A high pressure water cutting drilling system

Abstract

The application relates to the technical field of geological drilling, in particular to a high-pressure water cutting drilling system, which comprises a drilling machine, a drill rod, a core tube, a drill bit and a high-pressure water supply device, the drill bit is installed at the bottom end of the core tube, and the drilling machine drives the core tube to rotate through the drill rod; a plurality of high-pressure water guide holes are arranged in the wall of the core tube, a water outlet guide hole which is in communication with the high-pressure water guide holes is arranged in the wall of the drill bit, and the high-pressure water supply device supplies water to the high-pressure water guide holes through the drill rod. During the drilling operation, the high-pressure water supply device provides high-pressure water through the drill rod, and the high-pressure water is sprayed from the drill bit position through the high-pressure water guide holes and the water outlet guide hole; meanwhile, the drilling machine drives the core tube and the drill bit to rotate through the drill rod, so that the high-pressure water can be rotated and cut to drill. The high-pressure water supply cutting is realized through the high-pressure water guide holes in the wall, the cores in the core tube can keep relatively complete original shapes, and the cores are beneficial to subsequent research work.

Description

Technical Field

[0001] The present application relates to the field of geological drilling technology, and in particular to a high-pressure water cutting drilling system. Background Art

[0002] At present, during the drilling process, a drilling rig, a drill pipe, a core barrel and a drill bit installed at the bottom of the core barrel are usually linked together. The drilling rig drives the core barrel to rotate through the drill pipe to control the drill bit to perform rotary drilling.

[0003] At the same time, most drilling systems are usually equipped with water supply equipment to supply water to the inside of the core tube through the drill pipe, so that water flows to the drill bit position to cool the drill bit, and at the same time can bring out muddy water upward along the drilling direction.

[0004] However, traditional drilling methods utilize alloy plates and corundum embedded in the drill bit to abrasively cut the rock. Cutting speed is controlled by the rock thickness, drill bit rotational speed, rock type, and the compatibility of the drill bit with the rock's hardness. Furthermore, during operation, water flowing from the core barrel to the drill bit directly erodes and damages the core within the barrel, preventing it from retaining its original shape and hindering subsequent core analysis. Therefore, further improvements are possible. Summary of the Invention

[0005] In order to enable the core in the core tube to retain a relatively complete original shape, so as to facilitate subsequent research work on the core, the present application provides a high-pressure water cutting drilling system.

[0006] The high-pressure waterjet drilling system provided in this application adopts the following technical solutions:

[0007] A high-pressure waterjet drilling system comprises a drilling rig, a drill rod, a core barrel, a drill bit and a high-pressure water supply device. The drill bit is mounted at the bottom end of the core barrel, and the drilling rig drives the core barrel to rotate via the drill rod. A plurality of high-pressure water guide holes are provided in the wall of the core barrel, arranged along its circumference and penetrating the upper and lower sides of the core barrel. The drill rod is a hollow rod connected to the high-pressure water guide holes. The high-pressure water supply device supplies water to the high-pressure water guide holes via the drill rod. A plurality of water outlet guide holes are provided in the wall of the drill bit, and are connected to the high-pressure water guide holes in a one-to-one correspondence.

[0008] By adopting the above technical solution, during the drilling process, the high-pressure water supply equipment supplies high-pressure water into the drill pipe. The high-pressure water is transported through the high-pressure water guide hole in the core barrel and the water outlet guide hole in the drill bit before being ejected. At the same time, the drilling rig drives the core barrel and drill bit through the drill pipe to rotate, so that the high-pressure water ejected from the water outlet guide hole at the drill bit position can be rotated to cut and drill. The use of high-pressure water guide holes in the pipe wall for water supply not only achieves high-pressure water supply and cutting, but also allows the core inside the core barrel to retain a relatively complete original shape, which is conducive to subsequent core research.

[0009] Optionally, the drill bit includes a drill barrel and a plurality of drill bit alloy sheets fixedly installed at the bottom end of the drill barrel, the water outlet guide hole is opened in the drill barrel, and a head hiding groove is opened at the bottom end of the drill barrel at a position corresponding to each water outlet guide hole, so that an alloy sheet pillar for installing the drill bit alloy sheet is formed between two adjacent head hiding grooves, and the bottom end of the drill bit alloy sheet is lower than the alloy sheet pillar; a high-pressure water nozzle connected to the water outlet guide hole is installed in the head hiding groove, and the high-pressure water nozzle is completely hidden in the head hiding groove.

