Repairing device and method for drilling plunger-shaped sample core

Abstract

The invention relates to a repairing device and method for a drilled plunger-shaped sample rock core, and the repairing device for the drilled plunger-shaped sample rock core comprises a rack, and a lifting clamping mechanism, a hole site adjusting mechanism and a cutting mechanism which are arranged on the rack; the lifting and clamping mechanism is provided with a filling and fixing space, a rock core to be repaired is mounted in the filling and fixing space, a sampling hole in the rock core can be upward, and the rock core can be fixed; the hole position adjusting mechanism is provided with a liftable positioning mechanism, the positioning mechanism is located above the filling fixing space, the positioning mechanism has a contraction state and an expansion state, the positioning mechanism in the contraction state can extend into the sampling hole, and the positioning mechanism in the expansion state can uniformly abut against the inner wall of the sampling hole in the sampling hole in the radial direction; the sampling hole is in a vertical state; the cutting mechanism is provided with two coaxial cutting knives which are arranged in parallel, and the cutting paths of the two cutting knives are located on the two sides of the sampling hole. According to the device and the method, the core after the plunger-shaped sample is drilled can be repaired.

Description

Technical Field

[0001] The 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] In the process of 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. To obtain these parameters, plug-shaped core samples of various specifications are often obtained from formation rock samples, and the obtained plug-shaped core samples are analyzed and tested in the laboratory to obtain the required parameter data.

[0003] However, due to the difficulty and high cost of obtaining cores in deep drilling, core samples are particularly precious. In actual work, sometimes according to research needs, multiple plunger-shaped core samples are drilled in batches at different positions of a complete core. This is likely to lead to unreasonable positions for multiple drillings, failure to maximize the utilization of core samples, and a certain length of intact core segments between two adjacent boreholes. Even if there are some scattered intact core segments, they often cannot meet the drilling needs of subsequent plunger-shaped core samples, resulting in waste of cores.

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

[0005] In view of the above analysis, the embodiments of the present invention aim to provide a repair device and method for drilling a plunger-shaped sample core, 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 in that:

[0007] On the one hand, 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 the sampling hole on the core is directed upward and the core is fixed;

[0009] The hole position adjustment mechanism has a positioning mechanism that can be raised and lowered. 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. The positioning mechanism in the expanded state can evenly press against the inner wall of the sampling hole in the radial direction in 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 moving frames, the two moving frames are provided with two opposite supporting plates, and a group of telescopic clamping assemblies are respectively provided at both ends of the moving frames; the two symmetrically arranged supporting 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 drivingly connected to the bidirectional screw rod a. The bidirectional screw rod a is threadedly connected to 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 slidably 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 a plurality of groups of positioning components evenly distributed in a ring shape and an adjustment component for driving the plurality of groups of positioning components to move away or gather synchronously.

[0015] Furthermore, the adjustment component 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 meshingly connected to the gear a and coaxially arranged on the bidirectional screw rod b, two symmetrically distributed screw rod 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 which 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 which is rotatably connected to the other end on the same side of the two connecting rods. The tensioning rod is 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 knives 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 with the outer peripheral surface of the cylindrical rock core.

[0019] On the other hand, a repair method for a drilled plug-shaped sample core is also provided, using the above-mentioned repair device for a drilled plug-shaped sample core to repair the core after the drilled plug-shaped sample is drilled; 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, extends into the sampling hole of the core in a retracted state, and then changes from a retracted state to an extended state, so that the sampling hole is in a vertical state;

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

[0023] S4. Use a 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 a 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 core section where the sampling holes were originally located on the core was cut off, leaving two side core sections that did not contain the sampling holes. The two side core sections were first coated with adhesive and then pressed and bonded. The repaired product can be reused, and the waste of cores can be reduced to a smaller extent during the repair process.

[0027] 3. Make full use of the existing sampling holes on the core. During the cutting process, the retractable and expandable positioning mechanism is inserted into the sampling hole to achieve accurate positioning before the core is cut. After positioning, the positioning rod can 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 also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the 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 It is a schematic structural diagram 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 in an embodiment of the present invention;

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

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

[0034] Figure 5 A schematic diagram of the structure of a 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 It is a partial structural cross-sectional view of the dust collecting cotton in the embodiment of the present invention;

[0037] Figure 8 It is a schematic diagram of the structure of bonding two side sections tightly together in an embodiment of the present invention;

[0038] Fig. 9This is a schematic diagram of a cutting strike line parallel to the central axis of the core in an embodiment of the present invention;

[0039] Fig.10 It is a 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, tension 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-absorbing cotton; 34. Sliding rod; 35. Screw rod; 36. Connecting table; 37. Motor d. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] To facilitate the understanding of the embodiments of the present application, the following will be further explained with reference to the accompanying drawings, and the embodiments do not constitute a limitation on 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 a different order than described. For example, two continuously described processes may be performed substantially simultaneously or in an order opposite to the described order. In addition, the same reference numerals represent the same components.

