CN206546288U - One kind point contact loose sand core model - Google Patents
One kind point contact loose sand core model Download PDFInfo
- Publication number
- CN206546288U CN206546288U CN201720123465.5U CN201720123465U CN206546288U CN 206546288 U CN206546288 U CN 206546288U CN 201720123465 U CN201720123465 U CN 201720123465U CN 206546288 U CN206546288 U CN 206546288U
- Authority
- CN
- China
- Prior art keywords
- pipe shaft
- fill out
- out sand
- tube pipe
- sand tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a kind of point contact loose sand core model, including fill out sand tube pipe shaft, upper end, lower end, compression leg；The upper end, lower end are used for the top and bottom for closing off fill out sand tube pipe shaft；The compression leg is used to tamp the quartz sand in fill out sand tube pipe shaft；The fill out sand tube pipe shaft is structure as a whole；The compression leg is detachably fixed and connected and composed by bottom briquetting and some sections of upper holder blocks；The cross-sectional area of the bottom briquetting is more than the cross-sectional area of upper holder block, and is adapted in the external diameter of bottom briquetting with the internal diameter of the fill out sand tube pipe shaft；Air guide channel is provided with the bottom briquetting, a port of the air guide channel is arranged on the bottom surface of bottom briquetting, another port is arranged on the side of bottom briquetting.The point contact loose sand core model Stability Analysis of Structures that the application is provided, pressure-bearing scope is big；Press overall process, uniform force；The design of pressure tap is to tube wall fanout free region, and dismounting is simple, easy to operate；Import and export flow conductivity stronger.
Description
Technical field
The utility model is related to petroleum works technical field, more particularly to a kind of point contact loose sand core model.
Background technology
Experiment long cores model is a kind of long model substantially not designed for short rock core displacement contrast effect.Pass through length
All kinds of displacement tests that core model is carried out, are conducive to the exploration of phenomenon, rule, but for long cores making, but deposit
In certain difficulty.
The most frequently used long cores in current laboratory are divided into two kinds, and the short rock core of the demoulding is formed by connecting to be formed with fill out sand tube back-up sand.
Wherein, the long cores that short rock core is formed by connecting connect due to being single individual between demoulding rock core itself, there is capillary by force
Pipe is discontinuous, and junction be present.
The utilization rate of this type rock core is fewer and fewer, and fill out sand tube is without having Similar Problems, but in back-up sand pipe die
In the manufacturing process of type, still in the presence of many problems：1. fill out sand tube pipe shaft is usually and is made up of three parts, connection screw thread and two sections
Isometric pipe shaft, during back-up sand, to make sand grains more be compacted, can using tap tube wall by the way of, so to tube wall injury compared with
To be serious, or even distortion, in addition, the tubing string for tamping quartz sand is an overall long column shape structure, also hold during tamping
Easily it is distorted；2. during the back-up sand of sandpipe end, because quartz sand is filled with whole pipe shaft, pressure pipe can be exposed when suppressing quartz sand
In end face, last pressing process, force will not be too steady, can generally reduce force and ensure to make safety, this is also resulted in
End section rock core is more loose；3. in order to determine intermediate pressure, pressure tap has been welded at pipe shaft 1/2, the process can be led
Cause tube wall slight deformation；4. the termination guiding gutter of common fill out sand tube is close to quartz sand.Between the only mesh of alternating floor 120 filter screen,
It is unfavorable for water conservancy diversion.
Above mentioned problem can produce certain influence to the development of laboratory experiment, be unfavorable for the accuracy of experiment.
Utility model content
The purpose of this utility model is that the defect for solving above-mentioned prior art presence neither injures fill out sand tube there is provided one kind
The point with good water conservancy diversion contacts loose sand core model to pipe shaft again.
