Hydraulic axial vibration impact rock breaker

Abstract

The present invention provides a hydraulic axial vibration impact rock breaker, comprising: an outer shell having a central channel; a hammer outer body, which is inserted into the central channel, the hammer outer body having an impact cavity, the lower end of the hammer outer body being connected to the lower end of the outer shell; a shunt pipe, which is located in the central channel, an outer shunt channel is formed between the upper end of the shunt pipe and the outer shell, the lower end of the shunt pipe is inserted into the impact cavity, the shunt pipe has a liquid inlet channel, and the shunt pipe is respectively provided with a shunt liquid inlet hole, a starting liquid inlet channel and a liquid outlet hole connected to the liquid inlet channel from top to bottom; an impact mechanism, which is sleeved on the shunt pipe and arranged opposite to the starting liquid inlet channel, the impact mechanism has a starting pipe and a hydraulic hammer pipe, the starting pipe can be axially movably sleeved on the shunt pipe, the hydraulic hammer pipe can be axially movably sleeved on the starting pipe, and the hydraulic hammer pipe can impact the hammer outer body under the drive of the starting pipe. The present invention can apply axial vibration force to a rotary drilling drill bit to improve the rock breaking efficiency and drilling speed of the drill bit.

Description

Technical Field

[0001] The invention relates to the field of oil drilling, in particular to a hydraulic axial vibration impact rock breaker. Background Art

[0002] As the demand for oil and gas energy and mineral resources gradually expands, oil and gas drilling and geological core drilling are increasingly moving towards the interior of the formation. In terms of oil and gas extraction, one of my country's future development priorities is deep formations below 4,500 meters. In the drilling of deep wells and ultra-deep wells, there are problems such as low drilling efficiency and well inclination, which greatly increases the drilling cost. Therefore, among various drilling technologies, efficient drilling and rock breaking technology has highlighted its importance.

[0003] At present, various types of impactors are the main downhole power tools to improve the mechanical drilling speed of deep wells. However, conventional impactors generally have disadvantages such as many moving parts and many components. This makes the impactor have many vulnerable and weak parts, greatly reducing the life of conventional hydraulic impactors and resulting in low drilling efficiency. At the same time, its spring and other buffer energy storage devices also affect the effectiveness of the impactor and reduce the service life of the impactor. These problems seriously restrict the promotion and use of hydraulic impactors on site. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic axial vibration impact rock breaker to solve the problem that the traditional impactor has a short service life and low efficiency, which leads to low drilling efficiency of the drill bit.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a hydraulic axial vibration impact rock breaker, comprising:

[0007] an outer shell having a central passage;

[0008] A hammer outer body is inserted into the central channel, the hammer outer body has an impact cavity, and the lower end of the hammer outer body is connected to the lower end of the outer shell;

[0009] A shunt pipe is located in the central channel, an outer shunt channel is formed between the upper end of the shunt pipe and the outer shell, the lower end of the shunt pipe is arranged in the impact chamber, the shunt pipe has a liquid inlet channel, and the shunt pipe is respectively provided with a shunt liquid inlet hole, a start-up liquid inlet channel and a liquid outlet hole connected to the liquid inlet channel from top to bottom, the shunt liquid inlet hole is connected to the outer shunt channel, and the start-up liquid inlet channel and the liquid outlet hole are respectively connected to the impact chamber;

[0010] An impact mechanism is sleeved on the shunt pipe and arranged opposite to the starting liquid inlet channel. The impact mechanism comprises a starting pipe and a hydraulic hammer pipe. The starting pipe is sleeved on the shunt pipe axially movably, and the hydraulic hammer pipe is sleeved on the starting pipe axially movably. The hydraulic hammer pipe can impact the hammer outer body under the drive of the starting pipe.

[0011] Furthermore, the starter tube has hydraulic grooves and starter flow channels staggered in the circumferential direction, the hydraulic grooves are opened on the outer wall of the starter tube, and the starter flow channel includes an upper starter hole and a lower starter hole;

[0012] The hydraulic hammer tube has an outer slider and an inner slider arranged alternately in the circumferential direction, the outer slider is arranged on the outer wall of the hydraulic hammer tube, the inner slider is arranged on the inner wall of the hydraulic hammer tube and extends into the hydraulic groove, and the hydraulic hammer tube is also provided with a first upper hydraulic hole and a first lower hydraulic hole located on both sides of the outer slider, and a second upper hydraulic hole and a second lower hydraulic hole located on both sides of the inner slider;

[0013] Wherein, the first upper hydraulic hole can be connected to the starting liquid inlet channel of the diverter tube through the upper starting hole, and the first lower hydraulic hole can be connected to the starting liquid inlet channel of the diverter tube through the lower starting hole.

