CN113958279A - Magnetic force triggering multidirectional pressure maintaining coring device with simple structure and rock sample extraction method - Google Patents
Magnetic force triggering multidirectional pressure maintaining coring device with simple structure and rock sample extraction method Download PDFInfo
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- CN113958279A CN113958279A CN202111274035.0A CN202111274035A CN113958279A CN 113958279 A CN113958279 A CN 113958279A CN 202111274035 A CN202111274035 A CN 202111274035A CN 113958279 A CN113958279 A CN 113958279A
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- 239000011435 rock Substances 0.000 title claims abstract description 9
- 238000000605 extraction Methods 0.000 title claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 230000001960 triggered effect Effects 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
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- Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention relates to a magnetic force triggering multidirectional pressure maintaining coring device with a simple structure and a rock sample extraction method, wherein the magnetic force triggering multidirectional pressure maintaining coring device comprises a rock core barrel, an outer barrel and a flap valve, the flap valve comprises a valve seat and a sealing valve clack, the valve seat is coaxially arranged in the outer barrel, the sealing valve clack is provided with a first magnetic part, the valve seat is provided with a second magnetic part for attracting the first magnetic part, and the outer barrel is provided with a third magnetic part for generating repulsive force to the first magnetic part; and a triggering mechanism is not arranged in the magnetic force triggering multidirectional pressure maintaining coring device. The core extractor is triggered to be closed by magnetic force, initial sealing is reliable, a triggering mechanism is omitted, and the structure of the core extractor is simplified; according to the magnetic valve, three radially magnetized tile-shaped magnets form a closed magnetic field loop, and the action area between the first magnetic part and the second magnetic part is large after the sealing valve clack is closed, so that larger attraction is realized; at the same time, a larger initial sealing force can be formed, so that a reliable squeezing seal is formed between the sealing valve clack and the valve seat.
Description
Technical Field
The invention relates to the technical field of deep pressure maintaining sampling, in particular to a magnetic force triggered multi-directional pressure maintaining coring device with a simple structure and a rock sample extraction method.
Background
Pressure-maintaining coring refers to a coring technology for maintaining or approaching the formation pressure, and a precious sample in an in-situ stress environment is obtained by maintaining an original stress environment of a rock sample. Further, the in-situ parameters in the rock sample, such as oil-water saturation, in-situ gas pressure and other important data, can be quantitatively analyzed. Therefore, pressure maintaining coring is one of the important scientific technologies for realizing accurate development and utilization of deep energy. Wherein, an important part for realizing pressure maintaining is a pressure maintaining controller, and the lower end of the core chamber is closed by the underground automatic closing of the pressure maintaining controller.
At present, pressure maintaining and coring devices with flap type pressure maintaining controllers are widely researched, for example, a coring device disclosed in chinese patent document CN109458147A includes a flap valve including a valve seat and a sealing valve flap, the valve seat is coaxially installed on an inner wall of an outer cylinder of a drilling machine, one end of the sealing valve flap is hinged to an outer side wall of an upper end of the valve seat through a spring leaf, and the sealing valve flap is turned over under the action of the spring leaf elasticity and self gravity when the restriction of a core barrel is lost. When drilling in the horizontal or inclined direction, the self weight of the flap valve is difficult to play a role of closing the flap valve and the valve seat, so that the flap valve is only suitable for drilling and coring in the nearly vertical direction.
In addition, the sealing is only realized by the initial elastic force of the elastic sheet and the self weight of the sealing valve clack, so that the initial sealing effect is poor. In order to increase the initial sealing specific pressure, the core barrel is provided with a trigger mechanism with a complex structure, and after the core barrel is lifted to a certain height, the trigger inner barrel of the trigger mechanism falls back to press the sealing valve clack under the action of the elastic force of the trigger spring and the self gravity to apply the sealing specific pressure to the flap valve. The arrangement of the trigger mechanism makes the structure of the coring device complex.
Disclosure of Invention
The application aims to solve the technical problem and provides the magnetic force triggered multi-directional pressure maintaining and coring device with the simple structure and the rock sample extraction method.
The application is realized by the following technical scheme:
the utility model provides a simple structure's magnetic force triggers multidirectional pressurize coring device, includes core barrel, urceolus and flap valve, the flap valve includes disk seat and sealed valve clack, and disk seat coaxial arrangement is in the urceolus, sealed valve clack one end and disk seat upper end swing joint, be equipped with first magnetic part on the sealed valve clack, be equipped with on the disk seat and be used for attracting the second magnetic part of first magnetic part, magnetic force triggers not to establish trigger mechanism in the multidirectional pressurize coring device.