One kind point contact loose sand core model, including fill out sand tube pipe shaft, upper end, lower end, compression leg；The upper end
Head, lower end are used for the top and bottom for closing off fill out sand tube pipe shaft；The compression leg is used to tamp the stone in fill out sand tube pipe shaft
Sand；
The upper end includes enclosing cover and is arranged on the filling at enclosing cover center, and the gap between enclosing cover and filling is fill out sand tube
The tube wall end position of pipe shaft, enclosing cover is fixedly connected with the outer tube wall of the upper end of the sandpipe pipe shaft；The filling insertion
Inside fill out sand tube pipe shaft, and it is provided with filling rubber ring；Clog as the pipe circulation road with hollow structure, in the pipe stream
The end of passage has blocked screen pack cake；
The lower end is identical with upper end header structure；
The fill out sand tube pipe shaft is structure as a whole, and the length of fill out sand tube pipe shaft is more than the rock core length for needing to prepare, back-up sand
The difference of pipe pipe shaft length and the rock core length is the stemming length and lower end stemming length sum of lower end；In fill out sand tube pipe
Pressure tap is provided with the tube wall of body, the pressure tap is fixed on pipe shaft by way of thread tapping；
The compression leg is detachably fixed and connected and composed by bottom briquetting and some sections of upper holder blocks；The bottom briquetting it is transversal
Area is more than the cross-sectional area of upper holder block, and is adapted in the external diameter of bottom briquetting with the internal diameter of the fill out sand tube pipe shaft；Institute
State and be provided with air guide channel on the briquetting of bottom, a port of the air guide channel is arranged on the bottom surface of bottom briquetting, another end
Mouth is arranged on the side of bottom briquetting.
Further, point contact loose sand core model as described above, above the bottom briquetting and upper holder block in
The heart is provided with externally threaded connecting pole, and in bottom, briquetting and upper holder block is provided centrally with female groove, institute
State between bottom briquetting and upper holder block and be threadedly coupled by the connecting pole between upper holder block and upper holder block with groove.
Further, point contact loose sand core model as described above, the air guide channel is using 45 ° of inclination angles.
Further, point contact loose sand core model as described above, the pressure tap includes passing through thread tapping
Screw hole that mode is fixed on fill out sand tube pipe shaft and the thread cap being threadedly coupled with the screw hole, the screw hole is with filling out
Connected inside sandpipe pipe shaft, the thread cap is hollow structure, and screen pack has been blocked on the thread cap.
Further, point contact loose sand core model as described above, is provided with handle at the top of enclosing cover, this
Through hole is provided with hand, and the through hole is connected with the pipe circulation road inside the filling.
Further, point contact loose sand core model as described above, the whole inwall of fill out sand tube pipe shaft is polishing
Face.
Beneficial effect：
The point contact loose sand core model Stability Analysis of Structures that the application is provided, pressure-bearing scope is big；Press overall process, uniformly
Force；The design of pressure tap is to tube wall fanout free region, and dismounting is simple, easy to operate；Import and export flow conductivity stronger.
Brief description of the drawings
Fig. 1 is the application fill out sand tube pipe shaft and upper and lower termination combining structure schematic diagram；
Fig. 2 is the application upper end structural representation；
Fig. 3 is the application compression leg structural representation；
Fig. 4 is that water surveys permeability curve figure；
Fig. 5 is water drive oil design sketch；
Fig. 6 is pressure tap structural representation.
Embodiment
To make the purpose of this utility model, technical scheme and advantage clearer, below technical side in the utility model
Case is clearly and completely described, it is clear that described embodiment is a part of embodiment of the utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of the utility model protection.
As shown in Figure 1-Figure 3, the point contact loose sand core model that the application is provided, including fill out sand tube pipe shaft 2, upper end
First 1, lower end 4, compression leg；The upper end 1, lower end 4 are used for the top and bottom for closing off fill out sand tube pipe shaft 2；It is described
Compression leg 3 is used to tamp the quartz sand in fill out sand tube pipe shaft 2；
The upper end 1 includes enclosing cover 11 and is arranged on the filling 12 at enclosing cover center, between enclosing cover 11 and filling 12 between
Gap is the tube wall end position of fill out sand tube pipe shaft 2, and enclosing cover 11 and the outer tube wall of the upper end of the sandpipe pipe shaft 2 fix company
Connect；The filling 12 is inserted in inside fill out sand tube pipe shaft, and is provided with rubber ring 14 in filling 12；Filling 12 is with hollow
The pipe circulation road of structure, screen pack cake 15 has been blocked in the end of the pipe circulation road；
Specifically, it is φ 3 pipe circulation road inside the filling 12, the end face of the pipe circulation road is contacted with rock core, is anti-
Only sand body enters pipe circulation road, and screen pack cake 15 has been blocked on the end face of pipe circulation road.Because upper end 1 and lower end 4 are equal
With pipe circulation road, therefore, not only beneficial to the discharge of gas between sand grains inside back-up sand pipe shaft, moreover, being prepared in strip rock core
After good, intake one end water outlet to determine the permeability of rock core by the pipe circulation road one end.