[0014] Furthermore, an axial leakage groove is formed on the outer wall of the starting tube, and the axial leakage groove is communicated with the impact chamber.

[0015] Furthermore, an external flow channel is formed between the hammer outer body and the outer shell, the external flow channel is connected with the external diversion channel, and a guide channel is opened on the hammer outer body, and the external flow channel is connected with the impact chamber through the guide channel.

[0016] Furthermore, the diversion channel includes an upper diversion hole located at the upper part of the hammer outer body, a lower diversion hole located at the lower part of the hammer outer body, and an intermediate diversion hole located between the upper diversion hole and the lower diversion hole; wherein the lower diversion hole is connected to the liquid outlet hole of the diversion pipe.

[0017] Furthermore, an impact groove is formed on the inner wall of the hammer outer body, the impact groove and the guide channel are staggered along the circumferential direction of the hammer outer body, and the outer sliding block can move axially in the impact groove.

[0018] Furthermore, when the outer sliding block abuts against the bottom wall of the impact groove, the outer flow passage is connected to the hydraulic groove through the middle guide hole and the second lower hydraulic hole, and the outer flow passage is connected to the inner channel of the hydraulic hammer tube through the lower guide hole.

[0019] Furthermore, when the outer sliding block is in contact with the top wall of the impact groove, the outer flow passage is communicated with the hydraulic groove through the upper flow guide hole and the second upper hydraulic hole.

[0020] Furthermore, at least one drainage groove is formed on the inner wall of the hammer outer body, and the drainage groove is extended along the axial direction of the hammer outer body. The upper end of the drainage groove is connected to the impact groove, and the lower end of the drainage groove is connected to the impact cavity.

[0021] Furthermore, the inner wall of the hammer outer body is provided with two radially oppositely arranged impact grooves, and the outer wall of the hydraulic hammer tube is provided with two radially oppositely arranged outer sliding blocks, and the two outer sliding blocks are axially movable in the corresponding impact grooves.

[0022] Furthermore, the outer wall of the starting tube has two radially oppositely arranged hydraulic grooves, and the inner wall of the hydraulic hammer tube has two radially oppositely arranged inner sliding blocks, and the two inner sliding blocks can be axially moved in the corresponding hydraulic grooves respectively.

[0023] Furthermore, a first reduced diameter flow channel is provided in the diverter pipe, and the first reduced diameter flow channel is located between the starting liquid inlet channel and the liquid outlet hole.

[0024] Furthermore, the diverter pipe has a second reduced diameter flow channel, and the second reduced diameter flow channel is located between the diverter liquid inlet hole and the start-up liquid inlet channel.

[0025] Furthermore, the hammer outer body has a hammer pressure cover and a hammer outer shell that are snap-fitted together, the impact cavity is formed between the hammer pressure cover and the hammer outer shell, a plurality of plug-in protrusions are arranged on the outer wall of the lower end of the hammer outer shell at intervals along its circumferential direction, and a plurality of plug-in grooves are arranged at intervals at the lower end of the outer shell along its circumferential direction, and a plurality of the plug-in protrusions can be inserted into the plurality of the plug-in grooves.

[0026] The characteristics and advantages of the hydraulic axial vibration impact rock breaker of the present invention are: the hydraulic hammer tube of the impact mechanism can impact the hammer outer body under the drive of the starting tube to apply axial vibration force to the rotary drilling drill bit, thereby improving the rock breaking efficiency and drilling speed of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1The structure of the hydraulic axial vibration impact rock breaker of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 2 The structure of the hydraulic axial vibration impact rock breaker of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 3 It is a schematic structural diagram of a hammer outer body and a hydraulic hammer tube in a hydraulic axial vibration impact rock breaker of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a shunt pipe in a hydraulic axial vibration impact rock breaker of the present invention;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the hydraulic hammer tube in the hydraulic axial vibration impact rock breaker of the present invention;

[0033] Figure 6 It is a schematic cross-sectional structural diagram of a hydraulic hammer tube in a hydraulic axial vibration impact rock breaker of the present invention;

[0034] Figure 7 It is a cross-sectional structural schematic diagram of another perspective of the hydraulic hammer tube in the hydraulic axial vibration impact rock breaker of the present invention;

[0035] Figure 8 It is a schematic diagram of the three-dimensional structure of the starting tube in the hydraulic axial vibration impact rock breaker of the present invention;

[0036] Fig. 9 It is a schematic cross-sectional view of the starter tube in the hydraulic axial vibration impact rock breaker of the present invention;

[0037] Fig.10 A top view of a starting tube in a hydraulic axial vibration impact rock breaker of the present invention;

[0038] Fig.11 It is a schematic diagram of the three-dimensional structure of the hammer housing of the hydraulic axial vibration impact rock breaker of the present invention;

[0039] Fig.12 It is a schematic cross-sectional structural diagram of a hammer housing of a hydraulic axial vibration impact rock breaker of the present invention;

[0040] Fig.13 It is a side view of the hammer cover in the hydraulic axial vibration impact rock breaker of the present invention;

[0041] Fig.14 It is a schematic cross-sectional structural diagram of a hammer cover in a hydraulic axial vibration impact rock breaker of the present invention;

[0042] Fig.15 It is a schematic diagram of the cross-sectional structure of the outer shell of the hydraulic axial vibration impact rock breaker of the present invention.

