A coring device for hard broken formation in geothermal drilling

Abstract

The present invention relates to the field of geological sample preparation technology, specifically a special coring device for hard broken formations in geothermal drilling, comprising a counterweight support, and further comprising: a rotating drill sample structure connected to the counterweight support, the rotating drill sample structure comprising a rotating lifting drive unit, a limited rotation drive unit installed on the rotating lifting drive unit, the limited rotation drive unit connected to a casing, four sets of buckle frames fixedly connected to the outer wall of the casing, a core drill bit fixedly installed at the lower end of the casing, and four sets of pneumatic filling parts installed in the casing; and a power-assisted separation unit connected to the rotating lifting drive unit. The present invention uses the cooperation of the rotating drill sample structure and the power-assisted separation unit to fix the core sample in a broken and loose state by adding transparent epoxy resin glue while drilling the core sample, thereby avoiding complete collapse and mixing of the core sample during removal and transportation, which is beneficial to the subsequent observation and analysis of the core sample and reduces the difficulty of subsequent core sample analysis.

Description

TECHNICAL FIELD

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

[0002] Geothermal drilling is a drilling and well completion technology for exploring and developing geothermal energy reserves in the earth's crust. When surveying hard and broken strata, it is necessary to sample and study them first. The core samples drilled from the hard and broken strata are often loose and easily broken.

[0003] The general coring device can only be used to drill and take out the cores with strong integrity. However, since the cores drilled from the hard and broken strata are loose and easily broken, once the core samples are directly taken out after drilling, the internal structure of the core samples will collapse, the original information will be destroyed, the personnel cannot distinguish the conditions of the rock-soil at different depths, which is not conducive to the analysis of the hard and broken strata by the subsequent personnel. Meanwhile, such samples are not convenient to take out, transport and store. SUMMARY

[0004] The present application aims to provide a coring device special for hard and broken strata in geothermal drilling to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A coring device special for hard and broken strata in geothermal drilling, comprising a counterweight support, the counterweight support is fixedly connected with a counterweight block, the counterweight support is fixedly connected with a control console, further comprising:

[0007] A rotating drilling structure connected with the counterweight support, the rotating drilling structure comprises a rotating lifting driving part connected with the counterweight support, a limiting rotating driving part is installed on the rotating lifting driving part, the rotating lifting driving part is used to adjust the height and inclination angle of the limiting rotating driving part, the limiting rotating driving part is connected with a casing, the outer wall of the casing is fixedly connected with four groups of buckles movably connected with the limiting rotating driving part, the lower end of the casing is fixedly installed with a core drill bit, the casing is installed with four groups of pneumatic glue filling parts distributed in the circumferential direction, the pneumatic glue filling parts are used to surround the core samples and store transparent epoxy resin glue, the two adjacent groups of pneumatic glue filling parts abut against each other, the pneumatic glue filling parts are movably connected with a variable-height gas and power supply part, the pneumatic glue filling parts perform glue injection and clamping operations on the core samples when the variable-height gas and power supply part performs pressurizing operations on the pneumatic glue filling parts, the variable-height gas and power supply part is connected with the rotating lifting driving part, the variable-height gas and power supply part is connected with two groups of first electromagnets, the first electromagnets are magnetically coupled with the limiting rotating driving part;

[0008] The power-assisted separation part connected with the rotating lifting driving part comprises a first motor fixedly connected with the rotating lifting driving part, an output shaft of the first motor is fixedly connected with a rotating frame, the rotating frame is fixedly connected with a second motor, an output shaft of the second motor is fixedly connected with a saw cylinder through a connecting frame, and the saw cylinder is provided with annularly arranged saw teeth at an end thereof.

[0009] As a further improved scheme of the present application, the rotating lifting driving part comprises a guide frame hingedly connected with the counterweight support, the guide frame is hingedly connected with a first active telescopic rod, the first active telescopic rod is hingedly connected with the counterweight support, the guide frame is fixedly connected with a third motor, an output shaft of the third motor is fixedly connected with a lead screw, the lead screw is threadedly connected with a lifting frame slidingly connected with the guide frame, the lifting frame is connected with the position-limiting rotating driving part, and the lifting frame is connected with the variable-height gas supply and power supply part.

