A high-energy water-pressure down-the-hole hammer based on impact rotary drilling technology

Abstract

The present invention provides a high-energy water-pressure down-the-hole hammer based on impact rotary drilling technology. The structure of the high-energy water-pressure down-the-hole hammer based on impact rotary drilling technology includes an upper sub, a housing, a filter fixing sleeve, a drain valve cover, a fixed valve sleeve, a main valve, a piston hammer, a drill bit, a first support sleeve, a second support sleeve, a first sealing piston, a second sealing piston, a guide sleeve, a stop ring, and a fixed casing. The hammer internally is provided with a first chamber, a second chamber, a third chamber, and a control chamber. The main valve moves up and down along the cylindrical chamber inside the fixed valve sleeve, and the piston hammer moves up and down along the annular groove inside the fixed valve sleeve. Inside the fixed valve sleeve, there are provided a first control flow channel, a second control flow channel, and a third control flow channel that connect the four chambers and the outside. The high-pressure clear water in the first chamber pressurizes and depressurizes the second chamber, the third chamber, and the control chamber through the three control flow channels. The up and down movement of the main valve, the accelerated impact and decelerated braking of the piston hammer are mainly achieved by relying on the static pressure of the high-pressure clear water, driving the piston to do work, performing high-frequency heavy-load impacts on the rock, and improving the pump pressure and drilling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical fields of deep well hard formation mining and oil and gas energy mining, and specifically to a high-energy water pressure down-the-hole hammer based on impact rotary drilling technology. Background Art

[0002] At present, with the rapid development of industrial production, the rapid growth of high-tech manufacturing industries and equipment manufacturing industries, the demand for fossil energy such as oil and gas is increasing day by day. The shallow resources available for development are becoming increasingly exhausted. A large part of the oil resources are buried below the formation with a depth exceeding 5000m. As a more stable and cleaner fossil energy, natural gas is buried at a greater depth than the general oil layer. Drilling needs to develop in the direction of deep wells and ultra-deep wells. Relying solely on traditional rotary scraping to break rocks not only has low drilling efficiency, but also causes great damage to the drill bit and high costs. Therefore, there is an urgent need for a rapid drilling tool suitable for deep well hard formation mining.

[0003] Impact rotary drilling technology combines impact drilling and rotary drilling to break rocks under the dual action of impact crushing and rotary scraping. As the application object of impact rotary drilling technology, the impactor can realize impact rotary drilling, greatly improving the drilling and rock breaking efficiency. However, most of the commonly used hydraulic impactors have low impact work and relatively low impact frequency, and it is necessary to develop an impactor with high impact work and high-frequency rock breaking.

[0004] Commonly used hydraulic impactors rely on the dynamic pressure of the liquid medium, i.e., the water hammer effect, to push the piston hammer to do work, while the water pressure impactor mainly relies on the static pressure of water to push the piston hammer to do work. The water pressure is much higher than that of the hydraulic impactor, and the pump pressure and drilling efficiency are also greatly improved, enabling efficient rock breaking and drilling. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-energy water pressure down-the-hole hammer based on impact rotary drilling technology, which mainly relies on the static pressure of water to push the piston hammer to accelerate downward and impact the drill bit, increasing the final velocity of the piston hammer impact, efficiently transferring most of the energy to the drill bit, performing efficient rock breaking, and improving the drilling efficiency.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A high-energy water pressure down-the-hole hammer based on impact rotary drilling technology, the main structure of which includes an upper sub, a housing, a filter fixing sleeve, a drainage valve cover, a fixed valve sleeve, a main valve, a piston hammer and a drill bit; the upper sub is threadedly connected to the housing; the upper sub, the housing and the drill bit form a chamber containing all parts; a first flow channel penetrating the drill bit is provided in the drill bit; it is characterized in that: a filter fixing sleeve, a drainage valve cover, a fixed valve sleeve, a main valve and a piston hammer are arranged in the chamber from top to bottom; a first drainage hole is provided on the filter fixing sleeve; a second drainage hole is provided on the drainage valve cover; a fan-shaped pressure relief hole is circumferentially provided on the main valve; a non-penetrating fourth flow channel is provided on the main valve; a penetrating third flow channel is provided on the fixed valve sleeve; an annular groove and a cylindrical chamber are formed inside the fixed valve sleeve; the piston hammer slides up and down along the annular groove; a penetrating second flow channel is provided on the piston hammer; and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are communicated;

