CN113482564B - Combination valve for coring device and pressure-maintaining coring device - Google Patents
Combination valve for coring device and pressure-maintaining coring device Download PDFInfo
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- CN113482564B CN113482564B CN202110925279.4A CN202110925279A CN113482564B CN 113482564 B CN113482564 B CN 113482564B CN 202110925279 A CN202110925279 A CN 202110925279A CN 113482564 B CN113482564 B CN 113482564B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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, core extractors
- E21B25/10—Formed core retaining or severing means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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, core extractors
- E21B25/18—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being specially adapted for operation under water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- 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)
- Lift Valve (AREA)
Abstract
The invention relates to a combined valve and a pressure-maintaining coring device for a coring device, which comprise a cylindrical valve body, wherein a main runner is formed by a central hole of the valve body, at least one sub-runner is arranged in the side wall of the valve body, the sub-runner comprises a first runner and a second runner, a one-way valve core is arranged in the second runner, and the one-way valve core only allows a medium to flow from the first runner to the second runner; an inlet of the first flow channel is communicated with a main flow channel of the valve body, an inlet of the second flow channel is communicated with the first flow channel, an outlet of the second flow channel is positioned on the end face of one end of the valve body, and a piston is arranged in the first flow channel; the piston is movable between open and closed states. The combined valve has the advantages of simple structure, ingenious design and convenient use; the pressure-maintaining coring device is integrated with a combined valve, and when the core is lifted, the central rod triggers the valve to enable water to enter an interlayer with medicines, so that the triggering of chemical reaction is realized; the invention uses the original lifting action of the center rod to trigger the reaction, and is simple and convenient to use.
Description
Technical Field
The invention relates to the technical field of coring devices, in particular to a combination valve for a coring device and a pressure-maintaining coring device.
Background
The natural gas hydrate is an ice-like crystalline substance which is distributed in deep sea sediments or permafrost in land areas and is formed by natural gas and water under high pressure and low temperature conditions. There are three basic conditions for forming combustible ice: temperature, pressure and raw materials. Firstly, low temperature: combustible ice is formed at 0-10 ℃ and decomposes at temperatures above 20 ℃. The seabed temperature is generally kept at about 2-4 ℃;
secondly, high pressure: the combustible ice can be generated under 30 atmospheric pressures at 0 ℃, and 30 atmospheric pressures are easy to guarantee at the depth of the ocean, and the hydrate is difficult to decompose when the atmospheric pressure is higher.
Finally, adequate gas supply: the organic matter on the seabed is precipitated, and the abundant carbon in the organic matter is subjected to biotransformation, so that a sufficient gas source can be generated. The stratum of the seabed is a porous medium, and under the conditions of temperature, pressure and gas source, combustible ice crystals can be generated in the gaps of the medium.
Patent document CN209228327U discloses a core taking device, which is also a pressure-maintaining core taking device that is relatively mature at present. The drill core is drilled, grabbed and transferred to the core-taking fidelity cabin through the mutual cooperation of all the parts, and the drill core can be efficiently completed with high stability and high performance. However, the core-removing device disclosed in patent document CN209228327U is not provided with a freezing device, and cannot make the drilled core in a low-temperature environment, and cannot be used for drilling combustible ice.
Although the fidelity coring device disclosed in patent document CN210118109U and the gas hydrate bottom-of-hole freeze sampler disclosed in patent document CN201327453Y can maintain a low temperature, liquid nitrogen is used as the refrigerant.
The whole process of coring is divided into: (1) lowering a corer; (2) drilling combustible ice; and (3) lifting the coring device. Whereas the ambient temperature change of the combustible ice only occurs in the third step (corer lift). The use of liquid nitrogen as the cryogen, with a freezing period for the entire coring process, may occur where the temperature of the liquid nitrogen rises before proceeding to the third step.
Disclosure of Invention
The invention provides a combination valve for a coring device and a pressure maintaining coring device for solving the technical problems.
