CN219733296U - Multi-directional impact drilling tool - Google Patents

Abstract

The utility model relates to a multidirectional impact drilling tool, which comprises a shell body, wherein a rotary impact structure is arranged in the shell body, a support structure is arranged between the rotary impact structure and a drill bit seat, the support structure comprises a spiral support and a wedge support, a first wedge block is arranged at the bottom end of the spiral support, and two side walls in the circumferential direction of the first wedge block are respectively a first wedge supporting surface and a second wedge supporting surface; the top end of the wedge-shaped support is provided with a second wedge-shaped block, and two side walls in the circumferential direction of the second wedge-shaped block are respectively a third wedge-shaped supporting surface and a fourth wedge-shaped supporting surface; the spiral support can rotate along with the throttling support body to enable the first wedge-shaped supporting surface to be abutted against the third wedge-shaped supporting surface, and the spiral support can rotate along with the throttling support body to enable the second wedge-shaped supporting surface to be abutted against the fourth wedge-shaped supporting surface. The utility model can generate forward torsion impact and downward axial impact, realizes the breaking of the rock at the front end and the lower end of the drill bit, increases the utilization of reverse torsion impact load, and obviously improves the rock breaking efficiency of the drill bit.

Description

Multi-directional impact drilling tool

Technical Field

The utility model relates to a downhole drilling tool in the field of petroleum development, in particular to a multidirectional impact drilling tool.

Background

In the drilling engineering, with the development of petroleum exploration technology, various problems appear in the petroleum drilling process, and in the drilling process of deep wells and ultra-deep wells, the difficulty is that the hardness of the rock is high, and the energy required by breaking is large. In a deep well, due to the fact that the hardness of rock is high, reverse torsion force applied to the drill bit for cutting the rock is too large, the drilling tool is easy to clamp, the situation that the rock cannot be broken occurs, and therefore the drilling process is stopped, and even the drilling tool can be damaged.

In order to further increase the rate of penetration in deep wells, some scholars have proposed to achieve rapid rock breaking by means of impact and developed corresponding impact drilling tools. Currently, impact type well tools can be classified into: axial impact drilling tools, torsional impact drilling tools, and composite impact drilling tools. Wherein the axial impact drilling tool generates downward axial impact load to realize the volume crushing of the rock at the lower end of the drill bit. Torsional impact drilling tools provide reciprocating tangential impact loading to the drill bit, increasing the cutting torque of the cutting teeth of the drill bit, and simultaneously, the high frequency torsional vibrations generated improve the cutting state of the drill bit. The composite impact drilling tool integrates axial impact load and torsional impact load, and increases axial and tangential load peaks at the same time, so that quick rock breaking is realized.

From the application condition of the tool at present, the torsion impact drilling tool has higher feasibility of being matched with a downhole power drilling tool due to the shorter length, so that the application range of the tool is greatly increased. Conventional torsional impact drilling tools are designed to convert hydraulic energy into torsional impact loads by reciprocating an internal ram. The reciprocating torsional impact generated by the tool can increase the cutting torque of the drill bit (consistent with the rotation direction of the drill string) and is directly used for breaking rock, and the reverse torsional impact (opposite to the rotation direction of the drill string) can reduce the cutting torque of the drill bit and is unfavorable for breaking rock, so that the energy utilization efficiency of the tool is not high.

In order to further increase the rate of penetration based on a torsional impact drilling tool, the energy utilization rate of the torsional impact may be increased, and the reverse torsional impact load may be used to break the rock.

Accordingly, the present inventors have developed a multi-directional impact drilling tool to overcome the shortcomings of the prior art by years of experience and practice in the relevant industry.

Disclosure of Invention

The utility model aims to provide a multidirectional impact drilling tool which generates forward torsion impact and downward axial impact, realizes the breaking of rocks at the front end and the lower end of a drill bit, increases the utilization of reverse torsion impact load and obviously improves the rock breaking efficiency of the drill bit.

The utility model aims at realizing the multi-directional impact drilling tool, which comprises a shell body, wherein the bottom end of the shell body is connected with a drill bit seat; the rotary impact structure comprises a screen pipe, a steering gear, a pendulum bob and a throttle support body which are coaxially sleeved from inside to outside, wherein the pendulum bob can swing back and forth around a central shaft of the shell body to impact the throttle support body to generate impact load; a support structure is arranged between the rotary impact structure and the drill bit seat, the support structure comprises a spiral support fixedly connected with the throttling support body and a wedge-shaped support connected with the top end of the drill bit seat, a first wedge block is arranged at the bottom end of the spiral support, and two side walls in the circumferential direction of the first wedge block are respectively a first wedge-shaped supporting surface and a second wedge-shaped supporting surface; the top end of the wedge-shaped support is provided with a second wedge-shaped block, and two side walls in the circumferential direction of the second wedge-shaped block are respectively a third wedge-shaped supporting surface and a fourth wedge-shaped supporting surface; the spiral support can rotate along with the throttling support body to enable the first wedge-shaped supporting surface to abut against the third wedge-shaped supporting surface so as to equally decompose impact load into first axial load and first radial load; the screw mount is rotatable with the throttle support to bring the second wedge-shaped support surface into abutment with the fourth wedge-shaped support surface to break down the impact load into a second axial load and a second radial load, the second axial load being greater than the second radial load.

In a preferred embodiment of the present utility model, the first wedge-shaped supporting surface and the third wedge-shaped supporting surface are both disposed at an angle of 45 ° to the horizontal plane; the included angle between the second wedge-shaped supporting surface and the horizontal plane is 10-15 degrees; the included angle between the fourth wedge-shaped supporting surface and the horizontal plane is 10-15 degrees.

