A rotary impact speed-up tool suitable for hard rock speed-up

Abstract

The present invention belongs to the field of drilling technology, and specifically relates to a rotary impact speed-up tool suitable for hard rock speed-up, which includes a connecting cylinder. Upper and lower connectors are respectively installed at both ends of the connecting cylinder. One end of the lower connector facing the upper connector is the impact end. An installation block and a rotating plate are installed inside the connecting cylinder. The rotating plate is rotatably installed on the installation block through a connecting column. A communication hole is formed in the installation block, and the outlet of the communication hole is inclined and pointed at the rotating plate. An impact hammer is installed on the rotating plate. The impact hammer is in contact with the impact end. A magnetic block is installed on the impact end. The impact hammer and the magnetic block repel each other. The impact hammer can freely move up and down on the rotating plate. The structure of the present invention is simple, which can simplify the internal structure of the speed-up tool, reduce the number of inspections and maintenance of the speed-up tool, ensure the working reliability of the speed-up tool, thereby improving the energy transfer efficiency of the drilling fluid and accelerating the drilling speed.

Description

Technical Field

[0001] The present invention belongs to the technical field of drilling, and specifically relates to a rotary impact speed-up tool suitable for hard rock speed-up. Background Art

[0002] In the oil and gas industry, drilling operations are characterized by long cycles, high investment, high risks, and high technical requirements. With the increasing degree of resource exploitation, the development of deep wells and ultra-deep wells has become more important, further increasing the requirements for drilling technology. As the drilling depth increases, the hardness and strength of the formation increase significantly, and the drilling efficiency in hard formations is generally low, greatly increasing the drilling cost.

[0003] Most of the existing impactors that can generate axial impact rely on reversing valves. However, the downhole environment is relatively harsh, and it is not easy to repair and maintain the impactor. Therefore, it is easy for the switch valve parts to be damaged due to the erosion of drilling fluid, resulting in unstable performance and short life of the entire impactor, thus seriously affecting the normal progress of drilling work. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, simplify the internal structure of the speed-up tool, reduce the number of repairs and maintenance of the speed-up tool, ensure the working reliability of the speed-up tool, thereby improving the energy transfer efficiency of the drilling fluid and accelerating the drilling speed, the present invention proposes a rotary impact speed-up tool suitable for hard rock speed-up.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: The rotary impact speed-up tool suitable for hard rock speed-up of the present invention includes a connecting cylinder. Upper and lower connectors are respectively installed at both ends of the connecting cylinder. One end of the lower connector facing the upper connector is the impact end. There is no relative rotation between the lower connector, the connecting cylinder, and the upper connector. Among them, a drill bit is installed on the lower connector, the upper connector is connected to the drill pipe, and the drilling fluid enters from the through hole in the middle of the upper connector, enters the lower connector after passing through the connecting cylinder, and finally sprays out from the drill bit.

[0006] An installation block is installed in the connecting cylinder. A rotating plate is installed below the installation block. The rotating plate is rotatably installed on the installation block through a connecting column. A connecting hole is opened on the installation block. The upper end of the connecting column is rotatably installed in the connecting hole. There is a gap between the rotating plate and the inner wall of the connecting cylinder. A communication hole is opened on the installation block. There is an included angle between the outlet direction of the communication hole and the vertical direction. The outlet of the communication hole is inclined towards the rotating plate.

[0007] An impact hammer is installed on the rotating plate. The impact hammer is in contact with the impact end. A magnetic block is installed on the impact end. The impact hammer and the magnetic block repel each other. The impact hammer can freely move up and down on the rotating plate.

[0008] Preferably, the communication holes on the mounting block are evenly distributed around its center line, and the impact hammers are evenly distributed on the rotating plate around the connecting column.

[0009] Preferably, a guide cylinder is installed on the lower surface of the mounting block. The outlet direction of the guide cylinder is the same as that of the communication hole. The inner diameter of the guide cylinder is greater than or equal to the diameter of the impact hammer, and there is no contact between the lower end of the guide cylinder and the upper end of the impact hammer.

[0010] Preferably, the impact hammers are inclinedly installed on the rotating plate, and the inclination directions of the impact hammers on the rotating plate are the same. The liquid discharged from the outlet of the guide cylinder is directly opposite to the upper surface of the impact hammer.