[0043] Description of Figure Numbers:

[0044] 1. Outer shell; 11. Center channel; 12. Plug slot;

[0045] 2. Hammer outer body; 21. Impact cavity; 22. External flow passage; 23. Diversion channel; 231. Upper diversion hole; 232. Lower diversion hole; 233. Middle diversion hole; 24. Impact groove; 25. Discharge groove; 26. Hammer pressure cover; 261. Semicircular hole; 262. Water wedge chamfer; 263. Discharge chamfer; 264. Cylindrical hole; 265. End plate; 2651. Perforation; 266. Flange; 27. Hammer outer shell; 271. Insertion protrusion; 272. Cylindrical threaded hole; 273. Semicircular groove; 28. Annular discharge flow channel;

[0046] 3. shunt pipe; 31. external shunt channel; 32. liquid inlet channel; 33. shunt liquid inlet hole; 34. start liquid inlet channel; 35. liquid outlet hole; 36. first reduced diameter flow channel; 37. second reduced neck flow channel;

[0047] 4. Impact mechanism; 41. Starting tube; 411. Hydraulic groove; 412. Starting flow channel; 4121. Upper starting hole; 4122. Lower starting hole; 413. Axial leakage groove; 42. Hydraulic hammer tube; 421. Outer slider; 422. Inner slider; 423. First upper hydraulic hole; 424. First lower hydraulic hole; 425. Second upper hydraulic hole; 426. Second lower hydraulic hole. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figures 1 to 15As shown, the present invention provides a hydraulic axial vibration impact rock breaker, comprising an outer shell 1, a hammer outer body 2, a shunt pipe 3 and an impact mechanism 4, wherein the outer shell 1 has a central channel 11; the hammer outer body 2 is arranged in the central channel 11, the hammer outer body 2 has an impact cavity 21, and the lower end of the hammer outer body 2 is connected to the lower end of the outer shell 1; the shunt pipe 3 is located in the central channel 11, an outer shunt channel 31 is formed between the upper end of the shunt pipe 3 and the outer shell 1, the lower end of the shunt pipe 3 is arranged in the impact cavity 21, the shunt pipe 3 has a liquid inlet channel 32, and the shunt pipe 3 is respectively provided with a liquid inlet channel 32 from top to bottom. The channel 32 is connected to the shunt liquid inlet hole 33, the starting liquid inlet channel 34 and the liquid outlet hole 35, the shunt liquid inlet hole 33 is connected to the external shunt channel 31, the starting liquid inlet channel 34 and the liquid outlet hole 35 are respectively connected to the impact chamber 21; the impact mechanism 4 is sleeved on the shunt pipe 3 and arranged opposite to the starting liquid inlet channel 34, the impact mechanism 4 has a starting pipe 41 and a hydraulic hammer pipe 42, the starting pipe 41 can be axially movably sleeved on the shunt pipe 3, the hydraulic hammer pipe 42 can be axially movably sleeved on the starting pipe 41, and the hydraulic hammer pipe 42 can impact the hammer outer body 2 under the drive of the starting pipe 41.

[0050] The hydraulic axial vibration impact rock breaker of the present invention has a hydraulic hammer tube 42 of an impact mechanism 4 that can impact the hammer outer body 2 under the drive of a starting tube 41, so as to apply an axial vibration force to a rotary drilling drill bit, thereby improving the rock breaking efficiency and drilling speed of the drill bit. At the same time, the hydraulic axial vibration impact rock breaker of the present invention has the advantages of less intermediate structures, less prone to damage to components, low energy consumption and high impact force. It can utilize the liquid pressure of the drilling fluid and does not require additional energy supplement, so that the drilling fluid is more fully utilized and the pressure loss of the drilling fluid is greatly reduced. The hydraulic axial vibration impact rock breaker of the present invention has the characteristics of simple structure, easy implementation and low cost, so that the present invention is convenient for promotion and use in oil fields.

