Directional drilling pipe and directional drilling construction method
By using the first and second rotary drives in the directional drill pipe to drive the drill bit and the bent pipe to rotate respectively, the problem of increasing forward resistance when the drill bit deviates from the route is solved, and an efficient and rapid drilling process is achieved.
Patent Information
- Application Number
- CN202411871267.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-03-25
AI Technical Summary
During directional drilling, when the drill bit deviates from the preset route, the prior art needs to stop rotation and adjust the angle, resulting in an increase in forward resistance and a decrease in speed.
A directional drill pipe is designed, and the first and second rotary drives are used to drive the drill bit and the bent pipe to rotate respectively. The direction of the drill bit is adjusted by adjusting the rotation angle of the bent pipe, so as to keep the drill bit always rotating and reduce forward resistance.
It realizes efficient advancement when adjusting the direction of the drill bit, reduces forward resistance and maintains a faster forward speed.
Smart Images
Figure CN119686643A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of directional drilling, and in particular to a directional drilling pipe and a directional drilling construction method. Background Art
[0002] Directional drilling is a pipeline construction process, generally used in municipal pipeline construction. Directional drilling rigs are used to locate holes, expand holes, and pull back pipelines, so that pipelines can penetrate underground. Especially in rivers or roads, if a pipeline is to be buried from one side of the river or road to the other side, it is difficult to dig a trench directly from above to bury the pipeline, and it will damage the environment above. This situation is suitable for directional drilling technology. First, drill a hole on one side of the river or road. A directional drilling rig can be used to drill holes. A slender drill pipe with a drill bit is inserted obliquely into the ground from one side of the river or road. After each section of drill pipe is drilled, a machine is used to connect a section of drill pipe and push it obliquely into the ground. During this period, the drill bit continuously sprays drilling fluid and rotates to cut the soil layer, thereby continuously drilling the drill bit out from the other side of the river or road.
[0003] During directional drilling, the drill bit may deviate from the preset route. In this case, the drill bit needs to be adjusted in the forward direction to gradually return to the preset route. At present, the drill bit of a general directional drilling rig is an angled drill bit. When adjusting the drill bit direction, the drill bit is first stopped, and then the drill bit angle is adjusted. Then the drill bit stops rotating and is driven forward by the back thrust, so that the drill bit gradually returns to the preset route. However, since the drill bit cannot rotate during this process, it cannot cut the soil well, resulting in increased forward resistance and reduced forward speed. Summary of the invention
[0004] In view of the fact that the drill bit of a general directional drilling rig is an angled drill bit, when adjusting the direction of the drill bit, the thrust at the ground end is first paused, then the drill bit angle is adjusted, and then the drill bit stops rotating, and the back thrust at the ground end is restarted to drive the drill bit forward, thereby making the drill bit gradually return to the preset route. However, since the drill bit cannot rotate during this process and cannot cut the soil well, the forward resistance increases and the forward speed decreases. The present application proposes the following improvement plan.
[0005] In a first aspect, the present application proposes a directional drill pipe and adopts the following technical solution.
[0006] A directional drilling pipe comprises a drill bit, a first water pipe section, a first rotary drive machine, a first annular pipe, a connecting pipe, a second water pipe section, a second rotary drive machine, a second annular pipe, a bending pipe, a mounting pipe and a directional drilling instrument; The drill bit is rotatably mounted on the front end of the bending tube; the rear end of the bending tube is rotatably connected to the mounting tube; The front end of the first water section pipe has a nozzle; the first water section pipe is fixedly connected to the drill bit, and the nozzle is exposed; the first rotary drive motor is fixed in the bent pipe; the first drive shaft of the first rotary drive motor is coaxially fixed with the first water section pipe; the circumference of the first water section pipe has a first water hole; the first annular tube is sleeved on the circumference of the first water section pipe and connected to the first water hole; The second rotary drive motor is fixed in the mounting tube; the second drive shaft of the second rotary drive motor is coaxially fixed with the second water-section pipe and fixed to the bent tube; the second water-section pipe has a second water hole on its circumference; the second annular tube is sleeved on the circumference of the second water-section pipe and connected to the second water hole; The connecting pipe is connected to the first ring pipe and the second water section pipe; The directional drilling instrument is installed in the installation pipe or the bending pipe.
