Special coring equipment for hard broken stratum in geothermal drilling

Abstract

The invention relates to the technical field of geological sample preparation, in particular to special coring equipment for a hard broken stratum in geothermal drilling, which comprises a counterweight support and further comprises a rotary sample drilling structure connected with the counterweight support, the rotary sample drilling structure comprises a rotary lifting driving part, a limiting rotary driving part is mounted on the rotary lifting driving part, and the limiting rotary driving part is connected with the counterweight support. The limiting rotation driving part is connected with a pile casing, the outer wall of the pile casing is fixedly connected with four sets of buckling frames, the lower end of the pile casing is fixedly provided with a core drill bit, and four sets of pneumatic glue filling parts are installed in the pile casing; and the power-assisted separation part is connected with the rotary lifting driving part. Through cooperation of the rotary sample drilling structure and the power-assisted separation part, while the rock core sample is drilled, the rock core sample in a broken and loose state is fixed in a manner of filling transparent epoxy resin glue, so that complete collapse and mixing of the interior of the rock core sample in the taking-out and transporting process are avoided; subsequent observation and analysis of the rock core sample are facilitated, and the difficulty of subsequent analysis of the rock core sample is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of geological sample preparation, in particular to a special coring device for hard and broken strata in geothermal drilling. Background Art

[0002] Geothermal drilling is a drilling and well-drilling technology used to explore and develop geothermal energy resources within the Earth's crust. When surveying hard, fractured formations, sampling is necessary. Core samples drilled from hard, fractured formations are often loose and easily broken.

[0003] General coring equipment is only suitable for drilling and removing cores with strong integrity. However, since the cores drilled out from hard and broken formations are often loose and easy to break, once the core samples are directly removed after being drilled out, the internal structure of the core samples will collapse. The collapse of the core structure will lead to the destruction of original information, making it impossible for personnel to distinguish the rock and soil conditions at different depths, which is not conducive to subsequent analysis of hard and broken formations. At the same time, such samples are not easy to remove, transport and store. Summary of the Invention

[0004] The purpose of the present invention is to provide a special coring device for hard and broken formations in geothermal drilling, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A coring device specifically designed for hard and broken formations in geothermal drilling, comprising a counterweight support, a counterweight block fixedly connected to the counterweight support, a console fixedly connected to the counterweight support, and further comprising:

[0007] The rotary drilling sample structure connected to the counterweight support, the rotary drilling sample structure includes a rotary lifting drive unit connected to the counterweight support, a limited rotary driving unit is installed on the rotary lifting drive unit, and the rotary lifting drive unit is used to adjust the height and inclination angle of the limited rotary driving unit, the limited rotary driving unit is connected to the casing, the outer wall of the casing is fixedly connected to four sets of buckle frames movably connected to the limited rotary driving unit, the lower end of the casing is fixedly installed with a core drill bit, four sets of pneumatic filling parts distributed along the circumference are installed in the casing, the pneumatic filling parts are used to enclose the core sample and store transparent epoxy resin glue, two adjacent sets of pneumatic filling parts abut each other, the pneumatic filling parts are movably connected to a variable height air supply power supply unit, when the variable height air supply power supply unit performs a pressurizing operation on the pneumatic filling part, the pneumatic filling part performs a glue injection and clamping operation on the core sample, the variable height air supply power supply unit is connected to the rotary lifting drive unit, the variable height air supply power supply unit is connected to two sets of first electromagnets, and the first electromagnet is magnetically coupled with the limited rotary driving unit;

[0008] The power-assisted separation part is connected to the rotating and lifting drive part, and the power-assisted separation part includes a first motor fixedly connected to the rotating and lifting drive part, the output shaft of the first motor is fixedly connected to the rotating frame, the rotating frame is fixedly connected to the second motor, and the output shaft of the second motor is fixedly connected to the saw cylinder through the connecting frame, and the end of the saw cylinder is provided with an annularly arranged saw teeth, and the saw cylinder is used to separate the core sample that is bonded to the pneumatic filling part.

