CN113482563A - Chemical heat-preserving pressure-maintaining coring device - Google Patents
Chemical heat-preserving pressure-maintaining coring device Download PDFInfo
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- CN113482563A CN113482563A CN202110925280.7A CN202110925280A CN113482563A CN 113482563 A CN113482563 A CN 113482563A CN 202110925280 A CN202110925280 A CN 202110925280A CN 113482563 A CN113482563 A CN 113482563A
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- flow passage
- trigger
- valve
- interlayer
- trigger piston
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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
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
Abstract
The invention relates to a chemical heat-preservation pressure-maintaining corer, which comprises a central rod and an outer barrel of a drilling machine, wherein an interlayer is arranged in the barrel wall of the outer barrel of the drilling machine, and a part of reactants are filled in the interlayer and can perform endothermic reaction or exothermic reaction when meeting water; the interlayer is provided with a liquid inlet, a one-way valve is arranged at the liquid inlet of the interlayer, the inlet of the one-way valve is connected with the outlet of the trigger valve, the trigger valve comprises a trigger piston, and when the valve is closed, one end of the trigger piston extends to the outside of the trigger valve; the central rod is provided with a convex part for triggering the trigger piston, when the central rod is lifted upwards to a certain height, the convex part can push the trigger piston to move inwards so as to open the trigger valve, and the liquid in the corer can enter the interlayer through the trigger valve and the one-way valve. The invention can keep the core in low temperature or high temperature environment; the chemical reaction is triggered by the original action of the central rod and the mechanical valve, so that the operation is convenient, and the energy consumption can be reduced.
Description
Technical Field
The invention relates to the technical field of coring devices, in particular to a chemical heat-preservation 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.
Disclosure of Invention
The invention provides a chemical heat-preservation pressure-maintaining coring device for solving the technical problems.
The invention is realized by the following technical scheme:
the chemical heat-preservation pressure-maintaining coring device comprises a central rod and a drilling machine outer cylinder, wherein an interlayer is arranged in the wall of the drilling machine outer cylinder, a part of reactant is filled in the interlayer, and the reactant can perform endothermic reaction or exothermic reaction when meeting water;
the interlayer is provided with a liquid inlet, a one-way valve is arranged at the liquid inlet of the interlayer, the inlet of the one-way valve is connected with the outlet of the trigger valve, the trigger valve comprises a trigger piston, and when the valve is closed, one end of the trigger piston extends to the outside of the trigger valve;
the central rod is provided with a convex part for triggering the trigger piston, and when the central rod is lifted upwards to a certain height, the convex part can push the trigger piston to move inwards so as to open the trigger valve, so that the liquid in the corer can enter the interlayer through the trigger valve and the one-way valve.
Further, the one-way valve is integrally manufactured with the valve body of the trigger valve; the valve body is cylindrical and matched with the outer cylinder of the drilling machine, and is coaxially arranged in an annular groove in the inner wall of the outer cylinder of the drilling machine; the central hole of the valve body forms a main flow passage, at least one sub-flow passage is arranged in the side wall of the valve body, the sub-flow passage comprises a first flow passage and a second flow passage, a one-way valve core is arranged in the second flow passage to form the one-way valve, and the one-way valve core only allows a medium to flow from the first flow passage to the second flow passage;
an inlet of the first flow passage is communicated with a main flow passage of the valve body, an inlet of the second flow passage is communicated with the first flow passage, an outlet of the second flow passage is communicated with the interlayer, and the trigger piston is arranged in the first flow passage to form the trigger valve;
when the trigger piston is positioned at the first position, the trigger piston seals the inlet of the first flow passage and/or seals the inlet of the second flow passage;
when the trigger 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 liquid can flow into the second flow passage through the first flow passage;
when the trigger piston is positioned at the first position, one end of the trigger piston protrudes out of the side wall of the main flow passage; when the center rod is lifted up to a certain height, the protrusion can push the trigger piston to move from the first position to the second position.
Further, the end of the trigger piston has a guide surface.
Further, the trigger piston can move in the radial direction, the first flow channel is a stepped hole, and the small end of the stepped hole is communicated with the main flow channel; the trigger piston is stepped to match the first flow passage.
