A high-frequency impact vibration three-dimensional rock breaking speed-increasing device

Abstract

The present invention discloses a high-frequency impact vibration three-dimensional rock breaking and speed-up device, comprising: a mandrel; a rotating mechanism for driving the mandrel to rotate axially between the side wall of the mandrel and the inner wall of the shell; the mandrel is connected to a rotating guide mechanism through a connecting mechanism, and an impact piston is sleeved on the outer side of the rotating guide mechanism; the inner side wall of the impact piston has a first groove; a lower joint is installed at the bottom of the shell, the top of the lower joint has a first protrusion, the first protrusion has an upward arc-shaped inclined surface, and the bottom end of the impact piston has a second protrusion, and the position of the second protrusion corresponds to the arc-shaped inclined surface. This is to solve the problem that the previous rock breaking and speed-up tools can only provide axial or axial vibration impact alone during drilling, and cannot reduce stick-slip vibration while making the drill bit have a better penetration depth, and the shearing efficiency is low; and the previous speed-up tools are affected by the loss of the driving mechanism and have a short service life.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas drilling, in particular to a high-frequency impact vibration three-dimensional rock breaking speed-increasing device. Background Art

[0002] Due to the strong abrasiveness of the rock in deep and difficult-to-drill formations, the drilling footage of a single drill bit is small during drilling, and the average mechanical drilling speed is slow. At present, there are roughly two types of speed-up tools. One is a speed-up tool that can generate circumferential impact vibration. The tool is mainly driven by the impeller to generate a pressure difference in the internal fluid transposition mechanism, and finally drives the circumferential mechanism to generate reciprocating vibration. This principle mechanism is mainly aimed at the stick-slip problem of the drill bit, and can effectively solve the damage to the drill bit caused by stick-slip vibration; the other is a speed-up tool that can generate axial impact vibration. This tool is mainly driven by a high-speed power mechanism such as a screw. The circumferential rotating disk slides on the roller. Due to the high and low axial displacement changes on the rotating disk, an axial impact force will be provided to the lower drill bit. Both types of speed-up tools have their limitations. Circumferential impact tools can reduce stick-slip vibration, but cannot provide the drill bit with a depth of penetration. Axial impact tools can provide the drill bit with a depth of penetration, but their shearing efficiency is low, and the tool life is greatly affected by the life of the driving mechanism. Summary of the invention

[0003] In view of this, the present invention provides a high-frequency impact vibration three-dimensional rock breaking and speed-up device to solve the problem that previous rock breaking and speed-up tools can only provide axial or axial vibration impact alone during drilling, cannot reduce stick-slip vibration while allowing the drill bit to have a better penetration depth, and have low shearing efficiency; and previous speed-up tools are affected by the loss of the driving mechanism, resulting in a short service life.

[0004] The present invention provides a high-frequency impact vibration three-dimensional rock breaking speed-increasing device, comprising: a mandrel;

[0005] The spindle is located inside the shell, and a rotating mechanism is provided between the side wall of the spindle and the inner wall of the shell for driving the spindle to rotate along the axial direction;

[0006] The spindle is connected to the rotary flow guide mechanism through a connecting mechanism, and an impact piston is sleeved on the outer side of the rotary flow guide mechanism;

[0007] The inner side wall of the impact piston is provided with a first groove, the rotating flow guide mechanism is used to generate a first pressure fluid and a second pressure fluid, and is used to periodically allow the first pressure fluid to enter the upper part of the impact piston and the second pressure fluid to enter the first groove, and periodically allow the second pressure fluid to enter the upper part of the impact piston and the first pressure fluid to enter the first groove, wherein the first pressure is greater than the second pressure;

[0008] A lower joint is installed at the bottom of the shell, the top of the lower joint has a first protrusion, the first protrusion has an upward arc-shaped inclined surface, the bottom end of the impact piston has a second protrusion, the position of the second protrusion corresponds to the arc-shaped inclined surface.

[0009] Preferably, the rotary flow guide mechanism comprises: a rotary tube and a piston straightening sleeve;

[0010] The top end of the rotating tube is connected to the spindle through the connecting mechanism, and the rotating tube has a high-pressure chamber and a low-pressure chamber inside, the high-pressure chamber is located above the low-pressure chamber, the diameter of the high-pressure chamber is larger than the diameter of the low-pressure chamber, the high-pressure chamber is connected to the low-pressure chamber, and the side wall of the high-pressure chamber has a guide hole;

[0011] A high-pressure leakage hole is provided on the side wall of the rotating tube in the high-pressure chamber, and a low-pressure leakage hole is provided on the side wall of the rotating tube on the opposite side, and the low-pressure leakage hole is located inside the low-pressure chamber;

