Fluid-driven active cooling device

Abstract

The invention relates to the technical field of petroleum drilling, in particular to a fluid-driven active cooling device, and aims to solve the problem that underground equipment cannot be reliably cooled. The device comprises an equipment bin, a generator and a Peltier refrigeration sheet, the generator is mounted in the equipment bin, and the Peltier refrigeration sheet is mounted in the equipment bin; under the driving of the drilling fluid, the generator generates electricity and supplies power to the Peltier refrigeration sheet, and the Peltier refrigeration sheet performs refrigeration so as to reduce the temperature in the equipment bin. The drilling fluid is used as a power source, the generator is driven to generate electricity through flowing of the drilling fluid, then power is supplied to the Peltier refrigeration piece for refrigeration, continuous cooling of electronic equipment is achieved while drilling is conducted, and the drilling fluid cooling device has the advantages of being simple in structure, stable in performance, low in energy consumption and free of an additional power source.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, and in particular to an active cooling device driven by a fluid. Background Art

[0002] As the drilling depth increases, the underground ambient temperature is also rising rapidly. High temperature can easily cause early damage to downhole tools and instruments. The sensors, chips, and measurement and control circuit boards of tools and instruments such as rotary steerable tools, vertical drilling tools, and measurement while drilling instruments are highly sensitive to high temperatures. The stability, working efficiency, and service life of electronic components will drop significantly in high temperature environments, and the failure rate will increase, which may lead to failure and damage. In addition, there are technical bottlenecks in improving temperature resistance, which seriously restricts the exploration and development of high-temperature oil and gas resources.

[0003] High-temperature well drilling usually uses ground drilling fluid cooling equipment to reduce the temperature of the drilling fluid entering the well, thereby reducing the ambient temperature of downhole tools and instruments, which can achieve certain results. However, the technical indicators, automation level and application reliability of field application products are relatively low, and the manufacturing cost of large-scale equipment is high, so it has not been widely promoted and applied; at the same time, there is a cooling limit for cooling the drilling fluid from the ground, and the effect is not ideal in high-temperature wells with bottom hole temperatures exceeding 150°C. Summary of the invention

[0004] The object of the present invention is to provide a fluid-driven active cooling device to solve the problem that downhole equipment cannot be cooled reliably.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] A fluid-driven active cooling device comprises an equipment bin, a generator and a Peltier cooling sheet; the generator is installed in the equipment bin, and the Peltier cooling sheet is installed in the equipment bin; driven by drilling fluid, the generator generates electricity and supplies power to the Peltier cooling sheet, and the Peltier cooling sheet performs cooling to reduce the temperature in the equipment bin.

[0007] Furthermore, the equipment bin includes an inner wall, the inner wall forms a working chamber, and the working chamber is used to accommodate electronic components; the Peltier cooling sheet is connected to the inner wall.

[0008] Furthermore, the equipment bin also includes an insulating wall, and the working chamber is arranged in the insulating wall; one end of the Peltier cooling plate is connected to the inner wall, and the other end is connected to the insulating wall.

[0009] Furthermore, the equipment compartment also includes a partition wall, and the heat insulating wall is arranged inside the partition wall; an inner flow channel is formed between the heat insulating wall and the partition wall, and the drilling fluid flows through the inner flow channel.

[0010] Furthermore, the equipment warehouse also includes an outer wall, and the partition wall is arranged inside the outer wall; an outer flow channel is formed between the partition wall and the outer wall, the inlet of the outer flow channel is connected to the outlet of the inner flow channel, and the drilling fluid flows out through the inner flow channel and the outer flow channel in turn; the flow directions of the drilling fluid in the inner flow channel and the outer flow channel are opposite.

[0011] Furthermore, the fluid-driven active cooling device also includes a flow control unit, and the flow control unit is used to control the flow of drilling fluid entering the generator.

[0012] Furthermore, the cavity between the heat-insulating wall and the working chamber is a heat-insulating cavity, and the heat-insulating cavity is evacuated and / or filled with heat-insulating material.

