Drilling and coring equipment and drilling and coring method

Abstract

The invention relates to the technical field of geological exploration, in particular to drilling and coring equipment and a drilling and coring method.The drilling and coring equipment comprises a vertically-arranged drill rod, the drill rod comprises an inner pipe, an outer pipe, a turbine and a drill bit, the outer pipe is arranged on the outer side of the inner pipe in a sleeving mode at intervals, and a containing hole penetrating in the vertical direction is defined by the outer pipe and the inner pipe; the turbine is arranged in the containing hole, the turbine and the drill bit are arranged on the outer side of the inner pipe in a sleeving mode, the turbine is rotationally connected to the outer side wall of the inner pipe, the drill bit is fixedly arranged on the bottom face of the turbine, the drill bit is flush with or protrudes out of the bottom face of the inner pipe and the bottom face of the outer pipe, and a first spraying hole penetrating to the inner side face of the inner pipe is formed in the top face or the outer side face of the inner pipe; in conclusion, the mechanical disturbance generated in the drilling and coring process of the drilling and coring equipment is small, a complete rock core sample can be obtained, and great help can be provided for follow-up rock core analysis and research.

Description

Technical Field

[0001] The present invention relates to the technical field of geological exploration, and in particular to a coring equipment and a coring method. Background Art

[0002] Currently, in specialized fields such as geological exploration, construction engineering surveys, and geotechnical engineering testing, which place stringent requirements on analyzing underground geological conditions, core drilling technology is a key means of obtaining in-situ core samples. Collecting core samples from underground strata using drilling equipment provides first-hand, physical data for engineering design, geological hazard assessment, and resource exploration. The quality of these samples directly impacts the accuracy of subsequent laboratory test analysis, numerical simulation calculations, and on-site engineering decisions. In particular, in critical engineering scenarios such as high-rise building foundation surveys, bridge pile foundation testing, and tunnel surrounding rock stability assessments, complete core samples with well-developed surface morphology are essential for conducting key research, including rock mineral composition analysis, mechanical strength testing, and microstructural observations.

[0003] The traditional coring process used by existing drilling equipment generally relies on the overall rotation of the drill pipe column to achieve rock breaking and coring. This technical solution has exposed significant flaws in actual engineering applications: when the drill pipe drives the drill bit to rotate and cut the entire cross-section, the high-speed rotation of the drill pipe system will continuously mechanically disturb the formations around the hole wall. This mechanical disturbance not only causes physical defects such as scratches, flaking, and broken edges on the core surface, but may also cause micro-cracks within the core to expand and penetrate, causing structural damage that is invisible to the naked eye, and in turn negatively impacting subsequent core analysis and research. Summary of the Invention

[0004] The purpose of the present invention is to provide a coring method for a drilling coring device to solve the technical problem that the mechanical disturbance caused by the general coring process during drilling is large, which easily causes physical defects and structural damage to the core, thereby having a negative impact on the analysis and research of the core.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a drilling and coring equipment, comprising a vertically arranged drill rod, the drill rod comprising an inner tube, an outer tube, a turbine and a drill bit, the outer tube being sleeved on the outside of the inner tube at intervals, the outer tube and the inner tube forming a accommodating hole that passes through in the up and down directions, the turbine being arranged in the accommodating hole, the turbine and the drill bit being sleeved on the outside of the inner tube, the turbine being rotatably connected to the outer side wall of the inner tube, the drill bit being fixed on the bottom surface of the turbine, the drill bit being flush with or protruding from the bottom surface of the inner tube and the bottom surface of the outer tube, and the top surface or outer side surface of the inner tube being provided with a first spray hole that penetrates to its inner side surface.

[0006] Optionally, a jet assembly is further included, which includes an inner boss and an outer boss, the inner boss is provided on the outer wall of the inner tube, the outer boss is provided on the inner wall of the outer tube, the top surface of the inner boss is provided with a second spray hole passing through in the up and down directions, and the top surface of the outer boss is provided with a third spray hole passing through in the up and down directions.