[0012] The piston straightening sleeve is sleeved on the outside of the rotating tube, and an upper leakage hole and a lower leakage hole are provided on the side wall of the piston straightening sleeve. The position of the upper leakage hole corresponds to the high-pressure leakage hole, and the upper leakage hole is connected to the top of the impact piston. The position of the lower leakage hole corresponds to the low-pressure leakage hole, and the lower leakage hole is connected to the first groove;

[0013] The outer side wall of the rotating tube is provided with a first flow channel and a second flow channel, one end of the first flow channel is connected to the high-pressure leakage hole, and the other end is located at the same horizontal line as the lower leakage hole, and one end of the second flow channel is connected to the low-pressure leakage hole, and the other end is located at the same horizontal line as the upper leakage hole.

[0014] Preferably, the rotating mechanism comprises: a turbine rotor and a turbine stator;

[0015] The turbine rotor and the turbine stator are sleeved outside the spindle, the spindle has a first shoulder on the side wall near the bottom, the turbine rotor is located above the first shoulder, and the turbine rotor is connected to the spindle through a first fixing mechanism;

[0016] A second shoulder is provided on the inner side wall of the shell, the turbine stator is located above the second shoulder, and the turbine stator is connected to the shell via a second fixing mechanism.

[0017] Preferably, the first fixing mechanism comprises an adjusting inner ring and a spindle locking nut;

[0018] The second fixing mechanism is an adjusting outer ring;

[0019] The top end of the spindle is threadedly connected to the spindle locking nut, the adjusting inner ring is sleeved on the outside of the spindle, the top end of the adjusting inner ring contacts the bottom end of the spindle locking nut, and the bottom end of the adjusting inner ring contacts the top end of the turbine rotor;

[0020] The top end of the shell is threadedly connected to the upper joint, the adjusting outer ring is sleeved on the outside of the adjusting inner ring, the top end of the adjusting outer ring contacts the bottom end of the upper joint, and the bottom end of the adjusting outer ring contacts the top end of the turbine stator.

[0021] Preferably, the connecting mechanism comprises: a connecting shaft, an upper connecting pin and a lower connecting pin;

[0022] The bottom end of the spindle is provided with a fixing groove, the top end of the connecting shaft is inserted into the fixing groove, and the spindle is connected to the connecting shaft via an upper connecting pin;

[0023] The bottom end of the connecting shaft is inserted into the rotating flow guiding mechanism, and the rotating flow guiding mechanism is connected to the connecting shaft via the lower connecting pin.

[0024] Preferably, it also includes: an anti-drop ring;

[0025] The anti-drop ring is sleeved on the outside of the spindle through a threaded structure, and its position corresponds to the upper connecting pin.

[0026] Preferably, it also includes: a centralizing bearing;

[0027] The centering bearing is sleeved on the outside of the spindle, the inner side wall of the centering bearing is in contact with the spindle, and the outer side wall of the centering bearing is in contact with the inner wall of the housing.

[0028] Preferably, it also includes: an anti-rotation tooth insert;

[0029] The anti-rotation teeth are arranged between the lower joint and the shell.

[0030] The present invention has the following beneficial effects:

[0031] The present invention provides a high-frequency impact vibration three-dimensional rock breaking speed-up device, which drives the mandrel to rotate by arranging a rotating mechanism, and the mandrel drives the rotating guide mechanism to rotate. The rotating guide mechanism periodically inputs a first pressure fluid to the top of the impact piston or the inside of the first groove, thereby pushing the impact piston to reciprocate up and down to generate axial impact; through the cooperation of the first protrusion arranged on the lower joint and the second protrusion on the impact piston, the impact piston generates a circumferential impact while generating an axial impact, thereby increasing the penetration depth of the drill bit and increasing the shearing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0033] Figure 1 It is a structural schematic diagram of a high-frequency impact vibration three-dimensional rock breaking and speed-up device according to an embodiment of the present invention.

[0034] Figure 2 Schematic diagram of the structure of the impact piston in the initial state in the embodiment of the present invention.

[0035] Figure 3 It is a schematic structural diagram of the impact piston in the downward impact state in an embodiment of the present invention.

[0036] In the figure, 1-upper joint, 2-spindle locking nut, 3-power housing, 4-adjusting outer ring, 5-adjusting inner ring, 6-spindle, 7-centering bearing, 8-turbine rotor, 9-turbine stator, 10-upper connecting pin, 11-connecting shaft, 12-anti-drop ring, 13-lower connecting pin, 14-rotating tube, 15-guide hole, 16-high pressure chamber, 17-impact housing, 18-piston centering sleeve, 19-upper leakage hole, 20-high pressure leakage hole, 21-impact piston, 22-low pressure leakage hole, 23-lower leakage hole, 24-first protrusion, 25-second protrusion, 26-low pressure chamber, 27-lower joint, 28-first flow channel, 29-second flow channel, 30-first groove, 31-second groove, 33-third groove. DETAILED DESCRIPTION

[0037] The present invention is described below based on embodiment, but it is worth noting that the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. However, for the part not described in detail, those skilled in the art can also fully understand the present invention.

