Synchronous casing-following wire-line coring drilling tool

Abstract

The invention relates to the technical field of geological core drilling, in particular to a synchronous casing rope coring drilling tool which comprises an outer pipe assembly and an inner pipe assembly, the outer pipe assembly comprises an outer pipe and a coring drill bit, the coring drill bit is detachably arranged at the lower end of the outer pipe, a mounting hole is formed in the middle of the outer pipe, and the inner pipe assembly is arranged in the mounting hole. The inner pipe assembly is detachably arranged in the mounting hole and can move back and forth in the direction of the mounting hole, the reaming assembly is arranged, the reaming assembly comprises two cutting wings and a connecting reset spring, and the inner pipe assembly can enable the reaming assembly to be in an opening state and a closing state, so that the wire-line coring drilling tool can conduct drilling and reaming at the same time, and the drilling efficiency is improved. Synchronous root canal drilling is conveniently achieved, the number of times of drilling in the coring process is reduced, the time of auxiliary work is shortened, the coring efficiency is remarkably improved, and the coring cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of geological core drilling, and in particular to a synchronous pipe-and-rope coring drill. Background Art

[0002] Core drilling is the most effective and direct way to obtain deep stratum data in the early geological survey stage of engineering construction. At present, core drilling in broken and complex broken strata is prone to cause hole wall collapse, resulting in buried drill and causing accidents in the hole. For this situation, the commonly used method is to lower the casing, that is, use a larger diameter drill to make a hole, after passing through the complex strata, lift the large drill, and then lower the casing, and then continue drilling with a smaller drill. The casing lowering process is simple to operate, but for complex strata with multiple sections and different depths, the aperture needs to be continuously reduced, which not only seriously reduces the drilling efficiency, but also increases the drilling cost, thereby reducing the coring efficiency and increasing the coring cost, which is not conducive to large-scale use. Summary of the invention

[0003] The technical problem solved by the invention is to provide a synchronous pipe-and-rope coring drill with high coring efficiency and low cost.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a synchronous pipe-following rope coring drill tool, comprising an outer pipe assembly and an inner pipe assembly, the outer pipe assembly comprising an outer pipe and a coring drill bit, the coring drill bit being detachably arranged at the lower end of the outer pipe, a mounting hole being arranged in the middle of the outer pipe, the mounting hole being arranged along the axial direction thereof, the inner pipe assembly being detachably arranged in the mounting hole and being able to move back and forth along the direction of the mounting hole, and further comprising at least one set of hole expanding components, the hole expanding components comprising two cutting wings and a connecting reset spring, the inner sides of the two cutting wings being connected by the connecting reset spring;

[0005] At least two through holes are arranged on the side wall of the mounting hole, a cutting wing is arranged in one of the through holes, and the outer end of the cutting wing is located in the through hole. When the inner tube assembly moves along the direction of the mounting hole, the outer end of the cutting wing can be squeezed out to the outside of the through hole, and at the same time, the inner tube assembly presses the inner side of the cutting wing to keep the outer end of the cutting wing located outside the through hole.

[0006] Furthermore, the core drill bit is detachably arranged at the lower end of the outer tube by means of a threaded connection.

[0007] Furthermore, the mounting hole and the through hole are arranged perpendicular to each other.

[0008] Furthermore, the number of the hole expansion components is one group, and the two cutting wings are respectively arranged on both sides of the inner tube assembly, and the central axes of the two cutting wings are on the same straight line in the same horizontal plane.

[0009] Furthermore, the cutting wing comprises a main body portion, and an inner upper surface of the main body portion is provided with a first guiding inclined surface.

[0010] Furthermore, arc-shaped balance plates are respectively provided on both sides of the inner end of the main body.

[0011] Furthermore, the connection between the arc-shaped balance plate and the main body is located below the first guiding inclined surface.

[0012] Furthermore, a second guiding inclined surface is provided on the upper surface of the arc-shaped balance plate.

