A large impact composite hydraulic hammer

Abstract

The present invention discloses a large-impact composite hydraulic hammer, which mainly comprises an upper joint, an upper shell, a lower shell, a diverter, an upper cam, a pendulum, a hammer, a lower joint and a drill bit; the drill bit is threadedly connected to the lower joint, the lower joint is threadedly connected to the lower shell, and the upper shell is threadedly connected to the upper joint; the upper shell is threadedly connected to the lower shell and is hollow inside to form a cavity, which is connected to the diverter, upper cam, pendulum and hammer in sequence from top to bottom; the diverter is fixed to the lower part of the upper joint by bolts; the upper cam is fixed to the upper part of the hammer by bolts; the pendulum is installed between the upper cam and the hammer; a sealing piston is provided between the bottom of the hammer and the lower shell, and a sealing device is provided between the sealing piston, the hammer and the lower shell; when drilling fluid flows in, the hammer is driven to reciprocate up and down to impact the drill bit under the action of pressure difference, and the pendulum is driven to swing left and right to impact the pendulum anvil through intermittent cooperation between the hammer, the upper cam and the pendulum, thereby realizing composite impact during the drilling process and improving rock breaking efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of oil drilling, in particular to a large-impact composite hydraulic hammer. Background Art

[0002] With the continuous advancement of oil and gas extraction technology, shallow oil and gas resources can no longer meet the demand for oil and gas production. Oil and gas production is shifting towards complex wells such as deep, ultra-deep, extended-reach, and horizontal wells. As drilling depths continue to increase, problems such as poor formation drillability, low ROP, and severe drill bit wear pose a severe challenge to increasing drilling speed. The application of impact rock breaking technology has significantly improved drilling efficiency in complex formations. Current ROP tools, such as impactors with a single axial impact function, are prone to transient "stick-slip" in hard formations, exacerbating drill bit wear. Impactors with a single circumferential impact function can effectively address the stick-slip problem in hard formations, but they cannot apply axial impact to increase drill bit penetration depth. These two types of impact tools have relatively limited impact modes. Therefore, it is crucial to develop a tool that can deliver high-impact impacts, is suitable for complex formations, and can further improve ROP in these formations.

[0003] Therefore, based on the fact that traditional impact tools have a single impact mode, the drill bit teeth are not deeply penetrated and are prone to the "stick-slip" effect, a large-impact composite hydraulic hammer is proposed, which can achieve large impact and reduce or eliminate the "stick-slip" effect of the drill bit. By applying axial impact, the drill bit penetration depth is increased and the mechanical penetration rate is improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a large-impact composite hydraulic hammer that utilizes the dual-action mechanism of axial impact and torsional impact to enhance the impact effect on rock and achieve the purpose of efficient rock breaking and rapid drilling.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A large-impact composite hydraulic hammer comprises a drill bit, a lower joint, a lower shell, an upper shell and an upper joint; the drill bit is threadedly connected to the lower part of the lower joint; the lower joint is threadedly connected to the lower part of the lower shell; the lower shell is threadedly connected to the lower part of the upper shell; the upper shell is threadedly connected to the lower part of the upper joint; the upper shell and the lower shell are hollow inside to form a cavity; it also includes a diverter, an upper cam, a movable valve, a pendulum and a hammer arranged from top to bottom inside the cavity; a first central flow channel is opened in the upper joint, a second central flow channel is opened in the lower joint, and a third central flow channel is opened in the drill bit; the second central flow channel is connected to the third central flow channel.

[0007] A pendulum anvil is provided at the lower part of the upper shell; the pendulum anvil is provided with a first radial groove, a first stepped hole and a third axial flow channel; the number of the first radial grooves is 3, and the number of the third axial flow channels is 3 to 6; a sealing device is provided between the first stepped hole and the outer cylindrical surface of the pendulum; a first cavity is formed between the pendulum anvil and the diverter.