Particularly, the first magnetic part and the second magnetic part are both tile-shaped magnets, the first magnetic part and the sealing valve clack are consistent in walking shape, and the second magnetic part and the valve seat are consistent in walking shape.
Optionally, three second magnetic members are mounted on the valve seat, and the three second magnetic members are arranged at equal intervals along the circumferential direction.
In particular, the three second magnetic members are magnetized in the radial direction.
Optionally, a groove is formed in the outer surface of the sealing valve clack, and the first magnetic part is installed in the groove in the outer surface of the sealing valve clack; a groove is formed in the inner wall of the valve seat, and the second magnetic part is arranged in the groove in the inner wall of the valve seat.
Particularly, the outer cylinder is provided with a third magnetic member for generating repulsive force to the first magnetic member;
when the sealing valve clack is opened by 90 degrees, the first magnetic part on the sealing valve clack is opposite to the third magnetic part on the inner wall of the outer cylinder.
Optionally, the third magnetic member is a tile-shaped magnet, and the third magnetic member and the outer cylinder are identical in shape.
Optionally, the tile-shaped magnet is arranged on the inner wall of the outer cylinder in a groove.
Optionally, the first magnetic member and the third magnetic member are magnetized in a radial direction.
Particularly, the outer cylinder comprises an upper outer cylinder and a lower outer cylinder, the valve seat is arranged in the upper outer cylinder, the upper end of the lower outer cylinder extends into the upper outer cylinder, the upper end surface of the lower outer cylinder is abutted against the lower end surface of the valve seat, and the lower outer cylinder is connected with the upper outer cylinder through threads;
the outer wall of the valve seat is provided with at least one limiting convex part, the inner wall of the upper outer barrel is provided with a limiting groove matched with the limiting convex part, and the limiting convex part is positioned in the limiting groove.
The core barrel is lifted upwards, when the core barrel passes over the top end of the sealing valve clack, the sealing valve clack loses the limitation of the core barrel, and the repulsion of a third magnetic part on the outer barrel to the first magnetic part enables the sealing valve clack to be closed and rotated rapidly; when the sealing valve clack rotates to a certain angle, the sealing valve clack is attracted by the second magnetic part on the valve seat and quickly returns to the top surface of the valve seat to be closed with the valve seat.
Compared with the prior art, the method has the following beneficial effects:
the flap valve is triggered and closed by magnetic force, initial sealing is reliable, a triggering mechanism in the existing coring device is omitted, and the structure of the coring device is simplified while pressure maintaining performance is guaranteed;
2, the closed magnetic field loop is formed by three radial magnetized tile-shaped magnets, the relative area of the magnetic poles is large, and the action area between the first magnetic part and the second magnetic part is large after the sealing valve clack is closed, so that larger attraction force is realized; meanwhile, the magnets magnetized in the radial direction do not interact with each other, so that the direction of the magnetic field lines after the magnetic field is redistributed is more concentrated towards the vertical plane of the sealing valve clack, the magnetic force direction of the sealing valve clack is closer to the direction of the magnetic field lines, a larger initial sealing force is formed, and reliable extrusion sealing is formed between the sealing valve clack and the valve seat;
3, the valve seat and the outer cylinder are limited by the limiting protrusions and the limiting grooves, so that the valve seat and the outer cylinder can be prevented from being displaced circumferentially, and the valve clack is prevented from being influenced by the deviation of the third magnetic part and the first magnetic part; axial displacement of the valve seat is also avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a schematic structural diagram of a magnetic force triggered multi-directional pressure-maintaining coring device when a sealing valve clack is opened;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic structural diagram of a magnetic force triggered multi-directional pressure-maintaining coring device when a sealing valve clack is closed;
FIG. 4 is an enlarged view of a portion of FIG. 3 at B;
FIG. 5 is a three-dimensional view of the flap valve;
fig. 6 is a schematic view showing the magnetizing directions of three second magnetic members on the valve seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely used for convenience of description and simplification of description, and do not indicate or imply that the devices or elements that are referred to 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. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1 to 5, the magnetic force triggered multi-directional pressure maintaining and coring device with a simple structure disclosed in the present embodiment includes a core barrel 1, an outer barrel 2, a flap valve 3, an inner rod 5, a core catcher 6 and a coring drill, wherein the core catcher 6 is disposed inside the lower end of the core barrel 1.