[0043] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, 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, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, 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] Embodiment 1

[0045] After the plunger-shaped sample is drilled, a sampling hole 100 will remain 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, 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, and the positioning mechanism is located above the filling and fixing space, and the positioning mechanism is fixed to the filling and fixing space. 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 against the inner wall of the sampling hole 100 in the sampling hole 100 to make the sampling hole 100 vertical. 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. The cutting paths of the two cutting knives 25 are located on both sides of the sampling hole 100.

[0046] like Figure 1 , Fig. 9 and Fig.10 As shown, the dotted line in the figure is the cutting direction of the cutting knife. Figure 1 and Fig. 9 It shows that the cutting of the core is parallel to the center axis of the core. Fig.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 Figure 1 to Figure 2 The lifting and clamping assembly includes two symmetrically arranged moving frames 3, two opposite support plates 2 are provided on the two moving frames 3, and a group of telescopic clamping assemblies are provided at both ends of each moving frame 3. 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 arranged on the moving frame 3 and a clamping plate 7 arranged 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 clamping from both axial ends of the core 1. It can be understood that the space surrounded by multiple support plates 2 and multiple clamping plates 7 is the filling and fixing space of the lifting and clamping mechanism.

[0049] In one optional embodiment, the support plate 2 is a poorly curved plate, and the curved concave surface of the support plate 2 fits the outer circumference of the cylindrical core 1. Two support plates 2 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 moving frames 3 to move toward or away from each other, thereby driving the supporting plates 2 arranged in pairs to move closer to or away from each other, so as to achieve the lifting of the core 1 during the cutting process and to move the two side segment cores 101 toward each other and docking after cutting. Specifically, the adjustment component includes a fixed plate 10 arranged on the frame 11, a bidirectional screw a5 rotatably arranged on the fixed plate 10, and a motor a4 arranged on the fixed plate 10 and connected to the bidirectional screw a5. The bidirectional screw a5 is threadedly connected to the two moving frames 3 respectively, and the moving frames 3 are slidably arranged 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 moving 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 moving frames 3 are moved toward each other, so that the two side segment cores 101 move toward each other and dock.

[0051] In one of the optional embodiments, baffles a8 and baffles b9 are respectively arranged horizontally on the two moving frames 3, and the baffles a8 and baffles b9 are staggered up and down. After the middle section core 102 is cut off, the middle section core 102 falls onto the baffle b9 due to its own gravity, and the baffles a8 and baffles b9 play a supporting role, and can also block the dust generated during cutting, reducing the impact on the threaded connection between the bidirectional screw a5 and the moving frame 3.

[0052] In this embodiment, the hole position adjustment mechanism enables the core 1 to rotate to a state where the sampling hole 100 is vertically facing upward, and at the same time cooperates with the lifting and clamping mechanism to fix the core 1 in the filling and fixing space of the lifting and clamping mechanism, and cuts 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 arranged on the frame 11, a sliding frame 23 horizontally slidingly arranged on the guide rod 24, and a hydraulic cylinder b22 vertically arranged on the sliding frame 23. The positioning mechanism is arranged at the telescopic end of the hydraulic cylinder b22. 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 on the core 1. The positioning mechanism in the expanded state can radially and uniformly press against the inner wall of the sampling hole 100 in the sampling hole 100, so that the center line of the sampling hole 100 is in a vertical state. The positioning mechanism includes multiple groups of positioning components uniformly distributed in an annular shape and an adjustment component for driving the multiple groups of positioning components to move away or gather synchronously, and the contraction and expansion of the multiple groups of positioning components are realized by the adjustment component. Initially slide the sliding frame 23 to the position where the positioning mechanism faces the sampling hole 100 of the core 1, then extend the positioning mechanism in the retracted state downward into the sampling hole 100 through the hydraulic cylinder b22, and then move the multiple positioning components away through the adjustment component, so that the positioning mechanism is deployed in the sampling hole 100 and presses against the hole wall of the core of the sampling hole 100. During the deployment process of the positioning mechanism, the core 1 will rotate around the center line of the sampling hole 100, and the core 1 will rotate and contact with the support plate 2, so that the core 1 can rotate to the state where the sampling hole 100 is vertically facing upward. In this embodiment, the deployed state and retracted state of the positioning mechanism are the deployed state and retracted state of the multiple positioning components.

