CN115788311B - Hybrid drill bit with reinforced core cutting function - Google Patents
Hybrid drill bit with reinforced core cutting function Download PDFInfo
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- CN115788311B CN115788311B CN202310024819.0A CN202310024819A CN115788311B CN 115788311 B CN115788311 B CN 115788311B CN 202310024819 A CN202310024819 A CN 202310024819A CN 115788311 B CN115788311 B CN 115788311B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention belongs to the technical field of drilling equipment, and relates to a hybrid drill bit with a core cutting function reinforced. The drill bit comprises a drill bit matrix, wherein blades are fixedly arranged around the lower end of the drill bit matrix; the middle part of drill bit base member lower extreme is equipped with a plurality of movable cutting teeth, the inside upper portion of drill bit base member is equipped with the refrigerator. A plurality of groups of heat exchange medium loops are arranged in the drill bit base body. The heat exchange medium in the drill bit can absorb heat generated by friction with earth and stones in the working process of the blade. When the thermal expansion piston moves along the second liquid channel, the thermal exchange medium is pushed to flow, so that the thermal exchange medium with higher temperature near the blade flows in a direction away from the blade, and the thermal exchange medium with lower temperature flows to a position near the blade. Better cooling treatment is carried out to the blade, has improved radiating efficiency. When the movable cutting teeth meet harder rocks, the movable cutting teeth overcome the elastic force of the springs and move towards the limit mounting grooves, so that the movable cutting teeth are prevented from being damaged.
Description
Technical Field
The invention belongs to the technical field of drilling equipment, and relates to a hybrid drill bit with a core cutting function reinforced.
Background
The drill bit plays an important role in drilling works such as petroleum and natural gas, mine engineering, construction foundation engineering construction, geology, hydrology and the like. During the drilling process of the drill bit, a large amount of heat is generated by friction between the drill bit rotating at a high speed and rock soil, so that the temperature of the drill bit is increased, the hardness of the drill bit is reduced due to the increase of the temperature of the drill bit, and the performance of the drill bit is reduced. And the high temperature can cause the inside of the drill bit to generate larger internal stress, so that the drill bit is easy to damage, and the service life of the drill bit is reduced.
The tip of drill bit is covered with cutting teeth, but the cutting teeth cutting speed that is in the middle part is little, the gyration is regional little, and the rock of cutting is difficult for discharging, remains in drill bit lower extreme middle part, causes drill bit lower extreme middle part and rock to produce great frictional force to form a large amount of heats, consequently need carry out timely cooling treatment to the drill bit, guarantee the normal work of drill bit. In addition, in the existing drill bit, the cutting teeth at the middle part are of a fixed structure, so that the situation that the cutting teeth are damaged easily occurs when the middle cutting teeth encounter harder rocks.
In order to solve the above problems, the present invention provides a hybrid drill for enhancing the core cutting function.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a hybrid drill for strengthening the core cutting function.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a hybrid drill bit for enhancing core cutting functionality, comprising: the drill bit comprises a drill bit matrix, wherein blades are fixedly arranged around the lower end of the drill bit matrix, and a plurality of movable cutting teeth are arranged in the middle of the lower end of the drill bit matrix; a cooling channel is formed in the drill bit matrix, and a refrigerator is positioned in the cooling channel; a plurality of groups of heat exchange medium loops are arranged in the drill bit base body; the heat exchange medium loop comprises a first liquid channel, a second liquid channel, an elastic tube, a third liquid channel and a fourth liquid channel; the first liquid channel, the second liquid channel, the fourth liquid channel, the third liquid channel and the elastic tube are sequentially communicated end to form a closed loop, and the fourth liquid channel is arranged close to the blade; the section of the second liquid channel is trapezoid, and the lower end of the second liquid channel is narrow and the upper end of the second liquid channel is wide; the second liquid channel is obliquely arranged, and the lower end of the second liquid channel is obliquely outwards; a thermal expansion piston is slidably matched in the second liquid channel; a first cooling groove is formed in the drill bit base body and close to the periphery of the second liquid channel, the cooling channel is communicated with the first cooling groove, and cooling medium is filled in the cooling channel and the first cooling groove; a trigger piece is arranged in the first liquid channel or the first cooling groove and is matched with the refrigerator; the drill bit matrix is internally provided with a communicated heat dissipation groove, and the elastic tube is fixedly arranged in the heat dissipation groove.
Further, a heat conducting fin is arranged in the blade, one side of the heat conducting fin is close to the working surface of the blade, and the other side of the heat conducting fin is close to the lower end of the heat exchange medium loop; the lower end of the second liquid channel is close to the heat conducting fin.
