CN113090211A - Broken stratum rock core protection device - Google Patents
Broken stratum rock core protection device Download PDFInfo
- Publication number
- CN113090211A CN113090211A CN202110425505.2A CN202110425505A CN113090211A CN 113090211 A CN113090211 A CN 113090211A CN 202110425505 A CN202110425505 A CN 202110425505A CN 113090211 A CN113090211 A CN 113090211A
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- China
- Prior art keywords
- ring
- support
- section
- core
- protection device
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- 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.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims description 32
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 4
- 229910001234 light alloy Inorganic materials 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000005070 sampling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/06—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver having a flexible liner or inflatable retaining means
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a broken stratum core protection device, which relates to the technical field of coring drilling and comprises a clamp spring seat, a clamp spring, a support ring, a film forming mechanism and a core tube, wherein the clamp spring is arranged at one end inside the clamp spring seat, the end part of the core tube is arranged at the other end inside the clamp spring seat, the support ring is arranged inside the clamp spring seat and positioned at one side of the core tube, an annular cavity is formed among the clamp spring seat, the support ring and the core tube, an annular opening is arranged at one side of the annular cavity and arranged between the support ring and the core tube, the film forming mechanism comprises a plurality of layers of high-elasticity and toughness film coils and connecting rings, the plurality of layers of high-elasticity and toughness film coils are arranged in the annular cavity, and one end of each layer of high-elasticity and toughness film. The broken stratum core protection device provided by the invention enables loose and broken cores to smoothly enter the core tube, so that core blockage is prevented, and the repeated footage and core sampling rate are improved.
Description
Technical Field
The invention relates to the technical field of coring drilling, in particular to a broken formation core protection device.
Background
Energy and resources are important material bases for economic development and social progress, shallow mineral resources are gradually exhausted along with the high-speed development of economy in China, and mineral deposit exploration is gradually developed towards deep parts. Core drilling is the most direct and common exploration means, whether shallow or mid-deep stratum mineral resource exploration. During core drilling operation, broken strata can be encountered frequently, and the phenomenon of core blockage is particularly serious. After the core is blocked, the coring rate can be reduced, the repeated footage can be reduced, the drilling cost can be increased, and the influence on the medium-length hole coring drilling is more obvious.
At present, the phenomenon of core blockage can be relieved to a certain extent by using a downhole hydraulic impactor and technical means such as internal coating and lubrication of a core barrel, but more technical means are passive defense, and the active protection effect is not obvious.
Disclosure of Invention
In order to solve the technical problems, the invention provides a rock core protection device for a broken stratum, which enables loose and broken rock cores to smoothly enter a rock core pipe, further prevents the rock cores from being blocked, and improves the repetition footage and the rock core sampling rate.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a broken stratum core protection device which comprises a clamp spring seat, a clamp spring, a support ring, a film forming mechanism and a core tube, wherein the clamp spring is installed at one end inside the clamp spring seat, the end part of the core tube is installed at the other end inside the clamp spring seat, the support ring is installed inside the clamp spring seat and located on one side of the core tube, an annular cavity is formed among the clamp spring seat, the support ring and the core tube, an annular opening is formed in one side of the annular cavity and arranged between the support ring and the core tube, the film forming mechanism comprises a plurality of layers of high-elastic toughness film coils and connecting rings, the plurality of layers of high-elastic toughness film coils are arranged in the annular cavity, and one end of each layer of high-elastic toughness film coil extends out of the annular opening and is connected with the connecting rings.
Preferably, the multi-layer high-elastic toughness film ring is formed by rolling one end of a long cylindrical high-elastic toughness film.
Preferably, the support ring is threaded into the circlip seat and the end of the core barrel is threaded into the circlip seat.
Preferably, the support ring includes support screw thread section and support cylinder section that connects gradually, the external diameter of support screw thread section is greater than the external diameter of support cylinder section, support screw thread section set up in being close to the one end of jump ring.
Preferably, one end of the supporting cylindrical section, which is far away from the supporting threaded section, is provided with a plurality of rectangular grooves along the circumferential direction.
Preferably, an annular protrusion is arranged on the inner wall of the clamp spring seat, and the supporting thread section abuts against the annular protrusion.
