Protection system, protection method and control method for drilling chip

Abstract

The application provides a protection system, a protection method and a control method of a drilling chip. The protection system of the drilling chip comprises a shell, a cabin, a cooling device and a thermal insulation layer. The inside of the shell is in a negative pressure state, the cabin is arranged in the shell, and the drilling chip is arranged in the cabin. The cooling device is arranged outside the shell and is used for conveying cooling liquid with a preset temperature to the cabin, exchanging heat between the cooling liquid and the drilling chip to cool the drilling chip, and outputting the cooling liquid after heat exchange. The temperature of the cooling liquid is lower than the temperature of the drilling chip. The thermal insulation layer is arranged on the outer wall of the shell. In the application, the drilling chip is cooled by the cooling device to keep the drilling chip at a low temperature, thereby improving the high-temperature resistance of the drilling chip. The inside of the shell is in a negative pressure state, thereby avoiding gas flow heat transfer. The shell and the thermal insulation layer can isolate the temperature of the outside world, avoid the temperature of the outside world from being transmitted to the drilling chip, and keep the cabin at a low temperature.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and more specifically, to a protection system, protection method, and control method for a drilling chip. Background Technology

[0002] As oil extraction continues to advance, the average well depth in the drilling industry is constantly increasing, which in turn increases the difficulty of oil drilling operations. During oil exploration and well probing, instruments often operate thousands of meters deep (up to 8000 meters or more). The environment in deep wells is characterized by high temperature, high pressure, and severe vibration. Under such environmental conditions, the electronic components and circuits within the instruments are difficult to operate reliably, which can easily lead to instrument malfunctions and affect drilling efficiency. Summary of the Invention

[0003] In view of this, the present invention proposes a protection system for drilling chips, aiming to solve the problem that existing technologies cannot reliably operate instruments in deep well environments during deep well exploration. The present invention also proposes a protection method and a protection control method for drilling chips.

[0004] In one aspect, the present invention proposes a protection system for a drilling chip, the system comprising: a housing, a chamber, a cooling device, and a heat insulation layer; wherein, the interior of the housing is under negative pressure, the chamber is disposed within the housing, and the drilling chip is disposed within the chamber; the cooling device is disposed outside the housing, and is used to cool the drilling chip by supplying coolant with a preset temperature to the chamber, thereby exchanging heat between the coolant and the drilling chip, and outputting the cooled coolant after heat exchange; the temperature of the coolant is lower than the temperature of the drilling chip; and the heat insulation layer is disposed on the outer wall of the housing.

[0005] Furthermore, in the aforementioned protection system for the drilling chip, the cooling device includes: a first heat exchange device and a cooling device; wherein, the first heat exchange device and the cooling device are both located on the same side of the housing, the first inlet of the first heat exchange device is used to receive drilling fluid, and the second inlet of the first heat exchange device is connected to the chamber through an output pipe to receive coolant after heat exchange with the drilling chip; the first outlet of the first heat exchange device is used to output the drilling fluid that has been heated after heat exchange with the coolant, and the second outlet of the first heat exchange device is connected to the chamber through a cooling device and an input pipe; the cooling device is used to cool the coolant after heat exchange with the drilling fluid and to transport the cooled coolant into the chamber.

[0006] Furthermore, in the aforementioned protection system for the drilling chip, the cooling device further includes: a compressor, which is located on the other side of the housing, with its inlet connected to its outlet pipe to receive coolant after heat exchange with the drilling chip, and its outlet connected to the second inlet of the first heat exchange device to deliver the pressurized and heated coolant to the first heat exchange device; and / or a generator, with its inlet for receiving drilling fluid and its outlet connected to the first inlet of the first heat exchange device.

[0007] Furthermore, in the protection system of the aforementioned drilling chip, the first heat exchange device is a condenser; and / or, the cooling device is a pressure reducing valve, which is located on the input pipe.

[0008] Furthermore, in the protection system of the aforementioned drilling chip, the cooling device further includes: a second heat exchange device; wherein, the second heat exchange device is disposed outside the insulation layer, the first inlet of the second heat exchange device is connected to the outlet of the compressor, the second inlet of the second heat exchange device is connected to the first outlet of the first heat exchange device, the first outlet of the second heat exchange device is connected to the second inlet of the first heat exchange device to transport the cooled coolant after heat exchange to the first heat exchange device, and the second outlet of the second heat exchange device is used to output the heated drilling fluid after heat exchange.

[0009] In this invention, the drilling chip is cooled by a cooling device, which keeps the drilling chip at a low temperature, improves its high-temperature resistance, ensures the normal operation of the drilling tool, improves drilling efficiency, and solves the problem that existing instruments cannot work reliably in deep well environments during deep well exploration. The shell is under negative pressure, which prevents heat transfer from gas flow and thus prevents the transfer of temperature from the drilling chip, thus providing heat insulation. Furthermore, the shell and insulation layer can isolate the external temperature, preventing external temperature from being transferred to the drilling chip, and also keep the chamber at a low temperature, ensuring the stable operation of the drilling chip. At the same time, the drilling chip can work in high-temperature environments, making its working range flexible and adjustable.

[0010] On the other hand, the present invention also proposes a method for protecting a drilling chip, the method comprising the following steps: a first heat exchange step, wherein drilling fluid and coolant are both supplied to a heat exchange device, and the drilling fluid and coolant exchange heat to cool the coolant; a cooling step, wherein the coolant after heat exchange and cooling is cooled again; a second heat exchange step, wherein the cooled coolant is supplied to a chamber to cool the drilling chip inside the chamber; a processing step, wherein the coolant after heat exchange and heating with the drilling chip is supplied to the heat exchange device; and the above steps are repeated when the temperature of the drilling chip is detected to be greater than or equal to a preset operating temperature.

