, the production of the subsurface fluid is a process of decreasing swept area. Accurate characterization of the flow laws during injection and production of subterranean fluids from a formation has become a hot and difficult problem in current global research. The current indoor physical experiment research mostly utilizes equal-diameter rock cores to carry out experiments, and does not accord with the real flow mode of formation fluid injection and exploitation through a shaft. Therefore, a variable-diameter core holder device is needed, which can truly invert the flow mode of formation fluid in the injection and production process, and lays a foundation for researching the actual underground fluid injection and production mechanism.
Disclosure of Invention
In view of the above problems, the present invention aims to overcome the above disadvantages of the prior art, and provides a variable diameter core holder which has a simple structure and is convenient to use, can completely seal a core, and can allow cores of two diameters to be combined for use. And measuring the combined permeability of the fluid passing through the combined rock core, breaking through pressure and other key physical parameters.
In order to achieve the above purpose, the invention adopts the following technical measures:
a variable-diameter core holder is composed of a first 25mm plug, a first 25mm cushion block, a first 25mm core barrel, a second 50mm cushion block, a second 50mm plug, a fluid channel, a 25mm taper sleeve, a 25mm annular sealing ring, a confining pressure inlet (outlet), a first 25mm rubber sleeve, a 25mm annular pressure cavity, a first 25mm core, a transition taper sleeve, a 25mm annular sealing ring, a 50mm annular sealing ring, a confining pressure inlet (outlet), a 50mm rubber sleeve, a 50mm annular pressure cavity, a second 50mm core, a 50mm taper sleeve, a 50mm sealing ring, a fluid channel and a Mi-shaped annular diversion trench, and is characterized in that the first 25mm plug, the first 25mm cushion block, the first 25mm core barrel, the second 50mm cushion block and the 50mm plug are sequentially connected, and the axial positions of the first 25mm plug and the left first 25mm core barrel are provided with the 25mm plug connected with the first 25mm plug The fluid passage, second 25mm rock core barrel left end is equipped with 25mm tapering cover, the 25mm rubber sleeve that 25mm tapering cover corresponds, the urceolus be equipped with 25mm ring compression chamber communicating confined pressure entry, first 50mm rock core barrel left end is equipped with transition tapering cover, the second 50mm rubber sleeve that transition tapering cover corresponds, the urceolus be equipped with 50mm ring compression chamber communicating confined pressure entry, the right-hand member is equipped with corresponding 50mm tapering cover, the axis position of second 50mm cushion, second 50mm end cap be equipped with the first 50mm rock core barrel continuous fluid passage, transition tapering cover respectively with first rock core barrel, second rubber sleeve, second rock core barrel 4, rubber sleeve be zonulae occludens in proper order.
The variable-diameter core holder can accommodate cores with two diameters for experiments, the diameters of the large and small cores can be designed according to real conditions, different pressures can be applied to the large and small cores, key physical parameters such as combined permeability and sweep efficiency under different formation pressures can be measured, and real underground fluid flow modes of well bore injection and exploitation can be researched.
Furthermore, the first 25mm plug is in threaded fastening connection with the 25mm taper sleeve.
Furthermore, the taper sleeve of 25mm is in threaded fastening connection with the first core barrel of 25 mm.
Furthermore, the first 25mm rock core barrel and the transition taper sleeve are provided with an annular sealing ring.
Furthermore, the transition taper sleeve is in threaded fastening connection with the second 50mm core barrel.
Furthermore, the first 50mm rock core barrel and the transition taper sleeve are provided with an annular sealing ring.
Furthermore, the second 50mm core barrel and the 50mm taper sleeve are provided with an annular sealing ring.
Furthermore, the right end plug is in threaded fastening connection with the right taper sleeve.
Furthermore, the annular diversion trench shaped like a Chinese character 'mi' is carved at one end of the first 25mm cushion block and the second 50mm cushion block which are contacted with the rock core.
