Slurry circulation system in vertical tunneling
By introducing a power generation and pressure reduction device into the mud circulation system, the pressure energy of the mud is converted into electrical energy, which solves the problems of energy dissipation and high power demand in traditional systems, and realizes the recycling of energy and cost reduction.
Patent Information
- Application Number
- CN202520280958.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-21
AI Technical Summary
Traditional mud systems waste energy when operating in high-pressure formations, and vertical tunneling equipment has high power requirements, especially in remote areas where power supply costs are high.
Design a mud circulation system including a mud inlet pipe, a mud outlet pipe, a connecting pipe, and a power generation and pressure reduction device. The power generation and pressure reduction device converts the mud pressure energy into electrical energy for the equipment's own use or for energy storage.
This enables the recycling of energy, reducing the power demand of equipment and the cost of power supply.
Smart Images
Figure CN223839119U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of vertical tunneling equipment, and in particular to a mud circulation system for vertical tunneling. Background Technology
[0002] In vertical tunneling, mud circulation systems are used to transport cuttings, stabilize the wellbore, and cool the drill bit. Traditional mud systems, when operating in high-pressure formations, require pressure-reducing valves or throttling devices to lower the mud pressure to prevent blowouts or wellbore instability. However, in existing technologies, the pressure differential energy generated during the pressure reduction process is typically dissipated as heat or vibration, resulting in energy waste. Furthermore, vertical tunneling equipment (such as shaft boring machines) has high power requirements, especially in remote areas where power supply costs are high.
[0003] Therefore, a mud circulation system is needed to solve the above problems in vertical tunneling. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a mud circulation system for vertical tunneling. This mud circulation system consists of an inlet pipe, an outlet pipe, a connecting pipe, and a power generation and pressure reduction device. The power generation and pressure reduction device converts the pressure energy of the mud into electrical energy for the equipment's own use or for energy storage, thereby achieving energy recycling.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] A mud circulation system for vertical tunneling includes a mud inlet pipe, a mud outlet pipe, a connecting pipe, and a power generation and pressure reduction device. The two ends of the connecting pipe are connected to the mud inlet pipe and the mud outlet pipe, respectively. The power generation and pressure reduction device is installed inside the connecting pipe. The connecting pipe consists of a first main channel, a second main channel, a first branch channel, a second branch channel, and a third branch channel. The first main channel is connected to the second main channel via the first branch channel, the second branch channel, and the third branch channel. The first branch channel and the second branch channel are arranged opposite to each other, and the third branch channel is located between the first branch channel and the second branch channel. The power generation and pressure reduction device includes a pressure reduction device and a power generation device. The pressure reduction device is installed at the connection point of the first main channel, the first branch channel, the second branch channel, and the third branch channel, and the power generation device is installed inside the first branch channel and the second branch channel.
[0007] The first main road, the second main road, and the third branch road are all vertically arranged. The first branch road and the second branch road each include a first horizontal section, a vertical section, and a second horizontal section. The two ends of the vertical section are respectively connected to the first horizontal section and the second horizontal section.
[0008] The pressure-reducing device includes a sealing block, springs, a fixing ring, and sealing columns. The sealing block is located at the junction of the first main channel, the first branch channel, the second branch channel, and the third branch channel. The fixing ring is located on the inner wall of the third branch channel. The sealing columns have at least two rings, connected by a circumferential connector within the same ring and by a radial connector between adjacent rings. The outermost ring of sealing columns is connected to the fixing ring. The sealing block has at least two rings of flow guide grooves, the number, position, and size of which correspond to the number, position, and size of the sealing columns. Multiple springs are arranged along the circumference of the sealing block and the fixing ring, with the top end of the spring connected to the bottom of the sealing block and the bottom end connected to the top of the fixing ring.
[0009] Both the sealing block and the sealing post have sealing rings on their outer periphery.
[0010] A first check valve and a second check valve are respectively provided on the first horizontal section and the second horizontal section.
[0011] The power generation device is located within the vertical section. The power generation device includes an upper cover, a lower cover, a rotor, a stator, a permanent magnet, and a rotating shaft. The two ends of the rotating shaft are rotatably connected to the centers of the upper cover and the lower cover, respectively. The rotor is fixed on the rotating shaft. The permanent magnet is located on the outer periphery of the rotor. The stator is fixed to the inner wall of the vertical section, and an armature winding is provided inside the stator. The upper cover, the lower cover, and the rotor are respectively provided with an upper cover guide groove, a lower cover guide groove, and a rotor guide groove. Each of the upper cover guide groove, the lower cover guide groove, and the rotor guide groove has several turns.
