A vortex-vibration downhole power tool for deep drilling

Abstract

The present invention discloses a deep-earth drilling vortex-shock downhole power tool, which belongs to the technical field of drilling equipment. The drill pipe is coaxially rotatably installed in a protective tube, the drill bit is exposed outside the bottom end of the protective tube, a tube is coaxially fixedly installed outside the protective tube, a turbine located in the tube is coaxially rotatably installed on the protective tube, a connecting tube is coaxially fixed on the top surface of the turbine blade, the tube wall of the connecting tube is provided with a perforation, and the side wall of the tube at the height position corresponding to the perforation is provided with a slurry discharge hole. A turntable is coaxially fixed to the top of the connecting tube, a plurality of first through holes are provided on the turntable, a closing disk fixed to the inner wall of the tube is provided on the upper end surface of the turntable, a plurality of second through holes are provided on the closing disk, and an impact piece is vertically elastically installed above the turntable; the mud drilled out by the drill bit drives the turbine to rotate and drives the turntable to rotate, and drives an impact piece to fall and rebound to hit the drill pipe. The present invention has a strong drilling ability, a compact structure, and is convenient to use underground.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, and in particular to a vortex-shock downhole power tool for deep drilling. Background Art

[0002] Downhole power drilling tools refer to bottom hole drilling tools that can convert the energy of drilling fluid into drilling and rock breaking power. Due to the high rotation speed of downhole power drilling tools, the mechanical drilling speed can be significantly improved, especially when used in conjunction with PDC drill bits, the drilling speed will be greatly improved.

[0003] Compared with traditional rotary drilling, downhole power drilling tools have great advantages in improving mechanical drilling speed, increasing the footage of a single drill bit, reducing the cost per meter of drilling, achieving directional control of the wellbore trajectory and quickly and accurately hitting the target, as well as ensuring the quality of the wellbore and drilling safety. In developed Western countries, downhole power drilling tools have been identified as one of the best drilling tools for directional wells, cluster wells, high-angle wells, horizontal wells and emergency rescue wells. With the important progress made in the application of new oil and gas drilling technologies in my country, directional wells, horizontal wells, and multi-branch well technologies have improved the success rate and benefits of drilling, and promoted the development and application of downhole power drilling tools. In addition, technologies such as small hole drilling, casing window sidetracking, rotary steerable drilling, and continuous tubing drilling have also been developed and utilized to a certain extent, and downhole power drilling tools are also required to have corresponding development.

[0004] The currently commonly used single-screw drill tools and electric drill tools have great limitations on torque output during drilling due to the constraints of their own driving structures. Therefore, axial pressure supplementary propulsion is used to increase the drilling force. If the axial drilling speed needs to be accelerated, an additional hydraulic drive needs to be set up, and the drill tool needs to be axially pushed by pump pressure to promote more efficient drilling of the drill tool. Therefore, the structure is relatively complex, and the pump pressure equipment and its piping system will also make the drill tool itself larger. As a downhole drilling tool, it is extremely inconvenient to operate and use, and has great limitations. Summary of the invention

[0005] In view of the introduction to the above technical status quo, the purpose of the present invention is to provide a deep drilling vortex seismic downhole power tool to better solve the technical problems that during downhole drilling operations, the drilling tools occupy a large area due to the large number of supporting equipment, are inconvenient to operate and use, and have poor adaptability.

[0006] To achieve the above-mentioned purpose, a deep drilling vortex seismic downhole power tool of the present invention comprises a drill bit and a drill rod on which the drill bit is fixedly mounted, and a coaxially arranged turbine, wherein the drill rod is coaxially rotatably mounted in a protective tube, the drill bit is exposed outside the bottom end of the protective tube, a tube is coaxially fixedly mounted outside the protective tube, the turbine located in the tube is coaxially rotatably mounted on the protective tube, a connecting tube is coaxially fixed on the top end surface of the turbine blades, a tube wall is provided with a through hole, and a slurry discharge hole is provided on the side wall of the tube at a height corresponding to the through hole.