[0008] A first stop is provided at the lower part of the lower shell; a sealing piston is provided between the lower part of the hammer and the first stop; the sealing piston is fixed on the first stop and a sealing device is provided between the sealing piston, the lower shell and the hammer; the pendulum anvil and the sealing piston are divided into a second cavity and a third cavity in the upper and lower parts by the hammer.

[0009] The bottom of the upper joint is provided with an annular array of threaded holes; the upper part of the diverter is provided with an annular array of through holes that cooperate with the threaded holes at the lower part of the upper joint, the number of which is 3 to 6; the diverter is provided with a first radial flow channel, a first axial flow channel and a first boss; the number of the first radial flow channels is 3 to 6, and the shape is circular, square, rectangular or elliptical; the number of the first axial flow channels is 3 to 6.

[0010] The upper cam is provided with threaded holes and circumferentially arranged cam teeth, the number of the threaded holes and the number of the cam teeth are both three; the upper cam is fixed to the upper part of the hammer by bolts;

[0011] The pendulum is installed between the upper cam and the hammer, and rests on the first radial slide groove; the pendulum is provided with a second axial flow channel, a first axial through hole and annular cam surfaces that are symmetrical up and down. When the hammer and the upper cam reciprocate up and down together, the pendulum is caused to swing left and right by intermittently contacting the upper and lower annular cams of the pendulum; the first axial through hole cooperates with the first boss, and the pendulum can swing along the circumference of the first boss, and the swing angle is 15°~60°; the first axial flow channel is intermittently connected to the second axial flow channel, and the size and number of the second axial flow channel are consistent with those of the first axial flow channel; the upper and lower symmetrical annular cam surfaces and the lower annular cam surfaces are provided with 3 cam teeth.

[0012] The movable valve is provided with a fifth central flow channel, a second radial flow channel and a first groove; the number of the second radial flow channels is 3 to 6, the second radial flow channels are intermittently connected to the fifth central flow channel, and the movable valve stroke is 30 to 100 mm.

[0013] The hammer is provided with a sixth center flow channel, a second groove, a threaded hole, a first radial through groove, an annular lower cam, a first step surface, a third groove and a second step surface; the sixth center flow channel is always connected with the fifth center flow channel, the second center flow channel and the third center flow channel; the number of the second grooves is 2 to 4; the pendulum is installed in the first radial through groove and can swing 15° to 60° circumferentially along the first radial through groove, and the size and number of the first radial through groove are consistent with the first radial slide groove; the live valve is installed in the third groove and can move axially along the third groove; the area of ​​the second step surface is 1.5 to 2 times the area of ​​the first step surface; the fifth center flow channel, the sixth center flow channel, the second center flow channel and the third center flow channel remain always connected; a fourth cavity is formed between the pendulum and the hammer, and the fourth cavity is intermittently connected with the fifth center flow channel; the hammer stroke is 40 to 100 mm.

[0014] A sealing piston is provided between the lower part of the hammer and the first platform; the sealing piston is fixed on the first platform, and sealing devices are provided between the sealing piston, the lower shell and the hammer; the sealing piston and the pendulum anvil are divided into a second cavity and a third cavity above and below by the hammer; the first cavity is always connected to the second cavity and the third cavity, and the drilling fluid in the first cavity enters the second cavity and the third cavity through the third axial flow channel.

[0015] The lower joint is provided with a second boss; the anti-drop block is installed in the second groove of the hammer and abuts between the second boss and the first abutment. The number of anti-drop blocks is 2 to 4, and the hammer can slide axially but cannot rotate circumferentially.

[0016] The drill bit is provided with a third boss; in an initial state, the lower end surface of the hammer abuts against the upper end surface of the third boss.