[0012] The inner side of the stator is provided with alternating first protrusions and first grooves, and the outer side of the permanent magnet is provided with alternating second protrusions and second grooves. The first protrusions cooperate with the second grooves, and the second protrusions cooperate with the second grooves.
[0013] The permanent magnet is provided with a rotating sealing ring on its outer periphery.
[0014] The slurry inlet pipe, the connecting pipe, and the slurry outlet pipe are all equipped with ultrasonic vibrators.
[0015] The inner walls of the slurry inlet pipe, the connecting pipe, and the slurry outlet pipe, as well as the exterior of the power generation and pressure reduction device, are all provided with a superhydrophobic coating.
[0016] The advantage of this invention is that it converts the pressure energy of mud into electrical energy for the equipment to use or for energy storage, thus realizing the recycling of energy. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the mud circulation system of this utility model;
[0018] Figure 2 for Figure 1 Cross-sectional view of AA in the middle;
[0019] Figure 3 for Figure 1 Cross-sectional view of BB in the middle;
[0020] Figure 4 for Figure 1 Cross-sectional view of CC in China;
[0021] Figure 5 for Figure 1 Cross-sectional view of DD in the middle;
[0022] Figure 6 for Figure 1 Cross-sectional view of the EE;
[0023] like Figures 1-6 As shown in the figure, the markings represent:
[0024] Connecting pipe 1, first main channel 11, second main channel 12, first branch channel 13, second branch channel 14, third branch channel 15, first one-way valve 16, second one-way valve 17, pressure reducing device 2, sealing block 21, sealing block guide groove 211, spring 22, fixing ring 23, sealing column 24, circumferential connector 25, radial connector 26, power generation device 3, upper cover 31, upper cover guide groove 311, lower cover 32, lower cover guide groove 321, rotor 33, rotor guide groove 331, stator 34, first protrusion 341, first groove 342, permanent magnet 35, second protrusion 351, second groove 352, rotating shaft 36. Detailed Implementation
[0025] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:
[0026] Example: Figures 1-6As shown, this embodiment relates to a mud circulation system in vertical tunneling, which mainly includes a mud inlet pipe, a mud outlet pipe, a connecting pipe 1, and a power generation and pressure reduction device. The two ends of the connecting pipe 1 are connected to the mud inlet pipe and the mud outlet pipe, respectively. The power generation and pressure reduction device is installed inside the connecting pipe 1 to reduce the pressure of the mud and generate electricity. The connecting pipe 1 consists of a first main channel 11, a second main channel 12, a first branch channel 13, a second branch channel 14, and a third branch channel 15. The first main channel 11 is connected to the second main channel 12 through the first branch channel 13, the second branch channel 14, and the third branch channel 15. The first branch channel 13 and the second branch channel 14 are arranged opposite to each other, and the third branch channel 15 is located between the first branch channel 13 and the second branch channel 14. The first main channel 11, the second main channel 12, and the third branch channel 15 are all arranged vertically. The first branch channel 13 and the second branch channel 14 each include a first horizontal section, a vertical section, and a second horizontal section. The two ends of the vertical section are connected to the first horizontal section and the second horizontal section, respectively. The first horizontal section and the second horizontal section are respectively equipped with a first one-way valve 16 and a second one-way valve 17. The first one-way valve 16 only allows mud to flow in (does not allow mud to flow out), and the second one-way valve 17 only allows mud to flow out (does not allow mud to flow in).
[0027] like Figures 1-6 As shown, the power generation and pressure reduction device includes a pressure reduction device 2 and a power generation device 3. The pressure reduction device 2 is installed at the connection between the first main road 11, the first branch road 13, the second branch road 14 and the third branch road 15, and the power generation device 3 is installed in the first branch road 13 and the second branch road 14.
[0028] The pressure-reducing device 2 includes a sealing block 21, springs 22, a fixing ring 23, and sealing posts 24. The sealing block 21 is located at the junction of the first main channel 11, the first branch channel 13, the second branch channel 14, and the third branch channel 15. The fixing ring 23 is located on the inner wall of the third branch channel 15. The sealing posts 24 have two rings, connected by a circumferential connector 25 within the same ring and by a radial connector 26 between adjacent rings. The outermost sealing post 24 is connected to the fixing ring 23. The sealing block 21 has two rings of sealing block guide grooves 211, the number, position, and size of which correspond to the number, position, and size of the sealing posts 24. Multiple springs 22 are arranged circumferentially along the sealing block 21 and the fixing ring 23. The top end of the spring 22 is connected to the bottom of the sealing block 21, and the bottom end is connected to the top of the fixing ring 23. Sealing rings are provided on the outer periphery of both the sealing block 21 and the sealing posts 24 for sealing. When the mud pressure is low, spring 22 is compressed (to a small degree). At this time, the first horizontal section is completely closed by the sealing block 21, while the sealing block guide channel 211 is not blocked by the blocking column 24. The mud can enter the third branch channel 15 through the sealing block guide channel 211. When the mud pressure is high, spring 22 is compressed (to a greater degree). At this time, the first horizontal section is partially closed by the sealing block 21 or not closed by the sealing block 21 at all. The sealing block guide channel 211 is blocked by the blocking column 24. The mud cannot enter the third branch channel 15 through the sealing block guide channel 211, but the mud can enter the first horizontal section and enter the vertical section through the first one-way valve 16.