[0013] Furthermore, a connecting portion is arranged on the outer side of the arc-shaped balance plate, a connecting protrusion is arranged on the connecting portion, and a connecting reset spring connects the two cutting wings via the connecting protrusion.

[0014] The beneficial effects of the present invention are as follows: by providing a reaming assembly, the reaming assembly includes two cutting wings and a connecting reset spring, and the inner tube assembly can make the reaming assembly in an open state and a retracted state. When the reaming assembly is in the open state, the maximum distance between the cutting wings is greater than the diameter of the coring drill bit, and when the reaming assembly is in the retracted state, the maximum distance between the cutting wings is less than the diameter of the coring drill bit, so that the rope coring drill tool of the present invention can perform drilling and reaming at the same time, which is convenient for realizing synchronous root canal drilling, reduces the number of drilling times during coring, reduces the time of auxiliary work, significantly improves the coring efficiency and reduces the coring cost, and can also protect the original sample of the core, has good economic benefits and application value, and is conducive to large-scale use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the assembly of the outer tube, the core drill bit and the cutting wing of the present invention;

[0016] Figure 2 yes Figure 1 A top view schematic diagram of

[0017] Figure 3 It is a schematic diagram of the structure of the present invention;

[0018] Figure 4 yes Figure 3 A top view schematic diagram of

[0019] Figure 5 is a schematic diagram of the structure of the cutting wing;

[0020] Marked as: inner tube assembly 1, outer tube 2, core drill bit 3, cutting wing 4, connection reset spring 5, mounting hole 6, first guide slope 7, arc-shaped balance plate 8, second guide slope 9, connecting part 10. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the synchronous pipe-following rope coring drill tool of the present invention comprises an outer pipe assembly and an inner pipe assembly 1, wherein the outer pipe assembly comprises an outer pipe 2 and a coring drill bit 3, wherein the coring drill bit 3 is detachably arranged at the lower end of the outer pipe 2, wherein a mounting hole 6 is arranged in the middle of the outer pipe 2, wherein the mounting hole 6 is arranged along the axial direction thereof, wherein the inner pipe assembly 1 is detachably arranged in the mounting hole 6 and can move back and forth along the mounting hole 6, and further comprises at least one set of reaming components, wherein the reaming components comprises two cutting wings 4 and a connecting reset spring 5, wherein the inner sides of the two cutting wings 4 are connected via the connecting reset spring 5;

[0023] At least two through holes are arranged on the side wall of the mounting hole 6, a cutting wing 4 is arranged in one of the through holes, and the outer end of the cutting wing 4 is located in the through hole, and when the inner tube assembly 1 moves along the mounting hole 6, the outer end of the cutting wing 4 can be squeezed out to the outside of the through hole, and at the same time, the inner tube assembly 1 presses the inner side of the cutting wing 4 to keep the outer end of the cutting wing 4 located outside the through hole.

[0024] For example Figure 1 As shown, a cutting wing 4 is disposed in a through hole, and the outer end of the cutting wing 4 is located in the through hole. At this time, the reaming assembly is in a retracted state, and the maximum distance between the cutting wings 4 (the distance between the outer ends of the cutting wings 4) is smaller than the diameter of the core drill 3; Figure 3 As shown, when the inner tube assembly 1 moves downward along the mounting hole 6, the outer end of the cutting wing 4 is squeezed out to the outside of the through hole. At the same time, the inner tube assembly 1 presses the inner side of the cutting wing 4 so that the cutting wing 4 maintains its outer end outside the through hole. At this time, the reaming assembly is in an open state, and the maximum distance between the cutting wings 4 (the distance between the outer ends of the cutting wings 4) is smaller than the diameter of the core drill bit 3.

