CN113738306A - Underground phase-change temperature adjusting method and device - Google Patents
Underground phase-change temperature adjusting method and device Download PDFInfo
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- CN113738306A CN113738306A CN202111028129.XA CN202111028129A CN113738306A CN 113738306 A CN113738306 A CN 113738306A CN 202111028129 A CN202111028129 A CN 202111028129A CN 113738306 A CN113738306 A CN 113738306A
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- phase change
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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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
Abstract
The invention discloses a method and a device for adjusting temperature through underground phase change, which relate to the technical field of underground operation, and the device comprises the following components: the device comprises a refrigerating end, a heat dissipation end, a circulating mechanism and a phase change control mechanism; the refrigerating end, the heat dissipation end and the phase change control generation mechanism are all communicated with the circulation mechanism; the circulation mechanism contains a phase change medium; the control phase change generation mechanism is used for controlling the phase change medium to generate heat absorption phase change at the refrigeration end; and the phase change control module is also used for controlling the phase change medium subjected to heat absorption phase change to perform heat dissipation phase change at the heat dissipation end. The invention can absorb heat to realize temperature reduction by utilizing heat absorption phase change, and can release heat to realize temperature rise by utilizing heat release phase change, thereby realizing heat transfer and temperature control. The temperature control device is suitable for controlling the temperature of the working environment of underground instrument equipment, so that the instrument equipment can work normally, stably and reliably underground.
Description
Technical Field
The invention relates to the technical field of underground operation, in particular to an underground phase-change temperature adjusting method and device.
Background
In the technical field of downhole operation, when underground resources are explored, developed and utilized, drilling is needed first, then, instruments and equipment are put into a downhole for measurement, instruments and equipment are put into the downhole for operation, and the like. At this time, the high temperature environment in the well becomes a great obstacle to the operation in the well. Because the temperature in the wellbore will gradually increase as the depth of the drilled well increases. For example, the temperature gradient in some regions is 30 ℃ per 1000 m, i.e. the temperature rises by 30 ℃ for every 1000 m increase. When the ground temperature is 20 ℃, the temperature of a 6000-meter deep well can reach 200 ℃. If a special area, a special stratum, an adjacent well operation and the like are met, the temperature of the well is higher and more irregular. For example, the temperature of the well is higher when the adjacent well is injected with high-temperature steam for oil displacement, and the temperature of some wells can reach more than 230 ℃ or higher. In addition, as the time of the measurement operation of the instrument equipment in the downhole increases, the self power consumption of the instrument equipment increases based on the ambient temperature of the instrument equipment, for example, the ambient temperature is 170 degrees centigrade, and the ambient temperature may reach more than 180 degrees centigrade or higher as the self power consumption of the instrument equipment increases with time.
In the prior art, due to the limitations of modern electronic technology level and sensor working temperature, requirements of a measuring method on a working temperature range and the like, the instrument equipment is required to work normally or well underground, the requirements on the working environment temperature and the temperature range of the instrument equipment are met, the effect of the underground instrument equipment is greatly influenced by the underground high-temperature working environment in the prior art, and therefore how to enable the underground instrument equipment to work efficiently in the underground high-temperature environment is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
The invention provides a method and a device for adjusting temperature through underground phase change, which solve the technical problems.
The invention provides an underground phase-change temperature regulating device, which comprises: the device comprises a refrigerating end, a heat dissipation end, a circulating mechanism and a phase change control mechanism;
the refrigerating end, the heat dissipation end and the phase change control generation mechanism are all communicated with the circulation mechanism; the circulation mechanism contains a phase change medium;
the control phase change generation mechanism is used for controlling the phase change medium to generate heat absorption phase change at the refrigeration end; and the phase change control module is also used for controlling the phase change medium subjected to heat absorption phase change to perform heat dissipation phase change at the heat dissipation end.
Optionally, the mechanism for controlling phase change generation comprises: a phase change generating mechanism and a control mechanism;
the control mechanism is used for controlling the phase change generating mechanism to act on the phase change medium so that the phase change medium generates heat absorption phase change at the refrigerating end; and the phase change generating mechanism is also used for controlling the phase change generating mechanism to act on the phase change medium after the heat absorption phase change occurs, so that the phase change medium generates heat dissipation phase change at the heat dissipation end.
Optionally, the method further comprises: a monitoring component; the monitoring assembly is arranged on the circulating mechanism.