[0017] Beneficial effects of the present invention:

[0018] The present invention provides a large-impact composite hydraulic hammer that utilizes the dual action mechanisms of axial impact and torsional impact to enhance the rock cutting effect of the drill bit, thereby achieving the purpose of efficient rock breaking and rapid drilling, significantly improving the drilling efficiency of hard rock formations, saving drilling cycles and costs, and ensuring efficient development. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the device of the present invention in the initial state;

[0020] Figure 2 For the present invention Figure 1 Middle AA section view;

[0021] Figure 3 This is a schematic structural diagram of the device of the present invention when the hammer is at the top dead center;

[0022] Figure 4 For the present invention Figure 3 Middle BB cross-section;

[0023] Figure 5 This is a schematic structural diagram of the device of the present invention when the hammer is at the bottom dead center;

[0024] Figure 6 It is a structural schematic diagram of the hammer of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the pendulum of the present invention;

[0026] Figure 8 Schematic diagram of the three-dimensional structure of the hammer of the present invention;

[0027] Figure 9 It is a structural schematic diagram of the upper cam of the present invention;

[0028] Figure 10 For the present invention Figure 1 Schematic diagram of the positional relationship between the upper middle cam, pendulum and hammer;

[0029] Figure 11 For the present invention Figure 2 Schematic diagram of the positional relationship between the upper middle cam, pendulum and hammer.

[0030] In the figure: 1, upper joint; 2, upper shell; 3, diverter; 4, upper cam; 5, pendulum; 6, live valve; 7, lower shell; 8, hammer; 9, sealing piston; 10, anti-drop block; 11, lower joint; 12, drill bit; 13, first cavity; 14, second cavity; 15, third cavity; 16, fourth cavity; 101, first central flow channel; 111, second central flow channel; 121, third central flow channel; 201, fourth central flow channel; 202, first radial slide; 203, pendulum anvil; 204, first stepped hole; 301, first radial flow channel; 302, fourth central flow channel; 303, first An axial flow channel; 304, a first boss; 401, a threaded hole; 402, a fourth groove; 403, an upper cam surface; 501, a second axial flow channel; 502, a first axial through hole; 503, an upper annular cam; 504, a lower annular cam; 601, a second radial flow channel; 602, a fifth central flow channel; 603, a first groove; 604, an anti-drop block; 701, a first stop; 801, a sixth central flow channel; 802, a second groove; 803, a threaded hole; 804, a first radial through groove; 805, a lower cam surface; 806, a first step surface; 807, a third groove; 808, a second step surface. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "end face" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0032] Example 1

[0033] like Figure 1 As shown in FIG7 , this embodiment provides a large-impact composite hydraulic hammer, comprising an upper joint 1, an upper shell 2, a lower shell 7, a lower joint 11 and a drill bit 12; the drill bit 12 is connected to the lower part of the lower joint 11; the lower joint 11 is connected to the lower part of the lower shell 7; the lower shell 7 is connected to the lower part of the upper shell 2; the upper shell 2 is connected to the lower part of the upper joint 1; the upper joint 1 is provided with a first central flow channel 101; the lower joint 11 is provided with a second central flow channel 111; the drill bit 12 is provided with a third central flow channel 121; the first central flow channel 101, the second central flow channel 111 and the third central flow channel 121 are located on the same axis; and the second central flow channel 111 and the third central flow channel 121 are always connected; the upper shell 2 and the lower shell 7 are connected to the upper joint 1 and the lower joint 11 in turn by threads; the drilling fluid enters the interior of the device through the upper joint 1; the drill bit 12 is connected to the lower part of the lower joint 11 by threads, and the upper part of the drill bit 12 is provided with a boss for contacting the hammer 8.

[0034] The lower part of the upper shell 2 is connected to the upper part of the lower shell 7 by a threaded connection. The upper shell 2 and the lower shell 7 are hollow inside to form a cavity, and further include a diverter 3, an upper cam 4, a pendulum 5, a valve 6 and a hammer 8 arranged inside the cavity from top to bottom; the upper shell 2 is provided with a pendulum anvil 203; the pendulum anvil is provided with a third axial flow channel 201, a first radial chute 202 and a first stepped hole 204; the number of the third axial flow channels 201 is 3 to 6, the number of the first radial chute 202 is 3; the pendulum 5 It rests on the first radial groove 202 and can swing circumferentially along the first radial groove 202, with a swing angle of 15°~60°; a sealing device is provided between the first stepped hole 204 and the outer cylindrical surface of the pendulum 5; the hammer 8 is installed in the pendulum anvil 203 and can slide axially along the pendulum anvil 203; a first cavity 13 is formed between the pendulum anvil 203 and the diverter 3; the lower shell 7 is provided with a first abutment 701; it is worth noting that a sealing device is provided between the pendulum anvil 203 and the hammer 8.