The flap valve 3 comprises a valve seat 31 and a sealing valve clack 32, the valve seat 31 is coaxially arranged on the inner wall of the outer barrel 2, a first sealing ring is arranged between the outer wall of the valve seat 31 and the inner wall of the outer barrel 2, and a second sealing ring 7 is arranged on the periphery of the flap valve 3 in a groove.
One end of the sealing valve clack 32 is movably connected with the upper end of the valve seat 31. Alternatively, the valve seat 31 may be pivotally connected to the sealing flap 32 by a pin.
The first magnetic member 41 is mounted on the seal flap 32, and the second magnetic member 42 for attracting the first magnetic member 41 is mounted on the valve seat 31.
Specifically, a groove is formed in the inner wall of the valve seat 31, and the second magnetic member 42 is fitted in the groove in the inner wall of the valve seat 31. A groove is formed on the outer surface of the sealing valve clack 32, and the first magnetic member 41 is arranged in the groove on the outer surface of the sealing valve clack 32.
Optionally, a third magnetic member 43 is installed in a groove on the inner wall of the outer cylinder 2, and the third magnetic member 43 is used for generating a repulsive force to the first magnetic member 41. Preferably, when the sealing flap 32 is opened by 90 °, the first magnetic member 41 on the sealing flap 32 is opposite to the third magnetic member 43 on the inner wall of the outer cylinder 2.
Specifically, the first magnetic member 41, the second magnetic member 42, and the third magnetic member 43 are all tile-shaped magnets. The first magnetic part 41 is consistent with the shape of the sealing valve clack, the second magnetic part 42 is consistent with the shape of the valve seat 31, and the third magnetic part 43 is consistent with the shape of the outer cylinder 2. Preferably, the outer surface of the first magnetic member 41 is flush with the outer surface of the sealing flap 32, and the inner wall of the second magnetic member 42 is flush with the inner wall of the valve seat 31.
In particular, the number of the second magnetic members 42 is appropriately set as needed. Alternatively, three second magnetic members 42 are arranged on the valve seat 31 at equal intervals in the circumferential direction.
Optionally, the three second magnetic members 42, the three first magnetic members 41, and the three third magnetic members 43 are radially magnetized, and the magnetic field directions of the first magnetic member 41 and the third magnetic member 43 are opposite. The first magnetic member 41 forms a closed loop with the magnetic field of the second magnetic member 42 after being triggered to close.
As shown in fig. 6. The south and north poles of the three second magnetic pieces 42 are consistent, the three second magnetic pieces 42 are distributed in the valve seat 31 to form a complete complex magnetic field, the sealing valve clack 32 is firmly attracted by magnetic force at the closing moment under the action of the magnetic field, elastic-plastic energy generated by the sealing ring is overcome, and the sealing valve clack is finally tightly attached to the valve seat 31 to form initial magnetic sealing.
In addition, a closed magnetic field loop is formed by three radially magnetized tile-shaped magnets, the relative area of the magnetic poles is large, and after the sealing valve clack 32 is closed, the action area between the first magnetic part 41 and the second magnetic part 42 is large, so that larger attraction force is realized, and the axial direction has a larger relative action area compared with other circumferential magnetization directions.
Meanwhile, the magnets which are magnetized in the radial direction cannot interact with each other, so that the direction of the magnetic field lines is more concentrated towards the vertical surface of the sealing valve clack 32 after the magnetic field is redistributed, the magnetic force direction of the sealing valve clack 32 is closer to the direction of the magnetic field lines, larger initial sealing force is formed, and extrusion sealing is formed between the sealing valve clack 32 and the valve seat 31.