The invention is realized by the following technical scheme:
the combined valve for the coring device comprises a cylindrical valve body, wherein a central hole of the valve body forms a main flow channel, at least one sub-flow channel is arranged in the side wall of the valve body, the sub-flow channel comprises a first flow channel and a second flow channel, a one-way valve core is arranged in the second flow channel, and the one-way valve core only allows a medium to flow from the first flow channel to the second flow channel;
an inlet of the first flow channel is communicated with a main flow channel of the valve body, an inlet of the second flow channel is communicated with the first flow channel, an outlet of the second flow channel is positioned on the end face of one end of the valve body, and a piston is arranged in the first flow channel;
when the piston is positioned at the first position, the piston seals the inlet of the first flow passage and/or seals the inlet of the second flow passage;
when the piston is located at the second position, the inlet of the first flow passage and the inlet of the second flow passage are both opened, and the medium can flow into the second flow passage through the first flow passage;
when the piston is at the first position, one end of the piston protrudes out of the side wall of the main flow passage, and the piston can be moved from the first position to the second position by moving the piston outwards relative to the valve body.
Further, the piston is radially movable, and an inner end of the piston has a guide surface so that the piston is radially outwardly movable relative to the valve body when an external force is applied to the guide surface in the axial direction of the valve body.
Furthermore, at least two sub-runners are arranged in the side wall of the valve body.
Preferably, four branch channels are arranged in the side wall of the valve body.
Further preferably, the branch passages are arranged at equal intervals in the circumferential direction of the valve body.
Further, the first flow passage radially penetrates through the inner side wall and the outer side wall of the valve body, and the length of the piston is not larger than the wall thickness of the valve body.
The first flow channel is a stepped hole, and the small end of the stepped hole is communicated with the main flow channel; the piston is stepped to match the first flow passage.
Furthermore, two sealing rings are arranged between the piston and the first flow channel;
when the piston is positioned at the first position, the inlet of the second flow passage is positioned between the two sealing rings;
when the piston is located at the second position, the two sealing rings are located on the outer side of the inlet of the second flow passage.
Furthermore, the one-way valve core comprises a ball body and an axial spring, and the ball body blocks the inlet of the second flow passage under the action of the spring.
Furthermore, a control valve is installed at an outlet of the second flow channel, a flow channel control hole is formed in the control valve, and the control valve is detachably connected with the valve body.
Wherein, the lateral wall of valve body installs the sealing washer.
The pressure maintaining coring device comprises a drilling machine outer cylinder, a central rod and a combined valve for the coring device, wherein a medicine cabin is arranged in the wall of the drilling machine outer cylinder; the valve body is coaxially arranged on the inner wall of the outer cylinder of the drilling machine, and the outlet of the second flow channel is communicated with the medicine cabin;
the central rod is provided with a convex part for triggering the piston, and when the central rod is lifted upwards to a certain height, the convex part can push the piston to move from the first position to the second position.
Compared with the prior art, the invention has the following beneficial effects:
the combined valve has the advantages of simple structure, ingenious design and convenient use; the core extractor using the combination valve can more conveniently control the heat preservation time period;
2, the pressure-maintaining coring device is integrated with a combined valve, and when the core is lifted, the central rod triggers the valve to enable water to enter an interlayer with medicines, so that the triggering of chemical reaction is realized; the invention utilizes the original lifting action of the center rod to trigger the reaction, and is simple and convenient to use.
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 embodiment(s) of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a three-dimensional view of a combination valve of the present invention;
FIG. 2 is an end view of the combination valve of the present invention;
FIG. 3 is a cross-sectional view of the combination valve with the piston in a first position;
FIG. 4 is a cross-sectional view of the combination valve with the piston in a second position;
FIG. 5 is a schematic diagram of the configuration of the dwell corer with the center rod not raised;
FIG. 6 is an enlarged view of a portion of FIG. 5 at A1;
FIG. 7 is an enlarged view of a portion of FIG. 6 at A2;
FIG. 8 is an enlarged view of a portion of FIG. 7 at C;
fig. 9 is a partial enlarged view at B in fig. 6;
FIG. 10 is a schematic view of the configuration of the dwell corer with the center rod raised to top dead center;
FIG. 11 is an enlarged view of a portion of FIG. 10 at A3;
fig. 12 is a partial enlarged view at C1 in fig. 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
As shown in fig. 1, 2, 3 and 4, the combination valve for the coring device disclosed by the invention comprises a cylindrical valve body 21, wherein a main flow passage 20 is formed by a central hole of the valve body 21, at least one branch flow passage is arranged in the side wall of the valve body 21, the branch flow passage comprises a first flow passage 211 and a second flow passage 212, a one-way valve core is arranged in the second flow passage 212, and the one-way valve core only allows a medium to flow from the first flow passage 211 to the second flow passage 212;
an inlet of the first flow passage 211 is communicated with the primary flow passage 20 of the valve body 21, an inlet 213 of the second flow passage 212 is communicated with the first flow passage 211, an outlet of the second flow passage 212 is positioned at an end surface of one end of the valve body 21, and the piston 24 is installed in the first flow passage 211.