[0008] The housing is provided with a positioning shoulder; a first sealing piston and a second sealing piston are arranged inside the housing; a first support sleeve and a second support sleeve are arranged inside the housing; the first sealing piston is tightly pressed on the positioning shoulder by the first support sleeve; the second sealing piston is tightly pressed on the first support sleeve by the second support sleeve; the drainage valve cover is tightly pressed on the fixed valve sleeve by the filter fixing sleeve; the fixed valve sleeve is fixed by the drainage valve cover and the second support sleeve; the upper surface of the filter fixing sleeve abuts against the upper sub;

[0009] The main valve slides up and down along the cylindrical chamber of the fixed valve sleeve; and the main valve is coaxial with the fixed valve sleeve; a control chamber is formed between the main valve and the fixed valve sleeve;

[0010] The space between the filter fixing sleeve and the second sealing piston is divided into a first chamber and a third chamber by the drainage valve cover, the fixed valve sleeve and the piston hammer; the annular groove and the upper surface of the piston hammer form a second chamber;

[0011] The fixed valve sleeve is provided with a normally open flow channel communicating the first chamber and the third chamber; the fixed valve sleeve is provided with a first control flow channel communicating the first chamber and the second chamber; the fixed valve sleeve is provided with a second control flow channel communicating the control chamber and the third chamber; the fixed valve sleeve is provided with a third control flow channel communicating the control chamber and the second flow channel;

[0012] When the main valve moves up and down, the first chamber and the second chamber are intermittently communicated through the first control flow channel, and the second chamber and the fourth flow channel are intermittently communicated through the first control flow channel; when the piston hammer moves up and down, the control chamber and the third chamber are intermittently communicated through the second control flow channel, and the control chamber and the second flow channel are intermittently communicated through the third control flow channel.

[0013] As a preferred embodiment, the inside of the filter fixed sleeve is used to place the filter; 24 first drainage holes are provided in the circumferential direction of the filter fixed sleeve to drain the high-pressure clear water to the first chamber.

[0014] As a preferred embodiment, a fixed valve sleeve groove is provided at the top of the fixed valve sleeve, and the drainage valve cover is pressed by the filter fixed sleeve on the fixed valve sleeve groove; 12 second drainage holes are provided in the circumferential direction of the drainage valve cover, so that part of the high-pressure clear water in the first chamber intermittently flows into the first control flow channel through the second drainage holes; a sealing device is provided between the fixed valve sleeve and the housing.

[0015] As a preferred embodiment, the lower part of the main valve is embedded in the inner wall of the third flow channel in a stepped column shape, coaxial with the fixed valve sleeve, and moves up and down along the inner wall of the third flow channel and the cylindrical chamber; 5 fan-shaped pressure relief holes are provided above the main valve; when the main valve slides up and down, the fan-shaped pressure relief holes are intermittently communicated with the first control flow channel; the area of the upper ring surface of the control chamber is 1.5 to 2 times the area of the upper end surface of the main valve.

[0016] As a preferred embodiment, 4 constant flow channels connecting the first chamber and the third chamber are provided in the circumferential direction of the fixed valve sleeve; 4 first control flow channels connecting the first chamber and the second chamber are provided in the upper half of the fixed valve sleeve; 4 second control flow channels connecting the control chamber and the third chamber are provided in the lower half of the fixed valve sleeve; 4 third control flow channels connecting the control chamber and the second flow channel are provided inside the annular groove.

