Drill rod capable of preventing drill hole from being blocked

Abstract

The utility model relates to the technical field of drilling equipment, and discloses a drill rod for preventing a drill hole from being blocked, which comprises a bottom drill rod and an anti-blocking component arranged in the bottom drill rod, a drill bit is fixedly connected to the bottom end of the bottom drill rod, and a connecting component is arranged at the top end of the bottom drill rod. The anti-blocking assembly comprises a bottom grouting pipe inserted into the bottom drill rod, the bottom end of the bottom grouting pipe is fixedly connected with a limiting plate, and the outer circumferential wall of the limiting plate is fixedly connected with the inner circumferential wall of the bottom drill rod; the effect of improving the anti-blocking effect of the device is achieved, the flow speed of pressurized water slurry is further increased through the arrangement of the grouting reducing pipe, the pressurized water slurry conveniently impacts rock-soil particles in a drill hole, and then the bottom drill rod and the spiral piece are matched with each other, so that the anti-blocking effect of the device is improved. The rock-soil particles rise to the outside of the drill hole along the gap between the device and the inner wall of the drill hole, a slurry wall protection system is formed, and the problem that the effect of preventing the drill hole from being blocked by the device is difficult to effectively improve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, and specifically relates to a drill pipe for preventing borehole blockage. Background Technique

[0002] A drill pipe is a steel pipe with threads at the tail, used to connect the surface equipment of a drilling rig and the drilling and grinding equipment or bottom hole device located at the bottom of the well. The purpose of the drill pipe is to transport drilling mud to the drill bit and, together with the drill bit, raise, lower, or rotate the bottom hole device.

[0003] After retrieval, a Chinese patent with the publication number CN215595505U discloses a drill pipe for preventing borehole blockage, including: a drill barrel, and adjacent drill barrels are threadedly connected end to end; a support frame, the support frame is installed inside the drill barrel; a pull rod, the pull rod is installed on the support frame, and adjacent pull rods are hooked and connected end to end.

[0004] This device strengthens the drill pipe through the pull rod, reducing the probability of the drill barrel breaking. When the drill barrel breaks, the existence of the pull rod can ensure that the drill pipe remains connected in a broken state, and the broken drill barrel can be pulled out of the borehole through the pull rod, effectively preventing the drill pipe from breaking and falling to block the drill.

[0005] However, this device still has the following problems. The device reduces the risk of the drill barrel breaking through the mutual cooperation between the support frame and the pull rod. However, compared with general traditional drill pipes, it does not significantly change the hole-forming grouting operation method, and it is difficult to carry away large-particle rock and soil in the borehole, resulting in some particles converging at the water outlet of the drill pipe, and it is difficult to effectively improve the effect of the device in preventing borehole blockage. Content of the Utility Model

[0006] (1) Technical Problem to be Solved

[0007] In view of the deficiencies of the prior art, the utility model provides a drill pipe for preventing borehole blockage, which solves the problem of the above-mentioned difficulty in effectively improving the effect of the device in preventing borehole blockage.

[0008] (2) Technical Solution

[0009] To achieve the above object, the utility model provides the following technical solution: A drill pipe for preventing borehole blockage, including a bottom drill pipe, the bottom end of the bottom drill pipe is fixedly connected with a drill bit, and further includes an anti-blocking component arranged inside the bottom drill pipe, and a connection component is arranged at the top end of the bottom drill pipe;

[0010] The anti-blocking component includes a bottom grouting pipe inserted into the inner part of the bottom drill pipe. The bottom end of the bottom grouting pipe is fixedly connected with a limiting plate, and the outer peripheral wall of the limiting plate is fixedly connected with the inner peripheral wall of the bottom drill pipe. A plurality of uniformly distributed through holes are formed in the bottom of the limiting plate, and the top ends of the through holes are fixedly communicated with the bottom end of the bottom grouting pipe. A plurality of grouting holes are formed in the outer wall of the drill bit, and a grouting reducing pipe is fixedly communicated between the top end of each grouting hole and the bottom end of the through hole. The inner diameter of the top end of the grouting reducing pipe is larger than that of the bottom end. A one-way valve is installed in each grouting hole.