[0010] By adopting this technical solution, during operation, high-pressure water is sprayed through the water outlet guide hole and high-pressure water nozzle to cut and cool the drill bit. At the same time, the drill bit continuously scrapes the geology with the drill bit alloy plate to assist the continuous rotation of the high-pressure water in the cutting and drilling process.

[0011] Optionally, the drill rod and the core tube are detachably connected via a connector, a connecting hole for connecting the drill rod is provided on the top of the connector, a plurality of water inlet guide holes corresponding one-to-one to the high-pressure water guide holes are provided in the wall of the connector, and the water inlet guide holes are connected to the connecting holes.

[0012] By adopting the above technical solution, during the working process, the high-pressure water supply equipment transports high-pressure water into the drill rod. The high-pressure water in the drill rod can flow into the high-pressure water guide hole through the water inlet guide hole, and then be sprayed through the water outlet guide hole and high-pressure water nozzle in the drill bit to perform auxiliary cutting and cooling work.

[0013] Optionally, the core tube includes multiple unit tubes, and the upper and lower ends of each unit tube are integrally formed into a male joint and a female joint, and the male joint and the female joint between two adjacent unit tubes are threadedly connected by internal and external threads.

[0014] By adopting the above technical solution, due to the wall thickness limitation of the core tube, it is difficult to process the entire core tube into shape at one time during the processing of the core tube. However, segmenting the core tube into multiple unit tubes can reduce the processing difficulty and facilitate the processing of the core tube.

[0015] Optionally, annular anti-dislocation water guide grooves are provided at the upper and lower ends of the unit tube at the positions of the high-pressure water guide holes, and the high-pressure water guide holes are connected in series by the annular anti-dislocation water guide grooves.

[0016] By adopting the above technical solution, during the threaded splicing process of the unit tubes, due to machining precision issues, the high-pressure water guide holes on two adjacent unit tubes are easily misaligned after splicing, affecting subsequent water flow. However, by providing an annular anti-misalignment water guide groove, the high-pressure water guide holes can be connected in series. Even if the high-pressure water guide holes in two adjacent units are misaligned, they can still be connected through the annular anti-misalignment water guide groove.

[0017] Optionally, a core protection tube is installed in the core tube, and a hanger with a hanging head is fixedly installed on the top of the core protection tube. Correspondingly, a hanging seat for removably hanging the hanger is provided on the inner top of the connecting head, and the hanger can slide vertically relative to the hanging seat and can also rotate vertically relative to the hanging seat; a pre-loading spring is also installed between the core protection tube and the connecting head, and the pre-loading spring is sleeved on the hanging seat, and the top of the pre-loading spring is supported on the connecting head, and the bottom of the pre-loading spring is supported on the core protection tube.

[0018] By adopting the above technical solution, during the drilling process, the pre-load spring pushes the bottom end of the core protection tube downward, allowing it to pre-embed into the soil or rock layer corresponding to the drill bit. This allows the core to be pre-embedded and protected by the core tube, preventing it from being damaged by the jet nozzle. Furthermore, as the drill rod drives the core tube to drill the hole, the core protection tube remains stationary because the boom can rotate vertically relative to the lifting base.

[0019] Optionally, the lifting seat includes two lifting plates arranged opposite to each other on the left and right, two pairs of lifting rods are fixed in the connecting head, the two lifting plates are rotatably installed on the two pairs of lifting rods, and the two lifting plates are pulled by the lifting head and rotated open in the horizontal direction during the process of removing the core protection tube, and the two lifting plates are pushed by the core protection tube during the process of installing the core protection tube and rotated and spliced; semicircular guide holes are opened on the opposite sides of the two lifting plates, and after the two lifting plates are rotated and spliced, the two semicircular guide holes are matched to form guide holes for the lifting rods to slide through; the two pairs of lifting rods are installed on the opposite sides There is a hanging rod arranged horizontally and longitudinally, and two pairs of lifting rods are provided with horizontally and transversely arranged reset slides on the opposite sides. A reset slider and a reset spring are installed in the reset slide. The reset slider is slidably installed in the reset slide, and the reset spring is supported on the reset slider. The two ends of the hanging rod are respectively installed with two reset sliders on the corresponding side; hooks are fixed on the opposite sides of the two lifting plates, and the hooks can be hooked to the corresponding hanging rods and locked after the two lifting plates are actively spliced ​​together, and the hooks can be disengaged from the hanging rods and unlocked when the two lifting plates are rotated open with a certain external force applied.