Optionally, the monitoring assembly comprises a sensor and a valve.
Optionally, the circulation mechanism is a circulation pipeline which connects the cooling end, the heat dissipation end and the phase change control generation mechanism to each other;
the refrigeration end includes: a tubular housing, an internal conduit, and an end cap; the internal pipeline is communicated with the circulating mechanism; the tubular housing is disposed outside the internal conduit; the end cap is used for closing the tubular shell;
the heat dissipation end comprises a plurality of continuous cavity spaces formed by pipelines;
the phase change generating mechanism includes: phase change generator, driving motor and control circuit.
Optionally, the phase change generator is configured to act on the phase change medium to cause the phase change medium to undergo an endothermic phase change at the refrigeration end; and the phase change material is also used for acting on the phase change medium after the heat absorption phase change, so that the phase change medium generates heat dissipation phase change at the heat dissipation end.
Optionally, the downhole phase change temperature regulating device is arranged on downhole instrument equipment.
Optionally, the downhole phase change attemperating device is disposed within the drilling sub;
the circulation mechanism, the refrigerating end, the heat dissipation end, the circulation mechanism and the phase change control generation mechanism are all arranged in the drilling pup joint shell;
the refrigerating end is adjacent to the front end of a water hole of the drilling nipple;
the heat dissipation end is adjacent to the rear end of the water hole of the drilling nipple.
The invention also provides an underground phase-change temperature regulating method, which is suitable for the underground phase-change temperature regulating device and comprises the following steps:
step A1, the phase change generating mechanism is controlled to push the phase change medium to enter a refrigerating end; controlling the phase change medium to absorb heat and change phase at the refrigerating end;
step A2: the phase change control mechanism controls the phase change medium which has absorbed heat and changed phase to enter the heat dissipation end, and controls the phase change medium to have heat dissipation and phase change at the heat dissipation end.
The invention also provides an underground phase change temperature regulating method, which comprises the following steps: the phase change of the phase change medium is controlled to realize the heat transfer, and the temperature adjustment of underground equipment is realized.
The invention has the beneficial effects that: the method and the device for adjusting the temperature through the underground phase change can absorb heat to realize temperature reduction by utilizing heat absorption phase change, can release the heat to realize temperature rise by utilizing heat release phase change, thereby realizing heat transfer and temperature control, and can be suitable for controlling the temperature of the working environment of underground instrument equipment to ensure that the instrument equipment can normally, stably and reliably work underground.
Drawings
Fig. 1 is a schematic structural diagram of a downhole phase-change temperature adjusting device according to embodiment 1 of the present invention;
fig. 2 is a structural diagram of a downhole phase-change temperature regulating device according to embodiment 2 of the present invention.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all 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.
Example 1
The present embodiment provides a phase transition attemperator in pit, as shown in fig. 1, including: the device comprises a refrigerating end, a heat dissipation end, a circulating mechanism and a phase change control mechanism;
the refrigerating end, the heat dissipation end and the phase change control generating mechanism are communicated with the circulating mechanism; the circulation mechanism contains a phase change medium;
the control phase change generation mechanism is used for controlling the phase change medium to generate heat absorption phase change at the refrigerating end; and the phase change control module is also used for controlling the phase change medium subjected to heat absorption phase change to perform heat dissipation phase change at the heat dissipation end.
Preferably, the means for controlling the phase change comprises: a phase change generating mechanism and a control mechanism;
the control mechanism is used for controlling the phase change generation mechanism to act on the phase change medium so that the phase change medium absorbs heat and changes phase at the refrigerating end; and the phase change generating mechanism is also used for controlling the phase change generating mechanism to act on the phase change medium after the heat absorption phase change occurs, so that the phase change medium generates heat dissipation phase change at the heat dissipation end.
Preferably, the phase change temperature adjusting device in the well provided by the embodiment may further include: a monitoring component; the monitoring assembly is arranged on the circulating mechanism.
Specifically, the monitoring assembly includes a sensor and a valve.
Preferably, the circulating mechanism is a circulating pipeline which connects the refrigerating end, the heat dissipation end and the phase change control generating mechanism;
the refrigeration end includes: a tubular housing, an internal conduit, and an end cap; the internal pipeline is communicated with the circulating mechanism; the tubular shell is arranged outside the internal pipeline; the end cover is used for closing the tubular shell;
the heat dissipation end comprises a plurality of continuous cavity spaces formed by pipelines;
the phase change generating mechanism includes: phase change generator, driving motor and control circuit.