In a preferred embodiment of the present utility model, the bottom end of the housing body is connected with a drill bit seat housing, a first ring groove is formed on the inner wall of the drill bit seat housing from top to bottom, and the side wall of the first ring groove is sleeved and connected to the side wall of the housing body; the bottom of the first annular groove is provided with a spline groove downwards, the outer wall of the drill bit seat is provided with a spline, and the drill bit seat shell are connected in a matched mode through the spline and the spline groove.

In a preferred embodiment of the present utility model, the wedge-shaped support includes a second ring body, a connection tooth is disposed at a bottom end of the second ring body, a connection tooth slot is disposed at a top end of the drill bit seat, and the wedge-shaped support is connected with the drill bit seat through the connection tooth and the connection tooth slot.

In a preferred embodiment of the present utility model, the screw support includes a first ring body, the bottom end of the first ring body is provided with the first wedge block, the first ring body is provided with a through connection hole, and a screw capable of being connected with the throttle support body is inserted into the connection hole.

In a preferred embodiment of the present utility model, a first central hole is axially and penetratingly arranged on the housing body, a second central hole is axially and penetratingly arranged on the screen pipe, a third central hole is axially and penetratingly arranged on the drill bit seat, and the second central hole is communicated with the first central hole and the third central hole;

the throttling support body comprises a support body which is axially fixed and can swing circumferentially, support body sector protruding blocks are symmetrically arranged on the inner wall of the support body in a radial direction, a support body sector groove is formed between two adjacent support body sector protruding blocks, and the pendulum bob is sleeved in the support body and can swing to impact the side wall of the support body sector groove; the bottom end of the support body fan-shaped groove can be communicated with the second center hole; the fan-shaped convex blocks of the supporting body are provided with supporting body through-flow grooves which are communicated with the first central holes and the third central holes in the axial direction; radial through support body through grooves are respectively formed in the two sides of the support body through flow grooves on the support body fan-shaped protruding blocks, support body outer grooves are formed in the outer wall of the support body at positions corresponding to the support body through grooves from top to bottom, and the bottom ends of the support body outer grooves are in closed arrangement; the bottom of the support body is fixedly connected with the spiral support.

In a preferred embodiment of the present utility model, the pendulum includes a pendulum body axially fixed and rotatably sleeved in the support body, outer fan-shaped protrusions of the pendulum are radially symmetrically disposed on an outer wall of the pendulum body, first and second pendulum penetrating grooves radially penetrating through are respectively disposed on two circumferential sides of the outer fan-shaped protrusions of the pendulum, inner fan-shaped protrusions of the pendulum are radially symmetrically disposed on an inner wall of the pendulum body, third and fourth pendulum penetrating grooves radially penetrating through are respectively disposed on two circumferential sides of the inner fan-shaped protrusions of the pendulum, and each outer fan-shaped protrusion of the pendulum is sleeved in each fan-shaped groove of the support body and is capable of swinging to impact a side wall of the fan-shaped groove of the support body.

In a preferred embodiment of the present utility model, the diverter includes a diverter body axially fixed and rotatably sleeved between the screen pipe and the pendulum body, first diverter fan-shaped protrusions are radially symmetrically arranged on an outer wall of the diverter body, first diverter through grooves and second diverter through grooves which are radially penetrated are circumferentially arranged on each first diverter fan-shaped protrusion at intervals, the first diverter through grooves can be communicated with the first pendulum through grooves or the second pendulum through grooves, and the second diverter through grooves can be communicated with the first pendulum through grooves or the second pendulum through grooves;

the outer wall of the steering gear body is provided with second steering gear fan-shaped protruding blocks in a radial symmetrical mode, the second steering gear fan-shaped protruding blocks are provided with steering gear outer channels along the axial direction, the bottom ends of the steering gear outer channels are open, the top ends of the steering gear outer channels are closed, and each pendulum inner fan-shaped protruding block can be sleeved in each steering gear outer channel in a swinging mode respectively; the first steering gear sector-shaped protruding blocks and the second steering gear sector-shaped protruding blocks are arranged in a circumferential staggered mode, and steering gear through-flow grooves are formed between the first steering gear sector-shaped protruding blocks and the adjacent second steering gear sector-shaped protruding blocks; the axial length of the first diverter fan tab and the second diverter fan tab is less than the axial length of the diverter body.

In a preferred embodiment of the utility model, the screen pipe is sleeved in the steering gear body, and an inclined screen pipe penetrating groove is arranged on the side wall of the screen pipe; the bottom end of the screen pipe is provided with a screen pipe base, the side wall of the screen pipe base is provided with a base overflow hole which is obliquely communicated, the base overflow hole can be communicated with the diverter overflow groove and the second central hole, the screen pipe base is fixedly connected with the spiral support, the screen pipe is provided with a wear pad above the screen pipe base, and the bottom end of the diverter body is propped against the wear pad; and a nozzle is arranged above the screen pipe base in the screen pipe.

In a preferred embodiment of the present utility model, an end cover is disposed above the rotary impact structure in the first central hole, the end cover includes an end cover body, an end cover boss, and an end cover head, and a fourth central hole is disposed on the end cover in an axial through manner, and the fourth central hole is in axial communication with the first central hole and the second central hole; the outer wall of the end cover body is in sealing propping against the inner wall of the shell body, and the top end of the end cover head is in axial propping against the shell body;

the top ends of the throttling support body and the sieve tube are fixedly connected with the end cover body; the end cover body is provided with an end cover communication hole along the circumferential direction, the side wall of the end cover convex column is provided with an end cover side wall through groove, and the fourth center hole, the end cover side wall through groove, the end cover communication hole and the support body outer groove are communicated.