The working principle of the application is as follows:
as shown in fig. 1, 2, when the core barrel 1 is positioned in the valve seat 31, the sealing flap 32 is opened by 90 degrees; at this time, the third magnetic member 43 generates a repulsive magnetic force to the first magnetic member 41, which gives an initial power to close the sealing flap 32, but the sealing flap 32 cannot be closed because the sealing flap 32 is confined between the core barrel 1 and the outer barrel 2;
as shown in fig. 3 and 4, when the core barrel 1 is lifted by the inner rod 5 to pass over the top end of the sealing valve flap 32, after the sealing valve flap 32 loses the limit of the core barrel 1, the initial power of the third magnetic member 43 to the sealing valve flap 32 causes the sealing valve flap 32 to rapidly close and rotate; when the sealing valve clack 32 rotates to a certain angle, a closed magnetic field is formed between the first magnetic part 41 and the second magnetic part 42 on the sealing valve clack 32, and a downward magnetic field force is formed, so that the sealing valve clack 32 quickly returns to the top surface of the valve seat 31 and is sealed with the valve seat 31 in a closed manner, and the sealing performance of the flap valve is greatly improved.
Because of the reliable initial seal that can obtain under the magnetic force effect of sealing valve clack 32 and valve seat 31, consequently this application has cancelled trigger mechanism, when guaranteeing the pressurize performance, has simplified the structure of coring device.
Example two
In the embodiment, at least one limiting protrusion 311 is arranged on the outer wall of the valve seat 31, the limiting protrusion 311 is integrally manufactured with the valve seat 31, and the bottom surface of the limiting protrusion 311 is flush with the lower end surface of the valve seat 31. The number of the limit protrusions 311 is set reasonably as required, and at least two limit protrusions 311 are preferably arranged at equal intervals along the circumferential direction of the valve seat 31.
It should be noted that the top surface of the convex stopper 311 is lower than the first seal ring on the valve seat 31.
The outer cylinder 2 includes an upper outer cylinder 21 and a lower outer cylinder 22. The inner wall of the upper outer cylinder 21 is provided with a limit groove 211 matched with the limit protrusion 311, taking two limit protrusions 311 symmetrically arranged on the outer wall of the valve seat 31 as an example, the inner wall of the upper outer cylinder 21 is provided with two limit grooves 211 symmetrically arranged.
The valve seat 31 and the third magnetic member 43 are mounted in the upper outer cylinder 21, the upper end of the lower outer cylinder 22 extends into the upper outer cylinder 21, the upper end surface of the lower outer cylinder 22 abuts against the lower end surface of the valve seat 31, the lower outer cylinder 22 is connected with the upper outer cylinder 21 through threads, and the limiting convex parts 311 are located in the limiting grooves 211 one by one.
The valve seat 31 and the upper outer cylinder 21 are limited by the limiting convex part 311 and the limiting groove 211, so that on one hand, the valve seat 31 and the upper outer cylinder 21 can be prevented from being displaced circumferentially in the using process, so that the second magnetic part 42 and the first magnetic part 41 are deviated, and the closing of the sealing valve clack 32 is influenced; meanwhile, under the matching of the lower outer cylinder 22, the axial displacement of the valve seat 31 can be avoided; on the other hand, the position-limiting protrusion 311 and the position-limiting groove 211 can play a positioning role during assembly, so that the third magnetic element 43 and the first magnetic element 41 can be quickly aligned during assembly.
The above embodiments are provided to explain the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. Simple structure's multidirectional pressurize coring device is triggered to magnetic force, including core barrel, urceolus and flap valve, the flap valve includes disk seat and sealed valve clack, and disk seat coaxial arrangement is in the urceolus, sealed valve clack one end and disk seat upper end swing joint, its characterized in that: the magnetic force triggering multidirectional pressure maintaining and coring device is characterized in that a first magnetic part is arranged on the sealing valve clack, a second magnetic part used for attracting the first magnetic part is arranged on the valve seat, and a triggering mechanism is not arranged in the magnetic force triggering multidirectional pressure maintaining and coring device.
2. The magnetically triggered multi-dwell coring device of claim 1, wherein: the first magnetic part and the second magnetic part are tile-shaped magnets, the first magnetic part and the sealing valve clack are consistent in shape, and the second magnetic part and the valve seat are consistent in shape.
3. The magnetically triggered multi-dwell coring device of claim 1, 2 or 3, wherein: three second magnetic pieces are arranged on the valve seat and are arranged at equal intervals along the circumferential direction.
4. The magnetically triggered multi-dwell coring device of claim 3, wherein: and the three second magnetic pieces are magnetized in the radial direction.
5. The magnetically triggered multi-dwell coring device of claim 1, 2 or 4, wherein: the outer surface of the sealing valve clack is provided with a groove, and the first magnetic part is arranged in the groove on the outer surface of the sealing valve clack; a groove is formed in the inner wall of the valve seat, and the second magnetic part is arranged in the groove in the inner wall of the valve seat.