[0009] As a further improvement of the present invention: the rotation and lifting drive unit includes a guide frame hinged to the counterweight support, the guide frame is hinged with a first active telescopic rod, the first active telescopic rod is hinged to the counterweight support, the guide frame is fixedly connected to a third motor, the output shaft of the third motor is fixedly connected to a screw rod, the screw rod is threadedly connected to a lifting frame slidably connected to the guide frame, the lifting frame is connected to the limited rotation drive unit, and the lifting frame is connected to the variable height air supply power supply unit.

[0010] As a further improvement scheme of the present invention: the limited rotation driving part includes a rotation limiting frame fixedly connected to the lifting frame, the rotation limiting frame is rotatably connected to a rotating frame, the rotating frame is fixedly connected to a gear ring, the lifting frame is fixedly connected to a fourth motor, the output shaft of the fourth motor is fixedly connected to a gear meshing with the gear ring, the rotating frame is fixedly installed with four groups of guide sleeves distributed at equal angles in the circumferential direction, the guide sleeves are slidably connected with a pin rack, the pin rack is movably connected to the buckle rack, the pin rack and the outer wall of the casing abut against each other, the four groups of pin racks are commonly pinned to a group of pressing frames, the pressing frame is movably connected to the casing, the pressing frame and the four groups of pneumatic filling parts abut against each other, the rotating frame is fixedly connected to multiple groups of driven elastic telescopic rods, the moving ends of the multiple groups of driven elastic telescopic rods are commonly fixedly connected to a group of synchronous frames, two groups of first permanent magnets magnetically coupled to the first electromagnet are fixedly installed on the synchronous frame, the synchronous frame is fixedly connected to four groups of chute racks, and the chute rack is slidably connected to a driven frame fixedly connected to the pin rack.

[0011] As a further improvement of the present invention: the pneumatic filling portion includes a hollow shell inserted in the casing, the hollow shell is fixedly connected with two sets of symmetrically arranged abutment strips, the adjacent two sets of abutment strips respectively installed on the two adjacent sets of hollow shells abut each other, the abutment strips and the pressure frame abut each other, a separation layer is fixedly installed on one side of the hollow shell facing the rotation axis of the casing, the separation layer and the hollow shell are provided with multiple sets of through holes, the through holes of the separation layer are interconnected with the through holes at the same height on the hollow shell, the two sets of interconnected through holes are commonly connected with a set of hot melt adhesive layers, The hot melt adhesive layer is fixedly connected to an electric heating ring installed in a hollow shell, and two groups of symmetrically arranged extrusion strips are slidingly installed in the hollow shell. A glue cavity is provided between the two groups of extrusion strips in the same hollow shell, and a glue injection plug is threadedly connected to the hollow shell. An air cavity is provided between a group of extrusion strips and the hollow shell, and the hollow shell is fixedly connected to a first pair of joints, and the first pair of joints is fixedly connected to a first conductive ring, and the first conductive ring is electrically connected to the electric heating ring, and the first pair of joints is movably connected to the variable high gas supply power supply part, and the variable high gas supply power supply part is movably connected to the first conductive ring.

[0012] As a further improvement scheme of the present invention: the variable height air supply and power supply part includes two groups of active telescopic frames fixedly connected to the lifting frame, the movable end of the active telescopic frame is fixedly connected to the fixed frame, the fixed frame is fixedly connected to a hollow ring, the hollow ring is fixedly connected to multiple groups of fixed pipes, the fixed pipes are fixedly connected to a second pair of joints, the second pair of joints are fixedly connected to a second conductive ring, the first pair of joints and the second pair of joints are movably connected, the first conductive ring and the second conductive ring are movably connected, the hollow ring is fixedly connected to a hose, the hose is fixedly connected to an air pressure detection probe, the hose is fixedly connected to a reversing valve, the reversing valve is fixedly connected to the lifting frame, the reversing valve is fixedly connected to a pressure pump, the reversing valve is fixedly connected to a negative pressure pump, and the pressure pump and the negative pressure pump are both fixedly connected to the lifting frame.

[0013] As a further improvement of the present invention: a convex edge is provided in the hollow shell.