[0007] Optionally, the top surface of the inner boss is higher than the turbine, and the inner boss extends downward to the bottom surface of the inner tube; the top surface of the outer boss is higher than the turbine, and the outer boss extends downward to the bottom surface of the outer tube.

[0008] Optionally, the jet assembly further includes a flow guide member, the inner boss and the outer boss being arranged correspondingly, the flow guide member being arranged between the inner boss and the outer boss and being located above the turbine, and the top of the flow guide member being provided with an inner flow guide portion and an outer flow guide portion on both sides of the radial direction relative to the drill rod, respectively, the inner flow guide portion corresponding to the inner boss and the second spray hole, and the outer flow guide portion corresponding to the outer boss and the third spray hole.

[0009] Optionally, the jet assembly further includes two partitions, which are respectively arranged on both sides of the guide member in the circumferential direction relative to the drill rod, and the inner guide portion, the inner boss, the inner tube and the two partitions form an inner water trough, and the outer guide portion, the outer boss, the outer tube and the two partitions form an outer water trough.

[0010] Optionally, it also includes an extension tube and a plurality of the jet components, the plurality of the jet components are arranged at intervals along the circumference of the drill rod, the extension tube is vertically arranged above the drill rod, and the top surface of the extension tube is provided with a plurality of water holes passing through in the up and down directions around its axis, the water holes are connected to the accommodating hole, wherein any one of the jet components corresponds to at least one water hole, and the interval between two adjacent jet components corresponds to at least one water hole.

[0011] Optionally, the bottom surface of the drill bit is provided with a plurality of drill teeth evenly spaced around its axis, the bottom surface of the inner tube is provided with a plurality of inner protective covers corresponding one-to-one to the drill teeth, and the bottom surface of the outer tube is provided with a plurality of outer protective covers corresponding one-to-one to the drill teeth, and the bottom surface of the drill teeth is flush with or protrudes from the bottom surfaces of the inner protective covers and the bottom surfaces of the outer protective covers.

[0012] Optionally, the turbine includes an impeller and a plurality of blades, the impeller is sleeved on the outer side wall of the inner tube and rotatably connected to the inner tube, the plurality of blades are arranged on the outer side surface of the impeller around the axial direction of the impeller, and the drill bit is arranged on the bottom surface of the impeller;

[0013] The drill rod also includes a load-bearing boss and a thrust roller bearing. The load-bearing boss is arranged in the accommodating hole and connected to the inner side wall of the outer tube. The load-bearing boss is located between the blade and the drill bit. The thrust roller bearing is sleeved on the outer side of the inner tube and located on the bottom surface of the load-bearing boss. The top surface of the thrust roller bearing is connected to the load-bearing boss, and the bottom surface is connected to the top surface of the drill bit.

[0014] The present invention also relates to a coring method comprising the following steps:

[0015] S1. Install the drill pipe vertically above the ground;

[0016] S2. Move the drill rod downward and simultaneously pass water into the receiving hole of the drill rod to drive the drill bit in the receiving hole to rotate and spray water from the bottom of the drill rod;

[0017] S3, after the drill rod moves down to a certain depth, the drill rod stops moving;

[0018] S4, the drill rod rotates, and at the same time, water is sprayed inwardly from the drill rod to cut the rock core trapped by it;

[0019] S5. Spray water inwards through the drill pipe to push the core upwards.

[0020] Optionally, the aforementioned coring equipment is used for coring.

[0021] Compared with the prior art, the drilling and coring equipment and the drilling and coring method according to the embodiment of the present invention have the following beneficial effects:

[0022] In the drilling and coring equipment of the present invention, the outer tube is sleeved on the outside of the inner tube and forms a receiving hole for passing through in the up and down directions. The turbine and the drill bit are sleeved on the outside of the inner tube from top to bottom and are arranged in the receiving hole, wherein the turbine is used to drive the drill bit to rotate, and the first spray hole that passes through from the top surface or the outer side surface of the inner tube to the inner side surface thereof is used to spray high-pressure water flow to the rock core located on the inner side of the inner tube; further, when water flows downward from the top of the receiving hole, the downward water flow can drive the turbine to rotate, and the rotation of the turbine drives the drill bit to rotate, so that the drill bit breaks the rock and soil, wherein the water flow can also flow downward through the gap between the drill bit and the outer tube and the gap between the drill bit and the inner tube to wet the rock and soil, thereby reducing the difficulty of the drill bit in breaking the rock and soil and increasing the efficiency of the drill bit in breaking the rock and soil; further, the drill rod is While moving downward, the drill bit breaks the rock and soil so that the inner tube is sleeved on the outside of the rock core. When the drill rod moves downward to a certain depth, the drill rod stops moving and high-pressure water is introduced into one end of the first spray hole. At the same time, the drill rod rotates, and the high-pressure water rotates to cut the lower part of the rock core located in the inner tube, and water is introduced to the bottom of the rock core to cut off the rock core and push the rock core upward. In summary, when the drilling and coring equipment of the present invention breaks the rock and soil, only the turbine and the drill bit rotate, and other parts do not rotate. In addition, the rock core is cut and removed by high-pressure water flow. The mechanical disturbance generated by the entire drilling and coring process is small. Therefore, the physical defects and structural damage to the rock core are small, and a relatively complete rock core sample can be obtained, which can provide great help for subsequent analysis and research of the rock core. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the drilling and coring equipment of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the drill rod of the present invention.

[0025] Figure 3 for Figure 2 A partial enlarged view of part A in the middle.

[0026] Figure 4 It is a top view of the drill rod of the present invention.

[0027] Figure 5 for Figure 4 A partial enlarged view of part B in the middle.

[0028] Figure 6 This is a structural schematic diagram of a drill rod according to the present invention cut into one quarter.

[0029] Figure 7 for Figure 6 A partial enlarged view of part C in the middle.

[0030] Figure 8 This is a structural schematic diagram of the drill rod of the present invention cut into one quarter from another perspective.

[0031] Figure 9 for Figure 8 A partial enlarged view of part D in the middle.

[0032] Figure 10 It is a schematic structural diagram of the turbine and drill bit of the present invention.

[0033] Figure numerals: 1. drill rod; 11. inner tube; 111. first spray hole; 112. inner protective cover; 12. outer tube; 121. outer protective cover; 13. turbine; 131. impeller; 132. blade; 14. drill bit; 141. drill tooth; 15. accommodating hole; 16. load-bearing boss; 17. thrust roller bearing; 2. jet assembly; 21. inner boss; 211. second spray hole; 22. outer boss; 221. third spray hole; 23. guide member; 231. inner guide part; 232. outer guide part; 24. partition; 25. inner water tank; 26. outer water tank; 3. extension pipe; 31. water hole. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] like Figures 1 to 10As shown, a drilling and coring equipment of the present invention includes a vertically arranged drill rod 1, the drill rod 1 includes an inner tube 11, an outer tube 12, a turbine 13 and a drill bit 14, the outer tube 12 is sleeved on the outside of the inner tube 11 at intervals, the outer tube 12 and the inner tube 11 form a receiving hole 15 that passes through in the up and down directions, the turbine 13 is arranged in the receiving hole 15, the turbine 13 and the drill bit 14 are both sleeved on the outside of the inner tube 11, the turbine 13 is rotatably connected to the outer side wall of the inner tube 11, the drill bit 14 is fixed on the bottom surface of the turbine 13, the drill bit 14 is flush with or protrudes from the bottom surface of the inner tube 11 and the bottom surface of the outer tube 12, and the top surface or outer side surface of the inner tube 11 is provided with a first spray hole 111 that penetrates through its inner side surface.

