CN113482564A - 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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- CN113482564A CN113482564A CN202110925279.4A CN202110925279A CN113482564A CN 113482564 A CN113482564 A CN 113482564A CN 202110925279 A CN202110925279 A CN 202110925279A CN 113482564 A CN113482564 A CN 113482564A
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- flow passage
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- 239000003814 drug Substances 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 12
- 239000011229 interlayer Substances 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 229940079593 drug Drugs 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 7
- 239000000376 reactant Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 2
- 229910001863 barium hydroxide Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036983 biotransformation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000126 substance 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
- E21B25/10—Formed core retaining or severing means
-
- 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
- E21B25/18—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being specially adapted for operation under water
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- 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
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)
- Lift Valve (AREA)
Abstract
The invention relates to a combination valve and a pressure-maintaining coring device for a coring device, which comprise a cylindrical valve body, wherein a main flow channel is formed by a central hole of the valve body, 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; 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 utilizes 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 only under 30 atmospheric pressures at 0 ℃, and 30 atmospheric pressures are easy to guarantee in 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 coring device that is relatively mature at present. The mutual cooperation of each part realizes the drilling, snatching and transferring of core to get core fidelity cabin, can accomplish the drilling of core by high stability, high performance, high efficiency and get. However, the core retrieving apparatus disclosed in patent document CN209228327U is not provided with a freezing device, and cannot be used for drilling combustible ice because the drilled core cannot be in a low temperature environment.
The fidelity coring device disclosed in patent document CN210118109U and the natural gas hydrate bottom-of-hole freeze sampler disclosed in patent document CN201327453Y can achieve low temperature maintenance, but liquid nitrogen is used as a refrigerant.
The whole process of coring is divided into: (1) lowering the coring device; (2) drilling combustible ice; (3) the corer is lifted three steps. 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 throughout the 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.
Furthermore, the second 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.
Further, the check 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:
1, the combined valve has simple structure, ingenious design and convenient use; the core taking device 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 fragmentary view taken at A2 in FIG. 6;
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 main 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 on an end surface of one end of the valve body 21, and the piston 24 is arranged in the first flow passage 211.
As shown in FIG. 3, when piston 24 is in the first position, piston 24 closes off the inlet of first fluid passage 211 and/or seals off 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. To enable the piston 24 to be mounted, the second flow passage 212 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 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.
The sandwich 13 is filled with a portion of the reactant 16. If the core is to be maintained in a low temperature environment, the reactant 16 may react endothermically in the presence of water. In this embodiment, the reactant 16 is a mixture of solid barium hydroxide and solid ammonium chloride. The mixture of solid barium hydroxide and solid ammonium chloride will not react chemically when mixed together, and will react when meeting water.
If the core is required to maintain a high temperature environment, the reactant 16 may react exothermically in the presence of water.
The upper end opening of the annular space 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 annular space 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 is contacted with the upper end surface of the inner cylinder 12, and the inner diameter of the valve body 21 is equal to that 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 coring device can enter the interlayer 13 through the first flow passage 211 and the second flow passage 212, and the reactant 16 and water have 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 coring apparatus flows into the second flow passage 212 through the first flow passage 211, flows into the interlayer 13, and reacts endothermically 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 continues to be lifted to the top dead center, the core barrel 4 just moves up to the inner peripheral area of the interlayer 13, and the heat absorption 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 pressure maintaining coring device integrates a combined valve on the outer cylinder of the drilling machine, 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.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, 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. Combination valve for corer, 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 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.
2. The combination valve for a coring apparatus as set forth in claim 1, wherein: the piston is radially movable, and the inner end of the piston has a guide surface so that the piston is moved radially outward relative to the valve body when an external force is applied to the guide surface in the axial direction of the valve body.
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 second 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 check 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.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN113482564A true CN113482564A (en) | 2021-10-08 |
| CN113482564B CN113482564B (en) | 2023-03-10 |
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| CN202110925279.4A Active CN113482564B (en) | 2021-08-12 | 2021-08-12 | Combination valve for coring device and pressure-maintaining coring device |
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| US20200181998A1 (en) * | 2018-12-11 | 2020-06-11 | Guangzhou Marine Geological Survey | Natural gas hydrate rotary pressure-retaining corer |
| 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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2021
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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 |
| 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 |
| US20130199847A1 (en) * | 2012-02-08 | 2013-08-08 | Halliburton Energy Services, Inc. | Instrumented Core Barrel Apparatus and Associated Methods |
| 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 |
| CN109025879A (en) * | 2018-08-13 | 2018-12-18 | 四川大学 | Pressure maintaining cylinder sealing structure |
| US20200181998A1 (en) * | 2018-12-11 | 2020-06-11 | Guangzhou Marine Geological Survey | Natural gas hydrate rotary pressure-retaining corer |
| 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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