A repair device and method for drilling plunger-shaped sample cores

Abstract

The present invention relates to a repair device and method for drilling a plunger-shaped sample core. The repair device comprises a frame, a lifting and clamping mechanism, a hole position adjustment mechanism, and a cutting mechanism disposed on the frame. The lifting and clamping mechanism comprises a loading and fixing space in which the core to be repaired is installed, and is capable of aligning the sampling hole on the core upward and fixing the core. The hole position adjustment mechanism comprises a liftable positioning mechanism located above the loading and fixing space and having a retracted state and an extended state. In the retracted state, the positioning mechanism can extend into the sampling hole. In the extended state, the positioning mechanism can uniformly press against the inner wall of the sampling hole in the radial direction within the sampling hole, thereby maintaining the sampling hole in a vertical state. The cutting mechanism comprises two coaxial and parallel cutting blades, the cutting paths of the two cutting blades being located on either side of the sampling hole. The present invention achieves the repair of a core after drilling a plunger-shaped sample.

Description

Technical Field

[0001] The present invention relates to the technical field of core repair, and in particular to a repair device and method for drilling plunger-shaped sample cores. Background Art

[0002] During geological exploration and development, it is necessary to obtain a variety of physical and chemical parameters of formation rocks, such as the porosity, permeability, diffusion coefficient, electrical properties, and elasticity of the target reservoir. These parameters are often obtained by obtaining plug-shaped core samples of various specifications from formation rock samples and then analyzing and testing them in the laboratory to obtain the required parameter data.

[0003] However, due to the difficulty and high cost of obtaining cores during deep drilling, core samples are extremely valuable. In practice, multiple plug-shaped core samples are sometimes drilled in batches at different locations within a single intact core, depending on research needs. This can lead to inappropriate drilling locations, failing to maximize core sample utilization. In addition, some lengths of intact core segments may exist between adjacent boreholes. Even if some scattered intact core segments exist, they often cannot meet the drilling requirements for subsequent plug-shaped core samples, resulting in core waste.

[0004] In addition, universities and research institutes not only have scientific research tasks, but also teaching tasks. Observing rock cores is a basic skill for students in geological colleges, and there is a relatively large demand for physical rock cores in teaching work. However, there are few opportunities to observe rock cores directly in the field or in a core library, and most students rarely have the opportunity to go on site and observe rock cores directly. Since each rock core is unique and very precious, and universities and research institutes have a lot of experimental work, they will take plug-shaped core samples from the cores. However, in most cases, after drilling a plug-shaped core sample from a core, some of the used core samples are often directly discarded. Even if cores from multiple drill holes are retained, it is difficult to directly observe the original overall and continuous characteristics of the core later. Therefore, it is necessary to repair the core after the plug-shaped sample is drilled to facilitate the multiple and repeated use of the core. Summary of the Invention

[0005] In view of the above analysis, embodiments of the present invention aim to provide a repair device and method for drilling plunger-shaped sample cores, so as to solve one or more of the above problems existing in the prior art.

[0006] The object of the present invention is achieved like this:

[0007] In one aspect, a repair device for drilling a plunger-shaped sample core is provided, comprising a frame and:

[0008] The lifting and clamping mechanism has a filling and fixing space, in which the core to be repaired is installed, and can make the sampling hole on the core face upward and fix the core;

[0009] The hole position adjustment mechanism includes a liftable positioning mechanism, the positioning mechanism being located above the filling fixed space and having a retracted state and an expanded state. The positioning mechanism in the retracted state can extend into the sampling hole, and the positioning mechanism in the expanded state can uniformly press against the inner wall of the sampling hole in the radial direction within the sampling hole, so that the sampling hole is in a vertical state.

[0010] The cutting mechanism comprises two coaxial and parallel arranged cutting knives, and the cutting paths of the two cutting knives are located on both sides of the sampling hole.

[0011] Furthermore, the lifting and clamping mechanism includes a lifting and clamping assembly and an adjustment assembly for driving the lifting and clamping assembly to perform a lifting and clamping action; the lifting and clamping assembly includes two symmetrically arranged mobile frames, the two mobile frames are provided with two opposite support plates, and a group of telescopic clamping assemblies are respectively provided at both ends of the mobile frames; the two symmetrically arranged support plates are configured to drag the core from the outer circumferential surface of the core, and the telescopic clamping assembly is configured to clamp and fix the core from both axial ends of the core.