From the above, the multi-directional percussion drilling tool of the present utility model has the following beneficial effects:

the multidirectional impact drilling tool is simple in structure and long in service life, the axial component force and the radial component force provided by one group of wedge-shaped supporting surfaces for the drill bit are approximately 1:1, the force provided by the other group of wedge-shaped supporting surfaces for the drill bit is mainly the axial component force, the axial cutting load of the drill bit on rock is increased, and the downward rock breaking effect of the drill bit is further increased; when the drilling tool repeatedly rotates to break rock, the drilling tool simultaneously generates forward torsion impact and downward axial impact through a group of wedge-shaped supporting surfaces when being locked in forward rotation, and is used for breaking the rock at the front end and the lower end of the cutting teeth of the drilling bit; when the drilling tool is locked in reverse rotation, reverse torsion impact of the other group of wedge-shaped supporting surfaces is converted into downward axial impact for breaking the rock at the lower end of the cutting teeth of the drill bit; the multidirectional impact drilling tool can apply most impact load to rock breaking, has high energy utilization rate, is used for assisting a drill bit in breaking rock, and improves the mechanical drilling speed.

Drawings

The following drawings are only for purposes of illustration and explanation of the present utility model and are not intended to limit the scope of the utility model. Wherein:

fig. 1: is an exterior view of the multi-directional impact drilling tool of the present utility model.

Fig. 2: is a sectional view B-B in FIG. 1.

Fig. 3: an enlarged view of the position I in FIG. 2.

Fig. 4: is a schematic illustration of the support structure of the present utility model.

Fig. 5: a schematic view of the abutment structure when the first wedge supporting surface abuts against the third wedge supporting surface.

Fig. 6: a schematic view of the abutment structure when the second wedge supporting surface abuts against the fourth wedge supporting surface.

Fig. 7: is a schematic view of the throttle support of the present utility model.

Fig. 8: is a schematic illustration of the pendulum of the present utility model.

Fig. 9: is a schematic illustration of the diverter of the present utility model.

Fig. 10: a schematic of a screen of the present utility model.

Fig. 11: is a schematic illustration of an end cap of the present utility model.

Fig. 12: is a schematic illustration of the wedge mount of the present utility model.

Fig. 13: is a cross-sectional view A-A in the first state of the utility model.

Fig. 14: is a cross-sectional view of A-A in the second state of the utility model.

Fig. 15: is a cross-sectional view of A-A in the third state of the utility model.

Fig. 16: A-A cross-sectional view in the fourth state of the utility model.

In the figure:

1. a housing body;

2. an end cap; 21. an end cap body; 22. an end cap post; 23. an end cap head; 24. an end cover communicating hole; 25. the side wall of the end cover is provided with a through groove;

3. a rotary impact structure;

31. a screen pipe; 311. a sieve tube penetrating groove; 312. a screen base; 3121. a base overflow hole;

32. a diverter; 321. a first diverter fan-shaped tab; 3211. a first diverter penetration groove; 3212. the second diverter penetrates the trough; 322. a second diverter fan-shaped tab; 3221. a diverter outer channel; 323. the diverter passes through the flow channel;

33. a pendulum; 331. a fan-shaped lug outside the pendulum; 3311. the first pendulum bob penetrates the groove; 3312. the second pendulum bob penetrates the groove; 332. fan-shaped protruding blocks in the pendulum bob; 3321. a third pendulum penetration groove; 3322. a fourth pendulum penetration groove;

34. a throttle support; 341. a support body fan-shaped protruding block; 3411. the support body passes through the flow groove; 342. a support body sector groove; 343. the supporting body penetrates through the groove; 344. the support body is provided with an outer channel;

4. a drill bit seat; 41. connecting tooth grooves;

5. a support structure; 51. a spiral support; 511. a first wedge block; 5111. a first wedge-shaped support surface; 5112. a second wedge-shaped support surface; 512. a first annular body; 52. a wedge-shaped support; 521. a second wedge block; 5211. a third wedge-shaped support surface; 5212. a fourth wedge-shaped support surface; 522. a second annular body; 523. connecting convex teeth;

6. a drill bit holder housing;

7. wear-resistant plate;

8. and (3) a nozzle.

Detailed Description

For a clearer understanding of technical features, objects, and effects of the present utility model, a specific embodiment of the present utility model will be described with reference to the accompanying drawings.

