Diamond drilling tool with chip removal function

Abstract

The invention relates to the technical field of diamond hole drilling, and discloses a diamond drilling tool with a chip removal function, comprising a connecting tube, a drill bit is arranged at the bottom of the connecting tube, a chip removal mechanism is arranged, mud is injected into the borehole through a flow channel, and the drill bit is cooled by the inflowing mud, so as to avoid the problem that the temperature of the drill bit is sharply increased due to a large amount of heat generated by the friction between the drill bit and the rock, resulting in thermal damage to diamond particles and reducing the cutting performance and service life of the drill bit. At the same time, the viscosity and fluidity of the mud can suspend the rock chips, so that the cuttings are taken out of the hole with the continuous injection of the mud, so that the bottom of the hole can be kept clean, creating good conditions for the continued drilling of the drill bit, and a layer of lubricating mud film is formed between the drill bit and the hole wall, which can reduce the friction resistance between the drill tool and the hole wall and reduce the energy consumption during the drilling process.

Description

Technical Field

[0001] The invention relates to the technical field of diamond hole drilling, and in particular to a diamond drilling tool with a chip removal function. Background Art

[0002] Diamond drilling refers to a drilling method that uses a drill bit made of diamond as an abrasive to break the rock at the bottom of the hole in a rotating manner and use a core tube to obtain the core of the rock (ore). During the drilling process, the diamond drill continuously cuts the rock and produces a large amount of rock cuttings. If the rock cuttings cannot be discharged in time, they will accumulate around the drill bit and inside the drill rod. This will cause the cutting edge of the drill bit to be covered with rock cuttings, reducing the cutting area and reducing the drilling efficiency. The accumulated rock cuttings will increase the resistance during the drilling process, which not only reduces the drilling efficiency, but also increases the wear and energy consumption of the equipment.

[0003] Prior art, such as Chinese patent "CN213869728U", provides a diamond drill bit with chip breaking and chip removal functions, which includes a drill bit base body provided with a plurality of diamond bits arranged in an annular manner, the top of the drill bit base body is connected to the drill string, the end faces and circumferential sides of the diamond bits are embedded with diamond abrasive grains, the drill bit base body is provided with an inner cavity along the inner side of the annularly arranged diamond bits, a first boss bit is provided at the center of the bottom of the inner cavity toward the end face of the diamond bit, and the inner cavity wall is provided with more than two second boss bits radially corresponding to the first boss bit, the end faces and sides of the first boss bit and the second boss bit are embedded with diamond abrasive grains, and the bottom surface of the inner cavity is provided with a plurality of chip removal holes, and the large particles of rock broken in the inner cavity are further broken into small particles or powder particles, so that they can be discharged from the plurality of chip removal holes, the inner cavity of the drill bit base will not be blocked, and the diamond drill bit can operate continuously. Therefore, the above technical scheme can improve construction efficiency and reduce construction costs.

[0004] In this scheme, large-grained rocks are crushed into small particles, and multiple chip removal holes are set to reduce the blockage of the drill bit cavity, so as to improve the chip removal efficiency of the diamond drill after the mud is injected during the drilling operation. In order to ensure smooth chip removal, a high-power mud pump is usually used to pressurize the mud to avoid poor chip removal caused by insufficient pressure, unstable flow, etc. However, the use of a high-power mud pump will increase the cost of the overall operation and increase the pressure inside the mud pipeline, which will increase the burden on the mud pipeline. Long-term use can easily lead to pipeline rupture, making the connection of the pipeline prone to leakage. Summary of the invention

[0005] The purpose of the present invention is to provide a diamond drill with chip removal function in order to solve the above problems and overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a diamond drill with chip removal function, comprising a connecting tube, a drill bit is arranged at the bottom of the connecting tube, and an extension rod is connected to the top of the connecting tube through a connecting sleeve to increase the length of the drill;

[0008] The outer wall of the drill bit is provided with a crushing mechanism for crushing rock formations;

[0009] The bottom of the drill bit is provided with a chip removal mechanism for removing rock cuttings;

[0010] The outer wall of the extension rod is provided with a pressurizing mechanism for increasing the flow rate of the mud;

[0011] A cleaning mechanism is provided at the bottom of the connecting tube for cleaning rock cuttings on the drill bit.