[0011] Furthermore, in the above-mentioned method for protecting the drilling chip, before the first heat exchange step, the method further includes: detecting the temperature of the drilling chip; when the temperature of the drilling chip is greater than or equal to the preset operating temperature, executing the first heat exchange step, the cooling step, the second heat exchange step, and the processing step to cool the drilling chip; detecting the temperature of the drilling chip again; when the temperature of the drilling chip is greater than or equal to the preset operating temperature, repeating the first heat exchange step, the cooling step, the second heat exchange step, and the processing step until the temperature of the drilling chip is lower than the preset operating temperature and the cooling of the drilling chip is stopped.

[0012] Furthermore, in the above-mentioned method for protecting the drilling chip, the processing steps include: a heating sub-step, in which the coolant after heat exchange with the drilling chip is pressurized and heated; an output sub-step, in which the pressurized and heated coolant is transported to a heat exchange device; and a cooling step, in which the coolant after heat exchange is depressurized and cooled.

[0013] In this invention, after the drilling fluid and coolant exchange heat, the temperature of the coolant can be reduced. Then, the cooled coolant is further cooled before being transported into the chamber to exchange heat with the drilling chip. This not only makes full use of the temperature of the drilling fluid and improves energy efficiency, but also ensures that the coolant has a sufficiently low temperature, thereby cooling the drilling chip and improving its high-temperature resistance. This ensures the normal operation of the drilling tool, improves drilling efficiency, and allows the drilling chip to work in high-temperature environments, making its working range flexible and adjustable.

[0014] On the other hand, the present invention also proposes a protection and control method for a drilling chip, which includes the following steps: a detection step, detecting the temperature of the drilling chip; an adjustment step, comparing the temperature of the drilling chip with a preset working temperature, and cooling the drilling chip by a cooling device when the temperature of the drilling chip is greater than or equal to the preset working temperature; and repeating the detection step and the adjustment step after a preset time delay when the temperature of the drilling chip is less than the preset working temperature.

[0015] Furthermore, in the above-mentioned protection and control method for drilling chips, in the adjustment step, when the temperature of the drilling chip is greater than or equal to the preset operating temperature, the flow rate of the coolant and / or the flow rate of the drilling fluid is increased to allow the coolant and drilling fluid to exchange heat, thereby cooling the drilling chip through the coolant.

[0016] Furthermore, in the above-mentioned protection and control method for the drilling chip, the adjustment steps include: a coolant flow rate adjustment sub-step, which compares the temperature of the drilling chip with a preset operating temperature, and increases the power of the compressor to increase the coolant flow rate when the temperature of the drilling chip is greater than or equal to the preset operating temperature; the temperature of the drilling chip is detected again, and when the temperature of the drilling chip detected this time is greater than or equal to the temperature of the drilling chip detected last time, the power of the compressor is increased to increase the drilling fluid flow rate; a drilling fluid flow rate first adjustment sub-step, which repeats the coolant flow rate adjustment sub-step until the power of the compressor increases to the maximum power, and then increases the power of the mud pump to increase the drilling fluid flow rate; a drilling fluid flow rate second adjustment sub-step, which detects the temperature of the drilling chip again, and when the temperature of the drilling chip detected this time is greater than or equal to the temperature of the drilling chip detected last time, the power of the mud pump is increased to the maximum power; and repeats the drilling fluid flow rate second adjustment sub-step until the power of the mud pump increases to the maximum power.

[0017] In this invention, the drilling chip is cooled by a cooling device, which keeps the drilling chip at a low temperature, improves the high temperature resistance of the drilling chip, and thus ensures the normal operation of the drilling tool and improves drilling efficiency. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the protection system for the drilling chip provided in an embodiment of the present invention;

[0020] Figure 2 A flowchart illustrating a method for protecting drilling chips provided in an embodiment of the present invention;

[0021] Figure 3 Another flowchart of the method for protecting drilling chips provided in the embodiments of the present invention;

[0022] Figure 4 A flowchart illustrating the protection and control method for a drilling chip provided in an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the protection and control method for drilling chips provided in an embodiment of the present invention. Detailed Implementation

[0024] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] System Implementation Example:

[0026] See Figure 1 , Figure 1 This is a schematic diagram of the protection system for a drilling chip provided in an embodiment of the present invention. As shown in the figure, the drilling chip 3 is an electronic control device of the drilling tool. The drill rod in the drilling tool is hollow and cylindrical. The drilling chip 3 is disposed inside the drill rod, and therefore the protection system for the drilling chip is also disposed inside the drill rod. The protection system for the drilling chip includes: a housing 1, a chamber 2, a cooling device 5, and a heat insulation layer 4. The housing 1 is under negative pressure; in this embodiment, the housing 1 is under vacuum. The chamber 2 is disposed inside the housing 1, and the chamber 2 is located near the top of the housing 1. Figure 1 The upper part shown is configured as follows. Specifically, one end of the compartment 2 is open, and the open end of the compartment 2 is connected to the top wall of the shell 1. Figure 1 The upper wall shown is connected to the hull 2, and the closed end of the hull 2 ​​is connected to the bottom of the shell 1. Figure 1 There is a preset distance between the lower parts shown, which can be determined according to the actual situation. This embodiment does not impose any restrictions on this. A drilling chip 3 is provided inside the cabin 2, and the drilling chip 3 is connected to the top wall of the shell 1.

[0027] The heat insulation layer 4 is wrapped around the outer wall of the shell 1. The heat insulation layer 4 can be made of heat insulation material or high-performance heat insulation material. The heat insulation layer 4 wraps around the outer side wall, top wall and bottom wall of the shell 1 to play the role of heat insulation.

[0028] A cooling device 5 is located outside the housing 1. The cooling device 5 supplies coolant at a preset temperature to the chamber 2, wherein the temperature of the coolant is lower than the temperature of the drilling chip 3. Heat exchange occurs between the coolant and the drilling chip 3 to cool the chip, and the cooled coolant is then output to ensure that the temperature of the drilling chip 3 remains at the preset operating temperature, preventing excessively high temperatures from affecting normal operation. In specific implementations, the preset operating temperature can be determined according to actual conditions; this embodiment does not impose any limitations on this.