The specific embodiments of the utility model described herein are for purposes of illustration only and are not to be construed as limiting the utility model in any way. Given the teachings of the present utility model, one of ordinary skill in the related art will contemplate any possible modification based on the present utility model, and such should be considered to be within the scope of the present utility model. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The utility model provides a multidirectional impact drilling tool, which is shown in fig. 1 to 12, and comprises a shell body 1, wherein an outer cone thread for being connected with a drill collar in a sealing way is arranged on the outer wall of the top end of the shell body 1, and the bottom end of the shell body 1 is connected with a drill bit seat 4; a rotary impact structure 3 is arranged in the shell body 1, the rotary impact structure 3 comprises a screen pipe 31, a steering gear 32, a pendulum 33 and a throttle support 34 which are coaxially sleeved from inside to outside, and the pendulum 33 can reciprocate around the central shaft of the shell body 1 to impact the throttle support 34 to generate impact load; a support structure 5 is arranged between the rotary impact structure 3 and the drill bit seat 4, the support structure 5 comprises a spiral support 51 fixedly connected with the throttling support body 34 and a wedge support 52 connected with the top end of the drill bit seat 4, a first wedge-shaped block 511 is arranged at the bottom end of the spiral support 51, and two side walls in the circumferential direction of the first wedge-shaped block 511 are respectively provided with a first wedge-shaped support surface 5111 and a second wedge-shaped support surface 5112; the top end of the wedge-shaped support 52 is provided with a second wedge-shaped block 521, and two side walls in the circumferential direction of the second wedge-shaped block 521 are respectively a third wedge-shaped supporting surface 5211 and a fourth wedge-shaped supporting surface 5212; the screw seat 51 can rotate with the throttle support 34 to bring the first wedge supporting surface 5111 into abutment with the third wedge supporting surface 5211 (as shown in fig. 5) to equally split the impact load into a first axial load and a first radial load; the screw seat 51 can rotate with the throttle support 34 to bring the second wedge supporting surface 5112 into abutment with the fourth wedge supporting surface 5212 (as shown in fig. 6) to break down the impact load into a second axial load and a second radial load, the second axial load being greater than the second radial load. The first wedge 511 of the screw seat 51 cooperates with different wedge faces of the wedge seat 52 to provide axial and radial forces of different proportional magnitudes to the drill tool for breaking.

Under the action of drilling fluid, the pendulum bob 33 swings back and forth to impact the throttle support 34 to generate impact load and transmit the impact load to the spiral support 51, and the spiral support 51 and the wedge support 52 transmit the load through the wedge support surface in a matching way; in an embodiment of the present utility model, the screw support 51 rotates clockwise (the direction is determined according to the practical situation, and the clockwise direction is the clockwise direction in the embodiment, and the anticlockwise direction) along with the throttle support 34 until the first wedge-shaped support surface 5111 abuts against the third wedge-shaped support surface 5211, and the impact load is equally divided into a first axial load and a first radial load, so that the axial component and the radial component provided to the drill bit are approximately 1:1; the spiral support 51 rotates anticlockwise along with the throttling support body 34 until the second wedge-shaped support surface 5112 abuts against the fourth wedge-shaped support surface 5212, the impact load is decomposed into a second axial load and a second radial load, the second axial load is larger than the second radial load, and in order to increase the downward rock breaking effect of the drill bit, the included angle between the second wedge-shaped support surface 5112 and the fourth wedge-shaped support surface 5212 and the horizontal plane is as small as possible, so that the rotation blocking is achieved, at the moment, the force provided by the impact load for the drill bit is mainly the axial load, and the axial cutting load of the drill bit on rock is increased.

The multidirectional impact drilling tool is simple in structure and long in service life, the axial component force and the radial component force provided by one group of wedge-shaped supporting surfaces for the drill bit are approximately 1:1, the force provided by the other group of wedge-shaped supporting surfaces for the drill bit is mainly the axial component force, the axial cutting load of the drill bit on rock is increased, and the downward rock breaking effect of the drill bit is further increased; when the drilling tool repeatedly rotates to break rock, the drilling tool simultaneously generates forward torsion impact and downward axial impact through a group of wedge-shaped supporting surfaces when being locked in forward rotation, and is used for breaking the rock at the front end and the lower end of the cutting teeth of the drilling bit; when the drilling tool is locked in reverse rotation, reverse torsion impact of the other group of wedge-shaped supporting surfaces is converted into downward axial impact for breaking the rock at the lower end of the cutting teeth of the drill bit; the multidirectional impact drilling tool can apply most impact load to rock breaking, has high energy utilization rate, is used for assisting a drill bit in breaking rock, and improves the mechanical drilling speed.

Further, in an embodiment of the present utility model, the first wedge supporting surface 5111 and the third wedge supporting surface 5211 are disposed at an angle of 45 ° with respect to the horizontal plane, so as to satisfy the equivalent decomposition of the impact load in the axial direction and the radial direction; the included angle between the second wedge-shaped supporting surface 5112 and the horizontal plane is 10-15 degrees; the included angle between the fourth wedge-shaped supporting surface 5212 and the horizontal plane is 10-15 degrees, the inclination angle range is adjustable, and the inclination angle range is as small as possible under the condition of meeting the clamping fit of the wedge-shaped surface so as to meet the requirement that most of impact load is decomposed into axial load.

Further, as shown in fig. 2, the drill bit seat 4 is coaxially and fixedly sleeved in the housing body 1 from outside to inside, the bottom end of the housing body 1 is connected with the drill bit seat housing 6, the inner wall of the drill bit seat housing 6 is provided with a first annular groove from top to bottom, and the side wall of the first annular groove is sleeved on the side wall of the housing body 1; the groove bottom of the first annular groove is downwards provided with a spline groove, the outer wall of the drill bit seat 4 is provided with a spline, and the drill bit seat 4 is connected with the drill bit seat shell 6 in a matched manner through the spline and the spline groove. The bottom end of the housing body 1 is clamped between the drill bit seat 4 and the drill bit seat housing 6. The drill bit seat 4 is more convenient to install and has better connection stability.

Further, as shown in fig. 4 and 12, the wedge-shaped support 52 includes a second ring body 522, a connection tooth 523 is provided at the bottom end of the second ring body 522, a connection tooth slot 41 is provided at the top end of the drill bit holder 4, and the wedge-shaped support 52 is connected with the drill bit holder 4 through the connection tooth 523 and the connection tooth slot 41. In an embodiment of the present utility model, the bottom end of the second ring body 522 is provided with 3 second wedge-shaped blocks 521 uniformly distributed in the circumferential direction.