[0012] Furthermore, the telescopic clamping assembly includes a hydraulic cylinder a arranged on a movable frame and a clamping plate arranged at the telescopic end of the hydraulic cylinder a.

[0013] Furthermore, the adjustment assembly includes a fixed plate arranged on the frame, a bidirectional screw rod a rotatably arranged on the fixed plate, and a motor a arranged on the fixed plate and driven by the bidirectional screw rod a. The bidirectional screw rod a is threadedly connected to the two movable frames respectively, and the movable frames are slidably arranged on the fixed plate.

[0014] Furthermore, the hole position adjustment mechanism includes a guide rod horizontally arranged on the frame, a sliding frame horizontally slidingly arranged on the guide rod, and a hydraulic cylinder b vertically arranged on the sliding frame; the positioning mechanism is arranged at the telescopic end of the hydraulic cylinder b, and the positioning mechanism includes multiple groups of positioning components evenly distributed in a ring shape and an adjustment component for driving the multiple groups of positioning components to move away or gather synchronously.

[0015] Furthermore, the adjustment assembly includes a lifting column vertically arranged at the telescopic end of the hydraulic cylinder b, a bidirectional screw rod b rotatably arranged at the bottom end of the lifting column, a motor b arranged at the bottom of the lifting column, a gear a connected to the output end of the motor b, a gear b meshing with the gear a and coaxially arranged on the bidirectional screw rod b, two symmetrically distributed screw nuts both threadedly connected to the bidirectional screw rod b, and a moving platform connected to the screw rod nut.

[0016] Furthermore, the positioning assembly includes two connecting rods that are symmetrically distributed up and down and are rotatably connected to the two moving platforms at one end on the same side, and a tensioning rod that is rotatably connected to the other end on the same side of the two connecting rods. The tensioning rods are vertically distributed, and a connecting rod is rotatably provided on the lifting column. A guide cylinder is rotatably provided on one tensioning rod, and the guide cylinder has a slideway for the connecting rod to slide.

[0017] Furthermore, the cutting mechanism also includes a power assembly for driving the two cutting blades to rotate and a moving assembly for driving the power assembly to move horizontally, and the moving assembly is arranged on the frame.

[0018] Furthermore, the support plate is a poorly curved plate, and the curved concave surface of the support plate fits the outer peripheral surface of the cylindrical rock core.

[0019] On the other hand, a method for repairing a core of a drilled plunger-shaped sample is also provided, wherein the core after the plunger-shaped sample is drilled is repaired using the above-mentioned repair device for the core of a drilled plunger-shaped sample; the repair method comprises the following steps:

[0020] S1. Install the core in the loading and fixing space of the lifting and clamping mechanism, and adjust the sampling hole of the core to face roughly upward;

[0021] S2. The positioning mechanism of the hole position adjustment mechanism descends and extends into the sampling hole of the core in a retracted state, and then changes from the retracted state to the extended state, so that the sampling hole is in a vertical state;

[0022] S3. Use the telescopic clamping assembly to clamp the axial ends of the core to complete the fixation before core cutting;

[0023] S4. Use the cutting mechanism to cut the fixed core to obtain a middle core and two side cores, and stick the cut surfaces of the two side cores together to obtain a core repair product.

[0024] Compared with the prior art, the repair device and method for drilling plunger-shaped sample cores provided by the present invention have at least one of the following beneficial technical effects:

[0025] 1. Use the hole position adjustment mechanism to adjust the core sampling hole to a vertical state to facilitate cutting with two cutting knives from both sides at the same time. Only one cut is required for the position of one sampling hole, which has higher cutting efficiency and the cutting surface is closer to the sampling hole, which can minimize material waste.

[0026] 2. The middle section of the original core where the sampling hole is located is cut off, leaving two side sections that do not contain the sampling holes. The two side sections are first coated with adhesive and then pressed and bonded. The resulting repaired product can be reused, and the core waste can be minimized during the repair process.

[0027] 3. The existing sampling holes on the core are fully utilized. During the cutting process, a retractable and expandable positioning mechanism is used to insert the core into the sampling hole to achieve accurate positioning before the core is cut. After positioning, the positioning rod can be used to make the cutting knife more accurately align with the parts that need to be cut on both sides of the sampling hole, thereby minimizing the waste of core samples caused by inaccurate cutting position.