[0025] The working principle of the synchronous pipe-following rope coring drill tool of the present invention is: the motor drives the outer pipe 2 to rotate, and the outer pipe 2 drives the coring drill bit 3 and the reaming assembly to rotate to form a drill hole and an reaming hole, and the inner pipe assembly 1 is arranged in the outer pipe 2. During the downward drilling process of the coring drill tool, the core enters the inner pipe assembly 1 through the coring drill bit 3. When the coring requirements are met, the inner pipe assembly salvage device is lowered and the inner pipe assembly 1 can be lifted out. The working process of the synchronous follow-up pipe rope coring drill is as follows: first, the outer tube 2 is lowered to the bottom of the hole with the reaming assembly, at which time the reaming assembly is in a retracted state, and then the inner tube assembly 1 is set in the outer tube 2. During the downward movement of the inner tube assembly 1 along the mounting hole 6, the inner tube assembly 1 contacts the cutting wing 4 and squeezes the outer end of the cutting wing 4 to the outside of the through-hole. At the same time, the inner tube assembly 1 presses the inner side of the cutting wing 4 to keep the cutting wing 4 at its outer end located outside the through-hole. At this time, the reaming assembly is in an open state, and then the motor works. During the drilling process of the synchronous follow-up pipe rope coring drill, the reaming assembly always remains in an open state to ensure that drilling and reaming are carried out simultaneously. The casing is synchronously followed during the drilling process to achieve real-time isolation of the formation and synchronous root canal drilling. Finally, when the coring requirements are met, the inner tube assembly salvage device is lowered and the inner tube assembly 1 is lifted out.

[0026] Specifically, in order to facilitate the installation and replacement of the core drill bit 3, the core drill bit 3 is preferably detachably arranged at the lower end of the outer tube 2 by means of a threaded connection.

[0027] The mounting holes 6 are arranged along the axial direction of the outer tube 2. When in use, the outer tube 2 is usually arranged vertically. In order to improve the use effect of the hole expansion assembly, Figure 1 , Figure 3 As shown, the mounting hole 6 and the through hole are arranged perpendicularly to each other, that is, the mounting hole 6 is arranged horizontally, and thus the cutting wing 4 is also arranged horizontally.

[0028] The number of the hole expansion components can be multiple groups, but when there are multiple groups of hole expansion components, the manufacturing cost of the entire rope coring drill is higher. In order to reduce the manufacturing cost of the rope coring drill, Figure 2 , Figure 4 As shown, the number of the reaming components is preferably one group, and the two cutting wings 4 are respectively arranged on both sides of the inner tube assembly 1, and the central axes of the two cutting wings 4 are on the same straight line in the same horizontal plane.

[0029] In order to facilitate the inner tube assembly 1 to extrude the outer end of the cutting wing 4 to the outside of the through hole, Figure 5As shown, the cutting wing 4 includes a main body, and a first guiding bevel 7 is provided on the inner upper surface of the main body. When the inner tube assembly 1 moves downward, the inner tube assembly 1 first contacts the first guiding bevel 7 and enters the two cutting wings 4 under the guidance of the first guiding bevel 7. The bevel angle of the first guiding bevel 7 is 30-60°, preferably 45°. The shape of the main body is preferably rectangular, and the connection and matching mode between it and the through hole is clearance matching.

[0030] The hole expanding assembly needs to rotate with the outer tube 2 when expanding the hole, and the inner tube assembly 1 is cylindrical. In order to improve the stability of the hole expanding assembly when in use, Figure 5 As shown, arc-shaped balancing plates 8 are respectively provided on both sides of the inner end of the main body. In order to prevent the arc-shaped balancing plate 8 from affecting the inner tube assembly 1 to extrude the outer end of the cutting wing 4 to the outside of the through hole, the connection between the arc-shaped balancing plate 8 and the main body is located below the first guiding inclined surface 7, and the upper surface of the arc-shaped balancing plate 8 is provided with a second guiding inclined surface 9.