[0029] The power generation device 3 is located in the vertical section. The power generation device 3 includes an upper cover 31, a lower cover 32, a rotor 33, a stator 34, a permanent magnet 35, and a rotating shaft 36. The two ends of the rotating shaft 36 are rotatably connected to the center of the upper cover 31 and the lower cover 32, respectively. The rotor 33 is fixed on the rotating shaft 36. The permanent magnet 35 is located on the outer periphery of the rotor 33. The stator 34 is fixed on the inner wall of the vertical section and has an armature winding inside. The upper cover 31, the lower cover 32, and the rotor 33 are respectively provided with an upper cover guide groove 311, a lower cover guide groove 321, and a rotor guide groove 331. The upper cover guide groove 311, the lower cover guide groove 321, and the rotor guide groove 331 are respectively provided with two turns, two turns, and one turn. The upper cover guide groove 311, the lower cover guide groove 321, and the rotor guide groove 331 are each provided with at least two turns in the vertical direction. The inner side of the stator 34 is alternately provided with a first protrusion 341 and a first groove 342, and the outer side of the permanent magnet 35 is alternately provided with a second protrusion 351 and a second groove 352. The first protrusion 341 and the second groove 352 cooperate with each other. A rotating sealing ring is provided on the outer periphery of the permanent magnet 35 for sealing. The slurry passes through the upper cover guide groove 311, the rotor guide groove 331 and the lower cover guide groove 321 in sequence, forming eddies, which realizes the rotation of the rotor 33 (permanent magnet 35), thereby realizing power generation. The second one-way valve 17 is designed to prevent mud from entering the second horizontal section from the third branch 15, and to facilitate the outflow of mud from the second horizontal section. Specifically, when the mud pressure flowing out of the first branch 13 and the second branch 14 is low, the mud flowing out of the first branch 13 and the second branch 14 can directly enter the second main channel 12; when the mud pressure flowing out of the first branch 13 and the second branch 14 is still high, the mud flowing out of the first branch 13 and the second branch 14 can be flushed to further reduce the mud pressure.
[0030] In addition, ultrasonic vibrators are installed on the inlet pipe, connecting pipe 1, and outlet pipe. These ultrasonic vibrators can be installed on the outer or inner walls of the inlet pipe, connecting pipe 1, and outlet pipe, or simultaneously on both. By injecting clean water into the inlet pipe and simultaneously turning on the ultrasonic vibrators, the inlet pipe, connecting pipe 1, outlet pipe, and power generation and pressure reduction device can be cleaned. The inner walls of the inlet pipe, connecting pipe 1, and outlet pipe, as well as the exterior of the power generation and pressure reduction device, are coated with a superhydrophobic coating to reduce mud adhesion.
[0031] like Figures 1-6 As shown, this embodiment also has the following working method:
[0032] The mud enters the connecting pipe 1 from the inlet pipe and then enters the outlet pipe through the connecting pipe 1, forming a circulation.
[0033] When the mud enters the connecting pipe 1, the following two flow paths will occur:
[0034] The first flow path: the first horizontal section is completely closed by the sealing block 21, while the sealing block guide channel 211 is not blocked by the sealing column 24. The mud enters the third branch channel 15 through the sealing block guide channel 211, and finally enters the slurry outlet pipe through the second main channel 12.
[0035] The second flow path: The first horizontal section is partially closed by the sealing block 21 or completely unclosed by the sealing block 21, while the sealing block guide channel 211 is blocked by the blocking column 24. The mud cannot enter the third branch channel 15 through the sealing block guide channel 211, but the mud can enter the first horizontal section and enter the vertical section through the first one-way valve 16. The mud passes through the upper cover guide channel 311, the rotor guide channel 331 and the lower cover guide channel 321 in sequence, forming a vortex, realizing the rotation of the rotor 33 (permanent magnet 35), thereby realizing power generation. The mud enters the second horizontal section and enters the second main channel 12 through the second one-way valve 17. It then enters the slurry outlet pipe through the second main channel 12. When the mud enters the second main channel 12 through the second one-way valve 17, the following two situations may occur: a) the mud flowing out of the first branch channel 13 and the second branch channel 14 directly enters the second main channel 12; b) the mud flowing out of the first branch channel 13 and the second branch channel 14 is flushed against each other before entering the second main channel 12.