[0029] Specifically, the coolant is delivered to the chamber 2 through the inlet pipe 7, and the heated coolant is output through the outlet pipe 6. The inlet pipe 7 passes through the top wall of the housing 1 and is connected to the chamber 2. The first end of the outlet pipe 6 is connected to the chamber 2, and the outlet pipe 6 passes through the bottom wall of the housing 1, with its second end located outside the housing 1. The coolant has a preset low temperature. The coolant exchanges heat with the drilling chip 3, causing the temperature of the drilling chip 3 to decrease while the temperature of the coolant increases. The outlet pipe 6 then outputs the heated coolant.

[0030] In practice, the input pipe 7 and the output pipe 6 are also covered with a heat insulation layer to ensure the low temperature of the input coolant, prevent the low temperature of the coolant from spreading and affecting the heat exchange and cooling effect of the coolant on the drilling chip 3, and also ensure the high temperature of the output coolant to prevent the high temperature of the coolant from spreading.

[0031] As can be seen, in this embodiment, the drilling chip 3 is cooled by the cooling device 5, which keeps the drilling chip 3 at a low temperature, improves the high temperature resistance of the drilling chip 3, and thus ensures the normal operation of the drilling tool, improves drilling efficiency, and solves the problem that the instrument cannot work reliably in the deep well environment when exploring deep wells. The inside of the shell 1 is in a negative pressure state, which avoids heat transfer from gas flow and thus avoids the transfer of temperature of the drilling chip 3, playing a heat insulation role. In addition, the shell 1 and the heat insulation layer 4 can isolate the external temperature and prevent the external temperature from being transferred to the drilling chip 3. It can also keep the cabin 2 at a low temperature, ensuring the stable operation of the drilling chip 3. At the same time, the drilling chip 3 can work in a high temperature environment, making the working range of the drilling chip 3 flexible and adjustable.

[0032] See Figure 1 In the above embodiments, the cooling device 5 may include a first heat exchange device 51 and a cooling device 52. Both the first heat exchange device 51 and the cooling device 52 are located on the same side of the housing 1. The first inlet of the first heat exchange device 51 is used to receive drilling fluid, which flows from the surface system through the interior of the drill pipe to the drill bit. Since the cooling device 5 is located within the drill pipe, the drilling fluid flows from the surface system into the drill pipe and is then delivered to the first heat exchange device 51. Specifically, the drilling fluid is the circulating flushing medium used during drilling, the drill pipe is used to transmit the energy required by the drill bit to break the rock, and the interior of the drill pipe carries the circulating drilling fluid.

[0033] The second inlet of the first heat exchanger 51 is connected to the chamber 2 via the output pipe 6. The second inlet of the first heat exchanger 51 is used to receive the coolant after it has been heated by heat exchange with the drilling chip 3. Heat exchange occurs between the drilling fluid and the coolant within the first heat exchanger 51, causing the temperature of the drilling fluid to rise and the temperature of the coolant to fall. The first outlet of the first heat exchanger 51 is used to output the heated drilling fluid after heat exchange with the coolant, which flows towards the drill bit. The second outlet of the first heat exchanger 51 is connected to the chamber 2 via the cooling device 52 and the input pipe 7. The second outlet of the first heat exchanger 51 is used to transport the cooled coolant after heat exchange with the drilling fluid to the cooling device 52. The cooling device 52 further cools the coolant and then transports the cooled coolant into the chamber 2. Inside the chamber 2, the coolant continues to exchange heat with the drilling chip 3 to lower its temperature.

[0034] Preferably, the first heat exchange device 51 is a condenser.

[0035] As can be seen, in this embodiment, the coolant that has been heated by heat exchange with the drilling chip 3 exchanges heat with the drilling fluid in the first heat exchanger, thereby reducing the temperature of the coolant. The cooling device 52 further cools the cooled coolant, and then the coolant is transported to the chamber 2 to exchange heat with the drilling chip 3. This not only makes full use of the temperature of the drilling fluid and improves the energy utilization rate, but also uses the temperature of the drilling fluid and the cooling device 52 to cool the coolant to ensure that the coolant has a sufficiently low temperature, thereby achieving the cooling of the drilling chip 3.

[0036] See Figure 1 In the above embodiments, the cooling device 5 may further include a compressor 53. The compressor 53 is disposed on the other side of the housing 1, and the compressor 53, the first heat exchange device 51, and the cooling device 52 are respectively located on opposite sides of the housing 1. The compressor 53 is disposed between the output pipe 6 and the second inlet of the first heat exchange device 51. Specifically, the inlet of the compressor 53 is connected to the output pipe 6, and the inlet of the compressor 53 is used to receive the coolant after heat exchange and heating with the drilling chip 3. The compressor 53 is used to pressurize and heat the coolant, and the outlet of the compressor 53 is connected to the second inlet of the first heat exchange device 51. The outlet of the compressor 53 delivers the pressurized and heated coolant to the first heat exchange device 51 for heat exchange with the drilling fluid.

[0037] In practice, the heat insulation layer 4 can be placed on the outside of the compressor 53 to isolate the temperature of the coolant after it has been heated and pressurized, so as to prevent its temperature from spreading and affecting the heat exchange effect between the coolant and the drilling fluid.

[0038] As can be seen, in this embodiment, by pressurizing and heating the coolant after it has been heated by exchanging heat with the drilling chip 3 using the compressor 53, the heat exchange effect between the coolant and the drilling fluid can be greatly improved, allowing the coolant to cool down better.

[0039] Preferably, the cooling device 52 is a pressure reducing valve, which is installed on the inlet pipe 7. Since the pressure of the coolant increases after passing through the compressor 53, the pressure reducing valve releases the pressure of the coolant. During the pressure release process, its temperature will also drop significantly, thereby better reducing the temperature of the coolant and ensuring the heat exchange efficiency between the coolant and the drilling chip 3, thus ensuring the low temperature of the drilling chip 3.