[0020] By adopting the above technical solution, during the installation of the core protection tube, workers insert the core protection tube into the core tube. At this time, the core protection tube pushes the two lifting plates and rotates them together, allowing the hook to hook onto the hanging rod and lock it. At the same time, after the two lifting plates are assembled, the two semicircular guide holes align and surround the hanging rod, allowing the hanging rod to slide vertically relative to the lifting seat and rotate vertically relative to the lifting seat. During the removal of the core protection tube, workers apply a certain external force to pull out the core protection tube, causing the lifting head to press down on the two lifting plates, forcing the hook to disengage from the hanging rod, allowing the lifting plates to rotate open horizontally, removing the core protection tube and the core inside the core protection tube for research.

[0021] Optionally, a first pressure relief hole is provided on the top of the core protection tube and passes through both sides of the core protection tube; and a second pressure relief hole is provided on the connector and passes through both sides of the connector.

[0022] By adopting the above technical solution, as the drilling depth increases, the core is continuously grabbed and filled into the core protection tube. Since the core protection tube is connected to the outside through the first pressure relief hole and the second pressure relief hole, the air pressure in the core protection tube can be balanced, which facilitates the gradual grabbing and filling of the core by the core protection tube.

[0023] Optionally, the high-pressure water supply equipment includes a high-pressure water supply pump, a filter, a water supply pipe, a pool and a circulating water pump, the circulating water pump is used to pump the muddy water brought out into the pool through the water pipe for reuse; a water supply port is provided at the top of the drill rod, and a rotary faucet connected to the water supply port is installed at the water supply port of the drill rod, the high-pressure water supply pump pumps the water in the pool to the rotary faucet through the water pipe; the filter is installed between the pool and the high-pressure water supply pump, and the filter is used to filter the water pumped by the high-pressure water supply pump in the pool.

[0024] By adopting this technical solution, during the drilling process, a high-pressure water supply pump draws water through a pipe into a rotary faucet. This water then flows through the water supply port into the drill pipe and into the drill bit through the high-pressure water guide hole for jet cutting and cooling. Simultaneously, the high-pressure water after jet cutting moves upward along the drilling direction, removing muddy water. It is then pumped through the pipe by a circulating water pump into a reservoir for reuse. The filtered water also carries a certain amount of fine particles, which enhances the subsequent high-pressure water cutting effect.

[0025] Optionally, the filter includes multiple filter layers, and the pore sizes of the multiple filter layers decrease sequentially from the outside to the inside.

[0026] By adopting the above technical solution, during use, the filter can filter the water pumped by the high-pressure water supply pump in the pool step by step through multiple filter layers to obtain water with a certain amount of fine particles for the high-pressure water supply pump to pump.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. During the drilling process, the high-pressure water supply equipment supplies high-pressure water into the drill pipe. The high-pressure water is transported through the high-pressure water guide holes in the core tube and the water outlet guide holes in the drill bit before being ejected. At the same time, the drilling rig drives the core tube and drill bit to rotate through the drill pipe, so that the high-pressure water ejected from the water outlet guide holes at the drill bit position can be rotated to cut and drill. The use of high-pressure water guide holes in the pipe wall for water supply can not only achieve high-pressure water supply and cutting, but also keep the core in the core tube relatively intact in its original shape, which is conducive to subsequent core research.

[0029] 2. Due to the wall thickness limitation of the core tube, it is difficult to process the entire core tube in one go during the processing of the core tube. However, segmenting the core tube into multiple unit tubes can reduce the processing difficulty and facilitate the processing of the core tube;

[0030] 3. During the threaded splicing of unit tubes, due to machining precision issues, the high-pressure water guide holes on two adjacent unit tubes can easily become misaligned after splicing, affecting subsequent water flow. However, by providing an annular anti-misalignment water guide groove, the high-pressure water guide holes can be connected in series. Even if the high-pressure water guide holes in two adjacent units are misaligned, they can still be connected through the annular anti-misalignment water guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of this application.

[0032] Figure 2 This is a cross-sectional view of the structure of the drill pipe, core barrel, drill bit, and core protection tube after partial assembly in this application.

[0033] Figure 3 It is a cross-sectional view of a single unit tube in this application.

[0034] Figure 4 It is a top view of a single unit tube in this application.