The mesh number of the screen pack cake is 120 mesh, and the use of screen pack cake avoids the straight of rock core sand grains and pipe circulation road
Contact, flow conductivity is preferable.
The lower end 4 is identical with the structure of upper end 1, and simply both stemming lengths are different；
The fill out sand tube pipe shaft 2 is structure as a whole, and the length of fill out sand tube pipe shaft 2 is more than the rock core length for needing to prepare, and fills out
The difference of the length of sandpipe pipe shaft 2 and the rock core length is the length of filling 12 and lower end stemming length sum of lower end 4；
Pressure tap 21 is provided with the tube wall of fill out sand tube pipe shaft 2, the pressure tap 21 is consolidated by way of thread tapping
It is scheduled on pipe shaft；
The fill out sand tube pipe shaft 2 is structure as a whole；The compression leg 3 is detachable by bottom briquetting 32 and some sections of upper holder blocks 31
It is fixedly connected with composition；The cross-sectional area of the bottom briquetting 32 is more than the cross-sectional area of upper holder block 31, and in bottom briquetting 32
The internal diameter of external diameter and the fill out sand tube pipe shaft 2 is adapted；Air guide channel 321 is provided with the bottom briquetting 32, the air guide
The a port of passage 321 is arranged on the bottom surface of bottom briquetting 32, and another port is arranged on the side of bottom briquetting 32.
Specifically, when in use, lower end 4 is fixed on to the lower end of fill out sand tube pipe shaft 2 first, then carries out loading quartz
Sand, is often loaded after the quartz sand of certain mass, is tamped using compression leg 3, because compression leg 3 is by bottom briquetting 32 and some sections
Upper holder block 31 is fixedly connected with composition, initially load quartz sand tamped when, upper holder block 31 connection number it is many, with
In fill out sand tube pipe shaft 2 in the continuous uphill process of quartz sand, upper holder block 31 on compression leg 3 also constantly dismounting therewith, when having tamped
Bi Hou, the upper end of fill out sand tube pipe shaft 2 is fixed block using upper end 1.
In actual applications, because the length of rock core is fixed 50cm, and fill out sand tube pipe shaft length of the prior art
For 50cm, in this way, compression leg can expose when suppressing quartz sand in the end face of fill out sand tube pipe shaft, last pressing process, compression leg exerts a force
Will not be too steady, it can generally reduce force and ensure to make safety, it is more loose that this also has led to end section rock core, and
The overall length of the application fill out sand tube pipe shaft 2 is 60cm, and (7cm in this 10cm in pipe shaft upper end is empty by longer than the length of rock core 10cm
The filling of chamber and upper end coincide, and the 3cm cavitys of pipe shaft lower end and the filling of lower end coincide), in this way, when rock core is suppressed,
Just to the end face of rock core can also there is a vertically stable pressure by compression leg, that is to say, that during convenient compacting rock core
Make power, even if so that rock core its end face prepared is also that pressure density is roughly the same with the center section of rock core, so that
Avoid compression leg force unstable, cause the problem of rock core end face is evacuated so that the compacting of end section rock core is more close.
Further, since filling 12 is contacted with the inside pipe wall of back-up sand pipe shaft, and rubber ring 14 is arranged on the outer of filling 12
Place, rather than as routine techniques be that rubber ring is set on the interior base of upper lid, so that upper and lower end seals
More preferably, giving full play to can O-ring sealing function for quartz sand effect in back-up sand pipe shaft.