[0040] In practice, the heat insulation layer 4 encloses both the pressure reducing valve and the input pipe 7 to ensure that the temperature of the coolant after being cooled by the pressure reducing valve is not affected by the outside environment.

[0041] In specific implementation, there can be two input pipes 7, both of which pass through the top wall of the shell 1 and are connected to the compartment 2. Furthermore, the second outlet of the first heat exchange device 51 is connected to both input pipes 7, and the second outlet of the first heat exchange device 51 delivers coolant to the two input pipes 7 respectively. Each input pipe 7 is equipped with a pressure-reducing valve, which reduces the pressure and temperature of the coolant in the corresponding input pipe 7.

[0042] Preferably, the first heat exchange device 51 is a condenser; and / or, the cooling device 52 is a pressure reducing valve, which is located on the inlet pipe 7. In specific implementations, the first heat exchange device 51 may simply be a condenser; or the cooling device 52 may simply be a pressure reducing valve, which is located on the inlet pipe 7; or the first heat exchange device 51 may be a condenser, and the cooling device 52 may be a pressure reducing valve, which is located on the inlet pipe 7.

[0043] See Figure 1In the above embodiments, the cooling device 5 may further include a second heat exchange device 54. The second heat exchange device 54 is disposed outside the insulation layer 4 and is positioned between the compressor 53 and the first heat exchange device 51. Specifically, the first inlet of the second heat exchange device 54 is connected to the outlet of the compressor 53, and the first inlet of the second heat exchange device 54 is used to receive the heated and pressurized coolant. The second inlet of the second heat exchange device 54 is connected to the first outlet of the first heat exchange device 51, and the second inlet of the second heat exchange device 54 is used to receive the drilling fluid output from the first heat exchange device 51 after exchanging heat with the coolant and increasing its temperature. Within the second heat exchange device 54, the heated and pressurized coolant continues to exchange heat with the drilling fluid, causing the temperature of the coolant to decrease and the temperature of the drilling fluid to increase. The first outlet of the second heat exchange device 54 is connected to the second inlet of the first heat exchange device 51. The first outlet of the second heat exchange device 54 is used to transport the cooled coolant after heat exchange to the first heat exchange device 51, and the second outlet of the second heat exchange device 54 is used to output the heated drilling fluid after heat exchange.

[0044] The second heat exchange device 54 may include two annular housings 1, one of which is fitted over the other, and the two annular housings 1 are in close contact. The inner annular housing 1 is fitted over the outer layer of the insulation layer 4. The inlet of one annular housing 1 is connected to the outlet of the compressor 53 to receive the heated and pressurized coolant, and the outlet of this annular housing 1 is connected to the second inlet of the first heat exchange device 51.

[0045] The inlet of another annular housing 1 is connected to the first outlet of the first heat exchange device 51 to receive the drilling fluid that has been heated by heat exchange with the coolant and output from the first heat exchange device 51. The outlet of the annular housing 1 is used to output the heated drilling fluid.

[0046] Because the two annular shells 1 are in close contact, the coolant after heating and pressurization can exchange heat with the drilling fluid, which lowers the temperature of the coolant and raises the temperature of the drilling fluid.

[0047] As can be seen, in this embodiment, in the second heat exchange device 54, the heated and pressurized coolant output by the compressor 53 exchanges heat with the heated drilling fluid output by the first heat exchange device 51, which can make full use of the temperature of the drilling fluid, improve energy utilization, and reduce the temperature of the coolant to a certain extent, which is convenient for subsequent cooling of the coolant.

[0048] See Figure 1In the above embodiments, the cooling device 5 may further include a generator 55. The inlet of the generator 55 is used to receive drilling fluid supplied from the surface system, and the outlet of the generator 55 is connected to the first inlet of the first heat exchange device 51. When the drilling fluid passes through the generator 55, the generator 55 reduces the pressure of the drilling fluid and generates electricity. This reduction in pressure lowers the temperature of the drilling fluid, facilitating heat exchange between the drilling fluid and the coolant in the first heat exchange device 51. Furthermore, a portion of the electricity generated by the generator 55 is supplied to the compressor 53, and the remainder is supplied to the drilling chip 3.

[0049] In specific implementation, generator 55 can be a turbine generator, and it can be a turbine generator set, with 2 to 3 turbine generator sets.

[0050] Preferably, the cooling device 5 includes a compressor 53 and / or a generator 55. The structure and connection relationship of the compressor 53 and the generator 55 can be referred to the above embodiments and will not be repeated here.

[0051] In summary, in this embodiment, cooling the drilling chip 3 using the cooling device 5 keeps it at a low temperature, improving its high-temperature resistance and ensuring the normal operation of the drilling tool, thus improving drilling efficiency. The internal pressure of the housing 1 prevents heat transfer from gas flow, thereby preventing the temperature of the drilling chip 3 from being transferred, which plays a role in heat insulation. Furthermore, the housing 1 and the heat insulation layer 4 can isolate the external temperature, preventing the external temperature from being transferred to the drilling chip 3, and also keep the interior of the chamber 2 at a low temperature, ensuring the stable operation of the drilling chip 3. At the same time, the drilling chip 3 can work in a high-temperature environment, making its working range flexible and adjustable.

[0052] Protection method examples:

[0053] This embodiment also proposes a method for protecting drilling chips, see [link to relevant documentation]. Figure 2 , Figure 2 A flowchart illustrating a method for protecting a drilling chip according to an embodiment of the present invention is shown. As illustrated, the method for protecting a drilling chip includes the following steps:

[0054] In the first heat exchange step S1, both drilling fluid and coolant are transported to the heat exchange device, where the drilling fluid and coolant exchange heat to cool the coolant.

