Protective structure for preventing rock core from being scoured and dismounting device

Abstract

The utility model discloses an anti-rock core scour protection structure and a dismounting device, and relates to the technical field of rock core sampling, the anti-rock core scour protection structure comprises a core body, the core body is provided with a liquid passing channel communicated with a first end and a second end of the core body; the liquid passing channel at the second end is closer to the geometric center of the core body at the second end than at least part of the position of the outer edge of the second end. Water or cooling liquid and other liquid flows pass through the liquid flow channels and the gaps between the cylinders to reach the position of the drill bit, the rock core cannot be directly impacted, and therefore the integrity of the rock core is guaranteed to a certain degree.

Description

TECHNICAL FIELD

[0001] The utility model relates to core sampling technical field, especially a kind of anti-erosion protection structure and dismounting device of rock core. BACKGROUND

[0002] Drilling coring has very important significance in oil field and geothermal exploration development and engineering exploration design, and coring can lay foundation for correct understanding of stratum structure and finding and discovering oil field and geothermal, while various geotechnical mechanics tests also need to carry out drilling coring on site.However, a large number of mineral resources in China are distributed in fault zones and weak rock layers, and the rock mass of fault zones and weak rock layers is broken and has poor integrity, so the core integrity is poor when drilling coring, and the coring work is difficult.The existing drilling coring device is mostly single core barrel, and there is friction between the core barrel and the core during drilling, and the direct water flushing drilling method is used, so the core is eroded by water impact, which makes it difficult to ensure the core integrity during drilling coring, especially in broken rock layers, and the work efficiency is low.

[0003] The prior art does not consider the erosion and disturbance of water or cooling liquid to the core during drilling coring, and the extracted core is damaged to some extent, thereby affecting subsequent tests on the core.The existing coring device directly flushes water from top to bottom during drilling, and the core is directly eroded when flushing water from top to bottom.Because the core in loose rock layer is loose and easy to collapse, the core is easy to be eroded and collapsed after being impacted by water pressure from top to bottom, and it is difficult to extract. SUMMARY

[0004] Some simplification or omission may be made in this part and the abstract of the specification and the utility model name to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name, and such simplification or omission cannot be used to limit the scope of the utility model.

[0005] In view of the above technical problems of the prior art, the utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a drainage structure, which aims to solve how to avoid direct impact of liquid on the core and damage the core.

[0007] To solve the above technical problems, the utility model provides the following technical scheme: an anti-erosion protection structure for rock core, comprising a core body, a liquid passage is arranged on the core body and communicates with the first end and the second end of the core body.

[0008] The liquid passage is closer to the geometric center of the core body at the second end than at least part of the outer edge of the second end.

[0009] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: the second end surface of the core body is recessed and is provided with the avoiding groove that can be used to accommodate the rock core.

[0010] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: a plurality of liquid passing channels are arranged on the core body, and the liquid passing channels are not communicated with each other.

[0011] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: a plurality of liquid passing channels are arranged on the core body, and the liquid passing channels are not communicated with each other.

[0012] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: the core body forms the abutting block at other positions outside the liquid passing channel, and the abutting blocks are staggered.

[0013] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: the abutting block is provided with multiple layers, the spacing between each layer is greater than 0, and the two abutting blocks of adjacent layers are distributed in a staggered manner.

[0014] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: the first end is recessed and is provided with a water collecting groove, and the water collecting groove is communicated with the liquid passing channel.

[0015] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: the water collecting groove recessed in the first end is communicated with the liquid passing channel through a chute, the chute is one-to-one corresponding with the liquid passing channel, and the chutes are communicated with each other.

[0016] The protection structure of preventing rock core from washing has the beneficial effects that: the utility model discloses that water or cooling liquid and the like liquid flow reaches the drill bit position through the liquid flow channel and the interstice between the barrels, and does not directly impact the rock core, thereby guaranteeing the integrity of the rock core to a certain extent.

[0017] Another object of the utility model is to provide a protection device, which aims to solve how to quickly disassemble and facilitate subsequent rock core extraction.