[0017] As a preferred embodiment, a first step surface, a second step surface and a third step surface are provided on the outer surface of the piston hammer; the areas of the first step surface and the second step surface are the same, and the area of the third step surface is 2 to 3 times that of the second step surface.

[0018] As a preferred embodiment, sealing devices are provided between the first sealing piston and the second sealing piston and the housing and the piston hammer.

[0019] As a preferred embodiment, a piston hammer groove is provided on the inner surface of the piston hammer; when the piston hammer moves up and down, the second flow channel and the third control flow channel are intermittently communicated.

[0020] As a preferred embodiment, a guide sleeve, a stop ring and a fixing sleeve are provided below the positioning shoulder; the fixing sleeve is fixedly connected to the housing by means of a thread; the stop ring and the guide sleeve are pressed tightly against the positioning shoulder by the fixing sleeve.

[0021] As a preferred embodiment, the outer part of the fixing sleeve is connected to the housing by means of a thread, and a spline is provided inside to restrict the circumferential rotation of the drill bit.

[0022] Compared with the existing hydraulic impactor, the features and advantages of the present invention are:

[0023] The present invention provides a high-energy water pressure down-the-hole hammer based on impact rotary drilling technology. By controlling the up-and-down movement of the main valve through the static water pressure, the control flow passage in the fixed valve sleeve is further controlled to communicate with each chamber and the outside world, and each chamber is pressurized and depressurized to realize the accelerated movement and decelerated braking of the piston hammer, improve the impact work and impact frequency of the piston hammer, and achieve the purpose of efficiently and rapidly breaking rocks and improving the efficiency of hard formation and oil and gas exploitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the device of the present invention in the initial state;

[0025] Figure 2 is of the present invention Figure 1 A-A sectional view;

[0026] Figure 3 is of the present invention Figure 1 partial enlarged view;

[0027] Figure 4 is a schematic structural diagram of the device of the present invention when the piston hammer is at the top dead center;

[0028] Figure 5 is of the present invention Figure 4 partial enlarged view;

[0029] Figure 6 is a schematic structural diagram of the fixed valve sleeve of the present invention;

[0030] Figure 7 is a schematic structural diagram of the main valve of the present invention;

[0031] Figure 8 is a schematic structural diagram of the drill bit of the present invention;

[0032] In the figure: 1. Upper joint; 2. Housing; 21. Positioning shoulder; 3. First chamber; 4. Fixed valve sleeve; 41. First control flow channel; 42. Second control flow channel; 43. Third control flow channel; 44. Third flow channel; 45. Constant flow channel; 46. Fixed valve sleeve cylindrical chamber; 47. Fixed valve sleeve annular groove; 48. Fixed valve sleeve groove; 5. Second chamber; 6. Piston hammer; 61. First step surface; 62. Second step surface; 63. Third step surface; 64. Piston hammer groove; 65. Second flow channel; 7. Third chamber; 8. Second support sleeve; 9. Second sealing piston; 10. First support sleeve; 11. First sealing piston; 12. Guide sleeve; 13. Stop ring; 14. Fixed casing; 15. Drill bit; 16. Filter fixed sleeve; 161. First drainage hole; 17. Drainage valve cover; 171. Second drainage hole; 18. Main valve; 181. Sector-shaped pressure relief hole; 182. Fourth flow channel; 19. Control chamber. Detailed implementation mode

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "top", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] The following describes some embodiments of the high-energy hydraulic down-the-hole hammer based on impact rotary drilling technology of the present invention with reference to the accompanying drawings:

[0035] The present invention mainly aims at the high-energy hydraulic down-the-hole hammer based on the impact rotary drilling technology, as Figure 1 shown, the structure of the impactor includes an upper joint 1, a housing 2, a filter fixed sleeve 16, a drainage valve cover 17, a fixed valve sleeve 4, a main valve 18, a piston hammer 6 and a drill bit 15; the upper joint 1 and the housing 2 are connected by threads; the upper joint 1, the housing 2 and the drill bit 15 form a chamber containing all parts; as Figure 8 shown, a first flow channel 151 penetrating the drill bit 15 is provided in the drill bit 15; a filter fixed sleeve 16, a drainage valve cover 17, a fixed valve sleeve 4, a main valve 18 and a piston hammer 6 are arranged in the chamber from top to bottom; a first drainage hole 161 is provided on the filter fixed sleeve 16; a second drainage hole 171 is provided on the drainage valve cover 17; as Figure 7 shown, a sector-shaped pressure relief hole 181 and a non-penetrating fourth flow channel 182 are circumferentially provided on the main valve 18; as Figure 6As shown, a through third flow channel 44 is provided on the fixed valve sleeve 4; an annular groove 47 and a cylindrical chamber 46 are formed inside the fixed valve sleeve 4; the piston hammer 6 slides up and down along the annular groove 47; a through second flow channel 65 is provided on the piston hammer 6; and the first flow channel 151, the second flow channel 65, the third flow channel 44 and the fourth flow channel 182 are communicated with each other.

[0036] The housing 2 is provided with a positioning shoulder 21; a first sealing piston 11 and a second sealing piston 9 are arranged inside the housing 2; a first support sleeve 10 and a second support sleeve 8 are arranged inside the housing 2; the first sealing piston 11 is tightly pressed on the positioning shoulder 21 by the first support sleeve 10; the second sealing piston 9 is tightly pressed on the first support sleeve 10 by the second support sleeve 8; the drainage valve cover 17 is tightly pressed on the fixed valve sleeve 4 by the filter fixing sleeve 16; the fixed valve sleeve 4 is fixed by the drainage valve cover 17 and the second support sleeve 8; the upper surface of the filter fixing sleeve 16 abuts against the upper joint 1.

[0037] The main valve 18 slides up and down along the cylindrical chamber 46 of the fixed valve sleeve 4; and the main valve 18 is coaxial with the fixed valve sleeve 4; a control chamber 19 is formed between the main valve 18 and the fixed valve sleeve 4.

[0038] The space between the filter fixing sleeve 16 and the second sealing piston 9 is divided into a first chamber 3 and a third chamber 7 by the drainage valve cover 17, the fixed valve sleeve 4 and the piston hammer 6; the annular groove 47 and the upper surface of the piston hammer 6 form a second chamber 5.

[0039] The fixed valve sleeve 4 is provided with a normally open flow channel 45 communicating the first chamber 3 and the third chamber 7; the fixed valve sleeve 4 is provided with a first control flow channel 41 communicating the first chamber 3 and the second chamber 5; the fixed valve sleeve 4 is provided with a second control flow channel 42 communicating the control chamber 19 and the third chamber 7; the fixed valve sleeve 4 is provided with a third control flow channel 43 communicating the control chamber 19 and the second flow channel 65.

[0040] When the main valve 18 moves up and down, the first chamber 3 and the second chamber 5 are intermittently communicated through the first control flow channel 41, and the second chamber 5 and the fourth flow channel 182 are intermittently communicated through the first control flow channel 41; when the piston hammer 6 moves up and down, the control chamber 19 and the third chamber 7 are intermittently communicated through the second control flow channel 42, and the control chamber 19 and the second flow channel 65 are intermittently communicated through the third control flow channel 43.

[0041] Further, the inside of the filter fixing sleeve 16 is used to place a filter; 24 first drainage holes 161 are circumferentially formed in the filter fixing sleeve 16 to drain high-pressure clear water to the first chamber 3.

[0042] Further, a valve fixing sleeve groove 48 is formed at the top of the valve fixing sleeve 4, and the drainage valve cover 17 is pressed by the filter fixing sleeve 16 on the valve fixing sleeve groove; 12 second drainage holes 171 are circumferentially arranged on the drainage valve cover 17, so that part of the high-pressure clear water in the first chamber 3 intermittently flows into the first control flow channel 41 through the second drainage holes 171; a sealing device is arranged between the valve fixing sleeve 4 and the housing 2.