[0035] Figure 5 It is a structural diagram of the connection position between the connector and the core protection tube in this application.

[0036] Figure 6 It is a cross-sectional view of the drill bit in this application.

[0037] Figure 7 It is the main view of the lifting seat in this application.

[0038] Figure 8 It is a top view of the lifting seat in this application.

[0039] Figure 9 This is a schematic diagram of a single hanging plate in this application when it rotates until the hook begins to be fastened to the hanging rod.

[0040] Figure 10 This is a schematic diagram of a single hanging plate in this application after being rotated until the hook is fully engaged with the hanging rod.

[0041] Description of reference numerals:

[0042] 1. Drilling rig; 2. Drill pipe; 3. Core barrel; 31. High-pressure water guide hole; 32. Unit pipe; 33. Male connector; 34. Female connector; 35. Annular anti-dislocation water guide groove; 4. Drill bit; 41. Water outlet guide hole; 42. Drill barrel; 43. Drill bit alloy plate; 44. Alloy plate support; 45. Head storage groove; 46. High-pressure water nozzle; 5. High-pressure water supply equipment; 51. High-pressure water supply pump; 52. Filter; 53. Water tank; 54. Circulating water pump; 55. Rotary Faucet; 6. Connecting head; 61. Water inlet guide hole; 62. Connecting hole; 7. Core protection tube; 71. Lifting head; 72. Lifting rod; 73. Push-up seat; 74. Push-up cone; 75. First pressure relief hole; 76. Second pressure relief hole; 8. Lifting seat; 81. Lifting plate; 82. Semicircular guide hole; 83. Lifting rod; 84. Reset slide; 85. Reset slider; 86. Reset spring; 87. Hanging rod; 88. Hook; 89. Hook mouth; 9. Pre-load spring. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-10 This application is described in further detail.

[0044] The embodiment of the present application discloses a high-pressure water cutting drilling system.

[0045] Reference Figure 1 The high-pressure waterjet drilling system includes a drilling rig 1, a drill rod 2, a core barrel 3, a drill bit 4, and a high-pressure water supply device 5. The drill bit 4 is mounted on the bottom end of the core barrel 3, which is then mounted on the bottom end of the drill rod 2 via a connector 6. The drill rod 2 and connector 6 are directly threaded together using internal and external threads, while the core barrel 3 and connector 6 are also threaded together using internal and external threads. During drilling, the drilling rig 1 drives the core barrel 3 and drill bit 4 to rotate via the drill rod 2.

[0046] Reference Figure 1 、 2 In this embodiment, the core tube 3 has multiple high-pressure water guide holes 31 arranged along its circumference and extending through the upper and lower sides of the core tube 3. Correspondingly, the drill rod 2 is a hollow rod, and the high-pressure water supply device 5 supplies high-pressure water to the drill rod 2. The connector 6 has multiple water inlet guide holes 61 formed in the wall thereof, each corresponding to the high-pressure water guide holes 31. A connecting hole 62 is formed at the top of the connector 6, through which the drill rod 2 is threadedly connected via internal and external threads. The top ends of the water inlet guide holes 61 in the connector 6 are connected to the connecting hole 62. The drill bit 4 is threadedly connected to the bottom end of the core tube 3, and the drill bit 4 has multiple water outlet guide holes 41 formed in the wall thereof, each corresponding to the high-pressure water guide holes 31, thereby connecting the drill rod 2, the water inlet guide holes 61, the high-pressure water guide holes 31, and the water outlet guide holes 41.

[0047] During the drilling process, the high-pressure water supply device 5 supplies high-pressure water into the drill pipe 2. The high-pressure water is transported through the water inlet guide hole 61 in the connector 6, the high-pressure water guide hole 31 in the core barrel 3, and the water outlet guide hole 41 in the drill bit 4, before being ejected at the bottom of the drill bit 4. Simultaneously, the drilling rig 1 drives the core barrel 3 and drill bit 4 to rotate via the drill pipe 2, allowing the high-pressure water ejected from the water outlet guide hole 41 at the bottom of the drill bit 4 to perform a rotary cutting operation, thereby drilling. Furthermore, during the high-pressure water rotary cutting drilling process, the rotation of the drill bit 4 assists the high-pressure water's cutting action, scraping the geological formations being cut by the high-pressure water and assisting the continuous cutting work of the high-pressure water. Furthermore, during the jet cutting process, the high-pressure water not only cools the drill bit 4 but also carries muddy water upward along the drilling direction. Furthermore, using the high-pressure water guide hole 31 in the pipe wall for water supply not only enables high-pressure water supply and cutting, but also allows the core inside the core barrel 3 to retain a relatively intact original shape, facilitating subsequent core research.