[0028] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following description, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Schematic diagram of the structure of a repair device for drilling a plunger-shaped sample core in an embodiment of the present invention;

[0031] Figure 2 A cross-sectional view of a partial structure of a lifting and clamping mechanism according to an embodiment of the present invention;

[0032] Figure 3 This is a cross-sectional view of the structure of the positioning component in the sampling hole in an embodiment of the present invention;

[0033] Figure 4 for Figure 3 A magnified view of the structure at point A;

[0034] Figure 5 Schematic diagram of the structure of the cutting knife in an embodiment of the present invention;

[0035] Figure 6 for Figure 5 A magnified view of the structure at B in the middle;

[0036] Figure 7 A cross-sectional view of the local structure of the dust collecting cotton in an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure in which two side segments are tightly bonded together in an embodiment of the present invention;

[0038] Figure 9Schematic diagram of a cutting strike line parallel to the central axis of the core in an embodiment of the present invention;

[0039] Figure 10 Schematic diagram of the cutting strike line perpendicular to the central axis of the core in an embodiment of the present invention.

[0040] Reference numerals: 1, core; 100, sampling hole; 101, side core; 102, middle core; 2, support plate; 3, mobile frame; 4, motor a; 5, two-way screw a; 6, hydraulic cylinder a; 7, clamping plate; 8, baffle a; 9, baffle b; 10, fixed plate; 11, frame; 12, two-way screw b; 13, screw nut; 14, mobile platform; 15, connecting rod; 16, tensioning rod; 161, connecting rod; 162, guide cylinder; 1 7. Positioning rod; 18. Motor b; 19. Gear a; 20. Gear b; 21. Lifting column; 22. Hydraulic cylinder b; 23. Sliding frame; 24. Guide rod; 25. Cutting knife; 251. Knife shaft cylinder; 26. Rotating shaft; 27. Key; 28. Threaded knob; 29. ​​Mounting frame; 30. Motor c; 31. Fan; 32. Ventilation tube; 33. Dust-collecting cotton; 34. Sliding rod; 35. Screw; 36. Connecting table; 37. Motor d. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] To facilitate understanding of the embodiments of the present application, the following will be further explained with reference to specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation of the embodiments of the present application. In the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence may be performed in an order different from that described. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to that described. In addition, the same reference numerals represent the same components.

[0043] The terms used herein are for the purpose of describing specific embodiments and are not intended to be restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, the features, integral bodies, steps, operations, parts, assemblies and / or their groups stated are explained, but the presence or addition of one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups is not excluded. It should also be noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0044] Example 1

[0045] After the plunger-shaped sample is drilled, a sampling hole 100 is left on the core 1. In order to repair the core 1 having the sampling hole 100, the present invention discloses a specific embodiment, such as Figures 1 to 8 As shown in the figure, a repair device for drilling plunger-shaped sample cores is disclosed, comprising a frame 11 and a lifting and clamping mechanism, a hole position adjustment mechanism and a cutting mechanism arranged on the frame 11; the lifting and clamping mechanism has a filling and fixing space, and the core 1 to be repaired is installed in the filling and fixing space, and can make the sampling hole 100 on the core face upward and fix the core 1; the size of the filling and fixing space of the lifting and clamping mechanism is adjustable to accommodate cores 1 of different sizes; the hole position adjustment mechanism has a lifting and lowering positioning mechanism, which is located above the filling and fixing space and is fixed The positioning mechanism has a retracted state and an expanded state. The positioning mechanism in the retracted state can extend into the sampling hole 100 on the core 1. The positioning mechanism in the expanded state can radially and uniformly press the inner wall of the sampling hole 100 in the sampling hole 100, so that the sampling hole 100 is in a vertical state. It can also cooperate with the lifting and clamping mechanism to fix the core 1; the cutting mechanism has two coaxial and parallel cutting knives 25. The vertical distance between the two cutting knives 25 is greater than the diameter of the sampling hole 100, and the cutting paths of the two cutting knives 25 are located on both sides of the sampling hole 100.

[0046] like Figure 1 、 Figure 9 and Figure 10 As shown, the dotted line in the figure is the cutting direction of the cutting knife. Figure 1 and Figure 9 It shows that the cutting of the core is parallel to the center axis of the core. Figure 10 It is shown that the cutting of the core is carried out in a direction perpendicular to the central axis of the core.