[0013] Furthermore, the inner wall and the heat insulating wall are both made of heat conductive materials.

[0014] Furthermore, a heat dissipation structure is provided on the side of the heat insulation wall in contact with the drilling fluid.

[0015] Furthermore, the heat dissipation structure is configured as fins.

[0016] Based on the above technical solutions, the technical effects that can be achieved by the present invention are:

[0017] The fluid-driven active cooling device provided by the present invention comprises an equipment bin, a generator and a Peltier cooling sheet; the generator is installed in the equipment bin, and the Peltier cooling sheet is installed in the equipment bin; the generator is driven by drilling fluid to generate electricity and supply power to the Peltier cooling sheet, and the Peltier cooling sheet performs cooling to reduce the temperature in the equipment bin.

[0018] The active cooling device provided by the present invention uses the circulating drilling fluid as a power source, drives the generator to generate electricity through the flow of the drilling fluid, and then powers the Peltier cooling plate for cooling, thereby realizing continuous cooling of electronic equipment while drilling. Compared with compressor refrigeration and absorption refrigeration, the semiconductor refrigeration method has the advantages of simple structure, stable performance, and low energy consumption. Only the Peltier cooling plate consumes electrical energy and no additional power supply is required. It can reliably cool down to ensure the normal operation of temperature-sensitive equipment. In addition, the drilling fluid can also be used to take away the released heat to avoid heat accumulation and reduce the heat dissipation effect.

[0019] The active cooling device provided by the present invention can form a relatively low temperature environment with a temperature less than 150°C in a high temperature environment of 200°C to ensure the normal operation of electronic equipment such as sensors in the high temperature wellbore, thereby ensuring the normal progress of deep well drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a fluid-driven active cooling device provided in an embodiment of the present invention;

[0022] Figure 2 for Figure 1 AA cross-section diagram in.

[0023] Icons: 100-equipment compartment; 200-generator; 300-Peltier cooling plate; 110-inner wall; 120-insulating wall; 130-partition wall; 140-outer wall; 150-first connecting rib; 160-second connecting rib; a-working chamber; b-inner flow channel; c-outer flow channel; d-insulating chamber; e-driving flow channel. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] For high-temperature well drilling, the use of ground drilling fluid cooling equipment to reduce the temperature of the drilling fluid entering the well, and then reduce the ambient temperature of downhole tools and instruments, can have a certain effect. However, the current technical indicators, automation level and application reliability of field application products are relatively low, and the manufacturing cost of large equipment is high, so it has not been widely promoted and applied; at the same time, there is a cooling limit for cooling the drilling fluid from the ground, and the effect is not ideal in high-temperature wells with bottom hole temperatures exceeding 150°C.

[0028] In view of this, the present invention provides a fluid-driven active cooling device, including an equipment bin 100, a generator 200 and a Peltier cooling sheet 300; the generator 200 is installed in the equipment bin 100, and the Peltier cooling sheet 300 is installed in the equipment bin 100; driven by drilling fluid, the generator 200 generates electricity and supplies power to the Peltier cooling sheet 300, and the Peltier cooling sheet 300 performs cooling to reduce the temperature in the equipment bin 100.

[0029] The active cooling device provided by the present invention uses the circulating drilling fluid as a power source, and drives the generator 200 to generate electricity through the flow of the drilling fluid, and then supplies power to the Peltier cooling plate 300 for cooling, so as to achieve continuous cooling of electronic equipment while drilling. Compared with compressor refrigeration and absorption refrigeration, the semiconductor refrigeration method has the advantages of simple structure, stable performance and low energy consumption. Only the Peltier cooling plate 300 consumes electrical energy and no additional power supply is required. It can reliably cool down to ensure the normal operation of temperature-sensitive equipment. In addition, the drilling fluid can also be used to take away the released heat to avoid heat accumulation and reduce the heat dissipation effect.