[0011] Preferably, the connection component includes a drill pipe external thread end formed at the top end of the outer peripheral wall of the bottom drill pipe. A connection drill pipe is arranged at the top end of the bottom drill pipe. A drill pipe internal thread end meshing with the drill pipe external thread end is formed at the bottom end of the inner peripheral wall of the connection drill pipe.

[0012] Preferably, a grouting pipe internal thread end is formed at the top end of the inner peripheral wall of the bottom grouting pipe. A connection grouting pipe is arranged at the top end of the bottom grouting pipe. A grouting pipe external thread end meshing with the grouting pipe internal thread end is formed at the bottom end of the outer peripheral wall of the connection grouting pipe.

[0013] Preferably, an annular sealing strip is fixedly connected to the top of the bottom drill pipe, and the cross section of the annular sealing strip is arranged in a triangular structure.

[0014] Preferably, spiral blades are fixedly connected to the outer peripheral walls of both the bottom drill pipe and the connection drill pipe. Limiting rings are fixedly connected to the outer peripheral walls of both the bottom drill pipe and the connection drill pipe near the spiral blades. The cross section of the limiting ring is arranged in a right-angled triangle structure.

[0015] (III) Beneficial effects

[0016] 1. For this drill pipe for preventing borehole blockage, through the mutual cooperation between the connection grouting pipe and the bottom grouting pipe, pressurized water slurry is injected into the grouting reducing pipe. Then, through the setting of the grouting reducing pipe, the flow rate of the water slurry is further increased, facilitating the pressurized water slurry to impact the surplus rock and soil particles inside the borehole. Through the mutual cooperation between the bottom drill pipe, the connection drill pipe and the spiral blades, the surplus rock and soil particles rise back to the outside of the borehole along the gap between the device and the inner wall of the borehole, forming a slurry protection wall system, effectively avoiding borehole collapse and improving the anti-blocking effect of the device.

[0017] 2. This drill pipe for preventing borehole blockage is practical, efficient and ingeniously designed. Through the setting of the limiting ring with a cross section in a right-angled triangle structure, it is avoided that the rock and soil particles adhere to the connection part between the connection drill pipe and the bottom drill pipe during the rising process, avoiding affecting the rising efficiency of the rock and soil particles. Description of the drawings

[0018] Figure 1Schematic diagram of the three-dimensional structure of the first perspective of the present utility model;

[0019] Figure 2 Schematic diagram of the three-dimensional structure of a partial cross-section of some components of the present utility model;

[0020] Figure 3 Schematic diagram of the three-dimensional structure of a partial cross-section of some grouting components of the present utility model;

[0021] Figure 4 is Figure 3 Enlarged schematic diagram at position A in

[0022] In the figure: 1, bottom drill pipe; 2, drill bit; 3, bottom grouting pipe; 4, limit ring; 5, connecting drill pipe; 6, internal threaded end of drill pipe; 7, external threaded end of drill pipe; 8, connecting grouting pipe; 9, external threaded end of grouting pipe; 10, internal threaded end of grouting pipe; 11, annular sealing strip; 12, limit plate; 13, through hole; 14, grouting hole; 15, grouting reducer pipe; 16, one-way valve; 17, spiral blade. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment: As Figure 1 shown, a drill pipe for preventing drilling blockage includes a bottom drill pipe 1, wherein the bottom drill pipe 1 is made of a composite metal material and has the characteristics of high strength and high anti-torsion performance, improving the overall structural strength of the device. The bottom end of the bottom drill pipe 1 is fixedly connected with a drill bit 2, wherein the drill bit 2 plays a role in drilling. It also includes an anti-blocking component arranged inside the bottom drill pipe 1, and a connecting component is arranged at the top end of the bottom drill pipe 1.