[0055] Specifically, drilling fluid flows from the surface system through the inside of the drill pipe towards the drill bit, with a heat exchanger installed along its flow path. In this heat exchanger, the drilling fluid exchanges heat with a coolant, causing the coolant temperature to decrease and the drilling fluid temperature to increase. The heat exchanger then outputs the heated drilling fluid and the cooled coolant separately, with the output drilling fluid flowing towards the drill bit.

[0056] In specific implementation, the heat exchange device can be the first heat exchange device in the above system embodiment. For the specific implementation process of the first heat exchange device, please refer to the above description. This embodiment will not repeat it here.

[0057] In cooling step S2, the coolant after heat exchange is cooled down again.

[0058] Specifically, after the heat exchanger outputs the cooled liquid, the cooling device continues to cool the cooled liquid. In practice, the cooling device can be the same as the one in the above system embodiment. For details on the specific implementation process of the cooling device, please refer to the above description. This embodiment will not repeat the details here.

[0059] In the second heat exchange step S3, the cooled coolant is delivered into the chamber to cool the drilling chip inside the chamber.

[0060] Specifically, the cooled coolant is transported to the chamber 2 in the above system embodiment. The chamber 2 is equipped with a drilling chip. The cooled coolant exchanges heat with the drilling chip in the chamber 2, which raises the temperature of the coolant and lowers the temperature of the drilling chip, thus achieving cooling of the drilling chip.

[0061] In specific implementation, the cabin 2 is set inside the drilling chip protection system in the above system embodiment. For the specific implementation process of the drilling chip protection system, please refer to the above description. This embodiment will not repeat it here.

[0062] In processing step S4, the coolant that has been heated by heat exchange with the drilling chip is transported to the heat exchange device.

[0063] Step S5: Detect the temperature of the drilling chip. When the detected temperature of the drilling chip is greater than or equal to the preset operating temperature, repeat the above steps, i.e., repeat the first heat exchange step S1, cooling step S2, second heat exchange step S3, and processing step S4. When the detected temperature of the drilling chip is lower than the preset operating temperature, cooling of the drilling chip can be stopped. The preset operating temperature is determined based on the drilling chip; that is, the preset operating temperature is different for different models of drilling chips. This embodiment does not impose any restrictions on this.

[0064] As can be seen, in this embodiment, after the drilling fluid and coolant exchange heat, the temperature of the coolant can be reduced. Then, the cooled coolant is further cooled and then transported to the chamber to exchange heat with the drilling chip. This not only makes full use of the temperature of the drilling fluid and improves energy efficiency, but also ensures that the coolant has a sufficiently low temperature, thereby cooling the drilling chip and improving its high-temperature resistance. This ensures the normal operation of the drilling tool, improves drilling efficiency, and allows the drilling chip to work in a high-temperature environment, making its working range flexible and adjustable.

[0065] In the above embodiments, the process may further include the following steps before the first heat exchange step S1:

[0066] Step S6: Detect the temperature of the drilling chip. When the temperature of the drilling chip is greater than or equal to the preset operating temperature, execute the first heat exchange step S1, the cooling step S2, the second heat exchange step S3, and the processing step S4 to cool the drilling chip. When the temperature of the drilling chip is lower than the preset operating temperature, delay for a preset time and continue detecting the temperature of the drilling chip. In specific implementation, the preset delay time can be determined according to the actual situation; this embodiment does not impose any restrictions on it.

[0067] Step S7: Check the temperature of the drilling chip again.

[0068] When the temperature of the drilling chip is greater than or equal to the preset operating temperature, repeat the first heat exchange step S1, the cooling step S2, the second heat exchange step S3, the processing step S4 and the step S7 to cool down the drilling chip until the temperature of the drilling chip is lower than the preset operating temperature and then stop cooling down the drilling chip.

[0069] Specifically, when the temperature of the drilling chip is greater than or equal to the preset operating temperature, the first heat exchange step S1, the cooling step S2, the second heat exchange step S3, the processing step S4, and the step S7 are repeated continuously, that is, the drilling chip is continuously cooled until the temperature of the drilling chip is detected to be lower than the preset operating temperature, at which point the cooling of the drilling chip is stopped. The preset operating temperature is set based on the rated temperature of the drilling chip, and the preset operating temperature is not exactly the same for each drilling chip.

[0070] As can be seen, in this embodiment, determining whether to cool the drilling chip based on a comparison between the temperature of the drilling chip and the preset operating temperature not only effectively cools the drilling chip but also avoids energy waste caused by continuously cooling the drilling chip when its temperature is below the preset operating temperature.

[0071] Processing step S4 further includes:

[0072] In the heating sub-step S41, the coolant that has been heated by heat exchange with the drilling chip is pressurized and heated.

[0073] Specifically, after the coolant exchanges heat with the drilling chip and is heated, it is delivered to the compressor, which pressurizes and heats the coolant.

[0074] Output sub-step S42, which delivers the pressurized and heated coolant to the heat exchange device.

[0075] In the aforementioned cooling step S2, the coolant after heat exchange and cooling is depressurized and cooled. Specifically, the coolant output from the heat exchange device still has a certain pressure, and its temperature can be lowered by reducing the pressure of the coolant. More specifically, an inlet pipe can be provided between the heat exchange device and the chamber 2. The inlet pipe is used to transport the cooled coolant into the chamber 2 for heat exchange with the drilling chip. Preferably, a pressure-reducing valve is provided on the inlet pipe to release pressure from the coolant. During the pressure release process, the temperature of the coolant will also decrease significantly.

[0076] See Figure 3 The protection method for drilling chips includes the following steps:

[0077] In the first heat exchange step S1, both drilling fluid and coolant are transported to the heat exchange device for heat exchange.

[0078] Cooling step S2 involves cooling the coolant after heat exchange.

[0079] In the second heat exchange step S3, the cooled coolant is delivered into the chamber to cool the drilling chip inside the chamber.