[0007] A rotating disk is coaxially fixed to the top of the connecting tube, the rotating disk is provided with a plurality of first through holes, the upper end surface of the rotating disk is provided with a closing disk fixed to the inner wall of the tube, the closing disk is provided with a plurality of second through holes, and an impact piece is vertically and elastically installed above the rotating disk;

[0008] When the mud drilled out by the drill bit washes the turbine upward through the slurry delivery gap between the tube and the protective tube, the turbine rotates and drives the turntable to rotate. During the rotation of the turbine, the first through hole and the second through hole are connected to each other, or the through hole is connected to the slurry discharge hole, and when the two through holes are connected, the mud impacts the impact piece to make it move upward in the tube, and when the two through holes are not connected, the mud is discharged through the through hole and the slurry discharge hole in turn, and at the same time, the impact piece falls and rebounds to hit the drill pipe.

[0009] Furthermore, the via holes are arranged in a circular array on the rotating disk and the closing disk, so that each time the rotating disk rotates by a set angle relative to the closing disk, the first via holes and the second via holes can be aligned and connected with each other.

[0010] Furthermore, the bottom end of the protective tube is a truncated cone structure with the small end facing upward, and the bottom end surface is in smooth contact with the fixed end surface of the drill bit. The bottom end of the drill rod passes through the truncated cone structure and is fixed to the center of the top end of the drill bit.

[0011] Furthermore, the bottom end of the tube has a bell mouth with a large port facing downward, and the taper of the bell mouth is consistent with the taper of the truncated cone-shaped structure.

[0012] Furthermore, a conical cover is provided at the lower end of the outer wall of the tube, with the large end of the conical cover facing downward, and the diameter of the cover edge of the conical cover is consistent with the drilling diameter of the drill bit, and a slurry inlet channel inclined upward is provided in the conical cover.

[0013] Furthermore, the cover edge of the conical cover has rounded corners; and the diameter of the protective tube near the turbine gradually increases.

[0014] Furthermore, the rotating disk is coaxially rotatably sleeved on the outside of the protective tube and is dynamically sealed therewith; the closing disk is coaxially fixed on the protective tube, and the cylindrical side wall of the closing disk is fixed on the inner wall of the tube.

[0015] Furthermore, a shaft sleeve is coaxially fixed to the top end of the closing disk, and the shaft sleeve is coaxially rotatably mounted on the drill rod, and the drill rod and the shaft sleeve can also be axially slidably matched.

[0016] Furthermore, the impact piece includes a bottle cap-shaped sliding cover with an opening facing downward, the sliding cover is axially slidably sleeved on the drill rod, and can contact the shaft ring on the drill rod; a sliding block is fixed to the outer wall of the sliding block, and the sliding block is vertically slidably installed in a strip slide groove opened on the inner wall of the tube, the strip slide groove is connected to a circular installation cavity, and a pressure-resistant spring is vertically installed in the installation cavity, and the bottom end of the pressure-resistant spring is in contact with the sliding block.

[0017] Furthermore, the top of the strip slide groove is lower than the top of the installation cavity; the top wall of the sliding cover is provided with a plurality of first slurry outlet holes, and the top of the tube is provided with a second slurry outlet hole connected with the first slurry outlet holes.

[0018] Beneficial effect: When the deep drilling vortex-seismic downhole power tool of the present invention is performing directional drilling operations, the upwelling drilling slurry (mud, etc.) is used to drive the turbine. The rotation of the turbine causes the mud to be intermittently sprayed onto the impact piece, and when sprayed onto the impact piece, the mud is ejected through the impact piece as the only path. Because the perforations and the slurry discharge holes are not interconnected at this time, the pressure is extremely high, which generates a large impact load on the impact piece, allowing the pressure-resistant spring to fully store energy. Then, when the mud flow direction changes, a huge axial impact is instantly generated and applied to the drill pipe. The resulting axial high-frequency shock load can also effectively reduce the support pressure phenomenon and improve the directional operation efficiency of directional wells and horizontal wells.