[0051] Specifically, Fig.15 As shown, in the present invention, the outer shell 1 is generally cylindrical, and a central channel 11 is formed in the outer shell 1, which runs through from top to bottom. The lower end of the outer shell 1 is provided with a plurality of insertion grooves 12 at intervals along its circumferential direction, and the inner wall of the upper end of the outer shell 1 is threaded for connecting a drill string or a drill collar.

[0052] like Figure 3 , Fig.11 , Fig.12 , Fig.13 as well as Fig.14 As shown, in the present invention, the hammer outer body 2 has an impact cavity 21, and the upper end of the hammer outer body 2 is inserted into the central channel 11 of the outer shell 1 from the lower end of the outer shell 1. Figure 1As shown, an outer flow passage 22 is formed between the hammer outer body 2 and the outer shell 1, and the outer flow passage 22 is connected to the outer flow diversion passage 31. An impact groove 24 is formed on the inner wall of the hammer outer body 2. In this embodiment, the inner wall of the hammer outer body 2 has two radially symmetrical impact grooves 24. Of course, in other embodiments, the impact grooves 24 can also be three, four or more in number and are spaced apart along the circumferential direction of the hammer outer body 2, which is not limited here.

[0053] Furthermore, a guide channel 23 is provided on the hammer outer body 2, and the external flow channel 22 is connected with the impact chamber 21 through the guide channel 23. In this embodiment, two radially symmetrical guide channels 23 are provided on the outer wall of the hammer outer body 2, and the two guide channels 23 and the two impact grooves 24 are staggered along the circumferential direction of the hammer outer body 2.

[0054] In this embodiment, if Fig.11 As shown, the guide channel 23 includes an upper guide hole 231 located at the upper part of the hammer outer body 2, a lower guide hole 232 located at the lower part of the hammer outer body 2, and an intermediate guide hole 233 located between the upper guide hole 231 and the lower guide hole 232; wherein the lower guide hole 232 is connected to the liquid outlet hole 35 of the shunt pipe 3.

[0055] Specifically, Figure 1 , Figure 3 , Fig.13 as well as Fig.14 As shown, the hammer outer body 2 has a hammer cover 26 and a hammer housing 27 which are connected by snapping; wherein the hammer cover 26 is generally cylindrical, and an end plate 265 is formed at the upper end of the hammer cover 26, and a through hole 2651 is formed on the end plate 265, and the shunt pipe 3 passes through the through hole 2651, and a flange 266 is formed at the lower end of the hammer cover 26, and the hammer cover 26 is connected to the hammer housing 27 through the flange 266, and the upper end of the hammer cover 26 abuts against the shunt pipe 3, and a water wedge chamfer 262 is formed at the upper end of the hammer cover 26, so that the drilling fluid can firmly press the hammer cover 26 on the hammer housing 27 through the water wedge action. Four cylindrical holes 264 are spaced apart along the circumferential direction of the flange 266 of the hammer cover 26, and two radially symmetrically arranged semicircular holes 261 are opened on the flange 266 of the hammer cover 26.

[0056] like Figure 1 , Figure 2 , Fig.11 and 12As shown, the hammer housing 27 is generally cylindrical, and four cylindrical threaded holes 272 are arranged at intervals along the circumferential direction of the upper end of the hammer housing 27. The four cylindrical holes 264 on the hammer cover 26 match the four cylindrical threaded holes 272. Bolts pass through the cylindrical holes 264 and are threadedly connected in the cylindrical threaded holes 272 to fix the hammer cover 26 on the hammer housing 27, so as to reduce the shaking of components inside the impactor, thereby reducing the wear of components and increasing the service life of the hydraulic axial vibration impact rock breaker of the present invention.

[0057] Furthermore, two radially symmetrically arranged semicircular grooves 273 are formed on the outer wall of the hammer housing 27, and two radially symmetrically arranged outer flow channels 22 are formed between the two semicircular grooves 273 and the outer housing 1. The two outer flow channels 22 are connected to the outer diversion channel 31 through two semicircular holes 261 respectively.

[0058] An impact cavity 21 is formed between the hammer pressure cover 26 and the hammer housing 27. The two guide channels 23 and the two impact grooves 24 are all located on the hammer housing 27 and are staggered along the circumferential direction of the hammer housing 27. A plurality of plug-in protrusions 271 are provided on the outer wall of the lower end of the hammer housing 27 at intervals along its circumferential direction. The plurality of plug-in protrusions 271 can be inserted into the plurality of plug-in grooves 12 of the outer housing 1. The plurality of plug-in protrusions 271 are engaged with the plurality of plug-in grooves 12 to transmit the torque of the upper drill string.