[0011] Preferably, a blocking protrusion is provided on the surface of the impact end. One end of the blocking protrusion is an arc-shaped inclined surface. The lower end of the impact hammer just contacts the arc-shaped inclined surface on the blocking protrusion, and the lower end of the impact hammer has a rounded corner.

[0012] Preferably, a guide groove is formed on the side surface of the rotating plate, and the guide groove is inclinedly arranged.

[0013] Preferably, multiple groups of magnetic blocks are provided on the impact end. The magnetic blocks are independent of each other and do not contact each other, and no magnetic block is installed at the part of the impact end that contacts the impact hammer;

[0014] The magnetic block is composed of a middle block, a left magnetic block, and a right magnetic block. The magnetic field intensities of the left magnetic block and the right magnetic block are less than that of the middle block.

[0015] Preferably, a guide ring is installed on the rotating plate. The impact hammer passes through the middle of the guide ring. A positioning ball is provided on the guide ring, and a groove is provided on the surface of the impact hammer. The positioning ball and the groove match each other.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. For the rotary impact speed-up tool suitable for hard rock speed-up in the present invention, by setting the rotating plate, the guide groove, the impact hammer, and the communication hole, the internal structure of the speed-up tool is relatively simplified, the complexity of the internal structure of the speed-up tool is reduced, and the reliability of the speed-up tool during operation is ensured. At the same time, the drilling fluid directly impacts the impact hammer, so that the impact hammer impacts the impact end to generate an impact force, and drives the impact hammer and the rotating plate to rotate, improving the transmission efficiency of the drilling fluid energy. Moreover, the impact hammer generates axial and circumferential impact forces, improving the impact effect of the drill bit and accelerating the drilling speed.

[0018] 2. The rotary impact speed-up tool suitable for hard rock speed-up in the present invention, by setting magnetic blocks, a guide ring and a guide cylinder, reduces the influence of the magnetic repulsive force on the impact hammer when it impacts downward, and reduces the influence on the impact force. At the same time, it guides and restricts the movement of the impact hammer and the flow direction of the drilling fluid, reduces the useless dissipation of the drilling fluid energy, improves the impact effect, and further speeds up the drilling speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is the front view of the speed-up tool of the present invention;

[0021] Figure 2 is the schematic structural diagram of the rotating plate and the impact hammer in the speed-up tool of the present invention;

[0022] Figure 3 is the schematic structural diagram of the impact end in the lower connector of the speed-up tool of the present invention;

[0023] Figure 4 is the schematic structural diagram of the mounting block in the speed-up tool of the present invention;

[0024] In the figure: upper connector 1, connecting cylinder 2, lower connector 3, impact end 31, magnetic block 32, intermediate block 321, left magnetic block 322, right magnetic block 323, blocking projection 33, mounting block 4, communication hole 41, guide cylinder 42, connection hole 43, rotating plate 5, impact hammer 51, connecting column 52, guide groove 53, guide ring 54. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0026] As Figures 1 to 4 shown, the rotary impact speed-up tool suitable for hard rock speed-up in the present invention

[0027] As an embodiment of the present invention, a rotary impact speed-up tool suitable for hard rock speed-up includes a connecting cylinder 2. Upper connectors 1 and lower connectors 3 are respectively installed at both ends of the connecting cylinder 2. The end of the lower connector 3 facing the upper connector 1 is the impact end 31. There is no relative rotation between the lower connector 3, the connecting cylinder 2 and the upper connector 1. Among them, the drill bit is installed on the lower connector 3, the upper connector 1 is connected to the drill pipe, and the drilling fluid enters from the through hole in the middle of the upper connector 1, passes through the connecting cylinder 2 and then enters the lower connector 3, and finally sprays out from the drill bit;

[0028] An installation block 4 is installed inside the connecting cylinder 2. A rotating plate 5 is installed below the installation block 4. The rotating plate 5 is rotatably installed on the installation block 4 through a connecting column 52. A connecting hole 43 is formed on the installation block 4. The upper end of the connecting column 52 is rotatably installed in the connecting hole 43. There is a gap between the rotating plate 5 and the inner wall of the connecting cylinder 2. A communication hole 41 is formed on the installation block 4. There is an included angle between the outlet direction of the communication hole 41 and the vertical direction. The outlet of the communication hole 41 is inclined and points to the rotating plate 5;