[0038] In the above technical solution, the outer tube 12 is sleeved on the outside of the inner tube 11 and forms a receiving hole 15 for passing through in the up and down directions. The turbine 13 and the drill bit 14 are sleeved on the outside of the inner tube 11 from top to bottom and are arranged in the receiving hole 15, wherein the turbine 13 is used to drive the drill bit 14 to rotate, and the first spray hole 111 that passes through from the top surface or outer side surface of the inner tube 11 to its inner side surface is used to spray high-pressure water flow to the rock core located on the inner side of the inner tube 11; further, when water flows downward from the top of the receiving hole 15, the downward water flow can drive the turbine 13 to rotate, and the rotation of the turbine 13 drives the drill bit 14 to rotate, so that the drill bit 14 breaks the rock and soil, wherein the water flow can also flow downward through the gap between the drill bit 14 and the outer tube 12 and the gap between the drill bit 14 and the inner tube 11 to wet the rock and soil, thereby reducing the difficulty of the drill bit 14 breaking the rock and soil and increasing the crushing efficiency of the drill bit 14 The efficiency of rock and soil; further, the drill rod 1 moves downward while the drill bit 14 breaks the rock and soil so that the inner tube 11 is sleeved on the outside of the rock core. When the drill rod 1 moves downward to a certain depth, the drill rod 1 stops moving and high-pressure water is introduced into one end of the first spray hole 111. At the same time, the drill rod 1 rotates, and the high-pressure water rotates to cut the lower part of the rock core located in the inner tube 11, and water is introduced to the bottom of the rock core to cut off the rock core and push the rock core upward. In summary, when the drilling and coring equipment of the present invention breaks rock and soil, only the turbine 13 and the drill bit 14 rotate, and other components do not rotate. In addition, the rock core is cut and removed by high-pressure water flow. The mechanical disturbance generated by the entire drilling and coring process is small. Therefore, the physical defects and structural damage to the rock core are small, and a relatively complete rock core sample can be obtained, which can provide great help for subsequent analysis and research of the rock core.

[0039] Among them, since the gap between the inner tube 11 and the rock core inside it is small, after cutting off the lower part of the rock core, water is passed to the lower part of the rock core. A large amount of water is difficult to flow out quickly through the aforementioned gap, which will form an upward thrust on the rock core to push the rock core upward. When the rock core rises to a certain extent, the rock core can be pulled out with the help of other equipment.

[0040] Among them, a separate high-pressure pipeline can be set in the first spray hole 111, and water can be supplied through a separate boosting device (such as a water pump) to increase the pressure of the water sprayed inward from the first spray hole 111, so that it forms an effect similar to a high-pressure water gun or a high-pressure water jet, thereby achieving the effect of cutting the core.

[0041] Furthermore, it also includes a jet component 2, which includes an inner boss 21 and an outer boss 22. The inner boss 21 is provided on the outer wall of the inner tube 11, and the outer boss 22 is provided on the inner wall of the outer tube 12. The top surface of the inner boss 21 is provided with a second spray hole 211 that passes through in the up and down direction, and the top surface of the outer boss 22 is provided with a third spray hole 221 that passes through in the up and down direction.

[0042] Among them, the jet component 2 allows water to be discharged downward through the gap between the drill bit 14 and the outer tube 12 and the gap between the drill bit 14 and the inner tube 11, and can also be sprayed downward through the second spray hole 211 and the third spray hole 221. Furthermore, the water sprayed through the second spray hole 211 and the third spray hole 221 has a higher pressure and a faster flow rate. When the water pressure reaches a certain level and the water flow reaches a certain level, in addition to being used to wet the rock and soil, it can also crush the rock and soil to a certain extent before the drill bit 14 crushes it, so as to further reduce the difficulty of the drill bit 14 in crushing the rock and soil and increase the efficiency of the drill bit 14 in crushing the rock and soil.

[0043] In addition, the jet components 2 can be evenly distributed along the circumference of the drill rod 1 to evenly wet and crush the rock and soil.

[0044] Furthermore, the top surface of the inner boss 21 is higher than the turbine 13, and the top surface of the outer boss 22 is higher than the turbine 13. By reducing the distance between the second nozzle 211 and the third nozzle 221 and the water inlet, the pressure and flow rate of the water entering the second nozzle 211 and the third nozzle 221 are increased, and the negative impact of the turbine 13 on the water entering the second nozzle 211 and the third nozzle 221 can also be reduced.

