CN202267662U - Rock core holder - Google Patents
Rock core holder Download PDFInfo
- Publication number
- CN202267662U CN202267662U CN2011202319598U CN201120231959U CN202267662U CN 202267662 U CN202267662 U CN 202267662U CN 2011202319598 U CN2011202319598 U CN 2011202319598U CN 201120231959 U CN201120231959 U CN 201120231959U CN 202267662 U CN202267662 U CN 202267662U
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- cylindrical shell
- plug
- confined pressure
- holding unit
- core holding
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Abstract
The utility model discloses a rock core holder, and the rock core holder comprises a cylindrical shell, a sample pipe, a fixed bulkhead, an adjustable bulkhead, an insulation casing pipe, a top seal cover, wherein, the cylindrical shell is prepared by engineering plastics, and a confining pressure chamber is in the cylindrical shell for disposing a sample pipe, and the cylindrical shell is covered by the insulation casing pipe; the lower step portion of the cylindrical shell bottom is threaded which is matched with the screw thread of the fixed bulkhead for sealing the cylindrical shell bottom; the upper step portion at top of the cylindrical shell is threaded and is matched with the top seal cover and the adjustable bulkhead for sealing the cylindrical shell top; wherein, a channel for displacement fluid circulation and a channel for confining pressure fluid circulation in the fixed bulkhead and the adjustable bulkhead; the rock core holder is used for avoiding severe interference of the rock core holder temperature change to a nuclear magnetic resonance probe coil in the high pressure state.
Description
Technical field
The utility model relates to petroleum-based energy engineering field, particularly a kind of core holding unit.
Background technology
In petroleum-based energy engineering field, because the harmless characteristic of magnetic resonance detection, just can pass through the relaxation time spectrum data not destroying the structure of matter, analyze the component of material; Through MRI system, possible material can't harm, the non-intruding imaging analysis; Also but the using NMR system carries out conventional parameter (for example permeability, factor of porosity, the saturation degree etc.) experiment of reservoir core.Because nuclear magnetic resonance has characteristics such as harmless, quick, accurate and good reproducibility, and can realize the function that other conventional sense analytical approach can't realize, becomes a kind of by the detection technique of international endorsement.
Along with the nuclear magnetic resonance application and development, in conjunction with the engineering experiment demand, the online displacement seepage flow under can the simulated formation pressure environment detects the concern that demand more and more receives industry.Therefore; Rock core that can supporting NMR system added hold device and proposed very harsh requirement; Particularly NMR system itself is to the sensitivity of ferrimagnet, and the basal signal of conventional material in NMR system can produce problems such as interference to measured core sample.And in the procedures of using nuclear magnetic resonance, the temperature variation of the core clamping device of use can cause interference to the probe coil of nuclear magnetic resonance, and influence is based on the imaging operation of the low-field nuclear magnetic resonance imaging analysis system of permanent magnet.
In sum, core holding unit of the prior art can not be avoided the interference that the temperature variation of core holding unit under the high pressure conditions produces the nmr probe coil.
The utility model content
The utility model provides a kind of core holding unit, the interference that this core holding unit can avoid the temperature variation of core holding unit under the high pressure conditions that the nmr probe coil is produced.
For achieving the above object, the utility model is achieved in that
The utility model discloses a kind of core holding unit, said core holding unit comprises: cylindrical shell, sample hose, fixedly plug, adjustable plug, thermal insulation casing, end sealing lid, wherein,
The confined pressure chamber that is formed by last rank portion and following rank portion is arranged in the cylindrical shell, placement sample hose in the confined pressure chamber, cylindrical shell is with thermal insulation casing outward; Wherein, there is screw thread in the following rank portion of cylindrical shell bottom, and with the fixing threads engaged of plug, with the cylindrical shell bottom end seal, there is screw thread in the last rank portion of cylinder top, cooperatively interacts with end sealing lid and adjustable plug, with the cylindrical shell top seal;
Sample hose places in the confined pressure chamber of cylindrical shell, is used to place laboratory sample, and outer wall has helicla flute, after fitting with cylinder inboard wall, in the confined pressure chamber, is useful on the helical duct that the confined pressure fluid passes through;
Fixing plug, the screw thread of the last rank portion through screw thread and cylinder top closely is connected, with the cylindrical shell bottom seals; Inside is useful on the displacement fluid passage of displacement fluid flow and is used for the confined pressure fluid passage that the confined pressure fluid passes through; Wherein, an end of displacement fluid passage is that displacement pressure is imported and exported, and the other end is in sample hose; One end of confined pressure fluid passage is that confined pressure is imported and exported, and the other end is in the confined pressure chamber;
End sealing lid center annular space closely is connected with cylindrical shell through outside screw, is stuck in the prominence of rank portion, and the inside thread through the center ring vacancy closely is connected with adjustable plug, and cylinder top is sealed;
Adjustable plug passes end sealing lid center annular space, combines closely through the inside thread of screw thread and end sealing lid, makes the cylindrical shell top seal; Inside is useful on the displacement fluid passage of displacement fluid flow and is used for the confined pressure fluid passage that the confined pressure fluid passes through; Wherein, an end of displacement fluid passage is that displacement pressure is imported and exported, and the other end is in sample hose; One end of confined pressure fluid passage is that confined pressure is imported and exported, and the other end is in the confined pressure chamber;
Thermal insulation casing is made up of the vacuum dewar pipe box, is enclosed within the cylindrical shell outside, combines closely with cylindrical shell.