[0029] An impact hammer 51 is installed on the rotating plate 5. The impact hammer 51 is in contact with the impact end 31. A magnetic block 32 is installed on the impact end 31. The impact hammer 51 and the magnetic block 32 repel each other. The impact hammer 51 can freely move up and down on the rotating plate 5;

[0030] During the drilling process, the drill bit on the lower connector 3 presses against the formation at the bottom of the well. Driven by the drill rig on the ground, the drill pipe, the speed-up tool, and the drill bit rotate synchronously to drill the formation, and the drilling fluid is sent into the well through the mud pump;

[0031] During the pumping process of the drilling fluid, the drilling fluid will pass through the upper connector 1 and enter the connecting cylinder 2. Under the action of pressure, the drilling fluid will spray out from the communication hole 41. Since the communication hole 41 is inclined, the sprayed drilling fluid impacts obliquely on the rotating plate 5 and the impact hammer 51 on the rotating plate 5. At the same time, through the impact of the drilling fluid on the side of the impact hammer 51, it will push the impact hammer 51 and the rotating plate 5 to rotate, and then the position of the impact hammer 51 changes relatively, that is, the impact hammer 51 gradually reaches below the communication hole 41, so that the drilling fluid sprayed out from the communication hole 41 impacts the upper end face of the impact hammer 51;

[0032] During this process, the impact hammer 51 will quickly move downward, so that the impact hammer 51 impacts the impact end 31 on the lower connector 3, and then transmits the impact force to the drill bit, generating an impact effect on the drill bit, improving the drilling effect of the drill bit and increasing the drilling speed;

[0033] At the same time, because the drilling fluid sprays obliquely, it generates a driving force on the impact hammer 51 and the rotating plate 5, causing the two to rotate. Therefore, when the impact hammer 51 rotates away from below the communication hole 41, that is, when the sprayed drilling fluid cannot impact the upper end of the impact hammer 51, the magnetic repulsive force existing between the impact hammer 51 and the magnetic block 32 on the impact end 31 will cause the impact hammer 51 to move upward, returning the position of the impact hammer 51 to the initial position, waiting to be impacted by the drilling fluid again;

[0034] Meanwhile, since there is a gap between the rotating plate 5 and the connecting cylinder 2, after the drilling fluid ejected from the communication hole 41 impacts the impact hammer 51, the drilling fluid will pass through the gap between the rotating plate 5 and the connecting cylinder 2 and reach the lower part of the rotating plate 5. After that, the drilling fluid will pass through the lower connector 3 and finally be discharged from the drill bit to the bottom of the well;

[0035] Meanwhile, by utilizing the drilling fluid, the impact hammer 51 is driven by the ejected drilling fluid to impact the drill bit, improving the drilling effect and accelerating the drilling speed. At the same time, through the rotation of the impact hammer 51 and the rotating plate 5, the impact hammers 51 receiving the impact of the ejected drilling fluid are rotated in turn, so that there is no need to set a commutation and rotation structure for the drilling fluid in the speed-up tool, making the internal structure of the speed-up tool simple, simplifying the energy transfer process of the drilling fluid inside the speed-up tool, improving the transfer efficiency, and at the same time improving the reliability of the speed-up tool, thereby reducing the number of parts and accuracy requirements inside the speed-up tool, as well as the maintenance times of the speed-up tool, prolonging the service life of the speed-up tool and reducing the use cost.

[0036] As an embodiment of the present invention, the communication holes 41 on the mounting block 4 are evenly distributed around its center line, and the impact hammers 51 are evenly distributed on the rotating plate 5 around the connecting column 52;

[0037] By arranging multiple groups of communication holes 41 and impact hammers 51, the drilling fluid ejected from the communication holes 41 is evenly distributed to the impact hammers 51, avoiding uneven impact distribution of the impact hammers 51 on the impact end 31, which affects the drilling effect of the drill bit underground and causes the drill bit to skew during drilling;

[0038] Meanwhile, since the impact hammer 51 is slidably mounted on the rotating plate 5 up and down, and the rotating plate 5 rotates around the connecting column 52, through the evenly distributed communication holes 41 and impact hammers 51, when the ejected drilling fluid impacts the impact hammer 51 and the rotating plate 5, the acting forces received by the rotating plate 5 and the impact hammer 51 can be evenly distributed, avoiding jamming or local excessive wear due to uneven force on the rotating plate 5 and the impact hammer 51, resulting in faults inside the speed-up tool and affecting the normal use of the speed-up tool.