[0030] The active cooling device provided by the present invention can form a relatively low temperature environment with a temperature less than 150°C in a high temperature environment of 200°C to ensure the normal operation of electronic equipment such as sensors in the high temperature wellbore, thereby ensuring the normal progress of deep well drilling.

[0031] The following combination Figure 1 , Figure 2 The structure and shape of the fluid-driven active cooling device provided in this embodiment are described in detail:

[0032] In this embodiment, the fluid-driven active cooling device includes an equipment compartment 100, a generator 200, and a Peltier cooling sheet 300. Figure 1 As shown, the equipment compartment 100 is provided with a driving channel e, an inner channel b and an outer channel c which are connected in sequence, and the generator 200 is installed in the driving channel e. That is, the drilling fluid enters from the driving channel e and drives the generator 200 to generate electricity, then enters the inner channel b, then turns back from the inner channel b and enters the outer channel c, and finally flows out, that is, the flow directions of the drilling fluid in the inner channel b and the outer channel c are opposite, and one end of the equipment compartment 100 is closed, and the other end is provided with an inlet of the driving channel e and an outlet of the outer channel c. It should be noted that the generator 200 is a DC generator 200.

[0033] Specifically, Figure 2As shown, the equipment warehouse 100 includes an inner wall 110, an insulating wall 120, a partition wall 130 and an outer wall 140 from the inside to the outside. The generator 200 is installed inside the outer wall 140. The annular space enclosed by the outer wall 140 and the partition wall 130 is the outer flow channel c. The section of the outer wall 140 that does not correspond to the partition wall 130 is the driving flow channel e; the annular space enclosed by the partition wall 130 and the insulating wall 120 is the inner flow channel b; the annular space between the insulating wall 120 and the inner wall 110 forms an insulating cavity d; the space enclosed by the inner wall 110 is the working chamber a, which is closed to accommodate electronic components.

[0034] Specifically, one end of the Peltier cooling sheet 300 is connected to the inner wall 110, and the other end is connected to the insulation wall 120. In this embodiment, three Peltier cooling sheets 300 are evenly distributed in an annular shape and divide the insulation chamber d into three sections. The insulation chamber d is filled with insulation material or evacuated, or filled with insulation material and evacuated at the same time, thereby reducing the heat transfer between the working chamber a and the inner flow channel b, and preventing the heat of the inner flow channel b from being transferred to the working chamber a, causing the temperature of the working chamber a to rise. The insulation material can be selected from materials such as rock wool, glass fiber, and vacuum board.

[0035] In this embodiment, a first connecting rib 150 is arranged between the insulation wall 120 and the partition wall 130, and a second connecting rib 160 is arranged between the partition wall 130 and the outer wall 140. The first connecting rib 150 and the second connecting rib 160 are used to stabilize the structure and ensure the stability of the inner flow channel b and the outer flow channel c to withstand the impact of the drilling fluid.

[0036] In this embodiment, a heat dissipation structure is provided on the side of the heat insulation wall 120 that contacts the drilling fluid. Specifically, the heat dissipation structure can be provided as fins to increase the heat exchange area between the heat insulation wall 120 and the drilling fluid, so that the heat generated by the Peltier cooling sheet 300 can be quickly dissipated to the drilling fluid flowing through the inner flow channel b, avoiding heat accumulation that causes the temperature of the Peltier cooling sheet 300 to be too high, and ensuring the cooling effect and cooling efficiency of the Peltier cooling sheet 300.

[0037] Furthermore, both the inner wall 110 and the heat insulating wall 120 are made of heat conductive materials to ensure heat dissipation efficiency.

[0038] In an optional solution of this embodiment, the fluid-driven active cooling device further includes a flow control unit, which is used to control the flow of drilling fluid entering the generator 200, and specifically may include structures such as an electromagnetic throttle valve to adjust the flow of drilling fluid entering the generator 200. The flow control unit may be installed at the entrance of the driving flow channel e to control the total incoming flow, or a separate flow channel may be provided to specifically control the flow of drilling fluid entering the generator 200, that is, a separate flow channel is provided in the driving flow channel for installing the generator 200 and the flow control unit to control the flow of drilling fluid entering the generator 200.