Preferably, the phase change generator is used for acting on the phase change medium to enable the phase change medium to generate endothermic phase change at the refrigerating end; and the phase change material is also used for acting on the phase change medium after the heat absorption phase change, so that the phase change medium generates heat dissipation phase change at the heat dissipation end.
Preferably, the downhole phase change temperature regulating device is arranged on downhole instrument equipment.
Preferably, the underground phase-change temperature regulating device is arranged in the drilling nipple;
the circulation mechanism, the refrigerating end, the heat dissipation end, the circulation mechanism and the phase change control generation mechanism are all arranged inside the drilling pup joint shell;
the refrigerating end is adjacent to the front end of a water hole of the drilling nipple;
the heat dissipation end is adjacent to the rear end of the water hole of the drilling nipple.
The embodiment also provides an underground phase-change temperature regulating method, which is suitable for an underground phase-change temperature regulating device and comprises the following steps:
step A1, controlling a phase change generating mechanism to push a phase change medium to enter a refrigerating end; controlling the phase change medium to have heat absorption phase change at the refrigerating end;
step A2: the phase change generation mechanism is controlled to control the phase change medium after heat absorption phase change to enter the heat dissipation end, and the phase change medium is controlled to perform heat dissipation phase change at the heat dissipation end.
The embodiment also provides a downhole phase change temperature adjusting method, which comprises the following steps: the phase change of the phase change medium is controlled to realize the heat transfer, thereby realizing the temperature adjustment of the underground equipment.
In this embodiment, the phase change medium undergoes a phase change, specifically, heat transfer of heat absorption or heat release is realized by the change of the state (gas, liquid, and solid) of the phase change medium. For example, when the phase change medium changes from a liquid to a gas, heat absorption is required, and an endothermic phase change occurs. When the phase change medium changes from a gaseous state to a liquid state, heat is released, and an exothermic phase change occurs.
According to the underground phase-change temperature adjusting method and device provided by the embodiment, the phase-change medium is controlled to have heat absorption phase change at the refrigerating end; the phase change medium after the heat absorption phase change is controlled to perform heat dissipation phase change at the heat dissipation end, and the heat transfer is realized by means of the phase change medium, so that the temperature adjustment of the underground equipment is realized.
Example 2
This embodiment provides a phase transition attemperator in pit, as shown in fig. 2, set up in one section well drilling nipple joint, include: the device comprises a refrigerating end 3, a heat dissipation end 4, a circulating mechanism, a monitoring assembly 1 and a phase change control mechanism; the circulating mechanism is specifically as follows: the circulation line 2, the mechanism for controlling the phase change generation includes: a phase change generating mechanism 5 and a control mechanism 6.
The monitoring assembly 1 comprises a series of sensors and valves, including in particular but not exclusively: temperature sensor, pressure sensor, density sensor, flow rate sensor, throttle valve, isobaric valve.
The sensors and valves of the monitoring assembly 1 are arranged on the casing of the drilling nipple and are connected with the circulating pipeline 2. The monitoring component 1 is used for detecting the state of the phase change medium, and mainly for determining the degree of the phase change medium, the control mechanism 6 controls the phase change generating mechanism 5 to perform corresponding adjustment according to the detection result of the sensor in the monitoring component 1, so as to ensure that the phase change occurs at the cooling end 3 and the heat dissipation end 4.
The circulation line 2 is a closed, end-to-end pipe path. The device is a special pipeline for connecting the monitoring component 1, the circulating pipeline 2, the refrigerating end 3, the heat dissipation end 4 and the phase change generating mechanism 5.
The circulation line 2 is a pipe for accommodating the phase change medium and circulating the phase change medium.
The circulation line 2 is a pipe arranged inside the drill sub housing. The shape, length and thickness of the drilling pipe nipple are matched with the system where the drilling pipe nipple is located.
The refrigerating end 3 is a sealed tubular structure with a heat insulating outer shell connected with the circulating pipeline 2. Is a mechanism for reducing temperature and protecting internal elements.
The refrigerating end 3 comprises three parts of a tubular shell, an internal pipeline and an end cover.