[0038] In addition, those skilled in the art should understand that the drawings are only provided to illustrate the purpose, features and advantages of the present invention, and the drawings are not actually drawn to scale.

[0039] At the same time, unless the context clearly requires otherwise, the words "include", "comprises" and similar words throughout the specification and claims should be interpreted as inclusive rather than exclusive or exhaustive; that is, the meaning of "including but not limited to".

[0040] Figure 1 It is a structural schematic diagram of a high-frequency impact vibration three-dimensional rock breaking and speed-up device according to an embodiment of the present invention. Figure 2 Schematic diagram of the structure of the impact piston in the initial state in the embodiment of the present invention. Figure 3Schematic diagram of the structure of the impact piston in the downward impact state according to the embodiment of the present invention. Figure 1 , 2 As shown in Figure 3, a high-frequency impact vibration three-dimensional rock breaking and speed-up device comprises: a spindle 6; the spindle 6 is inside a shell, and a rotating mechanism for driving the spindle 6 to rotate axially is provided between the side wall of the spindle 6 and the inner wall of the shell; the spindle 6 is connected to a rotating guide mechanism through a connecting mechanism, and an impact piston 21 is sleeved on the outer side of the rotating guide mechanism; a first groove 30 is provided on the inner side wall of the impact piston 21, and the rotating guide mechanism is used to generate a first pressure fluid and a second pressure fluid, and to periodically allow the first pressure fluid to enter the top of the impact piston 21 and the second pressure fluid to enter the first groove 30, and to periodically allow the second pressure fluid to enter the top of the impact piston 21 and the first pressure fluid to enter the first groove 30, wherein the first pressure is greater than the second pressure; a lower joint 27 is installed at the bottom of the shell, and the top of the lower joint 27 has a first protrusion 24, and the first protrusion 24 has an upward arc-shaped inclined surface, and the bottom end of the impact piston 21 has a second protrusion 25, and the position of the second protrusion 25 corresponds to the arc-shaped inclined surface.

[0041] In the embodiment of the present invention, the housing includes a power housing 3 and an impact housing 17 , the bottom end of the power housing 3 is connected to the top end of the impact housing 17 , the spindle 6 and the rotating mechanism are inside the power housing 3 , and the impact piston 21 is inside the impact housing 17 .

[0042] When breaking rock underground, the top of the power housing 3 is connected to the pipe string through the upper joint 1, and the bottom of the impact housing 17 is connected to the drill bit through the lower joint 27. The high-frequency impact vibration three-dimensional rock breaking speed-up device is lowered into the underground, and while lowering, fluid is injected into the pipe. The fluid enters the power housing 3 through the upper joint 1, and the fluid flows through the rotating mechanism to provide power for the rotating mechanism. The rotating mechanism drives the mandrel 6 to rotate axially, and the mandrel 6 drives the rotating guide mechanism connected to the bottom end to rotate; after the fluid enters the rotating guide mechanism, two pressure fluids are generated, namely the first pressure fluid and the second pressure fluid.

[0043] When the rotary guide mechanism rotates, the first pressure fluid is periodically allowed to enter the top of the impact piston 21, and the second pressure fluid is simultaneously allowed to enter the first groove 30 of the inner side wall of the impact piston 21, and the second pressure fluid is periodically allowed to enter the top of the impact piston 21, and the first pressure fluid is simultaneously allowed to enter the first groove 30 of the inner side wall of the impact piston 21.

[0044] When the rotating flow guide mechanism allows the first pressure fluid to enter the top of the impact piston 21 and the second pressure fluid to enter the first groove 30 on the inner wall of the impact piston 21, because the first pressure is greater than the second pressure, the first pressure fluid above the impact piston 21, that is, between the top of the impact piston 21 and the top of the impact shell 17, will push the impact piston 21 to move downward; when the impact piston 21 moves to the lower joint 27 below, it generates a downward axial impact on the lower joint 27, thereby generating a downward impact on the drill bit connected to the lower joint 27; when the impact piston 21 moves to the top position of the lower joint 27, the second protrusion 25 at its bottom end contacts and collides with the first protrusion 24 with an arc-shaped inclined surface at the top of the lower joint 27, and when the second protrusion 25 moves downward along the arc-shaped inclined surface, it pushes the first protrusion 24 and the lower joint 27 to move slightly in the circumferential direction, thereby causing the lower joint 27 to drive the drill bit to vibrate circumferentially. Among them, at least two first protrusions 24 are evenly arranged at the top of the lower joint 27 along the circumferential direction, and the arc-shaped inclined surface of each first protrusion 24 is in the same direction in the clockwise or counterclockwise direction along the circumference of the lower joint 27, and the angle between each arc-shaped inclined surface and the horizontal line is the same; the number and position of the second protrusions 25 on the impact piston 21 correspond to the first protrusions 24.