In sum; The core holding unit that the utility model provides has avoided the temperature variation of core holding unit under the high pressure conditions in the past that the nmr probe coil is produced the serious bottleneck that disturbs; The ingenious heat insulation structure that utilizes; Heat conduction own effectively intercepts to core holding unit, thereby prevents the interference of temperature variation to probe coil even the generation of whole magnet, is applicable to the low-field nuclear magnetic resonance imaging analysis system based on permanent magnet more.
Description of drawings
Fig. 1 is the structural representation of a kind of core holding unit in the specific embodiment in the utility model;
Fig. 2 is the synoptic diagram of a kind of specific embodiment in the utility model.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer, the utility model is described in detail below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 is the structural representation of a kind of core holding unit in the specific embodiment in the utility model; As shown in Figure 1, said core holding unit comprises: cylindrical shell 9, sample hose 7, fixedly plug 14, adjustable plug 3, thermal insulation casing 8, end sealing lid 4, wherein,
In a kind of embodiment of the utility model, said cylindrical shell 9 is processed by engineering plastics, and the confined pressure chamber 10 that is formed by last rank portion 15 and following rank portion 16 is arranged in the cylindrical shell 9, confined pressure chamber 10 interior placement sample hoses 7, and cylindrical shell 9 outsides are with thermal insulation casing 8; Wherein, there is screw thread in the following rank portion 16 of cylindrical shell 9 bottoms, with the fixing threads engaged of plug 14, and uses o RunddichtringO 503 with the cylindrical shell bottom end seal, keeps sealing state in the bottom of experiment middle cylinder body 9 always.The withstand voltage of said cylindrical shell 9 can reach 22Mpa.Wherein, in the specific embodiment of the utility model, the binding site of said each parts of core holding unit uses the o RunddichtringO to seal.
Fixedly plug 14 is processed by engineering plastics, and the screw thread of the following rank portion 16 through screw thread and cylindrical shell 9 bottoms closely is connected, with the bottom seals of cylindrical shell 9; Fixedly plug 14 inside are useful on the displacement fluid passage of displacement fluid flow and are used for the confined pressure fluid passage that the confined pressure fluid passes through; Wherein, an end of displacement fluid passage is that displacement pressure imports and exports 102, and the other end is in sample hose; One end of confined pressure fluid passage is that confined pressure imports and exports 202, and the other end is in the confined pressure chamber; Wherein, in a kind of embodiment of the utility model, said displacement pressure is imported and exported 102 and is positioned at the fixedly centermost of plug 14 end faces, and said confined pressure is imported and exported the fixedly side of plug 14 of 202 confined pressures, and does not disturb mutually said displacement fluid passage, confined pressure fluid passage.
End sealing covers 4 center annular spaces, closely is connected with cylindrical shell 9 through outside screw, is stuck in the prominence of rank portion 15, and uses o RunddichtringO 501 to seal.Adjustable plug 3; Pass the center annular space of end sealing lid 4; Under the situation that end sealing lid 4 is fixed; Adjustable plug 3 can cover 4 center ring vacancy at end sealing and slide, and adjusts the degree of depth that adjustable plug gets into sample hose 7, in the setting range of adjustable plug described in a kind of embodiment of the utility model at 2cm～6cm.If when laboratory sample 13 volume ratios are less; The setting range that has exceeded adjustable plug 3; Then on the end face of fixedly plug and adjustable plug, place the plug pad 11 of respective thickness; There is the central passage that overlaps with the displacement fluid passage at said plug pad 11 centers, on two end faces of plug pad 11 the annular cutting that communicates with said central passage are arranged all.Guaranteeing under the prerequisite of sealing effectiveness, guaranteeing that the end face of fixing plug 14 or adjustable plug 3 contacts with the close of core sample, thereby locate sample, helping applying of confined pressure.In a kind of embodiment of the utility model, said plug pad 11 is placed between adjustable plug 3 and the sample and fixedly between plug 14 and the sample.
