CN117027660A - Impact-cutting composite drill bit with planetary wheel balancing torque - Google Patents
Impact-cutting composite drill bit with planetary wheel balancing torque Download PDFInfo
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- CN117027660A CN117027660A CN202311009218.9A CN202311009218A CN117027660A CN 117027660 A CN117027660 A CN 117027660A CN 202311009218 A CN202311009218 A CN 202311009218A CN 117027660 A CN117027660 A CN 117027660A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 65
- 238000005553 drilling Methods 0.000 claims abstract description 59
- 239000012530 fluid Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000002441 reversible effect Effects 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling And Boring (AREA)
Abstract
The invention relates to the technical field of drilling and discloses an impact-cutting composite drill bit with planetary wheel balancing torque, which comprises an outer joint, a turbine component, a planetary wheel component and a drill bit component which are sequentially connected from top to bottom; the turbine assembly comprises a turbine sleeve, a turbine shaft, a turbine rotor and a turbine stator; the planet wheel assembly comprises an inner transmission shaft, a planet carrier top cover, a gear assembly, a planet carrier chassis, an upper convex disc sleeve and a lower convex disc sleeve which are sequentially arranged on the inner transmission shaft from top to bottom; the drill bit assembly includes an inner drill bit and an outer drill bit. According to the invention, through the structure of the planetary gear transmission inner and outer drill bits, the coaxial synchronous reverse rotation of the inner drill bit and the outer drill bit is realized, the self-balancing of the torque of the drilling tool is realized, and the drilling capability is improved. The drill bit bears periodic axial impact load through the upper convex disc sleeve and the lower convex disc sleeve, so that axial impact drilling is realized while inner drill bit is rotated and cut, and drilling efficiency is improved.
Description
Technical Field
The invention relates to the technical field of drilling, in particular to an impact-cutting composite drill bit with planetary wheel balancing torque.
Background
Along with the exploration and development of oil and gas resources at home and abroad and the massive utilization of the oil and gas resources, most of the oil and gas resources convenient to be mined are developed, and the oil and gas exploration and development of China gradually drills into hard formations such as deep wells, ultra-deep wells and the like and complex difficult-to-drill formations. The down-hole impactor is a rock breaking tool which is commonly applied in drilling construction, and can convert drilling fluid energy into a continuous, high-frequency and uniform impact torsion force which is directly applied to the PDC bit to assist the PDC bit in breaking rock. The high-frequency impact torque generated by the energy of the drilling fluid after being converted by a certain structure is transmitted to the drill bit through the drill bit joint, so that the drill bit uniformly and stably breaks rock, a high mechanical drilling speed can be obtained, the continuous tunneling of the impactor is ensured, and the purpose of prolonging the service life of the drill bit is achieved. In the drilling process of a deep well, the tension and rock resistance of the underground stratum are continuously increased along with the increase of the well depth, and the bit can not be applied with reactive torque by the stratum at the moment, so that the tool face of the bit is controlled unstably and even frequently deviates from the design track of the well. The directional engineer needs to frequently adjust the toolface to meet the borehole design trajectory, which not only increases the effort, but also greatly affects the drilling speed. The deep stratum has poor drillability and enhanced rock hardness, and the phenomena of drill sticking, stick-slip vibration and the like of the conventional rotary cutting drill bit can be caused, so that the abrasion of the drill bit is increased, the rock breaking efficiency is reduced, and the drilling period is prolonged. Therefore, the improvement of the mechanical drilling speed of the deep hard stratum and the prolongation of the service life of the underground drilling tool become the urgent problem to be solved in the exploitation of oil gas resources at home and abroad at present.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the impact-cutting composite drill bit with planetary wheel balancing torque, which can realize torque self-balancing in the drilling process and axial impact in the rotary cutting process, thereby improving the high directional drilling capability and precision of a drilling tool and improving the drilling efficiency.
In order to achieve the above purpose, the present invention adopts the technical scheme that:
a planetary wheel balanced torque impact-cutting composite drill bit comprises an outer joint, a turbine component, a planetary wheel component and a drill bit component which are sequentially connected from top to bottom;
the turbine assembly comprises a turbine sleeve, a turbine shaft, a turbine rotor and a turbine stator; the turbine rotor and the turbine stator are sleeved on the turbine shaft in a matched manner; the turbine sleeve is arranged on the outer surface of the turbine stator, and the upper end of the turbine sleeve is connected with the outer joint; a first flow passage is formed between the turbine rotor blades;
the planetary gear assembly comprises an inner transmission shaft, a planetary carrier top cover, a gear assembly, a planetary carrier chassis, an upper convex disc sleeve and a lower convex disc sleeve which are sequentially arranged on the inner transmission shaft from top to bottom; the inner transmission shaft is connected with the turbine shaft; the gear assembly comprises an inner gear ring, a planetary gear and an outer gear ring; the inner gear ring is matched with the outer surface of the inner transmission shaft; the inner surface of the outer tooth ring is meshed with the outer surface of the inner tooth ring through the planetary gear; the lower end of the upper cam sleeve is provided with upper cam teeth, the upper end of the lower cam sleeve is provided with lower cam teeth, and the upper cam teeth are matched with the lower cam teeth; the lower cam sleeve is matched with the outer surface of the inner transmission shaft and can axially slide along the inner transmission shaft; the inner transmission shaft is provided with a through second flow passage; the lower convex disc teeth are provided with a third through flow passage;
the drill bit assembly comprises an inner drill bit and an outer drill bit; the inner drill bit is arranged inside the outer drill bit and connected with the lower cam sleeve; the outer drill bit is connected with the outer tooth ring; an outer sleeve is arranged on the outer surface of the outer drill bit, and the upper end of the outer sleeve is connected with the top cover of the planet carrier; a through fourth flow passage is formed in the inner drill bit;
the first flow channel, the second flow channel, the third flow channel and the fourth flow channel form a drilling fluid flow channel.