[0045] Furthermore, the inner boss 21 extends downward to the bottom surface of the inner tube 11, and the outer boss 22 extends downward to the bottom surface of the outer tube 12, so as to reduce the distance between the second spray hole 211 and the third spray hole 221 and the rock and soil, thereby increasing the effect of the second spray hole 211 and the third spray hole 221 in spraying water to break the rock and soil, and can also reduce the negative impact of the drill bit 14 on the sprayed water.

[0046] In some embodiments, the jet assembly 2 further includes a guide member 23, the inner boss 21 and the outer boss 22 being correspondingly arranged, the guide member 23 being arranged between the inner boss 21 and the outer boss 22 and being located above the turbine 13, and the top of the guide member 23 is provided with an inner guide portion 231 and an outer guide portion 232 on both sides of the radial direction of the drill pipe 1, the inner guide portion 231 corresponding to the inner boss 21 and the second spray hole 211, and the outer guide portion 232 corresponding to the outer boss 22 and the third spray hole 22 1; wherein, the guide member 23 guides the water from top to bottom to the second spray hole 211 and the third spray hole 221 through the inner guide portion 231 and the outer guide portion 232, so as to further increase the flow rate and pressure of the water entering the second spray hole 211 and the third spray hole 221; in addition, the inner guide portion 231 and the outer guide portion 232 can be inclined surfaces or curved surfaces, and the distance between the two gradually decreases from bottom to top and is connected at the top. Further, the inner guide portion 231 can be connected to the top surface of the inner boss 21, and the outer guide portion 232 can be connected to the top surface of the outer boss 22.

[0047] Furthermore, the jet assembly 2 also includes two partitions 24, which are respectively arranged on both sides of the guide member 23 relative to the circumference of the drill pipe 1. The inner guide portion 231, the inner boss 21, the inner tube 11 and the two partitions 24 form an inner water trough 25, and the outer guide portion 232, the outer boss 22, the outer tube 12 and the two partitions 24 form an outer water trough 26.

[0048] Among them, the inner water trough 25 and the outer water trough 26 surround the second spray hole 211 and the third spray hole 221 to prevent the water leading to the flow guide 23, the inner boss 21 and the outer boss 22 from splashing in the horizontal direction, so that more water is concentrated into the second spray hole 211 and the third spray hole 221 to further increase the flow rate and pressure of the water entering the second spray hole 211 and the third spray hole 221.

[0049] In other embodiments, a separate high-pressure pipe can be set in the second spray hole 211 and the third spray hole 221, and water can be supplied through a separate boosting device (such as a water pump) to increase the flow rate and pressure of the water sprayed downward from the second spray hole 211 and the third spray hole 221, so that it forms an effect similar to a high-pressure water gun or a high-pressure water jet, thereby improving the effect of crushing rock and soil.

[0050] Furthermore, it also includes an extension tube 3 and multiple jet components 2, multiple jet components 2 are arranged at intervals along the circumference of the drill rod 1, the extension tube 3 is vertically arranged above the drill rod 1, and the top surface of the extension tube 3 is provided with multiple water holes 31 passing through in the up and down directions around its axis, and the water holes 31 are connected to the accommodating hole 15, wherein any jet component 2 corresponds to at least one water hole 31, and the interval between two adjacent jet components 2 corresponds to at least one water hole 31.

[0051] Among them, the extension tube 3 is used to increase the depth to which the drill rod 1 can move downward. Preferably, the inner diameter of the extension tube 3 is equal to the inner diameter of the inner tube 11, and the outer diameter of the extension tube 3 is equal to the outer diameter of the outer tube 12. In addition, the water hole 31 can also be set corresponding to the first spray hole 111, the second spray hole 211 and the third spray hole 221 to increase the smoothness of water passing into the spray hole.

[0052] Furthermore, the extension pipe 3 includes a plurality of unit pipes arranged in sequence along the vertical direction, and adjacent unit pipes are detachably connected. The water holes 31 pass through the unit pipes in the up and down directions to adjust the length of the extension pipe 3 according to the required drilling depth.