[0019] In addition, the energy utilization rate of this deep drilling vortex seismic downhole power tool is high. Compared with the existing drilling tools that simply use additional pump pressure to apply axial vibration force, it has a compact structure, occupies a small area, is more convenient for underground operations, and does not have the risk of high-pressure operations that may exist when using pump pressure. It is safer to use and the energy utilization is more sufficient and ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following are auxiliary illustrations for explaining some specific embodiments of the present invention. The drawings described are mainly the principles of the specific operation execution structures or methods of some embodiments of the present invention. However, this does not mean that the physical structure or operation steps of the present invention can only be as shown in the drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 A top view of a turbine with a connecting cylinder fixed thereto;

[0023] Figure 3 is a schematic diagram of the end face of the rotating disk;

[0024] Figure 4 for Figure 1 Enlarged structural diagram of point A in the middle.

[0025] Explanation of component numbers: drill bit 1, drill rod 2, protective tube 3, turbine 4, blade 401, connecting tube 5, slurry discharge hole 6, through hole 7, tube 8, turntable 9, closing disk 10, sliding cover 11, bell mouth 12, frustum-shaped structure 13, conical cover 14, slurry inlet channel 15, first through hole 16, bushing 17, slider 18, mounting cavity 19, pressure-resistant spring 20, strip slide groove 21, shaft ring 22, first slurry outlet hole 23, second slurry outlet hole 24, slurry delivery gap B. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be fully described below, and some core features of the embodiments will be specifically shown in the accompanying drawings, wherein the same or similar reference numerals in the drawings represent the same or similar technical features, or structures or steps or processes with similar functions. Other embodiments replaced by ordinary technicians based on these embodiments without the need for creative work also belong to the protection scope of the present invention.

[0027] See also Figure 1 A deep drilling vortex-seismic downhole power tool shown in the figure, in terms of its main structure, first includes a drill bit 1 and a drill rod 2 on which the drill bit 1 is fixedly installed, and a coaxially arranged turbine 4. One of the key structural designs is that the drill rod 2 of this embodiment is coaxially rotatably installed in a protective tube 3, and the drill bit 1 is exposed outside the bottom end of the protective tube 3 for drilling. On the outside of the protective tube 3 in this embodiment, a tube barrel 8 is coaxially fixedly installed therewith. The two are arranged at intervals and fixed as a whole. When necessary, a separate axial driving force can be applied to move the tube barrel 8 downward and use it as a drill barrel to assist the drill bit 1 in fine drilling of the already drilled hole. Usually, the tube barrel 8 is allowed to move downward with the drill bit 1. Another key structure is that the turbine 4 located in the tube barrel 8 is coaxially rotatably installed on the protective tube 3, refer to it together. Figure 2 A connecting tube 5 is coaxially fixed on the top surface of the blade 401 of the turbine 4. The connecting tube 5 can be made thinner. Accordingly, a perforation 7 must be provided on the wall of the connecting tube 5 to allow the drilled mud to flow out. Moreover, a slurry discharge hole 6 is provided on the side wall of the tube 8 at a height position corresponding to the perforation 7. The purpose is to achieve slurry discharge to the outside when the two are aligned. In addition, the other two core components are the turntable 9 and the impact piece. Specifically, as Figure 1-Figure 2A turntable 9 is coaxially fixed at the top of the connecting tube 5, and a plurality of first through holes 16 are provided on the turntable 9 for the mud to enter and exit. A closing disk 10 fixed to the inner wall of the tube 8 is provided on the upper end surface of the turntable 9. When the two disks are assembled, they maintain a close contact and preferably a smooth contact, and a plurality of second through holes are provided on the closing disk 10 to facilitate the mud to enter and exit, mainly to discharge the mud; above the turntable 9 mentioned above, an impact piece is specially installed vertically and elastically. This impact piece is axially elastically slidably installed, that is, when it receives thrust, it can elastically move upward, and when the thrust disappears or decreases, it moves downward and resets accordingly, thereby causing an axial impact load on the drill pipe 2.