[0012] Preferably, the crushing mechanism comprises a bottom blade, which is arranged at the bottom of the drill bit, and an outer wall of the drill bit is provided with a side blade, and the bottom blade and the side blade are connected as a whole and distributed in a ring array.

[0013] Preferably, the bottom blade is arranged in a fan shape, the side blade is arranged in a spiral shape, and the bottom of the bottom blade is connected to multiple groups of crushing blades. The crushing blades are distributed in sequence from large to small at the bottom of the bottom blade, from the outer circle of the bottom blade sector to the center of the bottom blade sector.

[0014] Preferably, the chip removal mechanism comprises a flow channel, the flow channel is opened on the inner wall of the extension rod and the connecting tube, a liquid spraying port is opened at the bottom of the drill bit, and the flow channel is connected with the liquid spraying port.

[0015] Preferably, the liquid spraying ports are arranged in a group of three and are distributed in a ring shape, the liquid spraying ports are staggered with the bottom cutting edges, and the liquid spraying ports are inclined toward the outside of the drill bit.

[0016] Preferably, the pressurizing mechanism includes a first magnetic ring, which is rotatably connected to the inner wall of the extension rod, the inner wall of the first magnetic ring is connected to a turbine, the outer wall of the extension rod is rotatably connected to a second magnetic ring corresponding to the outer wall of the first magnetic ring, and the outer wall of the second magnetic ring is connected to an impeller.

[0017] Preferably, the cleaning mechanism includes a connecting groove, which is opened on the inner wall of the connecting tube, and the inner wall of the connecting groove is slidably connected with a connecting rod, the bottom of the connecting rod is connected to the drill bit, and the outer walls of the connecting rod are connected with limiting blocks on both sides. A guide groove is opened on the inner wall of the connecting tube corresponding to the position of the limit block, and the limit block is slidably connected to the inner wall of the guide groove.

[0018] Preferably, a sliding groove is provided on the inner wall of the guide groove, a stopper is slidably connected inside the sliding groove, and a spring is connected between the stopper and the inner wall of the sliding groove.

[0019] Preferably, the cleaning mechanism also includes an annular groove, which is opened at the bottom of the outer wall of the connecting rod, and the inner wall of the annular groove is slidably connected with a slip ring, and the outer wall of the slip ring is connected to multiple groups of scrapers, and they are distributed in an annular array, and the bottom of the scrapers are connected to scraper strips, the scrapers and scraper strips are in contact with the outer wall of the drill bit, and the scraper strips and the edge cutting edges are staggered.

[0020] Preferably, a plurality of groups of limit plates are connected to the top of the slip ring and are distributed in a circular array, and limit grooves are provided on the inner wall of the connecting tube at positions corresponding to the limit plates, and the limit grooves slide with the limit plates.

[0021] The beneficial effects are:

[0022] 1. The present invention sets a crushing mechanism and sets the bottom blade in a fan shape, so that the chip groove formed between two adjacent bottom blades at the bottom of the drill bit is wide on the outside and narrow on the inside, making it easier to discharge the rock chips. The spiral side blade will generate a certain lifting force on the rock chips when the drill bit is operating, reducing the friction between the rock chips, so that the rock chips can be easily discharged above the drill bit, thereby improving the efficiency of chip removal. In addition, by setting the crushing blades to be distributed in sequence from large to small, as well as the fan-shaped bottom blade and the spiral side blade, they all have a common function, that is, when the drill bit initially cuts, the drill bit contacts the rock formation with as little area as possible, so that when the drill bit initially contacts the rock formation, it will obtain a larger cutting force, thereby improving the cutting efficiency.