[0047] In this embodiment, the lifting and clamping mechanism includes a lifting and clamping assembly and an adjustment assembly for driving the lifting and clamping assembly to perform a lifting and clamping action.

[0048] Continue to refer to Figures 1 to 2 The lifting and clamping assembly includes two symmetrically arranged mobile frames 3, each of which is provided with two opposing support plates 2. Each mobile frame 3 is provided with a set of telescopic clamping assemblies at both ends. The two support plates 2 are used to drag the core to be cut from the outer circumferential surface of the core, and the telescopic clamping assembly is used to clamp and fix the core 1 from both axial ends of the core 1. The telescopic clamping assembly includes a hydraulic cylinder a6 provided on the mobile frame 3 and a clamping plate 7 provided at the telescopic end of the hydraulic cylinder a6. The telescopic end of the hydraulic cylinder a6 can drive the clamping plate 7 to move horizontally, thereby clamping or releasing the core 1 from both axial ends. It can be understood that the space enclosed by the multiple support plates 2 and the multiple clamping plates 7 is the loading and fixing space of the lifting and clamping mechanism.

[0049] In one optional embodiment, the support plate 2 is a slightly curved plate, and the curved concave surface of the support plate 2 fits the outer circumference of the cylindrical core 1. Two or four support plates 2 can be used to drag the outer circumference of the core to be cut from both sides or below the core.

[0050] In this embodiment, the adjustment component can drive the mobile frames 3 to move toward or away from each other, thereby driving the paired support plates 2 to move closer to or away from each other, thereby achieving the lifting of the core 1 during the cutting process and moving the two side segment cores 101 toward each other and docking after cutting. Specifically, the adjustment component includes a fixed plate 10 set on the frame 11, a bidirectional screw a5 rotatably set on the fixed plate 10, and a motor a4 set on the fixed plate 10 and driven by the bidirectional screw a5. The bidirectional screw a5 is threadedly connected to the two mobile frames 3, and the mobile frames 3 are slidably set on the fixed plate 10. The output end of the motor a4 can rotate forward and reverse, and the motor a4 drives the bidirectional screw a5 to rotate. The bidirectional screw a5 drives the two mobile frames 3 to move toward or away from each other. After removing the middle segment core 102, an adhesive is applied to the cutting surface of the side segment core 101, and the two mobile frames 3 are moved toward each other, so that the two side segment cores 101 move toward each other and dock.

[0051] In one optional embodiment, the two movable frames 3 are each provided with a horizontally arranged baffle a8 and baffle b9, with baffles a8 and b9 being staggered vertically. After the center core 102 is cut, it falls onto baffle b9 due to its own gravity. Baffles a8 and b9 provide support and block dust generated during cutting, minimizing the impact on the threaded connection between the bidirectional screw a5 and the movable frames 3.

[0052] In this embodiment, the function of the hole position adjustment mechanism is to enable the core 1 to rotate to a state where the sampling hole 100 is vertically facing upward, and at the same time cooperate with the lifting and clamping mechanism to fix the core 1 in the filling and fixing space of the lifting and clamping mechanism, and cut the core 1 in this state.

[0053] Reference Figure 1 、 Figure 3 and Figure 4 The hole position adjustment mechanism includes a guide rod 24 horizontally mounted on the frame 11, a sliding frame 23 horizontally slidingly mounted on the guide rod 24, and a hydraulic cylinder b22 vertically mounted on the sliding frame 23. A positioning mechanism is mounted at the telescopic end of the hydraulic cylinder b22. The positioning mechanism has a retracted state and an extended state. In the retracted state, the positioning mechanism can extend into the sampling hole 100 on the core 1. In the extended state, the positioning mechanism can uniformly press against the inner wall of the sampling hole 100 radially within the sampling hole 100, so that the centerline of the sampling hole 100 is vertical. The positioning mechanism includes multiple groups of positioning components evenly distributed in an annular shape and an adjustment component for driving the multiple groups of positioning components to move away or together synchronously. The adjustment component is used to achieve the contraction and expansion of the multiple groups of positioning components. Initially, slide frame 23 is slid to a position where the positioning mechanism faces the sampling hole 100 of core 1. Then, hydraulic cylinder b22 is used to extend the retracted positioning mechanism downward into the sampling hole 100. The multiple positioning assemblies are then moved away by the adjustment assembly, allowing the positioning mechanism to expand within the sampling hole 100 and press against the wall of the core in the sampling hole 100. During the expansion of the positioning mechanism, core 1 rotates about the centerline of the sampling hole 100, and core 1 and support plate 2 rotate into contact, allowing core 1 to rotate to a position where the sampling hole 100 is vertically facing upward. In this embodiment, the expanded and retracted states of the positioning mechanism correspond to the expanded and retracted states of the multiple positioning assemblies.