Further, the trigger piece comprises a trigger ball and a touch switch; the trigger ball is movably arranged in the first liquid channel; a plurality of through holes are formed in the trigger ball; the trigger ball is a light ball; the touch switch is fixedly arranged at the upper end of the first liquid channel; the trigger ball is matched with the touch switch; the first liquid channel is positioned above the second liquid channel; the touch switch is electrically connected with the refrigerator through the controller.
Further, the lower end of the first liquid channel is fixedly connected with a first limiting piece; one end of the first limiting piece is communicated with the first liquid channel; the other end of the first limiting piece is communicated with the upper end of the second liquid channel through a first communication pipe; the upper end of the first liquid channel is fixedly connected with a second limiting part, and the upper end of the second limiting part is communicated with the elastic pipe through a second communicating pipe; the first limiting piece and the second limiting piece are used for preventing the trigger ball from being separated from the first liquid channel.
Further, a second cooling groove is formed in the drill bit matrix near the periphery of the third liquid channel; and a cooling medium is filled in the second cooling groove, and the second cooling groove is communicated with the cooling channel.
Further, the trigger piece is a temperature sensor, the temperature sensor is installed in the first cooling groove, and the refrigerator and the temperature sensor are electrically connected with the controller.
Further, the cross-sectional area of the lower end of the second liquid channel is larger than the cross-sectional area of the first liquid channel; the cross-sectional area of the lower end of the second liquid channel is larger than the cross-sectional area of the fourth liquid channel.
Further, the upper end of the drill bit matrix is a connecting seat.
Further, the plurality of blades are distributed at the bottom end of the drill bit matrix in a fan shape; the lower end of each blade is fixedly provided with a plurality of cylindrical first diamond mosaic; the root of the first diamond inlay is embedded into the blade, and the end part of the first diamond inlay protrudes out of the lower end surface of the blade.
Further, the lower end face of the movable cutting tooth is an inclined plane, and a plurality of cylindrical second diamond mosaic bodies are fixedly arranged on the inclined plane; the root of the second diamond inlay is embedded into the movable cutting tooth, and the end part of the second diamond inlay protrudes out of the lower end surface of the movable cutting tooth; a limit mounting groove is formed in the bottom of the drill bit matrix; a stop block is fixedly arranged at the upper end of the movable cutting tooth and is in limit sliding fit with the limit mounting groove; and a spring is abutted between the stop block and the bottom wall of the limit mounting groove.
Compared with the prior art, the invention has the following beneficial effects: the heat exchange medium in the drill bit can absorb heat generated by friction with earth and stones in the working process of the blade. When the thermal expansion piston moves along the second liquid channel, the thermal exchange medium is pushed to flow, so that the thermal exchange medium with higher temperature near the blade flows in a direction away from the blade, and the thermal exchange medium with lower temperature flows to the lower part of the thermal exchange medium loop, namely the part near the blade. Thereby better cooling the blade, improved radiating efficiency.
When encountering harder rock, the movable cutting teeth overcome the elasticity of the springs and move towards the limit mounting grooves, so that the movable cutting teeth are prevented from being damaged.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a partial cross-sectional view of the present invention;
fig. 4 is a schematic view of the structure of the movable cutter of the present invention.
In the figure: 1. a drill bit base; 2. a connecting seat; 3. a blade; 4. a first liquid channel; 5. a second liquid channel; 6. a heat sink; 7. an elastic tube; 8. a thermal expansion piston; 9. a first cooling tank; 10. a heat conductive sheet; 11. triggering a ball; 12. a touch switch; 13. a first limiting member; 14. a second limiting piece; 15. a refrigerator; 16. a third liquid channel; 17. a first diamond mosaic; 18. a movable cutting tooth; 19. a spring; 20. a second diamond mosaic; 21. a second cooling tank; 22. and a fourth liquid passage.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1 to 4, the technical scheme adopted by the invention is as follows: a hybrid drill for enhancing core cutting function includes a drill base 1. The bit body 1 has heat conducting properties. The upper end of the drill bit base body 1 is provided with a connecting seat 2, and the drill bit is mounted on corresponding driving equipment through the connecting seat 2. A plurality of blades 3 are fixed at the lower end of the drill bit matrix 1. The blade 3 has a plurality ofly, and a plurality of blades 3 are fan-shaped to be distributed in the bottom of drill bit base member 1, and the lower extreme of every blade 3 has all set firmly a plurality of columniform first diamond mosaic 17, and the root of first diamond mosaic 17 imbeds the blade 3 inside, and the tip protrusion is in the lower terminal surface of blade 3.
When the drill bit is in operation, the first diamond inlay 17 pre-breaks the rock, and the blades 3 then complete the subsequent rock breaking process. Thus, the impact load of the blade 3 is reduced, the abrasion of the blade 3 is reduced, and the service life of the blade 3 is prolonged. In this embodiment, the number of the blades 3 is three, and three cylindrical first diamond inlays 17 are fixedly arranged on each blade 3.