[0023] 2. The present invention provides a chip removal mechanism and injects mud into the borehole through a flow channel. The drill bit is cooled by the inflowing mud, thereby avoiding the problem that the drill bit temperature rises sharply due to the large amount of heat generated by the friction between the drill bit and the rock, resulting in thermal damage to the diamond particles and reducing the cutting performance and service life of the drill bit. At the same time, the viscosity and fluidity of the mud can suspend the rock chips and carry them out of the hole as the mud is continuously injected, thus keeping the bottom of the hole clean and creating good conditions for the drill bit to continue drilling. A lubricating mud film is formed between the drill bit and the hole wall, which can reduce the friction resistance between the drill tool and the hole wall and reduce the energy consumption during the drilling process.

[0024] 3. The present invention sets a pressurizing mechanism and utilizes the potential energy generated by the flow of mud in the flow channel to drive the impeller outside the extension rod to rotate. The rotating impeller will form a lifting force on the mud in the borehole to accelerate the flow of mud, thereby improving the efficiency of mud carrying rock cuttings and avoiding the problem of poor chip removal caused by insufficient pressure, unstable flow and the like. At the same time, it avoids the use of a high-power mud pump, which will lead to an increase in the cost of the overall operation, and will cause the pressure inside the mud pipeline to increase, increase the burden on the mud pipeline, and easily cause the pipeline to rupture after long-term use, making the connection of the pipeline prone to leakage, thereby reducing the burden of later maintenance.

[0025] Fourth, in the present invention, if the drill bit gets stuck during the drilling process or it is necessary to increase the length of the drill rod and add an extension rod, when the drill is lifted, if the drill tool is entangled with the drill bit at the bottom of the hole and the drill bit gets stuck, resulting in excessive friction and difficulty in pulling out the drill bit, the cleaning mechanism can be set up so that when the drill bit is lifted, the resistance generated during the lifting of the drill bit can be used to automatically rotate the drill bit in the direction opposite to the drilling direction, so as to pull the stuck cutting edge out of the stuck position, thereby avoiding the problem of excessive resistance to lifting the drill bit due to the drill bit getting stuck.

[0026] 5. The present invention arranges scrapers and scraper strips on the outer wall of the drill bit. When the drill is stuck, the scrapers and scraper strips can be moved on the outer wall of the drill bit in coordination with the relative displacement between the connecting rod and the connecting tube. This facilitates the scraping and cleaning of debris adhered to the outer wall of the drill bit, thereby reducing the volume of the drill bit when it is lifted, avoiding the problem of excessive resistance due to excessive volume when the drill bit wrapped in debris is lifted in the mud in the hole, and improving the efficiency of lifting the drill by reducing the burden on the drilling rig when lifting the drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a diagram showing the appearance structure of the present invention;

[0029] Figure 2 It is a partial cross-sectional view of the extension rod in the present invention;

[0030] Figure 3 It is a connection relationship diagram between the connecting tube and the drill bit in the present invention;

[0031] Figure 4 It is a structural display diagram of the drill bit in the present invention;

[0032] Figure 5 This is a diagram showing the external structure of the connecting rod in the present invention;

[0033] Figure 6 It is a partial cross-sectional view of the connecting tube in the present invention;

[0034] Figure 7 The present invention Figure 6 A magnified image of point A;

[0035] Figure 8 It is a partial display diagram of the cleaning mechanism in the present invention.

[0036] The accompanying drawings are marked as follows: 1. connecting tube; 2. drill bit; 3. extension rod; 4. flow channel; 5. spray port; 6. connecting sleeve; 7. first magnetic ring; 8. turbine; 9. second magnetic ring; 10. impeller; 11. bottom blade; 12. side blade; 13. crushing blade; 14. connecting groove; 15. connecting rod; 16. limit block; 17. guide groove; 18. slide groove; 19. stop block; 20. spring; 21. limit groove; 22. limit plate; 23. annular groove; 24. slip ring; 25. scraper; 26. scraper strip. DETAILED DESCRIPTION