[0010] As a further improved scheme of the present application, the position-limiting rotating driving part comprises a rotating position-limiting frame fixedly connected with the lifting frame, the rotating position-limiting frame is rotatably connected with a slewing frame, the slewing frame is fixedly connected with a gear ring, the lifting frame is fixedly connected with a fourth motor, an output shaft of the fourth motor is fixedly connected with a gear wheel engaged with the gear ring, the slewing frame is fixedly provided with four groups of guide sleeves distributed at equal angles in the circumferential direction, the guide sleeves are slidingly connected with pin frames, the pin frames are movably connected with the buckle frames, the pin frames and the outer wall of the guard cylinder abut against each other, the four groups of pin frames are jointly pinned with a pressing frame, the pressing frame is movably connected with the guard cylinder, the pressing frame and the four groups of pneumatic filling parts abut against each other, the slewing frame is fixedly connected with a plurality of groups of driven elastic telescopic rods, the moving ends of the plurality of groups of driven elastic telescopic rods are jointly fixedly connected with a synchronous frame, the synchronous frame is fixedly provided with two groups of first permanent magnets magnetically coupled with the first electromagnets, the synchronous frame is fixedly connected with four groups of inclined chute frames, and the inclined chute frames are slidingly connected with driven frames fixedly connected with the pin frames.

[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 four groups of pneumatic glue filling parts, then the limiting rotation driving part drives the protection cylinder to rotate through the buckle frame, so that the protection cylinder drives the core drill bit to rotate, along with the rotation lifting driving part driving the limiting rotation driving part to move downward, the core drill bit drills into the rock-soil, during which the drilled core enters the annular space surrounded by the four groups of pneumatic glue filling parts, after the core drill bit moves to the pre-set depth, the limiting rotation driving part stops driving the protection cylinder, so that the protection cylinder and the core drill bit stop rotating, then the high gas and power supply part supplies high-pressure gas and power to the pneumatic glue filling part, so that the transparent epoxy resin glue in the pneumatic glue filling part is extruded 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 with the pneumatic glue filling part, then the rotation lifting driving part lifts the limiting rotation driving part, so that the protection cylinder and the core drill bit are lifted and separated from the drill hole, under the driving of the protection cylinder, the core sample injected with the transparent epoxy resin glue moves out of the drill hole, then the rotation lifting driving part drives the limiting rotation driving part to rotate, so that the protection cylinder is in a horizontal state, the rotation lifting driving part drives the limiting rotation driving part to move to provide space for the saw cylinder, along with the first motor driving the rotation frame to rotate, the rotation frame drives the second motor to move, the second motor drives the saw cylinder to move to the protection cylinder through the connecting frame, so that the saw cylinder is opposite to the core sample, then the rotation lifting driving part drives the limiting rotation driving part to continuously move to 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 glue filling part, so as to facilitate subsequent taking out of the core sample. The cooperation of the rotation drilling structure and the power separation part can fix the core sample in a broken and loose state by using the transparent epoxy resin glue, which is convenient for subsequent taking out and transportation of the core sample, avoids complete collapse and mixing of the core sample in the process of taking out and transportation, is beneficial to subsequent observation and analysis of the core sample, reduces the difficulty of subsequent analysis of the core sample, and facilitates long-term preservation of the core sample due to the sealing of the transparent epoxy resin glue. BRIEF DESCRIPTION OF DRAWINGS

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

[0018] Figure 2 It is another three-dimensional structure schematic diagram of the present application from another perspective;

[0019] Figure 3 It is a three-dimensional structure schematic diagram of the present application in which the partial rotation lifting driving part and the power separation part cooperate with each other;

[0020] Figure 4 It is another three-dimensional structure schematic diagram of the present application from another perspective in which the partial rotation lifting driving part and the power separation part cooperate with each other;

[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; 3, control console; 4, rotary drilling structure; 5, rotary lifting driving part; 6, limit rotary driving part; 7, casing; 8, buckle frame; 9, core bit; 10, pneumatic rubber filling part; 11, variable height gas supply and power supply part; 12, first electromagnet; 13, power-assisted separation part; 14, first motor; 15, rotary frame; 16, second motor; 17, connecting frame; 18, saw cylinder; 19, sawtooth; 20, guide frame; 21, first active telescopic rod; 22, third motor; 23, screw rod; 24, lifting frame; 25, rotary limit frame; 26, rotary frame; 27, gear ring; 28, fourth motor; 29, gear; 30, guide sleeve; 31, pin frame; 32, pressing frame; 33, driven elastic telescopic rod; 34, synchronization frame; 35, first permanent magnet; 36, inclined slot 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 containing cavity; 46, air cavity; 47, first butt joint; 48, first conductive ring; 49, active telescopic frame; 50, fixed frame; 51, hollow ring; 52, fixed tube; 53, second butt joint; 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 solutions of the present application will be further described in detail below in combination with specific embodiments.