The middle part of bit base member 1 lower extreme is equipped with a plurality of movable cutting teeth 18, the lower terminal surface of movable cutting teeth 18 is the inclined plane, set firmly a plurality of cylindrical second diamond mosaic 20 on the inclined plane. The root of the second diamond mosaic 20 is embedded into the interior of the movable cutting tooth 18, and the end protrudes from the lower end surface of the movable cutting tooth 18. The bottom of the drill bit matrix 1 is provided with a limit mounting groove. A stop block is fixedly arranged at the upper end of the movable cutting tooth 18 and is in limit sliding fit with the limit mounting groove. A spring 19 is abutted between the stop block and the bottom wall of the limit mounting groove. In this embodiment, the number of the movable cutting teeth 18 is five, and the five movable cutting teeth 18 are distributed in a fan shape in the middle of the lower end of the drill bit body 1. The number of second diamond inlays 20 on each movable cutting tooth 18 is two. The provision of the movable cutting teeth 18 may enhance the cutting capacity of the drill bit.
The second diamond insert 20 may enhance the cutting ability of the core of the bit. During the drilling process, if the drill encounters an obstacle, the movable cutting teeth 18 can overcome the elastic force of the springs 19 and move upwards along the limit mounting grooves, so that the movable cutting teeth 18 are prevented from being damaged.
A plurality of groups of heat exchange medium loops are arranged in the drill bit matrix 1. The heat exchange medium circuit is filled with the heat exchange medium, and when the temperature of the blade 3 of the drill bit is increased, the heat exchange medium can cool the blade 3 so as to ensure the performance of the blade 3.
The inner part of the blade 3 is fixedly provided with a heat conducting fin 10. One side of the heat conductive sheet 10 is close to the blade 3, and the other side of the heat conductive sheet 10 is close to the lower part of the heat exchange medium circuit.
The heat exchange medium circuit includes a first liquid passage 4, a second liquid passage 5, a fourth liquid passage 22, a third liquid passage 16, and an elastic tube 7. The first liquid channel 4, the second liquid channel 5, the fourth liquid channel 22, the third liquid channel 16 and the elastic tube 7 are sequentially communicated end to form a closed loop.
The second liquid channel 5 is tapered, i.e. the cross section of the second liquid channel 5 is trapezoidal, and the upper end is wide and the lower end is narrow. The second liquid channel 5 is inclined, and the lower end of the second liquid channel is biased to the outer side. The second liquid channel 5 is slidably fitted with a thermal expansion piston 8. The thermal expansion piston 8 has a certain weight. The thermal expansion piston 8 is matched with the lower end of the second liquid channel 5 under the action of gravity in a natural state. When the bit body 1 is rotated, the thermal expansion piston 8 has a tendency to move downward and outward by centrifugal force. I.e. the centrifugal force to which the thermal expansion piston 8 is subjected can be split into a force down the second liquid channel 5 and a force perpendicular to the axis of the second liquid channel 5 and outwards. The thermal expansion piston 8 can be made of thermal expansion metal materials, such as chromium molybdenum steel, austenitic stainless steel and the like, and the thermal expansion piston 8 can change in a solid form by the action of temperature. The volume change of the thermal expansion piston 8 is linear with the temperature change. When the thermal expansion piston 8 thermally expands to become large, the thermal expansion piston 8 slides upward along the second liquid passage 5 against the centrifugal force and its own weight. The thermal expansion piston 8 is in this embodiment a sphere.
The inner wall of the second liquid channel 5 is smooth. Since the inner wall of the second liquid passage 5 is smooth and the heat exchange medium has a lubricating effect, the friction between the thermal expansion piston 8 and the inner wall of the second liquid passage 5 is small, so that the thermal expansion piston 8 can move upward along the second liquid passage 5. The thermal expansion piston 8 is prevented from blocking the second liquid passage 5 so as not to move up and down along the second liquid passage 5. Since the centrifugal force to which the thermal expansion piston 8 is subjected is outward, the pressure between the thermal expansion piston 8 and the inner wall periphery of the second liquid passage 5 is uneven, and the thermal expansion piston 8 is prevented from being caught in the second liquid passage 5 and being unable to move.
A cooling channel is arranged in the drill bit matrix 1, and a refrigerator 15 is arranged in the cooling channel. The cooling channels are not shown in the drawings. A first cooling groove 9 is provided around the second liquid passage 5 in the drill bit body 1. The cooling channel is communicated with the first cooling groove 9, and cooling medium is arranged in the cooling channel and the first cooling groove 9. The refrigerator 15 operates to cool the cooling medium in the cooling channels and the first cooling tank 9. The cooling medium in the first cooling tank 9 cools the second liquid passage 5. The refrigerator 15 can perform a cooling process on the second liquid passage 5 through the cooling medium in the first cooling tank 9.