[0045] When the rotating flow guide mechanism allows the second pressure fluid to enter the top of the impact piston 21 and the first pressure fluid to enter the first groove 30 of the inner wall of the impact piston 21, because the first pressure is greater than the second pressure, the first pressure fluid in the first groove 30 will push the impact piston 21 to move upward and away from the lower joint 27. The moment when the first pressure fluid enters the top of the impact piston 21 does not overlap with the moment when the first pressure fluid enters the first groove 30.

[0046] In the present invention, the rotating flow guide mechanism includes: a rotating tube 14 and a piston straightening sleeve 18; the top end of the rotating tube 14 is connected to the core shaft 6 through the connecting mechanism, and the rotating tube 14 has a high-pressure chamber 16 and a low-pressure chamber 26 inside, the high-pressure chamber 16 is located above the low-pressure chamber 26, the diameter of the high-pressure chamber 16 is larger than the diameter of the low-pressure chamber 26, the high-pressure chamber 16 is connected to the low-pressure chamber 26, and the side wall of the high-pressure chamber 16 has a flow guide hole 15; the side wall of the rotating tube 14 in the high-pressure chamber 16 has a high-pressure leakage hole 20, and the side wall of the rotating tube 14 on the opposite side has a low-pressure leakage hole 22, and the low-pressure leakage hole 22 is inside the low-pressure chamber 26; the piston The straightening sleeve 18 is sleeved on the outside of the rotating tube 14, and an upper leakage hole 19 and a lower leakage hole 23 are provided on the side wall of the piston straightening sleeve 18. The position of the upper leakage hole 19 corresponds to the high-pressure leakage hole 20, and the upper leakage hole 19 is connected to the top of the impact piston 21. The position of the lower leakage hole 23 corresponds to the low-pressure leakage hole 22, and the lower leakage hole 23 is connected to the first groove 30; the outer side wall of the rotating tube 14 is respectively provided with a first flow channel 28 and a second flow channel 29, one end of the first flow channel 28 is connected to the high-pressure leakage hole 20, and the other end is located at the same horizontal line as the lower leakage hole 23, and one end of the second flow channel 29 is connected to the low-pressure leakage hole 22, and the other end is located at the same horizontal line as the upper leakage hole 19.

[0047] In an embodiment of the present invention, the guide hole 15 is located on the side wall of the rotating tube 14 in the high-pressure chamber 16, and three guide holes are arranged along the circumference of the rotating tube 14. The guide hole 15 is located close to the top of the rotating tube 14; the part of the rotating tube 14 with the guide hole 15 is located inside the power shell 3; the part of the high-pressure chamber 16 below the guide hole 15 and the low-pressure chamber 26 are located inside the impact shell 17.

[0048] The impact piston 21 is located between the piston straightening sleeve 18 and the housing, and has a second groove 31 on the inner side wall of the impact piston 21. The second groove 31 is located above the first groove 30, and the top of the second groove 31 is an opening, so that the second groove 31 is connected to the space above the impact piston 21. The first groove 30 and the second groove 31 are annular grooves.

[0049] There is also a connecting chamber between the high-pressure chamber 16 and the low-pressure chamber 26. The top of the connecting chamber is connected to the high-pressure chamber 16, and the bottom is connected to the low-pressure chamber 26. The diameter of the connecting chamber is larger than the diameter of the low-pressure chamber 26 and smaller than the diameter of the high-pressure chamber 16.

[0050] A third groove 33 is formed on the outer side wall of the piston straightening sleeve 18 . The third groove 33 is an annular groove. An opening is formed below the third groove 33 . The impact piston 21 is located inside the third groove 33 .

[0051] When fluid begins to be injected into the tubing, the fluid passes through the rotating mechanism downward to the bottom of the power casing 3, enters the high-pressure chamber 16 from the guide hole 15 on the side wall of the rotating tube 14, and part of the fluid then passes through the connecting chamber into the low-pressure chamber 26 below. The fluid in the high-pressure chamber 16 is the first pressure fluid, and the fluid entering the low-pressure chamber 26 is the second pressure fluid. Because the diameter of the high-pressure chamber 16 is larger than the diameter of the low-pressure chamber 26, the pressure of the fluid entering the low-pressure chamber 26, that is, the second pressure, will be lower than the pressure of the fluid in the high-pressure chamber 16, that is, the first pressure.