[0007] By adopting the above technical solution, when the drill bit deviates from the preset route, the ground pushing action can be stopped first, and then the second rotary drive motor can be started to turn the bending tube, that is, the drill bit is turned to a suitable angle, and then the second rotary drive motor is turned off, and the drill bit is gradually pushed to the preset route by relying on the backward push action of the ground, and then the second rotary drive motor is restarted. In the above adjustment process, the first rotary drive motor can always keep running, so that the drill bit continues to cut the soil, and the forward resistance will basically not increase due to the turning, and the forward speed can still be maintained at a relatively fast speed.
[0008] A preferred solution for the directional drilling pipe is that the first water hole includes a plurality of arc holes spaced apart on the same circle; an annular hole is provided on the inner side of the first ring sleeve; the annular hole faces the plurality of arc holes; sealing rings are installed on both sides of the annular hole on the inner side of the first ring sleeve; and two clamping rings are fixed on the first water-saving pipe, close to the two ends of the first ring sleeve.
[0009] By adopting the above technical solution, during the process of the first section of the water pipe rotating in the first ring sleeve, the multiple arc holes and the annular holes always remain connected, and the water or mud passes smoothly.
[0010] A preferred solution of the directional drill pipe is that the directional drill pipe also includes a first battery and a first controller, both of which are installed in the bending tube; the first battery is connected to the first controller; and the first controller is connected to the first rotary drive machine.
[0011] By adopting the above technical solution, the first rotary drive machine is powered by a battery, and there is no need to use an external power supply with wires, so the power supply is convenient and the structure is simple.
[0012] A preferred solution for the directional drill pipe is that the directional drill pipe also includes a second battery and a second controller, both of which are installed in the mounting tube; the second battery is connected to the second controller; the second controller is connected to the second rotary drive machine; the drilling directional instrument is installed in the mounting tube; and the second battery is also connected to the drilling directional instrument.
[0013] By adopting the above technical solution, the second rotary drive machine is powered by a battery, and there is no need to use an external power supply with wires, so the power supply is convenient and the structure is simple.
[0014] A preferred solution for the directional drilling pipe is that the directional drilling pipe also includes a water inlet pipe; one end of the water inlet pipe is connected to the second annular pipe, and the other end is expanded to completely fit the inner circumferential wall of the mounting pipe; the end of the mounting pipe away from the bending pipe is a rear end with an internal thread; the expanded end of the water inlet pipe is closer to the rear end of the mounting pipe than the directional drilling instrument, the second rotary drive machine, the second battery and the second controller.
[0015] By adopting the above technical solution, the rear end of the installation pipe as a whole becomes the slurry inlet end. When the push-pull pipe is connected to the rear end of the installation pipe one after another, there is no need to connect other water pipes. The slurry supply structure is simple and the construction is convenient.
[0016] A preferred solution of the directional drilling pipe is that the directional drilling pipe also includes multiple push-back tubes; the front end of each push-back tube is provided with an internal thread, and the rear end is provided with an external thread, and the front end of each push-back tube can be adaptably screwed into the rear end of another push-back tube.
[0017] By adopting the above technical solution, the push-back pipe installed at the rear is threadedly connected to the front pipe, which can form a slurry supply line. The firm structure of the threaded connection also enables the push-back pipe connected at the rear to act as a force transmission member to push the front pipe and drill bit forward.
[0018] A preferred solution of the directional drilling pipe is that a sealing ring is provided on the end face of the rear end of the other rear end of the push back pipe where the front end of the push back pipe abuts against the rear end of the other push back pipe.