The lower end of the second liquid passage 5 is close to the heat conductive sheet 10. This makes it easier for the thermal expansion piston 8 to absorb more heat.
The cross-sectional area of the lower end of the second liquid passage 5 is larger than the cross-sectional area of the first liquid passage 4, and the cross-sectional area of the lower end of the second liquid passage 5 is larger than the cross-sectional area of the fourth liquid passage 22. I.e. the inner diameter of the lowermost end of the second liquid channel 5 is larger than the inner diameter of the first liquid channel 4 and the inner diameter of the lowermost end of the second liquid channel 5 is larger than the diameter of the fourth liquid channel 22. In this way the heat expansion piston 8 is moved a small distance in the second liquid channel 5, i.e. the heat exchange medium is moved a large distance in the first liquid channel 4 or the fourth liquid channel 22. In the present embodiment, the fourth liquid passage 22 has the same cross-sectional area as the third liquid passage 16.
A trigger is arranged in the first liquid channel 4 and cooperates with the refrigerator 15.
The trigger comprises a trigger ball 11 and a touch switch 12. The trigger ball 11 cooperates with the touch switch 12 to control the operation of the refrigerator 15.
The trigger ball 11 is slidably arranged in the first liquid channel 4. The trigger ball 11 is provided with a plurality of through holes. The trigger ball 11 is a lightweight ball. The first liquid channel 4 is above the second liquid channel 5. Alternatively, the trigger ball 11 has a cage-like spherical structure, so that the influence on the liquid flow is minimized, but the trigger ball 11 should also be capable of moving upwards under the drive of the heat exchange medium.
The touch switch 12 is fixedly arranged at the upper end of the first liquid channel 4.
The gap between the trigger ball 11 and the first liquid channel 4 is smaller than the height of the touch switch 12 relative to the inner wall of the first liquid channel 4, so that the trigger ball 11 can contact the touch switch 12 and act on the touch switch 12 when it moves to the upper end of the first liquid channel 4.
When the thermal expansion piston 8 slides up the second liquid passage 5, the heat exchange medium in the second liquid passage 5 flows in a direction away from the upper end of the second liquid passage 5 and flows into the first liquid passage 4. The trigger ball 11 in the first liquid passage 4 moves toward the upper end of the first liquid passage 4 by the impact and pushing of the heat exchange medium until it contacts the touch switch 12, and acts on the touch switch 12 to activate the refrigerator 15. The controller sets the running time of the refrigerator 15, when the trigger ball 11 contacts the touch switch 12, the refrigerator 15 starts to refrigerate, and the refrigerator 15 stops automatically after the running time is set.
The lower end of the first liquid channel 4 is fixedly connected with a first limiting piece 13, and the upper end of the first liquid channel 4 is fixedly connected with a second limiting piece 14. The first stopper 13 and the second stopper 14 prevent the trigger ball 11 from falling out of the first liquid passage 4.
The upper end of the first limiting piece 13 is communicated with the first liquid channel 4, and the lower end of the first limiting piece 13 is communicated with the upper end of the second liquid channel 5 through a first communication pipe.
The lower end of the second limiting piece 14 is communicated with the upper end of the first liquid channel 4, and the upper end of the second limiting piece 14 is communicated with the first elastic tube 7 through a second communicating tube.
A heat dissipation groove 6 is formed in the drill bit matrix 1. The elastic tube 7 is fixedly arranged in the heat dissipation groove 6. The elastic tube 7 is located at the upper end of the heat exchange medium circuit. One end of the elastic tube 7 is communicated and connected with the second limiting piece 14, and the other end of the elastic tube 7 is communicated with the third liquid channel 16. One end of the third liquid passage 16 communicates with the elastic tube 7, and the other end of the third liquid passage 16 communicates with the lower end of the second liquid passage 5 through the fourth liquid passage 22.
When the heat exchange medium in the heat exchange medium circuit is heated, the volume of the heat exchange medium expands to a certain extent, and at this time, the elastic tube 7 is elastically deformed in the radial direction, and the inner diameter of the elastic tube 7 becomes large, so that the volume of the heat exchange medium circuit becomes large. The expanded elastic tube 7 is cooled by heat dissipation through the heat dissipation groove 6.
A second cooling channel 21 is provided around the third liquid channel 16 in the drill bit body 1, said second cooling channel 21 also being in communication with said cooling channel. The second cooling tank 21 is filled with a cooling medium. The refrigerator 15 operates to cool the cooling medium in the cooling passage and the second cooling tank 21. The cooling medium in the second cooling tank 21 cools the third liquid passage 16. The refrigerator 15 can perform a cooling process on the third liquid passage 16 through the cooling medium in the second cooling tank 21.