[0018] To solve the above technical problems, the utility model also provides the following technical scheme: a dismounting device, which comprises a protection structure of preventing rock core from washing, and a coring barrel sleeved on the outer wall of the core body.

[0019] As a preferred scheme of the utility model discloses the protection structure of preventing rock core from washing, wherein: the first end is recessed and is provided with a water collecting groove, and the water collecting groove is communicated with the liquid passing channel.

[0020] The dismounting device has the beneficial effects that: the opening radius of the rock core barrel is improved, the main body is convenient to take and place, and subsequent rock core extraction is guaranteed. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 These are the top view and sectional view of the core in this utility model.

[0023] Figure 2 In this utility model Figure 1 The diagram shows the liquid motion process of the structure shown.

[0024] Figure 3 These are the top view and sectional view of the core in this utility model.

[0025] Figure 4 In this utility model Figure 3 The diagram shows the liquid motion process of the structure shown.

[0026] Figure 5 These are the top view and sectional view of the core in this utility model.

[0027] Figure 6 In this utility model Figure 5 The diagram shows the liquid motion process of the structure shown.

[0028] Figure 7 This is a side view of the core in this utility model.

[0029] Figure 8 In this utility model Figure 7 The diagram shows the liquid motion process of the structure shown.

[0030] Figure 9 These are the top view and sectional view of the core in this utility model.

[0031] Figure 10 In this utility model Figure 9 The diagram shows the liquid motion process of the structure shown.

[0032] Figure 11 These are the top view and sectional view of the core in this utility model.

[0033] Figure 12 In this utility model Figure 11 The diagram shows the liquid motion process of the structure shown. Detailed Implementation

[0034] In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0036] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor does it mean an embodiment that is separate or selectively excluded from other embodiments.

[0037] Embodiment 1

[0038] Reference Figures 1-4 For the first embodiment of the present application, the embodiment provides a rock core erosion protection structure, which comprises a core body 100, and a liquid passage 103 is arranged on the core body 100 and communicates the first end 101 and the second end 102 of the core body 100.

[0039] The liquid passage 103 is closer to the geometric center of the core body 100 at the second end 102 than at least part of the outer edge of the second end 102.

[0040] Wherein, the first end 101 and the second end 102 are distributed at both ends of the core body 100, and the liquid passage 103 penetrates the core body 100 from the first end 101 to the second end 102; at the same time, the first end 101 is upward during use, and the second end 102 is the opposite side of the first end 101 and is downward. The liquid passage 103 can be a straight passage or a curved passage, as long as it can ensure that the liquid passage 103 penetrates the core body 100 from the first end 101 to the second end 102.

[0041] The outlet of the liquid passage 103 at the second end 102 is distributed away from the geometric center of the second end 102, which mainly serves to ensure that the cooling liquid inside the liquid passage 103 can be as close as possible to the outer wall of the core body 100 when it comes out of the second end 102, preventing the cooling liquid from directly impacting the upper surface of the rock core, thereby further ensuring the integrity of the rock core and the accuracy of the subsequent detection data of the rock core.

[0042] In summary, the prior art does not consider the scouring and disturbing effect of water or cooling liquid on the core during the coring process, and the extracted core will be damaged to some extent, thereby affecting the subsequent tests carried out on the core. Therefore, during the process of taking the core, a core body 100 is arranged above the core, and the core body 100 can be placed in the inner wall of the coring barrel of the prior art, and the coring barrel is the prior art and will not be described again; when the cooling liquid falls from above, the cooling liquid will first reach the first end 101 of the core body 100, at this time, the falling speed of the cooling liquid is buffered, and then the cooling liquid flows along the liquid passage 103 to the second end 102, and since the outlet is close to the outer surface of the core body 100, the cooling liquid will not directly impact the upper surface and outer wall of the core. In this process, the core body 100 can slow down the falling speed of the cooling liquid and avoid direct impact of the cooling liquid on the core, thereby ensuring the integrity of the core and the accuracy of the subsequent detection data.