Wherein, the tapering cover of 25mm, transition tapering cover, 50mm tapering cover are the key part, combine together again through foretell mode with the three, can connect two kinds of rock cores of different diameters in parallel and carry out the displacement experiment, have solved present rock core holder and can only adapt single size rock core and the technical difficulty and the technical problem of single stress state, can exert different confined pressures simultaneously, can accord with actual water injection or production operating mode more.
Compared with the prior art, the invention has the following advantages and effects:
1. the variable-diameter core holder can accommodate cores with two diameter sizes for experiments, the diameters of the cores with different sizes can be designed according to the real situation of the stratum, and the experiment is realized by changing the diameters of the large cylinder and the 25mm cylinder;
2. the 25mm core barrel, the transition taper sleeve and the 50mm core barrel are key components of the invention, and the components are connected to solve the technical difficulty and technical problem that the conventional core holder can only be adapted to a single-size core and is in a single stress state.
3. The variable-diameter core holder can apply different confining pressures to cores with the sizes of 25mm, measure key physical parameters such as combined permeability and sweep efficiency under different formation pressures, and research real underground fluid flow modes of well bore injection and exploitation;
4. the variable-diameter core holder can change the length of a rock sample, and different diameter-height ratios can be set by changing the height of the cushion block and the footage of the plug;
5. the variable-diameter core holder can study the influence of the change of the seepage path of fluid near a well bore on the recovery ratio of underground fluid.
Drawings
FIG. 1 is a schematic cross-sectional view of a variable diameter core holder;
FIG. 2 is a schematic view of a 25mm plug for a variable diameter core holder;
FIG. 3 is a schematic diagram of a 25mm pad for a variable diameter core holder;
fig. 4 is a schematic diagram of a transition taper sleeve for a variable diameter core holder.
Wherein:
1-first 25mm plug, 2-first 25mm cushion block, 3-first 25mm core barrel, 4-second 50mm core barrel, 5-second 50mm cushion block, 6-second 50mm plug, 7-fluid channel, 8-25mm taper sleeve, 9-25mm annular sealing ring, 10-confining pressure inlet (outlet), 11-first 25mm rubber sleeve, 12-25mm annular pressure cavity, 13-first 25mm core, 14-transition taper sleeve, 15-first 25mm annular sealing ring, 16-second 50mm annular sealing ring, 17-confining pressure inlet (outlet), 18-second 50mm rubber sleeve, 19-50mm annular pressure cavity, 20-second 50mm core, 21-50mm taper sleeve, 22-50mm sealing ring, 23-fluid channel, 24-meter-shaped annular diversion trenches.
Detailed Description
The technical solution of the present invention will be described with reference to the accompanying drawings,
it should be noted that the described embodiments are only some embodiments of the invention, and not all embodiments.
It is to be noted that, unless otherwise specified, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the description of the present invention, it should be noted that the terms "middle axis", "upper", "lower", "left", "right", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1:
as shown in figures 1-4, a variable diameter core holder is composed of a first 25mm plug 1, a first 25mm cushion block 2, a first 25mm core barrel 3, a second 50mm core barrel 4, a second 50mm cushion block 5, a second 50mm plug 6, a fluid channel 7, a 25mm taper sleeve 8, a 25mm annular seal ring 9, a confining pressure inlet 10 (outlet), a first 25mm rubber sleeve 11, a 25mm annular pressure cavity 12, a first 25mm core 13, a transition taper sleeve 14, a first 25mm annular seal ring 15, a second 50mm annular seal ring 16, a confining pressure inlet 17 (outlet), a 50mm rubber sleeve 18, a 50mm annular pressure cavity 19, a second 50mm core 20, a 50mm taper sleeve 21, a 50mm seal ring 22, a fluid