Preferably, the core barrel comprises a first cylinder section, a thread installation section and a second cylinder section which are connected in sequence, the outer diameters of the first cylinder section, the thread installation section and the second cylinder section are sequentially increased, and the first cylinder section is arranged at one end close to the support ring.
Preferably, an annular groove is formed in the inner wall of the clamp spring seat, and the annular groove, the annular side wall of the support cylindrical section and the outer end face of the first cylindrical section enclose the annular cavity.
Preferably, the connecting ring is a light alloy ring.
Compared with the prior art, the invention has the following technical effects:
the invention provides a rock core protection device for a fractured stratum, which comprises a clamp spring seat, a clamp spring, a support ring, a film forming mechanism and a core barrel, wherein an annular cavity is formed among the clamp spring seat, the support ring and the core barrel, an annular opening is formed in one side of the annular cavity and arranged between the support ring and the core barrel, the film forming mechanism comprises a plurality of layers of high-elastic toughness film rings and a connecting ring, the plurality of layers of high-elastic toughness film rings are arranged in the annular cavity, and one end of each of the plurality of layers of high-elastic toughness film rings extends out of the annular opening and is connected with the connecting ring. The rock core passes through the jump ring and gets into the core pipe, and the rock core pushes up the go-between and shifts up, and the go-between pulls the high-elastic toughness membrane circle of multilayer to form the one deck protection film on the rock core surface that gets into the core pipe, high-elastic toughness membrane shrink restraint damaged stratum rock core becomes a class of cylindrical, makes loose broken rock core get into the core pipe smoothly, thereby prevents that the rock core from blockking up, improves the rate of taking of rethread footage and rock core.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an exploded view of a fractured formation core protection device provided by the present invention;
FIG. 2 is a schematic structural diagram of a fractured-formation core protector provided by the present disclosure in an initial state;
FIG. 3 is a schematic structural diagram of a state after a core of the broken formation core protection device provided by the invention enters;
FIG. 4 is a front view of a film forming mechanism in the fractured formation core protector provided by the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic structural diagram of a film forming mechanism in the device for protecting a rock core in a fractured formation provided by the present invention;
FIG. 7 is a schematic view of a core barrel of the apparatus for protecting a core of a fractured formation according to the present invention;
fig. 8 is a schematic structural diagram of a support ring in the device for protecting a rock core in a fractured formation provided by the invention.
Description of reference numerals: 100. a formation core crushing protection device; 1. a clamp spring seat; 2. a clamp spring; 3. a support ring; 31. supporting the threaded section; 32. supporting the cylinder segments; 33. a rectangular groove; 4. a film forming mechanism; 41. a plurality of layers of high-elastic and tough membrane rings; 42. a connecting ring; 5. a core barrel; 51. a first cylindrical section; 52. a threaded mounting section; 53. a second cylindrical section; 6. an annular cavity; 7. an annular protrusion.
Detailed Description
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 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a rock core protection device for a broken stratum, which enables a loose and broken rock core to smoothly enter a rock core pipe, further prevents the rock core from being blocked and improves the repeated footage and the rock core sampling rate.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-5, this embodiment provides a device 100 for protecting a rock core in a fractured formation, which includes a clamp spring seat 1, a clamp spring 2, a support ring 3, a film forming mechanism 4 and a core barrel 5, wherein the clamp spring 2 is installed at one end inside the clamp spring seat 1, an end of the core barrel 5 is installed at the other end inside the clamp spring seat 1, the support ring 3 is installed inside the clamp spring seat 1 and located at one side of the core barrel 5, an annular cavity 6 is formed between the clamp spring seat 1, the support ring 3 and the core barrel 5, one side of the annular cavity 6 is provided with an annular opening, the annular opening is arranged between the support ring 3 and the core barrel 5, the film forming mechanism 4 includes a plurality of layers of high elastic and tough film coils 41 and a connection ring 42, the plurality of layers of high elastic and tough, and one end of the multi-layer high-elastic toughness membrane ring 41 extends out of the annular opening and is connected with a connecting ring 42, and the support ring 3 and the core tube 5 play a role in supporting and limiting the multi-layer high-elastic toughness membrane ring 41.