[0043] Further, the lower part of the main valve 18 is embedded in the inner wall of the third flow channel 44 in a stepped column shape, coaxial with the valve fixing sleeve 4, and moves up and down along the inner wall of the third flow channel 44 and the cylindrical chamber 46; 5 sector-shaped pressure relief holes 181 are arranged above the main valve 18; when the main valve 18 slides up and down, the sector-shaped pressure relief holes 181 are intermittently communicated with the first control flow channel 41; the area of the upper ring surface of the control chamber 19 is 1.5 to 2 times the area of the upper end surface of the main valve 18.

[0044] Further, 4 constant flow channels 45 communicating the first chamber 3 and the third chamber 7 are circumferentially arranged on the valve fixing sleeve 4; 4 first control flow channels 41 communicating the first chamber 3 and the second chamber 5 are arranged in the upper half of the valve fixing sleeve 4; 4 second control flow channels 42 communicating the control chamber 19 and the third chamber 7 are arranged in the lower half of the valve fixing sleeve 4; 4 third control flow channels 43 communicating the control chamber 19 and the second flow channel 65 are arranged inside the annular groove 47.

[0045] Further, a first step surface 61, a second step surface 62 and a third step surface 63 are arranged on the outer surface of the piston hammer 6; the areas of the first step surface 61 and the second step surface 62 are the same, and the area of the third step surface 63 is 2 to 3 times that of the second step surface 62.

[0046] Further, sealing devices are arranged between the first sealing piston 11 and the second sealing piston 9 and the housing 2 and the piston hammer 6.

[0047] Further, a piston hammer groove 64 is arranged on the inner surface of the piston hammer 6; when the piston hammer 6 moves up and down, the second flow channel 65 is intermittently communicated with the third control flow channel 43.

[0048] Further, a guiding sleeve 12, a stop ring 13 and a fixing sleeve 14 are arranged below the positioning shoulder 21; the fixing sleeve 14 is fixedly connected to the housing 2 by means of screw connection; the stop ring 13 and the guiding sleeve 12 are pressed tightly on the positioning shoulder 21 by the fixing sleeve 14.

[0049] Further, the outer part of the fixing sleeve 14 is threadedly connected to the housing 2, and splines are arranged inside to restrict the circumferential rotation of the drill bit 15.

[0050] The working process of the present invention in the drilling operation is as follows:

[0051] A high-energy water-pressure down-the-hole hammer based on the impact rotary drilling technology. In the initial state, under the action of gravity, the lower step surface of the main valve 18 is in contact with the fixed valve sleeve 4, and under the action of gravity, the lower end of the piston hammer 6 is in contact with the upper end of the drill bit 15. The fan-shaped pressure relief hole 181 above the main valve 18 is not communicated with the first control flow channel 41 inside the fixed valve sleeve 4, the second control flow channel 42 is communicated with the third chamber 7, and due to the blockage of the piston hammer 6, the third control flow channel 43 is not communicated with the second flow channel 65. At this time, the first chamber 3 is communicated with the second chamber 5 through the second drainage hole 171 on the drainage valve cover 17 and the first control flow channel 41, and the third chamber 7 is communicated with the control chamber 19 through the second control flow channel 42. High-pressure clear water flows into the first chamber 3 from the upper joint 1 through the first drainage hole 161 on the filter fixing sleeve 16. Part of the high-pressure clear water enters the first control flow channel 41 through the 12 second drainage holes 171 on the drainage valve cover 17, enters the second chamber 5 through the first control flow channel 41, part of the high-pressure clear water enters the third chamber 7 through the constant flow channel 45 around the fixed valve sleeve 4, and enters the control chamber 19 and the third control flow channel 43 through the second control flow channel 42. At this time, the first chamber 3, the second chamber 5, the third chamber 7, the control chamber 19, the first control flow channel 41, the second control flow channel 42 and the third control flow channel 43 are all filled with high-pressure clear water and continuously pressurized. Because the area of the upper end surface of the piston hammer 6 is much larger than the areas of the first step surface 61, the second step surface 62 and the third step surface 63 below, the piston hammer 6 remains stationary at this time. The area of the upper ring surface of the control chamber 19 is 1.5 to 2 times the area of the upper end surface of the main valve 18. The main valve 18 moves upward by a certain distance under the action of the pressure difference, so that the fan-shaped pressure relief hole 181 on the main valve 18 is communicated with the first control flow channel 41 on the fixed valve sleeve 4. The high-pressure clear water in the second chamber 5 is communicated with the fourth flow channel 182 through the first control flow channel 41 and the fan-shaped pressure relief hole 181 on the main valve 18, and then communicated with the outside. At this time, the second chamber 5 is in a low-pressure state. The high-pressure clear water in the third chamber 7 acts on the first step surface 61, the second step surface 62 and the third step surface 63 on the outer surface of the piston hammer 6, so that the piston hammer 6 accelerates upward.