Screw thread is arranged at said adjustable plug 3 tops, and said adjustable plug 3 is combined closely through the inside thread of screw thread and end sealing lid 4, makes the cylindrical shell top seal; Inside is useful on the displacement fluid passage of displacement fluid flow and is used for the confined pressure fluid passage that the confined pressure fluid passes through; One end of displacement fluid passage is that displacement pressure imports and exports 101, and the other end is in sample hose; One end of confined pressure fluid passage is that confined pressure imports and exports 201, and the other end is in confined pressure chamber 10; Wherein, in a kind of embodiment of the utility model, said displacement pressure import and export 101 are positioned at the centermost of adjustable plug 3 end faces, and said confined pressure import and export 201 are positioned at the side of adjustable plug 3, and does not disturb mutually said displacement fluid passage, confined pressure fluid passage.
Said adjustable plug 3, fixedly the displacement pressure on the plug 14 is imported and exported to link to each other with the displacement pressure system and is used for the regulating and controlling of displacement pressure; Confined pressure is imported and exported with the confined pressure control system and is linked to each other as the fluid inlet and outlet of the heating of control sample, cooling; Promptly this fluid plays confined pressure size adjustment and temperature controlled effect through the dual control of temperature and pressure.
Said adjustable plug 3, fixedly plug 14 is near the annular cutting that is connected with the displacement fluid passage is all arranged on the end face of sample hose one side; Under the cooperation of confined pressure; The displacement fluid can think and exert pressure simultaneously from the axial end of sample, thus real simulated underground environment more.
For the sample of non-intact form, for example sand, cinder, landwaste or natural sediment are imported and exported for avoiding chip to stop up displacement, screen pack 12 on the pad of sample two ends, and said screen pack 12 has engineering plastics to process.
In a kind of embodiment of the utility model, the cylindrical shell of said core holding unit, fixedly plug, end sealing lid, adjustable plug, plug pad, screen pack use engineering plastics to process; Said sample hose is processed by perfluor plastics or FFKM.
Said engineering plastics are mixed and made into by polyimide and carbon fibre according to a certain percentage, are mixed by the carbon fibre of 70% polyimide and 30% at engineering plastics described in the preferred embodiment of the utility model and process.
Fig. 2 is the synoptic diagram of a kind of specific embodiment in the utility model; Of Fig. 2, wherein core holding unit 301 is placed in the probe coil 302.
At first; Measure the axial dimension of testing sample 13; According to the length of itself and sample hose 7, place a suitable plug cushion block 11 respectively in the front and back end of sample 13, fixedly plug 14 also inserts in the sample hose 7; The rear end of this connector from cylindrical shell 9 is assemblied in the described core holding unit, makes the cylindrical shell bottom seals; Subsequently end sealing lid 4 is assemblied in the top of clamper, screws, be stuck in the prominence of rank portion on the barrel through screw thread; Then slowly screw in adjustable plug 3, till the end face of adjustable plug 3 touches the end face of plug cushion block 11; Need thermal insulation casing 8 be enclosed within cylindrical shell 9 outsides gently, be assembled into core holding unit 301 after the completion.
The core holding unit that assembles 301 is put into probe coil 302, and the confined pressure import and export 202 of plug 14 and the confined pressure import and export 201 of adjustable plug 3 link to each other respectively with fixedly with fluid temperature control system 306, automatic confined pressure control system 307 again; Displacement pressure control system 305 is with fixedly the displacement pressure import and export 102 of plug 14 and the displacement pressure import and export 101 of adjustable plug 3 link to each other.
Like this, confined pressure in the core holding unit and temperature are just controlled by fluid temperature control system 306, automatic confined pressure control system 307; Displacement hydrodynamic pressure in the sample hose 7 is by 305 controls of displacement pressure control system.
Wherein, nuclear magnetic resonance module 308 links to each other with probe coil 302, gradient 303, magnet 304 respectively.