[0080] In the heating sub-step S41, the coolant that has been heated by heat exchange with the drilling chip is pressurized and heated.

[0081] Output sub-step S42, which delivers the pressurized and heated coolant to the heat exchange device.

[0082] When the temperature of the drilling chip is detected to be greater than or equal to the preset operating temperature, repeat the first heat exchange step S1, the cooling step S2, the second heat exchange step S3, the heating sub-step S41, and the output sub-step S42.

[0083] In specific implementation, the specific implementation process of the first heat exchange step S1, the cooling step S2, and the second heat exchange step S3 can be referred to the above description, and will not be repeated here in this embodiment.

[0084] As can be seen, in this embodiment, by increasing the pressure and temperature of the coolant after heat exchange with the drilling chip, the heat exchange effect between the coolant and the drilling fluid can be greatly improved, allowing the coolant to cool down better. Then, by depressurizing the coolant after heat exchange and cooling, the temperature of the coolant is further reduced, improving the heat exchange efficiency between the coolant and the drilling chip and ensuring the low temperature of the drilling chip.

[0085] In the above embodiments, there are two heat exchange devices, and the drilling fluid and coolant exchange heat sequentially through the two heat exchange devices. Specifically, the two heat exchange devices can be the first heat exchange device and the second heat exchange device in the above system embodiments. The specific implementation process of the first heat exchange device and the second heat exchange device can be referred to the above description, and will not be repeated here. In this way, the heat exchange efficiency between the coolant and the drilling fluid can be effectively improved by using two heat exchange devices, making full use of the temperature of the drilling fluid, so that the coolant is reduced to a certain temperature, which is convenient for subsequent cooling of the drilling chip.

[0086] In the above embodiments, before the first heat exchange step S1, the drilling fluid can first pass through the generator, which uses the pressure of the drilling fluid to generate electricity. As the pressure of the drilling fluid decreases, the temperature of the drilling fluid will also decrease. The lower-temperature drilling fluid is then transported to the heat exchange device to exchange heat with the coolant.

[0087] In summary, in this embodiment, after the drilling fluid and coolant exchange heat, the temperature of the coolant can be reduced. Then, the cooled coolant is further cooled before being transported into the chamber to exchange heat with the drilling chip. This not only makes full use of the temperature of the drilling fluid and improves energy efficiency, but also ensures that the coolant has a sufficiently low temperature, thereby cooling the drilling chip and improving its high-temperature resistance, thus improving drilling efficiency. Furthermore, the drilling chip can work in high-temperature environments, making its working range flexible and adjustable.

[0088] Control method example:

[0089] This embodiment also proposes a protection and control method for drilling chips, see [link to relevant documentation]. Figure 4 , Figure 4 A flowchart of a protection and control method for a drilling chip provided in an embodiment of the present invention is shown. As illustrated, the protection and control method for the drilling chip includes the following steps:

[0090] Detection step S1: Detect the temperature of the drilling chip; wherein the drilling chip is disposed in the chamber of the drilling chip protection system in the above system embodiment.

[0091] Specifically, a temperature sensor can be installed inside the cabin 2, which can detect the temperature of the drilling chip 3 in real time.

[0092] The specific implementation process of the protection system for the drilling chip can be found in the above description, and will not be repeated here.

[0093] In adjustment step S2, the temperature of the drilling chip is compared with a preset operating temperature. If the temperature of the drilling chip is greater than or equal to the preset operating temperature, the drilling chip is cooled by a cooling device. If the temperature of the drilling chip is lower than the preset operating temperature, the detection step S1 and adjustment step S2 are repeated after a preset time delay. The preset time delay can be determined according to actual conditions, and this embodiment does not impose any restrictions on it.

[0094] Specifically, see Figure 1 When the temperature of the drilling chip is greater than or equal to the preset operating temperature, the cooling device 5 supplies coolant to the chamber 2. The drilling chip 3 exchanges heat with the coolant, causing the temperature of the drilling chip 3 to decrease and the temperature of the coolant to increase. The heated coolant is then output. More specifically, the coolant is supplied to the chamber 2 through the input pipe 7, which passes through the top wall of the housing 1 and is connected to the chamber 2. The heated coolant is output through the output pipe 6. The first end of the output pipe 6 is connected to the chamber 2 to receive the heated coolant, and the output pipe 6 passes through the bottom wall of the housing 1, with its second end located outside the housing 1 to output the heated coolant.

[0095] The cooling device 5 may include a compressor 53, a first heat exchanger 51, and a mud pump. The mud pump is used to extract drilling fluid. The first inlet of the first heat exchanger 51 is connected to the outlet of the mud pump, and the first inlet of the first heat exchanger 51 is used to receive the drilling fluid output by the mud pump. The second inlet of the first heat exchanger 51 is connected to the chamber 2 via the compressor 53 and the output pipe 6. Specifically, the chamber 2 is connected to the first end of the output pipe 6, the second end of the output pipe 6 is connected to the inlet of the compressor 53, and the outlet of the compressor 53 is connected to the second inlet of the first heat exchanger 51. The coolant in the chamber 2, after heat exchange and heating with the drilling chip 3, is transported to the compressor 53 via the output pipe 6. The compressor 53 pressurizes and heats the coolant, and then transports the pressurized and heated coolant to the first heat exchanger 51.

[0096] Inside the first heat exchange device 51, the pressurized and heated coolant exchanges heat with the drilling fluid, causing the temperature of the coolant to decrease and the temperature of the drilling fluid to increase. The first outlet of the first heat exchange device 51 is used to output the heated drilling fluid after heat exchange. The second outlet of the first heat exchange device 51 is connected to the cabin 2 through the input pipe 7. The second outlet of the first heat exchange device 51 is used to transport the cooled coolant after heat exchange into the cabin 2 for heat exchange with the drilling chip 3.