[0014] As a further improvement of the present invention: the abutment strip is provided with an inclined surface, and the hollow shell is provided with a triangular protruding surface that matches the shape of the inclined surface of the abutment strip.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The transparent epoxy resin glue is filled into the four groups of pneumatic filling parts, and then the limited rotation drive part drives the casing to rotate through the buckle frame, so that the casing drives the core drill bit to rotate, and as the rotating lifting drive part drives the limited rotation drive part to move downward, the core drill bit drills into the rock and soil. During this period, the drilled core enters the annular space jointly enclosed by the four groups of pneumatic filling parts. After the core drill bit moves to a preset depth, the limited rotation drive part stops driving the casing, so that the casing and the core drill bit stop rotating, and then the high air supply power supply part supplies high-pressure gas and electricity to the pneumatic filling part, so that the transparent epoxy resin glue in the pneumatic filling part is squeezed into the drilled core sample, so that the transparent epoxy resin glue flows into the gap of the core sample, and the core sample is bonded to the pneumatic filling part, and then the rotating lifting drive part limits the rotation The driving part is lifted, so that the casing and the core drill bit are raised and separated from the borehole. Under the drive of the casing on the pneumatic filling part, the core sample injected with transparent epoxy resin glue moves out of the borehole, and then the rotating lifting drive part drives the limit rotation drive part to rotate, so that the casing is in a horizontal state, and the rotating lifting drive part drives the limit rotation drive part to move to provide space for the saw cylinder. As the first motor drives the rotating frame to rotate, the rotating frame drives the second motor to move, and the second motor drives the saw cylinder to move toward the casing through the connecting frame, so that the saw cylinder faces the core sample, and then the rotating lifting drive part drives the limit rotation drive part to continue to move toward the saw cylinder. At the same time, the second motor drives the saw cylinder to rotate through the connecting frame, so that the saw cylinder cuts off the core sample combined with the transparent epoxy resin glue from the pneumatic filling part, so that the core sample can be taken out separately later. The present invention cooperates with the rotating drilling sample structure and the auxiliary separation part to fix the core sample in a broken and loose state by adding transparent epoxy resin glue while drilling the core sample, so as to facilitate the subsequent removal and transportation of the core sample and avoid the complete collapse and mixing of the core sample during the removal and transportation process, which is beneficial to the subsequent observation and analysis of the core sample and reduces the difficulty of the subsequent analysis of the core sample. At the same time, due to the sealing of the transparent epoxy resin glue, the core sample is convenient for long-term preservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the partial rotation lifting drive part and the power-assisted separation part cooperating with each other in the present invention;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of the partially rotating lifting drive unit and the power-assisted separation unit of the present invention from another perspective;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the casing, buckle frame, core drill bit and pneumatic filling part cooperating with each other in the present invention;

[0022] Figure 6 Schematic diagram of the internal three-dimensional structure of the pneumatic filling part of the present invention;

[0023] Figure 7 A schematic diagram of the internal three-dimensional structure of the pneumatic filling portion of the present invention from another perspective;

[0024] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram of point A in the middle;

[0025] Figure 9 A top view of the pneumatic filling portion of the present invention;

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the position-limiting rotation driving part of the present invention;

[0027] Figure 11 is a schematic diagram of the three-dimensional structure of the position-limiting rotation driving portion of the present invention from another perspective;

[0028] Figure 12 It is a schematic diagram of the three-dimensional structure of the pin bracket and the driven bracket cooperating with each other in the present invention;

[0029] Figure 13 It is a schematic diagram of the three-dimensional structure of the press frame of the present invention;

[0030] Figure 14 It is a schematic diagram of the three-dimensional structure of the variable height gas supply and power supply unit of the present invention;

[0031] Figure 15 For the present invention Figure 14 A partial enlarged schematic diagram of point B in the middle;

[0032] Figure 16 This is a schematic diagram of the three-dimensional structure of the variable height gas supply and power supply unit of the present invention from another perspective.