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

[0055] In one of the optional implementations, continue to refer to Figure 4The 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, and a connecting rod 161 is rotatably provided on the lifting column 21. A guide cylinder 162 is rotatably provided on one tensioning rod 16, and the guide cylinder 162 has a slideway for the connecting rod 161 to slide. When the bidirectional screw rod b12 rotates, the connecting rod 161 and the guide cylinder 162 can limit the two moving platforms 14 to move up and down, and multiple tensioning rods 16 will move horizontally in a vertical state, synchronously moving away or synchronously gathering. The tensioning rod 16 is tensioned on the inner wall of the sampling hole 100 of the core 1, and the core 1 is stretched to the state where the sampling hole 100 is vertically distributed.

[0056] In particular, four groups of positioning components can be provided, and the top ends of two tension rods 16 opposite to each other in the transverse direction are both connected with positioning rods 17. The two positioning rods 17 are located inside the two cutting knives 25. When the two tension rods 16 drive the two positioning rods 17 to move outward, the positioning rods 17 can indicate the position of the cutting knives 25. When the cutting knives 25 are attached to the positioning rods 17, the position of the cutting knives 25 is determined. If the cutting knives 25 cut the core 1 in the transverse direction at this position, the sampling holes 100 of the core 1 will be avoided, and the size of the cut middle core 102 will be smaller, resulting in less waste.

[0057] In this embodiment, the cutting mechanism further includes a power assembly for driving the two cutting knives 25 to rotate and a moving assembly for driving the power assembly to move horizontally; wherein the moving assembly is arranged on the frame 11. After the power assembly is started, the two cutting knives 25 rotate simultaneously, and the moving assembly drives the two high-speed rotating cutting knives 25 to move horizontally to cut the core 1. The cutting paths of the two cutting knives are respectively located on both sides of the sampling hole 100 of the core 1. The side segments 101 on both sides do not contain the sampling hole 100, and the cutting surface is a vertically distributed plane, which is convenient for subsequent pressurized bonding.

[0058] like Figure 5 and Figure 6As shown, the power assembly includes a mounting frame 29, a rotating shaft 26 rotatably arranged on the mounting frame 29, and a motor c30 arranged on the mounting frame 29 and drivingly connected to the rotating shaft 26. The outer peripheral surface of the rotating shaft 26 has a keyway, and a key 27 is arranged at the keyway. The motor c30 can drive the rotating shaft 26 to rotate. A knife shaft cylinder 251 is slidably arranged on the rotating shaft 26 and the key 27, and the rotating shaft 26 drives the knife shaft cylinder 251 to rotate through the key 27. The knife shaft cylinder 251 is connected to the cutting knife 25, and the knife shaft cylinder 251 is threadedly connected with a threaded knob 28 abutting on the key 27. The threaded knob 28 is used to determine the lateral position of the knife shaft cylinder 251, thereby determining the lateral position of the cutting knife 25, adjusting the cutting knife 25 to a position where the inner surface fits the positioning rod 17 and fixing it, and the parallel distance between the two cutting knives 25 can be adjusted, and the parallel distance between the two cutting knives 25 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 is moved away from the moving path of the cutting knife 25, which will not affect the cutting of the core 1 by the cutting knife 25.

[0059] In one optional embodiment, referring to Figure 1 The moving assembly includes a slide bar 34 arranged on the frame 11, a screw rod 35 rotatably arranged on the frame 11 and parallel to the slide bar 34, a motor d37 arranged on the frame 11 and drivingly connected to the screw rod 35, and two connecting platforms 36 arranged 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 to rotate forward and reverse, and the screw rod 35 drives the connecting platform 36 to move. The slide bar 34 plays a guiding role, and the connecting platform 36 can drive the mounting frame 29 to move, thereby realizing the movement of the cutting knife 25, and the core 1 is cut axially by the cutting knife 25.

[0060] It should be noted that Figure 1 to Figure 2 The lifting and clamping mechanism shown in the figure is suitable for cutting the core in a direction parallel to the central axis of the core. It can be understood that the lifting and clamping mechanism suitable for cutting the core in a direction perpendicular to the central axis of the core can be realized by those skilled in the art by adjusting the corresponding structure according to the inventive concept of the present application. For example, the lifting and clamping mechanism for cutting the core in a direction perpendicular to the central axis of the core can include four support plates 2, and two groups of support plates 2 respectively support the outer peripheral surfaces of the axial ends of the core 1, and the length of the support 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 arranged on the mounting frame 29, and a fan 31 and a ventilator 32 are respectively arranged on both sides of the ventilation channel. A plurality of dust-absorbing cottons 33 are arranged side by side on the inner side of the ventilator 32. The fan 31 blows air toward the ventilator 32, and the dust generated by cutting flows into the ventilator 32 under the action of negative air pressure and is absorbed by the dust-absorbing cotton 33. The filtered air is discharged from the exhaust hole at the outer end of the ventilator 32.