Further, since compression leg is the long column shape structure of an entirety in the prior art, and the length of fill out sand tube pipe shaft is longer,
During being tamped using compression leg, compression leg can be made to produce flexural deformation, and if the compression leg of the application be by bottom briquetting 32 and
Dry section upper holder block 31 is fixedly connected with composition, therefore, is unlikely to deform during tamping, and fill out sand tube pipe shaft 2 itself
It is an overall structure, tube wall will not be also damaged by the way of tube wall is tapped during back-up sand.
Further, since the air guide channel 321 is provided with compression leg, during quartz sand is tamped, it is possible to will
Gas is discharged by air guide channel 321 between sand grains, and its cross-sectional area of all upper holder blocks 31 of compression leg is less than fill out sand tube pipe shaft 2
Cross-sectional area, therefore, just constitutes certain gap between the outer wall of upper holder block 31 and the inwall of fill out sand tube pipe shaft 2, and between being somebody's turn to do
Gap and the outlet of the air guide channel 321, in this way, just advantageously gas is effectively discharged between sand grains.
Further, on the basis of point contact loose sand core model as described above, this application provides one kind
The connected mode of bottom briquetting 32 and upper holder block 31, that is, be threadedly coupled, and is specially：On bottom briquetting 32 and upper holder block 31
Be provided centrally with carrying externally threaded connecting pole 311, in bottom briquetting 32 and upper holder block 31 be provided centrally with carry internal thread
Groove, it is described to pass through the connecting pole between bottom briquetting 32 and upper holder block 31 and between upper holder block 31 and upper holder block 31
311 are threadedly coupled with groove.
Specifically, the application compression leg by be 10cm length the bullet for being threaded joint one by one, can be with
Dismounting, it is to avoid the depression bar for purchasing many different lengths is pressed, saving material.
Further, on the basis of point contact loose sand core model as described above, the air guide channel 321 is adopted
With 45 ° of inclination angles.
Specifically, the application gas passage 321 not only can effectively discharge gas between sand grains using 45 ° of inclination angles, but also
Flour sand can be avoided to fly to alter.
Further, on the basis of point contact loose sand core model as described above, dismantle and take for convenience
Take, the top of enclosing cover 11 is provided with handle 13, through hole is provided with the handle 13, the through hole and leading inside the filling 12
Chute is connected.
Further, as shown in fig. 6, the pressure tap 21 includes being fixed on fill out sand tube pipe shaft 2 by thread tapping mode
On screw hole 211 and the thread cap 212 that is threadedly coupled with the screw hole 211, the screw hole 211 and fill out sand tube pipe shaft
2 inside are connected, and the thread cap 212 is hollow structure, have been blocked on the thread cap 212 with screen pack, and fill out sand tube
It is even to be disposed with three pressure taps.
The various parameters of back-up sand pipe shaft can be measured on the thread cap 212 with install sensor, fill out sand tube is for example measured
Internal pressure；When needing to measure the permeability of rock core, one end to back-up sand pipe shaft is passed through water, and water is after rock core from bottom
Flowed out respectively with several pressure taps 21 this described；When need not measure pressure, the end of thread cap 212 is blocked, it is to avoid
Communicated with the external world.
Specifically, the pressure tap 21, which is really one, can place the space of sensor, and prior art is by filling out
A through hole is drilled through on sandpipe pipe shaft, the space for then fixing a placement sensor on the through hole by welding earthing mode holds
Device, and during welding, fill out sand tube pipe shaft is deformed, so that cause the rock core prepared to deform, and then
Influence the accuracy of experimental test data；And the application is to drill through through hole on fill out sand tube pipe shaft by way of tapping, then
The mode being connected through a screw thread is fixedly connected with the space container of a placement sensor, in this way, avoiding fill out sand tube pipe shaft hair
Change shape, so as to also just improve the accuracy of experimental test data relatively.
Described pressure tap is to be fixed on by the way of thread tapping on pipe shaft, and internal diameter 2mm, easy to disassemble, replacing is adopted
It is preferable with "O"-ring sealing effectiveness.Pressure tap has been disposed respectively at the 1/4 of back-up sand pipe shaft, 1/2,3/4.
The whole internal polishing of the fill out sand tube pipe shaft of the application, so as to promote contact of the tube wall with quartz sand particle, on
End has been reserved 70mm and arranged in pairs or groups with long termination, when not installing termination, and the depression bar that rock core is tamped can be made in rock core end by having more part
Keep vertical, 30mm has been reserved in lower end.