[0035] Example one, refer to Figures 1-16 As shown in the figure, a special coring equipment for hard broken strata in geothermal drilling, comprising a counterweight support 1, the counterweight support 1 is fixedly connected with a counterweight 2, the counterweight support 1 is fixedly connected with a control console 3, the control console 3 is used for information processing and information interaction, further comprising:

[0036] The rotating drill sample structure 4 connected with the counterweight support 1, the rotating drill sample structure 4 includes a rotating lifting driving part 5 connected with the counterweight support 1, a limiting rotating driving part 6 is installed on the rotating lifting driving part 5, the rotating lifting driving part 5 is used for adjusting the height and inclination angle of the limiting rotating driving part 6, the limiting rotating driving part 6 is connected with a casing 7, the outer wall of the casing 7 is fixedly connected with four groups of buckle racks 8 movably connected with the limiting rotating driving part 6, the lower end of the casing 7 is fixedly installed with a core drill bit 9, the casing 7 is installed with four groups of pneumatic rubber filling parts 10 distributed in the circumferential direction, the pneumatic rubber filling part 10 is used for surrounding the core sample and storing transparent epoxy resin glue, two adjacent groups of pneumatic rubber filling parts 10 abut against each other, the pneumatic rubber filling part 10 is movably connected with a variable-height gas supply and power supply part 11, when the pneumatic rubber filling part 10 is pressurized, the pneumatic rubber filling part 10 performs the glue injection and clamping operation on the core sample, the variable-height gas supply and power supply part 11 is connected with the rotating lifting driving part 5, the variable-height gas supply and power supply part 11 is connected with two groups of first electromagnets 12, the first electromagnet 12 is magnetically coupled with the limiting rotating driving part 6;

[0037] The power-assisted separation part 13 connected with the rotating lifting driving part 5, the power-assisted separation part 13 includes a first motor 14 fixedly connected with the rotating lifting driving part 5, the output shaft of the first motor 14 is fixedly connected with a rotating frame 15, the rotating frame 15 is fixedly connected with a second motor 16, the output shaft of the second motor 16 is fixedly connected with a saw cylinder 18 through a connecting frame 17, the end of the saw cylinder 18 is provided with annularly arranged saw teeth 19, the saw cylinder 18 is used for separating the core sample adhered to the pneumatic rubber filling part 10.

[0038] The transparent epoxy resin glue is filled into the four groups of pneumatic glue filling parts 10, and then the limiting rotary 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, along with the rotary lifting driving part 5 driving the limiting rotary driving part 6 to move down, the core drill bit 9 drills into the rock-soil, during which the drilled core enters the annular space surrounded by the four groups of pneumatic glue filling parts 10, after the core drill bit 9 moves to the pre-set depth, the limiting rotary 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 and power supply part 11 supplies high-pressure gas and power to the pneumatic glue filling part 10, so that the transparent epoxy resin glue in the pneumatic glue filling part 10 is extruded 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 with the pneumatic glue filling part 10, and then the rotary lifting driving part 5 lifts the limiting rotary driving part 6, so that the casing 7 and the core drill bit 9 are lifted and separated from the drill hole, under the driving of the casing 7, the core sample injected with the transparent epoxy resin glue moves out of the drill hole, and then the rotary lifting driving part 5 drives the limiting rotary driving part 6 to rotate, so that the casing 7 is in a horizontal state, the rotary lifting driving part 5 drives the limiting rotary driving part 6 to move to provide space for the saw cylinder 18, along with the first motor 14 driving the rotary frame 15 to rotate, the rotary frame 15 drives the second motor 16 to move, the second motor 16 drives the saw cylinder 18 to move to the casing 7 through the connecting frame 17, so that the saw cylinder 18 is opposite to the core sample, and then the rotary lifting driving part 5 drives the limiting rotary driving part 6 to continuously move to the saw cylinder 18, while the second motor 16 drives the saw cylinder 18 to rotate through the connecting frame 17, so that the saw cylinder 18 cuts off the core sample combined with the transparent epoxy resin glue from the pneumatic glue filling part 10, so as to facilitate subsequent taking out of the core sample. The present application cooperates the rotary drilling structure 4 with the power separation part 13, fixes the core sample in a broken and loose state by using the transparent epoxy resin glue during drilling the core sample, facilitates subsequent taking out and transportation of the core sample, avoids complete collapse and mixing of the core sample during taking out and transportation, is beneficial to subsequent observation and analysis of the core sample, reduces the difficulty of subsequent analysis of the core sample, and facilitates long-term preservation of the core sample due to the sealing of the transparent epoxy resin glue.