[0062] This embodiment also discloses a repair method for a drilled plug-shaped sample core, using the aforementioned repair device for a drilled plug-shaped sample core to repair the core 1 after the drilled plug-shaped sample, that is, to repair the core with 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, it is a manual visual adjustment, and the sampling holes 100 can only be basically adjusted to an 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, and then changes from the retracted state to the 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 faces the sampling hole 100 of the core 1 below, the hydraulic cylinder b22 drives the positioning mechanism to move 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 synchronously through the adjustment assembly. The multiple groups of positioning assemblies are tensioned 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, the core 1 is driven to roll on the supporting plate 2. After the multiple groups of positioning assemblies are fully tensioned, 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 the core is cut.

[0068] Specifically, four groups of telescopic clamping assemblies are respectively clamped at the two axial ends of the core 1, two groups 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 groups 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 two side segment cores 101;

[0069] S4. Use a cutting mechanism to cut the fixed core 1 to obtain a middle core section 102 and two side core sections 101. Paste the cut surfaces of the two side core sections 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 of the middle section 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 is 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 point can be as similar or similar as possible to the petrological properties of the original core;

[0071] In step S4, when the two side cores 101 are pasted, the two lifting and clamping components can be adjusted toward each other by adjusting the components until the two side cores 101 are pressed tightly together, and then pressed and fixed for a preset time, such as 2-3 hours, to obtain a repaired product. Finally, the repaired product can be released by the telescopic clamping component and removed.

[0072] It should be noted that between steps S3 and S4, the following steps may also be included: the positioning mechanism of the hole position adjustment mechanism is changed from an expanded state to a contracted state, and is raised to be moved out of the sampling hole 100 of the core 1, that is, multiple groups of positioning components are gathered together, and the positioning mechanism is driven to move upward by the hydraulic cylinder b22, and the positioning components are moved 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 holes on the cores 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 core waste 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 the present application in detail. It should be understood that the above description is only the specific implementation method of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A repair device for drilling plunger-shaped sample cores, characterized in that: It comprises a frame (11) and arranged on the frame (11): The lifting and clamping mechanism has a filling and fixing space, in which the rock core (1) to be repaired is installed, and the sampling hole (100) on the rock core (1) is directed upward and the rock core (1) is fixed; The hole position adjustment mechanism comprises a positioning mechanism that can be raised and lowered, the positioning mechanism being located above the filling fixed space, the positioning mechanism having a retracted state and an expanded state, the positioning mechanism in the retracted state being able to extend into the sampling hole (100), and the positioning mechanism in the expanded state being able to evenly press against the inner wall of the sampling hole (100) in the radial direction within the sampling hole (100), so that the sampling hole (100) is in a vertical state; The cutting mechanism comprises two coaxial and parallel arranged cutting knives (25), and 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 comprises 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 moving frames (3), the two moving frames (3) being provided with two opposite supporting plates (2), and a group of telescopic clamping assemblies being respectively provided at two ends of the moving frames (3); the two symmetrically arranged supporting plates (2) being configured to drag the core (1) from the outer circumferential surface of the core (1), and the telescopic clamping assemblies being 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 moving 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 4, characterized in that: The hole position adjustment mechanism comprises a guide rod (24) horizontally arranged on a 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), and the positioning mechanism comprises a plurality of positioning components evenly distributed in a ring shape and an adjustment component for driving the plurality of positioning components to synchronously move away or gather together.

6. The repair device for drilling plunger-shaped sample core according to claim 5, characterized in that: The adjustment assembly comprises a lifting column (21) vertically arranged at the telescopic end of a 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) meshingly connected to the gear a (19) and coaxially arranged on the bidirectional screw rod b (12), two symmetrically distributed screw rod nuts (13) both threadedly connected to the bidirectional screw rod b (12), and a moving platform (14) connected to the screw rod nut (13).

7. The repair device for drilling plunger-shaped sample core according to claim 6, characterized in that: The positioning assembly comprises two connecting rods (15) which are symmetrically distributed up and down and whose ends on the same side are rotatably connected to the two moving platforms (14) respectively, and a tensioning rod (16) which is rotatably connected to the other ends on the same side of the two connecting rods (15). The tensioning rod (16) is vertically distributed, and a connecting rod (161) is rotatably arranged on the lifting column (21). A guide cylinder (162) is rotatably arranged on one of the tensioning rods (16), and the guide cylinder (162) has a slideway for the connecting rod (161) to slide.

8. 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).

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

10. A method for repairing a drilled plunger sample core, characterized in that: Using the repairing device for drilling a plug-shaped sample core according to any one of claims 1 to 9 to repair the core (1) after drilling the plug-shaped sample; The repair method comprises the following steps: S1. Install the core (1) in the loading and fixing space of the lifting and clamping mechanism, and adjust the sampling hole (100) of the core (1) to be generally 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 extended 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 the core is cut; S4. Using a cutting mechanism to cut the fixed 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 core repair product.

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