[0052] After the piston hammer 6 accelerates upward for a certain distance, it will block the connection between the second control flow channel 42 and the third chamber 7. At this time, the second control flow channel 42, the control chamber 19, and the third control flow channel 43 are all filled with high-pressure clear water, keeping the main valve 18 stationary. The high-pressure clear water in the third chamber 7 continues to act on the third stepped surface 63 on the outer surface of the piston hammer 6, causing the piston hammer 6 to continue accelerating upward. When the piston hammer 6 continues to move upward for a certain distance, the piston hammer groove 64 on the inner surface of the piston hammer 6 connects the second flow channel 65 with the third control flow channel 43. The high-pressure clear water in the control chamber 19 is connected to the second flow channel 65 through the third control flow channel 43, and then to the outside world, putting the control chamber 19 in a low-pressure state. The upper end surface of the main valve 18 is affected by the pressure of the high-pressure clear water, causing the main valve 18 to move downward a certain distance under the pressure difference, so that the sector-shaped pressure relief hole 181 on the main valve 18 is not connected to the first control flow channel 41 on the fixed valve sleeve 4. At this time, part of the high-pressure clear water in the first chamber 3 continues to enter the first control flow channel 41 through the 12 second drainage holes 171 on the drainage valve cover 17, enters the second chamber 5 through the first control flow channel 41, pressurizes the second chamber 5, and causes the piston hammer 6 to enter the upward deceleration stage.

[0053] When the piston hammer 6 runs to the top dead center, under the action of the high-pressure clear water in the second chamber 5, the piston hammer 6 starts to accelerate downward and hits the drill bit 15. After the piston hammer 6 moves downward a certain distance, it blocks the connection between the second flow channel 65 and the third control flow channel 43. Just before the piston hammer 6 hits the drill bit 15, the second control flow channel 42 is connected to the third chamber 7, and the piston hammer 6 hits the drill bit 15 due to inertia. The high-pressure clear water in the third chamber 7 enters the control chamber 19 and the third control flow channel 43 through the second control flow channel 42. The main valve 18 moves upward a certain distance under the pressure difference between the upper and lower sides, so that the sector-shaped pressure relief hole 181 on the main valve 18 is connected to the first control flow channel 41 on the fixed valve sleeve 4. The high-pressure clear water in the second chamber 5 is connected to the fourth flow channel 182 through the first control flow channel 41 and the sector-shaped pressure relief hole 181 on the main valve 18, and then to the outside world. The second chamber 5 is in a low-pressure state. The high-pressure clear water in the third chamber 7 acts on the first stepped surface 61, the second stepped surface 62, and the third stepped surface 63 on the outer surface of the piston hammer 6, causing the piston hammer 6 to accelerate in the reverse direction, and so on.