[0039] In one instance of the embodiment, the rotating lifting driving part 5 comprises a guide frame 20 hinged with the counterweight support 1, the guide frame 20 is hinged with a first active telescopic rod 21 hinged with the counterweight support 1, the guide frame 20 is fixedly connected with a third motor 22, the output shaft of the third motor 22 is fixedly connected with a lead screw 23, the lead screw 23 is threadedly connected with a lifting frame 24 in sliding connection with the guide frame 20, the lifting frame 24 is connected with the limiting rotating driving part 6, and the lifting frame 24 is connected with the variable-height gas supply and power supply part 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 limiting rotating driving part 6 to rotate.

[0040] In one instance of the embodiment, the limiting rotating driving part 6 comprises a rotating limiting frame 25 fixedly connected with the lifting frame 24, the rotating limiting frame 25 is rotatably connected with a slewing frame 26, the slewing frame 26 is fixedly connected with a gear ring 27, the lifting frame 24 is fixedly connected with a fourth motor 28, the output shaft of the fourth motor 28 is fixedly connected with a gear wheel 29 in engagement with the gear ring 27, the slewing frame 26 is fixedly installed with four groups of guide sleeves 30 distributed at equal angles in the circumferential direction, the guide sleeves 30 are in sliding connection with pin frames 31, the pin frames 31 are movably connected with the buckle frames 8, the pin frames 31 abut against the outer wall of the casing 7, the four groups of pin frames 31 are collectively pinned with a group of pressing frames 32, the pressing frames 32 are movably connected with the casing 7, the pressing frames 32 abut against the four groups of pneumatic glue filling parts 10, the slewing frame 26 is fixedly connected with a plurality of driven elastic telescopic rods 33, the moving ends of the plurality of driven elastic telescopic rods 33 are collectively fixedly connected with a group of synchronous frames 34, the synchronous frames 34 are fixedly installed with two groups of first permanent magnets 35 in magnetic coupling with the first electromagnet 12, the synchronous frames 34 are fixedly connected with four groups of inclined chute frames 36, the inclined chute frames 36 are in sliding connection with driven frames 37 fixedly connected with the pin frames 31, under normal circumstances, the driven elastic telescopic rods 33 are in a contracted state, so that the driven frames 37 drive the pin frames 31 to insert into the buckle frames 8 and the pressing frames 32 under the limiting of the inclined chute frames 36. The fourth motor 28 drives the gear wheel 29 to rotate, the gear wheel 29 drives the gear ring 27 to rotate, the gear ring 27 drives the slewing frame 26 to rotate, the slewing frame 26 relatively rotates with the rotating limiting frame 25, the guide sleeves 30 and the driven elastic telescopic rods 33 rotate with the slewing frame 26, under the driving of the guide sleeves 30 on the pin frames 31, the pin frames 31 drive the buckle frames 8 and the pressing frames 32 to rotate, so as to drive the casing 7 to rotate, under the magnetic attraction of the first electromagnet 12 on the first permanent magnets 35, the first permanent magnets 35 drive the synchronous frames 34 to lift, and then the inclined chute frames 36 drive the driven frames 37 to move, so that the driven frames 37 drive the pin frames 31 to disengage from the buckle frames 8 and the pressing frames 32, to release the limiting connection of the limiting rotating driving part 6 on the buckle frames 8 and the casing 7.