[0019] By adopting the above technical solution, the rear push pipe installed at the rear and the front pipeline form a sealed connection, and there is basically no leakage at the connection, maintaining efficient slurry supply.
[0020] On the second aspect, the present application also proposes a directional drilling construction method and adopts the following technical solution.
[0021] A directional drilling construction method is performed using the directional drilling pipe as described above, and the directional drilling construction method comprises: The directional drill pipe is pushed by a directional drill rig in such a way that the drill bit is tilted toward the ground, and the rear end of the directional drill pipe is driven obliquely into the ground. During the driving process, the first rotary drive machine and the second rotary drive machine are started, and mud is continuously introduced into the rear end of the installation pipe. After only the rear end of the installation pipe is exposed above the ground, stop introducing mud into the rear end of the installation pipe, stop advancing the directional drilling pipe, screw one of the push-back pipes into the rear end of the installation pipe, and screw the front end of another push-back pipe into the rear end of each push-back pipe each time, and introduce mud into the rear end of the push-back pipe each time after the push-back pipe is screwed in and tightened; During the process of continuously pushing the drill bit into the ground, the position of the drill bit and the rotation angle of the bent tube measured by the directional drilling instrument are as follows: if the drill bit does not deviate from the preset route, the first rotary drive machine and the second rotary drive machine are kept turned on and the push-back tube is pushed forward; if the position of the drill bit deviates from the preset route, the push-back tube is stopped from being pushed forward, the first rotary drive machine is kept turned on, the second rotary drive machine adjusts the bent tube to the angle of the drill bit toward the preset route, and then the second rotary drive machine is turned off, the first rotary drive machine is kept turned on and the push-back tube is pushed forward again until the drill bit returns to the preset route, the first rotary drive machine is kept turned on and the second rotary drive machine is turned on again and the push-back tube is pushed forward; Continue to connect another push-back tube to the rear end of the front push-back tube, and continue to push the rear push-back tube installed underground until the drill bit at the front end is exposed to the ground, thus completing the directional drilling.
[0022] By adopting the above technical solution, the drill bit can be kept rotating when the direction of the drill bit is adjusted, thereby maintaining the efficiency of efficient advancement.
[0023] In summary, the directional drilling pipe and directional drilling construction method of the present application have the following beneficial effects: when the drill bit deviates from the preset route, the ground propulsion action can be stopped first, and then the second rotary drive machine is started to turn the bending tube, that is, the drill bit is turned to a suitable angle, and then the second rotary drive machine is turned off, and the drill bit is gradually pushed to the preset route by relying on the backward push action of the ground, and then the second rotary drive machine is restarted. In the above adjustment process, the first rotary drive machine can always keep running, so that the drill bit continues to cut the soil, and the forward resistance will basically not increase due to the turning, and the faster forward speed is still maintained. The rotary drive machine is powered by a battery, and there is no need to use an external power supply with wires, which is convenient for power supply and simple in structure. The rear push pipe installed at the back directly becomes a slurry pipe, and the rear push pipe installed at the back forms a sealed connection with the front pipe. The connection is basically leak-free, and efficient slurry supply is maintained. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1This is the first structural diagram of the directional drilling pipe.
[0025] Figure 2 for Figure 1 Cross-sectional view of a directional drill pipe.
[0026] Figure 3 This is the structural diagram of the first section of water pipe in the directional drilling pipe.
[0027] Figure 4 for Figure 1 Another perspective view of the directional drill pipe.
[0028] Figure 5 This is a partial structural diagram of the first ring pipe and the connecting pipe in the directional drilling pipe.
[0029] Figure 6 This is the second structural diagram of the directional drilling pipe.
[0030] Figure 7 for Figure 6 Structural diagram of the push-back tube in the directional drilling tube.
[0031] Figure 8 Schematic diagram of a directional drill driving a directional drill pipe to drill a hole from one side of the road to the other.