[0059] Furthermore, at least one drainage groove 25 is formed on the inner wall of the hammer housing 27 . The drainage groove 25 is extended along the axial direction of the hammer outer body 2 . The upper end of the drainage groove 25 is connected to the impact groove 24 , and the lower end thereof is connected to the impact cavity 21 . In a specific embodiment, the inner wall of the hammer housing 27 is provided with four drainage grooves 25 spaced apart along its circumferential direction, and the drainage grooves 25 are semicircular. In this embodiment, a drainage chamfer 263 is provided on the inner wall of the hammer pressure cover 26, so that the drilling fluid forms a water wedge through the drainage chamfer 263 to push the hydraulic hammer tube 42 to move, and an annular drainage flow channel 28 is formed between the drainage chamfer 263 and the hydraulic hammer tube 42. The impact groove 24 is connected to the upper end of the drainage groove 25 through the annular drainage flow channel 28, and the lower end of the drainage groove 25 is connected to the impact chamber 21, so that the drilling fluid in the drainage groove 25 can flow to the drill bit through the annular drainage flow channel 28, the drainage groove 25, the inner channel of the hammer housing 27 and the liquid outlet hole 35 of the diverter pipe 3 in sequence.

[0060] like Figure 1 , Figure 2 as well as Figure 4As shown, in the present invention, the shunt tube 3 is generally cylindrical, and has a liquid inlet channel 32 that passes through from top to bottom. The upper end of the shunt tube 3 abuts against the inner wall of the outer shell 1, and the lower end of the shunt tube 3 is connected to the hammer shell 27 by a thread. The shunt tube 3 is provided with a shunt liquid inlet hole 33 connected to the liquid inlet channel 32, a starting liquid inlet channel 34 and a liquid outlet hole 35 from top to bottom. In this embodiment, the upper portion of the shunt tube 3 is provided with a plurality of shunt liquid inlet holes 33 spaced apart along its circumferential direction, the liquid inlet channel 32 of the shunt tube 3 is connected with the external shunt channel 31 through the plurality of shunt liquid inlet holes 33, the lower portion of the shunt tube 3 is provided with a plurality of liquid outlet holes 35 spaced apart along its circumferential direction, the impact chamber 21 is connected with the liquid inlet channel 32 of the shunt tube 3 through the plurality of liquid outlet holes 35. In a specific embodiment, the number of the shunt liquid inlet holes 33 is six, and the number of the liquid outlet holes 35 is eight. Of course, in other embodiments, the number of the shunt liquid inlet holes 33 and the liquid outlet holes 35 may also be ten, twelve or more, which is not limited here.

[0061] In this embodiment, the starting liquid inlet channel 34 is a plurality of rectangular holes spaced apart along the circumferential direction of the diverter tube 3. The lengths of the rectangular holes are arranged parallel to the axial direction of the diverter tube 3. The drilling fluid can be diverted into the impact groove 24 through the rectangular holes to drive the hydraulic hammer tube 42 to move. In this embodiment, a second necked flow channel 37 is provided in the shunt pipe 3, and the second necked flow channel 37 is located between the shunt liquid inlet hole 33 and the start liquid inlet channel 34. The second necked flow channel 37 is generally conical, and has a large-diameter end and a small-diameter end located below the large-diameter end. The large-diameter end of the second necked flow channel 37 is arranged toward the shunt liquid inlet hole 33. When the drilling fluid flows from the large-diameter end to the small-diameter end of the second necked flow channel 37, the diameter of the second necked flow channel 37 becomes smaller so that the second necked flow channel 37 can slow down the speed of the drilling fluid flowing downward. At this time, the pressure of the drilling fluid in the second necked flow channel 37 rises, so that the drilling fluid in the second necked flow channel 37 can smoothly pass through the multiple shunt liquid inlet holes 33 into the external shunt channel 31.

[0062] In this embodiment, a first reduced diameter flow channel 36 is provided in the shunt pipe 3. The first reduced diameter flow channel 36 is located between the start-up liquid inlet channel 34 and the liquid outlet holes 35. The first reduced diameter flow channel 36 is generally conical and has the same function as a nozzle. The first reduced diameter flow channel 36 has a large diameter end and a small diameter end located below the large diameter end. The large diameter end is located below the start-up liquid inlet channel 34, and the small diameter end is located above the eight liquid outlet holes 35. When the drilling fluid flows from the large diameter end to the small diameter end of the first reduced diameter flow channel 36, the drilling fluid ejected from the small diameter end is accelerated to flow downward due to the reduction in the diameter of the first reduced diameter flow channel 36, so as to reduce the pressure at the large diameter end of the first reduced diameter flow channel 36, so that the liquid flow in the hammer housing 27 continues to flow downward through the eight liquid outlet holes 35 at the lower end of the shunt pipe 3 along with the drilling fluid ejected from the small diameter end of the first reduced diameter flow channel 36. The large-diameter end of the first reduced-diameter flow channel 36 is arranged toward the plurality of rectangular holes. The first reduced-diameter flow channel 36 can increase the pressure of the drilling fluid in the liquid inlet channel 32 so that the drilling fluid enters the impact groove 24 through the plurality of rectangular holes.