Further, as shown in fig. 4, the screw support 51 includes a first ring body 512, a first wedge 511 is disposed at a bottom end of the first ring body 512, a through connection hole is disposed on the first ring body 512, and a screw capable of being connected with the throttle support body is inserted into the connection hole. In an embodiment of the present utility model, the bottom end of the first ring body 512 is provided with 3 first wedge blocks 511 uniformly distributed in the circumferential direction.

Further, a first central hole is formed in the shell body 1 in an axial through manner, a second central hole is formed in the screen pipe 31 in an axial through manner, a third central hole is formed in the drill bit seat 4 in an axial through manner, and the second central hole is communicated with the first central hole and the third central hole; the end of the third central hole, which is far away from the housing body 1, is provided with an internal conical thread for connecting a drill bit.

As shown in fig. 2 and 7, the throttle support 34 includes a support body that is axially fixed and can swing circumferentially, support sector-shaped protruding blocks 341 are symmetrically arranged on the inner wall of the support body in a radial direction, a support sector-shaped groove 342 is formed between two adjacent support sector-shaped protruding blocks 341, and a pendulum 33 is sleeved in the support body and can swing to impact the side wall of the support sector-shaped groove 342; the bottom end of the support body fan-shaped groove 342 can be communicated with the second center hole; the support body fan-shaped protruding block 341 is provided with a support body through-flow groove 3411 which is penetrated along the axial direction, and the support body through-flow groove 3411 can be communicated with the first central hole and the third central hole; the support body fan-shaped convex blocks 341 are respectively provided with a support body penetrating groove 343 which is penetrated in the radial direction at two sides of the support body passing groove 3411, the outer wall of the support body is provided with a support body outer channel 344 from top to bottom at the position corresponding to the support body penetrating groove 343, and the bottom end of the support body outer channel 344 is arranged in a closed manner; the bottom of the support body is fixedly connected with the spiral support 51.

As shown in fig. 2 and 8, the pendulum 33 includes a pendulum body axially fixed and rotatably sleeved in the support body, a pendulum outer fan-shaped projection 331 is radially and symmetrically arranged on an outer wall of the pendulum body, a first pendulum penetration groove 3311 and a second pendulum penetration groove 3312 which are radially and completely arranged on two circumferential sides of the pendulum outer fan-shaped projection 331 are respectively arranged, a pendulum inner fan-shaped projection 332 is radially and symmetrically arranged on an inner wall of the pendulum body, a third pendulum penetration groove 3321 and a fourth pendulum penetration groove 3322 which are radially and completely arranged on two circumferential sides of the pendulum inner fan-shaped projection 332 are respectively arranged on two circumferential sides of the pendulum inner fan-shaped projection 332, and each pendulum outer fan-shaped projection 331 is sleeved in each support body fan-shaped groove 342 and can swing to impact a side wall of the support body fan-shaped groove 342. The bottom end of the pendulum body is rotatably sleeved and connected with the spiral support 51. The pendulum outer fan-shaped protruding block 331 and the pendulum inner fan-shaped protruding block 332 are arranged in a crisscross manner.

As shown in fig. 2 and 9, the diverter 32 comprises a diverter body which is axially fixed and rotatably sleeved between the screen 31 and the pendulum body, first diverter fan-shaped convex blocks 321 are symmetrically arranged on the outer wall of the diverter body in a radial direction, first diverter through grooves 3211 and second diverter through grooves 3212 which are radially communicated are arranged on the first diverter fan-shaped convex blocks 321 at intervals along the circumferential direction, the first diverter through grooves 3211 can be communicated with the first pendulum through grooves 3311 or the second pendulum through grooves 3312, and the second diverter through grooves 3212 can be communicated with the first pendulum through grooves 3311 or the second pendulum through grooves 3312;

the outer wall of the steering gear body is provided with second steering gear fan-shaped convex blocks 322 in a radial symmetrical way, the second steering gear fan-shaped convex blocks 322 are provided with steering gear outer channels 3221 along the axial direction, the bottom end of each steering gear outer channel 3221 is open, the top end of each steering gear outer channel 3221 is closed, and each pendulum inner fan-shaped convex block 332 is sleeved in each steering gear outer channel 3221 in a swinging way respectively; the first diverter fan-shaped protruding block 321 and the second diverter fan-shaped protruding block 322 are arranged in a circumferential staggered mode (crisscrossed), and a diverter through-flow groove 323 is formed between the first diverter fan-shaped protruding block 321 and the adjacent second diverter fan-shaped protruding block 322; the axial length of the first diverter fan tab 321 and the second diverter fan tab 322 is less than the axial length of the diverter body.

As shown in fig. 2, 3 and 10, the screen 31 is sleeved in the steering gear body, and an inclined screen penetration groove 311 is arranged on the side wall of the screen 31; the bottom end of the screen pipe 31 is provided with a screen pipe base 312, the side wall of the screen pipe base 312 is provided with a base overflow hole 3121 which is obliquely communicated, the base overflow hole 3121 can be communicated with a steering gear overflow groove 323 and a second center hole, the screen pipe base 312 is fixedly connected with the spiral support 51, the screen pipe 31 is provided with a wear pad 7 above the screen pipe base 312, the bottom end of the steering gear body is propped against the wear pad 7, and the bottom end of the steering gear body is in sleeved connection with the screen pipe 31 through the wear pad 7; a nozzle 8 is provided in the screen 31 above the screen base. The nozzle 8 is sleeved inside the screen pipe 31, the cut-off amount of drilling fluid in the inner diameter of the nozzle 8 is smaller than the cut-off amount of the screen pipe 31, the drilling fluid flowing through the screen pipe 31 generates pressure drop at the nozzle 8, and the nozzle 8 has a pressurizing effect on the drilling fluid in the screen pipe 31.