[0033] In the figure: 1. counterweight support; 2. counterweight block; 3. control console; 4. rotating drill sample structure; 5. rotating lifting drive unit; 6. limited rotating drive unit; 7. casing; 8. buckle frame; 9. core drill bit; 10. pneumatic filling unit; 11. variable height air supply power supply unit; 12. first electromagnet; 13. power-assisted separation unit; 14. first motor; 15. rotating frame; 16. second motor; 17. connecting frame; 18. saw cylinder; 19. saw teeth; 20. guide frame; 21. first active telescopic rod; 22. third motor; 23. screw; 24. lifting frame; 25. rotating limit frame; 26. slewing frame; 27. gear ring; 28. fourth motor; 29. ​​gear; 30. guide sleeve; 31. pin rack ; 32. Press frame; 33. Driven elastic telescopic rod; 34. Synchronous frame; 35. First permanent magnet; 36. Bevel frame; 37. Driven frame; 38. Hollow shell; 39. Abutment strip; 40. Separation layer; 41. Through hole; 42. Hot melt adhesive layer; 43. Electric heating ring; 44. Extrusion strip; 45. Glue cavity; 46. Air cavity; 47. First pair of joints; 48. First conductive ring; 49. Active telescopic frame; 50. Fixed frame; 51. Hollow ring; 52. Fixed tube; 53. Second pair of joints; 54. Second conductive ring; 55. Hose; 56. Air pressure detection probe; 57. Reversing valve; 58. Pressure pump; 59. Negative pressure pump; 60. Convex edge; 61. Triangular protruding surface; 62. Glue injection plug. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0035] Example 1, see Figures 1 to 16 As shown, a special coring device for hard and broken formations in geothermal drilling includes a counterweight support 1, to which a counterweight block 2 is fixedly connected, and to which a console 3 is fixedly connected. The console 3 is used for information processing and information exchange, and further includes:

[0036] A rotating drilling structure 4 connected to the counterweight support 1 includes a rotating lifting drive unit 5 connected to the counterweight support 1. A limited rotating drive unit 6 is installed on the rotating lifting drive unit 5. The rotating lifting drive unit 5 is used to adjust the height and inclination angle of the limited rotating drive unit 6. The limited rotating drive unit 6 is connected to a casing 7. The outer wall of the casing 7 is fixedly connected to four groups of buckles 8 that are movably connected to the limited rotating drive unit 6. A core drill bit 9 is fixedly installed at the lower end of the casing 7. Four groups of pneumatic filling parts distributed along the circumferential direction are installed in the casing 7. 10. The pneumatic glue filling unit 10 is used to enclose the core sample and store transparent epoxy resin glue. Two adjacent groups of pneumatic glue filling units 10 abut against each other. The pneumatic glue filling unit 10 is movably connected to a variable-height air supply and power supply unit 11. When the variable-height air supply and power supply unit 11 pressurizes the pneumatic glue filling unit 10, the pneumatic glue filling unit 10 performs glue injection and clamping operations on the core sample. The variable-height air supply and power supply unit 11 is connected to the rotation and lifting drive unit 5. The variable-height air supply and power supply unit 11 is connected to two groups of first electromagnets 12. The first electromagnets 12 are magnetically coupled to the limited rotation drive unit 6.

[0037] The power-assisted separation part 13 is connected to the rotating and lifting drive part 5, and the power-assisted separation part 13 includes a first motor 14 fixedly connected to the rotating and lifting drive part 5, the output shaft of the first motor 14 is fixedly connected to the rotating frame 15, the rotating frame 15 is fixedly connected to the second motor 16, and the output shaft of the second motor 16 is fixedly connected to the saw cylinder 18 through the connecting frame 17. The end of the saw cylinder 18 is provided with saw teeth 19 arranged in a ring. The saw cylinder 18 is used to separate the core samples that are bonded to each other with the pneumatic filling part 10.