The second cooling tank 21 can cool down the third liquid passage 16 and can also lower the temperature in the middle of the bit body 1.
The cooling medium may be selected from: heat exchange media, drilling fluids, and the like. The choice of cooling medium includes, but is not limited to, the examples described above. The drill bit base body 1 is provided with a controller. The refrigerator 15 and the touch switch 12 are both electrically connected with the controller.
Working principle: the drill bit is mounted to the corresponding driving device via the connection socket 2. The driving device drives the drill bit to rotate, so that the drill bit works. The cylindrical first diamond insert 17 on blade 3 forms a pre-crushing zone throughout the drilling process, and blade 3 then crushes the pre-crushing zone. Thus being beneficial to improving the drilling speed, reducing the abrasion of the blade 3 and further improving the service life of the drill bit. During the drilling process, if the core meets the obstacle, the movable cutting teeth 18 can overcome the elastic force of the springs 19 and move upwards along the limit mounting grooves, so that the movable cutting teeth 18 are prevented from being damaged.
In the initial state, the thermal expansion piston 8 is in a natural state, i.e., the thermal expansion piston 8 has not yet expanded to become large, and the thermal expansion piston 8 is at the lower end of the second liquid passage 5. The trigger ball 11 is at the lower end of the first liquid channel 4.
At the beginning of high-speed rotation of the bit body 1, the thermal expansion piston 8 collides against the lower end of the second liquid passage 5 by centrifugal force and self gravity.
During high speed rotation of the drill bit, the first diamond insert 17, the blades 3, the movable cutting teeth 18, and the second diamond insert 20 continuously rub against earth and stone to generate a large amount of heat, and the heat conducting fin 10 absorbs the heat and transfers the heat to the heat exchange medium in the heat exchange medium circuit. And the temperature of the heat exchange medium near the heat conductive sheet 10 is higher than the temperature of the heat exchange medium far from the heat conductive sheet 10 in the entire heat exchange medium circuit. I.e. the temperature of the heat exchange medium in the fourth liquid channel 22 is highest.
The thermal expansion piston 8 absorbs heat in the heat exchange medium, so that the thermal expansion piston 8 thermally expands to a larger extent, i.e., the diameter of the thermal expansion piston 8 becomes larger. The thermal expansion piston 8, which is thermally expanded to be large, moves upward along the second liquid passage 5 against the centrifugal force and its own weight under the guide of the second liquid passage 5. And the thermal expansion piston 8 is always kept in fit with the inner wall of the second liquid channel 5 under the action of centrifugal force and self gravity. The heat expansion piston 8 pushes the heat exchange medium in the second liquid passage 5 upward to flow the heat exchange medium in the entire heat exchange medium circuit. The heat exchange medium in the third liquid passage 16 flows into the fourth liquid passage 22, and the heat exchange medium in the fourth liquid passage 22 flows into the second liquid passage 5.
The lower temperature heat exchange medium is thus led into the fourth liquid channel 22, which allows cooling of the blade 3. The heat exchange medium with higher temperature flows into the second liquid channel 5, so that the temperature in the second liquid channel 5 is continuously increased, and the thermal expansion piston 8 is continuously expanded and becomes larger.
During the upward movement of the thermal expansion piston 8, when the heat exchange medium in the second liquid channel 5 flows upward, the heat exchange medium impacts and pushes the trigger ball 11 to move upward, so that the trigger ball 11 moves toward the upper end of the first liquid channel 4 until the trigger ball 11 contacts with the touch switch 12, the touch switch 12 is triggered, and the refrigerator 15 is started. The trigger ball 11 is then blocked by the second stop 14 against the second stop 14. The heat exchange medium flows upward through the through holes of the trigger ball 11.
After the trigger ball 11 contacts the touch switch 12, the refrigerator 15 is started. The heat expansion piston 8 moves up to the upper end of the second liquid passage 5 to enable the heat exchange medium in the third liquid passage 16 to flow to the fourth liquid passage 22.