[0054] In one optional embodiment, referring to Figure 4 The adjustment assembly includes a lifting column 21 vertically mounted at the telescopic end of a hydraulic cylinder b22, a bidirectional lead screw b12 rotatably mounted at the bottom end of the lifting column 21, a motor b18 mounted at the bottom of the lifting column 21, a gear a19 connected to the output end of the motor b18, a gear b20 meshing with the gear a19 and coaxially mounted on the bidirectional lead screw b12, two symmetrically distributed lead screw nuts 13 threadedly connected to the bidirectional lead screw b12, and a movable platform 14 connected to the lead screw nuts 13. Motor b18 can drive gear a19 in both forward and reverse rotations, which in turn drives gear b20, which in turn drives the bidirectional lead screw b12. The bidirectional lead screw b12 then drives the two lead screw nuts 13 to move toward or away from each other, causing the two movable platforms 14 to move toward or away from each other synchronously.

[0055] In one of the optional embodiments, continue to refer to Figure 4The positioning assembly includes two connecting rods 15 symmetrically arranged vertically, each rotatably connected to the two movable platforms 14 at one end on the same side, and a tensioning rod 16 rotatably connected to the other ends on the same side of the two connecting rods 15. The tensioning rods 16 are vertically arranged. A connecting rod 161 is rotatably mounted on the lifting column 21. A guide cylinder 162 is rotatably mounted on one of the tensioning rods 16. The guide cylinder 162 has a slideway for the sliding of the connecting rod 161. When the bidirectional screw rod b12 rotates, the connecting rod 161 and guide cylinder 162 restrict the two movable platforms 14 to vertical movement. The multiple tensioning rods 16 move horizontally in a vertical state, moving away from or converging synchronously. The tensioning rods 16 are tightened against the inner wall of the sampling hole 100 of the core 1, expanding the core 1 to a vertical distribution state in which the sampling holes 100 are vertically arranged.

[0056] In particular, four positioning assemblies can be provided, with positioning rods 17 connected to the tops of two laterally opposed tensioning rods 16. The two positioning rods 17 are located inside the two cutting blades 25. When the two tensioning rods 16 drive the two positioning rods 17 outward, the positioning rods 17 can indicate the position of the cutting blades 25. When the cutting blades 25 are in contact with the positioning rods 17, the position of the cutting blades 25 is determined. If the cutting blades 25 cut the core 1 laterally in this position, they will just avoid the sampling hole 100 of the core 1, and the cut middle core 102 will be smaller in size, resulting in less waste.

[0057] In this embodiment, the cutting mechanism further includes a power assembly for rotating the two cutting blades 25 and a moving assembly for driving the power assembly horizontally; the moving assembly is mounted on the frame 11. Upon activation of the power assembly, the two cutting blades 25 rotate simultaneously, and the moving assembly drives the two high-speed rotating cutting blades 25 to move horizontally, severing the core 1. The cutting paths of the two cutting blades are located on either side of the sampling hole 100 in the core 1. The side core segments 101 on both sides do not contain the sampling hole 100, and the cutting surface is a vertically distributed plane, facilitating subsequent pressure bonding.

[0058] like Figure 5 and Figure 6As shown, the power assembly includes a mounting frame 29, a rotating shaft 26 rotatably mounted on the mounting frame 29, and a motor c30 mounted on the mounting frame 29 and drivingly connected to the rotating shaft 26. The rotating shaft 26 has a keyway on its outer circumference, and a key 27 is disposed in the keyway. The motor c30 drives the rotating shaft 26 to rotate. A cutter shaft cylinder 251 is slidably mounted on the rotating shaft 26 and key 27. The rotating shaft 26 drives the cutter shaft cylinder 251 to rotate via the key 27. The cutter shaft cylinder 251 is connected to the cutting blade 25. A threaded knob 28 is threadedly connected to the cutter shaft cylinder 251, which abuts against the key 27. The threaded knob 28 is used to determine the lateral position of the cutter shaft cylinder 251, thereby determining the lateral position of the cutter 25. The cutter 25 is adjusted to a position where the inner surface of the cutter 25 is in contact with the positioning rod 17 and fixed. The parallel distance between the two cutters 25 is adjustable and can be adjusted and controlled according to the aperture size of the sampling hole 100 so that the cutting path is as close as possible to the inner wall of the sampling hole 100. After the positioning assembly is moved upward from the sampling hole 100 of the core 1, the positioning mechanism moves away from the moving path of the cutter 25 and will not affect the cutting of the core 1 by the cutter 25.