6. The magnetically triggered multi-dwell coring device of claim 1, 2 or 4, wherein: the outer cylinder is provided with a third magnetic part for generating repulsive force to the first magnetic part;
when the sealing valve clack is opened by 90 degrees, the first magnetic part on the sealing valve clack is opposite to the third magnetic part on the inner wall of the outer cylinder.
7. The magnetically triggered multi-dwell coring device of claim 6, wherein: the third magnetic part is a tile-shaped magnet, and the shape of the third magnetic part is consistent with that of the outer cylinder; and the groove on the inner wall of the outer cylinder is provided with the third magnetic part.
8. The magnetically triggered multi-dwell coring device of claim 7, wherein: the first magnetic part and the third magnetic part are magnetized in the radial direction.
9. The magnetically triggered multi-dwell coring device of claim 1, 2, 4, 7 or 8, wherein: the outer cylinder comprises an upper outer cylinder and a lower outer cylinder, the valve seat is arranged in the upper outer cylinder, the upper end of the lower outer cylinder extends into the upper outer cylinder, the upper end surface of the lower outer cylinder is abutted against the lower end surface of the valve seat, and the lower outer cylinder is connected with the upper outer cylinder through threads;
the outer wall of the valve seat is provided with at least one limiting convex part, the inner wall of the upper outer barrel is provided with a limiting groove matched with the limiting convex part, and the limiting convex part is positioned in the limiting groove.
10. A method of rock sample extraction using a magnetically triggered multi-dwell coring device as claimed in any one of claims 1-9, wherein: lifting the core barrel upwards, wherein when the core barrel passes over the top end of the sealing valve clack, the sealing valve clack loses the limitation of the core barrel, and the repulsion of a third magnetic part on the outer barrel to the first magnetic part enables the sealing valve clack to be rapidly closed and rotated; when the sealing valve clack rotates to a certain angle, the sealing valve clack is attracted by the second magnetic part on the valve seat and quickly returns to the top surface of the valve seat to be closed with the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111274035.0A CN113958279A (en) | 2021-10-29 | 2021-10-29 | Magnetic force triggering multidirectional pressure maintaining coring device with simple structure and rock sample extraction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111274035.0A CN113958279A (en) | 2021-10-29 | 2021-10-29 | Magnetic force triggering multidirectional pressure maintaining coring device with simple structure and rock sample extraction method |
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| CN113958279A true CN113958279A (en) | 2022-01-21 |
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| CN202111274035.0A Pending CN113958279A (en) | 2021-10-29 | 2021-10-29 | Magnetic force triggering multidirectional pressure maintaining coring device with simple structure and rock sample extraction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115876516A (en) * | 2022-07-12 | 2023-03-31 | 平顶山天安煤业股份有限公司 | Self-cleaning pressure maintaining coring equipment and use method thereof |
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| CN112963108A (en) * | 2021-03-31 | 2021-06-15 | 四川大学 | Coring equipment capable of realizing pressure maintaining by magnetic force triggering |
| CN113202435A (en) * | 2021-03-31 | 2021-08-03 | 深圳大学 | Pressure maintaining control device based on magnetic field effect and fidelity controller |
| CN113513597A (en) * | 2021-03-31 | 2021-10-19 | 深圳大学 | Magnetic pressure maintaining control device |
| CN216043606U (en) * | 2021-10-21 | 2022-03-15 | 四川大学 | Anti-displacement magnetic-triggering pressure-maintaining controller and limiting structure thereof |
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2021
- 2021-10-29 CN CN202111274035.0A patent/CN113958279A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150285068A1 (en) * | 2014-04-03 | 2015-10-08 | Baker Hughes Incorporated | Downhole Tri-Axial Induction Electromagnetic Tool |
| CN209340519U (en) * | 2018-08-13 | 2019-09-03 | 四川大学 | A kind of reverse turning bed structure of automatic trigger |
| CN112963108A (en) * | 2021-03-31 | 2021-06-15 | 四川大学 | Coring equipment capable of realizing pressure maintaining by magnetic force triggering |
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| CN115876516A (en) * | 2022-07-12 | 2023-03-31 | 平顶山天安煤业股份有限公司 | Self-cleaning pressure maintaining coring equipment and use method thereof |
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