[0054] The basic principles, main features and advantages of the present invention have been shown and described above. As mentioned above, it is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above in a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the relevant art can, without departing from the technical solution of the present invention, make some changes or modifications using the technical content disclosed above to obtain equivalent embodiments with equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-energy water-pressure down-the-hole hammer based on impact rotary drilling technology, the main structure of which includes an upper sub (1), a housing (2), a filter fixing sleeve (16), a drainage valve cover (17), a fixed valve sleeve (4), a main valve (18), a piston hammer (6) and a drill bit (15); the upper sub (1) is threadedly connected to the housing (2); the upper sub (1), the housing (2) and the drill bit (15) form a chamber containing all parts; a first flow channel (151) penetrating the drill bit (15) is provided in the drill bit (15). It is characterized in that: The filter fixing sleeve (16), the drainage valve cover (17), the fixed valve sleeve (4), the main valve (18) and the piston hammer (6) are arranged in the chamber from top to bottom; a first drainage hole (161) is provided on the filter fixing sleeve (16); a second drainage hole (171) is provided on the drainage valve cover (17); a fan-shaped pressure relief hole (181) is circumferentially provided on the main valve (18); a non-penetrating fourth flow channel (182) is provided on the main valve (18); a penetrating third flow channel (44) is provided on the fixed valve sleeve (4); an annular groove (47) and a cylindrical chamber (46) are formed inside the fixed valve sleeve (4); the piston hammer (6) slides up and down along the annular groove (47); a penetrating second flow channel (65) is provided on the piston hammer (6); and the first flow channel (151), the second flow channel (65), the third flow channel (44) and the fourth flow channel (182) are communicated with each other. The housing (2) is provided with a positioning shoulder (21); a first sealing piston (11) and a second sealing piston (9) are arranged inside the housing (2); a first support sleeve (10) and a second support sleeve (8) are arranged inside the housing (2); the first sealing piston (11) is tightly pressed on the positioning shoulder (21) by the first support sleeve (10); the second sealing piston (9) is tightly pressed on the first support sleeve (10) by the second support sleeve (8); the drainage valve cover (17) is tightly pressed on the fixed valve sleeve (4) by the filter fixing sleeve (16); the fixed valve sleeve (4) is fixed by the drainage valve cover (17) and the second support sleeve (8); the upper surface of the filter fixing sleeve (16) abuts against the upper sub (1). The main valve (18) slides up and down along the cylindrical chamber (46) of the fixed valve sleeve (4); and the main valve (18) is coaxial with the fixed valve sleeve (4); a control chamber (19) is formed between the main valve (18) and the fixed valve sleeve (4). The space between the filter fixing sleeve (16) and the second sealing piston (9) is divided into a first chamber (3) and a third chamber (7) by the drainage valve cover (17), the fixed valve sleeve (4) and the piston hammer (6); a second chamber (5) is formed by the annular groove (47) and the upper surface of the piston hammer (6). A constant flow channel (45) communicating the first chamber (3) and the third chamber (7) is formed on the fixed valve sleeve (4); a first control flow channel (41) communicating the first chamber (3) and the second chamber (5) is provided on the fixed valve sleeve (4); a second control flow channel (42) communicating the control chamber (19) and the third chamber (7) is provided on the fixed valve sleeve (4); a third control flow channel (43) communicating the control chamber (19) and the second flow channel (65) is provided on the fixed valve sleeve (4). When the main valve (18) moves up and down, the first chamber (3) and the second chamber (5) are intermittently communicated through the first control flow channel (41), and the second chamber (5) and the fourth flow channel (182) are intermittently communicated through the first control flow channel (41); when the piston hammer (6) moves up and down, the control chamber (19) and the third chamber (7) are intermittently communicated through the second control flow channel (42), and the control chamber (19) and the second flow channel (65) are intermittently communicated through the third control flow channel (43).