[0039] As an embodiment of the present invention, a guide cylinder 42 is mounted on the lower surface of the mounting block 4. The outlet direction of the guide cylinder 42 is the same as the outlet direction of the communication hole 41. The inner diameter of the guide cylinder 42 is greater than or equal to the diameter of the impact hammer 51, and there is no contact between the lower end of the guide cylinder 42 and the upper end of the impact hammer 51;

[0040] By installing the guide cylinder 42 on the mounting block 4, the ejected drilling fluid is guided and constrained, and the diffusion degree of the ejected drilling fluid before contacting the impact hammer 51 is reduced, so as to avoid that the drilling fluid has already begun to affect the impact hammer 51 before the impact hammer 51 rotates below the connecting hole 41, causing the impact hammer 51 to gradually move downward, thereby affecting the subsequent impact effect of the impact hammer 51 on the impact end 31;

[0041] At the same time, after the ejected drilling fluid is guided and directed by the guide cylinder 42, the ejected drilling fluid can smoothly impact the upper end of the impact hammer 51, so that the impact hammer 51 can fully impact the impact end 31, transmit the impact force to the drill bit, and impact the side of the impact hammer 51 after the impact hammer 51 leaves the bottom of the connecting hole 41, so that the drilling fluid pushes the impact hammer 51 and the rotating plate 5 to smoothly rotate, change the position of the impact hammer 51, and rotate the impact hammer 51;

[0042] At the same time, after the guide tube 42 guides the ejected drilling fluid, the ejected drilling fluid can contact the impact hammer 51 as much as possible, reducing the contact and impact between the drilling fluid and the rotating plate 5, and preventing the rotating plate 5 from being unable to rotate smoothly after being subjected to excessive force.

[0043] As an embodiment of the present invention, the impact hammer 51 is installed obliquely on the rotating plate 5, and the impact hammers 51 on the rotating plate 5 have the same inclination direction, and the liquid discharged from the outlet of the guide cylinder 42 faces the upper surface of the impact hammer 51;

[0044] Since the impact hammer 51 is installed obliquely on the rotating plate 5, after the impact hammer 51 rotates to the bottom of the guide cylinder 42, the ejected drilling fluid will directly impact the upper surface of the impact hammer 51, so that the impact hammer 51 moves downward rapidly and impacts the impact end 31, so as to transmit the impact force to the drill bit and increase the drilling speed. At the same time, after the impact hammer 51 leaves the bottom of the guide cylinder 42, the obliquely installed impact hammer 51 can also make the drilling fluid ejected from the guide cylinder 42 accurately impact the side of the impact hammer 51, thereby pushing the impact hammer 51 and the rotating plate 5 to rotate, changing and rotating the position of the impact hammer 51, and avoiding the drilling fluid directly impacting the rotating plate 5 and affecting the normal rotation of the rotating plate 5.

[0045] At the same time, since the impact hammer 51 is set at an angle, when the impact hammer 51 moves downward, it will move obliquely downward. During this process, the force exerted by the impact hammer 51 on the impact end 31 is obliquely downward, that is, the impact end 31 will be subjected to axial and circumferential impact forces, so that the drill bit can be subjected to axial impact force and circumferential impact force at the same time, so as to improve the drilling effect of the drill bit and speed up the drilling speed.

[0046] As an embodiment of the present invention, a blocking protrusion 33 is provided on the surface of the impact end 31. One end of the blocking protrusion 33 is an arc-shaped inclined surface. The lower end of the impact hammer 51 just contacts the arc-shaped inclined surface on the blocking protrusion 33, and the lower end of the impact hammer 51 has a rounded corner;