[0025] As Figure 3 and Figure 4As shown, in one embodiment, in order to increase the drilling depth of the device, the connection assembly includes a drill pipe external thread end 7 opened at the top end of the outer peripheral wall of the bottom drill pipe 1. A connection drill pipe 5 is provided at the top end of the bottom drill pipe 1. A drill pipe internal thread end 6 meshing with the drill pipe external thread end 7 is opened at the bottom end of the inner peripheral wall of the connection drill pipe 5. Through the mutual cooperation between the drill pipe internal thread end 6 and the drill pipe external thread end 7, it is convenient to quickly and stably connect the bottom drill pipe 1 and the connection drill pipe 5, which is convenient to increase the drilling depth of the device. A grouting pipe internal thread end 10 is opened at the top end of the inner peripheral wall of the bottom grouting pipe 3. A connection grouting pipe 8 is provided at the top end of the bottom grouting pipe 3. A grouting pipe external thread end 9 meshing with the grouting pipe internal thread end 10 is opened at the bottom end of the outer peripheral wall of the connection grouting pipe 8. Through the mutual cooperation between the grouting pipe external thread end 9 and the grouting pipe internal thread end 10, it is convenient to quickly and stably connect the bottom grouting pipe 3 and the connection grouting pipe 8, which is convenient to increase the operation depth of the anti-blocking assembly.

[0026] As Figure 2 with Figure 3As shown, in one embodiment, in order to improve the anti-blocking effect of the device, the anti-blocking component includes a bottom grouting pipe 3 inserted into the inner part of the bottom drill pipe 1. The bottom grouting pipe 3 plays a role in strengthening the bottom drill pipe 1 and facilitating grouting. The bottom end of the bottom grouting pipe 3 is fixedly connected with a limiting plate 12, and the outer peripheral wall of the limiting plate 12 is fixedly connected with the inner peripheral wall of the bottom drill pipe 1. The limiting plate 12 plays a role in fixing and supporting the bottom grouting pipe 3. A plurality of uniformly distributed through holes 13 are formed in the bottom of the limiting plate 12, and the top ends of the through holes 13 are fixedly communicated with the bottom end of the bottom grouting pipe 3. A plurality of grouting holes 14 are formed in the outer wall of the drill bit 2. The grouting holes 14 play a role in facilitating the impact of high-pressure water slurry on the surplus rock and soil particles in the drill hole. A grouting reducing pipe 15 is fixedly connected between the top end of each grouting hole 14 and the bottom end of the through hole 13, and the inner diameter of the top end of the grouting reducing pipe 15 is larger than that of the bottom end. Through the setting of the grouting reducing pipe 15, the flow rate of the water slurry is further increased. A one-way valve 16 is installed in each grouting hole 14. The one-way valve 16 plays a role in preventing the mud in the drill hole from entering the inside of the drill bit 2. The top of the bottom drill pipe 1 is fixedly connected with an annular sealing strip 11, and the cross section of the annular sealing strip 11 is triangular. The annular sealing strip 11 plays a role in sealing. The outer peripheral walls of the bottom drill pipe 1 and the connecting drill pipe 5 are both fixedly connected with spiral blades 17. Through the mutual cooperation among the bottom drill pipe 1, the connecting drill pipe 5 and the spiral blades 17, it is convenient for the slurry with surplus rock and soil particles to rise back to the outside of the drill hole along the gap between the device and the inner wall of the drill hole, forming a slurry wall protection system to avoid the collapse of the drill hole. The outer peripheral walls of the bottom drill pipe 1 and the connecting drill pipe 5 near the spiral blades 17 are both fixedly connected with limiting rings 4, and the cross section of the limiting ring 4 is right-angled triangular. Through the setting of the limiting ring 4, it is avoided that the rock and soil particles adhere to the connection between the connecting drill pipe 5 and the bottom drill pipe 1 during the rising process.