As shown in fig. 2 and 11, an end cover 2 is arranged above the rotary impact structure in the first central hole, the end cover 2 comprises an end cover body 21, an end cover convex column 22 and an end cover head 23, a fourth central hole is arranged on the end cover in an axial through manner, and the fourth central hole is axially communicated with the first central hole and the second central hole; the outer wall of the end cover body 21 is in sealing propping against the inner wall of the shell body, and the top end of the end cover head 23 is in axial propping against the shell body;

the top ends of the throttle support 34 and the sieve tube 31 are fixedly connected with the end cover body 21, and in one embodiment, the top ends of the throttle support 34 are connected with the end cover body 21 through screws; the end cover body 21 is provided with an end cover communication hole 24 along the circumferential direction, the side wall of the end cover convex column 22 is provided with an end cover side wall through groove 25, and the fourth center hole, the end cover side wall through groove 25, the end cover communication hole 24 and the support body outer groove 344 are communicated.

The working process of the multi-directional impact drilling tool of the utility model is as follows:

with the pendulum 33 shown in fig. 13 rotated counterclockwise to the limit position as the first state, the pendulum inner fan-shaped projection 332 abuts against the clockwise side of the deflector outer channel 3221, the first deflector penetration groove 3211 communicates with the first pendulum penetration groove 3311, and the support body fan-shaped groove 342, the second pendulum penetration groove 3312, and the deflector through-flow groove 323 communicate with the base through-flow hole 3121; the anticlockwise side of the diverter outer channel 3221, the third pendulum penetration groove 3321, the support penetration groove 343, and the support outer channel 344 are communicated; the high-pressure drilling fluid throttled and boosted by the nozzle 8 flows into the anticlockwise side (the left side of the pendulum outer fan-shaped convex block 331 in fig. 13) of the support body fan-shaped groove 342 through the screen pipe penetrating groove 311, the first steering gear penetrating groove 3211 and the first pendulum penetrating groove 3311 of the screen pipe 31, the high-pressure drilling fluid pushes the pendulum outer fan-shaped convex block 331 to rotate clockwise, the low-pressure drilling fluid on the clockwise side of the pendulum outer fan-shaped convex block 331 in the support body fan-shaped groove 342 flows downwards through the second pendulum penetrating groove 3312 and the steering gear penetrating groove 323 and the base penetrating hole 3121, a pressure difference is formed on two sides of the pendulum outer fan-shaped convex block 331, and the steering gear 32 is driven to synchronously rotate clockwise by pushing the pendulum 33, and the pendulum outer fan-shaped convex block 331 swings to the clockwise side of the support body fan-shaped concave block 342 to reach a second state;

the second state is as shown in fig. 14, the pendulum 33 rotates clockwise to the limit position, the pendulum outer fan-shaped projection 331 swings to the clockwise side of the support body fan-shaped groove 342, the pendulum inner fan-shaped projection 332 abuts against the clockwise side of the deflector outer channel 3221, the first deflector through groove 3211, the first pendulum through groove 3311, the support body fan-shaped groove 342 are communicated, the counterclockwise side of the deflector outer channel 3221, the third pendulum through groove 3321, the support body through groove 3411 are communicated, the support body outer channel 344, the support body through groove 343, the fourth pendulum through groove 3322 are communicated; the liquid at the third pendulum through groove 3321 is low-pressure drilling fluid, the high-pressure drilling fluid throttled and boosted by the nozzle 8 flows to one side clockwise of the steering gear outer channel 3221 through the fourth central hole, the end cover side wall through groove, the end cover communication hole, the support body outer channel 344, the support body through groove 343 and the fourth pendulum through groove 3322, and the two sides of the fan-shaped convex block 332 in the pendulum form pressure difference to push the steering gear 32 to rotate clockwise to reach a third state;

in the third state, as shown in fig. 15, the pendulum outer fan-shaped protrusion 331 swings to a clockwise side of the support body fan-shaped groove 342, the pendulum inner fan-shaped protrusion 332 abuts against a counterclockwise side of the diverter outer channel 3221, the second diverter through-channel 3212 and the second pendulum through-channel 3312 are communicated, the diverter outer channel 3221, the fourth pendulum through-channel 3322, the support body through-channel 343 and the support body outer channel 344 are communicated, and the support body fan-shaped groove 342, the first pendulum through-channel 3311 and the diverter through-channel 323 are communicated with the base through-flow hole 3121; the high-pressure drilling fluid throttled and boosted by the nozzle 8 flows into the clockwise side (the right side of the pendulum outer fan-shaped convex block 331 in fig. 15) of the support body fan-shaped groove 342 through the screen pipe penetrating groove 311, the second steering gear penetrating groove 3212 and the second pendulum penetrating groove 3312 of the screen pipe 31, the high-pressure drilling fluid pushes the pendulum outer fan-shaped convex block 331 to rotate anticlockwise, the low-pressure drilling fluid on the anticlockwise side of the pendulum outer fan-shaped convex block 331 in the support body fan-shaped groove 342 flows downwards through the first pendulum penetrating groove 3311 and the steering gear penetrating groove 323 and the base penetrating hole 3121, a pressure difference is formed on two sides of the pendulum outer fan-shaped convex block 331, the steering gear 32 is driven by the pushing pendulum 33 to synchronously rotate anticlockwise, and the pendulum outer fan-shaped convex block 331 swings to the anticlockwise side of the support body fan-shaped groove 342 to reach a fourth state;