[0053] Furthermore, the bottom surface of the drill bit 14 is evenly spaced around its axis and provided with a plurality of drill teeth 141, the bottom surface of the inner tube 11 is provided with a plurality of inner protective covers 112 corresponding one-to-one to the drill teeth 141, and the bottom surface of the outer tube 12 is provided with a plurality of outer protective covers 121 corresponding one-to-one to the drill teeth 141, and the bottom surfaces of the drill teeth 141 are flush with or protrude from the bottom surfaces of the inner protective covers 112 and the bottom surfaces of the outer protective covers 121; wherein, the interval arrangement of the drill teeth 141 can effectively improve the effect of crushing rock and soil, and further, the rotation of the drill bit 14 can cause the drill teeth 141 to be stored between the inner protective covers 112 and the outer protective covers 121, so as to protect the drill teeth 141 when idle.

[0054] Furthermore, the turbine 13 includes an impeller 131 and a plurality of blades 132, the impeller 131 is sleeved on the outer wall of the inner tube 11 and is rotatably connected to the inner tube 11, the plurality of blades 132 are arranged on the outer side surface of the impeller 131 around the axial direction of the impeller 131, and the drill bit 14 is arranged on the bottom surface of the impeller 131; the drill rod 1 also includes a load-bearing boss 16 and a thrust roller bearing 17, the load-bearing boss 16 is arranged in the accommodating hole 15 and connected to the inner wall of the outer tube 12, the load-bearing boss 16 is located between the blades 132 and the drill bit 14, the thrust roller bearing 17 is sleeved on the outer side of the inner tube 11 and is located on the bottom surface of the load-bearing boss 16, the top surface of the thrust roller bearing 17 is connected to the load-bearing boss 16, and the bottom surface is connected to the top surface of the drill bit 14.

[0055] Among them, the bottom surface of the thrust roller bearing 17 abuts against the top surface of the drill bit 14 to keep the drill bit 14 stable during rotation, and the thrust roller bearing 17 rotates with the drill bit 14 to reduce the friction between the two, thereby reducing the resistance experienced by the drill bit 14; in addition, the blades 132 are obliquely arranged on the outer side surface of the impeller 131 to convert the downward water flow force into a force rotating along the impeller 131; in addition, multiple blades 132 are evenly distributed and spaced on the outer side surface of the impeller 131 to ensure uniform force transmission.

[0056] Furthermore, in order to facilitate installation, the drill bit 14 and the turbine 13 are detachably connected.

[0057] The present embodiment also relates to a method for coring a hole, comprising the following steps: S1, vertically installing a drill rod 1 above the ground; S2, moving the drill rod 1 downward, while simultaneously passing water into the receiving hole 15 of the drill rod 1 to drive the drill bit 14 in the receiving hole 15 to rotate and spray water from the bottom of the drill rod 1; S3, after the drill rod 1 moves downward to a certain depth, the drill rod 1 stops moving; S4, rotating the drill rod 1, while simultaneously spraying water inward from the drill rod 1 to cut the rock core trapped therein; S5, spraying water inward from the drill rod 1 to push the rock core upward by the sprayed water.

[0058] In the above technical solution, step S1 is the step of installing the drill rod 1, step S2 is the step of drilling, step S3 is the step of stopping drilling, step S4 is the step of cutting the core, and step S5 is the step of removing the core.

[0059] Among them, in step S4, the pressure of water sprayed inwardly by the drill rod 1 is relatively high to achieve an effect similar to that of a high-pressure water gun or a high-pressure water jet. In step S5, since this step does not require core cutting, the pressure of water sprayed inwardly by the drill rod 1 can be lower than the pressure of water sprayed in step S4. In this step, the drill rod 1 does not need to rotate.

[0060] Furthermore, the aforementioned coring equipment is used to perform coring.

[0061] Furthermore, fixed setting and fixed connection refer to that the relative position relationship of two components is fixed, including but not limited to fixing by connecting parts, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap connection.

[0062] Furthermore, detachable connection and detachable setting refer to that two parts can be disassembled and assembled repeatedly and multiple times without damage or serious deformation, including but not limited to fixation through connecting parts and fixation through snap connections.

[0063] Furthermore, the rotational connection and the rotational setting refer to the two connected parts being able to rotate, including but not limited to connection through bearings and connection through clearance fit.