[0037] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figure 1 , Figure 2 , Figure 4 As shown, the present invention provides a diamond drill with a chip removal function, including a connecting tube 1, a drill bit 2 is arranged at the bottom of the connecting tube 1, an extension rod 3 is connected to the top of the connecting tube 1 through a connecting sleeve 6, and is used to increase the length of the drill tool, the outer wall of the drill bit 2 is provided with a crushing mechanism for crushing rock formations, the bottom of the drill bit 2 is provided with a chip removal mechanism for discharging rock chips, the outer wall of the extension rod 3 is provided with a pressurizing mechanism for increasing the flow rate of mud, and the bottom of the connecting tube 1 is provided with a cleaning mechanism for cleaning the drill bit. 2, the crushing mechanism includes a bottom blade 11, the bottom blade 11 is arranged at the bottom of the drill bit 2, the outer wall of the drill bit 2 is provided with a side blade 12, the bottom blade 11 and the side blade 12 are connected as a whole and are distributed in a ring array, the bottom blade 11 is arranged in a fan shape, the side blade 12 is arranged in a spiral shape, and the bottom of the bottom blade 11 is connected to a plurality of groups of crushing blades 13, which are distributed in sequence from large to small at the bottom of the bottom blade 11, and are distributed from the outer circle of the fan shape of the bottom blade 11 to the center of the fan shape of the bottom blade 11.

[0040] It is worth mentioning that the bottom cutting edge 11, the side cutting edge 12 and the crushing cutting edge 13 are made of diamond. Diamond is the hardest substance in nature, and its hardness is much higher than that of ordinary rocks and minerals. This makes it easy to cut various hard rocks. Diamond has extremely high wear resistance, and during the drilling process, it makes the wear very slow. Due to the small wear, it can always maintain good cutting performance and ensure the stability and continuity of drilling. Diamond has good thermal stability and will not lose its cutting ability due to temperature increase during high-speed drilling.

[0041] Furthermore, by setting a crushing mechanism, the bottom blade 11 is set in a fan shape, so that the chip groove formed between two adjacent bottom blades 11 at the bottom of the drill bit 2 is wide on the outside and narrow on the inside, making it easier to discharge the rock chips, and the spiral side blade 12 will produce a certain lifting force on the rock chips when the drill bit 2 is operating, reducing the friction between the rock chips, so that the rock chips can be easily discharged to the top of the drill bit 2, thereby improving the efficiency of chip removal, and by setting the crushing blades 13 to be distributed in sequence from large to small, as well as the fan-shaped bottom blade 11 and the spiral side blade 12, they all have a common function, that is, when the drill bit 2 initially cuts, the drill bit 2 is in contact with the rock formation with as little area as possible, so that when the drill bit 2 initially contacts the rock formation, it will obtain a larger cutting force, thereby improving the cutting efficiency.

[0042] Example 2

[0043] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the chip removal mechanism includes a flow channel 4, which is opened on the inner wall of the extension rod 3 and the connecting tube 1. A liquid spraying port 5 is opened at the bottom of the drill bit 2, and the flow channel 4 is connected with the liquid spraying port 5. The liquid spraying ports 5 are grouped into three and are distributed in a ring shape. The liquid spraying ports 5 and the bottom cutting edge 11 are staggered, and the liquid spraying ports 5 are inclined toward the outside of the drill bit 2.

[0044] Furthermore, a chip removal mechanism is provided to inject mud into the borehole through the flow channel 4. The drill bit 2 is cooled by the inflowing mud to avoid the problem that the temperature of the drill bit 2 rises sharply due to the large amount of heat generated by the friction between the drill bit 2 and the rock, resulting in thermal damage to the diamond particles and reducing the cutting performance and service life of the drill bit 2. At the same time, the viscosity and fluidity of the mud can suspend the rock chips and carry them out of the hole as the mud is continuously injected. This can keep the bottom of the hole clean, create good conditions for the continued drilling of the drill bit 2, and form a lubricating mud film between the drill bit 2 and the hole wall, which can reduce the friction resistance between the drill tool and the hole wall and reduce the energy consumption during the drilling process.