As a preferred embodiment, a rotor baffle disc is arranged at one end of the turbine shaft far away from the inner transmission shaft; and a stator retainer ring is arranged on the inner wall of the turbine sleeve.
As a preferred embodiment, the turbine stator comprises a stator inner ring, a stator outer ring and stator blades; the turbine rotor comprises a rotor inner ring, a rotor outer ring and rotor blades; a turbine rotor and a turbine stator form a first-stage turbine, and the multi-stage turbines cooperate; and the rotor blades are arranged in mirror image with the stator blades.
As a preferred implementation mode, the inner transmission shaft is hollow, a through hole is formed in one end, connected with the turbine shaft, of the inner transmission shaft, a spline is arranged on the outer surface of the other end, a spline groove is formed in the inner surface of the lower convex disc sleeve, the spline groove is matched with the spline, and the size of the spline groove is larger than that of the spline; and a key groove is formed in the middle of the inner transmission shaft, and the inner gear ring is connected with the inner transmission shaft through a key.
As a preferred implementation scheme, a large deep groove ball bearing is arranged between the top cover of the planet carrier and the inner transmission shaft; a thrust ball bearing is arranged between the planet carrier top cover and the external tooth ring; a small deep groove ball bearing is arranged between the planet carrier chassis and the inner transmission shaft; the planet carrier top cover is connected with the planet carrier bottom plate through planet carrier screws, and the planet carrier screws penetrate through gaps between the inner gear ring and the outer gear ring to connect the planet carrier top cover with the planet carrier bottom plate.
As a preferred embodiment, the planet carrier top cover is provided with a first boss hole; the planet carrier chassis is provided with a second boss hole, and the first boss hole and the second boss hole are correspondingly arranged; the planetary gear is arranged between the inner gear ring and the outer gear ring through planetary gear screws; and two ends of the planet wheel screw are respectively matched with the first boss hole and the second boss hole.
As a preferred embodiment, a middle deep groove ball bearing is arranged between the inner drill bit and the inner wall of the outer drill bit; the outer surface of the inner drill bit is provided with a first step, the inner surface of the outer drill bit is provided with a second step, and the first step is matched with the second step; a sealing ring is arranged between the second step and the outer wall of the inner drill bit; and the inner drill bit is provided with a central hole and a jet hole, and the central hole and the jet hole form the fourth flow passage.
As a preferred embodiment, the tooth surfaces of the upper cam teeth and the lower cam teeth are oblique cam tooth surfaces, and the tooth surfaces of the upper cam teeth and the lower cam teeth are oblique cam tooth surfaces in the same oblique direction.
As a preferred embodiment, bearing washers are arranged between the large deep groove ball bearing and the inner gear ring, and between the outer gear ring and the small deep groove ball bearing.
The invention has the beneficial effects that:
1. according to the invention, through the structure of the planetary gear transmission inner and outer drill bits in the drilling process, coaxial synchronous reverse rotation of the inner drill bit and the outer drill bit can be realized, self-balancing of the torque of the drilling tool is realized, and transverse vibration and torsional vibration of the drilling tool in the drilling process are restrained, so that the stability and directional drilling capability of the drilling tool are improved.
