Supporting plate assembly, anti-rotation supporting device and directional coring drilling tool

Abstract

The utility model discloses a support plate assembly, anti-rotation support device and directional coring drilling tool, the support plate assembly is suitable for anti-rotation support device, the support plate assembly comprises a plate body and ribs, the plate body is provided with a front cambered surface and a rear cambered surface which are distributed along the thickness direction, and the front cambered surface and the rear cambered surface are both bent towards the same side of the thickness direction. The rib is arranged on the front arc face and extends in the length direction of the plate body, and a narrow blade is formed at the end, away from the plate body, of the rib. According to the supporting plate assembly, the anti-rotation supporting device and the directional coring drilling tool, the ribs are not prone to being abraded, the service life is long, and the resistance is small when the anti-rotation supporting device moves in the axial direction.

Description

Technical Field

[0001] The utility model relates to the technical field of directional coring drilling geological exploration, in particular, to an anti-rotation support device, a support plate assembly suitable for the anti-rotation support device, and a directional coring drill with the anti-rotation support device. Background Art

[0002] Existing directional coring drilling technology usually adopts a directional structure, that is, the offset mechanism directly or indirectly offsets the main shaft connected to the drill bit to bend it so that the drill bit points to the direction of the drilling trajectory control. The main shaft is a hollow structure that allows cores and water to pass through. During the drilling process, the main shaft drives the drill bit to rotate when it is bent. In order to ensure that the directional drilling direction remains unchanged, the bending direction of the main shaft is required to remain unchanged, that is, the offset mechanism or the parts fixedly connected to it are required to have an anti-rotation function.

[0003] The anti-rotation device generally plays an anti-rotation function by interacting with the inner wall of the borehole, which requires a large circumferential rotation resistance. At the same time, the anti-rotation device needs to be pushed forward in the borehole along with the drill bit during the drilling process, which requires a small axial propulsion resistance. If the friction between the anti-rotation device and the inner wall of the borehole is increased or decreased alone, the circumferential rotation resistance and axial propulsion resistance of the anti-rotation device will increase or decrease synchronously, and the ideal effect cannot be achieved. The anti-rotation structure needs to be specially designed.

[0004] Invention patent CN202210498727.1 discloses an anti-rotation support device and a directional coring drill, which is provided with a radially movable support body and a tip, so that when the support body moves radially outward, the tip can penetrate radially into the hole wall, thereby achieving an anti-rotation effect. However, because the tip needs to slide along the axial direction in the hole wall during drilling, the stress on the tip is concentrated and it is easy to wear under friction. And after wear, the tip may not be able to penetrate into the hole wall, and the anti-rotation effect cannot be achieved. Utility Model Content

[0005] The utility model provides a support plate assembly, an anti-rotation support device and a directional coring drill tool to solve the wear problem in the drilling process.

[0006] According to one aspect of the utility model, a support plate assembly is provided, which is applicable to an anti-rotation support device, and the support plate assembly comprises:

[0007] The plate body has a front curved surface and a rear curved surface distributed along the thickness direction, wherein the front curved surface and the rear curved surface are both bent toward the same side in the thickness direction;

[0008] A rib is arranged on the front arc surface, the rib extends along the length direction of the plate body, and a narrow blade is formed at one end of the rib away from the plate body.

[0009] In some embodiments, the two end surfaces of the rib in the thickness direction are arc surfaces, the two end surfaces of the rib in the thickness direction are recessed toward one side of the plate body, and the narrow blade is formed at the position where the two end surfaces of the rib in the thickness direction intersect.

[0010] In some embodiments, at least one end of the rib along its length direction has an arc-shaped guiding surface; and / or

[0011] The ribs are detachably arranged on the plate body.

[0012] In some embodiments, the front curved surface of the plate body includes a top curved surface, a middle plane, and a bottom curved surface sequentially connected from top to bottom, and each of the ribs is distributed on the top curved surface and the bottom curved surface.

