Drilling fluid cooling device

Abstract

The utility model discloses a drilling fluid cooling device which comprises a heat exchange pipe and a cooling assembly, the heat exchange pipe comprises a plurality of heat exchange sections which are sequentially connected in the liquid flowing direction, and the heat exchange pipe is used for introducing drilling fluid; the cooling assembly comprises a water tank and a plurality of cooling pipes, the multiple cooling pipes correspond to the multiple heat exchange sections one to one, each heat exchange pipe communicates with the water tank so that cooling liquid can be conveyed to the multiple heat exchange pipes through the water tank, each heat exchange pipe is arranged on the periphery of the corresponding heat exchange section, and the cooling liquid can be conveyed to the multiple heat exchange pipes through the water tank. And therefore, the cooling liquid in the heat exchange pipe exchanges heat with the drilling fluid in the heat exchange section. Heat exchange can be efficiently carried out, a good heat exchange effect is achieved, drilling fluid does not need to be circulated for multiple times, the heat exchange time is greatly shortened, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas well drilling technology, and specifically to a drilling fluid cooling device. Background Technology

[0002] Drilling fluid is a general term for various circulating fluids used in the drilling process to assist in drilling. Drilling fluid has multiple uses, such as well washing and cooling downhole drilling equipment. During drilling, the drilling fluid flows from the surface to the well and back again. Due to the higher temperature downhole, the temperature of the drilling fluid rises as it flows underground. When the drilling fluid flows back to the surface, it needs to be cooled to prevent the high temperature from affecting the downhole drilling equipment.

[0003] Patent CN213515202U discloses a drilling fluid circulation cooling device and a drilling fluid circulation system. The drilling fluid cooling heat exchange device includes a heat exchange box, a drilling fluid circulation chamber, a coolant circulation chamber, heat exchange pipes, and a drilling fluid flow pipe. The drilling fluid circulation chamber and the coolant circulation chamber are arranged side by side in the heat exchange box, and the two ends of the heat exchange pipes are located in the drilling fluid circulation chamber and the coolant circulation chamber, respectively. The drilling fluid flow pipe is connected in series with the drilling fluid circulation chamber to form a drilling fluid self-circulation channel.

[0004] In order to ensure the cooling effect of drilling fluid, the existing technology connects the drilling fluid flow pipe and the drilling fluid circulation chamber in series to form a drilling fluid self-circulation channel, so that the drilling fluid circulates and undergoes multiple cooling and heat exchange processes. However, the drilling fluid needs to undergo multiple circulation heat exchange processes, resulting in a long overall heat exchange time and affecting the overall heat exchange efficiency. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a drilling fluid cooling device to solve the technical problem that existing drilling fluids need to undergo multiple circulation heat exchange, resulting in a long overall heat exchange time and affecting the overall heat exchange efficiency.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a drilling fluid cooling device, comprising:

[0008] A heat exchange tube, comprising multiple heat exchange sections connected sequentially along the liquid flow direction, wherein the heat exchange tube is used to introduce drilling fluid; and

[0009] The cooling assembly includes a water tank and multiple cooling pipes, each of which corresponds to a heat exchange section. Each heat exchange pipe is connected to the water tank to deliver coolant to the multiple heat exchange pipes through the water tank. Each heat exchange pipe is located on the outer periphery of the corresponding heat exchange section so that the coolant in the heat exchange pipe exchanges heat with the drilling fluid in the heat exchange section.

[0010] In some embodiments, the heat exchange tube includes a plurality of connecting tubes and two connectors. The plurality of connecting tubes are arranged at intervals in a horizontal direction. The two ends of each connecting tube are respectively connected to the two connectors. Each connector has a channel that connects the beginning and end of two adjacent connecting tubes. One connector also has an inlet that connects to the beginning end of one of the plurality of connecting tubes, and the other connector also has an outlet that connects to the end of the other of the plurality of connecting tubes. The connecting tubes constitute the heat exchange section.

[0011] In some embodiments, the connecting pipe and the connecting member are detachably connected.

[0012] In some embodiments, the connector includes a housing and a cover plate. The housing has a plurality of spaced-apart grooves, and the cover plate is detachably connected to cover the openings of the plurality of grooves. The cover plate and the housing together form the channel.

[0013] In some embodiments, the heat exchange tube includes a plurality of connecting tubes, the inlet of the connecting tube is connected to the outlet of an adjacent connecting tube through a bend, the connecting tube and the bend are detachably connected, and the connecting tube constitutes the heat exchange section.