[0048] Reference Figure 1 Specifically, the high-pressure water supply equipment 5 includes a high-pressure water supply pump 51, a filter 52, a pool 53, and a circulating water pump 54. The circulating water pump 54 is used to pump the muddy water brought out into the pool 53 through a water pipe for reuse. A water supply port is opened at the top of the drill pipe 2, and a rotary faucet 55 connected to the water supply port is installed at the drill pipe 2. The high-pressure water supply pump 51 draws water from the pool 53 to the rotary faucet 55 through a water pipe. The filter 52 is installed between the pool 53 and the high-pressure water supply pump 51, and the filter 52 is used to filter the water pumped by the high-pressure water supply pump 51 in the pool 53.

[0049] During the drilling process, the high-pressure water supply pump 51 pumps water through a pipe into a rotary tap 55. This water then flows through the water supply port into the drill pipe 2 and into the drill bit 4 through the high-pressure water guide hole 31 for jet cutting and cooling. Simultaneously, the high-pressure water after jet cutting moves upward along the drilling direction, removing muddy water. It is then pumped through the pipe by the circulating water pump 54 into the water tank 53 for reuse. The filtered water also carries a certain amount of fine particles, which enhances the subsequent high-pressure water cutting effect.

[0050] In this embodiment, filter 52 is immersed in pool 53. It comprises multiple filter layers made of filter cotton, each wrapped from the inside outward, with the pore size decreasing from the outside inward. The water inlet of the high-pressure water supply pump 51 is connected to the inner filter layer via a water pipe. During use, filter 52 filters the water pumped from pool 53 by the high-pressure water supply pump 51 through the multiple filter layers, obtaining water with a certain amount of fine-grained filter sand for the high-pressure water supply pump 51 to draw.

[0051] Reference Figure 2 、3 Specifically, the core barrel 3 comprises multiple unit tubes 32. Each unit tube 32 has a male connector 33 and a female connector 34 integrally formed at its upper and lower ends. The male connectors 33 and female connectors 34 between two adjacent unit tubes 32 are threadedly connected via internal and external threads. Due to the limited wall thickness of the core barrel 3, it is difficult to form the entire core barrel 3 in one operation. However, segmenting the core barrel 3 into multiple unit tubes 32 reduces the processing difficulty and facilitates the processing of the core barrel 3.

[0052] Reference Figure 3 、 4 In this embodiment, annular anti-misalignment water guide grooves 35 are provided at the upper and lower ends of the unit tubes 32 at the locations of the high-pressure water guide holes 31, and the high-pressure water guide holes 31 are connected in series by the annular anti-misalignment water guide grooves 35. During the threaded splicing of the unit tubes 32, due to machining accuracy issues, the high-pressure water guide holes 31 of two adjacent unit tubes 32 can easily become misaligned after splicing, affecting subsequent water flow. However, by providing the annular anti-misalignment water guide grooves 35, the high-pressure water guide holes 31 can be connected in series. Even if the high-pressure water guide holes 31 in two adjacent unit tubes are misaligned, they can still be connected through the annular anti-misalignment water guide grooves 35.

[0053] Reference Figure 5 Similarly, the bottom end of the connector 6 is also provided with an annular anti-dislocation water guide groove 35 that connects the water inlet guide hole 61 in series. During the connection process between the core barrel 3 and the connector 6, even if the water inlet guide hole 61 in the connector 6 and the high-pressure water guide hole 31 in the core barrel 3 are misaligned, they can still communicate through the annular anti-dislocation water guide groove 35.

[0054] Reference Figure 6 Specifically, the drill bit 4 includes a drill barrel 42 and a plurality of drill bit alloy plates 43 fixedly mounted at the bottom end of the drill barrel 42, and a water outlet guide hole 41 is provided in the drill barrel 42. A drill bit recess 45 is provided at the bottom end of the drill barrel 42 at a position corresponding to each water outlet guide hole 41, so that an alloy plate support 44 for mounting the drill bit alloy plate 43 is formed between two adjacent drill bit recesses 45, and the bottom end of the drill bit alloy plate 43 is lower than the alloy plate support 44. A high-pressure water nozzle 46 threadedly connected to the water outlet guide hole 41 is installed in the drill bit recess 45, and the high-pressure water nozzle 46 is completely hidden in the drill bit recess 45. During operation, high-pressure water is sprayed, cut, and cooled at the drill bit 4 position through the water outlet guide hole 41 and the high-pressure water nozzle 46. At the same time, the drill bit 4 continuously scrapes the geology through the drill bit alloy plates 43 to assist the continuous rotation, cutting, and drilling work of the high-pressure water.