[0043] Embodiment 2

[0044] Reference Figures 5-8 For the second embodiment of the utility model, a plurality of liquid passages 103 are arranged on the core body 100, and the liquid passages 103 are not connected to each other.

[0045] Among them, as shown in Figure 5 and Figure 6 , the core body 100 adopts a cylindrical structure, the liquid passage 103 can be arranged in a circumferential array on the outer surface of the core body 100, and the liquid passage 103 extends to the surface of the first end 101; that is, the liquid passage 103 covers other surfaces except the second end 102; through the circumferential array liquid passage 103, the cooling liquid can be uniformly flowed to the four corners as much as possible, and at the same time, the cooling liquid can flow along the outer wall.

[0046] Preferably, a plurality of liquid passages 103 are arranged on the core body 100, and at least part of the sections between the liquid passages 103 are connected to each other.

[0047] Among them, the plurality of liquid passages 103 can share an inlet of a first end 101, or the liquid passages 103 of a plurality of first ends 101, and share an outlet of a second end 102.

[0048] The core body 100 forms a resisting block 104 at other positions outside the liquid passage 103, and the resisting blocks 104 are staggered.

[0049] Among them, the two liquid passages 103 can be combined at the inlet, then bifurcate, then combine; the bifurcations form the resisting block 104, as shown in Figure 7 and Figure 8The formed resistance blocks 104 are arranged in at least a circumferential array of two, and the outer wall of the resistance blocks 104 has a height difference with the bottom of the liquid passage 103. The advantage of this design is that the core body 100 can be directly installed into the inner wall of the drill cylinder of the prior art by using the friction force, and the liquid passage 103 penetrates the core body 100, so that the cooling liquid falling from the top of the core can be intercepted, and the cooling liquid can be guided to the surrounding by the liquid passage 103. Because of the resistance blocks 104, the cooling liquid flows to the surface of the resistance blocks 104, and then is divided, continues to converge, and continues to be divided, so as to achieve the effect of slowing down the water flow, which can avoid the falling speed of the water flow and guide the water flow to the surrounding, so as to ensure that the water flow is not too fast to flush the core.

[0050] Preferably, the resistance blocks 104 are provided with multiple layers, and the spacing between each layer is greater than 0; and the two resistance blocks 104 of adjacent layers are distributed in a staggered manner.

[0051] The resistance blocks 104 formed between the liquid passages 103 are circumferentially arranged in multiple layers, the gap between each layer of resistance blocks 104 is greater than 0; and each layer of resistance blocks 104 is distributed in a staggered manner. For example, one of the resistance blocks 104 of the first layer, the liquid passage 103 between the two resistance blocks 104 of the second layer is directly below one of the resistance blocks 104 of the first layer, and the cross section is smaller than the cross section of the upper surface of the resistance block 104. The advantage of this design is that the cooling liquid starts to slide from the upper end of the liquid passage 103, then slides to the upper surface of the resistance block 104, then starts to divide, and after the division, contacts the upper surface of the next layer of resistance blocks 104, then continues to divide, and after the division, converges on the upper surface of the next resistance block 104, thereby achieving the effect of slowing down the flow.

[0052] The surface of the second end 102 of the core body 100 is concave and provided with a relief groove 100a for accommodating the core.

[0053] The surface of the second end 102 of the core body 100 is concave and provided with a cylindrical groove, that is, the lower surface of the core body 100 is provided with a cylindrical relief groove 100a. When drilling the core downward, the cooling liquid flows downward along the liquid passage 103 of the outer wall of the core body 100.

[0054] In summary, the prior art does not consider the scouring and disturbance of water or cooling liquid to the core during the coring process, and the extracted core will be damaged to some extent, thereby affecting subsequent tests on the core. When the core is drilled, the cooling liquid falls from above and falls on the first end 101 of the core body 100, and then flows along the inner wall of the liquid passage 103 to the second end 102. During this process, the lubricating liquid flows along the outer wall of the contact block 104, and then the lubricating liquid is divided into two parts, and the divided lubricating liquid is collected along one of the inner walls of the liquid passage 103, and then flows to the outer wall of the next contact block 104. In this way, the falling speed of the lubricating liquid is slowed down, and the damage to the core caused by the high flow rate is avoided as much as possible; at the same time, the array of liquid passages 103 is arranged on the outer wall of the core body 100, so that the lubricating liquid flows along the outer wall of the core body 100, avoiding direct impact on the core body 100, and ensuring that the core after the core body is extracted will not affect the subsequent test data.

