A coring structure and a coring drill tool

Abstract

The present application relates to the field of drilling and exploration technology, and specifically to a coring structure and a coring drill. Among them, the coring structure includes a collecting tube, a stopper and a propping member; the collecting tube has a collecting through hole; the stopper is located in the collecting through hole and has a first end and a second end, the first end is connected to the collecting tube, and the second end is arranged away from the hole wall of the collecting through hole relative to the first end; the propping member can extend into the collecting tube and apply a force to the stopper so that the second end can elastically rotate relative to the first end toward the hole wall close to the collecting through hole. The present application has a simple structure, can reduce the core slipping out during the extraction of the collecting tube, and ensure the core recovery rate.

Description

Technical Field

[0001] The present application relates to the field of drilling and exploration technology, and in particular to a coring structure and a coring drill tool. Background Art

[0002] During the drilling process with a small-diameter diamond drill bit, the core passes through the drill bit and enters the core collection structure. However, when encountering loose formations, the core is relatively small. When extracting the core collection structure, the core is easy to slip out of the core collection structure, resulting in a decrease in the core recovery rate. Utility Model Content

[0003] The present application provides a coring structure and a coring drill. When extracting a collection tube, a stopper is used to block the core in the collection tube, thereby reducing the amount of core sliding out to solve the problem of reduced core recovery rate when the existing diamond drill bit encounters loose formations.

[0004] This application is implemented through the following technical solutions:

[0005] In a first aspect, the present application provides a coring structure, comprising:

[0006] A collecting cylinder, wherein the collecting cylinder has a collecting through hole;

[0007] A stopper, the stopper is located in the collecting through hole and has a first end and a second end, the first end is connected to the collecting cylinder, and the second end is arranged relative to the first end and away from the hole wall of the collecting through hole;

[0008] The support member can extend into the collecting tube and exert a force on the stop member so that the second end can elastically rotate relative to the first end toward the hole wall close to the collecting through hole.

[0009] The coring structure provided in the present application is characterized in that the expansion member can exert a force on the stop member so that the second end of the stop member can elastically rotate relative to the first end, so that the core can smoothly enter the collecting tube and be collected. When the collecting tube is extracted, the stop member can be separated from the expansion member. After the expansion member withdraws the force exerted on the stop member, the second end of the stop member can elastically rotate relative to the first end under the elastic action to return to the initial position, so that the stop member can form a barrier to the core in the collecting tube, the amount of core sliding out is reduced, and the core recovery rate is guaranteed.

[0010] In some optional embodiments, the retaining member is elastically deformed to enable the second end to elastically rotate relative to the first end.

[0011] In some optional embodiments, the retaining member is configured as an arc-shaped spring piece.

[0012] In some optional embodiments, the number of the retaining members is configured to be multiple, wherein the second ends of the retaining members are arranged around the axis of the collecting through hole.

[0013] In some optional embodiments, the second ends are evenly distributed around the axis of the collecting through hole.

[0014] In some optional embodiments, the retaining member is connected to the collecting barrel via an annular mounting seat, wherein the annular mounting seat is connected to the end surface of the collecting barrel.

[0015] In some optional embodiments, the collecting cylinder is configured as a cylindrical shape, wherein the annular mounting seat is configured as a circular ring shape adapted to the end surface of the collecting cylinder.

[0016] In some optional embodiments, the expansion member includes:

[0017] a first ring body, the first ring body being capable of extending into the collecting through hole and contacting the stop member to apply a force to the stop member;

[0018] A second ring body, wherein the axial end face of the second ring body is connected to the first ring body and is coaxially arranged with the second ring body, wherein when the first ring body extends into the collecting through hole, the end face of the second ring body can fit with the end face of the collecting barrel.

[0019] In some optional embodiments, the end of the first ring body away from the second ring body is configured as a rounded structure.

[0020] In a second aspect, the present application provides a coring drill, characterized in that it comprises:

[0021] a drill bit having a stepped through hole;

[0022] A thick diameter, the thick diameter is sleeved on the drill bit and the drill bit can rotate relative to the thick diameter;

[0023] Any coring structure as described in the first aspect;

[0024] Wherein, the expansion member is connected to the stepped end surface of the stepped through hole, and the collecting tube is connected to the thick diameter.