[0055] Similarly, an annular anti-dislocation water guide groove 35 is also provided at the top of the drill tube 42, connecting the water outlet guide hole 41 in series. During the connection between the drill bit 4 and the core protection tube 7, even if the water outlet guide hole 41 in the drill bit 4 and the high-pressure water guide hole 31 in the core tube 3 are misaligned, they can still communicate through the annular anti-dislocation water guide groove 35.

[0056] In this embodiment, sealing grooves and sealing flanges embedded in the sealing grooves are provided at the connection position between the connector 6 and the adjacent unit tube 32, the connection position between two adjacent unit tubes 32, and the connection position between the drill bit 4 and the adjacent unit tube 32.

[0057] Reference Figure 2 、 5 A core protection tube 7 is inserted and installed in the core tube 3. A suspension rod 72 with a suspension head 71 is fixedly installed on the top of the core protection tube 7. The radial profile of the suspension rod 72 is smaller than that of the suspension head 71. Correspondingly, a suspension seat 8 is provided on the inner top of the connector 6 for the suspension rod 72 to be removably mounted. The suspension rod 72 can slide vertically relative to the suspension seat 8 and can also rotate vertically relative to the suspension seat 8. A pre-load spring 9 is also installed between the core protection tube 7 and the connector 6. The pre-load spring 9 is sleeved on the suspension seat 8. The top of the pre-load spring 9 is supported on the connector 6, and the bottom of the pre-load spring 9 is supported on the core protection tube 7.

[0058] During drilling, the pre-load spring 9 pushes the bottom end of the core protection tube 7 downward, allowing it to pre-engage in the soil or rock layer corresponding to the drill bit 4. This allows the core to be pre-engaged and protected by the core tube 3, preventing it from being damaged by the jet nozzle. Furthermore, as the drill rod 2 drives the core tube 3 to drill, the suspension rod 72 can rotate vertically relative to the suspension seat 8 on the connector 6, allowing the core protection tube 7 to remain stationary.

[0059] Reference Figure 7 、 8 Specifically, the lifting base 8 includes two lifting plates 81 disposed opposite each other, each with a semicircular guide hole 82 formed on one side of the two lifting plates 81. Two pairs of lifting rods 83 are fixed to the top of the inner wall of the connector 6, and the two pairs of lifting rods 83 are arranged on the left and right sides. The two lifting plates 81 are respectively mounted on the two pairs of lifting rods 83 with one end facing away from each other, and are rotated horizontally and longitudinally around the two pairs of lifting rods 83, allowing the two lifting plates 81 to rotate relative to each other in the horizontal and longitudinal directions to open and close.

[0060] When the two hanging plates 81 are rotated and assembled, the two semicircular guide holes 82 are aligned to form a guide hole for the hanging rod 72 to slide through, so as to embrace the hanging rod 72 so that the hanging rod 72 can slide vertically relative to the hanging seat 8 and can also rotate vertically relative to the hanging seat 8.

[0061] Reference Figure 5 、 7 The top of the core protection tube 7 is coaxially fixed with an upper push seat 73, and the pre-pushing spring 9 is positioned and installed on the upper push seat 73. The inner side of the upper push seat 73 is integrally formed with an upper push cone 74 that closes from top to bottom. When the hanging plate 81 is fully opened, the end of the hanging plate 81 contacts the upper push cone 74. During the removal of the core protection tube 7, the lifting head 71 pulls the two hanging plates 81 to rotate and open in the horizontal direction; at the same time, during the installation of the core protection tube 7, the upper push seat 73 pushes the hanging plates 81 inward to a certain angle through the upper push cone 74, and then the core protection tube 7 continues to push the two hanging plates 81 to rotate and splice.