[0064] Furthermore, the connecting parts include but are not limited to fasteners, straps, ties, pneumatic connecting elements, hydraulic connecting elements, flange plates, Velcro, and buttons.

[0065] In summary, the embodiments of the present invention provide a coring device and a coring method, the technical effects of which are:

[0066] In the drilling and coring equipment of the present invention, the outer tube 12 is sleeved on the outer side of the inner tube 11 and forms a receiving hole 15 for passing through in the up and down directions. The turbine 13 and the drill bit 14 are sleeved on the outer side of the inner tube 11 from top to bottom and are arranged in the receiving hole 15, wherein the turbine 13 is used to drive the drill bit 14 to rotate, and the first spray hole 111 that penetrates from the top surface or outer side surface of the inner tube 11 to its inner side surface is used to spray high-pressure water flow to the rock core located on the inner side of the inner tube 11; further, when water flows downward from the top of the receiving hole 15, the downward water flow can drive the turbine 13 to rotate, and the rotation of the turbine 13 drives the drill bit 14 to rotate, so that the drill bit 14 breaks the rock and soil, wherein the water flow can also flow downward through the gap between the drill bit 14 and the outer tube 12 and the gap between the drill bit 14 and the inner tube 11 to wet the rock and soil, thereby reducing the difficulty of the drill bit 14 breaking the rock and soil and increasing the drilling speed of the drill bit 14. Efficiency in crushing rock and soil; further, while the drill rod 1 moves downward, the drill bit 14 crushes the rock and soil so that the inner tube 11 is sleeved on the outside of the rock core. When the drill rod 1 moves downward to a certain depth, the drill rod 1 stops moving and high-pressure water is introduced into one end of the first spray hole 111. At the same time, the drill rod 1 rotates, and the high-pressure water rotates to cut the lower part of the rock core located in the inner tube 11, and water is introduced to the bottom of the rock core to cut off the rock core and push the rock core upward. In summary, when the drilling and coring equipment of the present invention crushes rock and soil, only the turbine 13 and the drill bit 14 rotate, and other components do not rotate. In addition, the rock core is cut and removed by high-pressure water flow, and the mechanical disturbance generated by the entire drilling and coring is small. Therefore, the physical defects and structural damage to the rock core are small, and a relatively complete rock core sample can be obtained, which can provide great help for subsequent analysis and research of the rock core.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A coring equipment, characterized in that: The invention comprises a vertically arranged drill rod (1), wherein the drill rod (1) comprises an inner tube (11), an outer tube (12), a turbine (13) and a drill bit (14); the outer tube (12) is sleeved on the outer side of the inner tube (11) at intervals; the outer tube (12) and the inner tube (11) form a receiving hole (15) which passes through in the vertical direction; the turbine (13) is arranged in the receiving hole (15); the turbine (13) and the drill bit (14) are both sleeved on the outer side of the inner tube (11); the turbine (13) is rotatably connected to the outer side wall of the inner tube (11); the drill bit (14) is fixed on the bottom surface of the turbine (13); the drill bit (14) is flush with or protrudes from the bottom surface of the inner tube (11) and the bottom surface of the outer tube (12); the top surface or the outer side surface of the inner tube (11) is provided with a first spray hole (111) which passes through the inner side surface thereof.

2. The coring equipment according to claim 1, characterized in that: The invention also includes a jet assembly (2), wherein the jet assembly (2) includes an inner boss (21) and an outer boss (22), wherein the inner boss (21) is provided on the outer wall of the inner tube (11), and the outer boss (22) is provided on the inner wall of the outer tube (12), and the top surface of the inner boss (21) is provided with a second spray hole (211) extending in the vertical direction, and the top surface of the outer boss (22) is provided with a third spray hole (221) extending in the vertical direction.

3. The coring equipment according to claim 2, characterized in that: The top surface of the inner boss (21) is higher than the turbine (13), and the inner boss (21) extends downward to the bottom surface of the inner tube (11); the top surface of the outer boss (22) is higher than the turbine (13), and the outer boss (22) extends downward to the bottom surface of the outer tube (12).