[0059] In one optional embodiment, referring to Figure 1 The moving assembly includes a slide bar 34 mounted on the frame 11, a screw rod 35 rotatably mounted on the frame 11 and parallel to the slide bar 34, a motor d37 mounted on the frame 11 and drivingly connected to the screw rod 35, and two connecting platforms 36 mounted on the mounting frame 29. One connecting platform 36 is slidably connected to the slide bar 34, and the other connecting platform 36 is threadedly connected to the screw rod 35. The motor d37 can drive the screw rod 35 in forward and reverse rotation, which in turn drives the connecting platform 36 to move. The slide bar 34 acts as a guide, and the connecting platform 36 can drive the mounting frame 29 to move, thereby moving the cutting blade 25, which then cuts the core 1 axially.

[0060] It should be noted that Figures 1 to 2 The lifting and clamping mechanism shown in the figure is suitable for cutting the core parallel to the central axis of the core. It is understandable that a lifting and clamping mechanism suitable for cutting the core perpendicular to the central axis of the core can be realized by those skilled in the art by simply adjusting the corresponding structure based on the inventive concept of this application. For example, the lifting and clamping mechanism for cutting the core perpendicular to the central axis of the core can include four supporting plates 2, with two groups of supporting plates 2 supporting the outer peripheral surfaces of the core 1 at both axial ends, and the length of the supporting plates 2 is preferably such that it does not affect the cutting on both sides of the sampling hole.

[0061] In order to improve the dust removal effect, a ventilation channel is provided on the mounting frame 29, and a fan 31 and a ventilation tube 32 are respectively provided on both sides of the ventilation channel. A plurality of dust-collecting cottons 33 are arranged side by side on the inside of the ventilation tube 32. The fan 31 blows air into the ventilation tube 32, and the dust generated by cutting flows into the ventilation tube 32 under the action of the negative pressure of the air and is absorbed by the dust-collecting cotton 33. The filtered air is discharged from the exhaust hole at the outer end of the ventilation tube 32.

[0062] This embodiment also discloses a method for repairing a core sample obtained by drilling a plunger-shaped sample, using the aforementioned repair device for a core sample obtained by drilling a plunger-shaped sample to repair the core 1 after the plunger-shaped sample is drilled, that is, to repair the core having the sampling hole. Specifically, the repair method includes the following steps:

[0063] S1. Install the core 1 to be repaired in the filling and fixing space of the lifting and clamping mechanism, and manually adjust the sampling hole 100 of the core 1 to be approximately upward.

[0064] Specifically, the core 1 to be repaired is placed on two supporting plates 2, and the sampling holes 100 on the core 1 are manually adjusted to an upward distribution state. At this time, the manual visual adjustment can only adjust the sampling holes 100 to a basic upward distribution, not a completely accurate vertical upward distribution;

[0065] S2. The positioning mechanism of the hole position adjustment mechanism descends and extends into the sampling hole 100 of the core 1 in a retracted state. Then, the retracted state changes to an expanded state, so that the sampling hole 100 is in a vertical state, completing the precise angular positioning of the core sampling hole 100.

[0066] Specifically, the horizontal position of the sliding frame 23 is adjusted. When the positioning mechanism is directed toward the sampling hole 100 of the core 1 below, the hydraulic cylinder b22 drives the positioning mechanism downward, and the positioning assembly moves into the sampling hole 100 of the core 1. The positioning mechanism causes multiple groups of positioning assemblies to move away from each other synchronously through the adjustment assembly. The multiple groups of positioning assemblies are tightened on the inner wall of the sampling hole 100 of the core 1. When the multiple groups of positioning assemblies move away from each other, they drive the core 1 to roll on the supporting plate 2. After the multiple groups of positioning assemblies are fully tightened, the core 1 rolls to a state where the sampling holes 100 are distributed upward.