The utility model is further illustrated below by embodiment：
Embodiment：
(1) assembling of the model is carried out：
1. O-ring is put, coating lubricating oil installs screen membrane and annulus pinhole disk, lower end is installed into pipe shaft, screwed
Be screwed lower end；
2. pressure tap is blocked using plug；
(2) back-up sand operation is carried out.General back-up sand in five times, is respectively filled in the quartz sand of 80g different meshes every time, using shaking
Dynamic device vibration 20s, after compression leg constant pressure 5 minutes, back-up sand, vibration, compacting, are higher by rock core face 2cm for the last time again
Apply swaging operation (test of many times result shows to have more what 2cm sand bodies were tamped, and it is 50cm just to make rock core length), using corresponding
Compacting tool set 25MPa constant pressures 5 minutes, are finally putting into after long termination constant pressure 5MPa, carry out die assembly shaping, are named as A pipes.
(3) horizontal valve is dosed at two ends, snap joint, tail pipe etc., determines the overall dry weight M1 of rock core.
(4) Related Experimental Study is carried out：Carry out water and survey permeability experiment, connect experiment flow, determine water and survey permeability K,
As shown in Figure 4.
(5) saturation crude oil, the saturation crude oil 70mPas by the way of unsteady flow speed, flow velocity 0.1mL/min, 0.2mL/
Min, 0.5mL/min, 1mL/min difference saturation 12h, 4h, 4h, 1h.Calculate crude oil saturation degree, and aging 2d.
(6) flood pot test is carried out, using flow velocity 1mL/min displacement crude oil, observation displacement dynamic is shown in Fig. 5.Experimental result
Show, long cores model sealing is good, can preferably simulate displacement test, simulation effect is pretty good, can reach indoor real
Test requirement.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment technology of the utility model
The spirit and scope of scheme.
Claims (6)
1. one kind point contact loose sand core model, it is characterised in that including fill out sand tube pipe shaft (2), upper end (1), lower end
Head (4), compression leg；The upper end (1), lower end (4) are used for the top and bottom for closing off fill out sand tube pipe shaft (2)；It is described
Compression leg (3) is used to tamp the quartz sand in fill out sand tube pipe shaft (2)；
The upper end (1) includes enclosing cover (11) and is arranged on the filling (12) at enclosing cover center, enclosing cover (11) and filling (12) it
Between gap be fill out sand tube pipe shaft (2) tube wall end position, the upper end of enclosing cover (11) and the sandpipe pipe shaft (2) it is outer
Tube wall is fixedly connected；The filling (12) is inserted in inside fill out sand tube pipe shaft, and is provided with rubber ring (14) in filling (12)；
It is the pipe circulation road with hollow structure to clog (12), and screen pack cake (15) has been blocked in the end of the pipe circulation road；
The lower end (4) is identical with upper end (1) structure；
The fill out sand tube pipe shaft (2) is structure as a whole, and the length of fill out sand tube pipe shaft (2) is more than the rock core length for needing to prepare, and fills out
The difference of sandpipe pipe shaft (2) length and the rock core length for lower end (4) filling (12) length and lower end stemming length it
With；Pressure tap (21) is provided with the tube wall of fill out sand tube pipe shaft (2), the pressure tap (21) is consolidated by way of thread tapping
It is scheduled on pipe shaft；
The compression leg (3) is detachably fixed and connected and composed by bottom briquetting (32) and some sections of upper holder blocks (31)；The bottom pressure
The cross-sectional area of block (32) is more than the cross-sectional area of upper holder block (31), and in the external diameter and the fill out sand tube pipe of bottom briquetting (32)
The internal diameter of body (2) is adapted；Air guide channel (321) is provided with the bottom briquetting (32), the one of the air guide channel (321)
Individual port is arranged on the bottom surface of bottom briquetting (32), and another port is arranged on the side of bottom briquetting (32).