[0045] Specifically, a flow channel 4 is provided to facilitate connection of a mud pump, and the mud is pressurized by the mud pump to make the mud flow to the inside of the flow channel 4 and be ejected through the liquid spray port 5. A plurality of liquid spray ports 5 are provided to ensure the flow rate of the mud, and the inflowing mud will cool the drill bit 2. Moreover, since the liquid spray port 5 is inclined toward the outside of the drill bit 2, the rock cuttings can be directly pushed out from under the drill bit 2 when the mud is ejected, thereby avoiding the problem that the cutting edge of the drill bit 2 is covered by the rock cuttings due to excessive accumulation of rock cuttings, thereby reducing the cutting area and the drilling efficiency. With the assistance of the lifting force generated when the edge blade 12 rotates, the rock cuttings are discharged from the drill bit 2 as soon as possible following the flow of the mud. Moreover, when the mud passes through the hole, a thin and dense mud skin is formed on the hole wall. This mud skin can effectively prevent the hole wall from collapsing and the infiltration of groundwater, thereby maintaining the stability of the hole wall.

[0046] Example 3

[0047] See also Figure 2 As shown, the pressurizing mechanism includes a first magnetic ring 7, which is rotatably connected to the inner wall of the extension rod 3, and the inner wall of the first magnetic ring 7 is connected to a turbine 8. The outer wall of the extension rod 3 is rotatably connected to a second magnetic ring 9 corresponding to the outer wall of the first magnetic ring 7, and the outer wall of the second magnetic ring 9 is connected to an impeller 10.

[0048] Furthermore, a pressurizing mechanism is provided to utilize the potential energy generated by the flow of mud in the flow channel 4 to drive the impeller 10 located outside the extension rod 3 to rotate. The rotating impeller 10 will generate a lifting force on the mud in the borehole to accelerate the flow of the mud, thereby improving the efficiency of the mud in carrying rock cuttings and avoiding the problem of poor chip removal caused by insufficient pressure, unstable flow and the like.

[0049] Specifically, when the mud in the flow channel 4 passes through the turbine 8, the potential energy generated by the flow of the mud in the flow channel 4 will push the turbine 8, and the rotation of the turbine 8 will drive the first magnetic ring 7 to rotate. Under the action of the magnetic attraction between the first magnetic ring 7 and the second magnetic ring 9, the first magnetic ring 7 will pull the impeller 10 connected to the outer wall of the second magnetic ring 9 to rotate together, so that the mud in the hole will flow faster under the action of the lifting force generated by the rotating impeller 10, thereby improving the efficiency of chip removal.

[0050] Example 4

[0051] See also Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 7As shown, the cleaning mechanism includes a connecting groove 14, which is provided on the inner wall of the connecting tube 1, and a connecting rod 15 is slidably connected to the inner wall of the connecting groove 14, and the bottom of the connecting rod 15 is connected to the drill bit 2, and the outer walls of the connecting rod 15 are connected to limit blocks 16 on both sides, and a guide groove 17 is provided on the inner wall of the connecting tube 1 at a position corresponding to the limit block 16, and the limit block 16 is slidably connected to the inner wall of the guide groove 17, and a slide groove 18 is provided on the inner wall of the guide groove 17, and a stopper 19 is slidably connected to the inner wall of the slide groove 18, and the stopper 19 A spring 20 is connected to the position between the inner wall of the slide groove 18. The stop block 19 is set to limit the limit block 16, so that the limit block 16 is always in a state of resisting the top of the inner wall of the guide groove 17 without the action of external force. When the resistance to lifting the drill is too large, causing the force of the limit block 16 acting on the stop block 19 to be greater than the tension of the spring 20, the limit block 16 will push the stop block 19 to compress the spring 20 and retract it to the inner wall of the slide groove 18, thereby releasing the limit on the limit block 16 and allowing the limit block 16 to slide in the guide groove 17.