As shown in fig. 3, when piston 24 is in the first position, piston 24 closes the inlet of first fluid passage 211 and/or seals inlet 213 of second fluid passage 212.
When piston 24 is in the second position, as shown in fig. 4, the inlet of first flow passage 211 and the inlet 213 of second flow passage 212 are both open, and medium can flow into second flow passage 212 through first flow passage 211.
As shown in fig. 3 and 4, when the piston 24 is in the first position, one end of the piston 24 protrudes out of the side wall of the main flow passage 20, and the piston 24 can be moved from the first position to the second position by moving the piston 24 outward relative to the valve body 21.
In this embodiment the piston 24 is radially movable. The inner end of the piston 24 has a guide surface 241 so that the piston 24 can be moved radially outward when an external force is applied to the guide surface 241 in the axial direction of the valve body 21.
In the present embodiment, the first flow channel 211 is a stepped hole, and the small end of the stepped hole is communicated with the main flow channel 20; the piston 24 is stepped to match the first flow passage 211. In order to enable the piston 24 to be mounted, the first flow passage 211 radially penetrates the inner and outer side walls of the valve body 21, so that the piston 24 can be fitted into the first flow passage 211 from the outside of the valve body 21. The length of the piston 24 is preferably not greater than the wall thickness of the valve body 21.
Two sealing rings 22 are arranged between the large end of the piston 24 and the first flow passage 211;
when the piston 24 is located at the first position, the inlet 213 of the second flow passage 212 is located between the two sealing rings 22, so that liquid cannot enter the second flow passage 212 from the first flow passage 211; when the piston 24 is in the second position, the two sealing rings 22 are located outside the inlet 213 of the second flow passage 212, so that liquid can enter the second flow passage 212 from the inner end of the first flow passage 211.
The one-way valve core in the present embodiment includes a ball 23 and an axial spring 25, and the ball 23 blocks the inlet 213 of the second flow passage 212 under the action of the spring 25.
The control valve 26 is installed at the outlet of the second flow passage 212, a flow passage control hole 261 is formed in the control valve 26, and the control valve 26 is detachably connected to the valve body 21. The flow passage control hole 261 is sized as needed. In practice, control valves 26 of various specifications can be manufactured, and the flow passage control holes 261 of the control valves 26 of different specifications have different sizes. When the flow rate needs to be changed, only the control valve 26 with the corresponding specification needs to be replaced.
A seal ring 22 is attached to the outer side wall of the valve body 21.
The number of the sub-runners is set according to the requirement, and at least two sub-runners are preferably arranged in the side wall of the valve body 21.
As shown in fig. 1 and 2, four branch passages are provided in the side wall of the valve body 21 in the present embodiment. The four branch passages are arranged at equal intervals in the circumferential direction of the valve body 21.
As shown in fig. 5-12, the pressure maintaining coring device disclosed by the invention comprises a central rod 3, a drilling machine outer cylinder 1 and a core cylinder 4, wherein a pressure maintaining valve 5 is arranged at the lower part of the drilling machine outer cylinder 1.
The outer cylinder 1 of the drilling machine comprises an inner cylinder 12 and an outer cylinder 13 which are coaxial, and an annular space between the inner cylinder 12 and the outer cylinder 13 forms an interlayer 13. The outer side of the interlayer 13 is provided with a heat insulation layer 14, and the heat insulation layer 14 is attached to the wall of the outer cylinder 13. The inner cylinder 12 and the outer cylinder 13 are made of metal.