Furthermore, two sealing rings are arranged between the trigger piston and the first flow channel;
when the trigger piston is located at the first position, the inlet of the second flow passage is located between the two sealing rings;
when the trigger 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.
The outer cylinder of the drilling machine comprises an inner cylinder and an outer cylinder which are coaxial, and an annular space between the inner cylinder and the outer cylinder forms the interlayer.
Furthermore, the upper port of the annulus between the inner cylinder and the outer cylinder is sealed by the combination valve, and the lower port of the annulus is sealed by a sealing device.
Furthermore, a heat insulation layer is arranged on the outer side of the interlayer.
And a sealing ring is arranged between the outer side wall of the valve body and the outer cylinder of the drilling machine.
Preferably, the reactants contained in the interlayer are a mixture of solid barium hydroxide and solid ammonium chloride.
Compared with the prior art, the invention has the following beneficial effects:
chemical reactants are prestored in the wall of the coring device, and a low-temperature or high-temperature environment is realized through chemical reaction; the valve has the advantages of simple structure and ingenious design, the triggering of the chemical reaction is realized by the original lifting action of the central rod, and the operation is convenient.
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 schematic view of the construction of the present invention with the center pole not raised;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A2;
FIG. 4 is an enlarged view of a portion of FIG. 3 at C;
FIG. 5 is an enlarged view of a portion of FIG. 2 at B;
FIG. 6 is a three-dimensional view of the combination valve of the present invention;
FIG. 7 is an end view of the combination valve of the present invention;
FIG. 8 is a cross-sectional view of the combination valve with the trigger piston in the first position;
FIG. 9 is a cross-sectional view of the combination valve with the trigger piston in a second position;
FIG. 10 is a schematic view of the configuration of the present invention 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 chemical heat-preservation and 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. An interlayer 13 is arranged in the wall of the outer cylinder 1 of the drilling machine, and the interlayer 13 is positioned above the pressure retaining valve 5.
The interlayer 13 contains a portion of the reactant 16, and the reactant 16 can react endothermically or exothermically when exposed to 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, and will react endothermically after meeting water.
The interlayer 13 is provided with a liquid inlet, a one-way valve is arranged at the liquid inlet of the interlayer, the inlet of the one-way valve is connected with the outlet of the trigger valve, the trigger valve comprises a trigger piston 24, and when the valve is closed, one end of the trigger piston 24 extends to the outside of the trigger valve.
The central rod 3 is provided with a convex part 31 for triggering the trigger piston 24, when the central rod 3 is lifted upwards to a certain height, the convex part 31 can push the trigger piston 24 to move inwards and then open the trigger valve, so that the liquid in the coring device can enter the interlayer 13 through the trigger valve and the one-way valve, and the reactant 16 and the water have endothermic reaction, thereby achieving the purpose of freezing.
In this embodiment mode, the check valve is integrally manufactured with the valve body of the trigger valve. As shown in fig. 4, 6, 7, 8 and 9, the valve body 21 is in a cylindrical shape matched with the outer cylinder 1 of the drilling machine, and the valve body 21 is coaxially arranged in an annular groove on the inner wall of the outer cylinder 1 of the drilling machine; the central hole of the valve body 21 forms a main flow passage 20, 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 to form a one-way valve, 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, and an outlet of the second flow passage 212 is communicated with the interlayer 13, and the trigger piston 24 is installed in the first flow passage 211 to constitute a trigger valve.
As shown in fig. 4 and 8, when trigger piston 24 is in the first position, trigger piston 24 closes the inlet of first flow passage 211 and/or seals inlet 213 of second flow passage 212;
as shown in fig. 9, 11 and 12, when the trigger piston 24 is located at the second position, the inlet of the first flow passage 211 and the inlet 213 of the second flow passage 212 are both open, and the liquid can flow into the second flow passage 212 through the first flow passage 211;
as shown in fig. 8 and 9, when the trigger piston 24 is in the first position, one end of the trigger piston 24 protrudes out of the side wall of the main flow passage 20; when the center rod 3 is lifted upward to a certain height, the protrusion 31 may push the trigger piston 24 to move from the first position to the second position.