channel 23 and a Mi-shaped annular guide groove 24, and is characterized in that the variable diameter core holder is sequentially combined with the first 25mm plug 1, the first 25mm cushion block 2, the second 25mm cushion block 5, the second 50mm cushion block 6, the second 50mm taper sleeve 14, the first 25mm taper sleeve 15, the second annular seal ring 15, the second 25mm taper sleeve 15, the second annular seal ring 24 and the second annular seal ring 24, The core body comprises a first 25mm core barrel body 3, a second 50mm core barrel body 4, a second 50mm cushion block 5 and a second 50mm plug 6 which are connected, a fluid channel 7 connected with the first 25mm core barrel body 3 is arranged at the axial position of the first 25mm plug 1 and the first 25mm cushion block 2, the first 25mm plug 1 is in threaded fastening connection with a 25mm taper sleeve 8, the first 25mm core barrel body 3 is in threaded fastening connection with the 25mm taper sleeve 8 and is sealed by a 25mm sealing ring 9, two confining pressure inlets (outlets) 10 are arranged above the first 25mm core barrel body 3, the first 25mm core barrel body 3 and an internal first 25mm rubber sleeve 11 form a 25mm annular pressure cavity 12, the first 25mm core 13 is placed in the 25mm annular pressure cavity 12, a guide groove 24 shaped like a Chinese character 'mi' is carved at one end of the first 25mm core barrel body 2 and the first 25mm core 13 in contact, the core barrel is characterized in that a transition taper sleeve 14 is arranged in the first 25mm core barrel 3 and the second 50mm core barrel 4, the first 25mm core barrel 3 is in threaded fastening connection with the transition taper sleeve 14, an annular 25mm sealing ring 15 is arranged on the first 25mm core barrel 3, the second 50mm core barrel 4 is in threaded fastening connection with the transition taper sleeve 14, an annular 50mm sealing ring 16 is arranged on the second 50mm core barrel 4, a confining pressure inlet (outlet) 17 is arranged above the second 50mm core barrel 4, the second 50mm core barrel 4 and an inner 50mm rubber sleeve 18 form a 50mm annular pressure cavity 19, a first 50mm core 20 is placed in the 50mm annular pressure cavity 19, a meter-shaped diversion trench 24 is carved at one end of the second 50mm core cushion block 5, which is in contact with the second 50mm core 20, and the second 50mm core barrel 4 is in threaded fastening connection with the 50mm taper sleeve 21, simultaneously, a sealing ring 22 is arranged between a second 50mm core barrel 4 and a 50mm taper sleeve 21 for sealing, a second 50mm plug 5 is in threaded fastening connection with the 50mm taper sleeve 21, a fluid channel 23 connected with the second 50mm core barrel 4 is arranged at the axis positions of the first 50mm plug 5 and the second 50mm cushion block 6, and a transition taper sleeve 16 is respectively in tight connection with the first 5mm core barrel 3, the first 25mm rubber sleeve 11, the second 50mm core barrel 4 and the second 50mm rubber sleeve 18 in sequence.
The first 25mm core barrel 3 and the second 50mm core barrel 4 can be respectively placed in two rock samples with different diameters.
The 25mm barrel annular pressure cavity 12 and the 50mm core barrel annular pressure cavity 19 can apply different confining pressures (pressure ranges of 0 or 2 or 4 or 7 or 10 or 14 or 19 or 21 or 25 or 28 or 32 or 36 or 40 or 43 or 47 or 51 or 57 or 60MPa) to the first 25mm core 13 and the second 50mm core 20.
The first plug 1 of the precession type 25mm compresses tightly first cushion block 2 of 25mm and first 25mm rock core 13, the rice style of calligraphy annular guiding gutter 24 of the side of first cushion block 2 of 25mm can make the fluid evenly inject into.
Through the connection mode, the first 25mm core 13 and the second 50mm core 20 can be connected together, when fluid is injected from one end, the second 50mm core 20 and the first 25mm core 13 can be in different stress states, key physical parameters such as the combined permeability and sweep efficiency of the stratum can be measured, and the real underground fluid flow mode of well bore injection and exploitation can be researched.