[0013] Another aspect of the utility model further provides an anti-rotation support device, the anti-rotation support device comprising:

[0014] case;

[0015] A roller assembly is disposed in the housing, the roller assembly comprises a roller, and the roller assembly can move radially until at least a portion of the roller extends out of the housing;

[0016] A driving assembly, disposed in the housing;

[0017] A support plate assembly, wherein the support plate assembly is disposed on the housing;

[0018] The driving assembly is used to drive the roller assembly (20) to radially extend out of the housing (10) so as to increase the radial dimension of the rib and the roller assembly (20) as a whole.

[0019] In some embodiments, the drive assembly includes:

[0020] A piston assembly, comprising a piston cylinder and a piston rod movably disposed in the piston cylinder, wherein the piston rod is connected to the roller assembly; and

[0021] The guide channel is used to provide pressure liquid to the piston cylinder to drive the roller assembly to extend radially.

[0022] In some embodiments, the anti-rotation support device includes a coupling, which is connected to both axial ends of the housing and surrounds a water-containing cavity with the housing;

[0023] The anti-rotation support device includes a central shaft, which is inserted into the housing and the coupling, and the central shaft has a hollow passage, a through hole is opened on the central shaft, and the hollow passage is connected with the water containing cavity through the through hole;

[0024] The anti-rotation support device comprises a connecting piece, wherein the connecting piece has a connecting channel, and the connecting channel is used to connect the piston cylinder with the water containing chamber;

[0025] Wherein, the hollow channel, the through hole, the water containing cavity and the connecting channel constitute a flow guiding channel.

[0026] In some embodiments, the support plate assembly (30) and the roller assembly (20) are symmetrically arranged in the circumferential direction of the housing (10).

[0027] In some embodiments, the outer wall of the housing is recessed to form a mounting groove, and the support plate assembly is disposed in the mounting groove;

[0028] The support plate assembly comprises:

[0029] The plate body has a front curved surface and a rear curved surface distributed along the thickness direction, wherein the front curved surface is convex outwards and the rear curved surface is concave outwards;

[0030] Ribs are distributed on the top and bottom sides of the front curved surface of the plate body, and the ribs extend along the length direction of the plate body;

[0031] The front curved surface of the plate body includes a top curved surface, a bottom curved surface and a middle plane, the middle plane connects the top curved surface and the bottom curved surface, and the ribs are distributed on the top curved surface and the bottom curved surface.

[0032] Another aspect of the utility model provides a directional coring drill, comprising a drill bit and an anti-rotation support device, wherein the drill bit is mounted on the front end of the central axis of the anti-rotation support device.

[0033] The utility model has the following beneficial effects: by making the ribs extend along the length direction of the plate body, the ribs have a certain length in the length direction of the plate body, that is, in the axial direction of the anti-rotation support device, so that the ribs are not easily worn, thereby increasing the service life. The narrow blade can reduce the resistance of the ribs penetrating into the wall of the drill hole. In addition, the ribs extending along the length direction of the plate body and the narrow blade can also reduce the resistance of the anti-rotation support device when it moves axially.

[0034] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0036] Figure 1 It is a structural schematic diagram of an anti-rotation support device of a preferred embodiment of the utility model;

[0037] Figure 2 It is a structural schematic diagram of one side of the support plate assembly of the anti-rotation support device of the preferred embodiment of the utility model;

[0038] Figure 3 It is a structural schematic diagram of one side of the roller assembly of the anti-rotation support device of the preferred embodiment of the utility model;

[0039] Figure 4 is a cross-sectional view of an anti-rotation support device of a preferred embodiment of the utility model;

[0040] Figure 5 yes Figure 4 A partial schematic diagram of

[0041] Figure 6 It is a structural schematic diagram of a support plate assembly of a preferred embodiment of the utility model;

[0042] Figure 7 is a side view of a support plate assembly of a preferred embodiment of the utility model;

[0043] Figure 8 It is a schematic structural diagram of the ribs of the preferred embodiment of the utility model.