[0097] In specific implementation, the input pipe 7 can be equipped with a pressure-reducing valve to depressurize the coolant, further reducing its temperature. The input pipe 7 then delivers the depressurized and cooled coolant into the chamber. Of course, according to the above system embodiment, the cooling device may also include a second heat exchange device 54 and a generator 55. Specific configurations and implementation methods are detailed above and will not be repeated here.

[0098] In adjustment step S2, when the temperature of the drilling chip is greater than or equal to the preset operating temperature, the flow rate of the coolant and / or the flow rate of the drilling fluid are increased to allow the coolant and drilling fluid to exchange heat, thereby cooling the drilling chip through the coolant.

[0099] Preferably, increasing the coolant flow rate is achieved by increasing the power of the compressor, and increasing the drilling fluid flow rate is achieved by increasing the power of the mud pump.

[0100] Specifically, participate in Figure 5 The adjustment step S2 further includes:

[0101] In the coolant flow rate regulation sub-step S21, the temperature of the drilling chip is compared with the preset operating temperature. When the temperature of the drilling chip is greater than or equal to the preset operating temperature, the power of the compressor is increased to increase the coolant flow rate. After increasing the power of the compressor, the temperature of the drilling chip is detected again, and the detected temperature is compared with the previously detected temperature. When the detected temperature is greater than or equal to the previously detected temperature, the power of the compressor is increased further.

[0102] In drilling fluid flow rate first adjustment sub-step S22, coolant flow rate adjustment sub-step S21 is repeated until the compressor power increases to the maximum power, and the temperature of the drilling chip detected this time is still greater than or equal to the temperature of the drilling chip detected last time, the power of the mud pump is increased to increase the drilling fluid flow rate.

[0103] In practice, when the temperature of the drilling chip is lower than the preset operating temperature, after a preset delay, the temperature of the drilling chip is re-detected and compared with the preset operating temperature, and then the above operation is repeated.

[0104] In practice, after increasing the compressor power and delaying for a preset time, the temperature of the drilling chip is detected again. If the detected temperature is lower than the previously detected temperature, it is compared with the preset operating temperature. If the detected temperature is higher than the preset operating temperature, the detection step S1 and adjustment step S2 are restarted. If the detected temperature is lower than or equal to the preset operating temperature, the system returns to standby mode, and the detection step S1 and adjustment step S2 are repeated.

[0105] If the temperature of the drilling chip detected this time is greater than or equal to the temperature of the drilling chip detected in the previous time, then it is determined whether the compressor power has been increased to the maximum power. If it has not been increased to the maximum power, the compressor power is increased again, and the above operation is repeated. If the compressor power is increased to the maximum power, then the power of the mud pump is increased.

[0106] In the second sub-step S23 of the drilling fluid flow rate regulation, after increasing the power of the mud pump, the temperature of the drilling chip is detected again, and compared with the previously detected temperature. If the detected temperature is greater than or equal to the previously detected temperature, the power of the mud pump is further increased. This second sub-step S23 is repeated until the power of the mud pump reaches its maximum. An alarm is triggered when the power of the mud pump reaches its maximum. After the alarm, the protection system of the drilling chip stops working, records and saves the data, and then enters a sleep state.

[0107] In practice, after increasing the power of the mud pump, if the temperature of the drilling chip detected this time is greater than or equal to the temperature of the drilling chip detected last time, and when it is determined that the power of the compressor has reached the maximum power, the power of the mud pump is further increased; the above operation is repeated, and if the temperature of the drilling chip detected this time is greater than or equal to the temperature of the drilling chip detected last time, and the power of the compressor and the power of the mud pump have both reached the maximum power, an alarm is triggered.

[0108] Figure 5 In the diagram, T0 represents the preset operating temperature of the drilling chip, T1 represents the temperature at which the drilling chip was first detected, and T2 represents the temperature at which the drilling chip was detected after increasing the compressor power. In subsequent steps, when comparing T2 with T1, the temperatures of T2 and T1 are continuously changing; that is, T1 represents the previously detected temperature of the drilling chip, and T2 represents the temperature at which the drilling chip is detected this time. Figure 5The preset delay time is designed to reduce the frequency of control operations and to determine the next step by continuously comparing the temperature of the drilling chip in the current drilling operation with that in the previous drilling operation. In practice, the preset delay time can be determined according to the actual situation, and this embodiment does not impose any restrictions on it.

[0109] In practical implementation, this control method can include a controller that is electrically connected to the temperature sensor, compressor, and mud pump. Specifically, the controller can be electrically connected via wiring or wireless communication. The controller receives the temperature of the drilling chip detected by the temperature sensor and adjusts the power of the compressor and the mud pump.

[0110] It should be noted that the protection system, protection method and protection control method of the drilling chip in this invention are based on the same principle, and related parts can be referred to each other.

[0111] In summary, in this embodiment, cooling the drilling chip using a cooling device keeps it at a low temperature, improving its high-temperature resistance and ensuring the normal operation of the drilling tool, thus increasing drilling efficiency. Furthermore, the cooling device lowers the coolant temperature through heat exchange between the drilling fluid and the coolant, fully utilizing the drilling fluid's temperature while simultaneously cooling the coolant, facilitating the cooling of the drilling chip. Additionally, increasing the power of the compressor and mud pump increases the flow rates of both the coolant and drilling fluid, thereby enhancing the heat exchange effect between them and effectively ensuring the cooling of the drilling chip.