[0035] As a preferred implementation scheme, the diverter 3 is provided with a first radial flow channel 301, a fourth central flow channel 302, a first axial flow channel 303 and a first boss 304; the shape of the first radial flow channel 301 is circular, square, rectangular or elliptical, and the number is 3 to 6; the upper end face of the diverter 3 is provided with an annular array of threaded holes, the number is 3 to 6, which are fixed to the lower part of the upper joint 1 by bolts; the number of the first axial flow channels 303 is 3 to 6.

[0036] As a preferred embodiment, the pendulum 5 is provided with a second axial flow channel 501, a first axial through hole 502 and an upper annular cam 503 and a lower annular cam 504 which are symmetrical in the upper and lower parts; the second axial flow channel 501 is intermittently connected to the first axial flow channel 303, and the size and number of the second axial flow channel 501 are consistent with the first axial flow channel 303; the diameter of the first axial through hole 502 is the same as the diameter of the first boss 304, and the pendulum 5 is pressed against the bottom of the diverter 3 through the first axial through hole 502 and the first boss 304; the pendulum 5 can swing in the circumferential direction at a certain angle; a sealing device is provided between the outer cylindrical surface of the pendulum 5 and the first stepped hole 204; a fourth cavity 16 is formed between the pendulum 5 and the hammer 8, and the drilling fluid intermittently enters the fourth cavity 16 through the fourth central flow channel 302, the first axial flow channel 303 and the second axial flow channel 501, pushing the hammer to accelerate downward.

[0037] As a preferred implementation scheme, the active valve 6 is provided with a second radial flow channel 601, a fifth central flow channel 602 and a first groove 603; the second radial flow channel 601 is intermittently connected to the fifth central flow channel 602, and the number of second radial flow channels 601 is 3 to 6; the fifth central flow channel 602 is always connected to the sixth central flow channel 801, the second central flow channel 111 and the third central flow channel 121; when the hammer 8 is in the initial state and starts the upward stage, the second radial flow channel 601 is connected to the fifth central flow channel 602, and the drilling fluid in the fourth cavity 16 can enter the fifth central flow channel 602 through the second radial flow channel 601, and the fourth cavity 16 is in a normal pressure state.

[0038] As a preferred implementation scheme, the upper cam 4 is provided with a circumferential array of threaded holes 401, the number of which is 3, and is fixed above the hammer 8 by bolts; the hammer 8 is provided with a sixth central flow channel 801, a second groove 802, a threaded hole 803, a first radial through groove 804, a lower annular cam 805, a first step surface 806, a third groove 807 and a second step surface 808; the number of the second grooves 802 is 2 to 4, the number and size of the threaded holes 803 are consistent with those of the upper cam threaded holes 401, the size and number of the first radial through grooves 804 are consistent with those of the first radial slide grooves 202, and the lower annular cam 805 is provided with 3 cam teeth; the pendulum 5 is installed between the upper cam 4 and the hammer 8, and can swing circumferentially along the first radial through groove 804, with a swing angle of 15° to 60°; the area of ​​the second step surface 808 is 1.5 to 2 times that of the first step surface 806; when the hammer 8 moves upward, the lower annular cam 805 and the lower annular cam 504 contacts, pushing the pendulum 5 to swing circumferentially, at this time, the drilling fluid enters the fourth cavity 16 through the fourth central flow channel 302, the first axial flow channel 303 and the second axial flow channel 501; when the hammer 8 descends, the upper cam surface 403 of the upper cam 4 contacts the upper annular cam 503, pushing the pendulum 5 to swing circumferentially, at this time, the first axial flow channel 303 and the second axial flow channel 501 are not connected; the drilling fluid cannot enter the fourth cavity 16; in particular, the hammer stroke is 40~100㎜, and the impact frequency of the hammer and the pendulum is consistent; the sixth central flow channel 801 is always connected with the second central flow channel 111 and the third central flow channel 121, and the drilling fluid can flow to the drill bit through the sixth central flow channel 801 and the third central flow channel 111; it is worth noting that the size of the first radial flow channel 301, the first axial flow channel 303, the second axial flow channel 501 and the third axial flow channel 201 and the number of annular arrays can be set according to actual conditions, and this application does not limit it.