[0025] The coring drill provided by the present application has a drill bit that can rotate relative to the coarse diameter, and the drill bit can achieve drilling under the power provided by the driving device; after the expansion member and the collecting tube are respectively installed in the drill bit and on the coarse diameter, the expansion member applies a force to the stop member in the collecting tube to make the second end of the stop member elastically rotate relative to the first end, and when encountering loose formations, the core enters the collecting tube after passing through the stepped through hole. When the amount of core in the collecting tube reaches the requirement, the collecting tube is extracted, and the expansion member and the stop member react against each other. The stop member returns to its original state under the action of elasticity to form a barrier to the core in the collecting tube, reducing the amount of core sliding out of the collecting tube, thereby ensuring the core recovery rate of the coring drill.

[0026] Compared with the prior art, this application has the following advantages and beneficial effects:

[0027] 1. In the coring structure provided in the present application, the expansion member can exert a force on the stop member so that the second end of the stop member can elastically rotate relative to the first end, so that the core can smoothly enter the collecting tube and be collected. When the collecting tube is extracted, the stop member can be separated from the expansion member. After the expansion member cancels the force exerted on the stop member, the second end of the stop member can elastically rotate relative to the first end under the action of elasticity to return to the initial position, so that the stop member can form a barrier to the core in the collecting tube, the amount of core sliding out is reduced, and the core recovery rate is guaranteed.

[0028] 2. The core drilling tool provided in the present application has a drill bit that can rotate relative to the coarse diameter, and the drill bit can achieve drilling under the power provided by the driving device; after the expansion member and the collecting tube are respectively installed in the drill bit and on the coarse diameter, the expansion member applies a force to the stop member in the collecting tube so that the second end of the stop member elastically rotates relative to the first end. When encountering loose formations, the core enters the collecting tube after passing through the stepped through hole. When the amount of core in the collecting tube reaches the requirement, the collecting tube is extracted, and the expansion member and the stop member react against each other. The stop member returns to its original state under the action of elasticity to form a barrier to the core in the collecting tube, thereby reducing the amount of core sliding out of the collecting tube, thereby ensuring the core recovery rate of the core drilling tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:

[0030] Figure 1 A schematic diagram of a coring structure provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the support structure provided in the embodiment of the present application;

[0032] Figure 3 This is a partial structural schematic diagram of the coring drill provided in an embodiment of the present application.

[0033] Marks and corresponding parts names in the attached drawings:

[0034] 1-collecting tube, 2-stopping member, 3-opening member, 31-first ring body, 32-second ring body, 4-annular mounting seat, 5-drill bit. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with examples and drawings. The illustrative implementation scheme of the present application and its description are only used to explain the present application and are not intended to limit the present application.

[0036] First, as Figure 1-Figure 3 As shown, an embodiment of the present application provides a coring structure, which includes a collecting tube 1, a stopper 2 and a propping member 3.

[0037] The external shape of the collecting tube 1 may not be limited. For example, the cross-sectional shape of the collecting tube 1 may be square, triangular, diamond, star-shaped, etc. The inner hole of the collecting tube 1 may be used as a collecting through hole. In actual implementation, the inner hole of the collecting tube 1 may also be expanded to form a collecting through hole.

[0038] The stop member 2 is located in the collecting hole and has a first end and a second end. In actual implementation, the stop member 2 can be constructed as a sheet or rod-shaped member with a certain length to reduce the space occupied in the collecting hole. The first end is connected to the collecting cylinder 1, and the second end is arranged away from the hole wall of the collecting hole relative to the first end. That is to say, in the axial perspective of the collecting cylinder 1, there is a distance between the second end and the hole wall of the collecting hole. In this perspective, the line connecting the second end and the first end is perpendicular to the axis of the collecting cylinder 1.

[0039] The support member 3 can extend into the collecting tube 1 and exert a force on the stop member 2 so that the second end can elastically rotate relative to the first end toward the hole wall close to the collecting through hole, wherein the elastic rotation refers to the second end rotating around the second end under the condition of overcoming the elastic effect.