[0052] It is worth noting that, in the drilling state, the limit block 16 is always in a state of abutting against the top of the inner wall of the guide groove 17 to ensure the stability of the drill bit 2 during drilling.

[0053] Furthermore, during the drilling process, if the drill bit gets stuck or the drill rod needs to be lengthened by adding an extension rod 3, when the drill is lifted, if the drill tool is entangled with the drill bit at the bottom of the hole and the drill bit gets stuck, resulting in excessive friction and difficulty in pulling out the drill bit, the cleaning mechanism can be provided so that when the drill bit 2 is lifted, the resistance generated during the lifting of the drill bit can be used to cause the drill bit 2 to automatically rotate in the direction opposite to the drilling direction, so as to pull the stuck cutting edge out of the stuck drill position, thereby avoiding the problem of excessive resistance to lifting the drill due to the drill sticking.

[0054] Specifically, when the drill is stuck during the process of lifting the drill, the connecting rod 15 cannot be lifted directly because it is stuck at the drill bit 2. At this time, the connecting tube 1 pulled by the drilling rig will continue to be lifted upward, thereby forcing the limit block 16 on the connecting rod 15 to slide in the guide groove 17, so that the limit block 16 moves downward in a spiral along the guide groove 17, thereby driving the connecting rod 15 to rotate in the connecting groove 14. Since the direction of the inclined position of the guide groove 17 is opposite to the direction of rotation of the drill, the drill bit 2 rotates in the direction opposite to the drilling direction, thereby extracting the stuck cutting edge of the drill bit 2 to reduce the resistance when lifting the drill.

[0055] Example 5

[0056] See also Figure 1 , Figure 5 , Figure 6 , Figure 8As shown, the cleaning mechanism also includes an annular groove 23, which is opened at the bottom of the outer wall of the connecting rod 15, and the inner wall of the annular groove 23 is slidably connected with a slip ring 24, and the outer wall of the slip ring 24 is connected with multiple groups of scrapers 25, and they are distributed in an annular array, and the bottom of the scraper 25 is connected with a scraper strip 26, the scraper 25 and the scraper strip 26 are in contact with the outer wall of the drill bit 2, and the scraper strip 26 and the edge cutting edge 12 are staggered, and the top of the slip ring 24 is connected with multiple groups of limit plates 22, and they are distributed in an annular array, and the inner wall of the connecting tube 1 corresponding to the position of the limit plate 22 is opened with a limit groove 21, and the limit groove 21 is slidably connected with the limit plate 22. By limiting the slip ring 24 through the annular groove 23, it can be prevented from moving up and down, causing the scraper 25 and the scraper strip 26 to leave the surface of the drill bit 2 and affect the cleaning effect.

[0057] Furthermore, by arranging a scraper 25 and a scraper strip 26 on the outer wall of the drill bit 2, when the drill is stuck, the scraper 25 and the scraper strip 26 can be moved on the outer wall of the drill bit 2 in coordination with the relative displacement between the connecting rod 15 and the connecting tube 1, so as to facilitate the scraping and cleaning of debris adhered to the outer wall of the drill bit 2, thereby reducing the volume of the drill bit 2 when it is lifted, avoiding the problem of excessive resistance due to excessive volume when the drill bit 2 wrapped in debris is lifted in the mud in the hole, and improving the efficiency of lifting the drill by reducing the burden on the drilling rig when lifting the drill.

[0058] Specifically, when the limit block 16 slides obliquely along the guide of the guide groove 17, the connecting rod 15 rotates in the connecting groove 14. At the same time, the connecting rod 15 drives the drill bit 2 to rotate. The relative limitation is performed through the connection relationship between the limit groove 21 and the limit plate 22, which can prevent the slip ring 24 from rotating. When the drill bit 2 rotates, the scraper 25 and the scraper strip 26 connected to the slip ring 24 will scrape off the debris adhered to the outer wall of the drill bit 2, so as to avoid the problem of excessive resistance when the debris wraps the drill bit 2 and is lifted in the mud in the hole.