[0039] As a preferred embodiment, a sealing piston 9 is provided between the lower part of the hammer 8 and the lower shell 7; the sealing piston 9 is fixed on the first platform 701, and sealing devices are provided between the sealing piston 9, the hammer 8 and the lower shell 7; the sealing piston 9 and the pendulum anvil 203 are divided into upper and lower second cavities 14 and third cavities 15 by the hammer 8, and the second cavity 14 and the third cavity 15 are kept open. The drilling fluid enters the second cavity 14 and the third cavity 15 through the first radial flow channel 301, the first cavity 13 and the third axial flow channel 201, and pushes the hammer 8 upward under the action of the pressure difference.

[0040] Example 2

[0041] like Figure 1 — Figure 7 As shown, this embodiment is developed on the basis of the above implementation. Specifically, this embodiment provides a specific working principle of a large impact composite hydraulic hammer, as follows:

[0042] In this embodiment, in the initial state, the lower end of the hammer 8 contacts the second boss 122 at the upper end of the drill bit 12, the upper cam surface 403 of the upper cam 4 contacts the upper annular cam 503 of the pendulum 5, the first axial flow channel 303 is not connected to the second axial flow channel 501, and the drilling fluid cannot enter the fourth cavity 16; the active valve 6 is at the lower end under the action of gravity. At this time, the fourth cavity 16 is connected to the fifth central flow channel 602 through the second radial flow channel 601 and is in a normal pressure state.

[0043] (1) The hammer 8 accelerates upward: the drilling fluid enters the device from the upper joint 1, passes through the first radial flow channel 301 and the third axial flow channel 201, and enters the second cavity 14 and the third cavity 15. Since the area of ​​the second step surface 808 is larger than the first step surface 806, the upward force acting on the hammer 8 is greater than the downward force. Under the action of the pressure difference, the hammer 8 accelerates upward.

[0044] (2) The deceleration and upward movement of the hammer 8: After the hammer 8 moves upward for a certain distance under the action of the pressure difference, the lower annular cam 805 of the hammer 8 contacts the lower annular cam 504 of the pendulum 5, pushing the pendulum 5 to swing circumferentially. At the same time, the valve 6 moves upward under the push of the hammer 8. After the pendulum 5 swings circumferentially for a certain angle, the second axial flow channel 501 is connected to the first axial flow channel 303. At this time, the second radial flow channel 601 is disconnected from the fifth central flow channel 602. The drilling fluid enters the fourth cavity 16 from the fourth central flow channel 302, the first axial flow channel 303 and the second axial flow channel 501. The fourth cavity 16 is in a high-pressure state, causing the hammer 8 to decelerate to zero.

[0045] (3) The stage of accelerating the downward movement of the hammer 8: part of the drilling fluid enters the second cavity 14 and the third cavity 15 through the first radial flow channel 301, the first cavity 13, and the third axial flow channel 201, and part of the drilling fluid enters the fourth cavity 16 through the fourth central flow channel 302, the first axial flow channel 303, and the second axial flow channel 501. At this time, the valve 6 is at the top dead center, the second radial flow channel 601 is not connected to the fifth central flow channel 602, and the fourth cavity 16 is in a high-pressure state. Under the action of the pressure difference, the hammer 8 is pushed to accelerate downward.