[0047] Due to the flat and smooth surface of the impact end 31 and the rotation of the impact hammer 51 along with the rotating plate 5, when the impact hammer 51 impacts the impact end 31, there is a possibility that the impact hammer 51 slides along the surface of the impact end 31, affecting the impact effect of the impact hammer 51 on the impact end 31 and the transmission of the impact force. At the same time, by providing the blocking protrusion 33 on the surface of the impact end 31, when the impact hammer 51 contacts the impact end 31, the impact hammer 51 is not likely to slide on the surface of the impact end 31, so that the impact force carried by the impact hammer 51 is transmitted to the impact end 31 as completely as possible. After that, with the rotation of the rotating plate 5, the impact hammer 51 will slide slightly upward under the action of the arc-shaped inclined surface of the blocking protrusion 33 to enable the impact hammer 51 to cross over the blocking protrusion 33. Under the action of the rotating plate 5, the impact hammer 51 is driven to leave the lower part of the guiding cylinder 42. Then, the impact hammer 51 will move upward under the action of the magnetic block 32 installed on the impact end 31 and return to its initial position.

[0048] As an embodiment of the present invention, a guiding groove 53 is provided on the side surface of the rotating plate 5, and the guiding groove 53 is arranged obliquely;

[0049] After the ejected drilling fluid impacts the impact hammer 51, the drilling fluid will be dispersed and distributed in the space between the mounting block 4 and the rotating plate 5. Then, this part of the drilling fluid will pass through the gap between the rotating plate 5 and the connecting cylinder 2 and enter the space below the rotating plate 5. Finally, it passes through the lower connecting head 3 and is discharged to the bottom of the well from the drill bit;

[0050] During this process, when the drilling fluid passes through the gap between the rotating plate 5 and the connecting cylinder 2, the drilling fluid will be guided by the guiding groove 53 and the drilling fluid will generate a pushing effect on the rotating plate 5, further causing the rotating plate 5 to rotate. Combining with the impact effect of the ejected drilling fluid on the impact hammer 51, the rotation of the rotating plate 5 is made more stable and rapid, thus ensuring the normal rotation of the impact hammer 51.

[0051] As an embodiment of the present invention, multiple groups of magnetic blocks 32 are provided on the impact end 31. The magnetic blocks 32 are independent of each other and do not contact each other. The magnetic blocks 32 are not installed at the part of the impact end 31 that contacts the impact hammer 51;

[0052] The magnetic block 32 is composed of an intermediate block 321, a left magnetic block 322, and a right magnetic block 323. The magnetic field intensities of the left magnetic block 322 and the right magnetic block 323 are less than the magnetic field intensity of the intermediate block 321;

[0053] Since the impact hammer 51 returns to its initial position by the magnetic repulsive force of the magnetic block 32 after impacting the impact end 31, a magnetic block 32 is not installed at the part of the impact end 31 that comes into contact with the impact hammer 51, so as to avoid the impact force of the impact hammer 51 being reduced by the influence of the magnetic block 32 when the impact hammer 51 impacts the impact end 31. Similarly, by setting the magnetic field intensity of the intermediate block 321 to be the largest, the part of the impact end 31 that contacts the impact hammer 51 is between the two magnetic blocks 32, and the magnetic field intensity at this contact part is relatively the smallest, thereby reducing the influence of the magnetic repulsive force on the impact hammer 51 during the impact process, ensuring that the impact force of the impact hammer 51 on the impact end 31 is large, so as to improve the drilling speed of the drill bit.

[0054] As an implementation manner of the present invention, a guide ring 54 is installed on the rotating plate 5, the impact hammer 51 passes through the middle of the guide ring 54, positioning balls are arranged on the guide ring 54, and grooves are arranged on the surface of the impact hammer 51, and the positioning balls and the grooves match each other;

[0055] By installing the guide ring 54 on the rotating plate 5, the movement process of the impact hammer 51 is protected to prevent the impact hammer 51 from shaking, skewing, etc. during the movement process. At the same time, through the arranged guide ring 54, the installation hole of the impact hammer 51 on the rotating plate 5 is protected and sealed, reducing the possibility of drilling fluid passing through the installation hole where the impact hammer 51 is installed on the rotating plate 5, so as to ensure that the impact hammer 51 can smoothly move downward under the action of the ejected drilling fluid;

[0056] At the same time, by installing positioning balls in the guide ring 54 to match the grooves on the surface of the impact hammer 51, the impact hammer 51 will not rotate relative to the rotating plate 5 during the up and down movement process, ensuring that the angles between the impact hammer 51 and the rotating plate 5, and between the impact hammer 51 and the impact end 31 remain unchanged, and avoiding that after the impact hammer 51 rotates, the impact between the lower end of the impact hammer 51 and the impact end 31 cannot be carried out smoothly or is incomplete, affecting the drilling effect and drilling speed of the drill bit.