[0014] In some embodiments, the diameter of the cooling pipe is larger than the diameter of the heat exchange pipe, the cooling pipe is sleeved on the outer periphery of the heat exchange section, the two ends of the cooling pipe are sealed to the outer side wall of the heat exchange section, and a heat exchange cavity is formed between the cooling pipe and the heat exchange section, and the heat exchange cavity is in communication with the water tank.

[0015] In some embodiments, a baffle is provided in the heat exchange cavity, and the baffle is spirally arranged along the axial direction of the heat exchange cavity to divide the heat exchange cavity into spirally arranged heat exchange channels.

[0016] In some embodiments, the partition is disposed on the outer periphery of the heat exchange section, and mounting rings are provided on the outer periphery of both ends of the heat exchange section, the mounting rings being sealed to the inner wall of the cooling pipe.

[0017] In some embodiments, the cooling pipe is provided with an inlet and an outlet at opposite ends, which communicate with the heat exchange chamber;

[0018] The drilling fluid cooling device further includes a first manifold and a second manifold. The first manifold is connected to a plurality of the fluid inlets, and one end of the first manifold is connected to the water outlet of the water tank. The second manifold is connected to a plurality of the fluid drains, and one end of the second manifold is connected to the water inlet of the water tank.

[0019] In some embodiments, the diameter of the heat exchange tube is larger than the diameter of the cooling tube, and the cooling tube is spirally wound around the outer periphery of the heat exchange section.

[0020] Compared with the prior art, the drilling fluid cooling device provided by this utility model has a heat exchange tube divided into multiple heat exchange sections connected in sequence. Each heat exchange section is provided with a cooling pipe on its outer periphery, and each cooling pipe is connected to the water tank. That is to say, the multiple heat exchange sections are connected in series, while the multiple cooling pipes are connected in parallel. The temperature of the coolant entering the multiple cooling pipes is a relatively low initial temperature, so that the drilling fluid can exchange heat with the lower temperature coolant each time it passes through a heat exchange section. This allows for efficient heat exchange and has a better heat exchange effect. Furthermore, the drilling fluid does not need to be circulated multiple times, which greatly reduces the heat exchange time and improves the heat exchange efficiency.

[0021] The above description is merely an overview of the technical solution of this utility model. To better understand the technical means of this utility model and to enable its implementation according to the description, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an embodiment of the drilling fluid cooling device provided by this utility model;

[0023] Figure 2 yes Figure 1 Front view of the drilling fluid cooling unit;

[0024] Figure 3 yes Figure 1 Cross-sectional view of the drilling fluid cooling unit;

[0025] Figure 4 yes Figure 1 Cross-sectional view of the connecting pipe and cooling pipe;

[0026] Figure 5 yes Figure 1 A partial schematic diagram of the connecting pipe and cooling pipe.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Heat exchange tube, 11-Connecting tube, 111-Mounting ring platform, 12-Connector, 121-Shell, 1211-Groove, 122-Cover plate, 2-Cooling assembly, 21-Cooling tube, 211-Heat exchange chamber, 22-Baffle plate, 23-First manifold, 24-Second manifold. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] To address the technical problem that existing drilling fluids require multiple circulations for heat exchange, resulting in long overall heat exchange times and reduced overall heat exchange efficiency, this invention provides a drilling fluid cooling device. The drilling fluid can exchange heat with a lower-temperature coolant each time it passes through a heat exchange section, thus achieving efficient heat exchange and a better heat exchange effect. Furthermore, the drilling fluid does not need to undergo multiple circulations, significantly reducing heat exchange time and improving heat exchange efficiency.

[0031] Please see Figure 1 , Figure 1 This is a schematic diagram of the drilling fluid cooling device in one embodiment of the present invention.

[0032] This utility model provides a drilling fluid cooling device, including a heat exchange pipe 1 and a cooling assembly 2. The heat exchange pipe 1 includes multiple heat exchange sections connected sequentially along the liquid flow direction, and the heat exchange pipe 1 is used to introduce drilling fluid. The cooling assembly 2 includes a water tank and multiple cooling pipes 21, each of the multiple cooling pipes 21 corresponding to one of the multiple heat exchange sections. Each heat exchange pipe 1 is connected to the water tank to deliver coolant to the multiple heat exchange pipes 1 through the water tank. Each heat exchange pipe 1 is located on the outer periphery of the corresponding heat exchange section so that the coolant in the heat exchange pipe 1 exchanges heat with the drilling fluid in the heat exchange section.