[0027] Working principle: When in use, first install the drill bit 2 at the bottom end of the bottom drill pipe 1, then insert the bottom grouting pipe 3 into the interior of the bottom drill pipe 1, so that the bottom end of the bottom grouting pipe 3 is fixedly connected to the limit plate 12. Then, through the mutual meshing between the internal thread end 9 of the grouting pipe and the external thread end 10 of the grouting pipe, the bottom grouting pipe 3 is threadedly connected to the connecting grouting pipe 8. Then, through the mutual meshing between the internal thread end 6 of the drill pipe and the external thread end 7 of the drill pipe, the bottom drill pipe 1 is threadedly connected to the connecting drill pipe 5. Then connect the top end of the connecting drill pipe 5 to the drive system, and fixedly connect the top end of the connecting grouting pipe 8 to the output end of the grouting system. Through the mutual cooperation between the connecting grouting pipe 8 and the bottom grouting pipe 3, pressurized water slurry is injected into the grouting reducing pipe 15. Then, through the setting of the grouting reducing pipe 15, the flow rate of the water slurry is further increased. Then, through the setting of the grouting holes 14, it is convenient for the pressurized water slurry to impact the surplus rock and soil particles inside the drill hole, so that the surplus rock and soil particles rise back to the outside of the drill hole along the gap between the device and the inner wall of the drill hole. Through the mutual cooperation between the bottom drill pipe 1, the connecting drill pipe 5 and the spiral blade 17, the rising efficiency of the rock and soil particles is further increased, forming a slurry retaining wall system, effectively avoiding the collapse of the drill hole and improving the anti-blocking effect of the device.

[0028] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "set", "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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drill rod for preventing borehole blockage, comprising a bottom drill rod (1), the bottom end of the bottom drill rod (1) being fixedly connected to a drill bit (2), characterized in that: It also includes an anti-blocking component arranged inside the bottom drill rod (1), and a connecting component is arranged at the top end of the bottom drill rod (1); The anti-blocking component comprises a bottom grouting pipe (3) inserted into the bottom drill rod (1), the bottom end of the bottom grouting pipe (3) is fixedly connected to a limit plate (12), and the outer peripheral wall of the limit plate (12) is fixedly connected to the inner peripheral wall of the bottom drill rod (1), a plurality of evenly distributed through holes (13) are provided at the bottom of the limit plate (12), and the top ends of the through holes (13) are fixedly connected to the bottom end of the bottom grouting pipe (3), the outer wall of the drill bit (2) is provided with a plurality of grouting holes (14), a grouting reducer (15) is fixedly connected between the top end of each grouting hole (14) and the bottom end of the through hole (13), and the top inner diameter of the grouting reducer (15) is larger than the bottom inner diameter, and a one-way valve (16) is installed inside each grouting hole (14).

2. A drill rod for preventing borehole blockage according to claim 1, characterized in that: The connection assembly comprises a drill rod external thread end (7) opened at the top end of the outer peripheral wall of the bottom drill rod (1); a connecting drill rod (5) is arranged at the top end of the bottom drill rod (1); and a drill rod internal thread end (6) meshing with the drill rod external thread end (7) is opened at the bottom end of the inner peripheral wall of the connecting drill rod (5).

3. A drill rod for preventing borehole blockage according to claim 2, characterized in that: The top end of the inner peripheral wall of the bottom grouting pipe (3) is provided with an internal threaded end (10) of the grouting pipe, the top end of the bottom grouting pipe (3) is provided with a connecting grouting pipe (8), and the bottom end of the outer peripheral wall of the connecting grouting pipe (8) is provided with an external threaded end (9) of the grouting pipe that meshes with the internal threaded end (10) of the grouting pipe.

4. A drill rod for preventing borehole blockage according to claim 1, characterized in that: An annular sealing strip (11) is fixedly connected to the top of the bottom drill rod (1), and the cross section of the annular sealing strip (11) is arranged in a triangular structure.

5. A drill rod for preventing borehole blockage according to claim 2, characterized in that: The outer peripheral wall of the bottom drill rod (1) and the outer peripheral wall of the connecting drill rod (5) are both fixedly connected with a spiral piece (17); the outer peripheral wall of the bottom drill rod (1) and the outer peripheral wall of the connecting drill rod (5) near the spiral piece (17) are both fixedly connected with a limit ring (4); and the cross section of the limit ring (4) is arranged in a right-angled triangle structure.

Images