[0052] In the initial state, the top of the impact piston 21 contacts the top of the third groove 33 of the piston straightening sleeve 18 , and there is a certain distance between the bottom end of the impact piston 21 and the top end of the lower joint 27 .

[0053] The rotating mechanism drives the rotating tube 14 to rotate along the axis through the core shaft 6. When the high-pressure leakage hole 20 of the rotating tube 14 rotates to overlap with the upper leakage hole 19 of the piston straightening sleeve 18, the first pressure fluid in the high-pressure chamber 16 enters the upper leakage hole 19 through the high-pressure leakage hole 20, and then enters the second groove 31 through the upper leakage hole 19. The first pressure fluid passes through the second groove 31 and upwardly enters the top of the impact piston 21, that is, between the impact piston 21 and the top of the third groove 33.

[0054] At the same time, because the low-pressure leakage hole 22 and the high-pressure leakage hole 20 are on the opposite side, and the position of the upper leakage hole 19 corresponds to the high-pressure leakage hole 20, and the position of the lower leakage hole 23 corresponds to the low-pressure leakage hole 22, when the high-pressure leakage hole 20 overlaps with the upper leakage hole 19, the low-pressure leakage hole 22 overlaps with the lower leakage hole 23; the second pressure fluid in the low-pressure chamber 26 enters the first groove 30 through the low-pressure leakage hole 22 and the lower leakage hole 23.

[0055] Because the pressure of the first pressure fluid is greater than the pressure of the second pressure fluid, the first pressure fluid entering between the impact piston 21 and the top of the third groove 33 will push the impact piston 21 to move downward until the second protrusion 25 at the bottom of the impact piston 21 contacts and collides with the arc-shaped inclined surface of the first protrusion 24 at the top of the lower joint 27.

[0056] The spindle 6 continues to drive the rotating tube 14 to rotate along the axis. When the high-pressure leakage hole 20 rotates to the side close to the lower leakage hole 23, the low-pressure leakage hole 22 rotates to the side close to the upper leakage hole 19. At this time, the other end of the first flow channel 28 overlaps with the upper leakage hole 19, and the other end of the second flow channel 29 overlaps with the lower leakage hole 23.

[0057] The first pressure fluid in the high-pressure chamber 16 enters the first flow channel 28 through the high-pressure leakage hole 20, and after reaching the other end of the first flow channel 28, it enters the first groove 30 through the lower leakage hole 23. At the same time, the second pressure fluid in the low-pressure chamber 26 enters the second flow channel 29 through the low-pressure leakage hole 22, and after reaching the other end of the second flow channel 29, it enters between the impact piston 21 and the top of the third groove 33 through the upper leakage hole 19 and the second groove 31; because the first pressure is greater than the second pressure, the first pressure fluid in the first groove 30 will push the impact piston 21 to move upward, so that the impact piston 21 is away from the lower joint 27.

[0058] During the continuous rotation of the rotating tube 14, the impact piston 21 completes an upward or downward movement every half rotation, and the impact piston 21 completes an up and down reciprocating movement every one rotation of the rotating tube 14. Through the rotation of the rotating tube 14, the first pressure fluid periodically enters between the impact piston 21 and the top of the third groove 33, the second pressure fluid enters the first groove 30, and the second pressure fluid periodically enters the top of the impact piston 21 and the first pressure fluid enters the first groove 30, thereby driving the impact piston 21 to continuously reciprocate and hit the lower joint 27 below, generating axial and circumferential impacts on the drill bit.

[0059] In the present invention, the rotating mechanism includes: a turbine rotor 8 and a turbine stator 9; the turbine rotor 8 and the turbine stator 9 are sleeved on the outside of the spindle 6, the spindle 6 has a first shoulder on the side wall near the bottom, the turbine rotor 8 is above the first shoulder, and the turbine rotor 8 is connected to the spindle 6 through a first fixing mechanism; the inner side wall of the shell has a second shoulder, the turbine stator 9 is above the second shoulder, and the turbine stator 9 is connected to the shell through a second fixing mechanism.

[0060] In the embodiment of the present invention, the second shoulder is located inside the power housing 3, and its position corresponds to that of the first shoulder. A multi-stage turbine stator 9 and a turbine rotor 8 are sleeved on the outside of the core shaft 6. When the fluid enters the power housing 3 from the upper joint 1, the fluid passes through the turbine rotor 8 and the turbine stator 9. The turbine rotor 8 is driven to rotate due to the fluid pressure, and the turbine rotor 8 drives the core shaft 6 to rotate, thereby driving the rotating tube 14 to rotate continuously along the axis.