[0033] In this embodiment, please refer to Figures 1 to 3 The heat exchange tube 1 is divided into multiple heat exchange sections connected in sequence. Each heat exchange section is provided with a cooling pipe 21 on its outer periphery. Each cooling pipe 21 is connected to the water tank. That is, the multiple heat exchange sections are connected in series, while the multiple cooling pipes 21 are connected in parallel. The coolant entering the multiple cooling pipes 21 is at a relatively low initial temperature, so that the drilling fluid can exchange heat with the coolant at a lower temperature each time it passes through a heat exchange section. This allows for efficient heat exchange and a good heat exchange effect. Furthermore, the drilling fluid does not need to be circulated multiple times, which greatly reduces the heat exchange time and improves the heat exchange efficiency.

[0034] In this embodiment, please refer to Figures 1 to 3 The heat exchange tube 1 includes multiple connecting tubes 11 and two connectors 12. The multiple connecting tubes 11 are arranged at intervals in the horizontal direction. The two ends of each connecting tube 11 are respectively connected to the two connectors 12. Each connector 12 has a channel connecting the beginning and end of two adjacent connecting tubes 11. One connector 12 also has an inlet connecting the beginning of one of the multiple connecting tubes 11, and the other connector 12 also has an outlet connecting the end of the other connecting tube 11. The connecting tubes 11 constitute the heat exchange section.

[0035] Specifically, multiple connecting pipes 11 are arranged at intervals along the first direction, and two connecting members 12 are located at the upper and lower ends of the connecting pipes 11 respectively. The connecting member 12 is provided with multiple channels, and the multiple connecting pipes 11 are connected in series using the channels. This arrangement can reduce the height of the entire device and reduce the floor space occupied.

[0036] In this embodiment, the connecting pipe 11 and the connecting member 12 are detachably connected. This facilitates production and assembly, as well as subsequent cleaning and maintenance.

[0037] Specifically, the connecting pipe 11 is connected to the connecting member 12 via a pipe fitting.

[0038] In this embodiment, please refer to Figure 3 To facilitate cleaning of the channel within the connector 12, the connector 12 includes a housing 121 and a cover plate 122. The housing 121 has a plurality of spaced grooves 1211. The cover plate 122 is detachably connected to cover the openings of the plurality of grooves 1211. The cover plate 122 and the housing 121 together form the channel.

[0039] In another embodiment, the heat exchange tube 1 includes a plurality of connecting tubes 11, the inlet of the connecting tube 11 is connected to the outlet of the adjacent connecting tube 11 through a bend, the connecting tube 11 is detachably connected to the bend, and the connecting tube 11 constitutes the heat exchange section.

[0040] In this embodiment, please refer to Figures 3 to 5 The diameter of the cooling pipe 21 is larger than the diameter of the heat exchange pipe 1. The cooling pipe 21 is sleeved on the outer periphery of the heat exchange section. Both ends of the cooling pipe 21 are sealed to the outer wall of the heat exchange section. The cooling pipe 21 and the heat exchange section enclose a heat exchange cavity 211, which is connected to the water tank.

[0041] Specifically, both the cooling pipe 21 and the heat exchange section are linearly arranged, and the inner diameter of the cooling pipe 21 is much larger than the outer diameter of the heat exchange section, allowing the cooling pipe 21 to fit around the outer circumference of the heat exchange section. The cooling pipe 21 and the heat exchange section are coaxially arranged, and both ends of the cooling pipe 21 are sealed to the outer wall of the heat exchange section, forming a sealed heat exchange cavity 211 between the cooling pipe 21 and the heat exchange section. The heat exchange cavity 211 is connected to the water tank through a pipe, forming a circulation loop for the coolant. The coolant in the heat exchange cavity 211 can exchange heat with the drilling fluid in the heat exchange section, thereby reducing the drilling fluid level. Furthermore, since the heat exchange cavity 211 is annularly arranged, surrounding the entire circumference of the heat exchange section, the heat exchange area is increased, further improving the heat exchange effect.