[0062] Reference Figure 7 、 8 Horizontally disposed return chutes 84 are provided on opposite sides of the two pairs of lifting rods 83. Return slides 85 and return springs 86 are mounted within return slides 84. Return slides 85 are slidably mounted within return slides 84, while return springs 86 support return slides 85. Horizontally disposed hangers 87 are mounted on opposite sides of the two pairs of lifting rods 83. The ends of hangers 87 are pivotally connected to the two return slides 85 on the corresponding side. Correspondingly, hooks 88 are fixed to opposite sides of the two lifting plates 81. Hook openings 89 in hooks 88 are arc-shaped, with the center of the hook openings 89 positioned slightly inward and upward relative to the center of the hangers 87.

[0063] Reference Figure 7 、 9 10. During the installation of the core protection tube 7, the worker inserts the core protection tube 7 into the core tube 3. At this time, the upper push seat 73 cooperates with the core protection tube 7 to push the two hanging plates 81 to rotate. When the hook 88 in the hanging plate 81 rotates with the hanging plate 81 to the position of the hanging rod 87, the outer side of the opening of the hook mouth 89 in the hook 88 abuts against the top eccentric side of the outer side of the hanging rod 87, pressing the reset slider 85 to retract; then the hanging plate 81 continues to rotate to the spliced ​​state, causing the reset slider 85 to be pushed out by the reset spring 86 to reset and rebound, snapping the hanging rod 87 into the hook mouth 89 of the hook 88, and causing the inner side of the opening of the hook mouth 89 in the hook 88 to abut against the bottom eccentric side of the outer side of the hanging rod 87, forming a locking state.

[0064] Reference Figure 7 、 10At the same time, in the process of taking out the core protection tube 7, the worker applies a certain external force to pull out the core protection tube 7, and the lifting head 71 in the lifting rod 72 pulls the two lifting plates 81 to rotate and open. At this time, the hook 88 applies a horizontal inward thrust component to the hanging rod 87 to press the reset slider 85 to retract and disengage the hook 88 from the hanging rod 87 to unlock it, so that the lifting plate 81 can be pulled by the lifting head 71 around the horizontal longitudinal direction and rotated open to take out the core protection tube 7 and the core in the core protection tube 7 for research.

[0065] Reference Figure 5 The top of the core protection tube 7 is provided with a first pressure relief hole 75 that runs through both the inside and outside of the core protection tube 7. Correspondingly, the connector 6 is provided with a second pressure relief hole 76 that runs through both the inside and outside of the connector 6. As drilling depth increases, core is continuously captured and filled into the core protection tube 7. Because the core protection tube 7 is connected to the outside through the first and second pressure relief holes 75 and 76, the air pressure inside the core protection tube 7 is balanced, facilitating the gradual capture and filling of the core by the core protection tube 7.

[0066] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A high-pressure waterjet drilling system, characterized by: The invention comprises a drilling rig (1), a drill rod (2), a core tube (3), a drill bit (4) and a high-pressure water supply device (5); the drill bit (4) is installed at the bottom end of the core tube (3); and the drilling rig (1) drives the core tube (3) to rotate through the drill rod (2); The core tube (3) is provided with a plurality of high-pressure water guide holes (31) arranged along its circumference and penetrating the upper and lower sides of the core tube (3); the drill rod (2) is a hollow rod connected to the high-pressure water guide hole (31); the drill rod (2) and the core tube (3) are detachably connected via a connector (6); a connecting hole (62) for connecting the drill rod (2) is provided at the top of the connector (6); a plurality of water inlet guide holes (61) corresponding to and connected to the high-pressure water guide holes (31) are provided in the wall of the connector (6); the water inlet guide holes (61) are connected to the connecting holes (62); and the high-pressure water supply device (5) supplies water to the high-pressure water guide hole (31) via the drill rod (2); A plurality of water outlet guide holes (41) corresponding to and communicating with the high-pressure water guide holes (31) are provided in the pipe wall of the drill bit (4); a hanging seat (8) for removably hanging a hanging rod (72) is provided on the inner top of the connecting head (6); the hanging seat (8) includes two hanging plates (81) arranged opposite to each other on the left and right; two pairs of hanging rods (83) are fixed in the connecting head (6); the two hanging plates (81) are respectively rotatably mounted on the two pairs of hanging rods (83); and the two hanging plates (81) are pulled by the hanging head (71) and rotated to open in the horizontal direction during the process of removing the core protection tube (7); and the two hanging plates (81) are rotated and spliced ​​together by the core protection tube (7) during the process of installing the core protection tube (7); A semicircular guide hole (82) is provided on one opposite side of the two hanging plates (81), and after the two hanging plates (81) are rotated and assembled, the two semicircular guide holes (82) are aligned to form a guide hole for the hanging rod (72) to slide through; A horizontal longitudinal hanging rod (87) is installed on the opposite side of the two pairs of hoisting rods (83); a horizontal transverse reset chute (84) is opened on the opposite side of the two pairs of hoisting rods (83); a reset slider (85) and a reset spring (86) are installed in the reset chute (84); the reset slider (85) is slidably installed in the reset chute (84); the reset spring (86) supports the reset slider (85); and the two ends of the hanging rod (87) are respectively installed on the two reset sliders (85) on the corresponding side; A hook (88) is fixed on the opposite side of the two hanging plates (81), and the hook (88) can be hooked on the corresponding hanging rod (87) to lock after the two hanging plates (81) are actively spliced ​​together. The hook (88) can be disengaged from the hanging rod (87) to unlock when the two hanging plates (81) are rotated and opened by applying a certain external force.