When the refrigerator 15 starts to operate, the refrigerator 15 cools the cooling medium; the cooling medium exchanges heat by flowing between the refrigerator 15 and the first cooling tank 9 and between the refrigerator 15 and the second cooling tank 21. The cooled cooling medium enters the first cooling tank 9 and the second cooling tank 21. The refrigerator 15 continuously cools the cooling medium to gradually decrease the temperature in the first cooling tank 9, gradually decrease the temperature of the heat exchange medium in the second liquid passage 5, and gradually decrease the temperature of the thermal expansion piston 8. As the temperature of the thermal expansion piston 8 gradually decreases, the diameter of the thermal expansion piston 8 gradually becomes smaller with the gradual decrease in temperature, and the change in diameter of the thermal expansion piston 8 is in a linear relationship with the change in temperature. The thermal expansion piston 8 with gradually smaller diameter gradually moves downwards along the second liquid channel 5 under the action of centrifugal force and gravity, and in the process, the thermal expansion piston 8 is always attached to the inner wall of the second liquid channel 5. The heat expansion piston 8 pushes the heat exchange medium with lower temperature in the second liquid channel 5 to gradually flow into the fourth liquid channel 22, the heat exchange medium with higher temperature in the fourth liquid channel 22 flows into the third liquid channel 16, the heat exchange medium in the third liquid channel 16 flows into the elastic tube 7, the heat exchange medium in the elastic tube 7 flows into the first liquid channel 4, and the heat exchange medium in the first liquid channel 4 flows to above the heat expansion piston 8 in the second liquid channel 5. The heat exchange medium flowing into the fourth liquid passage 22 cools down the blade 3, absorbs the heat of the heat conductive sheet 10 and gradually increases in temperature.
The refrigerator 15 continuously cools the cooling medium to gradually lower the temperature in the second cooling tank 21, and the second cooling tank 21 cools the heat exchange medium in the third liquid passage 16. Therefore, the heat exchange medium flowing into the third liquid passage 16 is subjected to the action temperature of the second cooling tank 21 gradually decreases.
When the heat exchange medium in the elastic tube 7 flows into the first liquid passage 4, the trigger ball 11 gradually returns to the bottom of the first liquid passage 4 under the pushing of the heat exchange medium.
As the temperature in the first cooling tank 9 gradually decreases, the thermal expansion piston 8 gradually becomes smaller. The thermal expansion piston 8 gradually returns to the bottom of the second liquid channel 5. The refrigerator 15 then reaches the operation time and stops operating. The cooling medium in the first cooling tank 9 is not cooled and the temperature in the first cooling tank 9 is not lowered any more. Then, the heat exchange medium in the fourth liquid channel 22 absorbs heat and then transfers the heat to the thermal expansion piston 8 again, so that the temperature of the thermal expansion piston 8 is gradually increased again.
When the temperature of the heat exchange medium rises to a certain degree, the process is repeated to cool the blade 3, so that the blade 3 maintains normal performance.
Example 2
This embodiment differs from embodiment 1 in that:
the trigger piece is a temperature sensor, the temperature sensor is installed in the first cooling tank 9, and the refrigerator 15 and the temperature sensor are electrically connected with the controller.
When the temperature sensor detects the temperature in the first cooling tank 9 in the process that the thermal expansion piston 8 is heated upwards, the temperature exceeds a high-temperature set value. The temperature sensor controls the activation of the refrigerator 15 by the controller.
The heat expansion piston 8 moves up to the upper end of the second liquid passage 5 to enable the heat exchange medium in the third liquid passage 16 to flow to the fourth liquid passage 22. The heat exchange medium in the fourth liquid channel 22 enters the second liquid channel 5.
When the refrigerator 15 starts to operate, the refrigerator 15 cools the cooling medium; the cooling medium exchanges heat between the refrigerator 15 and the first cooling tank 9 and between the refrigerator 15 and the second cooling tank 21. The cooling medium cooled in the first cooling tank 9 and the second cooling tank 21 cools the heat exchange medium in the second liquid passage 5 and the third liquid passage 16, respectively.
The refrigerator 15 continuously cools the cooling medium and feeds the cooling medium into the first cooling tank 9, gradually decreases the temperature in the first cooling tank 9, gradually decreases the temperature of the heat exchange medium in the second liquid passage 5, and further gradually decreases the temperature of the thermal expansion piston 8.
As the temperature of the thermal expansion piston 8 gradually decreases, the diameter of the thermal expansion piston 8 gradually becomes smaller with the gradual decrease in temperature, and the change in diameter of the thermal expansion piston 8 is in a linear relationship with the change in temperature. The thermal expansion piston 8 with gradually smaller diameter gradually moves downwards along the second liquid channel 5 under the action of centrifugal force and gravity, and in the process, the thermal expansion piston 8 is always attached to the inner wall of the second liquid channel 5. The heat expansion piston 8 pushes the heat exchange medium with lower temperature in the second liquid channel 5 to gradually flow into the fourth liquid channel 22, the heat exchange medium with higher temperature in the fourth liquid channel 22 flows into the third liquid channel 16, the heat exchange medium in the third liquid channel 16 flows into the elastic tube 7, the heat exchange medium in the elastic tube 7 flows into the first liquid channel 4, and the heat exchange medium in the first liquid channel 4 flows to above the heat expansion piston 8 in the second liquid channel 5. The heat exchange medium having a higher temperature in the fourth liquid passage 22 flows into the third liquid passage 16, and heat exchange is performed in the second cooling tank 21, thereby lowering the temperature. The heat exchange medium flowing into the fourth liquid passage 22 cools down the blade 3, absorbs the heat of the heat conductive sheet 10 and gradually increases in temperature.