[0044] Legend:

[0045] 10. housing; 10a. water containing cavity; 10b. mounting groove;

[0046] 20. Roller assembly; 21. Roller; 22. Bracket; 23. Bolt;

[0047] 30, support plate assembly; 31, plate body; 32, ribs; 31a, rear arc surface; 31b, top arc surface; 31c, midplane; 31d, bottom arc surface; 31e, first mounting hole; 31f, second mounting hole; 31g, notch; 32a, narrow blade; 32b, guide surface;

[0048] 41. piston rod; 42. piston cylinder; 43. elastic member;

[0049] 50. Coupling;

[0050] 60, central axis; 60a, hollow channel; 60b, through hole;

[0051] 70. Connector; 70a. Thread structure;

[0052] 80. Sealing ring;

[0053] 90. Fasteners. DETAILED DESCRIPTION

[0054] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0055] like Figure 6-8 As shown, a support plate assembly 30 is suitable for an anti-rotation support device. The support plate assembly 30 includes a plate body 31 and ribs 32.

[0056] The plate body 31 has a front curved surface and a rear curved surface 31a distributed along the thickness direction, and the front curved surface and the rear curved surface 31a are both bent toward the same side in the thickness direction. It can be understood that the plate body 31 is an arc-shaped plate structure.

[0057] The rib 32 is arranged on the front arc surface, and extends along the length direction of the plate body 31. The rib 32 forms a narrow blade 32a at one end of the rib 32 away from the plate body 31. It can be understood that the length direction of the plate body 31 is the axial direction of the anti-rotation support device.

[0058] It is understandable that the rib 32 protrudes from the front arc surface. The narrow blade 32a is used to penetrate into the wall of the drill hole.

[0059] By extending the ribs 32 along the length direction of the plate body 31, the ribs 32 have a certain length in the length direction of the plate body 31, that is, in the axial direction of the anti-rotation support device, so that the ribs 32 are not easily worn, thereby increasing the service life. The narrow blade 32a can reduce the resistance of the ribs 32 penetrating into the borehole wall. In addition, the ribs 32 extending along the length direction of the plate body 31 and the narrow blade 32a can also reduce the resistance of the anti-rotation support device when it moves axially.

[0060] The structure of the narrow blade 32 a is not limited. It is understandable that, in some embodiments, the thickness of the rib 32 gradually decreases from the end connected to the plate body 31 to the end away from the plate body 31 to form the narrow blade 32 a.

[0061] In some embodiments, in order to further reduce the resistance of the anti-rotation support device to axial movement, the two end surfaces of the rib 32 in the thickness direction are arc surfaces, and the two end surfaces of the rib 32 in the thickness direction are concave toward the side of the plate body 31. In this way, the volume of the rib 32 near the narrow blade 32a is smaller, so that the resistance during axial movement is smaller.

[0062] In some embodiments, at least one end of the rib 32 along its length direction has an arc-shaped guide surface 32b, so as to reduce the problem of easy wear caused by stress concentration at the end of the narrow blade 32a along its length direction during axial advancement.

[0063] In some embodiments, the front curved surface of the plate body 31 includes a top curved surface 31b, a middle plane 31c, and a bottom curved surface 31d connected in sequence from top to bottom, and each of the ribs 32 is distributed on the top curved surface 31b and the bottom curved surface 31d. From top to bottom corresponds to the width direction of the plate body 31. That is, Figure 7 Up and down direction.

[0064] It is understandable that the top arc surface 31b and the bottom arc surface 31d are arc surface structures. The middle plane 31c is a plane structure. It is understandable that after installation, the radial dimensions of the top arc surface 31b and the bottom arc surface 31d are larger than the radial dimensions of the middle plane 31c. When the top arc surface 31b and the bottom arc surface 31d are in contact with the borehole wall, the middle plane 31c does not contact with the borehole wall, thereby reducing friction. At the same time, the above structure can also increase the flexibility of the plate body 31. When the axial force is uneven, the rib 32 can be kept in contact with the borehole wall by its own deformation.