If the core is to be maintained in a high temperature environment, the reactants 16 may react exothermically upon contact with water.
The upper end opening of the annulus between the upper end of the inner cylinder 12 and the outer cylinder 13 is sealed by a valve body 21, the lower end opening of the annulus is sealed by a sealing device 15, and then an interlayer 13 for containing reactants is formed between the inner cylinder 12 and the outer cylinder 13.
The upper end of the outer cylinder 13 exceeds the upper end of the inner cylinder 12, a valve body 21 of the combination valve 2 is arranged in the outer cylinder 13, and a sealing ring 22 is arranged between the outer side wall of the valve body 21 and the inner side wall of the outer cylinder 13. The lower end of the valve body 21 contacts with the upper end surface of the inner cylinder 12, and the inner diameter of the valve body 21 is equal to the inner diameter of the inner cylinder 12.
The central rod 3 is provided with a convex part 31 for triggering the piston 24, when the central rod 3 is lifted upwards to a certain height, the convex part 31 can push the piston 24 to move inwards, and then the piston 24 moves from the first position to the second position, so that the liquid in the corer can enter the interlayer 13 through the first flow passage 211 and the second flow passage 212, and the reactant 16 and water can perform an endothermic reaction, thereby achieving the purpose of freezing.
The working principle of the dwell coring apparatus of the present invention is described below with reference to fig. 1-12:
along with the drilling of the core bit, the core enters the core barrel 4, after the drilling is stopped, the central rod 3 is lifted upwards, and the core barrel 4 and the core are driven by the central rod 3 to move upwards together; this is conventional in the art and will not be described in detail herein;
when the boss 31 on the central rod 3 moves to the position of the piston 24, the piston 24 is acted by the boss 31 to move radially outward along the first flow passage 211, and as the central rod 3 is further lifted, the piston 24 moves from the first position to the second position, and the liquid inside the corer flows into the second flow passage 212 through the first flow passage 211 and flows into the interlayer 13 to perform an endothermic reaction with the reactant 16 in the interlayer 13.
When the central rod 3 is lifted to a certain height, the pressure retaining valve 5 is automatically closed to realize pressure retaining coring; this is conventional in the art and will not be described further herein.
When the central rod 3 is continuously lifted to the top dead center, the core barrel 4 just moves up to the inner peripheral area of the interlayer 13, and the endothermic reaction in the interlayer 13 just can perform freezing treatment on the core in the core barrel 4, so that the core is in a low-temperature environment.
The combined valve is integrated on the outer cylinder of the drilling machine, and the central rod triggers the valve when lifting the core, so that water enters the interlayer with the medicine, and the triggering of chemical reaction is realized; the invention uses the original lifting action of the center rod to trigger the reaction, and is simple and convenient to use.
The above embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, 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. The coring uses the combination valve, its characterized in that: the valve comprises a cylindrical valve body, wherein a central hole of the valve body forms a main flow channel, at least one sub-flow channel is arranged in the side wall of the valve body, the sub-flow channel comprises a first flow channel and a second flow channel, a one-way valve core is arranged in the second flow channel, and the one-way valve core only allows a medium to flow from the first flow channel to the second flow channel;
an inlet of the first flow channel is communicated with a main flow channel of the valve body, an inlet of the second flow channel is communicated with the first flow channel, an outlet of the second flow channel is positioned on the end face of one end of the valve body, and a piston is arranged in the first flow channel;
when the piston is positioned at the first position, the piston seals the inlet of the first flow passage and/or seals the inlet of the second flow passage;
when the piston is positioned at the second position, the inlet of the first flow passage and the inlet of the second flow passage are both opened, and the medium can flow into the second flow passage through the first flow passage;
when the piston is at the first position, the inner end of the piston protrudes out of the side wall of the main flow passage, and the inner end of the piston is provided with a guide surface, so that when external force is applied to the guide surface along the axial direction of the valve body, the piston can be moved from the first position to the second position.
2. The combination valve for a coring apparatus as set forth in claim 1, wherein: the piston is radially movable.
3. The combination valve for a coring apparatus as set forth in claim 1, wherein: at least two sub-runners are arranged in the side wall of the valve body.