[0038] The transparent epoxy resin glue is filled into the four groups of pneumatic filling parts 10, and then the limited rotation driving part 6 drives the casing 7 to rotate through the buckle frame 8, so that the casing 7 drives the core drill bit 9 to rotate. As the rotating lifting driving part 5 drives the limited rotation driving part 6 to move downward, the core drill bit 9 drills into the rock and soil. During this period, the drilled core enters the annular space jointly enclosed by the four groups of pneumatic filling parts 10. After the core drill bit 9 moves to a preset depth, the limited rotation driving part 6 stops driving the casing 7, so that the casing 7 and the core drill bit 9 stop rotating, and then the high gas supply and power supply part 11 supplies high-pressure gas and electricity to the pneumatic filling part 10, so that the transparent epoxy resin glue in the pneumatic filling part 10 is squeezed into the drilled core sample, so that the transparent epoxy resin glue flows into the gap of the core sample and makes the core sample bonded to the pneumatic filling part 10, and then the rotating lifting driving part 5 lifts the limited rotation driving part 6. The casing 7 and the core drill bit 9 are raised and separated from the borehole. Under the drive of the casing 7 on the pneumatic filling part 10, the core sample injected with transparent epoxy resin glue moves out of the borehole, and then the rotating lifting drive part 5 drives the limit rotation drive part 6 to rotate, so that the casing 7 is in a horizontal state, and the rotating lifting drive part 5 drives the limit rotation drive part 6 to move to provide space for the saw cylinder 18. As the first motor 14 drives the rotating frame 15 to rotate, the rotating frame 15 drives the second motor 16 to move, and the second motor 16 drives the saw cylinder 18 to move toward the casing 7 through the connecting frame 17, so that the saw cylinder 18 is facing the core sample, and then the rotating lifting drive part 5 drives the limit rotation drive part 6 to continue to move toward the saw cylinder 18. At the same time, the second motor 16 drives the saw cylinder 18 to rotate through the connecting frame 17, so that the saw cylinder 18 cuts the core sample combined with the transparent epoxy resin glue from the pneumatic filling part 10, so that the core sample can be taken out separately later. The present invention cooperates with the rotating drilling structure 4 and the auxiliary separation part 13 to fix the core sample in a broken and loose state by adding transparent epoxy resin glue while drilling the core sample, so as to facilitate the subsequent removal and transportation of the core sample and avoid the complete collapse and mixing of the core sample during the removal and transportation process, which is beneficial to the subsequent observation and analysis of the core sample and reduces the difficulty of the subsequent analysis of the core sample. At the same time, due to the sealing of the transparent epoxy resin glue, the core sample is convenient for long-term preservation.

[0039] In one aspect of this embodiment, the rotation and lifting drive unit 5 includes a guide frame 20 hingedly connected to the counterweight support 1. The guide frame 20 is hingedly connected to a first active telescopic rod 21, which is hinged to the counterweight support 1. The guide frame 20 is fixedly connected to a third motor 22. The output shaft of the third motor 22 is fixedly connected to a screw rod 23. The screw rod 23 is threadedly connected to a lifting frame 24 that is slidably connected to the guide frame 20. The lifting frame 24 is connected to the limited rotation drive unit 6, and the lifting frame 24 is connected to the variable height air supply power supply unit 11. The first active telescopic rod 21 is used to drive the guide frame 20 to rotate. The rotating guide frame 20 drives the lifting frame 24 to rotate, so that the lifting frame 24 drives the limited rotation drive unit 6 to rotate.