[0055] Embodiment 3

[0056] Reference Figures 9-12 For the third embodiment of the utility model, the embodiment further provides a dismounting device. The dismounting device comprises a first end 101, wherein a water collecting groove 101a is recessed in the first end 101, and the water collecting groove 101a is in communication with the liquid passage 103.

[0057] The liquid passage 103 is arranged in a circumferential array on the outer surface of the core body 100; a circular water collecting groove 101a is recessed in the upper surface of the core body 100, that is, the surface of the first end 101, the liquid passage 103 is in communication with the inside of the water collecting groove 101a, and the communication position is at the upper opening of the water collecting groove 101a. The advantage of this design is that when the lubricating liquid falls, the lubricating liquid starts to accumulate from the bottom of the water collecting groove 101a, and then starts to flow into the liquid passage 103. In this way, the water flow can not directly flow through the liquid passage 103 at the beginning, and the initial speed of the liquid flowing into the liquid passage 103 is reduced.

[0058] The water collecting groove 101a recessed in the first end 101 is in communication with the liquid passage 103 through a chute 101b, and the chute 101b corresponds to the liquid passage 103 one by one; and the chutes 101b are in communication with each other.

[0059] The chute 101b is recessed in the surface of the first end 101, the chute 101b corresponds to the liquid passage 103 one by one, and the bottom of the chute 101b has a height difference with the bottom of the water collecting groove 101a. The advantage of this design is that the lubricating liquid can first flow into the inside of the water collecting groove 101a, and then flow into the liquid passage 103 through the chute 101b, thereby ensuring that the water flow flowing downward along the liquid passage 103 has a smaller speed.

[0060] In summary, in order to alleviate the water flow, a water collecting groove 101b is made on the upper surface of the core body 100, so that the lubricating liquid first flows into the water collecting groove 101a, preventing the lubricating liquid from directly flowing along the liquid passage 103 to the lower part, and then the lubricating liquid continuously accumulates in the water collecting groove 101b, and then starts to flow along the chute 101b into the liquid passage 103.

[0061] Embodiment 4

[0062] Referring to Figures 1-12 For the fourth embodiment of the utility model, the embodiment further provides a dismounting device. The dismounting device comprises a core taking barrel 200 which is sleeved on the outer wall of the core body 100.

[0063] Among them, the core taking barrel 200 replaces the original core barrel, and the difference lies in that the upper opening diameter of the core taking barrel 200 is the same as the inner diameter, so that the core body 100 can be directly taken out from the upper part by the mechanical arm, and then the core is taken out; the core body 100 is taken out to ensure that the core can be smoothly flushed out.

[0064] The inner wall of the core taking barrel 200 is attached to the outer wall of the abutting block 104.

[0065] The outer wall of the abutting block 104 is made into a curved surface, and the radius of the curved surface is the same as the inner diameter of the core taking barrel 200, so as to ensure the friction force of the contact surface and ensure that the core body 100 will not slip off during use.

[0066] The inner diameter of the opening of the core taking barrel 200 is the same as the outer diameter of the abutting block 104

[0067] Among them, the core taking barrel 200 is a cylindrical structure with two open ends, and the inner diameter of the core taking barrel 200 is the same as the radius of the outer wall of the abutting block 104, so as to install the core body 100 on the inner wall of the core taking barrel 200 by using the friction force, and the liquid passage 103 also has an effect here, that is, when the core body 100 is installed or dismounted, the mechanical arm claw of the existing technology can be inserted into the inner wall of the liquid passage 103 to clamp the core body 100, and then the core body 100 is inserted into the core taking barrel 200, and then the lubricating liquid falls from the upper part, and then the lubricating liquid falls on the upper surface of the core body 100, and then moves to the surrounding along the liquid passage 103, and then flows through the abutting block 104, and then the lubricating liquid flows downward along the inner wall of the core taking barrel 200, avoiding direct impact on the surface of the rock mass, and ensuring the integrity of the rock mass; at the same time, after the core taking is completed, the core body 100 can be taken out by the mechanical arm, which is convenient for subsequent taking out of the core.