4. The combination valve for a coring apparatus as set forth in claim 3, wherein: the sub-runners are arranged at equal intervals along the circumferential direction of the valve body.
5. The combination valve for a coring apparatus as set forth in claim 1, wherein: the first flow passage radially penetrates through the inner side wall and the outer side wall of the valve body, and the length of the piston is not larger than the wall thickness of the valve body.
6. The combination valve for a coring apparatus as set forth in claim 1 or 5, wherein: the first flow channel is a stepped hole, and the small end of the stepped hole is communicated with the main flow channel; the piston is stepped to match the first flow passage.
7. The combination valve for a coring apparatus as set forth in claim 6, wherein: two sealing rings are arranged between the piston and the first flow channel;
when the piston is positioned at the first position, the inlet of the second flow passage is positioned between the two sealing rings;
when the piston is located at the second position, the two sealing rings are located on the outer side of the inlet of the second flow passage.
8. The combination valve for a coring apparatus as set forth in claim 1, wherein: the one-way valve core comprises a ball body and an axial spring, and the ball body blocks the inlet of the second flow passage under the action of the spring.
9. The combination valve for a coring apparatus as set forth in claim 1, wherein: and a control valve is installed at the outlet of the second flow passage, a flow passage control hole is formed in the control valve, and the control valve is detachably connected with the valve body.
10. Pressure-holding corer comprising a combination valve for a corer according to any one of claims 1 to 9, characterized in that: the drilling machine further comprises a drilling machine outer cylinder and a center rod, wherein a medicine cabin is arranged in the wall of the drilling machine outer cylinder; the valve body is coaxially arranged on the inner wall of the outer cylinder of the drilling machine, and the outlet of the second flow channel is communicated with the medicine cabin;
the central rod is provided with a convex part for triggering the piston, and when the central rod is lifted upwards to a certain height, the convex part can push the piston to move from the first position to the second position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925279.4A CN113482564B (en) | 2021-08-12 | 2021-08-12 | Combination valve for coring device and pressure-maintaining coring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925279.4A CN113482564B (en) | 2021-08-12 | 2021-08-12 | Combination valve for coring device and pressure-maintaining coring device |
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| CN113482564A CN113482564A (en) | 2021-10-08 |
| CN113482564B true CN113482564B (en) | 2023-03-10 |
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| CN2112004U (en) * | 1992-03-09 | 1992-08-05 | 石油大学(华东) | Oil well blow-out preventer |
| CN2599224Y (en) * | 2003-02-17 | 2004-01-14 | 杨家凤 | Ring type flow process wellhead combined valve |
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| CN207073404U (en) * | 2017-05-27 | 2018-03-06 | 中国石油化工股份有限公司 | Oil well mark produces switch valve |
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| CN109025879A (en) * | 2018-08-13 | 2018-12-18 | 四川大学 | Pressure maintaining cylinder sealing structure |
| CN212508227U (en) * | 2021-01-13 | 2021-02-09 | 东营市蕴东石油科技有限公司 | Open hole horizontal well subsection gravel packing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9103176B2 (en) * | 2012-02-08 | 2015-08-11 | Halliburton Energy Services, Inc. | Instrumented core barrel apparatus and associated methods |
| CN109653696B (en) * | 2018-12-11 | 2023-09-22 | 广州海洋地质调查局 | Natural gas hydrate rotary pressure-maintaining coring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2112004U (en) * | 1992-03-09 | 1992-08-05 | 石油大学(华东) | Oil well blow-out preventer |
| CN2599224Y (en) * | 2003-02-17 | 2004-01-14 | 杨家凤 | Ring type flow process wellhead combined valve |
| CN101514614A (en) * | 2009-04-02 | 2009-08-26 | 吉林大学 | Dry ice sublimation hole bottom refrigerating and pressure keeping sampler and sampling method |
| CN207073404U (en) * | 2017-05-27 | 2018-03-06 | 中国石油化工股份有限公司 | Oil well mark produces switch valve |
| CN108999583A (en) * | 2018-08-13 | 2018-12-14 | 四川大学 | Pressure maintaining cylinder top seal structure with explosion prevention function |
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