The tubular shell is a long tubular structure with heat insulating layers. The main function of the tubular housing is to prevent the higher temperatures of the exterior from entering the interior of the tubular housing, while also preventing the lower temperatures of the interior from escaping to the exterior. The tubular housing can withstand higher pressures, protecting the internal components.
The inner piping of the refrigerating end 3 is connected to the circulation line 2. The main structure for heat exchange.
The internal conduit is an elongated closed tubular structure. The internal pipeline is used for containing the phase change medium and is a main place where the phase change medium undergoes endothermic phase change.
The end cap is a cover for closing the tubular housing of the refrigerating end 3. A cover that is circular and sized to fit the tubular housing. The end cover has the functions of heat preservation and insulation and protecting internal elements.
The heat dissipation end 4 is the main part of the phase change medium in exothermic phase change. Is a continuous cavity space formed by long-length pipelines. The cavity space is in a lower temperature area in the whole drilling nipple. The region of the drilling sub near the rear end of the port 7 is typically cooler throughout the sub.
The heat radiation end 4 is connected with the phase change generating mechanism 5 and the refrigeration end 3 through a circulating pipeline.
The heat dissipation end 4 is the main part of the phase change medium which generates heat and changes phase. The phase change medium in the heat dissipation end 4 generates heat release phase change under the action of the phase change generation mechanism 5. When the heat release phase change occurs, the phase change medium releases a large amount of heat, so that the temperature of the heat dissipation end 4 is increased.
The phase change generating mechanism 5 is the main mechanism for forcing the phase change medium to generate phase change in this patent.
Under the action of the phase change generating mechanism 5, the phase change medium absorbs heat and changes phase at the refrigerating end 3 to absorb heat. The phase change medium generates heat release phase change at the heat dissipation end 4 to release heat.
The phase change generation mechanism 5 includes: the phase change device comprises a phase change generator, a driving motor and a control circuit.
The main function of the control means 6 is to determine the state of the phase change medium from the data detected by the monitoring assembly 1. According to the state of the phase change medium, the phase change generating mechanism 5 is controlled to act on the phase change medium to enable the phase change medium to generate heat absorption phase change at the refrigerating end 3; and the phase change generating mechanism 5 is also used for controlling the phase change generating mechanism to act on the phase change medium after the heat absorption phase change occurs, so that the phase change medium generates heat dissipation phase change at the heat dissipation end 4.
The phase change generator is of a cylinder structure and can change the pressure of a phase change medium.
The phase change generating mechanism 5 can realize constant temperature compression and isothermal compression by changing the pressure of the phase change medium, so that the phase change medium is subjected to phase change. In this embodiment, the function of the phase change generating mechanism 5 includes, but is not limited to, the phase change by changing the pressure of the medium. The above function of the phase change generating mechanism 5 is only one illustration for describing the method of the present patent, and is not a term for limiting the present patent. Nor is it the only description of the process of this patent. For example, the phase change generating means 5 may change the phase of the phase change medium in a specific region by a physical method such as temperature and energization, or a chemical method such as addition of a chemical agent.
The working method of the underground phase-change temperature regulating device provided by the embodiment comprises the following steps:
in the first step, the control mechanism 6 controls the phase change generating mechanism 5 to act on the phase change medium, so that the phase change medium is subjected to heat absorption phase change at the refrigerating end 3 under the action of the phase change generating mechanism 5, and the internal pipeline of the refrigerating end 3 absorbs heat, thereby reducing the temperature of the protected equipment element.
In the second step, the control mechanism 6 controls the phase change medium after absorbing heat to flow to the monitoring assembly 1 along the circulation line 2, and detects the state of the phase change medium through various sensors of the monitoring assembly 1.
In the third step, the control mechanism 6 controls the phase change medium to flow through the phase change generator 5 through the monitoring assembly 1.
And fourthly, the control mechanism 6 controls the phase change medium to continuously flow through the phase change generator 5 and flow to the heat dissipation end 4, the phase change medium is controlled to generate heat release and phase change at the heat dissipation end 4, and the phase change medium is controlled to generate phase change after heat is released. And controlling the phase change medium to continuously flow to perform the next phase change circulation.