[0068] In summary, when in use, the core body 100 is inserted into the inside of the core taking barrel 200, and then plays a role of buffering and shunting the drilling fluid; after the core taking is completed, the core body 100 is taken out, which is convenient for subsequent taking out of the core.

[0069] It is important to note that the construction and arrangements of the application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the novel teachings and advantages of the subject matter described herein (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.). For example, the elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be modified or changed. Accordingly, all such modifications are intended to be included within the scope of the present inventive subject matter. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the subject matter described herein. Any "device" or "apparatus" blocks in the claims are intended to cover the structures described herein and equivalents thereof, and also cover structures or that are not structurally equivalent to the structures described herein. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventive subject matter. Accordingly, the present inventive subject matter is not limited to the particular embodiments described herein, but includes all such modifications, changes, substitutions, improvements, suggestions and enhancements that do not depart from the spirit and scope of the present inventive subject matter. All such substitutions, modifications, changes and omissions therefore are meant to be encompassed by the appended claims.

[0070] Further, in order to provide a concise description of exemplary embodiments, not all features of an actual implementation can be described (that is, those not pertinent to the best mode for carrying out the present inventive subject matter, or those not necessary for enabling one to practice the present inventive subject matter).

[0071] It is to be understood that the development process can involve various steps that need not be performed in any particular order or according to any pre-determined pattern, unless otherwise indicated or unless it would be obvious from a consideration of the foregoing description, that indeed, some sequences or patterns of acts are preferably or more advantageously implemented. Moreover, in some instances, aspects of the inventive subject matter can include advantages other than those described herein which can be readily observed by persons skilled in the relevant arts (e.g., through performance of an act of insufficiency).

[0072] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and all these modifications should be included in the scope of the claims of the present application.

Claims

1. A core washout protection structure, characterized by: The application relates to a protection structure for preventing rock core from being washed away, which comprises a core body (100) provided with a liquid-passing channel (103) connecting a first end (101) and a second end (102) of the core body (100). The liquid-passing channel (103) is closer to the geometric center of the core body (100) at the second end (102) than to at least part of the outer edge of the second end (102). The second end (102) of the core body (100) is concave and provided with a avoiding groove (100a) for accommodating the rock core. The core body (100) is provided with a plurality of liquid-passing channels (103), and the liquid-passing channels (103) are not communicated with each other.

2. The erosion protection structure of claim 1, wherein: The core body (100) is provided with a plurality of liquid-passing channels (103), and at least part of the liquid-passing channels (103) are communicated with each other.

3. The erosion protection structure of claim 1, wherein: The core body (100) is provided with a plurality of resisting blocks (104) at positions other than the liquid-passing channels (103).

4. A core washout protection structure as claimed in claim 2 or 3, characterised in that: The resisting blocks (104) are provided with a plurality of layers, and the distance between the layers is greater than 0; and the resisting blocks (104) of adjacent layers are staggered.

5. The erosion protection structure of claim 4, wherein: The first end (101) is concave and provided with a water collecting groove (101a) communicated with the liquid-passing channel (103).

6. The erosion protection structure according to claim 2 or 3, wherein: The water collecting groove (101a) of the first end (101) is communicated with the liquid-passing channel (103) through a chute (101b), the chute (101b) is one-to-one corresponding to the liquid-passing channel (103), and the chutes (101b) are communicated with each other.

7. The erosion protection structure of claim 6, wherein: The application further relates to a coring barrel (200) sleeved on the outer wall of the core body (100).

8. A dismounting device, characterized in that: The inner diameter of the opening of the coring barrel (200) is the same as the outer diameter of the resisting block (104).

9. The disassembly apparatus of claim 8, wherein: ​

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