[0067] S3. Use the telescopic clamping assembly to clamp the axial ends of the core 1 to fix the core 1, thereby completing the fixation before core cutting.

[0068] Specifically, four sets of telescopic clamping assemblies are respectively clamped at the two axial ends of the core 1, two sets of relatively distributed telescopic clamping assemblies are respectively clamped at the left sides of the two axial ends of the core 1, and the other two sets of relatively distributed telescopic clamping assemblies are respectively clamped at the right sides of the two axial ends of the core 1, that is, respectively clamped at the two ends of the side segment core 101;

[0069] S4. Use the cutting mechanism to cut the fixed core 1 to obtain a middle core 102 and two side cores 101. Paste the cut surfaces of the two side cores 101 together to complete the core repair and obtain a core repair product.

[0070] Specifically, the power assembly is started, and the power assembly drives the two cutting knives 25 to rotate, and the moving assembly drives the power assembly to move horizontally, and the two cutting knives 25 cut the core 1 into three sections, namely the middle section core 102 and the two side section cores 101 on both sides. The sampling hole 100 of the core 1 is located on the middle section core 102, and the cutting knife 25 passes through one side of the edge of the sampling hole 100 without being too far away, thereby avoiding a large waste of cores; the middle section core 102 is removed, and the two side section cores 101 are still clamped by the telescopic clamping assembly and will not fall off; an adhesive can be applied to the cutting surfaces of the two side section cores 101; wherein, the composition of the adhesive can be prepared according to the petrological properties near the cutting surface, for example, the damaged core can be crushed into particles or powder, or the cut core block can be ground into powder and mixed with an organic adhesive to make an adhesive, so that the petrological physical properties of the bonding part can be as similar as possible to or similar to the petrological properties of the original core;

[0071] In step S4, when the two side cores 101 are attached, the two sets of lifting and clamping assemblies are adjusted toward each other by using the adjustment assembly until the two side cores 101 are tightly pressed together. The repaired part is then pressed and fixed for a predetermined time, such as 2-3 hours. Finally, the repaired part can be released by using the telescopic clamping assembly and removed.

[0072] It should be noted that between steps S3 and S4, the following step may also be included: the positioning mechanism of the hole position adjustment mechanism is changed from an expanded state to a retracted state, and is raised and removed from the sampling hole 100 of the core 1. In other words, the multiple sets of positioning components are gathered together, and the positioning mechanism is driven upward by the hydraulic cylinder b22 to move the positioning components upward out of the sampling hole 100 of the core 1. In other words, during the cutting process, the core 1 can be fixed only by the lifting and clamping mechanism.

[0073] Of course, during the cutting process, the positioning mechanism of the hole position adjustment mechanism is always in an expanded state in the sampling hole 100 of the core 1, and the core 1 can be fixed by using the expanded positioning mechanism in conjunction with the lifting and clamping mechanism. This can better fix the core 1, especially for high-hardness cores, to avoid the core position from shifting during the cutting process.

[0074] Compared with the prior art, the repair device and method for drilled plunger-shaped sample cores provided in this embodiment can adjust the sampling hole on the core to a vertical state to facilitate cutting using two cutting knives from both sides at the same time. The cutting efficiency is higher, and the cutting surface is closer to the sampling hole, which can reduce the waste of cores to a smaller extent. The two side core segments are coated with adhesive for pressure bonding, and the resulting repaired product can be reused.