[0063] like Figures 8 to 10 As shown, in the present invention, the starter tube 41 is generally cylindrical, and has hydraulic grooves 411 and starter channels 412 arranged alternately in the circumferential direction. The hydraulic grooves 411 are provided on the outer wall of the starter tube 41, and the starter channels 412 include an upper starter hole 4121 and a lower starter hole 4122. The outer wall of the starter tube 41 is formed with an axial leakage groove 413, and the axial leakage groove 413 is connected to the impact chamber 21. In this embodiment, the starter tube 41 has two radially symmetrically arranged hydraulic grooves 411, and the cross-sections of the two hydraulic grooves 411 are generally fan-shaped. Of course, in other embodiments, the hydraulic grooves 411 can also be three, four or more arranged at intervals in the circumferential direction of the starter tube 41, and there is no limitation here. In this embodiment, the starter tube 41 has two radially symmetrically arranged starter channels 412, and the two starter channels 412 are respectively arranged alternately with the two hydraulic grooves 411 in the circumferential direction of the starter tube 41.

[0064] like Figures 5 to 7 As shown, in the present invention, the hydraulic hammer tube 42 is generally cylindrical, and has outer sliders 421 and inner sliders 422 arranged alternately along the circumferential direction. The outer sliders 421 are arranged on the outer wall of the hydraulic hammer tube 42, and the inner sliders 422 are arranged on the inner wall of the hydraulic hammer tube 42 and extend into the hydraulic groove 411. In this embodiment, the outer wall of the hydraulic hammer tube 42 has two radially symmetrically arranged outer sliders 421, and the cross-sections of the two outer sliders 421 are generally fan-shaped. The two outer sliders 421 are respectively axially movable in the corresponding two impact grooves 24 on the hammer housing 27. In this embodiment, the inner wall of the hydraulic hammer tube 42 has two radially symmetrically arranged inner sliders 422, and the two inner sliders 422 are respectively axially movable in the corresponding two hydraulic grooves 411 on the starting tube 41.

[0065] In this embodiment, the hydraulic hammer tube 42 is further provided with a first upper hydraulic hole 423 and a first lower hydraulic hole 424 located on both sides of the outer slider 421, and a second upper hydraulic hole 425 and a second lower hydraulic hole 426 located on both sides of the inner slider 422; wherein the first upper hydraulic hole 423 can be connected to the start-up liquid inlet channel 34 of the shunt tube 3 through the upper start-up hole 4121, and the first lower hydraulic hole 424 can be connected to the start-up liquid inlet channel 34 of the shunt tube 3 through the lower start-up hole 4122. When the outer slider 421 abuts against the bottom wall of the impact groove 24, the outer flow passage 22 is connected to the hydraulic groove 411 through the middle guide hole 233 and the second lower hydraulic hole 426, and the outer flow passage 22 is connected to the inner channel of the hydraulic hammer tube 42 through the lower guide hole 232, so that the drilling fluid pushes the hydraulic hammer tube 42 and the start-up tube 41 upward. When the outer slider 421 abuts against the top wall of the impact groove 24 , that is, when the outer slider 421 abuts against the hammer cover 26 , the outer flow channel 22 is connected to the hydraulic groove 411 through the upper guide hole 231 and the second upper hydraulic hole 425 .

[0066] In the present invention, the lower end of the hammer housing 27 is fixed with the shunt pipe 3 through a thread, the inner slider 422 of the hydraulic hammer tube 42 cooperates with the hydraulic groove 411 of the starting tube 41 and is placed inside the hammer housing 27, the lower end of the hammer pressure cover 26 is fixed to the upper end of the hammer housing 27 by bolts, the upper end of the hammer pressure cover 26 is sealed and an impact cavity 21 is formed between the hammer housing 27, and the outer shell 1 is the outermost element of the hydraulic axial vibration impact rock breaker of the present invention, which is a cylindrical hollow body as a whole, the upper part of the outer shell 1 is connected to the upper drill string, and the lower part is connected to the hammer housing 27, thereby forming the hydraulic axial vibration impact rock breaker of the present invention.