[0042] In this embodiment, please refer to Figure 4 and Figure 5 In order to prolong the residence time of the coolant in the heat exchange chamber 211, a baffle 22 is provided in the heat exchange chamber 211. The baffle 22 is spirally arranged along the axial direction of the heat exchange chamber 211 to divide the heat exchange chamber 211 into spirally arranged heat exchange channels.

[0043] Specifically, the outer side of the partition 22 abuts against the inner wall of the cooling pipe 21, and the inner side of the partition 22 abuts against the outer wall of the heat exchange end. The partition 22 is spirally arranged, thereby forming a spiral heat exchange channel in the heat exchange chamber 211. The two ends of the heat exchange channel are connected to the water tank, and the coolant flows in the heat exchange channel. The spiral heat exchange channel can not only guide the flow of coolant, making the coolant flow around the circumference of the heat exchange section in a spiral, but also prolong the time that the coolant spends in the heat exchange chamber 211, ensuring sufficient heat exchange between the drilling fluid and the coolant, and further improving the heat exchange efficiency.

[0044] Furthermore, the specific installation form of the partition 22 is not limited. The partition 22 can be a single component that abuts against both the outer wall of the heat exchange section and the inner wall of the cooling pipe 21. Alternatively, the partition 22 can be fixedly installed on the inner wall of the cooling pipe 21 and integrally formed with the cooling pipe 21, with the inner side of the partition 22 abutting against the outer wall of the heat exchange section.

[0045] In this embodiment, please refer to Figure 5 The partition plate 22 is disposed on the outer periphery of the heat exchange section, and mounting rings 111 are provided on the outer periphery of both ends of the heat exchange section. The mounting rings 111 are sealed to the inner wall of the cooling pipe 21.

[0046] Specifically, the baffle 22 is fixedly installed on the outer wall of the heat exchange section. The baffle 22 is integrally formed with the heat exchange section. The outer side of the baffle 22 abuts against the inner wall of the cooling pipe 21. The cooling pipe 21 is a straight cylindrical structure with open ends. The inner diameter of the cooling pipe 21 is adapted to the mounting ring platform 111. The cooling pipe 21 is sleeved on the outer periphery of the heat exchange section, and its two ends correspond to and are sealed to the mounting ring platform 111. This arrangement facilitates production and assembly. Since the heat exchange between the coolant and the drilling fluid is achieved through heat transfer through the pipe wall of the heat exchange section, the side wall of the heat exchange section is essentially a heat-conducting element. In order to improve the heat exchange efficiency, by setting the baffle 22 on the outer wall of the heat exchange section, the surface area of ​​the outer wall of the heat exchange section can be increased, thereby increasing the contact area between the heat exchange section and the seawater and improving the heat exchange efficiency.

[0047] In this embodiment, please refer to Figure 1 and Figure 3 The cooling pipe 21 has an inlet and an outlet at opposite ends that connect to the heat exchange chamber 211; the drilling fluid cooling device also includes a first manifold 23 and a second manifold 24. The first manifold 23 is connected to multiple inlets and one end of the first manifold 23 is connected to the outlet of the water tank. The second manifold 24 is connected to multiple outlets and one end of the second manifold 24 is connected to the inlet of the water tank.

[0048] Specifically, multiple heat exchange sections are arranged at intervals along a first direction and extend vertically. The lower end of the cooling pipe 21 is provided with the liquid inlet, and the upper end of the cooling pipe 21 is provided with the liquid outlet. One end of the first manifold 23 is connected to the outlet of the water tank, and the other end is sealed. The body of the first manifold 23 is connected to the liquid inlet through a short pipe, thereby simultaneously supplying coolant to multiple cooling pipes 21 through the first manifold 23. One end of the second manifold 24 is connected to the inlet of the water tank, and the other end is sealed. The body of the second manifold 24 is connected to the liquid outlet through a short pipe, thereby transporting the coolant discharged from multiple cooling pipes 21 back to the water tank.

[0049] In another embodiment, the diameter of the heat exchange tube 1 is larger than the diameter of the cooling tube 21, and the cooling tube 21 is spirally wound around the outer periphery of the heat exchange section.