[0028] More specifically, in this embodiment, when working, when the mud drilled out by the drill bit 1 flushes the turbine 4 upward through the slurry delivery gap B between the tube 8 and the protective tube 3, the turbine 4 will rotate, and the rotation of the turbine 4 will drive the turntable 9 to rotate through the connecting tube 5, thereby achieving the misalignment and alignment of the two through holes, and the alignment and misalignment of the through hole 7 and the slurry discharge hole 6. Specifically, during the rotation of the turbine 4, the first through hole 16 and the second through hole are connected to each other, or the through hole 7 is connected to the slurry discharge hole 6, and these two connection states cannot occur at the same time, that is, in practice, either the first through hole 16 and the second through hole are connected to each other, and then impact the above-mentioned impact member, or the through hole 7 is connected to the slurry discharge hole 6, and then the impact member loses the impact of the mud and impacts the drill pipe 2 under the action of elasticity. In short, when the two through holes are connected, the mud impacts the impact piece to make it move upward in the tube 8, and when the two through holes are not connected, the mud is discharged through the perforation 7 and the slurry discharge hole 6 in sequence, and at the same time, the impact piece falls and rebounds to hit the drill pipe 2, forming a vibration impact drilling effect.

[0029] In the above embodiments, Figure 3 As shown, the above-mentioned through holes are arranged in a circular array on the turntable 9 and the closing disk 10, so that every time the turntable 9 rotates a set angle relative to the closing disk 10, the first through hole 16 and the second through hole can be aligned with each other and connected once. When the drill bit 1 continues to drill and the mud continues to surge, driving the turbine 4 to rotate continuously, this connection state will appear intermittently, and then cause the impact piece to intermittently and continuously impact the drill rod 2, giving the drill bit 1 an axial vibration impact force.

[0030] like Figure 1 As shown, the bottom end of the protective tube 3 is a truncated cone-shaped structure 13 with the small end facing upward, and the bottom end surface is in smooth contact with the fixed end surface of the drill bit 1. After the bottom end of the drill rod 2 passes through the truncated cone-shaped structure 13, it must be fixed to the top center of the drill bit 1, so that when drilling, the drilled mud can flow upward better, which is conducive to driving the turbine 4 to rotate. In order to consolidate this effect, in the specific implementation, Figure 1The bottom end of the tube 8 has a bell mouth 12 with a large end facing downward, and the taper of the bell mouth 12 is consistent with the taper of the truncated cone structure 13.

[0031] In order to gather and collect drilling slurry, Figure 1 A conical cover 14 is provided at the lower end of the outer wall of the tube 8, with the large end of the conical cover 14 facing downward, and the diameter of the cover edge of the conical cover 14 is consistent with the diameter of the hole drilled by the drill bit 1, so as to fully collect the mud, and a slurry inlet channel 15 inclined upward is provided in the conical cover 14, so as to feed the mud into the above-mentioned slurry delivery gap B. In addition, the cover edge of the conical cover 14 can be rounded so as to slide in contact with the inner wall of the hole drilled by the drill bit 1, and, during manufacturing, the diameter of the protective tube 3 near the turbine 4 is gradually increased to gradually reduce the above-mentioned slurry delivery gap B and enhance the impact force on the turbine 4.

[0032] like Figure 1 During installation, the rotary disc 9 is coaxially rotatably sleeved on the outside of the protective tube 3 and is dynamically sealed therewith, while the closing disc 10 is coaxially fixed on the protective tube 3, and the cylindrical side wall of the closing disc 10 is fixed on the inner wall of the tube 8. For axial sliding, a sleeve 17 can be coaxially fixed on the top of the closing disc 10, and the sleeve 17 is coaxially rotatably installed for the drill rod 2, and the drill rod 2 and the sleeve 17 can also be axially slidably matched.