[0032] Figure numerals: 1, drill bit; 2, bending pipe; 3, installation pipe; 4, first water pipe section; 5, first annular pipe; 6, first box; 7, connecting pipe; 8, second water pipe section; 9, second annular pipe; 10, second box; 11, directional drilling instrument; 12, first rotary drive motor; 13, first controller; 14, first battery; 15, second rotary drive motor; 16, second controller; 17, second battery; 401, nozzle; 402, first water hole; 501, annular hole; 18, sealing ring; 403, clamping ring; 19, connecting rod; 20, water inlet pipe; 21, push-back pipe; 211, shrink stud. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0034] like Figure 1 A directional drilling pipe includes an external drill bit 1, a bending pipe 2 and a mounting pipe 3, wherein the drill bit 1 is rotatably mounted on the front end of the bending pipe 2, and the rear end of the bending pipe 2 is rotatably connected to the front end of the mounting pipe 3. The rear end of the mounting pipe 3 is an interface with an internal thread.
[0035] like Figure 2 The directional drilling pipe also includes a first water pipe section 4, a first annular pipe 5, a first box 6, a connecting pipe 7, a second water pipe section 8, a second annular pipe 9, a second box 10, a directional drilling instrument 11, and a first rotary drive motor 12, a first controller 13 and a first battery 14 in the first box 6, and also includes a second rotary drive motor 15, a second controller 16 and a second battery 17 in the second box 10.
[0036] The first box 6 is fixed in the bending tube 2. The first battery 14 supplies power to the first controller 13 and the first rotary drive machine 12, and no external wires are required. The structure is simple, which is conducive to the directional drilling pipe to drill deep underground. The first controller 13 is connected to the first rotary drive machine 12, and a wireless transmitter can be installed on the first controller 13 to facilitate ground personnel or a control system to control the action of the first rotary drive machine 12.
[0037] Similarly, the second box 10 is fixed in the mounting tube 3. The second battery 17 supplies power to the second controller 16 and the second rotary drive machine 15, and no external wires are required. The structure is simple, which is conducive to the directional drilling pipe to drill deep underground. The second controller 16 is connected to the second rotary drive machine 15, and a wireless transmitter can be installed on the second controller 16 to facilitate ground personnel or a control system to control the action of the second rotary drive machine 15.
[0038] The directional drilling instrument 11 is installed in the installation tube 3 and connected to the second battery 17. During the drilling process, the directional drilling instrument 11 (probe) can transmit the information of the direction of the drill bit 1 obtained by the probe in the hole to the ground indicating instrument via electromagnetic waves at any time, so that the ground personnel can obtain the direction information of the drill bit 1 and adjust the drill bit 1 to the predetermined route in time, so as to realize accurate and efficient control of the drilling direction.
[0039] like Figure 2 For the aforementioned bending tube 2 that can be rotatably connected to the mounting tube 3, it can be that the rear end of the bending tube 2 has a shrinking ring, the front end of the mounting tube 3 has an expanding ring, the shrinking ring is sleeved on the expanding ring, the second rotary driving machine 15 is installed in the mounting tube 3, the second rotating axis of the second rotary driving machine 15 is fixed to the inner wall of the bending tube 2, the bending tube 2 has a pipe section that is coaxial with the mounting tube 3, and under the drive of the second rotary driving machine 15, the pipe section of the bending tube 2 can rotate coaxially relative to the mounting tube 3, so that the bending tube 2 can be rotatably connected to the mounting tube 3.
[0040] The drill bit 1 can be a petal shape surrounded by three metal petals to efficiently cut and stir the soil. The drill bit 1 has a chassis for the three metal petals to be installed and fixed. The chassis is fixed on the front end of the first water pipe 4.
[0041] like Figure 3The first section of the water pipe 4 is cylindrical, and a nozzle 401 protrudes from the middle of its front end plane, and the chassis of the drill bit 1 is fixed on the front end plane.