As shown in fig. 6, the multi-layer high elastic and tough film ring 41 is formed by rolling up one end of a long cylindrical high elastic and tough film. Specifically, one end of the long cylindrical high elastic toughness film is rolled up to form a solid annular multi-layer high elastic toughness film ring 41, and the other end is left with a part of the high elastic toughness film for connecting with the connecting ring 42. The inner diameter of the connecting ring 42 in this embodiment can be selected according to actual requirements, and it is only required to ensure that the loose and broken rock core cannot pass through the connecting ring 42.
During operation, the rock core passes through jump ring 2 and gets into core pipe 5, the rock core shifts up against go-between 42, go-between 42 pulls high-elastic toughness membrane circle 41 of multilayer through the high-elastic toughness membrane of the part of being connected with it for more high-elastic toughness membranes are pulled out, thereby form one deck protection film on the rock core surface that gets into core pipe 5, high-elastic toughness membrane shrink restraint damaged stratum rock core becomes cylindrical, make loose broken rock core get into core pipe 5 smoothly, thereby prevent that the rock core from blockking up, improve the footage and rock core rate of taking.
Specifically, the support ring 3 is screwed into the jump ring holder 1, and the end of the core barrel 5 is screwed into the jump ring holder 1.
As shown in fig. 8, the support ring 3 includes a support threaded section 31 and a support cylindrical section 32 that are connected in sequence, the outer diameter of the support threaded section 31 is greater than the outer diameter of the support cylindrical section 32, the support threaded section 31 is disposed at an end close to the snap spring 2, and the support threaded section 31 is in threaded connection with the snap spring seat 1.
Specifically, one end of the supporting cylindrical segment 32, which is away from the supporting threaded segment 31, is provided with a plurality of rectangular grooves 33 in the circumferential direction.
In order to make the support ring 3 installed firmly, the inner wall of the clamp spring seat 1 is provided with an annular protrusion 7, and the support thread section 31 abuts against the annular protrusion 7.
As shown in fig. 7, the core barrel 5 includes a first cylindrical section 51, a threaded mounting section 52 and a second cylindrical section 53 which are connected in sequence, the outer diameters of the first cylindrical section 51, the threaded mounting section 52 and the second cylindrical section 53 are sequentially increased, the first cylindrical section 51 is arranged at one end close to the support ring 3, the threaded mounting section 52 is in threaded connection with the clamp spring seat 1, and the end of the clamp spring seat 1 abuts against a step formed between the threaded mounting section 52 and the second cylindrical section 53.
Specifically, an annular groove is formed in the inner wall of the clamp spring seat 1, and the annular groove, the annular side wall of the support cylinder segment 32 and the outer end face of the first cylinder segment 51 enclose an annular cavity 6.
In this embodiment, the connection ring 42 is a light alloy ring.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. The utility model provides a broken stratum rock core protection device, its characterized in that, includes jump ring seat, jump ring, support ring, film forming mechanism and core barrel, the jump ring install in the inside one end of jump ring seat, the tip of core barrel install in the inside other end of jump ring seat, the support ring install in inside and being located of jump ring seat core barrel one side, the jump ring seat the support ring with form annular cavity between the core barrel, one side of annular cavity is provided with annular opening, annular opening set up in the support ring with between the core barrel, film forming mechanism includes high-elastic toughness diaphragm ring of multilayer and go-between, high-elastic toughness diaphragm ring of multilayer set up in the annular cavity, just the one end of high-elastic toughness diaphragm ring of multilayer by annular opening stretches out and is connected with the go-between.
2. The fractured formation core protection device according to claim 1, wherein the multi-layer high-elastic toughness membrane ring is formed by rolling up one end of a long cylindrical high-elastic toughness membrane.
3. The fractured formation core protection device of claim 1, wherein the support ring is threaded into the jump ring seat and an end of the core barrel is threaded into the jump ring seat.
4. The fractured formation core protection device according to claim 2, wherein the support ring comprises a support threaded section and a support cylindrical section which are sequentially connected, the outer diameter of the support threaded section is larger than that of the support cylindrical section, and the support threaded section is arranged at one end close to the clamp spring.
5. The fractured formation core protection device according to claim 4, wherein one end of the supporting cylindrical section, which is far away from the supporting threaded section, is provided with a plurality of rectangular grooves along the circumferential direction.