[0059] How it works

[0060] When in use, when the drill tool is drilling, by setting the crushing blades 13 to be distributed in sequence from large to small, and by setting the bottom blade 11 to be fan-shaped or spiral-shaped side blades 12, there is a common function, that is, when the drill bit 2 initially cuts, the drill bit 2 is in contact with the rock formation with as little area as possible, so that when the drill bit 2 initially contacts the rock formation, it will obtain a larger cutting force, and by setting the bottom blade 11 of the drill bit 2 in a fan-shaped manner, the chip groove formed between two adjacent bottom blades 11 at the bottom of the drill bit 2 is wide on the outside and narrow on the inside, so that the rock chips are easier to discharge, and the spiral side blade 12 will generate a certain lifting force on the rock chips when the drill bit 2 is operating, reducing the friction between the rock chips, so that the rock chips can be easily discharged above the drill bit 2, thereby improving the chip removal efficiency. The mud pump is connected to the flow channel 4 during drilling. The mud pump is pressurized to make the mud flow to the inside of the flow channel 4 and spray out through the liquid spray port 5. The flow rate of the mud is ensured by setting multiple liquid spray ports 5. The inflowing mud will cool the drill bit 2. Since the liquid spray port 5 is inclined toward the outside of the drill bit 2, the rock cuttings can be directly pushed out from the bottom of the drill bit 2 when the mud is sprayed out, so as to avoid the problem that the cutting edge of the drill bit 2 is covered by the rock cuttings due to excessive accumulation of rock cuttings, the cutting area is reduced, and the drilling efficiency is reduced. With the assistance of the lifting force generated when the edge blade 12 rotates, the rock cuttings are discharged from the drill bit 2 as soon as possible following the mud flow. When the mud passes through the hole, the mud will form a thin and dense mud skin on the hole wall. This mud skin can effectively prevent the hole wall from being damaged. The collapse and infiltration of groundwater maintain the stability of the hole wall, and when the mud in the flow channel 4 passes through the turbine 8, the potential energy generated by the flow of mud in the flow channel 4 will drive the turbine 8, and the rotation of the turbine 8 drives the first magnetic ring 7 to rotate. Under the action of the magnetic attraction between the first magnetic ring 7 and the second magnetic ring 9, the first magnetic ring 7 will pull the impeller 10 connected to the outer wall of the second magnetic ring 9 to rotate together, so that the mud in the hole, under the action of the lifting force generated by the rotating impeller 10, the flow speed of the mud will become faster, thereby improving the efficiency of chip removal. When the drill is lifted later, if the drill is stuck, when the resistance to the extraction of the drill bit 2 is too large, the connecting rod 15 cannot be directly lifted because it is stuck at the drill bit 2. At this time, the connecting tube 1 pulled by the drilling rig will continue to be lifted upward The limit block 16 on the connecting rod 15 is lifted, thereby forcing the limit block 16 to slide in the guide groove 17, so that the limit block 16 makes a spiral downward movement along the guide groove 17, thereby driving the connecting rod 15 to rotate in the connecting groove 14. Since the direction of the inclined position of the guide groove 17 is opposite to the direction of rotation of the drilling, the drill bit 2 is rotated in the opposite direction of the drilling direction, thereby extracting the cutting edge part of the drill bit 2 stuck, so as to reduce the resistance when lifting the drill. At the same time, when the limit block 16 slides along the guide of the guide groove 17, the connecting rod 15 rotates in the connecting groove 14, and the connecting rod 15 drives the drill bit 2 to rotate. The relative limit is performed by the connection relationship between the limit groove 21 and the limit plate 22, so that the slip ring 24 can be prevented from rotating. When the drill bit 2 rotates,The scraper 25 and scraper strip 26 connected to the slip ring 24 will scrape off the debris adhering to the outer wall of the drill bit 2 to avoid the problem of excessive resistance when the debris wraps the drill bit 2 and is lifted in the mud in the hole.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A diamond drill with chip removal function, characterized in that: It comprises a connecting tube, a drill bit is arranged at the bottom of the connecting tube, and an extension rod is connected to the top of the connecting tube through a connecting sleeve to increase the length of the drilling tool; The outer wall of the drill bit is provided with a crushing mechanism for crushing the rock formation; A chip removal mechanism is provided at the bottom of the drill bit to discharge rock cuttings; The outer wall of the extension rod is provided with a pressurizing mechanism for increasing the flow rate of the mud; A cleaning mechanism is provided at the bottom of the connecting tube for cleaning rock cuttings on the drill bit; The cleaning mechanism comprises a connecting groove, which is provided on the inner wall of the connecting tube, a connecting rod is slidably connected to the inner wall of the connecting groove, the bottom of the connecting rod is connected to the drill bit, both sides of the outer wall of the connecting rod are connected to limit blocks, a guide groove is provided on the inner wall of the connecting tube at a position corresponding to the limit block, and the limit block is slidably connected to the inner wall of the guide groove; The inner wall of the guide groove is provided with a slide groove, the inner sliding connection of the slide groove is provided with a stopper, and a spring is connected between the stopper and the inner wall of the slide groove; The limit block moves spirally downward along the guide groove, and the direction of the inclined position of the guide groove is opposite to the direction of the drilling rotation.