[0042] like Figure 4 The nozzle 401 passes through the center of the three metal petals, and the side wall of the nozzle 401 and the chassis can be sealed and connected, so that the nozzle 401 can spray mud or water forward to flush the soil, cooperate with the three metal petals to cut the soil, and apply thrust at the rear end of the installation pipe 3 to push the directional drilling pipe forward. In this process, the soil becomes mud and flows out of the drilled hole in the opposite direction along the outer wall of the bending pipe 2 and other pipe bodies.
[0043] The first rotary drive machine 12 may be a motor, and its first rotary shaft is fixed to the rear end of the first water pipe section 4. The first rotary shaft is coaxially arranged with the first water pipe section 4. The chassis of the drill bit 1 is sleeved on the front end of the bent pipe 2, and the first rotary drive machine 12 drives the first water pipe section 4 to rotate, so that the drill bit 1 rotates, that is, the drill bit 1 is rotatably installed on the front end of the bent pipe 2.
[0044] The first annular tube 5 is adapted to be sleeved on the circumference of the first water pipe 4. Figure 3 The first water passage hole 402 is provided on the circumference of the first water pipe 4, for example, three arc-shaped holes spaced apart on the same circle. Figure 5 The inner wall of the first annular tube 5 is provided with an annular hole 501, which is opposite to the three arc holes, so that when the first rotary drive machine 12 drives the first water pipe 4 to rotate, the annular hole 501 and the three arc holes are always connected, so that the slurry can be continuously passed. The inner wall of the first annular tube 5 is provided with a sealing ring 18 on both sides of the annular hole 501 to maintain the sealing of the slurry. Figure 3 Two clamping rings 403 are fixed to the outer wall of the first water pipe section 4, which are respectively located at the two ends of the first ring pipe 5 to limit the axial movement of the first ring pipe 5 so that the annular hole 501 is always opposite to the first water hole 402.
[0045] like Figure 2, the connection structure between the second annular tube 9 and the second water section pipe 8 is the same as the connection structure between the first annular tube 5 and the first water section pipe 4. For example, the second annular tube 9 is adapted to be sleeved on the circumference of the second water section pipe 8, and a second water hole is opened on the circumference of the second water section pipe 8, and the water hole is three-section arc holes with the same circle; the inner circumferential wall of the second annular tube 9 is opened with an annular hole 501, and the annular hole 501 is directly opposite to the three arc holes, so that when the second rotary drive machine 15 drives the second water section pipe 8 to rotate, the annular hole 501 and the three arc holes are always connected, so that it can continue to pass slurry. The inner annular wall of the second annular tube 9 is embedded with a sealing ring 18 on the upper and lower sides of the annular hole 501 to maintain the sealing of the slurry. The outer wall of the second water section pipe 8 is also fixed with two clamping rings 403, which are respectively located at the two ends of the second annular tube 9 to limit the axial movement of the second annular tube 9, so that the annular hole 501 is always directly opposite to the second water hole.
[0046] like Figure 2 , the second rotary drive machine 15 can be a motor, and its second rotary shaft is fixed to the rear end of the second water pipe section 8. The second water pipe section 8 can be cylindrical, and the second rotary shaft and the second water pipe section 8 are coaxially fixed to each other, for example, the second water pipe section 8 replaces the middle section of the second rotary shaft. The second rotary shaft has a bending rod section with a bending angle equal to that of the bending tube 2. The angle of the bending tube 2 and the bending rod section after bending can be 170°~175°, which is the angle between the two sections of the tube or the two sections of the rod. In contrast, the angle between the two sections of the tube or the two sections of the rod of the straight tube or the straight rod is 180°. The bending rod section of the second rotary shaft is fixed to the inner wall of the bending tube 2.