6. The broken formation core protection device as claimed in claim 4, wherein an annular protrusion is arranged on the inner wall of the jump ring seat, and the support thread section abuts against the annular protrusion.
7. The fractured formation core protection device according to claim 4, wherein the core barrel comprises a first cylinder section, a thread installation section and a second cylinder section which are sequentially connected, the outer diameters of the first cylinder section, the thread installation section and the second cylinder section are sequentially increased, and the first cylinder section is arranged at one end close to the support ring.
8. The broken formation core protection device as claimed in claim 7, wherein an annular groove is formed in the inner wall of the clamp spring seat, and the annular groove, the annular side wall of the support cylindrical section and the outer end face of the first cylindrical section enclose the annular cavity.
9. The fractured formation core protection device according to claim 1, wherein the connecting ring is a light alloy ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110425505.2A CN113090211B (en) | 2021-04-20 | 2021-04-20 | Broken stratum rock core protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110425505.2A CN113090211B (en) | 2021-04-20 | 2021-04-20 | Broken stratum rock core protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113090211A true CN113090211A (en) | 2021-07-09 |
| CN113090211B CN113090211B (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110425505.2A Active CN113090211B (en) | 2021-04-20 | 2021-04-20 | Broken stratum rock core protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113090211B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370312A (en) * | 2022-08-24 | 2022-11-22 | 四川大学 | Deep in-situ film-forming quality-guaranteeing coring device while drilling |
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| CN201953332U (en) * | 2010-12-14 | 2011-08-31 | 湖北地矿建设工程承包集团有限公司 | Telescopic overlapped type flexible bag tube core taking inner tube |
| WO2013149599A1 (en) * | 2012-04-05 | 2013-10-10 | 中国科学院武汉岩土力学研究所 | Deep softrock geostress test method and device based on flow stress recovery principle |
| CN205297423U (en) * | 2016-01-28 | 2016-06-08 | 吉林大学 | Inner tube of coring from adaptive type |
| CN205778652U (en) * | 2016-07-05 | 2016-12-07 | 中交第四航务工程勘察设计院有限公司 | A kind of core drill based on hydraulic pressure card coring |
| CN107829691A (en) * | 2017-09-25 | 2018-03-23 | 北京探矿工程研究所 | Core tube with internal coating |
| CN107956443A (en) * | 2017-12-11 | 2018-04-24 | 吉林大学 | Adaptive membrane type shale gas and rock core pressurize sealed sampler |
| CN109060846A (en) * | 2018-08-14 | 2018-12-21 | 贵州大学 | A kind of CT rock core scanning driving device |
-
2021
- 2021-04-20 CN CN202110425505.2A patent/CN113090211B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201953332U (en) * | 2010-12-14 | 2011-08-31 | 湖北地矿建设工程承包集团有限公司 | Telescopic overlapped type flexible bag tube core taking inner tube |
| WO2013149599A1 (en) * | 2012-04-05 | 2013-10-10 | 中国科学院武汉岩土力学研究所 | Deep softrock geostress test method and device based on flow stress recovery principle |
| CN205297423U (en) * | 2016-01-28 | 2016-06-08 | 吉林大学 | Inner tube of coring from adaptive type |
| CN205778652U (en) * | 2016-07-05 | 2016-12-07 | 中交第四航务工程勘察设计院有限公司 | A kind of core drill based on hydraulic pressure card coring |
| CN107829691A (en) * | 2017-09-25 | 2018-03-23 | 北京探矿工程研究所 | Core tube with internal coating |
| CN107956443A (en) * | 2017-12-11 | 2018-04-24 | 吉林大学 | Adaptive membrane type shale gas and rock core pressurize sealed sampler |
| CN109060846A (en) * | 2018-08-14 | 2018-12-21 | 贵州大学 | A kind of CT rock core scanning driving device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370312A (en) * | 2022-08-24 | 2022-11-22 | 四川大学 | Deep in-situ film-forming quality-guaranteeing coring device while drilling |
| CN115370312B (en) * | 2022-08-24 | 2023-07-18 | 四川大学 | Deep in-situ film-forming quality-guaranteeing coring device while drilling |
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| Publication number | Publication date |
|---|---|
| CN113090211B (en) | 2022-11-08 |
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