[0041] In one case of the embodiment, the pneumatic glue filling part 10 comprises hollow shells 38 inserted into the casing 7, the hollow shells 38 are fixedly connected with two groups of abutting strips 39 arranged symmetrically, the two groups of abutting strips 39 installed on the adjacent two groups of hollow shells 38 abut against each other, the abutting strips 39 abut against the pressing frame 32, the hollow shells 38 are fixedly installed with separation layers 40 on the side surface facing the rotation axis of the casing 7, a plurality of groups of through holes 41 are formed on the separation layers 40 and the hollow shells 38, the through holes 41 of the separation layers 40 and the through holes 41 of the hollow shells 38 at the same height communicate with each other, the two groups of through holes 41 in communication are commonly connected with a group of hot melt glue layers 42, the hot melt glue layers 42 are fixedly connected with electric heating rings 43 installed in the hollow shells 38, the hollow shells 38 are slidably installed with two groups of extrusion strips 44 arranged symmetrically, the two groups of extrusion strips 44 in the same hollow shell 38 are provided with glue containing cavities 45, the hollow shells 38 are threadedly connected with glue injection plugs 62, one group of extrusion strips 44 and the hollow shells 38 are provided with air cavities 46, the hollow shells 38 are fixedly connected with first connectors 47, the first connectors 47 are fixedly connected with first conductive rings 48, the first conductive rings 48 are electrically connected with the electric heating rings 43, the first connectors 47 are movably connected with the variable height gas and power supply part 11, the variable height gas and power supply part 11 is movably connected with the first conductive rings 48. The glue injection plug 62 is removed, the transparent epoxy resin glue is injected into the glue containing cavity 45, then after the variable height gas and power supply part 11 is connected with the first connector 47 and the first conductive ring 48, the electric heating ring 43 is heated, the hot melt glue layer 42 is melted, and the air pressure in the air cavity 46 is increased, so that the high pressure gas in the air cavity 46 pushes the extrusion strip 44, the extrusion strip 44 pushes the transparent epoxy resin glue in the glue containing cavity 45, the transparent epoxy resin glue enters the core sample through the through hole 41, then the sawing cylinder 18 cuts the separation layer 40 to separate the core sample after glue injection.

[0042] In one case of the embodiment, the variable height air supply and power supply part 11 comprises two sets of active telescopic frames 49 fixedly connected with the lifting frame 24, the moving end of the active telescopic frame 49 is fixedly connected with a fixed frame 50, the fixed frame 50 is fixedly connected with a hollow ring 51, the hollow ring 51 is fixedly connected with a plurality of sets of fixed pipes 52, the fixed pipes 52 are fixedly connected with a second connector 53, the second connector 53 is fixedly connected with a second conductive ring 54, the second conductive ring 54 is electrically connected with an external power supply, the first connector 47 is movably connected with the second connector 53, the first conductive ring 48 is movably connected with the second conductive ring 54, the hollow ring 51 is fixedly connected with a hose 55, the hose 55 is fixedly connected with a gas pressure detection probe 56, the gas pressure detection probe 56 is used for gas pressure detection operation, the hose 55 is fixedly connected with a reversing valve 57, the reversing valve 57 is fixedly connected with the lifting frame 24, the reversing valve 57 is fixedly connected with a pressurizing pump 58, the reversing valve 57 is fixedly connected with a negative pressure pump 59, and the pressurizing pump 58 and the negative pressure pump 59 are both fixedly connected with the lifting frame 24. The active telescopic frame 49 is used for adjusting the height of the fixed frame 50, so as to adjust the height of the hollow ring 51, the hollow ring 51 drives the second connector 53 to move through the fixed pipe 52, so as to adjust the position of the second connector 53, so that the second connector 53 is connected and communicated with the first connector 47, and the first conductive ring 48 and the second conductive ring 54 abut and are electrically connected, when the pressurizing pump 58 and the hose 55 are communicated through the reversing valve 57, the pressurizing pump 58 is started and performs inflation operation, so as to increase the pressure of the air cavity 46, thereby driving the extrusion strip 44 to move, when the negative pressure pump 59 and the hose 55 are communicated through the reversing valve 57, the pressurizing pump 58 is started and performs air extraction operation, so as to reduce the air pressure in the air cavity 46, thereby adjusting the position of the extrusion strip 44.

[0043] In one case of the embodiment, the hollow shell 38 is provided with a convex edge 60. The convex edge 60 is used to limit the movement of the extrusion strip 44, so as to avoid that the air cavity 46 is completely filled by the extrusion strip 44.

[0044] In embodiment two, on the basis of embodiment one, referring to Figures 6-8 , the abutting strip 39 is provided with an inclined surface, and the hollow shell 38 is provided with a triangular protruding surface 61 matched with the shape of the inclined surface of the abutting strip 39. The triangular protruding surface 61 is provided to limit the movement of the abutting strip 39, so as to avoid that the abutting strip 39 blocks the through hole 41.

[0045] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application.

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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