[0065] Please refer to Figure 1-8 This embodiment also provides an anti-rotation support device, including a housing 10, a roller assembly 20, a drive assembly and a support plate assembly 30.

[0066] The housing 10 is used to provide a mounting base for the roller assembly 20 , the driving assembly and the support plate assembly 30 .

[0067] The roller assembly 20 is disposed in the housing 10, and the roller assembly 20 includes a roller 21. The roller assembly 20 can move radially until at least part of the roller 21 protrudes from the housing 10. It can be understood that the roller 21 protruding from the housing 10 can contact the wall of the drilled hole, and the roller 21 and the wall of the drilled hole are in rolling contact, and the friction force is relatively small.

[0068] The driving assembly is arranged in the housing 10, and is used to drive the roller assembly 20 to move radially. In other words, the driving assembly can drive the roller 21 to extend out of the housing 10 to abut against the wall of the drill hole.

[0069] The support plate assembly 30 is disposed on the housing 10 .

[0070] The driving assembly is used to drive the roller assembly 20 to radially extend out of the housing 10 to increase the radial dimension of the rib and the roller assembly 20 as a whole.

[0071] The driving assembly drives the roller assembly 20 to move radially, so that part or all of the roller 21 extends out of the housing 10 to abut against the borehole wall and generate radial interaction force. Due to the overall radial dimensions of the ribs and the roller assembly 20, the reaction force of the borehole wall causes the support plate assembly 30 to squeeze the borehole wall on the other side, so that the ribs 32 penetrate into the borehole wall to play an anti-rotation role. After drilling stops, the driving assembly works, the roller 21 leaves the borehole wall, and the ribs 32 are basically separated from the borehole wall. At this time, the anti-rotation device can be easily pulled out of the borehole without generating axial resistance.

[0072] In some embodiments, the support plate assembly 30 and the roller assembly 20 are symmetrically arranged in the circumferential direction of the housing 10 .

[0073] It is understandable that there is no limit to the number of the support plate assemblies 30. In some embodiments, each support plate assembly 30 is correspondingly provided with a plurality of roller assemblies 20, and the plurality of roller assemblies are sequentially arranged along the axial direction.

[0074] It is understandable that the housing 10 has windows for the roller 21 to extend out of.

[0075] It is understandable that the drive assembly may be electrically driven or may be driven in other ways such as hydraulically driven.

[0076] In some embodiments, the driving assembly includes a piston assembly and a guide channel, the piston assembly includes a piston cylinder 42 and a piston rod 41 movably disposed in the piston cylinder 42, and the piston rod 41 can move radially in the piston cylinder 42. The piston rod 41 is connected to the roller assembly 20.

[0077] The guide channel is used to provide pressure liquid to the piston cylinder 42 to drive the roller assembly 20 to extend radially. In other words, the piston rod 41 is driven to move radially through the guide channel, thereby pushing out the roller assembly 20.

[0078] It is understandable that the hydraulic drive can provide greater pressure, making it easier for the ribs 32 to cut into the inner wall of the borehole, thus achieving a good anti-rotation effect.

[0079] In some embodiments, the anti-rotation support device includes a coupling 50 , which is connected to two axial ends of the housing 10 and encloses a water-containing chamber 10 a together with the housing 10 .

[0080] The anti-rotation support device includes a central shaft 60, which is inserted into the housing 10 and the coupling 50. The central shaft 60 has a hollow passage 60a, and a through hole 60b is formed on the central shaft 60. The hollow passage 60a is connected to the water containing chamber 10a through the through hole 60b. It can be understood that the hollow passage 60a can provide liquid, and the liquid can flow out from the through hole 60b into the water containing chamber 10a.

[0081] The anti-rotation support device includes a connecting member 70, and the connecting member 70 has a connecting channel, and the connecting channel is used to connect the piston cylinder 42 and the water containing chamber 10a. In other words, the liquid flowing into the water containing chamber 10a can enter the piston cylinder 42 from the connecting channel to drive the piston rod 41 to move.