[0039] Furthermore, the flow control unit also includes a temperature sensor and a control module, both of which are installed in the working chamber a, the temperature sensor is used to detect the temperature of the working chamber a, and the control module adjusts the opening of the electromagnetic throttle valve according to the information provided by the temperature sensor to adjust the power generation of the generator 200, thereby controlling the cooling capacity of the Peltier cooling sheet 300, and finally accurately controlling the temperature of the working chamber a within the required range. Among them, the control module can also control the working state of the Peltier cooling sheet 300, that is, control the on-off of the circuit.

[0040] The working process of the fluid-driven active cooling device provided in this embodiment is as follows:

[0041] After the drilling fluid is injected into the driving flow channel e, the drilling fluid drives the generator 200 to generate electricity to activate the temperature sensor and the control module, and the Peltier cooling sheet 300 starts to work.

[0042] Specifically, the drilling fluid flows through the driving channel e, the inner channel b and the outer channel c in sequence. The Peltier cooling sheet 300 absorbs the heat from the inner wall 110 to reduce the temperature of the working chamber a, thereby ensuring the normal operation of the electronic components in the working chamber a. At the same time, the Peltier cooling sheet 300 dissipates the heat to the insulation wall 120 and is taken away by the drilling fluid in the inner channel b. Among them, the heat dissipation structure can accelerate the heat dissipation from the insulation wall 120 to the drilling fluid in the inner channel b. That is, the heat in the working chamber a is dissipated to the drilling fluid through the inner wall 110, the Peltier cooling sheet 300 and the insulation wall 120 in sequence.

[0043] The drilling fluid that absorbs heat enters the outer flow channel c from the inner flow channel b and flows out. The drilling fluids in the inner flow channel b and the outer flow channel c form barriers on both sides to shield the high temperature of the external environment.

[0044] The active cooling device provided in this embodiment forms two-stage refrigeration, that is, the high temperature of the external environment is isolated by the drilling fluid in the outer flow channel c and the heat is taken away to form passive refrigeration, and the heat in the working chamber a is cooled by the Peltier cooling sheet 300 to form active refrigeration. The two-stage refrigeration fully guarantees the cooling effect and creates a relatively low temperature environment. That is, the drilling fluid in the inner flow channel b and the outer flow channel c can take away the dissipated heat and form a protective barrier, the Peltier cooling sheet 300 can reduce the temperature in the working chamber a, and the insulation effect of the insulation chamber d ensures the temperature of the working chamber a, thereby ensuring the normal operation of the electronic components.

[0045] The fluid-driven active cooling device provided in this embodiment uses the flow of drilling fluid to drive the generator 200 to generate electricity for the Peltier cooling plate 300, and uses the circulating drilling fluid to take away the heat generated by the Peltier cooling plate 300, thereby achieving automatic cooling. In addition, the flowing drilling fluid also has the function of isolating the external high-temperature environment, so that the heat of the external high-temperature environment will not be directly conducted into the working chamber a, but will be directly taken away by the drilling fluid.

[0046] The fluid-driven active cooling device provided in this embodiment adopts a simple and reliable technical solution and a lightweight and compact system structure, achieving super cooling performance, completely solving the problem of normal use of equipment under high temperature conditions, achieving ideal use effects, and having the advantages of long service life and stable performance. In actual use, a relatively low temperature working chamber a with a temperature less than 150°C can be formed in a high temperature environment of 200°C, ensuring the normal operation of various equipment such as sensors in a high temperature environment. It is a temperature control device with a simple structure, excellent performance, and strong environmental adaptability, which can fully meet the needs of precise temperature control under extreme high temperature conditions.

[0047] The fluid-driven active cooling device provided in this embodiment has the following advantages:

[0048] 1. No external power supply is required, which avoids the possible failure and complexity caused by the external power supply. It is easy to install and use, and improves the reliability of the system. The components used, such as the generator 200, have a wide temperature adaptability range and can work stably in an environment of 0-200℃, with good environmental adaptability.