[0047] The two ends of the pipe 7 are connected to the first ring pipe 5 and the second water pipe 8 respectively. The first box 6 and the inner wall of the bending pipe 2 are connected and fixed by a connecting rod 19. The bending rod section of the second rotating shaft and the inner wall of the bending pipe 2 are connected and fixed by a connecting rod 19. The pipe 7 passes through the sides of the connecting rod 19 at these two places. Since the pipe 7 can rotate relative to the first water pipe 4, and the pipe 7 can be driven to rotate synchronously with the first box 6, the bending rod section and the bending pipe 2 by the second rotation drive machine 15, the setting does not cause interference.
[0048] like Figure 2 For the second annular tube 9, a structure of an external water source (or mud or other lubricating fluids, etc.) is that the directional drilling pipe also includes a water inlet pipe 20. One end of the water inlet pipe 20 is connected to the second annular tube 9, and the other end is expanded to fit the inner circumferential wall of the mounting tube 3, and the expanded end is closer to the rear end of the mounting tube 3 than the directional drilling instrument 11, the second rotary drive machine 15, the second battery 17 and the second controller 16, so that these machines at the rear end will not be sprayed with water or mud.
[0049] like Figure 6The directional drilling pipe also includes multiple push-back tubes 21. The front end of each push-back tube 21 is a shrinking stud 211 with external threads, and the rear end is an interface with internal threads that is the same as the mounting tube 3. The front end of a push-back tube 21 can be threadedly connected to the rear end of the mounting tube 3, and can also be threadedly connected to the rear end of another push-back tube 21.
[0050] like Figure 7 In order to enhance the connection sealing of the front and rear pipes, a preferred embodiment is that each rear push tube 21 has a circular end face at the front end, and the circular end face is located on the circumferential side of the shrinking stud 211. A sealing ring 18 is embedded on the circular end face. When the rear push tube 21 is threadedly connected to the rear end of the mounting tube 3 or the rear end of another rear push tube 21, the sealing ring 18 is tightened by screwing the threads so that the sealing ring 18 abuts against the end face of the rear end of the mounting tube 3 or the rear end of another rear push tube 21, forming a sealed connection and reducing the possibility of leakage.
[0051] It should be noted that the water pipes, water holes, etc. named in this application can be used for passing water, mud, and other types of lubricating fluids, etc.
[0052] like Figure 8 The present application also proposes a directional drilling construction method, which is implemented using the above-mentioned directional drilling pipe. The gist of the directional drilling construction method is as follows: A directional drill is used to tilt the directional drill pipe with the drill bit 1 tilted toward the ground. The directional drill pushes the rear end of the directional drill pipe and drives the directional drill pipe into the ground at an angle. During the driving process, the first rotary drive machine 12 and the second rotary drive machine 15 are started, and mud is continuously introduced into the rear end of the installation pipe 3. The mud is sprayed from the front nozzle 401 onto the soil to soak the soil. The rotating drill bit 1 cuts and stirs the soaked soil to become mud. The mud flows out of the drilled hole from the side of the directional drill pipe in the opposite direction.
[0053] After only the rear end of the installation pipe 3 is exposed above the ground, stop introducing mud into the rear end of the installation pipe 3, screw a push-back pipe 21 into the rear end of the installation pipe 3, and then reintroduce mud. Then, push the directional drill pipe (including the drill bit 1) again until only the rear end of the push-back pipe 21 is exposed above the ground. Each time, screw the front end of another push-back pipe 21 into the rear end of each push-back pipe 21. After each push-back pipe 21 is screwed in and tightened, introduce mud into the rear end of the push-back pipe 21.
[0054] In the process of advancing the directional drilling pipe, the drill bit 1 needs to be turned so that the drill bit 1 first drills obliquely downward into the ground, and then gradually changes direction to drill obliquely upward to the ground on the other side. The principle of achieving steering in this process is: when only the first rotary drive machine 12 is turned on, the bending tube 2 does not rotate, and the forward direction of the directional drilling pipe follows the bending direction of the bending tube 2; when the first rotary drive machine 12 and the second rotary drive machine 15 are turned on at the same time, the bending tube 2 rotates in real time, the bending tube 2 is isotropic, and the forward direction of the directional drilling pipe follows the axial direction of the rotation of the bending tube 2, that is, the axial direction of the installation tube 3. According to the above principle, the process of the drill bit 1 drilling obliquely downward from one side of the ground and drilling obliquely upward from the other side of the ground can be realized.