2. A high-pressure waterjet drilling system according to claim 1, characterized in that: The drill bit (4) comprises a drill barrel (42) and a plurality of drill bit alloy sheets (43) fixedly mounted on the bottom end of the drill barrel (42); the water outlet guide hole (41) is provided in the drill barrel (42); a head-hiding groove (45) is provided at the bottom end of the drill barrel (42) at a position corresponding to each water outlet guide hole (41); an alloy sheet support (44) for mounting the drill bit alloy sheet (43) is formed between two adjacent head-hiding grooves (45); and the bottom end of the drill bit alloy sheet (43) is lower than the alloy sheet support (44); A high-pressure water nozzle (46) connected to the water outlet guide hole (41) is installed in the head-hiding groove (45), and the high-pressure water nozzle (46) is completely hidden in the head-hiding groove (45).

3. The high-pressure waterjet drilling system according to claim 1, characterized in that: The core tube (3) comprises a plurality of unit tubes (32), wherein the upper and lower ends of each unit tube (32) are integrally formed into a male connector (33) and a female connector (34), and the male connector (33) and the female connector (34) between two adjacent unit tubes (32) are threadedly connected via internal and external threads.

4. A high-pressure waterjet drilling system according to claim 3, characterized in that: Annular anti-dislocation water guide grooves (35) are provided at the upper and lower ends of the unit tube (32) at the positions of the high-pressure water guide holes (31), and the high-pressure water guide holes (31) are connected in series by the annular anti-dislocation water guide grooves (35).

5. The high-pressure waterjet drilling system according to claim 1, characterized in that: A core protection tube (7) is installed in the core tube (3), and a suspension rod (72) with a suspension head (71) is fixedly installed on the top of the core protection tube (7). Correspondingly, the suspension rod (72) can slide vertically relative to the suspension seat (8) and can also rotate vertically relative to the suspension seat (8); A pre-load spring (9) is also installed between the core protection tube (7) and the connector (6). The pre-load spring (9) is sleeved on the hanging seat (8), and the top of the pre-load spring (9) is supported on the connector (6), while the bottom of the pre-load spring (9) is supported on the core protection tube (7).

6. The high-pressure waterjet drilling system according to claim 5, characterized in that: A first pressure relief hole (75) is provided on the top of the core protection tube (7) and penetrates both the inner and outer sides of the core protection tube (7); The connector (6) is provided with a second pressure relief hole (76) that passes through both the inner and outer sides of the connector (6).

7. The high-pressure waterjet drilling system according to claim 1, characterized in that: The high-pressure water supply equipment (5) includes a high-pressure water supply pump (51), a filter (52), a water pool (53), and a circulating water pump (54). The circulating water pump (54) is used to pump the muddy water brought out into the water pool (53) through a water pipe for reuse. A water supply port is provided at the top of the drill rod (2), and a rotary faucet (55) connected to the water supply port is installed at the position of the water supply port on the drill rod (2). The high-pressure water supply pump (51) draws water from the pool (53) to the rotary faucet (55) through a water pipe. The filter (52) is installed between the water pool (53) and the high-pressure water supply pump (51), and the filter (52) is used in the water pool (53) to filter the water pumped by the high-pressure water supply pump (51).

8. The high-pressure waterjet drilling system according to claim 7, characterized in that: The filter (52) comprises multiple filter layers, and the filter pore diameters of the multiple filter layers decrease sequentially from the outside to the inside.

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