The core holder is characterized in that the core holder is designed according to the size of a core holder with variable diameter, and can be adapted to two cores with different sizes, wherein the core holder is more than 25mm and is called a first 25mm core 13, the fittings matched with the 25mm core 13 are called 25mm fittings, the fittings matched with the 25mm core 13 are called second 50mm cores 20, the fittings matched with the 50mm cores 20 are called 50mm cores 20, the fittings matched with the second 50mm cores 20 are called 50mm rock fittings, and the unrepresented sizes are called large rock bores and large rock bores of different large 25mm models and rock bores of different rock bores and are called large rock bores, and the large rock bores of different rock bores and large rock bores of different rock bores can be designed according to different sizes Designing the mandrel body. In this embodiment, the first 25mm core 13 is placed in the first 25mm core barrel 3, and simultaneously the first 25mm pad 2 is also placed, the 25mm pad 2 is screwed in and blocked by the 25mm pad 1, the second 50mm core 20 is placed in the second 50mm core barrel 4, and simultaneously the first 50mm pad 5 is also placed, the first 50mm plug 6 is screwed in and blocked by the second 50mm pad 5, confining pressure is applied to the first 25mm core 13 by injecting confining pressure liquid into the 25mm confining pressure chamber 12 through the confining pressure inlet 10, confining pressure is applied to the 50mm core 20 by injecting confining pressure liquid into the 50mm confining pressure chamber 19 through the confining pressure inlet 17, confining pressure is applied to the 50mm core 20, fluid is injected into the first 25mm core 13 through the fluid channel 7, and fluid flows through the first 25mm core 13 and the second 50mm core 20 and flows out of the fluid channel 23, parameters such as absolute permeability and relative permeability of the combined core during subsurface fluid injection may be determined. Fluid is injected into the second 50mm core 20 through the fluid channel 23, and the fluid flows through the second 50mm core 20 and the first 50mm core 13 and flows out of the fluid channel 7.
In a specific embodiment, the contact end surface of the first 25mm pad 2 and the first 25mm core 13, and the contact end surfaces of the second 50mm pad 5 and the second 50mm core 20 are both provided with a cross-shaped annular diversion trench 24, so that uniform injection of fluid from the end surface of the rock sample can be ensured.
In a specific embodiment, the first 25mm core 13 and the second 50mm core 20 may use rock samples with different lengths to realize different aspect ratios and simulate more real stratum extraction conditions.
In a specific embodiment, the 25mm annular pressure chamber 12 and the 50mm annular pressure chamber 19 may apply different confining pressures, so that the first 25mm core 13 and the second 50mm core 20 are in different stress environments to simulate a more real formation condition.
Claims (6)
1. The utility model provides a become diameter rock core holder, it includes first end cap (1), first cushion (2), first rock core barrel (3), second rock core barrel (4), second cushion (5), second end cap (6), its characterized in that: a variable-diameter core holder is sequentially connected with a first plug (1), a first cushion block (2), a first core barrel (3), a second core barrel (4), a second cushion block (5) and a second plug block (6), the axes of the first plug (1) and the first cushion block (2) are provided with a fluid channel (7) connected with the first core barrel (3), the first plug (1) is connected with a taper sleeve (8), the first core barrel (3) is connected with the taper sleeve (8) and is sealed by a sealing ring (9), two confining pressure inlets (10) are arranged above the first core barrel (3), the first core barrel (3) and an internal first rubber sleeve (11) form an annular pressure cavity (12), a first core (13) is placed in the first rubber sleeve (11), one end of the first cushion block (2) in contact with the first core (13) is carved with a guide groove (24) shaped like a Chinese character 'mi', a transition taper sleeve (14) is arranged in the first core barrel (3) and the second core barrel (4), the first core barrel (3) is connected with the transition taper sleeve (14), an annular sealing ring (15) is arranged on the first core barrel (3), the second core barrel (4) is connected with the transition taper sleeve (14), an annular sealing ring (16) is arranged on the second core barrel (4), a confining pressure inlet (17) is arranged above the second core barrel (4), the second core barrel (4) and an internal second rubber sleeve (18) form an annular pressure cavity (19), a second core (20) is placed in the second rubber sleeve (18), and the transition taper sleeve (14) is respectively connected with the first core barrel (3), the first rubber sleeve (11), the second core barrel (4) and the second rubber sleeve (18) in sequence;
the diameters of the first plug (1) and the first cushion block (2) are 25mm, and the inner diameters of the taper sleeve (8) and the first rubber sleeve (11) are 25 mm;
the diameters of the second cushion block (5) and the second plug (6) are 50mm, and the inner diameter of the second rubber sleeve (18) is 50 mm.