[0057] The specific working process is as follows:

[0058] During the drilling process, the drill bit on the lower connector 3 presses against the formation at the bottom of the well. Driven by the drill rig on the ground, the drill pipe, the speed-up tool, and the drill bit rotate synchronously to drill the formation, and the drilling fluid is sent into the well through the mud pump;

[0059] During the pumping process of the drilling fluid, the drilling fluid will pass through the upper connector 1 and enter the connecting cylinder 2. Under the action of pressure, the drilling fluid will spray out from the communication holes 41. The sprayed drilling fluid impacts obliquely on the rotating plate 5 and the impact hammer 51 on the rotating plate 5. At the same time, through the impact of the drilling fluid on the side of the impact hammer 51, it will push the impact hammer 51 and the rotating plate 5 to rotate, thereby causing a relative change in the position of the impact hammer 51, that is, the impact hammer 51 gradually reaches below the communication hole 41;

[0060] During this process, the impact hammer 51 will move downward rapidly, causing the impact hammer 51 to impact the impact end 31 on the lower connector 3, and then transmitting the impact force to the drill bit;

[0061] At the same time, when the impact hammer 51 rotates away from below the communication hole 41, the mutually repulsive magnetic force between the impact hammer 51 and the magnetic block 32 on the impact end 31 causes the position of the impact hammer 51 to return to the initial position;

[0062] At the same time, due to the gap between the rotating plate 5 and the connecting cylinder 2, after the drilling fluid sprayed from the communication hole 41 impacts the impact hammer 51, the drilling fluid will pass through the gap between the rotating plate 5 and the connecting cylinder 2 and reach below the rotating plate 5. After that, the drilling fluid will pass through the lower connector 3 and finally be discharged from the drill bit to the bottom of the well;

[0063] By setting multiple groups of communication holes 41 and impact hammers 51, the drilling fluid sprayed from the communication holes 41 is evenly distributed on the impact hammer 51;

[0064] At the same time, since the impact hammer 51 is slidably installed on the rotating plate 5 up and down, and the rotating plate 5 rotates around the connecting column 52, through the evenly distributed communication holes 41 and impact hammers 51, the acting forces on the rotating plate 5 and the impact hammer 51 can be evenly distributed;

[0065] By installing the guiding cylinder 42 on the mounting block 4 to guide and restrict the sprayed drilling fluid, the sprayed drilling fluid can smoothly impact the upper end of the impact hammer 51;

[0066] Since the impact hammer 51 is obliquely installed on the rotating plate 5, after the impact hammer 51 rotates below the guiding cylinder 42, the sprayed drilling fluid will directly impact the upper surface of the impact hammer 51, so that the impact hammer 51 moves downward rapidly and impacts the impact end 31, in order to transmit the impact force to the drill bit;

[0067] At the same time, due to the inclined setting of the impact hammer 51, when the impact hammer 51 moves downward, it will move obliquely downward. During this process, the acting force of the impact hammer 51 on the impact end 31 is obliquely downward, that is, the impact end 31 will receive axial and circumferential component impact forces, so that the drill bit can receive axial impact force and circumferential impact force simultaneously;

[0068] Meanwhile, a blocking protrusion 33 is provided on the surface of the impact end 31, so that when the impact hammer 51 contacts the impact end 31, the impact hammer 51 is not likely to slide on the surface of the impact end 31, thereby enabling the impact force carried by the impact hammer 51 to be transmitted to the impact end 31 as completely as possible. After that, as the rotating plate 5 rotates, the impact hammer 51 will slide slightly upward under the action of the arc-shaped inclined surface of the blocking protrusion 33, so as to enable the impact hammer 51 to cross over the blocking protrusion 33. Under the action of the rotating plate 5, the impact hammer 51 is driven to leave the lower part of the guide cylinder 42. After that, the impact hammer 51 will move upward under the action of the magnetic block 32 installed on the impact end 31 and return to its initial position;

[0069] After the ejected drilling fluid impacts the impact hammer 51, the drilling fluid will be dispersed and distributed in the space between the mounting block 4 and the rotating plate 5. After that, this part of the drilling fluid will pass through the gap between the rotating plate 5 and the connecting cylinder 2 and enter the space below the rotating plate 5, and finally pass through the lower connector 3 and be discharged to the bottom of the well from the drill bit;