[0082] The hollow channel 60a, the through hole 60b, the water containing cavity 10a and the connecting channel constitute a flow guiding channel.

[0083] In some embodiments, the shell 10 is cylindrical in shape and has receiving grooves at both ends. Part of the coupling 50 is inserted into the receiving groove. The axial end surface of the coupling 50 and part of the inner wall of the receiving groove surround the water containing cavity 10a.

[0084] In some embodiments, a threaded hole is opened on the end face of the accommodating groove opposite to the coupling 50, so that a threaded structure 70a is formed on the outer surface of the connecting member 70, and the connecting member 70 is threadedly connected to the threaded hole to achieve installation of the connecting member 70.

[0085] In some embodiments, the anti-rotation support device includes a sealing ring 80, part of which is disposed between the central shaft 60 and the coupling 50 to close one end of the water-containing chamber 10a, and another part of which is disposed between the central shaft 60 and the housing 10 to close the other end of the water-containing chamber 10a. The gap between the central shaft 60 and the coupling 50, and the gap between the central shaft 60 and the housing 10 are closed in sequence.

[0086] In order to arrange the sealing ring 80 , corresponding annular grooves may be provided at corresponding positions of the coupling 50 and the housing 10 .

[0087] In some embodiments, the driving assembly includes an elastic member 43, and the elastic member 43 is used to make the piston rod 41 have a tendency to move radially inward.

[0088] The arrangement of the elastic member 43 is not limited. The elastic member 43 is arranged between the piston cylinder 42 and the piston rod 41 . One end of the elastic member 43 is connected to the inner wall of the piston cylinder 42 , and the other end is connected to the piston rod 41 .

[0089] The structure of the elastic member 43 is not limited. In some embodiments, the elastic member 43 is a return spring.

[0090] It is understandable that the structure of the roller assembly 20 is not limited. In some embodiments, the roller assembly 20 includes a bracket 22, the bracket 22 is connected to the piston rod 41, and a plurality of rollers 21 are axially spaced apart on the bracket 22. The rollers 21 can be rotatably arranged on the bracket 22 by bolts 23.

[0091] In some embodiments, the outer wall of the housing 10 is recessed to form a mounting groove 10b, and the support plate assembly 30 is disposed in the mounting groove 10b, thereby reducing movement obstacles.

[0092] In some embodiments, a plurality of first mounting holes 31 e are provided on the plate body 31 , and the fasteners 90 are disposed in the first mounting holes 31 e and fastened to the housing 10 , thereby achieving installation of the support plate assembly 30 .

[0093] In order to facilitate the disassembly of the support plate assembly 30 , in some embodiments, a notch 31 g is provided at at least one end of the plate body 31 in the length direction, so that the plate body 31 can be pried out through the notch 31 g.

[0094] The connection method between the rib 32 and the plate body 31 is not limited.

[0095] To facilitate replacement of the ribs 32 , in some embodiments, a plurality of second mounting holes 31 f are provided on the plate body 31 , and the plurality of second mounting holes 31 f extend axially into multiple rows, and the ribs 32 are detachably connected to the plate body 31 through the second mounting holes 31 f and fasteners 90 .

[0096] The embodiment of the present application further discloses a directional coring drill, including a drill bit and an anti-rotation support device, wherein the drill bit is mounted on the front end of a central axis 60 of the anti-rotation support device.

[0097] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A support plate assembly (30), characterized in that: Applicable to an anti-rotation support device, the support plate assembly (30) comprises a plate body (31) having a front curved surface and a rear curved surface (31a) distributed along the thickness direction, wherein the front curved surface and the rear curved surface (31a) are both bent toward the same side in the thickness direction; A rib (32) is arranged on the front arc surface, the rib (32) extends along the length direction of the plate body (31), and a narrow blade (32a) is formed at one end of the rib (32) away from the plate body (31).