[0040] In one case of this embodiment, the limited rotation driving part 6 includes a rotation limit frame 25 fixedly connected to the lifting frame 24, the rotation limit frame 25 is rotatably connected to the rotary frame 26, the rotary frame 26 is fixedly connected to the ring gear 27, the lifting frame 24 is fixedly connected to the fourth motor 28, the output shaft of the fourth motor 28 is fixedly connected to the gear 29 meshing with the ring gear 27, four groups of guide sleeves 30 distributed at equal angles along the circumferential direction are fixedly installed on the rotary frame 26, the guide sleeves 30 are slidably connected to the pin holder 31, the pin holder 31 is movably connected to the buckle frame 8, the pin holder 31 abuts against the outer wall of the casing 7, the four groups of pin holders 31 are pinned together with a group of pressing frames 32, the pressing The frame 32 is movably connected to the casing 7, and the pressure frame 32 is in abutment with the four groups of pneumatic filling parts 10. The rotating frame 26 is fixedly connected to multiple groups of driven elastic telescopic rods 33, and the moving ends of the multiple groups of driven elastic telescopic rods 33 are commonly fixedly connected to a group of synchronous frames 34. Two groups of first permanent magnets 35 magnetically coupled with the first electromagnet 12 are fixedly mounted on the synchronous frame 34. The synchronous frame 34 is fixedly connected to four groups of inclined slot frames 36, and the inclined slot frames 36 are slidably connected to the driven frame 37 fixedly connected to the pin frame 31. Under normal circumstances, the driven elastic telescopic rod 33 is in a retracted state, so that under the limit of the inclined slot frame 36, the driven frame 37 drives the pin frame 31 to insert into the buckle frame 8 and the pressure frame 32. The fourth motor 28 drives the gear 29 to rotate, the gear 29 drives the ring gear 27 to rotate, the ring gear 27 drives the slewing frame 26 to rotate, the slewing frame 26 and the rotation limit frame 25 rotate relative to each other, the guide sleeve 30 and the driven elastic telescopic rod 33 rotate together with the slewing frame 26, and the guide sleeve 30 drives the pin frame 31 to drive the buckle frame 8 and the pressure frame 32 to rotate, so as to drive the casing 7 to rotate. Under the magnetic attraction of the first electromagnet 12 to the first permanent magnet 35, the first permanent magnet 35 drives the synchronous frame 34 to lift, and then the chute frame 36 drives the driven frame 37 to move, so that the driven frame 37 drives the pin frame 31 to disengage from the buckle frame 8 and the pressure frame 32, so as to release the limiting connection of the limit rotation drive unit 6 to the buckle frame 8 and the casing 7.

[0041] In one case of this embodiment, the pneumatic filling portion 10 includes a hollow shell 38 inserted into the protective tube 7, and the hollow shell 38 is fixedly connected with two groups of symmetrically arranged abutment strips 39, and the two adjacent groups of abutment strips 39 respectively installed on the two adjacent groups of hollow shells 38 abut each other, and the abutment strips 39 abut each other with the pressing frame 32, and a separation layer 40 is fixedly installed on the side surface of the hollow shell 38 facing the rotation axis of the protective tube 7, and multiple groups of through holes 41 are provided on the separation layer 40 and the hollow shell 38, and the through holes 41 of the separation layer 40 are interconnected with the through holes 41 at the same height on the hollow shell 38, and the two groups of through holes 41 that are interconnected are commonly connected with a group of hot melt adhesive layers 42, and the hot melt adhesive Layer 42 is fixedly connected to an electric heating ring 43 installed in a hollow shell 38, and two groups of symmetrically arranged extrusion strips 44 are slidingly installed in the hollow shell 38. A glue cavity 45 is provided between the two groups of extrusion strips 44 in the same hollow shell 38, and the hollow shell 38 is threadedly connected to a glue injection plug 62. An air cavity 46 is provided between a group of extrusion strips 44 and the hollow shell 38, and the hollow shell 38 is fixedly connected to a first pair of joints 47, and the first pair of joints 47 is fixedly connected to a first conductive ring 48, and the first conductive ring 48 is electrically connected to the electric heating ring 43, and the first pair of joints 47 is movably connected to the variable high gas supply power supply part 11, and the variable high gas supply power supply part 11 is movably connected to the first conductive ring 48. Remove the glue injection plug 62 to fill the glue cavity 45 with transparent epoxy resin glue, and then after the high-pressure gas supply power supply part 11 is connected to the first joint 47 and the first conductive ring 48, the electric heating ring 43 heats up, the hot melt glue layer 42 melts, and the air pressure in the air cavity 46 increases, so that the high-pressure gas in the air cavity 46 pushes the extrusion bar 44, so that the extrusion bar 44 presses the transparent epoxy resin glue in the glue cavity 45, so that the transparent epoxy resin glue enters the core sample through the through hole 41, and then the saw barrel 18 cuts the separation layer 40 to separate the core sample after the glue is injected.