[0061] In the present invention, the first fixing mechanism includes an adjusting inner ring 5 and a spindle locking nut 2, and the second fixing mechanism is an adjusting outer ring 4; the top end of the spindle 6 is threadedly connected to the spindle locking nut 2, the adjusting inner ring 5 is sleeved on the outside of the spindle 6, the top end of the adjusting inner ring 5 contacts the bottom end of the spindle locking nut 2, and the bottom end of the adjusting inner ring 5 contacts the top end of the turbine rotor 8;

[0062] The top end of the shell is threadedly connected to the upper joint 1, the adjusting outer ring 4 is sleeved on the outside of the adjusting inner ring 5, the top end of the adjusting outer ring 4 contacts the bottom end of the upper joint 1, and the bottom end of the adjusting outer ring 4 contacts the top end of the turbine stator 9.

[0063] In the embodiment of the present invention, the adjusting inner ring 5 and the adjusting outer ring 4 are sleeved on the outside of the spindle 6, the adjusting inner ring 5 is located above the turbine rotor 8, and the adjusting outer ring 4 is located above the turbine stator 9; the upper and lower ends of the adjusting inner ring 5 respectively abut the bottom end of the spindle locking nut 2 and the top end of the turbine rotor 8, and the lower part of the turbine rotor 8 is positioned by the first shoulder on the side wall of the spindle 6, so that the turbine rotor 8 is fixed to the outer wall of the spindle 6 by up and down extrusion. The upper and lower ends of the adjusting outer ring 4 respectively abut the bottom end of the upper joint 1 and the top end of the turbine stator 9, and the lower part of the turbine stator 9 is positioned by the second shoulder in the power housing 3, so that the turbine stator 9 is fixed to the inner wall of the power housing 3 by up and down extrusion.

[0064] The method of fixing the turbine stator 9 and the turbine rotor 8 with pre-tightening force does not require changing the structure of the spindle 6 and the inner wall of the shell. The inner wall of the power shell 3 and the outer wall of the spindle 6 can be connected and fixed as cylindrical surfaces, which reduces the difficulty and cost of part processing and improves part strength.

[0065] In the present invention, the connecting mechanism includes: a connecting shaft 11, an upper connecting pin 10 and a lower connecting pin 13; a fixing groove is provided on the bottom end of the central shaft 6, the top end of the connecting shaft 11 is inserted into the fixing groove, and the central shaft 6 is connected to the connecting shaft 11 through the upper connecting pin 10; the bottom end of the connecting shaft 11 is inserted into the rotating guide mechanism, and the rotating guide mechanism is connected to the connecting shaft 11 through the lower connecting pin 13.

[0066] The present invention further includes: an anti-drop ring 12 ; the anti-drop ring 12 is sleeved on the outside of the spindle 6 through a threaded structure, and its position corresponds to that of the upper connecting pin 10 .

[0067] In the embodiment of the present invention, the side walls of the mandrel 6 opposite to each other in the fixing groove are respectively provided with a first through hole, and the connecting shaft 11 inside the fixing groove is provided with a second through hole corresponding to the position of the first through hole; the upper connecting pin 10 passes through the first through hole and the second through hole respectively, thereby fixing the connecting shaft 11 in the fixing groove. The anti-drop ring 12 is sleeved on the outside of the mandrel 6 and is connected to the mandrel 6 through a threaded structure. The position of the anti-drop ring 12 on the mandrel 6 partially overlaps with the position of the first through hole, thereby fixing the upper connecting pin 10 inside the first through hole to prevent it from falling out.

[0068] The present invention further comprises: a centering bearing 7; the centering bearing 7 is sleeved on the outside of the spindle 6, the inner side wall of the centering bearing 7 is in contact with the spindle 6, and the outer side wall of the centering bearing 7 is in contact with the inner wall of the housing.

[0069] In the embodiment of the present invention, there are two stabilizing bearings 7, one is located between the adjusting inner ring 5 and the turbine rotor 8, and the other is located near the bottom end of the spindle 6. The stabilizing bearings 7 are used to stabilise the spindle 6 so that the spindle 6 remains in a vertical state inside the power housing 3 when it rotates.

[0070] The present invention further comprises: an anti-rotation tooth; the anti-rotation tooth is arranged between the lower joint 27 and the shell.

[0071] In the embodiment of the present invention, when breaking rock, fluid is pressurized and injected into the pipe string, and the drilling fluid enters the power casing 3 downward through the internal cavity of the upper joint 1. When passing through the turbine stator 9 and the turbine rotor 8, the turbine rotor 8 is driven to rotate due to the fluid pressure, and the turbine rotor 8 drives the core shaft 6 and the rotating tube 14 to rotate; after the fluid reaches the bottom of the power casing 3, it enters the high-pressure chamber 16 and the low-pressure chamber 26 through the guide hole 15 on the rotating tube 14.