In this embodiment, the phase change medium undergoes a phase change, specifically, heat transfer of heat absorption or heat release is realized by the change of the state (gas, liquid, and solid) of the phase change medium. For example, when the phase change medium changes from a liquid to a gas, heat absorption is required, and an endothermic phase change occurs. When the phase change medium changes from a gaseous state to a liquid state, heat is released, and an exothermic phase change occurs.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A phase change attemperator in a well, comprising: the device comprises a refrigerating end, a heat dissipation end, a circulating mechanism and a phase change control mechanism;
the refrigerating end, the heat dissipation end and the phase change control generation mechanism are all communicated with the circulation mechanism; the circulation mechanism contains a phase change medium;
the control phase change generation mechanism is used for controlling the phase change medium to generate heat absorption phase change at the refrigeration end; and the phase change control module is also used for controlling the phase change medium subjected to heat absorption phase change to perform heat dissipation phase change at the heat dissipation end.
2. The downhole phase change temperature regulating device according to claim 1, wherein the means for controlling the phase change to occur comprises: a phase change generating mechanism and a control mechanism;
the control mechanism is used for controlling the phase change generating mechanism to act on the phase change medium so that the phase change medium generates heat absorption phase change at the refrigerating end; and the phase change generating mechanism is also used for controlling the phase change generating mechanism to act on the phase change medium after the heat absorption phase change occurs, so that the phase change medium generates heat dissipation phase change at the heat dissipation end.
3. The downhole phase change temperature regulating device of claim 1, further comprising: a monitoring component; the monitoring assembly is arranged on the circulating mechanism.
4. The downhole phase change attemperating device of claim 3, wherein the monitoring component comprises a sensor and a valve.
5. The downhole phase change temperature regulating device according to claim 2, wherein the circulating mechanism is a circulating pipeline which interconnects the cooling end, the heat dissipating end and the phase change control generating mechanism;
the refrigeration end includes: a tubular housing, an internal conduit, and an end cap; the internal pipeline is communicated with the circulating mechanism; the tubular housing is disposed outside the internal conduit; the end cap is used for closing the tubular shell;
the heat dissipation end comprises a plurality of continuous cavity spaces formed by pipelines;
the phase change generating mechanism includes: phase change generator, driving motor and control circuit.
6. The downhole phase change temperature regulating device according to claim 5, wherein the phase change generator is configured to act on the phase change medium to cause the phase change medium to undergo an endothermic phase change at the cooling end; and the phase change material is also used for acting on the phase change medium after the heat absorption phase change, so that the phase change medium generates heat dissipation phase change at the heat dissipation end.
7. The downhole phase change tempering device according to any of claims 1-6, wherein said downhole phase change tempering device is provided on a downhole instrumentation device.
8. The downhole phase change attemperation device of any one of claims 1-6, wherein the downhole phase change attemperation device is disposed within a drilling sub;
the circulation mechanism, the refrigerating end, the heat dissipation end, the circulation mechanism and the phase change control generation mechanism are all arranged in the drilling pup joint shell;
the refrigerating end is adjacent to the front end of a water hole of the drilling nipple;
the heat dissipation end is adjacent to the rear end of the water hole of the drilling nipple.
9. A downhole phase change temperature regulation method suitable for the downhole phase change temperature regulation device according to any one of claims 1 to 6, comprising:
step A1, the phase change generating mechanism is controlled to push the phase change medium to enter a refrigerating end; controlling the phase change medium to absorb heat and change phase at the refrigerating end;
step A2: the phase change control mechanism controls the phase change medium which has absorbed heat and changed phase to enter the heat dissipation end, and controls the phase change medium to have heat dissipation and phase change at the heat dissipation end.
10. A downhole phase change temperature regulation method is characterized by comprising the following steps: the phase change of the phase change medium is controlled to realize the heat transfer, thereby realizing the temperature adjustment of the underground equipment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111028129.XA CN113738306A (en) | 2021-09-02 | 2021-09-02 | Underground phase-change temperature adjusting method and device |
| PCT/CN2021/138612 WO2023029297A1 (en) | 2021-09-02 | 2021-12-16 | Underground phase change temperature regulation method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111028129.XA CN113738306A (en) | 2021-09-02 | 2021-09-02 | Underground phase-change temperature adjusting method and device |
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| CN113738306A true CN113738306A (en) | 2021-12-03 |
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| CN202111028129.XA Pending CN113738306A (en) | 2021-09-02 | 2021-09-02 | Underground phase-change temperature adjusting method and device |
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| WO (1) | WO2023029297A1 (en) |
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| WO2023029297A1 (en) | 2023-03-09 |
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