[0050] To better understand this utility model, the following is combined with... Figures 1 to 5 The technical solution of this utility model is described in detail below:

[0051] In practical use, the coolant in the water tank is pumped into multiple heat exchange chambers 211 through the first manifold 23 and flows along the heat exchange channel. The drilling fluid is delivered from the inlet of the connector 12 to the connecting pipe 11. The drilling fluid passes through multiple connecting pipes 11 in sequence and exchanges heat with the coolant in the heat exchange chambers 211 on the outer periphery of the connecting pipes 11. The drilling fluid can exchange heat with the coolant at a lower temperature each time it passes through a heat exchange section, thereby achieving efficient heat exchange and having a good heat exchange effect. Furthermore, the drilling fluid does not need to be circulated multiple times, which greatly reduces the heat exchange time and improves the heat exchange efficiency. The coolant flowing out of the heat exchange channel is delivered to the water tank through the second manifold 24.

[0052] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A drilling fluid cooling apparatus, characterized by, It comprises: A heat exchange pipe comprising a plurality of heat exchange sections connected in sequence along the liquid flow direction, the heat exchange pipe being used for being inserted into the drilling fluid; And A cooling assembly comprising a water tank and a plurality of cooling pipes, the plurality of cooling pipes corresponding to the plurality of heat exchange sections one by one, each heat exchange pipe being in communication with the water tank to respectively transport cooling liquid to the plurality of heat exchange pipes through the water tank, and each heat exchange pipe being arranged at the outer periphery of the corresponding heat exchange section to enable the cooling liquid in the heat exchange pipe to exchange heat with the drilling fluid in the heat exchange section.

2. The drilling fluid cooling apparatus of claim 1, wherein, The heat exchange pipe comprises a plurality of connecting pipes and two connecting pieces, the plurality of connecting pipes being arranged at intervals along the horizontal direction, the two ends of the connecting pipe being connected to the two connecting pieces respectively, the connecting piece being provided with a channel for communicating the leading end and the trailing end of the two adjacent connecting pipes, one of the connecting pieces being further provided with an inlet for communicating the leading end of the connecting pipe at one end of the plurality of connecting pipes, and the other connecting piece being further provided with an outlet for communicating the trailing end of the connecting pipe at the other end of the plurality of connecting pipes, the connecting pipe constituting the heat exchange section.

3. The drilling fluid cooling apparatus of claim 2, wherein, The connecting pipe and the connecting piece are detachably connected.

4. The drilling fluid cooling apparatus of claim 3, wherein, The connecting piece comprises a shell and a cover plate, the shell being provided with a plurality of grooves arranged at intervals, and the cover plate being detachably connected to the openings of the plurality of grooves, the cover plate and the shell enclosing the channel.

5. The drilling fluid cooling apparatus of claim 1, wherein, The heat exchange pipe comprises a plurality of connecting pipes, the inlet of the connecting pipe being connected to the outlet of the adjacent connecting pipe through an elbow pipe, the connecting pipe and the elbow pipe being detachably connected, and the connecting pipe constituting the heat exchange section.

6. The drilling fluid cooling apparatus of claim 1, wherein, The diameter of the cooling pipe is greater than the diameter of the heat exchange pipe, the cooling pipe being sleeved on the outer periphery of the heat exchange section, the two ends of the cooling pipe being sealingly connected to the outer side wall of the heat exchange section, a heat exchange cavity being enclosed between the cooling pipe and the heat exchange section, and the heat exchange cavity being in communication with the water tank.

7. The drilling fluid cooling apparatus of claim 6, wherein, A partition plate is arranged in the heat exchange cavity, the partition plate being arranged in a spiral shape along the axis of the heat exchange cavity to divide the heat exchange cavity into heat exchange flow channels arranged in a spiral shape.

8. The drilling fluid cooling apparatus of claim 7, wherein, The partition plate is arranged at the outer periphery of the heat exchange section, and mounting ring tables are arranged at the outer peripheries of the two ends of the heat exchange section, the mounting ring tables being sealingly connected to the inner wall of the cooling pipe.

9. The drilling fluid cooling apparatus of claim 6, wherein, Opposite ends of the cooling pipe are provided with a liquid inlet and a liquid outlet for communicating with the heat exchange cavity. The drilling fluid cooling device further comprises a first collecting pipe and a second collecting pipe, the first collecting pipe being connected to the plurality of liquid inlets, one end of the first collecting pipe being in communication with the water outlet of the water tank, the second collecting pipe being connected to the plurality of liquid outlets, and one end of the second collecting pipe being in communication with the water inlet of the water tank.

10. The drilling fluid cooling apparatus of claim 1, wherein, The diameter of the cooling pipe is greater than the diameter of the heat exchange pipe, and the cooling pipe is spirally wound on the outer periphery of the heat exchange section.

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