2. The support plate assembly (30) according to claim 1, characterized in that: The two end surfaces of the rib (32) in the thickness direction are arcuate surfaces, the two end surfaces of the rib (32) in the thickness direction are recessed toward one side of the plate body (31), and the narrow blade (32a) is formed at the position where the two end surfaces of the rib (32) in the thickness direction intersect.

3. The support plate assembly (30) according to claim 1, characterized in that: At least one end of the rib (32) along its length direction has an arc-shaped guide surface (32b); and / or The ribs (32) are detachably arranged on the plate body (31).

4. The support plate assembly (30) according to claim 1, characterized in that: The front curved surface of the plate body (31) comprises a top curved surface (31b), a middle plane (31c), and a bottom curved surface (31d) which are sequentially connected from top to bottom, and each of the ribs (32) is distributed on the top curved surface (31b) and the bottom curved surface (31d).

5. An anti-rotation support device, characterized in that: The anti-rotation support device comprises: Housing (10); A roller assembly (20) is disposed in the housing (10), the roller assembly (20) comprising a roller (21), and the roller assembly (20) is movable in a radial direction until at least a portion of the roller (21) protrudes out of the housing (10); A driving assembly, disposed in the housing (10); The support plate assembly (30) according to any one of claims 1 to 4, wherein the support plate assembly (30) is arranged on the housing (10); The driving assembly is used to drive the roller assembly (20) to radially extend out of the housing (10) so as to increase the radial dimension of the rib and the roller assembly (20) as a whole.

6. The anti-rotation support device according to claim 5, characterized in that: The drive assembly comprises: A piston assembly, comprising a piston cylinder (42) and a piston rod (41) movably arranged in the piston cylinder (42), wherein the piston rod (41) is connected to the roller assembly (20); and The guide channel is used to provide pressure liquid to the piston cylinder (42) to drive the roller assembly (20) to extend radially.

7. The anti-rotation support device according to claim 6, characterized in that: The anti-rotation support device comprises a coupling (50), the coupling (50) being connected to two axial ends of the housing (10) and enclosing a water containing cavity (10a) with the housing (10); The anti-rotation support device comprises a central shaft (60) which is inserted into the housing (10) and the coupling (50); the central shaft (60) has a hollow passage (60a); a through hole (60b) is formed on the central shaft (60); the hollow passage (60a) is connected to the water containing chamber (10a) through the through hole (60b); The anti-rotation support device comprises a connecting piece (70), wherein the connecting piece (70) has a connecting channel, and the connecting channel is used to connect the piston cylinder (42) and the water containing chamber (10a); Wherein, the hollow channel (60a), the through hole (60b), the water containing cavity (10a) and the connecting channel constitute a flow guiding channel.

8. The anti-rotation support device according to claim 5, characterized in that: The support plate assembly (30) and the roller assembly (20) are symmetrically arranged in the circumferential direction of the housing (10).

9. The anti-rotation support device according to any one of claims 5 to 7, characterized in that: The outer wall of the housing (10) is recessed to form a mounting groove (10b), and the support plate assembly (30) is arranged in the mounting groove (10b); The support plate assembly (30) comprises: The plate body (31) has a front curved surface and a rear curved surface (31a) distributed along the thickness direction, and the front curved surface and the rear curved surface (31a) are both curved toward the same side in the thickness direction; A rib (32) is arranged on the front arc surface, the rib (32) extends along the length direction of the plate body (31), and a narrow blade (32a) is formed at one end of the rib (32) away from the plate body (31); The front curved surface of the plate body (31) comprises a top curved surface (31b), a middle plane (31c), and a bottom curved surface (31d) which are sequentially connected from top to bottom, and each of the ribs (32) is distributed on the top curved surface (31b) and the bottom curved surface (31d).

10. A directional coring drill, comprising a drill bit, characterized in that: It also comprises the anti-rotation support device according to any one of claims 5 to 9, wherein the drill bit is mounted on the front end of the central axis (60) of the anti-rotation support device.

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