2. A variable diameter core holder as claimed in claim 1, wherein: one end of the second cushion block (5) in contact with the second core (20) is carved with a guide groove (24) shaped like a Chinese character 'mi', the second core cylinder (4) is connected with the taper sleeve (21), and the second core cylinder (4) and the taper sleeve (21) are sealed by a sealing ring (22).
3. A variable diameter core holder as claimed in claim 1, wherein: and the second plug (6) is connected with the taper sleeve (21), and a fluid channel (23) connected with the second core barrel (4) is arranged at the axial positions of the second plug (6) and the second cushion block (5).
4. A variable diameter core holder as claimed in claim 1, wherein: the first core barrel (3) and the second core barrel (4) are used for placing two rock samples with different diameters respectively.
5. A variable diameter core holder as claimed in claim 1, wherein: the first core (13) and the second core (20) clamped by the annular pressure cavity (12) and the annular pressure cavity (19) exert different confining pressures.
6. A variable diameter core holder as claimed in claim 1, wherein: the first plug (1) compresses the first cushion block (2) and the first rock core (13), and fluid is uniformly injected into the annular guide groove (24) which is shaped like a Chinese character 'mi' and is arranged on the side surface of the first cushion block (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011582084.6A CN112763391B (en) | 2020-12-28 | 2020-12-28 | Variable-diameter core holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011582084.6A CN112763391B (en) | 2020-12-28 | 2020-12-28 | Variable-diameter core holder |
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| CN112763391A CN112763391A (en) | 2021-05-07 |
| CN112763391B true CN112763391B (en) | 2021-12-31 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2551990Y (en) * | 2002-02-27 | 2003-05-21 | 大庆油田有限责任公司 | Internal diameter change transition block for core holder |
| RU2342646C2 (en) * | 2007-02-21 | 2008-12-27 | Федеральное государственное унитарное предприятие Сибирский научно-исследовательский институт геологии, геофизики и минерального сырья | Device for determination of porosity and permeability of rock samples |
| CN202119697U (en) * | 2011-05-13 | 2012-01-18 | 中国石油化工股份有限公司 | Transition sleeve for core analysis and testing |
| CN105259092B (en) * | 2015-11-10 | 2018-01-05 | 东北石油大学 | High temperature triaxial pressure rock pore oozes measurement apparatus |
| CN106769165B (en) * | 2016-09-29 | 2020-05-08 | 中国石油天然气股份有限公司 | Core clamping system |
| CN109060846A (en) * | 2018-08-14 | 2018-12-21 | 贵州大学 | A kind of CT rock core scanning driving device |
| CN109856033B (en) * | 2019-02-25 | 2020-05-19 | 中国地质大学（北京） | Adjustable rock core holder |
| CN210108909U (en) * | 2019-06-10 | 2020-02-21 | 西南石油大学 | Take water-cooled rock core holder |
| CN211856569U (en) * | 2019-11-06 | 2020-11-03 | 长江大学 | Variable diameter and controlled zone pressurization core holder apparatus |
| CN110823779B (en) * | 2019-11-19 | 2022-09-16 | 西南石油大学 | Rock core holder and combination formula rock core centre gripping model |
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