[0033] In the above embodiments, specifically, the impact member is designed according to the following structure: Figure 4The sliding cover 11 mainly comprises a bottle cap-shaped sliding cover 11 with an opening facing downward, and preferably has a cylindrical protrusion in the center of the inner bottom to serve as a counterweight for impact vibration. The sliding cover 11 is axially slidably sleeved on the drill rod 2 and can contact the shaft ring 22 on the drill rod 2, so that when the impact piece slides axially, the shaft ring 22 squeezes the drill rod 2 to produce a vibration effect. In addition, a slider 18 is fixed to the outer wall of the sliding cover 11. The slider 18 is installed in a strip slide groove 21 provided on the inner wall of the tube 8 in a vertical sliding manner. The strip slide groove 21 is connected to a circular mounting cavity 19. The reason why it is circular is to vertically install a pressure-resistant spring 20 in the mounting cavity 19. The bottom end of the pressure-resistant spring 20 contacts and contacts the slider 18. Under normal conditions, the slider 18 of the impact member is at the lowest position. When the mud passes through the through hole, the pressure-resistant spring 20 is axially squeezed and accumulates a large potential energy, so that when the mud flows out from the perforation 7 and the mud discharge hole 6, it hits the drill pipe 2 and generates axial vibration. In order to protect the pressure-resistant spring 20, the top of the strip slide groove 21 is lower than the top of the mounting cavity 19. Finally, in actual production, a plurality of first slurry outlet holes 23 may be provided on the top wall of the sliding cover 11, and the top end of the tube 8 may have a second slurry outlet hole 24 connected to the first slurry outlet hole 23, so that when the impact member is pushed upward, the slurry can flow out through the slurry outlet hole. Of course, this slurry outlet hole may also be provided on the side wall of the tube 8 above the closing plate 10, so that the slurry outlet direction is similar to the above-mentioned slurry discharge hole 6.

[0034] The above series of specific implementation details are only for demonstrating the core structural principle of the present invention. For the other details not mentioned, those skilled in the art can adaptively assist in designing the matching according to the prior art. For example, the viscosity of the mud produced by drilling with the drilling fluid by the drill bit 1 can be achieved by changing the amount of water sprayed at the drill bit 1. The delivery of the drilling fluid or water during drilling can also be referred to in the prior art, or water delivery holes can be directly set on the drill rod 2 and the drill bit 1 to deliver the water required for drilling to the drill bit 1.

[0035] The above embodiments themselves only show some preferred embodiments of the present invention, and cannot be used to limit the protection scope of the claims of the present invention. Ordinary technicians in this field can simply change the design ideas based on the understanding of the above embodiments and the basic principles recorded in the claims of the present invention, but these changed designs still fall within the protection scope of the invention.