in the fourth state, as shown in fig. 16, the pendulum 33 rotates counterclockwise to the limit position, the pendulum outer fan-shaped protrusion 331 swings to the counterclockwise side of the support body fan-shaped groove 342, the pendulum inner fan-shaped protrusion 332 abuts against the counterclockwise side of the deflector outer channel 3221, the second deflector through groove 3212, the second pendulum through groove 3312, and the support body fan-shaped groove 342 are communicated, the clockwise side of the deflector outer channel 3221, the fourth pendulum through groove 3322, and the support body through flow groove 3411 are communicated, and the support body outer channel 344, the support body through groove 343, and the third pendulum through groove 3321 are communicated;

the high-pressure drilling fluid throttled and boosted by the nozzle 8 flows to the anticlockwise side of the steering gear outer channel 3221 through the fourth center hole, the end cover side wall through groove, the end cover communication hole, the support body outer channel 344, the support body through groove 343 and the third pendulum through groove 3321, the fluid at the fourth pendulum through groove 3322 is low-pressure drilling fluid, the pressure difference is formed at the two sides of the fan-shaped convex block 332 in the pendulum, and the steering gear 32 is pushed to rotate anticlockwise and returns to the first state.

The pendulum 33 rotates clockwise to the limit position to perform forward torsional impact on the throttling support 34, the spiral support 51 rotates clockwise along with the throttling support 34 until the first wedge-shaped support surface 5111 abuts against the third wedge-shaped support surface 5211, the impact load is equally decomposed into a first axial load and a first radial load, the axial component and the radial component provided for the drill bit are approximately 1:1, and simultaneously torsional impact and downward axial impact are provided for the rock at the front end of the drill bit and the rock at the lower end of the drill bit;

when the pendulum 33 rotates anticlockwise to the limit position, reverse torsion impact is carried out on the throttling support body 34, the spiral support 51 rotates anticlockwise along with the throttling support body 34 until the second wedge-shaped support surface 5112 abuts against the fourth wedge-shaped support surface 5212, the impact load is decomposed into a second axial load and a second radial load, the second axial load is larger than the second radial load, in order to increase the downward rock breaking effect of the drill bit, the included angle between the second wedge-shaped support surface 5112 and the fourth wedge-shaped support surface 5212 and the horizontal plane is as small as possible, and the requirement for rotating and clamping is met.

From the above, the multi-directional percussion drilling tool of the present utility model has the following beneficial effects:

the multidirectional impact drilling tool is simple in structure and long in service life, the axial component force and the radial component force provided by one group of wedge-shaped supporting surfaces for the drill bit are approximately 1:1, the force provided by the other group of wedge-shaped supporting surfaces for the drill bit is mainly the axial component force, the axial cutting load of the drill bit on rock is increased, and the downward rock breaking effect of the drill bit is further increased; when the drilling tool repeatedly rotates to break rock, the drilling tool simultaneously generates forward torsion impact and downward axial impact through a group of wedge-shaped supporting surfaces when being locked in forward rotation, and is used for breaking the rock at the front end and the lower end of the cutting teeth of the drilling bit; when the drilling tool is locked in reverse rotation, reverse torsion impact of the other group of wedge-shaped supporting surfaces is converted into downward axial impact for breaking the rock at the lower end of the cutting teeth of the drill bit; the multidirectional impact drilling tool can apply most impact load to rock breaking, has high energy utilization rate, is used for assisting a drill bit in breaking rock, and improves the mechanical drilling speed.

The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this utility model, and are intended to be within the scope of this utility model.

Claims (10)

1. The multidirectional impact drilling tool is characterized by comprising a shell body, wherein the bottom end of the shell body is connected with a drill bit seat; the rotary impact structure comprises a screen pipe, a steering gear, a pendulum bob and a throttle support body which are coaxially sleeved from inside to outside, wherein the pendulum bob can swing back and forth around a central shaft of the shell body to impact the throttle support body to generate impact load; a support structure is arranged between the rotary impact structure and the drill bit seat, the support structure comprises a spiral support fixedly connected with the throttling support body and a wedge-shaped support connected with the top end of the drill bit seat, a first wedge block is arranged at the bottom end of the spiral support, and two side walls in the circumferential direction of the first wedge block are respectively a first wedge-shaped supporting surface and a second wedge-shaped supporting surface; the top end of the wedge-shaped support is provided with a second wedge-shaped block, and two side walls in the circumferential direction of the second wedge-shaped block are respectively a third wedge-shaped supporting surface and a fourth wedge-shaped supporting surface; the spiral support can rotate along with the throttling support body to enable the first wedge-shaped supporting surface to abut against the third wedge-shaped supporting surface so as to equally decompose impact load into first axial load and first radial load; the screw mount is rotatable with the throttle support to bring the second wedge-shaped support surface into abutment with the fourth wedge-shaped support surface to break down the impact load into a second axial load and a second radial load, the second axial load being greater than the second radial load.

2. The multi-directional impact drilling tool of claim 1 wherein the first wedge supporting surface and the third wedge supporting surface are each disposed at an angle of 45 ° to the horizontal; the included angle between the second wedge-shaped supporting surface and the horizontal plane is 10-15 degrees; the included angle between the fourth wedge-shaped supporting surface and the horizontal plane is 10-15 degrees.

3. The multi-directional impact drilling tool according to claim 1 or 2, wherein the bottom end of the housing body is connected with a drill bit seat housing, a first annular groove is formed in the inner wall of the drill bit seat housing from top to bottom, and the side wall of the first annular groove is sleeved and connected to the side wall of the housing body; the bottom of the first annular groove is provided with a spline groove downwards, the outer wall of the drill bit seat is provided with a spline, and the drill bit seat shell are connected in a matched mode through the spline and the spline groove.