[0046] (4) The hammer 8 decelerates and strikes the drill bit: After the hammer 8 descends a certain distance, the upper cam surface 403 of the upper cam 4 contacts the upper annular cam 503 of the pendulum 5, pushing the hammer 5 to rotate circumferentially by a certain angle. The first axial flow channel 303 and the second axial flow channel 501 are disconnected. At the same time, the valve 6 descends a certain distance under the action of the hammer 8. At this time, the second axial flow channel 601 is connected to the fifth central flow channel 602. The fourth cavity 16 is in a normal pressure state. Under the pressure difference formed between the second cavity 14 and the third cavity 15, the hammer decelerates appropriately and strikes the drill bit.

[0047] 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 to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A large impact composite hydraulic hammer, comprising an upper joint (1), an upper shell (2), a lower shell (7), a lower joint (11) and a drill bit (12); the upper joint (1) is threadedly connected to the upper portion of the upper shell (2), and a first central flow channel (101) is provided in the upper joint (1); the lower joint (11) is threadedly connected to the lower portion of the lower shell (7), and a second central flow channel (111) is provided in the lower joint (11); the drill bit (12) is threadedly connected to the lower portion of the lower joint (11), and a third central flow channel (121) is provided in the drill bit (12); the lower portion of the upper shell (2) is threadedly connected to the upper portion of the lower shell (7), and the upper shell (2) and the lower shell (7) are hollow inside to form a cavity; the characteristics are as follows: The invention also includes a flow divider (3), an upper cam (4), a pendulum (5), a live valve (6) and a hammer (8) arranged in the cavity from top to bottom; the flow divider (3) is provided with a fourth central flow channel (302), a first radial flow channel (301) and a first axial flow channel (303); the upper end surface of the flow divider (3) is provided with an annular array of threaded holes, and the lower end surface is provided with a first boss (304); the upper cam (4) is provided with a threaded hole (401), a fourth groove (402) and an upper cam surface (403); the pendulum (5) is provided with a second axial flow channel (501), a first axial through hole (502) and an upper annular cam (503) and a lower annular cam (504) that are symmetrical in the upper and lower directions. (504); the second axial flow channel (501) is intermittently connected to the first axial flow channel (303); the active valve (6) is provided with a second radial flow channel (601), a fifth central flow channel (602) and a first groove (603); the punch (8) is provided with a sixth central flow channel (801), a second groove (802), a threaded hole (803), a first radial through groove (804), a lower cam surface (805), a first step surface (806), a third groove (807) and a second step surface (808); the fifth central flow channel (602), the sixth central flow channel (801), the second central flow channel (111) and the third central flow channel (121) are always connected; The upper shell (2) is provided with a pendulum anvil (203); the lower shell (7) is provided with a first stop (701); a sealing piston (9) is provided between the lower part of the hammer (8) and the first stop (701); the sealing piston (9) is fixed on the first stop (701), and a sealing device is provided between the lower shell (7) and the hammer (8); a first cavity (13) is formed between the pendulum anvil (203) and the diverter (3); the sealing piston (9) and the pendulum anvil (203) are divided into a second cavity (14) and a third cavity (15) by the piston (8), and the first cavity (13) is kept in constant communication with the second cavity (14) and the third cavity (15).

2. A large impact composite hydraulic hammer according to claim 1, characterized in that A pendulum anvil (203) is provided in the upper shell (2); a third axial flow channel (201), a first radial slot (202) and a first stepped hole (204) are provided on the pendulum anvil (203); the number of the first radial slots (202) is 3; the number of the third axial flow channels (201) is 3 to 6; the pendulum (5) abuts against the first radial slot (202) and can swing circumferentially in the first radial slot (201), with a swing angle of 15° to 60°; a sealing device is provided between the pendulum anvil (203) and the punch (8); a sealing device is provided between the first stepped hole (204) and the outer cylindrical surface of the pendulum (5); the drilling fluid in the third cavity (13) enters the second cavity (14) and the third cavity (15) through the third axial flow channel (201).

3. A large impact composite hydraulic hammer according to claim 1, characterized in that The punch (8) is installed inside the lower housing (7) and can move axially along the lower housing (7); the lower housing (7) is provided with a first stop (701); the sealing piston (9) is axially fixed on the first stop (701), and sealing devices are provided between the sealing piston (9), the lower housing (7) and the punch (8).