The trigger piston 24 is radially movable in this embodiment. The end of the trigger piston 24 has a guide surface 241 so that the trigger 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 trigger piston 24 is stepped to match the first flow passage 211. To enable the installation of the trigger piston 24, the second flow channel 212 extends radially through the inner and outer walls of the valve body 21, so that the trigger piston 24 can be inserted into the first flow channel 211 from outside the valve body 21. The length of the trigger 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 trigger piston 24 and the first flow passage 211; when the trigger piston 24 is in 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 trigger 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.
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. 6 and 7, 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.
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 which is attached to the wall of the outer cylinder 13. The inner cylinder 12 and the outer cylinder 13 are made of metal.
The upper port of the annulus between the upper end of the inner cylinder 12 and the outer cylinder 13 is sealed by an openable one-way valve, the lower port 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 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 working principle of the invention is explained below with reference to fig. 1 to 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 protrusion 31 on the central rod 3 moves to the trigger piston 24, the trigger piston 24 is forced by the protrusion 31 to move radially outward along the first flow channel 211, and as the central rod 3 continues to be lifted, the trigger piston 24 moves from the first position to the second position, and the liquid inside the corer flows into the second flow channel 212 through the first flow channel 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.
In another embodiment, the one-way valve is a separate component from the body of the trigger valve. The valve body 21 is divided into two parts, one part is used as the valve body of the one-way valve, and the other part is used as the valve body of the trigger valve.
In another embodiment, the reactant 16 is calcium oxide or iron powder. Calcium oxide or iron powder reacts with water exothermically.
Chemical reactants are prestored in the outer cylinder of the drilling machine, and a low-temperature or high-temperature environment is realized through chemical reaction; the triggering of the chemical reaction is realized by the original lifting action of the central rod and a mechanical valve, and no lead is required to be arranged, so that the energy consumption can be reduced; the invention has smart structure, coring is carried out by using the invention, and chemical reaction and the entering of the rock core into the pressure maintaining cabin are almost carried out simultaneously. It is especially suitable for drilling combustible ice.
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. Chemical heat preservation pressurize corer, including well core rod and rig urceolus, its characterized in that: an interlayer is arranged in the wall of the outer barrel of the drilling machine, a part of reactants are filled in the interlayer, and the reactants can perform endothermic reaction or exothermic reaction when meeting water;
the interlayer is provided with a liquid inlet, a one-way valve is arranged at the liquid inlet of the interlayer, the inlet of the one-way valve is connected with the outlet of the trigger valve, the trigger valve comprises a trigger piston, and when the valve is closed, one end of the trigger piston extends to the outside of the trigger valve;
the central rod is provided with a convex part for triggering the trigger piston, and when the central rod is lifted upwards to a certain height, the convex part can push the trigger piston to move inwards so as to open the trigger valve, so that the liquid in the corer can enter the interlayer through the trigger valve and the one-way valve.
2. The chemical heat-preserving dwell coring device of claim 1, wherein: the one-way valve and the valve body of the trigger valve are manufactured integrally; the valve body is cylindrical and matched with the outer cylinder of the drilling machine, and is coaxially arranged in an annular groove in the inner wall of the outer cylinder of the drilling machine; the central hole of the valve body forms a main flow passage, at least one sub-flow passage is arranged in the side wall of the valve body, the sub-flow passage comprises a first flow passage and a second flow passage, a one-way valve core is arranged in the second flow passage to form the one-way valve, and the one-way valve core only allows a medium to flow from the first flow passage to the second flow passage;
an inlet of the first flow passage is communicated with a main flow passage of the valve body, an inlet of the second flow passage is communicated with the first flow passage, an outlet of the second flow passage is communicated with the interlayer, and the trigger piston is arranged in the first flow passage to form the trigger valve;
when the trigger piston is positioned at the first position, the trigger piston seals the inlet of the first flow passage and/or seals the inlet of the second flow passage;
when the trigger 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 liquid can flow into the second flow passage through the first flow passage;
when the trigger piston is positioned at the first position, one end of the trigger piston protrudes out of the side wall of the main flow passage; when the center rod is lifted up to a certain height, the protrusion can push the trigger piston to move from the first position to the second position.