[0040] In the coring structure provided in the present application, the expansion member 3 can exert a force on the stop member 2 to make the second end of the stop member 2 elastically rotate relative to the first end, so that the core can smoothly enter the collecting tube 1 and be collected. When the collecting tube 1 is extracted, the stop member 2 can be separated from the expansion member 3. After the expansion member 3 withdraws the force on the stop member 2, the second end of the stop member 2 can elastically rotate relative to the first end under the elastic action to return to the initial position, so that the stop member 2 can form a barrier to the core in the collecting tube 1, the amount of core sliding out is reduced, and the core recovery rate is guaranteed.

[0041] The stopper 2 can be elastically rotatably connected to the collection tube 1 so that the second end can be elastically rotated relative to the first end, or can be elastically deformed to enable the second end to be elastically rotated relative to the first end. In order to simplify the structure and reduce the space occupied in the collection tube 1, in some optional embodiments, the stopper 2 is elastically deformed to enable the second end to be elastically rotated relative to the first end. In actual implementation, the stopper 2 can be constructed as a spring sheet, wherein one end of the stopper 2 in the length direction is connected to one end of the collection tube 1, and the other end is located in the collection through hole, and there is a distance between the stopper 2 and the collection tube 1, wherein the second end is closer to the axis of the collection through hole than the first end, and the opening member 3 contacts the middle part of the stopper 2 to apply a force to the stopper 2, and the second end overcomes the elastic force formed by the elastic deformation of the stopper 2 itself and rotates relative to the first end, that is, after the opening member 3 pushes the stopper 2, the core can enter the collection tube 1.

[0042] Preferably, the retaining member 2 is configured as an arc-shaped spring sheet, wherein the second end of the retaining member 2 is bent toward the axis of the collecting through hole.

[0043] In order to make the stopper 2 have a better blocking effect on the core, in some optional embodiments, the number of the stopper 2 is configured to be multiple, wherein the second ends of the stopper 2 are arranged around the axis of the collection through hole. In actual implementation, the second ends are evenly distributed around the axis of the collection through hole, that is, the multiple stoppers 2 can be evenly distributed around the circumference.

[0044] In some optional embodiments, the retaining member 2 is connected to the collecting cylinder 1 via an annular mounting seat 4 , wherein the annular mounting seat 4 is connected to the end surface of the collecting cylinder 1 .

[0045] In the embodiment of the present application, when the number of the stop members 2 is configured as multiple, if the stop members 2 are directly connected to the collecting cylinder 1, since the stop members 2 are located inside the collecting cylinder 1, it is not easy to ensure the connection accuracy between the stop members 2 and the collecting cylinder 1 during the connection process. After connecting multiple stop members 2 to the annular mounting seat 4, and then connecting the mounting seat to the end face of the collecting cylinder 1, the position of the stop members 2 in the collecting through hole can be relatively accurate. At the same time, compared with directly connecting the stop members 2 to the collecting cylinder 1, it is more convenient to implement using the mounting seat.

[0046] In some optional embodiments, the collecting barrel 1 is constructed into a cylindrical shape, so that the collecting barrel 1 can be more conveniently fitted into the drilling tool, wherein the annular mounting seat 4 is constructed into a circular ring shape that matches the end face of the collecting barrel 1. In actual implementation, the outer diameter of the annular mounting seat 4 is equal to the outer diameter of the collecting barrel 1, and the inner diameter of the annular mounting seat 4 is slightly smaller than the inner diameter of the collecting barrel 1.

[0047] In some optional embodiments, when multiple stop members 2 are evenly distributed around the circumference of the axis of the collecting hole, the propping member 3 may include a first ring body 31 and a second ring body 32; the first ring body 31 can extend into the collecting hole to contact the multiple stop members 2 at the same time to apply force to the multiple stop members 2, and the multiple stop members 2 undergo elastic deformation respectively, and the second ends of the multiple stop members 2 are away from each other to prevent the second ends from forming an obstruction to the core; the axial end face of the second ring body 32 is connected to the first ring body 31 and is coaxially arranged with the second ring body 32, wherein, when the first ring body 31 extends into the collecting hole, the end face of the second ring body 32 can fit with the end face of the collecting tube 1, and in actual implementation, the outer diameter of the first ring body 31 is smaller than the outer diameter of the first ring body 31, and the inner diameter of the first ring body 31 is equal to the inner diameter of the second ring body 32.

[0048] Since the end of the first ring body 31 is in direct contact with the retaining member 2 , in order to reduce wear, in some optional embodiments, the end of the first ring body 31 away from the second ring body 32 is constructed as a rounded structure.