2. An ultra-high energy water pressure down-the-hole hammer based on impact rotary drilling technology according to claim 1, characterized in that: The filter fixing sleeve (16) is used to place a filter inside; 24 first drainage holes (161) are circumferentially formed on the filter fixing sleeve (16) to drain high-pressure clear water to the first chamber (3).

3. An ultra-high energy water pressure down-the-hole hammer based on impact rotary drilling technology according to claim 1, characterized in that: A fixed valve sleeve groove (48) is formed at the top of the fixed valve sleeve (4), and the drainage valve cover (17) is pressed on the fixed valve sleeve groove by the filter fixing sleeve (16); 12 second drainage holes (171) are circumferentially provided on the drainage valve cover (17) to allow part of the high-pressure clear water in the first chamber (3) to intermittently flow into the first control flow channel (41) through the second drainage holes (171); a sealing device is provided between the fixed valve sleeve (4) and the housing (2).

4. An ultra-high energy water pressure down-the-hole hammer based on impact rotary drilling technology according to claim 1, characterized in that: The lower part of the main valve (18) is embedded in the inner wall of the third flow channel (44) in a stepped column shape, coaxial with the fixed valve sleeve (4), and moves up and down along the inner wall of the third flow channel (44) and the cylindrical chamber (46); 5 fan-shaped pressure relief holes (181) are provided above the main valve (18); when the main valve (18) slides up and down, the fan-shaped pressure relief holes (181) are intermittently communicated with the first control flow channel (41); the area of the upper ring surface of the control chamber (19) is 1.5 to 2 times the area of the upper end surface of the main valve (18).

5. An ultra-high energy water pressure down-the-hole hammer based on impact rotary drilling technology according to claim 1, characterized in that: The fixed valve sleeve (4) is circumferentially provided with 4 constant flow channels (45) communicating the first chamber (3) and the third chamber (7); the upper half of the fixed valve sleeve (4) is provided with 4 first control channels (41) communicating the first chamber (3) and the second chamber (5); the lower half of the fixed valve sleeve (4) is provided with 4 second control channels (42) communicating the control chamber (19) and the third chamber (7); the inner side of the annular groove (47) is provided with 4 third control channels (43) communicating the control chamber (19) and the second channel (65).

6. The high-energy water-pressure down-the-hole hammer based on the impact rotary drilling technology according to claim 1, characterized in that: The outer surface of the piston hammer (6) is provided with a first step surface (61), a second step surface (62) and a third step surface (63); the areas of the first step surface (61) and the second step surface (62) are the same, and the area of the third step surface (63) is 2 to 3 times that of the second step surface (62).

7. The high-energy water-pressure down-the-hole hammer based on the impact rotary drilling technology according to claim 1, characterized in that: Sealing devices are arranged between the first sealing piston (11) and the second sealing piston (9) and the housing (2) and the piston hammer (6).

8. The high-energy water-pressure down-the-hole hammer based on the impact rotary drilling technology according to claim 1, characterized in that: The inner surface of the piston hammer (6) is provided with a piston hammer groove (64); when the piston hammer (6) moves up and down, the second channel (65) is intermittently communicated with the third control channel (43).

9. The high-energy water-pressure down-the-hole hammer based on the impact rotary drilling technology according to claim 1, characterized in that: A guide sleeve (12), a stop ring (13) and a fixed sleeve (14) are arranged below the positioning shoulder (21); the fixed sleeve (14) is fixedly connected to the housing (2) by thread; the stop ring (13) and the guide sleeve (12) are pressed against the positioning shoulder (21) by the fixed sleeve (14).

10. The high-energy water-pressure down-the-hole hammer based on the impact rotary drilling technology according to claim 9, characterized in that: The outer part of the fixed sleeve (14) is threadedly connected to the housing (2), and splines are arranged inside to restrict the circumferential rotation of the drill bit (15).

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