In sum; A kind of core holding unit that provides in the utility model; Through using engineering plastics to do main body, rely on its no nuclear magnetic signal, be easy to processing, high temperature resistant, advantage such as corrosion resistivity is good, eliminating clamper itself to the interference in magnetic field with and basal signal to the influence of measurement result; In the confined pressure chamber, form helical duct, be carved with annular cutting, make said core holding unit real simulated underground environment more at the plug end face; In order to prevent that the chip in the sample from stopping up the passage in the plug, places screen pack between sample and the plug; In order to prevent the interference of temperature, between cylindrical shell and malcoils, increase the Dewar pipe box of vacuum.
A kind of core holding unit that provides in the utility model; Can be used for rock core, coal sample and the crude sedimentation layer sample high pressure displacement Magnetic resonance imaging test experience under high temperature or low-temperature condition; And the temperature variation of having avoided core holding unit under the high-temperature high-pressure state in the past fully helps the physical parameter of measuring samples under the simulation stratum condition more to the serious interference that the nmr probe coil produces
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the scope of the utility model protection.
Claims (8)
1. a core holding unit is characterized in that, this core holding unit comprises: cylindrical shell, sample hose, fixedly plug, adjustable plug, thermal insulation casing, end sealing lid, wherein,
The confined pressure chamber that is formed by last rank portion and following rank portion is arranged in the cylindrical shell, and the placement sample hose is with thermal insulation casing in the confined pressure chamber outside the cylindrical shell; Wherein, there is screw thread in the following rank portion of cylindrical shell bottom, and with the fixing threads engaged of plug, with the cylindrical shell bottom end seal, there is screw thread in the last rank portion of cylinder top, cooperatively interacts with end sealing lid and adjustable plug, with the cylindrical shell top seal;
Sample hose places in the confined pressure chamber of cylindrical shell, is used to place laboratory sample, and outer wall has helicla flute, after fitting with cylinder inboard wall, in the confined pressure chamber, is useful on the helical duct that the confined pressure fluid passes through;
Fixing plug, the screw thread of the last rank portion through screw thread and cylinder top closely is connected, with the cylindrical shell bottom seals; Inside is useful on the displacement fluid passage of displacement fluid flow and is used for the confined pressure fluid passage that the confined pressure fluid passes through; Wherein, an end of displacement fluid passage is that displacement pressure is imported and exported, and the other end is in sample hose; One end of confined pressure fluid passage is that confined pressure is imported and exported, and the other end is in the confined pressure chamber;
End sealing lid center annular space closely is connected with cylindrical shell through outside screw, is stuck in the prominence of rank portion, and the inside thread through the center ring vacancy closely is connected with adjustable plug, and cylinder top is sealed;
Adjustable plug passes end sealing lid center annular space, combines closely through the inside thread of screw thread and end sealing lid, makes the cylindrical shell top seal; Inside is useful on the displacement fluid passage of displacement fluid flow and is used for the confined pressure fluid passage that the confined pressure fluid passes through; Wherein, an end of displacement fluid passage is that displacement pressure is imported and exported, and the other end is in sample hose; One end of confined pressure fluid passage is that confined pressure is imported and exported, and the other end is in the confined pressure chamber;
Thermal insulation casing is made up of the vacuum dewar pipe box, is enclosed within the cylindrical shell outside, combines closely with cylindrical shell.
2. core holding unit according to claim 1 is characterized in that, on the end face of said fixedly plug near sample hose one side the annular cutting that is communicated with the displacement fluid passage is arranged.
3. core holding unit according to claim 1 is characterized in that, on the end face of said adjustable plug near sample hose one side the annular cutting that is communicated with the displacement fluid passage is arranged.
4. core holding unit according to claim 1 is characterized in that, said core holding unit further comprises: organize the plug pad more; Wherein,
Said plug pad is used to be placed between adjustable plug and the sample and fixedly between plug and the sample, and the center has and adjustable plug, the fixing central passage that coincides of the displacement fluid passage of plug; On two end faces of plug pad the annular cutting that is communicated with said central passage is arranged all.
5. core holding unit according to claim 1 is characterized in that, said core holding unit further comprises:
Screen pack is placed on the side of plug pad near sample, is used to prevent that the sample chip from stopping up the displacement fluid passage.
6. core holding unit according to claim 1 is characterized in that, screw thread is arranged at said adjustable plug top, behind the center annular space through screw top precession end sealing lid; Said adjustable plug can slide in the center annular space of end sealing lid, adjusts the degree of depth that adjustable plug gets into sample hose.
7. according to each described core holding unit of claim 2～6, it is characterized in that the binding site of said each parts of core holding unit uses the o RunddichtringO to seal.