[0067] like Figures 1 to 3 As shown; the working process of the hydraulic axial vibration impact rock breaker of the present invention is as follows:

[0068] First, the drill collar is connected and installed to the upper end of the outer shell 1, the drill bit is installed to the lower end of the hammer shell 27, and the hydraulic axial vibration impact rock breaker of the present invention is lowered into the well, and the drilling fluid is circulated at this time, so that the hydraulic axial vibration impact rock breaker of the present invention starts to work under the action of the drilling fluid;

[0069] After the drilling fluid enters the central channel 11 of the outer shell 1, it is diverted through the diverter pipe 3. A part of the drilling fluid flows into the outer diverter channel 31 through a plurality of diverter inlet holes 33. The drilling fluid in the outer diverter channel 31 continues to flow downward and flows into the outer flow channel 22 through the semicircular hole 261 on the hammer cover 26. At the same time, the drilling fluid continues to flow to the upper guide hole 231, the middle guide hole 233 and the lower guide hole 232. Another part of the drilling fluid flows downward in the diverter pipe 3 through the inlet channel 32. The drilling fluid in the inlet channel 32 flows through the start-up inlet channel 34, the first reduced diameter flow channel 36 and the outlet hole 35 to the drill bit.

[0070] When the impact mechanism 4 is in the downward stroke, the drilling fluid in the liquid inlet channel 32 enters the impact groove 24 through the starting liquid inlet channel 34, the upper starting hole 4121 and the first upper hydraulic hole 423 in sequence. At the discharge chamfer 263 of the hammer cover 26, due to the water wedge effect, the drilling fluid exerts pressure on the outer slider 421 to push the hydraulic hammer tube 42 to move downward. At the same time, the hydraulic hammer tube 42 drives the starting tube 41 to move downward and impact the hammer housing 27 through the cooperation of the inner slider 422 and the hydraulic groove 411. When the slider 421 moves downward to the bottom wall of the impact groove 24, the drilling fluid in the diversion channel 23 enters the hydraulic groove 411 through the upper diversion hole 231 and the second upper hydraulic hole 425 in sequence, and the drilling fluid applies pressure to the inner slider 422 to push the starter tube 41 to continue to move downward so that the hydraulic hammer tube 42 impacts the hammer housing 27 again to complete the downward stroke, thereby generating longitudinal vibration, so that the hammer housing 27 obtains a larger instantaneous impact force and transmits it to the drill bit, thereby increasing the drilling pressure and improving the rock breaking efficiency;

[0071] When the impact mechanism 4 is in the upstroke, the drilling fluid in the liquid inlet channel 32 enters the impact groove 24 through the starting liquid inlet channel 34, the lower starting hole 4122 and the first lower hydraulic hole 424 in turn, and the drilling fluid applies pressure to the outer slider 421 to push the hydraulic hammer tube 42 to move upward. At the same time, the hydraulic hammer tube 42 drives the starting tube 41 to move upward through the cooperation of the inner slider 422 and the hydraulic groove 411. When the outer slider 421 moves upward to abut against the hammer pressure cover 26, the drilling fluid in the guide channel 23 enters the hydraulic groove 411 through the middle guide hole 233 and the second lower hydraulic hole 426 in turn, and the drilling fluid applies pressure to the inner slider 422 to push the starting tube 41 to continue to move upward to complete the upstroke, so that the hydraulic hammer tube 42 reciprocates up and down, so that the hydraulic axial vibration impact rock breaker of the present invention can continuously hammer the rock up and down, reduce the rock strength, improve the rock drillability, and make full use of the hydraulic energy of the drilling fluid, so that resources are reasonably and efficiently used.

[0072] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A hydraulic axial vibration impact rock breaker, characterized in that: include, an outer shell having a central passage; A hammer outer body is inserted into the central channel, the hammer outer body has an impact cavity, and the lower end of the hammer outer body is connected to the lower end of the outer shell; A shunt pipe is located in the central channel, an outer shunt channel is formed between the upper end of the shunt pipe and the outer shell, the lower end of the shunt pipe is arranged in the impact chamber, the shunt pipe has a liquid inlet channel, and the shunt pipe is respectively provided with a shunt liquid inlet hole, a start-up liquid inlet channel and a liquid outlet hole connected to the liquid inlet channel from top to bottom, the shunt liquid inlet hole is connected to the outer shunt channel, and the start-up liquid inlet channel and the liquid outlet hole are respectively connected to the impact chamber; An impact mechanism is sleeved on the shunt pipe and arranged opposite to the starting liquid inlet channel, the impact mechanism comprises a starting pipe and a hydraulic hammer pipe, the starting pipe is sleeved on the shunt pipe axially movably, the hydraulic hammer pipe is sleeved on the starting pipe axially movably, and the hydraulic hammer pipe can impact the hammer outer body under the drive of the starting pipe; The starter tube has hydraulic grooves and a starter flow channel staggered in the circumferential direction, the hydraulic grooves are opened on the outer wall of the starter tube, and the starter flow channel includes an upper starter hole and a lower starter hole; The hydraulic hammer tube has an outer slider and an inner slider arranged alternately in the circumferential direction, the outer slider is arranged on the outer wall of the hydraulic hammer tube, the inner slider is arranged on the inner wall of the hydraulic hammer tube and extends into the hydraulic groove, and the hydraulic hammer tube is also provided with a first upper hydraulic hole and a first lower hydraulic hole located on both sides of the outer slider, and a second upper hydraulic hole and a second lower hydraulic hole located on both sides of the inner slider; Wherein, the first upper liquid moving hole can be connected to the starting liquid inlet channel of the diverter tube through the upper starting hole, and the first lower liquid moving hole can be connected to the starting liquid inlet channel of the diverter tube through the lower starting hole; An impact groove is formed on the inner wall of the hammer outer body, the outer slider can move axially in the impact groove, and the outer slider has a state of abutting against the bottom wall of the impact groove and a state of abutting against the top wall of the impact groove.