[0042] In one case of this embodiment, the variable height gas supply power supply unit 11 includes two sets of active telescopic frames 49 fixedly connected to the lifting frame 24, the mobile end of the active telescopic frame 49 is fixedly connected to the fixed frame 50, the fixed frame 50 is fixedly connected to the hollow ring 51, the hollow ring 51 is fixedly connected to multiple sets of fixed pipes 52, the fixed pipes 52 are fixedly connected to the second pair of joints 53, the second pair of joints 53 are fixedly connected to the second conductive ring 54, the second conductive ring 54 is electrically connected to an external power supply, the first pair of joints 47 and the second docking The head 53 is movably connected, the first conductive ring 48 is movably connected to the second conductive ring 54, the hollow ring 51 is fixedly connected to a hose 55, the hose 55 is fixedly connected to an air pressure detection probe 56, the air pressure detection probe 56 is used to perform air pressure detection operations, the hose 55 is fixedly connected to a reversing valve 57, the reversing valve 57 is fixedly connected to the lifting frame 24, the reversing valve 57 is fixedly connected to a pressure pump 58, the reversing valve 57 is fixedly connected to a negative pressure pump 59, and the pressure pump 58 and the negative pressure pump 59 are both fixedly connected to the lifting frame 24. The active telescopic frame 49 is used to adjust the height of the fixed frame 50, thereby adjusting the height of the hollow ring 51. The hollow ring 51 drives the second pair of joints 53 to move through the fixed tube 52 to adjust the position of the second pair of joints 53, so that the second pair of joints 53 and the first pair of joints 47 are docked and connected, and the first conductive ring 48 and the second conductive ring 54 are abutted and electrically connected. When the reversing valve 57 is connected to the pressure pump 58 and the hose 55, the pressure pump 58 starts and performs an inflation operation to increase the pressure in the air cavity 46, thereby pushing the extrusion strip 44 to move. When the reversing valve 57 is connected to the negative pressure pump 59 and the hose 55, the pressure pump 58 starts and performs an exhaust operation to reduce the air pressure in the air cavity 46, thereby adjusting the position of the extrusion strip 44.

[0043] In one aspect of this embodiment, a ridge 60 is provided in the hollow shell 38 . The ridge 60 is used to limit the movement of the extrusion strip 44 to prevent the air cavity 46 from being completely filled by the extrusion strip 44 .

[0044] Example 2, based on Example 1, refer to Figures 6 to 8 The abutment strip 39 is provided with an inclined surface, and a triangular protruding surface 61 is provided in the hollow shell 38 to match the inclined surface shape of the abutment strip 39. By providing the triangular protruding surface 61, the movement of the abutment strip 39 is restricted, thereby preventing the abutment strip 39 from blocking the through hole 41.

[0045] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions, and alterations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A special coring device for hard and broken formations in geothermal drilling, comprising a counterweight support, a counterweight block fixedly connected to the counterweight support, and a console fixedly connected to the counterweight support, characterized in that: Also includes: The rotary drilling sample structure connected to the counterweight support, the rotary drilling sample structure includes a rotary lifting drive unit connected to the counterweight support, a limited rotary driving unit is installed on the rotary lifting drive unit, and the rotary lifting drive unit is used to adjust the height and inclination angle of the limited rotary driving unit, the limited rotary driving unit is connected to the casing, the outer wall of the casing is fixedly connected to four sets of buckle frames movably connected to the limited rotary driving unit, the lower end of the casing is fixedly installed with a core drill bit, four sets of pneumatic filling parts distributed along the circumference are installed in the casing, the pneumatic filling parts are used to enclose the core sample and store transparent epoxy resin glue, two adjacent sets of pneumatic filling parts abut each other, the pneumatic filling parts are movably connected to a variable height air supply power supply unit, when the variable height air supply power supply unit performs a pressurizing operation on the pneumatic filling part, the pneumatic filling part performs a glue injection and clamping operation on the core sample, the variable height air supply power supply unit is connected to the rotary lifting drive unit, the variable height air supply power supply unit is connected to two sets of first electromagnets, and the first electromagnet is magnetically coupled with the limited rotary driving unit; The power-assisted separation part is connected to the rotating and lifting drive part, and the power-assisted separation part includes a first motor fixedly connected to the rotating and lifting drive part, the output shaft of the first motor is fixedly connected to the rotating frame, the rotating frame is fixedly connected to the second motor, and the output shaft of the second motor is fixedly connected to the saw cylinder through the connecting frame, and the end of the saw cylinder is provided with an annularly arranged saw teeth, and the saw cylinder is used to separate the core sample that is bonded to the pneumatic filling part.