[0055] The above drilling process may deviate. The following measures can be used to adjust the trajectory and return it to the preset route.
[0056] During the process of continuously pushing the drill bit 1 into the ground, the directional drilling instrument 11 measures the position of the drill bit 1 and the rotation angle of the bending tube 2: if the drill bit 1 does not deviate from the preset route, the first rotary drive machine 12 and the second rotary drive machine 15 are kept turned on and the push-back tube 21 is pushed forward; if the position of the drill bit 1 deviates from the preset route, the push-back tube 21 is stopped from being pushed forward, the first rotary drive machine 12 is kept turned on, the second rotary drive machine 15 adjusts the bending tube 2 to the angle of the drill bit 1 toward the preset route, and then the second rotary drive machine 15 is turned off, the first rotary drive machine 12 is kept turned on and the push-back tube 21 is pushed forward again until the drill bit 1 returns to the preset route, the first rotary drive machine 12 is kept turned on and the second rotary drive machine 15 is reopened and the push-back tube 21 is pushed forward.
[0057] Another rear push tube 21 is continuously connected to the rear end of the front rear push tube 21, and the rear push tube 21 installed at the rear is continuously pushed underground until the drill bit 1 at the front end is exposed to the ground, thereby completing the directional drilling.
[0058] In summary, in the directional drilling pipe and directional drilling construction method of the above embodiments, when the direction of the drill bit 1 is adjusted, the drill bit 1 can keep rotating in real time, so that the foam soil can be continuously cut and stirred, and the forward resistance will basically not increase due to the turning, and a relatively fast forward speed can be maintained.
[0059] Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A directional drilling pipe, characterized in that: It comprises a drill bit (1), a first water pipe section (4), a first rotary drive machine (12), a first annular pipe (5), a connecting pipe (7), a second water pipe section (8), a second rotary drive machine (15), a second annular pipe (9), a bending pipe (2), a mounting pipe (3) and a directional drilling instrument (11); The drill bit (1) is rotatably mounted on the front end of the bending tube (2); the rear end of the bending tube (2) is rotatably connected to the mounting tube (3); The front end of the first water-section pipe (4) is provided with a nozzle (401); the first water-section pipe (4) and the drill bit (1) are fixedly connected, and the nozzle (401) is exposed; the first rotary drive motor (12) is fixed in the bent pipe (2); the first drive shaft of the first rotary drive motor (12) and the first water-section pipe (4) are coaxially fixed; the circumferential side of the first water-section pipe (4) is provided with a first water hole (402); the first annular tube (5) is sleeved on the circumferential side of the first water-section pipe (4) and is connected to the first water hole (402); The second rotary drive motor (15) is fixed in the mounting tube (3); the second drive shaft of the second rotary drive motor (15) is coaxially fixed to the second water-section pipe (8) and fixed to the bent tube (2); the second water-section pipe (8) has a second water hole on its circumferential side; the second annular tube (9) is sleeved on the circumferential side of the second water-section pipe (8) and is connected to the second water hole; The connecting pipe (7) is connected to the first ring pipe (5) and the second water-saving pipe (8); The directional drilling instrument (11) is installed in the installation tube (3) or the bending tube (2).
2. The directional drilling pipe according to claim 1, characterized in that: The first water-through hole (402) comprises a plurality of arc-shaped holes arranged at intervals on the same circle; an annular hole (501) is provided on the inner side surface of the first ring sleeve; the annular hole (501) is directly opposite to the plurality of arc-shaped holes; a sealing ring (18) is installed on both sides of the annular hole (501) on the inner side surface of the first ring sleeve; and two clamping rings (403) are also fixed on the first water-saving pipe (4) and are close to the two ends of the first ring sleeve.