[0036] The beneficial technical effect of this embodiment is that it converts the pressure energy of mud into electrical energy for the equipment to use or for energy storage, thereby realizing the recycling of energy.
[0037] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.
Claims
1. A mud circulation system for vertical tunneling, characterized in that: The device includes an inlet pipe, an outlet pipe, a connecting pipe, and a power generation and pressure reduction device. The two ends of the connecting pipe are connected to the inlet pipe and the outlet pipe, respectively. The power generation and pressure reduction device is installed inside the connecting pipe. The connecting pipe consists of a first main channel, a second main channel, a first branch channel, a second branch channel, and a third branch channel. The first main channel communicates with the second main channel through the first branch channel, the second branch channel, and the third branch channel. The first branch channel and the second branch channel are arranged opposite to each other, and the third branch channel is located between the first branch channel and the second branch channel. The power generation and pressure reduction device includes a pressure reduction device and a power generation device. The pressure reduction device is installed at the connection point of the first main channel, the first branch channel, the second branch channel, and the third branch channel, and the power generation device is installed inside the first branch channel and the second branch channel.
2. The mud circulation system for vertical tunneling as described in claim 1, characterized in that: The first main road, the second main road, and the third branch road are all vertically arranged. The first branch road and the second branch road each include a first horizontal section, a vertical section, and a second horizontal section. The two ends of the vertical section are respectively connected to the first horizontal section and the second horizontal section.
3. The mud circulation system for vertical tunneling as described in claim 2, characterized in that: The pressure-reducing device includes a sealing block, springs, a fixing ring, and sealing columns. The sealing block is located at the junction of the first main channel, the first branch channel, the second branch channel, and the third branch channel. The fixing ring is located on the inner wall of the third branch channel. The sealing columns have at least two rings, connected by a circumferential connector within the same ring and by a radial connector between adjacent rings. The outermost ring of sealing columns is connected to the fixing ring. The sealing block has at least two rings of flow guide grooves, the number, position, and size of which correspond to the number, position, and size of the sealing columns. Multiple springs are arranged along the circumference of the sealing block and the fixing ring, with the top end of the spring connected to the bottom of the sealing block and the bottom end connected to the top of the fixing ring.
4. The mud circulation system for vertical tunneling as described in claim 3, characterized in that: Both the sealing block and the sealing post have sealing rings on their outer periphery.
5. A mud circulation system for vertical tunneling as described in claim 2, characterized in that: A first check valve and a second check valve are respectively provided on the first horizontal section and the second horizontal section.
6. The mud circulation system for vertical tunneling as described in claim 2, characterized in that: The power generation device is located within the vertical section. The power generation device includes an upper cover, a lower cover, a rotor, a stator, a permanent magnet, and a rotating shaft. The two ends of the rotating shaft are rotatably connected to the centers of the upper cover and the lower cover, respectively. The rotor is fixed on the rotating shaft. The permanent magnet is located on the outer periphery of the rotor. The stator is fixed to the inner wall of the vertical section, and an armature winding is provided inside the stator. The upper cover, the lower cover, and the rotor are respectively provided with an upper cover guide groove, a lower cover guide groove, and a rotor guide groove. Each of the upper cover guide groove, the lower cover guide groove, and the rotor guide groove has several turns.
7. A mud circulation system for vertical tunneling as described in claim 6, characterized in that: The inner side of the stator is provided with alternating first protrusions and first grooves, and the outer side of the permanent magnet is provided with alternating second protrusions and second grooves. The first protrusions cooperate with the second grooves, and the second protrusions cooperate with the second grooves.
8. A mud circulation system for vertical tunneling as described in claim 6, characterized in that: The permanent magnet is provided with a rotating sealing ring on its outer periphery.
9. A mud circulation system for vertical tunneling as described in claim 1, characterized in that: The slurry inlet pipe, the connecting pipe, and the slurry outlet pipe are all equipped with ultrasonic vibrators.
10. A mud circulation system for vertical tunneling as described in claim 1, characterized in that: The inner walls of the slurry inlet pipe, the connecting pipe, and the slurry outlet pipe, as well as the exterior of the power generation and pressure reduction device, are all provided with a superhydrophobic coating.