[0049] Second, see Figure 3 The embodiment of the present application provides a coring drill tool, which includes a drill bit 5, a coarse diameter (not shown in the figure) and any coring structure as in the first aspect; the drill bit 5 has a stepped through hole, and the stepped through hole is used for the core to pass through; the coarse diameter is sleeved on the drill bit 5 and the drill bit 5 can rotate relative to the coarse diameter; wherein the expansion piece 3 is connected to the stepped end face of the stepped through hole, and the collecting tube 1 is connected to the coarse diameter.

[0050] The coring drill provided in the present application has a drill bit 5 that can rotate relative to the coarse diameter, and under the power provided by the driving device, the drill bit 5 can achieve drilling; after the expansion member 3 and the collecting tube 1 are respectively installed in the drill bit 5 and on the coarse diameter, the expansion member 3 applies a force to the stop member 2 in the collecting tube 1 to make the second end of the stop member 2 elastically rotate relative to the first end. When encountering loose formations, the core enters the collecting tube 1 after passing through the stepped through hole. When the amount of core in the collecting tube 1 reaches the requirement, the collecting tube 1 is extracted, and the expansion member 3 and the stop member 2 react against each other. The stop member 2 returns to its original state under the action of elasticity to form a barrier to the core in the collecting tube 1, reducing the amount of core sliding out of the collecting tube 1, thereby ensuring the core recovery rate of the coring drill.

[0051] The above specific embodiments illustrate the implementation methods of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation methods. On the contrary, the purpose of introducing the application in conjunction with the implementation methods is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the above description contains many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0052] It should be noted that in this specification, similar numbers and letters represent similar items in the above drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of this application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A coring structure, characterized in that: include: A collecting cylinder (1), wherein the collecting cylinder (1) has a collecting through hole; a stopper (2), the stopper (2) being located in the collecting through hole and having a first end and a second end, the first end being connected to the collecting cylinder (1), and the second end being arranged away from the hole wall of the collecting through hole relative to the first end; A support member (3) is capable of extending into the collecting tube (1) and exerting a force on the stop member (2) so that the second end can elastically rotate relative to the first end toward a hole wall close to the collecting through hole.

2. The coring structure according to claim 1, characterized in that: The retaining member (2) is elastically deformed so that the second end can elastically rotate relative to the first end.

3. The coring structure according to claim 2, characterized in that: The retaining member (2) is configured as an arc-shaped spring sheet.

4. The coring structure according to any one of claims 1 to 3, characterized in that: The number of the retaining members (2) is configured to be multiple, wherein the second ends of the retaining members (2) are arranged around the axis of the collecting through hole.

5. The coring structure according to claim 4, characterized in that: The second ends are evenly distributed around the axis of the collecting through hole.

6. The coring structure according to claim 4, characterized in that: The retaining member (2) is connected to the collecting tube (1) via an annular mounting seat (4), wherein the annular mounting seat (4) is connected to the end surface of the collecting tube (1).

7. The coring structure according to claim 6, characterized in that: The collecting cylinder (1) is constructed in a cylindrical shape, wherein the annular mounting seat (4) is constructed in a circular ring shape adapted to the end surface of the collecting cylinder (1).

8. The coring structure according to claim 4, characterized in that: The expansion member (3) comprises: a first ring body (31), the first ring body (31) being capable of extending into the collecting through hole and contacting the stop member (2) to apply a force to the stop member (2); A second ring body (32), wherein the axial end face of the second ring body (32) is connected to the first ring body (31) and is coaxially arranged with the second ring body (32), wherein when the first ring body (31) extends into the collecting through hole, the end face of the second ring body (32) can fit with the end face of the collecting barrel (1).

9. The coring structure according to claim 8, characterized in that: The end of the first ring body (31) away from the second ring body (32) is configured as a rounded structure.

10. A coring drill, characterized in that: include: A drill bit (5), wherein the drill bit (5) has a stepped through hole; A thick diameter, the thick diameter being sleeved on the drill bit (5) and the drill bit (5) being rotatable relative to the thick diameter; The coring structure according to any one of claims 1 to 9; in, The expansion member (3) is connected to the stepped end surface of the stepped through hole, and the collecting cylinder (1) is connected to the thick diameter.

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