3. The chemical heat-preserving and pressure-maintaining corer as claimed in claim 1 or 2, wherein: the end of the trigger piston has a guide surface.
4. The chemical heat-preserving and pressure-maintaining corer as claimed in claim 2 or 3, wherein: the trigger piston can move in the radial direction, the first flow channel is a stepped hole, and the small end of the stepped hole is communicated with the main flow channel; the trigger piston is stepped to match the first flow passage.
5. The chemical heat-preserving dwell coring device of claim 4, wherein: two sealing rings are arranged between the trigger piston and the first flow channel;
when the trigger piston is located at the first position, the inlet of the second flow passage is located between the two sealing rings;
when the trigger 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.
6. The chemical heat-preserving dwell coring device of claim 1, wherein: the outer cylinder of the drilling machine comprises an inner cylinder and an outer cylinder which are coaxial, and an annular space between the inner cylinder and the outer cylinder forms the interlayer.
7. The chemical heat-preserving dwell coring device of claim 6, wherein: the upper port of the annulus between the inner cylinder and the outer cylinder is sealed by the one-way valve, and the lower port of the annulus is sealed by a sealing device.
8. The chemical heat-preserving dwell coring apparatus of claim 1, 6 or 7, wherein: and a heat-insulating layer is arranged on the outer side of the interlayer.
9. The chemical heat-preserving dwell coring device of claim 2, wherein: and a sealing ring is arranged between the outer side wall of the valve body and the outer cylinder of the drilling machine.
10. The chemical heat-preserving dwell coring device of claim 1, wherein: the reactant in the interlayer is a mixture of solid barium hydroxide and solid ammonium chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925280.7A CN113482563B (en) | 2021-08-12 | 2021-08-12 | Chemical heat-preserving pressure-maintaining coring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925280.7A CN113482563B (en) | 2021-08-12 | 2021-08-12 | Chemical heat-preserving pressure-maintaining coring device |
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| CN113482563A true CN113482563A (en) | 2021-10-08 |
| CN113482563B CN113482563B (en) | 2023-01-24 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071099A (en) * | 1976-07-19 | 1978-01-31 | Sun Oil Company | Method and apparatus for stabilizing borehole cores |
| CN101532922A (en) * | 2008-03-14 | 2009-09-16 | 吉林大学 | Gas hydrate hole-bottom frozen sampler and sampling method thereof |
| US7878269B2 (en) * | 2007-12-21 | 2011-02-01 | Corpro Systems Limited | Monitoring apparatus for core barrel operations |
| CN104499976A (en) * | 2014-12-13 | 2015-04-08 | 吉林大学 | Hole bottom refrigeration wire core-drilling tool for mixed refrigeration of alcohol and liquid nitrogen |
| CN109113612A (en) * | 2018-09-03 | 2019-01-01 | 吉林大学 | Gas hydrates paddle type mill refrigerating and pressure keeping double acting rope Sampling driller and method |
| CN109458147A (en) * | 2018-11-08 | 2019-03-12 | 深圳大学 | Coring device |
-
2021
- 2021-08-12 CN CN202110925280.7A patent/CN113482563B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071099A (en) * | 1976-07-19 | 1978-01-31 | Sun Oil Company | Method and apparatus for stabilizing borehole cores |
| US7878269B2 (en) * | 2007-12-21 | 2011-02-01 | Corpro Systems Limited | Monitoring apparatus for core barrel operations |
| CN101532922A (en) * | 2008-03-14 | 2009-09-16 | 吉林大学 | Gas hydrate hole-bottom frozen sampler and sampling method thereof |
| CN104499976A (en) * | 2014-12-13 | 2015-04-08 | 吉林大学 | Hole bottom refrigeration wire core-drilling tool for mixed refrigeration of alcohol and liquid nitrogen |
| CN109113612A (en) * | 2018-09-03 | 2019-01-01 | 吉林大学 | Gas hydrates paddle type mill refrigerating and pressure keeping double acting rope Sampling driller and method |
| CN109458147A (en) * | 2018-11-08 | 2019-03-12 | 深圳大学 | Coring device |
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| CN113482563B (en) | 2023-01-24 |
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