2. A diamond drill with chip removal function according to claim 1, characterized in that: The crushing mechanism comprises a bottom blade, which is arranged at the bottom of the drill bit, and a side blade is arranged on the outer wall of the drill bit. The bottom blade and the side blade are connected as a whole and distributed in a ring array.

3. The diamond drill with chip removal function according to claim 2, characterized in that: The bottom blade is arranged in a fan shape, the side blade is arranged in a spiral shape, and a plurality of groups of crushing blades are connected to the bottom of the bottom blade. The crushing blades are distributed in sequence from large to small at the bottom of the bottom blade, and are distributed from the outer circle of the bottom blade fan shape to the center of the bottom blade fan shape.

4. The diamond drill with chip removal function according to claim 1, characterized in that: The chip removal mechanism comprises a flow channel, which is arranged on the inner wall of the extension rod and the connecting tube, and a liquid spraying port is arranged at the bottom of the drill bit, and the flow channel is communicated with the liquid spraying port.

5. The diamond drill with chip removal function according to claim 4, characterized in that: The liquid spraying ports are arranged in a group of three and are distributed in a ring shape. The liquid spraying ports and the bottom cutting edges are arranged in a staggered manner, and the liquid spraying ports are inclined toward the outside of the drill bit.

6. The diamond drill with chip removal function according to claim 1, characterized in that: The pressurizing mechanism includes a first magnetic ring, which is rotatably connected to the inner wall of the extension rod, the inner wall of the first magnetic ring is connected to a turbine, the outer wall of the extension rod is rotatably connected to a second magnetic ring corresponding to the outer wall of the first magnetic ring, and the outer wall of the second magnetic ring is connected to an impeller.

7. The diamond drill with chip removal function according to claim 1, characterized in that: The cleaning mechanism also includes an annular groove, which is opened at the bottom of the outer wall of the connecting rod. The inner wall of the annular groove is slidably connected with a slip ring. The outer wall of the slip ring is connected to multiple groups of scrapers, and they are distributed in an annular array. The bottom of the scrapers are connected with scraper strips. The scrapers and scraper strips are in contact with the outer wall of the drill bit, and the scraper strips and the edge cutting edges are staggered.

8. The diamond drill with chip removal function according to claim 7, characterized in that: The top of the slip ring is connected with multiple groups of limit plates, which are distributed in a circular array. The inner wall of the connecting tube is provided with limit grooves at positions corresponding to the limit plates, and the limit grooves are slidably connected with the limit plates.

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