[0072] When the rotating tube 14 rotates to the point where the high-pressure leakage hole 20 overlaps with the upper leakage hole 19 and the low-pressure leakage hole 22 overlaps with the lower leakage hole 23, the first pressure fluid in the high-pressure chamber 16 enters the top of the impact piston 21 through the high-pressure leakage hole 20, the upper leakage hole 19 and the second groove 31, and the second pressure fluid in the low-pressure chamber 26 enters the first groove 30 through the low-pressure leakage hole 22 and the lower leakage hole 23; because the first pressure is greater than the second pressure, the first pressure fluid between the impact piston 21 and the top of the third groove 33 pushes the impact piston 21 to move downward rapidly, and the second protrusion 25 at the bottom end of the impact piston 21 contacts and collides with the arc-shaped inclined surface of the first protrusion at the top end of the lower joint 27 below, and the second protrusion 25 slides downward on the arc-shaped inclined surface, generating downward axial impact and circumferential impact on the lower joint 27, so that the lower joint 27 drives the drill bit connected to the bottom end to generate downward axial and circumferential vibrations.

[0073] When the rotating tube 14 rotates to the side of the high-pressure leakage hole 20 close to the lower leakage hole 23 and the side of the low-pressure leakage hole 22 close to the upper leakage hole 19, the first pressure fluid in the high-pressure chamber 16 enters the top of the impact piston 21 through the high-pressure leakage hole 20, the second flow channel 29, the upper leakage hole 19, and the second groove 31, and the second pressure fluid in the low-pressure chamber 26 enters the first groove 30 of the impact piston 21 through the low-pressure leakage hole 22, the first flow channel 28, and the lower leakage hole 23; because the first pressure is greater than the second pressure, the first pressure fluid in the first groove 30 pushes the impact piston 21 to move upward to the top of the third groove 33. The continuous rotation of the rotating tube 14 drives the impact piston 21 to reciprocate up and down, thereby generating axial impact and circumferential vibration on the drill bit.

[0074] The present invention is applied to drilling operations, connected to the upper part of the drill bit, and can simultaneously generate high-frequency axial and circumferential vibrations to directly act on the drill bit, thereby increasing the penetration depth of the drill bit, increasing the shearing efficiency, and extending the service life of the drill bit, thereby achieving the purpose of increasing the average mechanical drilling speed, reducing the number of trips and drill bits, and thereby achieving the purpose of reducing costs and increasing efficiency. Compared with the existing method of controlling the impact piston 21 through a spring or a reversing valve, the present invention generates fluids of different pressures by setting high and low pressure chambers 26 inside the rotating tube 14, and drives the rotating tube 14 to rotate through the mandrel 6, switching the high and low pressure fluids to enter the upper part of the impact piston 21 or the first groove 30 on the side wall, and driving the impact piston 21 to move up and down. Its structure is simpler, does not require too many parts to cooperate, reduces the probability of damage, and saves manufacturing and maintenance costs.