4. The coring equipment according to claim 2, characterized in that: The jet assembly (2) further comprises a flow guide (23), wherein the inner boss (21) and the outer boss (22) are arranged correspondingly, the flow guide (23) is arranged between the inner boss (21) and the outer boss (22), and is located above the turbine (13), and the top of the flow guide (23) is provided with an inner flow guide portion (231) and an outer flow guide portion (232) on both sides of the radial direction relative to the drill rod (1), respectively, the inner flow guide portion (231) corresponds to the inner boss (21) and the second spray hole (211), and the outer flow guide portion (232) corresponds to the outer boss (22) and the third spray hole (221).

5. The coring equipment according to claim 4, characterized in that: The jet assembly (2) further comprises two baffles (24), the two baffles (24) being respectively arranged on both sides of the flow guide (23) in the circumferential direction relative to the drill rod (1); the inner flow guide portion (231), the inner boss (21), the inner tube (11) and the two baffles (24) forming an inner water trough (25); and the outer flow guide portion (232), the outer boss (22), the outer tube (12) and the two baffles (24) forming an outer water trough (26).

6. The coring equipment according to claim 3, characterized in that: The invention also includes an extension tube (3) and a plurality of the jet assemblies (2), wherein the plurality of the jet assemblies (2) are arranged at intervals along the circumference of the drill rod (1), the extension tube (3) is vertically arranged above the drill rod (1), and the top surface of the extension tube (3) is provided with a plurality of water holes (31) passing through in the up-down direction around its axis, wherein the water holes (31) are connected to the accommodating hole (15), wherein any one of the jet assemblies (2) corresponds to at least one of the water holes (31), and the interval between two adjacent jet assemblies (2) corresponds to at least one of the water holes (31).

7. The coring equipment according to claim 1, characterized in that: The bottom surface of the drill bit (14) is provided with a plurality of drill teeth (141) spaced evenly around its axis, the bottom surface of the inner tube (11) is provided with a plurality of inner protective covers (112) corresponding one-to-one to the drill teeth (141), and the bottom surface of the outer tube (12) is provided with a plurality of outer protective covers (121) corresponding one-to-one to the drill teeth (141), and the bottom surface of the drill teeth (141) is flush with or protrudes from the bottom surface of the inner protective cover (112) and the bottom surface of the outer protective cover (121).

8. The coring equipment according to claim 1, characterized in that: The turbine (13) includes an impeller (131) and a plurality of blades (132); the impeller (131) is sleeved on the outer wall of the inner tube (11) and rotatably connected to the inner tube (11); the plurality of blades (132) are arranged on the outer side surface of the impeller (131) around the axial direction of the impeller (131); and the drill bit (14) is arranged on the bottom surface of the impeller (131); The drill rod (1) further includes a load-bearing boss (16) and a thrust roller bearing (17). The load-bearing boss (16) is arranged in the accommodating hole (15) and connected to the inner side wall of the outer tube (12). The load-bearing boss (16) is located between the blade (132) and the drill bit (14). The thrust roller bearing (17) is sleeved on the outer side of the inner tube (11) and is located on the bottom surface of the load-bearing boss (16). The top surface of the thrust roller bearing (17) is connected to the load-bearing boss (16), and the bottom surface is connected to the top surface of the drill bit (14).

9. A method for coring a hole, characterized in that: The following steps are involved: S1. Install the drill rod (1) vertically above the ground; S2, moving the drill rod (1) downward, and at the same time, passing water into the receiving hole (15) of the drill rod (1) to drive the drill bit (14) in the receiving hole (15) to rotate and spray water from the bottom of the drill rod (1); S3, after the drill rod (1) moves downward to a certain depth, the drill rod (1) stops moving; S4, the drill rod (1) rotates, thereby simultaneously spraying water inwardly from the drill rod (1) to cut the rock core trapped therein; S5. The drill pipe (1) sprays water inwards to push the core upwards through the sprayed water.

10. The coring method according to claim 9, characterized in that: The coring device according to any one of claims 1 to 8 is used for coring.

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