8. core holding unit according to claim 7 is characterized in that, the cylindrical shell of said core holding unit, fixedly plug, end sealing lid, adjustable plug, plug pad, screen pack use engineering plastics to process; Said sample hose is processed by perfluor plastics or FFKM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202319598U CN202267662U (en) | 2011-07-01 | 2011-07-01 | Rock core holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202319598U CN202267662U (en) | 2011-07-01 | 2011-07-01 | Rock core holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202267662U true CN202267662U (en) | 2012-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202319598U Expired - Lifetime CN202267662U (en) | 2011-07-01 | 2011-07-01 | Rock core holder |
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| CN (1) | CN202267662U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| CN103954639A (en) * | 2014-04-09 | 2014-07-30 | 上海大学 | Method for detecting distribution of gel in micropores |
| CN104390883A (en) * | 2014-11-10 | 2015-03-04 | 西南石油大学 | Novel adsorption and desorption experiment device and novel adsorption and desorption experiment method |
| CN105277582A (en) * | 2015-10-22 | 2016-01-27 | 成都岩心科技有限公司 | Special core holder for nuclear magnetic resonance |
| CN105651802A (en) * | 2014-09-15 | 2016-06-08 | 艾斯拜克特Ai有限公司 | Temperature-controllable and replacable NMR probe case and method |
| CN106525525A (en) * | 2016-10-21 | 2017-03-22 | 中联煤层气国家工程研究中心有限责任公司 | Method for preparing artificial coal core standard sample |
| CN107044935A (en) * | 2017-04-26 | 2017-08-15 | 中国石油大学(华东) | The core holding unit and its method of work of a kind of rock fever fracturing experiment |
| CN107435538A (en) * | 2016-05-27 | 2017-12-05 | 中国石油化工股份有限公司 | A kind of rock core sealing device and encapsulating method |
| US10371654B2 (en) | 2006-08-21 | 2019-08-06 | Aspect Ai Ltd. | System and method for a nondestructive on-line testing of samples |
| CN114112836A (en) * | 2021-11-04 | 2022-03-01 | 中山大学 | Clamp holder suitable for verifying water plugging performance of waterproof material |
-
2011
- 2011-07-01 CN CN2011202319598U patent/CN202267662U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10371654B2 (en) | 2006-08-21 | 2019-08-06 | Aspect Ai Ltd. | System and method for a nondestructive on-line testing of samples |
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| CN102288629B (en) * | 2011-07-01 | 2014-04-16 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| CN103954639A (en) * | 2014-04-09 | 2014-07-30 | 上海大学 | Method for detecting distribution of gel in micropores |
| CN105651802A (en) * | 2014-09-15 | 2016-06-08 | 艾斯拜克特Ai有限公司 | Temperature-controllable and replacable NMR probe case and method |
| US10031196B2 (en) | 2014-09-15 | 2018-07-24 | Aspect Ai Ltd. | Temperature-controlled exchangeable NMR probe cassette and methods thereof |
| CN104390883A (en) * | 2014-11-10 | 2015-03-04 | 西南石油大学 | Novel adsorption and desorption experiment device and novel adsorption and desorption experiment method |
| CN105277582B (en) * | 2015-10-22 | 2018-01-12 | 成都岩心科技有限公司 | The special core holding unit of nuclear magnetic resonance |
| CN105277582A (en) * | 2015-10-22 | 2016-01-27 | 成都岩心科技有限公司 | Special core holder for nuclear magnetic resonance |
| CN107435538A (en) * | 2016-05-27 | 2017-12-05 | 中国石油化工股份有限公司 | A kind of rock core sealing device and encapsulating method |
| CN106525525A (en) * | 2016-10-21 | 2017-03-22 | 中联煤层气国家工程研究中心有限责任公司 | Method for preparing artificial coal core standard sample |
| CN106525525B (en) * | 2016-10-21 | 2020-02-04 | 中联煤层气国家工程研究中心有限责任公司 | Manufacturing method of artificial coal core standard test piece |
| CN107044935A (en) * | 2017-04-26 | 2017-08-15 | 中国石油大学(华东) | The core holding unit and its method of work of a kind of rock fever fracturing experiment |
| CN114112836A (en) * | 2021-11-04 | 2022-03-01 | 中山大学 | Clamp holder suitable for verifying water plugging performance of waterproof material |
| CN114112836B (en) * | 2021-11-04 | 2023-06-30 | 中山大学 | Holder suitable for waterproof material water shutoff performance verifies |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20120606 |
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| CX01 | Expiry of patent term |