[0070] During this process, when the drilling fluid passes through the gap between the rotating plate 5 and the connecting cylinder 2, the drilling fluid will be guided by the guide groove 53, and the drilling fluid will produce a pushing effect on the rotating plate 5, further causing the rotating plate 5 to rotate;

[0071] Since the impact hammer 51 returns to its initial position by the magnetic repulsive force of the magnetic block 32 after impacting the impact end 31, therefore, the magnetic block 32 is not installed at the part of the impact end 31 that contacts the impact hammer 51. Similarly, by setting the magnetic field intensity of the intermediate block 321 to be the largest, the part of the impact end 31 that contacts the impact hammer 51 is between the two magnetic blocks 32, and the magnetic field intensity at this contact part is relatively the smallest;

[0072] By installing a guide ring 54 on the rotating plate 5, the movement process of the impact hammer 51 is protected to prevent the impact hammer 51 from jittering, skewing, etc. during the movement process;

[0073] Meanwhile, by installing positioning balls in the guide ring 54 to match the grooves on the surface of the impact hammer 51, the impact hammer 51 will not rotate relative to the rotating plate 5 during the up and down movement process.

[0074] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary impact speed-up tool applicable to hard rock speed-up, comprising a connecting cylinder (2), with an upper connector (1) and a lower connector (3) respectively installed at both ends of the connecting cylinder (2), and one end of the lower connector (3) facing the upper connector (1) being the impact end (31); It is characterized in that: An installation block (4) is installed inside the connecting cylinder (2), a rotating plate (5) is installed below the installation block (4), the rotating plate (5) is rotatably installed on the installation block (4) through a connecting column (52), a communication hole (41) is opened on the installation block (4), and the outlet of the communication hole (41) is inclined towards the rotating plate (5); An impact hammer (51) is installed on the rotating plate (5), the impact hammer (51) is in contact with the impact end (31), a magnetic block (32) is installed on the impact end (31), the impact hammer (51) and the magnetic block (32) repel each other, and the impact hammer (51) can freely move up and down on the rotating plate (5); A guide cylinder (42) is installed on the lower surface of the installation block (4), the outlet direction of the guide cylinder (42) is the same as the outlet direction of the communication hole (41), and the inner diameter of the guide cylinder (42) is greater than or equal to the diameter of the impact hammer (51); The impact hammer (51) is installed obliquely on the rotating plate (5), the impact hammers (51) on the rotating plate (5) have the same oblique direction, and the liquid discharged from the outlet of the guide cylinder (42) is exactly opposite to the upper surface of the impact hammer (51); Multiple groups of magnetic blocks (32) are arranged on the impact end (31), and no magnetic block (32) is installed at the part of the impact end (31) in contact with the impact hammer (51); The magnetic block (32) is composed of an intermediate block (321), a left magnetic block (322), and a right magnetic block (323), and the magnetic field intensities of the left magnetic block (322) and the right magnetic block (323) are less than the magnetic field intensity of the intermediate block (321).

2. The rotary impact acceleration tool applicable to hard rock acceleration according to claim 1, wherein: The communication holes (41) on the installation block (4) are evenly distributed around its center line, and the impact hammers (51) are evenly distributed on the rotating plate (5) around the connecting column (52).

3. A rotary impact speed-up tool applicable to hard rock speed-up according to claim 2, characterized in that: Blocking protrusions (33) are arranged on the surface of the impact end (31), one end of the blocking protrusion (33) is an arc-shaped inclined surface, and the lower end of the impact hammer (51) just contacts the arc-shaped inclined surface on the blocking protrusion (33).

4. A rotary impact speed-up tool applicable to hard rock speed-up according to claim 1, characterized in that: A guide groove (53) is opened on the side surface of the rotating plate (5), and the guide groove (53) is arranged obliquely.

5. A rotary impact speed-up tool suitable for hard rock speed-up according to claim 1, characterized in that: A guide ring (54) is installed on the rotating plate (5), the impact hammer (51) passes through the middle of the guide ring (54), positioning balls are arranged on the guide ring (54), and grooves are arranged on the surface of the impact hammer (51), and the positioning balls and the grooves match each other.

Images