Claims

1. A vortex-vibration downhole power tool for deep drilling, comprising a drill bit (1), a drill rod (2) on which the drill bit (1) is fixedly mounted, and a coaxially arranged turbine (4), characterized in that: The drill rod (2) is coaxially rotatably mounted in a protective tube (3); the drill bit (1) is exposed outside the bottom end of the protective tube (3); a tube (8) is coaxially fixedly mounted outside the protective tube (3); the turbine (4) located in the tube (8) is coaxially rotatably mounted on the protective tube (3); a connecting tube (5) is coaxially fixed on the top surface of the blades (401) of the turbine (4); a through hole (7) is provided on the wall of the connecting tube (5); and a slurry discharge hole (6) is provided on the side wall of the tube (8) at a height corresponding to the through hole (7); A rotating disk (9) is coaxially fixed to the top of the connecting tube (5), the rotating disk (9) is provided with a plurality of first through holes (16), the upper end surface of the rotating disk (9) is provided with a closing disk (10) fixed to the inner wall of the tube (8), the closing disk (10) is provided with a plurality of second through holes, and an impact piece is vertically and elastically installed above the rotating disk (9); When the mud drilled out by the drill bit (1) washes the turbine (4) upward through the mud delivery gap (B) between the tube (8) and the protective tube (3), the turbine (4) rotates and drives the turntable (9) to rotate. During the rotation of the turbine (4), the first through hole (16) and the second through hole are connected to each other, or the through hole (7) is connected to the mud discharge hole (6). When the two through holes are connected, the mud impacts the impact piece to move upward in the tube (8). When the two through holes are not connected, the mud is discharged through the through hole (7) and the mud discharge hole (6) in sequence. At the same time, the impact piece falls and rebounds to hit the drill rod (2). The impact member comprises a bottle cap-shaped sliding cover (11) with an opening facing downward, the sliding cover (11) is axially slidably sleeved on the drill rod (2) and can contact the shaft ring (22) on the drill rod (2); a sliding block (18) is fixed to the outer wall of the sliding cover (11), and the sliding block (18) is vertically slidably mounted in a strip sliding groove (21) provided on the inner wall of the tube (8), the strip sliding groove (21) is connected to a circular mounting cavity (19), and a pressure-resistant spring (20) is vertically mounted in the mounting cavity (19), and the bottom end of the pressure-resistant spring (20) is in contact with the sliding block (18).

2. A deep drilling vortex downhole power tool according to claim 1, characterized in that: The through holes are arranged in a circular array on the rotating disk (9) and the closing disk (10), so that when the rotating disk (9) rotates by a set angle relative to the closing disk (10), the first through holes (16) and the second through holes can be aligned and connected with each other.

3. A deep drilling vortex downhole power tool according to claim 1, characterized in that: The bottom end of the protective tube (3) is a truncated cone-shaped structure (13) with a small end facing upward, and the bottom end surface is in smooth contact with the fixed end surface of the drill bit (1). The bottom end of the drill rod (2) passes through the truncated cone-shaped structure (13) and is fixed to the center of the top end of the drill bit (1).

4. A deep drilling vortex downhole power tool according to claim 3, characterized in that: The bottom end of the tube (8) has a bell mouth (12) with a large end facing downwards, and the taper of the bell mouth (12) is consistent with the taper of the truncated cone-shaped structure (13).

5. A deep drilling vortex downhole power tool according to claim 4, characterized in that: A conical cover (14) is provided at a position close to the lower end of the outer wall of the tube (8), the large end of the conical cover (14) faces downward, and the diameter of the cover edge of the conical cover (14) is consistent with the diameter of the drill hole of the drill bit (1), and a slurry inlet channel (15) inclined upward is provided in the conical cover (14).

6. A deep drilling vortex shock downhole power tool according to claim 5, characterized in that: The cover edge of the conical cover (14) has a rounded corner; the diameter of the protective tube (3) near the turbine (4) gradually increases.

7. A deep drilling vortex downhole power tool according to claim 1, characterized in that: The rotating disk (9) is coaxially rotatably sleeved on the outside of the protective tube (3) and is installed with a dynamic seal therewith; the closing disk (10) is coaxially fixed on the protective tube (3), and the cylindrical side wall of the closing disk (10) is fixed on the inner wall of the tube (8).

8. A deep drilling vortex downhole power tool according to claim 1, characterized in that: A shaft sleeve (17) is coaxially fixed to the top end of the closing disk (10), and the shaft sleeve (17) is coaxially rotatably mounted on the drill rod (2), and the drill rod (2) and the shaft sleeve (17) can also be axially slidably matched.

9. A deep drilling vortex downhole power tool according to claim 1, characterized in that: The top end of the strip-shaped slide groove (21) is lower than the top end of the installation cavity (19); the top wall of the sliding cover (11) is provided with a plurality of first slurry outlet holes (23), and the top end of the tube (8) is provided with a second slurry outlet hole (24) connected to the first slurry outlet holes (23).

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