4. A large impact composite hydraulic hammer according to claim 1, characterized in that The flow divider (3) is provided with a first radial flow channel (301), a first axial flow channel (303), and a first boss (304); the first radial flow channels (301) are circular, square, rectangular, or elliptical in shape, and the number of the first radial flow channels (301) is 3 to 6; the number of the first axial flow channels (303) is 3 to 6; the upper portion of the flow divider (3) is provided with threaded holes, the number of the threaded holes being 3 to 6, which are fixed to the lower portion of the upper joint (1) by bolts; part of the drilling fluid enters the first cavity (13) through the first radial flow channel (301).

5. The large impact composite hydraulic hammer according to claim 1, characterized in that The pendulum (5) is provided with a second axial flow channel (501), a first axial through hole (502), and an upper annular cam (503) and a lower annular cam (504) that are symmetrical in the upper and lower directions; the second axial flow channel (501) is intermittently connected to the first axial flow channel (303), and the shape, size and number of the second axial flow channel (501) are consistent with those of the first axial flow channel (303); the first axial through hole (502) of the pendulum (5) is matched with the first boss (304), abuts against the lower part of the diverter (3), and can rotate circumferentially along the first boss (304), with a rotation angle of 15° to 60°; the upper annular cam (503) and the lower annular cam (504) are both provided with three cam teeth.

6. The large impact composite hydraulic hammer according to claim 1, characterized in that The active valve (6) is provided with a second radial flow channel (601), a fifth central flow channel (602) and a first groove (603); the anti-drop block (604) is installed in the first groove (603), and the active valve (6) is installed in the third groove (807) of the hammer (8) and can move axially along the third groove (807), and the stroke of the active valve (6) is 30~100mm; the number of the second radial flow channels (601) is 3~6; the second radial flow channels (601) are intermittently connected to the fifth central flow channel (602).

7. The large impact composite hydraulic hammer according to claim 2, characterized in that The hammer (8) is provided with a sixth central flow channel (801), a second groove (802), a threaded hole (803), a first radial through groove (804), a lower cam surface (805), a first step surface (806), a third groove (807) and a second step surface (808); the number of the second grooves (802) is 2 to 4; the number of the threaded holes (803) is 3; the number and size of the first radial through grooves (804) are consistent with those of the first radial slide groove (202); the lower cam surface (805) is provided with 3 cam teeth; the ... and a second step surface (808); the number of the second grooves (802) is 2 to 4; the number of the threaded holes (803) is 3; the number of the first radial through grooves (804) is consistent with that of the first radial slide groove (202); the lower cam surface (805) is provided with 3 cam teeth; the sixth central flow channel (801), a second groove (802), a first step surface (806), a third groove (807) and a second step surface (808) are provided; the number of the second grooves The central flow channel (801) is always connected to the second central flow channel (111) and the third central flow channel (121); the upper cam (4) is fixed to the upper part of the hammer (8) by bolts, and the size and number of the threaded holes of the upper cam are consistent with those of the threaded holes (803); the pendulum (5) is installed in the first radial through groove (804) and can swing along the circumference of the first radial through groove (804), and the swing angle is consistent with the first radial slide groove (202); the area of ​​the second step surface (808) is 1.5 to 2 times the area of ​​the first step surface (807); and the stroke of the hammer is 40 to 100 mm.

8. A large impact composite hydraulic hammer according to claim 5 or claim 7, characterized in that The impact frequencies of the hammer (8) and the pendulum (5) are kept consistent.

9. The large impact composite hydraulic hammer according to claim 1, characterized in that The lower joint (11) is provided with a second boss (112); the anti-drop block (10) is installed in the second groove (802) of the hammer (8) and abuts against the second boss (112); the hammer (8) can slide axially along the anti-drop block (10) but cannot rotate circumferentially; the number of the anti-drop blocks is 2 to 4.

Images