2. The hydraulic axial vibration impact rock breaker according to claim 1, characterized in that: An axial leakage groove is formed on the outer wall of the starting tube, and the axial leakage groove is communicated with the impact chamber.

3. The hydraulic axial vibration impact rock breaker according to claim 1, characterized in that: An external flow passage is formed between the hammer outer body and the outer shell, the external flow passage is connected with the external diversion passage, a flow guide passage is provided on the hammer outer body, and the external flow passage is connected with the impact chamber through the flow guide passage.

4. The hydraulic axial vibration impact rock breaker according to claim 3 is characterized in that: The guide channel includes an upper guide hole located at the upper part of the hammer outer body, a lower guide hole located at the lower part of the hammer outer body, and an intermediate guide hole located between the upper guide hole and the lower guide hole; wherein the lower guide hole is connected to the liquid outlet hole of the diverter pipe.

5. The hydraulic axial vibration impact rock breaker according to claim 4, characterized in that: The impact grooves and the guide channels are arranged alternately along the circumferential direction of the hammer outer body.

6. The hydraulic axial vibration impact rock breaker according to claim 5, characterized in that: When the outer sliding block abuts against the bottom wall of the impact groove, the outer flow passage is connected to the hydraulic groove through the middle guide hole and the second lower hydraulic hole, and the outer flow passage is connected to the inner channel of the hydraulic hammer tube through the lower guide hole.

7. The hydraulic axial vibration impact rock breaker according to claim 5, characterized in that: When the outer sliding block abuts against the top wall of the impact groove, the outer flow passage is communicated with the hydraulic groove through the upper flow guide hole and the second upper hydraulic hole.

8. The hydraulic axial vibration impact rock breaker according to claim 5, characterized in that: The inner wall of the hammer outer body is formed with at least one drainage groove, and the drainage groove is extended along the axial direction of the hammer outer body; The upper end of the discharge groove is connected to the impact groove, and the lower end of the discharge groove is connected to the impact cavity.

9. The hydraulic axial vibration impact rock breaker according to claim 5, characterized in that: The inner wall of the hammer outer body is provided with two impact grooves arranged in a radially opposite manner, and the outer wall of the hydraulic hammer tube is provided with two outer sliding blocks arranged in a radially opposite manner. The two outer sliding blocks are respectively axially movable in the corresponding impact grooves.

10. The hydraulic axial vibration impact rock breaker according to any one of claims 1 to 9, characterized in that: The outer wall of the starting tube is provided with two radially oppositely arranged hydraulic grooves, and the inner wall of the hydraulic hammer tube is provided with two radially oppositely arranged inner sliding blocks, and the two inner sliding blocks can be axially moved in the corresponding hydraulic grooves respectively.

11. The hydraulic axial vibration impact rock breaker according to claim 1, characterized in that: A first reduced diameter flow channel is provided in the diverter pipe, and the first reduced diameter flow channel is located between the starting liquid inlet channel and the liquid outlet hole.

12. The hydraulic axial vibration impact rock breaker according to claim 1 or 11, characterized in that: The shunt pipe has a second reduced diameter flow channel in it, and the second reduced diameter flow channel is located between the shunt liquid inlet hole and the start-up liquid inlet channel.

13. The hydraulic axial vibration impact rock breaker according to claim 1, characterized in that: The hammer outer body comprises a hammer pressure cover and a hammer outer shell which are snap-fitted together, the impact cavity is formed between the hammer pressure cover and the hammer outer shell, a plurality of plug-in protrusions are arranged at intervals along the circumferential direction on the outer wall of the lower end of the hammer outer shell, a plurality of plug-in grooves are arranged at intervals along the circumferential direction on the lower end of the outer shell, and a plurality of the plug-in protrusions can be inserted into the plurality of the plug-in grooves.

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