2. The special coring equipment for hard and broken formations in geothermal drilling according to claim 1, characterized in that: The rotation and lifting drive unit includes a guide frame hinged to the counterweight support, the guide frame is hinged with a first active telescopic rod, the first active telescopic rod is hinged to the counterweight support, the guide frame is fixedly connected to a third motor, the output shaft of the third motor is fixedly connected to a screw rod, the screw rod is threadedly connected to a lifting frame slidably connected to the guide frame, the lifting frame is connected to the limited rotation drive unit, and the lifting frame is connected to the variable height air supply power supply unit.

3. The special coring equipment for hard and broken formations in geothermal drilling according to claim 2, characterized in that: The transmission mechanism that this invention relates to is that this invention relates to a gear which is fixedly mounted on the driving mechanism, and this gear is connected with this gear by the gear train of this invention, and this gear train is connected with this gear train respectively.

4. The special coring equipment for hard and broken formations in geothermal drilling according to claim 3, characterized in that: The pneumatic filling part includes a hollow shell inserted in the casing, and the hollow shell is fixedly connected with two sets of symmetrically arranged abutment strips, and the adjacent two sets of abutment strips respectively installed on the two adjacent sets of hollow shells abut each other, and the abutment strips and the pressure frame abut each other, and a separation layer is fixedly installed on one side of the hollow shell facing the rotation axis of the casing, and multiple sets of through holes are provided on the separation layer and the hollow shell, and the through holes of the separation layer are interconnected with the through holes at the same height on the hollow shell, and the two sets of through holes that are interconnected are commonly connected with a set of hot melt adhesive layers, and the hot melt adhesive layer is fixed It is connected to an electric heating ring installed in a hollow shell, and two groups of symmetrically arranged extrusion strips are slidingly installed in the hollow shell. A glue cavity is provided between the two groups of extrusion strips in the same hollow shell, and a glue injection plug is threadedly connected to the hollow shell. An air cavity is provided between a group of extrusion strips and the hollow shell. The hollow shell is fixedly connected to a first pair of joints, and the first pair of joints is fixedly connected to a first conductive ring, which is electrically connected to the electric heating ring, and the first pair of joints is movably connected to a variable-height gas supply and power supply part, and the variable-height gas supply and power supply part is movably connected to the first conductive ring.

5. The special coring equipment for hard and broken formations in geothermal drilling according to claim 4, characterized in that: The variable height air supply and power supply unit includes two groups of active telescopic frames fixedly connected to the lifting frame, the movable end of the active telescopic frame is fixedly connected to the fixed frame, the fixed frame is fixedly connected to a hollow ring, the hollow ring is fixedly connected to multiple groups of fixed pipes, the fixed pipes are fixedly connected to a second pair of joints, the second pair of joints are fixedly connected to a second conductive ring, the first pair of joints and the second pair of joints are movably connected, the first conductive ring and the second conductive ring are movably connected, the hollow ring is fixedly connected to a hose, the hose is fixedly connected to an air pressure detection probe, the hose is fixedly connected to a reversing valve, the reversing valve is fixedly connected to the lifting frame, the reversing valve is fixedly connected to a pressure pump, the reversing valve is fixedly connected to a negative pressure pump, and the pressure pump and the negative pressure pump are both fixedly connected to the lifting frame.

6. The special coring equipment for hard and broken formations in geothermal drilling according to claim 4, characterized in that: A convex edge is arranged in the hollow shell.

7. The special coring equipment for hard and broken formations in geothermal drilling according to claim 4, characterized in that: The abutting strip is provided with an inclined surface, and the hollow shell is provided with a triangular protruding surface that matches the shape of the inclined surface of the abutting strip.

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