4. A multi-directional impact drilling tool as claimed in claim 3 wherein the wedge support comprises a second annular body, the bottom end of the second annular body is provided with connecting teeth, the top end of the drill bit holder is provided with connecting tooth slots, and the wedge support is connected with the drill bit holder through the connecting teeth and the connecting tooth slots.

5. The multi-directional impact drilling tool of claim 1, wherein the screw support comprises a first annular body, the bottom end of the first annular body is provided with the first wedge-shaped block, the first annular body is provided with a through connecting hole, and a screw capable of being connected with the throttling support body is penetrated in the connecting hole.

6. A multi-directional percussion drilling tool according to claim 1,

the shell body is provided with a first central hole in an axial through mode, the screen pipe is provided with a second central hole in an axial through mode, the drill bit seat is provided with a third central hole in an axial through mode, and the second central hole is communicated with the first central hole and the third central hole;

the throttling support body comprises a support body which is axially fixed and can swing circumferentially, support body sector protruding blocks are symmetrically arranged on the inner wall of the support body in a radial direction, a support body sector groove is formed between two adjacent support body sector protruding blocks, and the pendulum bob is sleeved in the support body and can swing to impact the side wall of the support body sector groove; the bottom end of the support body fan-shaped groove can be communicated with the second center hole; the fan-shaped convex blocks of the supporting body are provided with supporting body through-flow grooves which are communicated with the first central holes and the third central holes in the axial direction; radial through support body through grooves are respectively formed in the two sides of the support body through flow grooves on the support body fan-shaped protruding blocks, support body outer grooves are formed in the outer wall of the support body at positions corresponding to the support body through grooves from top to bottom, and the bottom ends of the support body outer grooves are in closed arrangement; the bottom of the support body is fixedly connected with the spiral support.

7. The multi-directional impact drilling tool of claim 6, wherein the pendulum comprises a pendulum body axially fixed and rotatably sleeved in the support body, wherein radially symmetrical pendulum outer sector-shaped lugs are arranged on the outer wall of the pendulum body, radially through first pendulum through grooves and radially through second pendulum through grooves are respectively arranged on the circumferential two sides of the pendulum outer sector-shaped lugs, radially symmetrical pendulum inner sector-shaped lugs are arranged on the inner wall of the pendulum body, radially through third pendulum through grooves and radially through fourth pendulum through grooves are respectively arranged on the circumferential two sides of the pendulum inner sector-shaped lugs, and each pendulum outer sector-shaped lug is sleeved in each support body sector-shaped groove and can swing to impact the side wall of the support body sector-shaped groove.

8. A multi-directional percussion drilling tool according to claim 7,

the steering gear comprises a steering gear body which is axially fixed and rotatably sleeved between the screen pipe and the pendulum body, first steering gear fan-shaped protruding blocks are symmetrically arranged on the outer wall of the steering gear body in a radial direction, first steering gear through grooves and second steering gear through grooves which are radially communicated are arranged on the first steering gear fan-shaped protruding blocks at intervals along the circumferential direction, the first steering gear through grooves can be communicated with the first pendulum through grooves or the second pendulum through grooves, and the second steering gear through grooves can be communicated with the first pendulum through grooves or the second pendulum through grooves;

the outer wall of the steering gear body is provided with second steering gear fan-shaped protruding blocks in a radial symmetrical mode, the second steering gear fan-shaped protruding blocks are provided with steering gear outer channels along the axial direction, the bottom ends of the steering gear outer channels are open, the top ends of the steering gear outer channels are closed, and each pendulum inner fan-shaped protruding block can be sleeved in each steering gear outer channel in a swinging mode respectively; the first steering gear sector-shaped protruding blocks and the second steering gear sector-shaped protruding blocks are arranged in a circumferential staggered mode, and steering gear through-flow grooves are formed between the first steering gear sector-shaped protruding blocks and the adjacent second steering gear sector-shaped protruding blocks; the axial length of the first diverter fan tab and the second diverter fan tab is less than the axial length of the diverter body.

9. The multi-directional impact drilling tool of claim 8, wherein the screen is sleeved in the diverter body, and wherein a sloped screen penetration groove is provided on a sidewall of the screen; the bottom end of the screen pipe is provided with a screen pipe base, the side wall of the screen pipe base is provided with a base overflow hole which is obliquely communicated, the base overflow hole can be communicated with the diverter overflow groove and the second central hole, the screen pipe base is fixedly connected with the spiral support, the screen pipe is provided with a wear pad above the screen pipe base, and the bottom end of the diverter body is propped against the wear pad; and a nozzle is arranged above the screen pipe base in the screen pipe.

10. The multi-directional impact drilling tool of claim 9, wherein an end cap is disposed above the rotary impact structure in the first central bore, the end cap comprising an end cap body, an end cap post, and an end cap head, a fourth central bore being disposed axially therethrough, the fourth central bore being in axial communication with the first central bore and the second central bore; the outer wall of the end cover body is in sealing propping against the inner wall of the shell body, and the top end of the end cover head is in axial propping against the shell body;

the top ends of the throttling support body and the sieve tube are fixedly connected with the end cover body; the end cover body is provided with an end cover communication hole along the circumferential direction, the side wall of the end cover convex column is provided with an end cover side wall through groove, and the fourth center hole, the end cover side wall through groove, the end cover communication hole and the support body outer groove are communicated.