3. The directional drilling pipe according to claim 1, characterized in that: The directional drilling pipe further comprises a first battery (14) and a first controller (13), both of which are installed in the bending tube (2); the first battery (14) is connected to the first controller (13); and the first controller (13) is connected to the first rotary drive machine (12).
4. The directional drilling pipe according to claim 1, characterized in that: The directional drilling pipe further comprises a second battery (17) and a second controller (16), both of which are installed in the mounting pipe (3); the second battery (17) is connected to the second controller (16); the second controller (16) is connected to the second rotary drive machine (15); the directional drilling instrument (11) is installed in the mounting pipe (3); and the second battery (17) is also connected to the directional drilling instrument (11).
5. The directional drilling pipe according to claim 4, characterized in that: The directional drilling pipe further comprises a water inlet pipe (20); one end of the water inlet pipe (20) is connected to the second annular pipe (9), and the other end is expanded to completely fit the inner circumferential wall of the mounting pipe (3); the end of the mounting pipe (3) away from the bent pipe (2) is a rear end having an internal thread; the expanded end of the water inlet pipe (20) is closer to the rear end of the mounting pipe (3) than the directional drilling instrument (11), the second rotary drive machine (15), the second battery (17) and the second controller (16).
6. The directional drilling pipe according to claim 5, characterized in that: The directional drilling pipe also includes a plurality of push-back pipes (21); the front end of each push-back pipe (21) is provided with an internal thread, and the rear end is provided with an external thread, and the front end of each push-back pipe (21) can be adapted to be screwed into the rear end of another push-back pipe (21).
7. The directional drilling pipe according to claim 6, characterized in that: The front end of the rear push tube (21) abuts against the end surface of the rear end of the other rear push tube (21), and a sealing ring (18) is provided.
8. A directional drilling construction method, performed using the directional drilling pipe according to claim 6 or 7, characterized in that: The directional drilling construction method comprises: A directional drilling machine is used to push the rear end of the directional drilling pipe with the drill bit (1) tilted toward the ground, and the directional drilling pipe is driven obliquely into the ground. During the driving process, the first rotary drive machine (12) and the second rotary drive machine (15) are started, and mud is continuously introduced into the rear end of the installation pipe (3); After only the rear end of the installation pipe (3) is exposed above the ground, the mud is stopped from being introduced into the rear end of the installation pipe (3), the directional drilling pipe is stopped from being pushed forward, a push-back pipe (21) is screwed into the rear end of the installation pipe (3), and the front end of another push-back pipe (21) is screwed into the rear end of each push-back pipe (21) each time, and after each push-back pipe (21) is screwed in and tightened, the mud is introduced into the rear end of the push-back pipe (21); During the process of continuously pushing the drill bit (1) into the ground, the position of the drill bit (1) and the rotation angle of the bent tube (2) measured by the directional drilling instrument (11) are as follows: if the drill bit (1) does not deviate from the preset route, the first rotary drive machine (12) and the second rotary drive machine (15) are kept turned on and the push-back tube (21) is pushed forward; if the position of the drill bit (1) deviates from the preset route, the push-back tube (21) is stopped from being pushed forward, the first rotary drive machine (12) is kept turned on, the second rotary drive machine (15) adjusts the bent tube (2) to the angle at which the drill bit (1) faces the preset route, and then the second rotary drive machine (15) is turned off, the first rotary drive machine (12) is kept turned on and the push-back tube (21) is pushed forward again until the drill bit (1) returns to the preset route, the first rotary drive machine (12) is kept turned on and the second rotary drive machine (15) is turned on again and the push-back tube (21) is pushed forward; Another rear push tube (21) is continuously connected to the rear end of the front rear push tube (21), and the rear push tube (21) installed at the rear is continuously pushed underground until the drill bit (1) at the front end is exposed above the ground, thereby completing the directional drilling.