[0031] The inner sides of the two cutting wings 4 are connected by connecting the reset springs 5. In order to ensure the connection effect, the number of the connecting reset springs 5 ​​is multiple, and all the connecting reset springs 5 ​​are arranged in parallel with each other. Figure 5 As shown, a connecting portion 10 is provided on the outer side of the arc-shaped balance plate 8, and a connecting protrusion is provided on the connecting portion 10. The connecting reset spring 5 connects the two cutting wings 4 through the connecting protrusion.

[0032] To sum up, when the inner tube assembly 1 is not arranged in the outer tube 2, the reaming assembly is in a retracted state, which facilitates the free movement of the entire coring drill in the borehole or the casing; when the inner tube assembly 1 is arranged in the outer tube 2, the reaming assembly is in an open state, and the borehole is expanded to ensure that drilling and reaming are carried out simultaneously, so that the rope coring drill of the present invention can achieve synchronous root canal drilling, reduce the number of drilling times during coring, reduce the time of auxiliary work, significantly improve the coring efficiency and reduce the coring cost, and can also protect the original sample of the core, has good economic benefits and application value, and is conducive to large-scale use.

Claims

1. A synchronous pipe-following rope coring drill, comprising an outer pipe assembly and an inner pipe assembly (1), wherein the outer pipe assembly comprises an outer pipe (2) and a coring drill bit (3), wherein the coring drill bit (3) is detachably arranged at the lower end of the outer pipe (2), wherein a mounting hole (6) is arranged in the middle of the outer pipe (2), wherein the mounting hole (6) is arranged along the axial direction thereof, and wherein the inner pipe assembly (1) is detachably arranged in the mounting hole (6) and can move back and forth along the direction of the mounting hole (6), ... It also includes at least one group of hole expansion components, the hole expansion components including two cutting wings (4) and a connecting reset spring (5), the inner sides of the two cutting wings (4) are connected via the connecting reset spring (5); At least two through holes are arranged on the side wall of the mounting hole (6), a cutting wing (4) is arranged in one of the through holes, and the outer end of the cutting wing (4) is located in the through hole. When the inner tube assembly (1) moves along the mounting hole (6), the outer end of the cutting wing (4) can be squeezed out to the outside of the through hole, and at the same time, the inner tube assembly (1) presses against the inner side of the cutting wing (4) so ​​that the cutting wing (4) maintains a state in which its outer end is located outside the through hole.

2. The synchronous pipe-following wireline coring drill according to claim 1, characterized in that: The core drill bit (3) is detachably arranged at the lower end of the outer tube (2) by means of a threaded connection.

3. The synchronous pipe-following wireline coring drill according to claim 1, characterized in that: The mounting hole (6) and the through hole are arranged perpendicular to each other.

4. The synchronous pipe-following wireline coring drill according to claim 1, characterized in that: The number of the hole expansion components is one group, and the two cutting wings (4) are respectively arranged on both sides of the inner tube assembly (1), and the central axes of the two cutting wings (4) are on the same straight line in the same horizontal plane.

5. The synchronous pipe-following wireline coring drill according to any one of claims 1 to 4, characterized in that: The cutting wing (4) comprises a main body portion, and a first guiding inclined surface (7) is arranged on the inner upper surface of the main body portion.

6. The synchronous pipe-following wireline coring drill according to claim 5, characterized in that: Arc-shaped balancing plates (8) are respectively arranged on both sides of the inner end of the main body.

7. The synchronous pipe-following wireline coring drill according to claim 6, characterized in that: The connection point between the arc-shaped balance plate (8) and the main body is located below the first guide inclined surface (7).

8. The synchronous pipe-following wireline coring drill according to claim 6, characterized in that: The upper surface of the arc-shaped balance plate (8) is provided with a second guiding inclined surface (9).

9. The synchronous pipe-following wireline coring drill according to claim 6, characterized in that: A connecting portion (10) is arranged on the outer side of the arc-shaped balance plate (8), and a connecting protrusion is arranged on the connecting portion (10). The connecting reset spring (5) connects the two cutting wings (4) via the connecting protrusion.

Images