The refrigerator 15 continuously cools the cooling medium to gradually lower the temperature in the second cooling tank 21, and the second cooling tank 21 cools the heat exchange medium in the third liquid passage 16. Therefore, the heat exchange medium flowing into the third liquid passage 16 is subjected to the action temperature of the second cooling tank 21 gradually decreases.
The heat exchange medium in the elastic tube 7 flows into the first liquid passage 4, and the heat exchange medium in the first liquid passage 4 flows into the second liquid passage 5.
As the temperature in the first cooling tank 9 gradually decreases, the thermal expansion piston 8 gradually becomes smaller. The thermal expansion piston 8 gradually returns to the bottom of the second liquid channel 5.
In the cooling process of the first cooling tank 9, when the temperature sensor detects the temperature in the first cooling tank 9, the temperature is lower than the low-temperature set value. The temperature sensor controls the refrigerator 15 to be turned off by the controller.
The refrigerator 15 is then stopped. The cooling medium in the first cooling tank 9 is not cooled and the temperature in the first cooling tank 9 is not lowered any more. Then, the heat exchange medium in the fourth liquid channel 22 absorbs heat and then transfers the heat to the thermal expansion piston 8 again, so that the temperature of the thermal expansion piston 8 is gradually increased again.
When the temperature of the heat exchange medium rises to a certain degree, the process is repeated to cool the blade 3, so that the blade 3 maintains normal performance. Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A hybrid drill for enhancing core cutting functionality, comprising:
the drill bit comprises a drill bit matrix (1), blades (3) are fixedly arranged around the lower end of the drill bit matrix (1), and a plurality of movable cutting teeth (18) are arranged in the middle of the lower end of the drill bit matrix (1); a cooling channel is formed in the drill bit matrix (1), and a refrigerator (15) is arranged in the cooling channel;
a plurality of groups of heat exchange medium loops are arranged in the drill bit matrix (1); the heat exchange medium loop comprises a first liquid channel (4), a second liquid channel (5), an elastic tube (7), a third liquid channel (16) and a fourth liquid channel (22); the first liquid channel (4), the second liquid channel (5), the fourth liquid channel (22), the third liquid channel (16) and the elastic tube (7) are sequentially communicated end to form a closed loop, and the fourth liquid channel (22) is arranged close to the blade (3);
the section of the second liquid channel (5) is trapezoid, and the lower end of the second liquid channel is narrow and the upper end of the second liquid channel is wide; the second liquid channel (5) is obliquely arranged, and the lower end of the second liquid channel is obliquely outwards; a thermal expansion piston (8) is slidably matched in the second liquid channel (5); a first cooling groove (9) is formed in the drill bit matrix (1) near the periphery of the second liquid channel (5), the cooling channel is communicated with the first cooling groove (9), and cooling medium is injected into the cooling channel and the first cooling groove (9);
a trigger piece is arranged in the first liquid channel (4) or the first cooling groove (9), and the trigger piece is matched with the refrigerator (15);
a heat dissipation groove (6) is formed in the drill bit base body (1), and the elastic tube (7) is fixedly arranged in the heat dissipation groove (6).
2. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: a heat conducting fin (10) is arranged in the blade (3), one side of the heat conducting fin (10) is close to the working surface of the blade (3), and the other side of the heat conducting fin (10) is close to the lower end of the heat exchange medium loop; the lower end of the second liquid channel (5) is close to the heat conducting fin (10).
3. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: the trigger piece comprises a trigger ball (11) and a touch switch (12);
the trigger ball (11) is movably arranged in the first liquid channel (4); the trigger ball (11) is provided with a plurality of through holes; the trigger ball (11) is a light ball;
the touch switch (12) is fixedly arranged at the upper end of the first liquid channel (4); the trigger ball (11) is matched with the touch switch (12);
the first liquid channel (4) is positioned above the second liquid channel (5);
the touch switch (12) is electrically connected with the refrigerator (15) through a controller.
4. A hybrid drill bit for enhancing core cutting functionality as recited in claim 3, wherein: the lower end of the first liquid channel (4) is fixedly connected with a first limiting piece (13); one end of the first limiting piece (13) is communicated with the first liquid channel (4); the other end of the first limiting piece (13) is communicated with the upper end of the second liquid channel (5) through a first communication pipe;
the upper end of the first liquid channel (4) is fixedly connected with a second limiting part (14), and the upper end of the second limiting part (14) is communicated with the elastic tube (7) through a second communicating tube;
the first limiting piece (13) and the second limiting piece (14) are used for preventing the trigger ball (11) from being separated from the first liquid channel (4).
5. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: a second cooling groove (21) is formed in the drill bit matrix (1) near the periphery of the third liquid channel (16); the second cooling groove (21) is filled with cooling medium, and the second cooling groove (21) is communicated with the cooling channel.
6. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: the trigger piece is a temperature sensor, the temperature sensor is arranged in the first cooling groove (9), and the refrigerator (15) and the temperature sensor are electrically connected with the controller.
7. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: the cross-sectional area of the lower end of the second liquid channel (5) is larger than that of the first liquid channel (4); the cross-sectional area of the lower end of the second liquid channel (5) is larger than the cross-sectional area of the fourth liquid channel (22).
8. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: the upper end of the drill bit matrix (1) is provided with a connecting seat (2).
9. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: the plurality of blades (3) are distributed at the bottom end of the drill bit matrix (1) in a fan shape; the lower end of each blade (3) is fixedly provided with a plurality of cylindrical first diamond mosaic pieces (17); the root of the first diamond inlay (17) is embedded into the blade (3), and the end part of the first diamond inlay (17) protrudes out of the lower end surface of the blade (3).
10. A hybrid drill bit for enhanced core cutting functionality as recited in claim 1, wherein: the lower end face of the movable cutting tooth (18) is an inclined plane, and a plurality of cylindrical second diamond mosaic (20) are fixedly arranged on the inclined plane; the root of the second diamond inlay (20) is embedded into the movable cutting tooth (18), and the end part of the second diamond inlay (20) protrudes out of the lower end surface of the movable cutting tooth (18); a limit mounting groove is formed in the bottom of the drill bit matrix (1); a stop block is fixedly arranged at the upper end of the movable cutting tooth and is in limit sliding fit with the limit mounting groove; a spring (19) is abutted between the stop block and the bottom wall of the limit mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310024819.0A CN115788311B (en) | 2023-01-09 | 2023-01-09 | Hybrid drill bit with reinforced core cutting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310024819.0A CN115788311B (en) | 2023-01-09 | 2023-01-09 | Hybrid drill bit with reinforced core cutting function |
Publications (2)
| Publication Number | Publication Date |
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| CN115788311A CN115788311A (en) | 2023-03-14 |
| CN115788311B true CN115788311B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310024819.0A Active CN115788311B (en) | 2023-01-09 | 2023-01-09 | Hybrid drill bit with reinforced core cutting function |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8418481D0 (en) * | 1984-07-19 | 1984-08-22 | Nl Petroleum Prod | Rotary drill bits |
| CN2235011Y (en) * | 1995-02-09 | 1996-09-11 | 石油大学(华东) | Hydraulic auxiliary rock-breaking bit with self-sharpening cutting teeth |
| GB9509555D0 (en) * | 1995-05-11 | 1995-07-05 | Camco Drilling Group Ltd | Improvements in or relating to rotary drill bits |
| CN105804662B (en) * | 2016-04-05 | 2017-12-29 | 武汉亿斯达工具有限公司 | Duplex bearing freely-supported beam type Hob for cutting rock and its hybrid PDC drill bit |
| CN106014266B (en) * | 2016-08-02 | 2019-05-10 | 西南石油大学 | A kind of dise knife formula composite drill bit suitable for bad ground |
| CN205840787U (en) * | 2016-08-02 | 2016-12-28 | 西南石油大学 | A kind of long-life drill bit being applicable to bad ground |
| CN106089088B (en) * | 2016-08-02 | 2018-10-09 | 西南石油大学 | A kind of long-life drill bit suitable for bad ground |
| CN205876194U (en) * | 2016-08-02 | 2017-01-11 | 西南石油大学 | Disc cutter formula composite drill bit suitable for bad ground |
| CN114645676A (en) * | 2022-04-02 | 2022-06-21 | 西南石油大学 | PDC drill bit with adjustable nozzle on blade |
| CN115370295B (en) * | 2022-08-12 | 2023-07-14 | 中煤科工集团西安研究院有限公司 | PDC drill bit shocks resistance with buffering shock-absorbing function |
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| CN115788311A (en) | 2023-03-14 |
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Effective date of registration: 20230413 Address after: 257200 No.9, Yanghe Road, economic development zone, Hekou District, Dongying City, Shandong Province Applicant after: SHENGLI OIL FIELD WANHE OIL CONSTRUCTION TECHNIQUE LIMITED LIABILITY Co.,Ltd. Applicant after: China University of Petroleum (Beijing) Address before: 257200 No.9, Yanghe Road, economic development zone, Hekou District, Dongying City, Shandong Province Applicant before: SHENGLI OIL FIELD WANHE OIL CONSTRUCTION TECHNIQUE LIMITED LIABILITY Co.,Ltd. |
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