[0049] 2. No electronic device is required for control. The cooling effect is controlled only according to the drilling fluid flow rate. The greater the drilling fluid flow rate, the greater the power supply of the generator 200, and the better the cooling effect. The active cooling of the Peltier cooling sheet 300 can achieve a temperature of the working chamber a that is 5°C-50°C lower than the ambient temperature, which fully meets the temperature environment requirements for normal operation of the equipment.

[0050] 3. The system has simple principle, compact structure, high reliability, easy maintenance, not prone to failure and long service life.

[0051] 4. It can work stably and reliably under extremely high temperatures and harsh conditions, has a wide range of environmental adaptability, and completely solves various problems caused by high temperatures during the use of underground equipment.

[0052] Therefore, the active cooling device provided in this embodiment has the characteristics of simple structure, reliable principle, no need for external power supply, strong environmental adaptability, high stability and long service life. It can achieve precise temperature control through simple adjustment under extremely high temperature conditions, and fully meet the use requirements of underground equipment.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fluid-driven active cooling device, characterized in that: It comprises an equipment warehouse (100), a generator (200) and a Peltier cooling sheet (300); The generator (200) is installed in the equipment compartment (100), and the Peltier cooling plate (300) is installed in the equipment compartment (100); driven by drilling fluid, the generator (200) generates electricity and supplies power to the Peltier cooling plate (300), and the Peltier cooling plate (300) performs cooling to reduce the temperature in the equipment compartment (100).

2. The fluid-driven active cooling device according to claim 1, characterized in that: The equipment bin (100) comprises an inner wall (110), wherein the inner wall (110) forms a working chamber (a), and the working chamber (a) is used to accommodate electronic components; The Peltier cooling sheet (300) is connected to the inner wall (110).

3. The fluid-driven active cooling device according to claim 2, characterized in that: The equipment warehouse (100) further comprises a heat-insulating wall (120), and the working chamber (a) is arranged in the heat-insulating wall (120); One end of the Peltier cooling sheet (300) is connected to the inner wall (110), and the other end is connected to the heat insulation wall (120).

4. The fluid-driven active cooling device according to claim 3, characterized in that: The equipment warehouse (100) further comprises a partition wall (130), and the heat insulation wall (120) is arranged inside the partition wall (130); An inner flow channel (b) is formed between the heat insulation wall (120) and the partition wall (130), and drilling fluid flows through the inner flow channel (b).

5. The fluid-driven active cooling device according to claim 4, characterized in that: The equipment warehouse (100) further comprises an outer wall (140), and the partition wall (130) is arranged inside the outer wall (140); An outer flow channel (c) is formed between the partition wall (130) and the outer wall (140), the inlet of the outer flow channel (c) is connected to the outlet of the inner flow channel (b), and the drilling fluid flows out through the inner flow channel (b) and the outer flow channel (c) in sequence; The flow directions of the drilling fluid in the inner flow channel (b) and the outer flow channel (c) are opposite.

6. The fluid-driven active cooling device according to claim 5, characterized in that: It also comprises a flow control unit, which is used to control the flow of drilling fluid entering the generator (200).

7. The fluid-driven active cooling device according to claim 3, characterized in that: The cavity between the heat-insulating wall (120) and the working chamber (a) is a heat-insulating cavity (d), and the heat-insulating cavity (d) is evacuated and / or filled with heat-insulating material.

8. The fluid-driven active cooling device according to claim 3, characterized in that: The inner wall (110) and the heat insulating wall (120) are both made of heat conductive materials.

9. The fluid-driven active cooling device according to claim 3, characterized in that: A heat dissipation structure is provided on the side of the heat insulation wall (120) in contact with the drilling fluid.

10. The fluid-driven active cooling device according to claim 9, characterized in that: The heat dissipation structure is configured as fins.

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