[0112] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A protection system for a drilling chip, characterized by The protection system comprises a shell (1), a cabin (2), a cooling device (5) and a heat insulation layer (4); wherein, the inside of the shell (1) is in a negative pressure state, the cabin (2) is arranged in the shell (1), and a drilling chip (3) is arranged in the cabin (2); the cooling device (5) is arranged outside the shell (1) and is used for conveying cooling liquid with a preset temperature to the cabin (2), exchanging heat between the cooling liquid and the drilling chip (3) to cool the drilling chip (3), and outputting the cooling liquid after heat exchange; the temperature of the cooling liquid is lower than the temperature of the drilling chip (3); the heat insulation layer (4) is arranged on the outer wall of the shell (1); the cooling device (5) comprises a first heat exchange device (51) and a cooling device (52); wherein, the first heat exchange device (51) and the cooling device (52) are arranged on the same side of the shell (1), a first inlet of the first heat exchange device (51) is used for receiving drilling fluid, a second inlet of the first heat exchange device (51) is connected with the cabin (2) through an output pipe (6) to receive the cooling liquid after heat exchange with the drilling chip, a first outlet of the first heat exchange device (51) is used for outputting the drilling fluid after heat exchange with the cooling liquid, and a second outlet of the first heat exchange device (51) is connected with the cabin (2) through the cooling device (52) and an input pipe (7); the cooling device (52) is used for cooling the cooling liquid after heat exchange with the drilling fluid and conveying the cooling liquid after cooling into the cabin (2). The cooling device (5) further comprises:

2. The protection system for a drilling chip as claimed in claim 1, characterized in that, a compressor (53) arranged on the other side of the shell (1), an inlet of the compressor (53) is connected with the output pipe (6) to receive the cooling liquid after heat exchange with the drilling chip, and an outlet of the compressor (53) is connected with the second inlet of the first heat exchange device (51) to convey the cooling liquid after pressure increase and temperature increase to the first heat exchange device (51); and / or, a generator (55), an inlet of the generator (55) is used for receiving the drilling fluid, and an outlet of the generator (55) is connected with the first inlet of the first heat exchange device (51).

3. The protection system of the drilling chip according to claim 2, wherein, the first heat exchange device (51) is a condenser; and / or, the cooling device (52) is a pressure reducing valve, and the pressure reducing valve is arranged on the input pipe (7). The cooling device (5) further comprises a second heat exchange device (54); wherein, 4. The protection system for a drilling chip as claimed in claim 2, characterized in that, ​ The second heat exchange device (54) is arranged outside the heat insulation layer (4), a first inlet of the second heat exchange device (54) is connected with an outlet of the compressor (53), a second inlet of the second heat exchange device (54) is connected with a first outlet of the first heat exchange device (51), a first outlet of the second heat exchange device (54) is connected with a second inlet of the first heat exchange device (51) to deliver the cooled cooling liquid to the first heat exchange device (51), and a second outlet of the second heat exchange device (54) is used to output the heated drilling fluid.

5. A method for protecting a drilling chip using the protection system of claim 1 to 4, characterized by, The method comprises the following steps: A first heat exchange step, wherein the drilling fluid and the cooling liquid are delivered into the heat exchange device, and the drilling fluid and the cooling liquid are heat exchanged to cool the cooling liquid; A cooling step, wherein the cooled cooling liquid is cooled again; A second heat exchange step, wherein the cooled cooling liquid is delivered into the cabin to cool the drilling chip in the cabin; A processing step, wherein the heated cooling liquid after heat exchange with the drilling chip is delivered into the heat exchange device; The above steps are repeated when the temperature of the drilling chip is greater than or equal to the preset working temperature.

6. The method of protecting a drilling chip as claimed in claim 5, wherein, The first heat exchange step further comprises the following steps: Detecting the temperature of the drilling chip, and performing the first heat exchange step, the cooling step, the second heat exchange step and the processing step to cool the drilling chip when the temperature of the drilling chip is greater than or equal to the preset working temperature; Detecting the temperature of the drilling chip again, and repeating the first heat exchange step, the cooling step, the second heat exchange step and the processing step when the temperature of the drilling chip is greater than or equal to the preset working temperature, until the temperature of the drilling chip is less than the preset working temperature.

7. The method of protecting a drilling chip as claimed in claim 5, wherein, The processing step comprises the following steps: A heating sub-step, wherein the heated cooling liquid after heat exchange with the drilling chip is boosted and heated; An output sub-step, wherein the boosted and heated cooling liquid is delivered into the heat exchange device; In the cooling step, the cooled cooling liquid is de-boosted and cooled.

8. A protection control method of a drilling chip, characterized by, The method comprises the following steps: A detecting step, wherein the temperature of the drilling chip is detected; and wherein the drilling chip is arranged in the cabin of the drilling chip protection system according to any one of claims 1 to 4; An adjusting step, wherein the temperature of the drilling chip is compared with the preset working temperature, and the drilling chip is cooled by the cooling device when the temperature of the drilling chip is greater than or equal to the preset working temperature; The detecting step and the adjusting step are repeated after a preset time delay when the temperature of the drilling chip is less than the preset working temperature.

9. The drilling chip protection control method according to claim 8, wherein In the adjusting step, the flow rate of the cooling liquid and / or the flow rate of the drilling fluid are increased to heat exchange the cooling liquid and the drilling fluid when the temperature of the drilling chip is greater than or equal to the preset working temperature, so that the drilling chip is cooled by the cooling liquid.

10. The method of claim 9, wherein, The adjusting step comprises the following steps: The cooling liquid flow rate adjusting sub-step compares the temperature of the drilling chip with a preset working temperature, and when the temperature of the drilling chip is greater than or equal to the preset working temperature, the power of the compressor is increased to increase the flow rate of the cooling liquid; the temperature of the drilling chip is detected again, and when the detected temperature of the drilling chip is greater than or equal to the temperature of the drilling chip detected last time, the power of the compressor is continuously increased; The drilling fluid flow rate first adjusting sub-step repeats the cooling liquid flow rate adjusting sub-step, and when the power of the compressor is increased to the maximum power, the power of the mud pump is increased to increase the flow rate of the drilling fluid; The drilling fluid flow rate second adjusting sub-step detects the temperature of the drilling chip again, and when the detected temperature of the drilling chip is greater than or equal to the temperature of the drilling chip detected last time, the power of the mud pump is continuously increased; the drilling fluid flow rate second adjusting sub-step is repeated, and when the power of the mud pump is increased to the maximum power.

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