2. point contact loose sand core model according to claim 1, it is characterised in that the briquetting (32) and upper in bottom
Briquetting (31) being provided centrally with above carries externally threaded connecting pole (311), briquetting (32) and upper holder block (31) in bottom
Be provided centrally with female groove, it is described between bottom briquetting (32) and upper holder block (31) and upper holder block (31) with
It is threadedly coupled between upper holder block (31) by the connecting pole (311) with groove.
3. point contact loose sand core model according to claim 1, it is characterised in that the air guide channel (321)
Using 45 ° of inclination angles.
4. point contact loose sand core model according to claim 1, it is characterised in that the pressure tap (21) includes
Screw hole (211) on fill out sand tube pipe shaft (2) is fixed on by thread tapping mode and connected with the screw hole (211) screw thread
The thread cap (212) connect, the screw hole (211) inside fill out sand tube pipe shaft (2) with connecting, and the thread cap (212) is hollow
Structure, screen pack has been blocked on the thread cap (212).
5. point contact loose sand core model according to claim 1, it is characterised in that set at the top of enclosing cover (11)
Handle (13) is equipped with, through hole is provided with the handle (13), the through hole pipe circulation road internal with the filling (12) is connected.
6. point contact loose sand core model according to claim 1, it is characterised in that in the fill out sand tube pipe shaft is whole
Wall is buffed surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720123465.5U CN206546288U (en) | 2017-02-10 | 2017-02-10 | One kind point contact loose sand core model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720123465.5U CN206546288U (en) | 2017-02-10 | 2017-02-10 | One kind point contact loose sand core model |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206546288U true CN206546288U (en) | 2017-10-10 |
Family
ID=59993215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720123465.5U Expired - Fee Related CN206546288U (en) | 2017-02-10 | 2017-02-10 | One kind point contact loose sand core model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206546288U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644672A (en) * | 2017-02-10 | 2017-05-10 | 西南石油大学 | Point-contact loosening sandstone core model |
-
2017
- 2017-02-10 CN CN201720123465.5U patent/CN206546288U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644672A (en) * | 2017-02-10 | 2017-05-10 | 西南石油大学 | Point-contact loosening sandstone core model |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102720476B (en) | O-shaped well physical simulation experiment device | |
| CN102797458B (en) | For the three-dimensional simulation device of bottom and edge water | |
| CN208206964U (en) | Simulate high-pressure slip-casting device under buried stratum river channels | |
| CN106840977A (en) | Slurry filling imitation device | |
| CN206546288U (en) | One kind point contact loose sand core model | |
| CN103256047A (en) | Method for researching variable mass multiphase flowing regular in horizontal well fracturing completion method | |
| CN106401577A (en) | Visual testing device and method for simulating bottom water coning of bottom water gas reservoir gas well | |
| CN203203897U (en) | Shale residual gas determining sample tank | |
| CN110514571A (en) | A kind of high gas rate well sand control method and the preferred method of precision | |
| CN207044516U (en) | Casting machine drawing mechanism is used in a kind of polyurethane wood-imitation material production | |
| CN104234691B (en) | On-line multiphase flowmeter during a kind of high-precision real for oil field | |
| CN106644672A (en) | Point-contact loosening sandstone core model | |
| CN108798655A (en) | Experimental provision is adopted in a kind of three gas conjunction of coal bed gas loss | |
| CN203441449U (en) | Adjustable sliding sleeve sieve tube for layered oil production | |
| CN207052178U (en) | A kind of fracture-cavity type carbonate fracture network flow device | |
| CN206459931U (en) | Determine the physical simulating device of salt hole air reserved storeroom residue space utilization rate | |
| CN201262083Y (en) | Double-flow passage current collector | |
| CN208383662U (en) | A kind of device measuring powder infiltration coefficient | |
| CN212716576U (en) | High-pressure liquid quantitative sand carrying device | |
| CN208255228U (en) | A kind of core holding unit of included back pressure function | |
| CN209277869U (en) | A kind of oil well intelligent differential pressure on-line metering system | |
| CN209892191U (en) | Three-dimensional gas cap bottom water oil reservoir development simulation device | |
| CN209557731U (en) | A kind of voltage adjusting device installing microfluidic valve additional | |
| CN205981794U (en) | Resource prospection sampler barrel | |
| CN206787647U (en) | A kind of novel adjustable flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171010 Termination date: 20210210 |