[0075] The above-mentioned embodiments are only embodiments of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, without departing from the concept of the present invention, several variations, equivalent substitutions, improvements, etc. can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A high-frequency impact vibration three-dimensional rock breaking speed-up device, characterized in that: include: Mandrel (6); The spindle (6) is located inside the shell, and a rotating mechanism is provided between the side wall of the spindle (6) and the inner wall of the shell for driving the spindle (6) to rotate along the axial direction; The spindle (6) is connected to a rotating flow guiding mechanism via a connecting mechanism, and an impact piston (21) is sleeved on the outside of the rotating flow guiding mechanism; The inner side wall of the impact piston (21) is provided with a first groove (30), the rotating flow guide mechanism is used to generate a first pressure fluid and a second pressure fluid, and is used to periodically allow the first pressure fluid to enter the top of the impact piston (21) and the second pressure fluid to enter the first groove (30), and periodically allow the second pressure fluid to enter the top of the impact piston (21) and the first pressure fluid to enter the first groove (30), wherein the first pressure is greater than the second pressure; A lower joint (27) is installed at the bottom of the housing, the top end of the lower joint (27) has a first protrusion (24), the first protrusion (24) has an upwardly facing arc-shaped inclined surface, and the bottom end of the impact piston (21) has a second protrusion (25), the position of the second protrusion (25) corresponds to the arc-shaped inclined surface; The rotary flow guide mechanism comprises: a rotary tube (14) and a piston straightening sleeve (18); The top end of the rotating tube (14) is connected to the spindle (6) via the connecting mechanism; the rotating tube (14) has a high-pressure chamber (16) and a low-pressure chamber (26) inside; the high-pressure chamber (16) is located above the low-pressure chamber (26); the diameter of the high-pressure chamber (16) is greater than the diameter of the low-pressure chamber (26); the high-pressure chamber (16) is in communication with the low-pressure chamber (26); and a guide hole (15) is provided on a side wall of the high-pressure chamber (16); A high-pressure leakage hole (20) is provided on the side wall of the rotating tube (14) in the high-pressure chamber (16), and a low-pressure leakage hole (22) is provided on the side wall of the rotating tube (14) on the opposite side, wherein the low-pressure leakage hole (22) is located inside the low-pressure chamber (26); The piston straightening sleeve (18) is sleeved on the outside of the rotating tube (14), and an upper leakage hole (19) and a lower leakage hole (23) are provided on the side wall of the piston straightening sleeve (18), the position of the upper leakage hole (19) corresponds to the high-pressure leakage hole (20), the upper leakage hole (19) is connected to the top of the impact piston (21), the position of the lower leakage hole (23) corresponds to the low-pressure leakage hole (22), and the lower leakage hole (23) is connected to the first groove (30); The outer wall of the rotating tube (14) is provided with a first flow channel (28) and a second flow channel (29), one end of the first flow channel (28) is connected to the high-pressure leakage hole (20), and the other end is located at the same horizontal line as the lower leakage hole (23); one end of the second flow channel (29) is connected to the low-pressure leakage hole (22), and the other end is located at the same horizontal line as the upper leakage hole (19).

2. The high-frequency impact vibration three-dimensional rock breaking and speed-up device according to claim 1 is characterized in that: The rotating mechanism comprises: a turbine rotor (8) and a turbine stator (9); The turbine rotor (8) and the turbine stator (9) are sleeved outside the spindle (6); a first shoulder is provided on a side wall of the spindle (6) near the bottom; the turbine rotor (8) is located above the first shoulder; and the turbine rotor (8) is connected to the spindle (6) via a first fixing mechanism; A second shoulder is provided on the inner side wall of the shell, the turbine stator (9) is located above the second shoulder, and the turbine stator (9) is connected to the shell via a second fixing mechanism.

3. The high-frequency impact vibration three-dimensional rock breaking and speed-up device according to claim 2 is characterized in that: The first fixing mechanism comprises an adjusting inner ring (5) and a spindle locking nut (2); The second fixing mechanism is an adjusting outer ring (4); The top end of the spindle (6) is threadedly connected to the spindle locking nut (2), the adjusting inner ring (5) is sleeved on the outside of the spindle (6), the top end of the adjusting inner ring (5) contacts the bottom end of the spindle locking nut (2), and the bottom end of the adjusting inner ring (5) contacts the top end of the turbine rotor (8); The top end of the housing is threadedly connected to the upper joint (1), the adjusting outer ring (4) is sleeved on the outside of the adjusting inner ring (5), the top end of the adjusting outer ring (4) contacts the bottom end of the upper joint (1), and the bottom end of the adjusting outer ring (4) contacts the top end of the turbine stator (9).

4. The high-frequency impact vibration three-dimensional rock breaking speed-up device according to claim 1 is characterized in that: The connecting mechanism comprises: a connecting shaft (11), an upper connecting pin (10) and a lower connecting pin (13); The bottom end of the spindle (6) is provided with a fixing groove, the top end of the connecting shaft (11) is inserted into the fixing groove, and the spindle (6) and the connecting shaft (11) are connected via an upper connecting pin (10); The bottom end of the connecting shaft (11) is inserted into the interior of the rotating flow guiding mechanism, and the rotating flow guiding mechanism is connected to the connecting shaft (11) via the lower connecting pin (13).

5. The high-frequency impact vibration three-dimensional rock breaking speed-up device according to claim 4 is characterized in that: Also includes: Anti-drop ring (12); The anti-drop ring (12) is sleeved on the outside of the spindle (6) via a threaded structure, and its position corresponds to the upper connecting pin (10).

6. The high-frequency impact vibration three-dimensional rock breaking and speed-up device according to claim 1 is characterized in that: Also includes: Centering bearing (7); The centering bearing (7) is sleeved on the outside of the spindle (6), the inner side wall of the centering bearing (7) is in contact with the spindle (6), and the outer side wall of the centering bearing (7) is in contact with the inner wall of the housing.

7. The high-frequency impact vibration three-dimensional rock breaking and speed-up device according to any one of claims 1 to 6, characterized in that: Also includes: Anti-rotation tooth inlay; The anti-rotation tooth is arranged between the lower joint (27) and the housing.

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