[0075] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of this application. It should be understood that the above description is only the specific implementation methods of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A repair device for drilling plunger-shaped sample cores, characterized in that: It comprises a frame (11) and a device arranged on the frame (11): The lifting and clamping mechanism has a filling and fixing space, in which the core (1) to be repaired is installed, and is capable of making the sampling hole (100) on the core (1) face upward and fixing the core (1); The hole position adjustment mechanism has a liftable positioning mechanism, the positioning mechanism is located above the filling fixed space, the positioning mechanism has a contracted state and an expanded state, the positioning mechanism in the contracted state can extend into the sampling hole (100), and the positioning mechanism in the expanded state can uniformly press the inner wall of the sampling hole (100) in the radial direction in the sampling hole (100), so that the sampling hole (100) is in a vertical state; the hole position adjustment mechanism also includes a guide rod (24) horizontally arranged on the frame (11), a sliding frame (23) horizontally slidably arranged on the guide rod (24) and a hydraulic cylinder b (22) vertically arranged on the sliding frame (23); the positioning mechanism is arranged at the telescopic end of the hydraulic cylinder b (22), the positioning mechanism includes a plurality of positioning components uniformly distributed in an annular shape and an adjustment component for driving the plurality of positioning components to synchronously move away or gather; the adjustment component includes a lifting column (21) vertically arranged at the telescopic end of the hydraulic cylinder b (22) ), a bidirectional screw rod b (12) rotatably arranged at the bottom end of the lifting column (21), a motor b (18) arranged at the bottom of the lifting column (21), a gear a (19) connected to the output end of the motor b (18), a gear b (20) meshing with the gear a (19) and coaxially arranged on the bidirectional screw rod b (12), two screw nuts (13) symmetrically distributed and both threadedly connected to the bidirectional screw rod b (12), and a moving platform (14) connected to the screw nuts (13); the positioning assembly includes two connecting rods (15) symmetrically distributed up and down and rotatably connected to the two moving platforms (14) at one end on the same side, and a tensioning rod (16) rotatably connected to the other end on the same side of the two connecting rods (15), the tensioning rod (16) is vertically distributed, a connecting rod (161) is rotatably arranged on the lifting column (21), and a guide cylinder (162) is rotatably arranged on one tensioning rod (16), and the guide cylinder (162) has a slideway for the connecting rod (161) to slide; The cutting mechanism comprises two coaxial and parallel arranged cutting knives (25), wherein the cutting paths of the two cutting knives (25) are located on both sides of the sampling hole (100).

2. The repair device for drilling plunger-shaped sample core according to claim 1, characterized in that: The lifting and clamping mechanism includes a lifting and clamping assembly and an adjustment assembly for driving the lifting and clamping assembly to perform a lifting and clamping action; The lifting and clamping assembly comprises two symmetrically arranged mobile frames (3), the two mobile frames (3) are provided with two opposite supporting plates (2), and a group of telescopic clamping assemblies are respectively provided at both ends of the mobile frames (3); the two symmetrically arranged supporting plates (2) are configured to drag the core (1) from the outer circumferential surface of the core (1), and the telescopic clamping assemblies are configured to clamp and fix the core (1) from the axial ends of the core (1).

3. The repair device for drilling plunger-shaped sample core according to claim 2, characterized in that: The telescopic clamping assembly comprises a hydraulic cylinder a (6) arranged on a movable frame (3) and a clamping plate (7) arranged at the telescopic end of the hydraulic cylinder a (6).

4. The repair device for drilling plunger-shaped sample core according to claim 3, characterized in that: The adjustment assembly comprises a fixed plate (10) arranged on the frame (11), a bidirectional screw rod a (5) rotatably arranged on the fixed plate (10), and a motor a (4) arranged on the fixed plate (10) and drivingly connected to the bidirectional screw rod a (5), wherein the bidirectional screw rod a (5) is respectively threadedly connected to two movable frames (3), and the movable frames (3) are slidably arranged on the fixed plate (10).

5. The repair device for drilling plunger-shaped sample core according to claim 1, characterized in that: The cutting mechanism further comprises a power assembly for driving the two cutting knives (25) to rotate and a moving assembly for driving the power assembly to move horizontally, and the moving assembly is arranged on the frame (11).

6. The repair device for drilling plunger-shaped sample core according to claim 2, characterized in that: The support plate (2) is a poorly curved plate, and the curved concave surface of the support plate (2) fits the outer peripheral surface of the cylindrical rock core (1).

7. A method for repairing a drilled plunger sample core, characterized in that: Repairing the core (1) after drilling the plunger-shaped sample using the repairing device for drilling the plunger-shaped sample core according to any one of claims 1 to 6; The repair method comprises the following steps: S1. Install the core (1) in the filling and fixing space of the lifting and clamping mechanism, and adjust the sampling hole (100) of the core (1) to be approximately upward; S2. The positioning mechanism of the hole position adjustment mechanism descends and extends into the sampling hole (100) of the core (1) in a retracted state, and then changes from the retracted state to the expanded state, so that the sampling hole (100) is in a vertical state; S3, using a telescopic clamping assembly to clamp the axial ends of the core (1) to complete the fixation before core cutting; S4. Using a cutting mechanism to cut the fixed rock core (1) to obtain a middle core (102) and two side cores (101), and gluing the cut surfaces of the two side cores (101) together to obtain a rock core repair product.

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