2. The invention is connected between the power source and the inner drill bit through the upper convex disc sleeve and the lower convex disc sleeve, the drill bit can bear periodical axial impact load through the upper convex disc sleeve and the lower convex disc sleeve structure while torque is transmitted, and axial impact drilling is realized while the inner drill bit rotates and cuts, so that the drill bit uniformly and stably breaks rock, higher mechanical drilling speed can be obtained, the continuous drilling of a drilling tool can be ensured, and the drilling efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the inner and outer drill bit constructions of the present invention;
FIG. 3 is a schematic view of the turbine rotor and turbine stator mating of the present invention;
FIG. 4 is a schematic view of the flow of drilling fluid in the turbine assembly of the present invention;
FIG. 5 is a schematic view of the inner drive shaft of the present invention;
FIG. 6 is a schematic view of a gear assembly according to the present invention;
FIG. 7 is a schematic view of a top cover of a planet carrier according to the present invention;
FIG. 8 is a schematic diagram of a planet carrier chassis structure of the present invention;
FIG. 9 is a schematic view of an upper cam sleeve according to the present invention;
FIG. 10 is a schematic view of a lower cam sleeve according to the present invention;
FIG. 11 is a schematic diagram of the mating structure of the upper cam sleeve and the lower cam sleeve of the present invention;
FIG. 12 is an exploded view of a planetary gear assembly according to the present invention;
FIG. 13 is a schematic view of the overall structure of the present invention in its minimum extended position;
FIG. 14 is a schematic view of the overall structure of the present invention during extension of the inner drill bit;
FIG. 15 is a schematic view of the overall structure of the present invention in its maximum extended position.
In the figure: 1. an outer joint; 2. a turbine sleeve; 3. a turbine shaft; 4. a turbine rotor; 401. a rotor inner ring; 402. a rotor outer ring; 403. a rotor blade; 5. a turbine stator; 501. a stator inner ring; 502. a stator outer ring; 503. stator blades; 6. a first flow passage; 7. an inner drive shaft; 701. a through hole; 702. a spline; 703. a key slot; 8. a planet carrier top cover; 801. a first boss hole; 802. a countersunk hole; 9. an inner gear ring; 10. a planetary gear; 11. an outer toothed collar; 12. a planet carrier chassis; 1201. a screw blind hole; 1202. a second boss hole; 13. an upper cam sleeve; 1301. upper cam teeth; 14. a lower cam sleeve; 1401. lower cam teeth; 1402. spline grooves; 15. a second flow passage; 16. a third flow passage; 17. an inner drill bit; 1701. a first step; 18. an outer drill bit; 1801. a second step; 19. an outer sleeve; 20. a fourth flow passage; 2001. a central bore; 2002. jet holes; 21. a rotor baffle disc; 22. a stator retainer ring; 23. a large deep groove ball bearing; 24. thrust ball bearings; 25. a small deep groove ball bearing; 26. medium-deep groove ball bearings; 27. a bearing washer; 28. a planet carrier screw; 29. planetary screw.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
As shown in fig. 1-15, the present embodiment provides a planetary wheel balanced torque impact-cutting composite drill bit, which comprises an outer joint 1, a turbine assembly, a planetary wheel assembly and a drill bit assembly which are sequentially connected from top to bottom;
as shown in fig. 1, the turbine assembly includes a turbine sleeve 2, a turbine shaft 3, a turbine rotor 4, and a turbine stator 5; the turbine rotor 4 and the turbine stator 5 are sleeved on the turbine shaft 3 in a matched manner; the turbine sleeve 2 is arranged on the outer surface of the turbine stator 5, and the upper end of the turbine sleeve 2 is connected with the outer joint 1; the turbine rotor 4 blades and the turbine rotor 4 blades form a first flow passage 6 therebetween; preferably, the outer joint 1 is in threaded connection with the turbine sleeve 2, so that the installation and the disassembly are convenient; the inner wall of the turbine sleeve 2 is matched with the outer diameter of the turbine stator 5, so that the turbine stator 5 is installed, during operation, drilling fluid flows in from the cavity of the outer joint 1, and the turbine rotor 4 is driven to rotate through the first flow channel 6 so as to drive the turbine shaft 3 to rotate.
As shown in fig. 1, the planetary gear assembly comprises an inner transmission shaft 7, a planetary carrier top cover 8, a gear assembly, a planetary carrier chassis 12, an upper cam sleeve 13 and a lower cam sleeve 14 which are sequentially arranged on the inner transmission shaft 7 from top to bottom; the inner transmission shaft 7 is connected with the turbine shaft 3; the gear assembly comprises an inner gear ring 9, a planetary gear 10 and an outer gear ring 11; the inner gear ring 9 is matched with the outer surface of the inner transmission shaft 7; the inner surface of the outer tooth ring 11 is meshed with the outer surface of the inner tooth ring through the planetary gear 10; an upper cam tooth 1301 is arranged at the lower end of the upper cam sleeve 13, a lower cam tooth 1401 is arranged at the upper end of the lower cam sleeve 14, and the upper cam tooth 1301 is matched with the lower cam tooth 1401; the lower cam sleeve 14 is matched with the outer surface of the inner transmission shaft 7 and can axially slide along the inner transmission shaft 7; the inner transmission shaft 7 is provided with a through second flow passage 15; the lower cam teeth 1401 are provided with a third through flow channel 16; preferably, the upper end of the inner transmission shaft 7 is in threaded connection with the turbine shaft 3, and the upper end surface of the planet carrier top cover 8 is matched with the turbine sleeve 2 to form a cavity among the turbine sleeve 2, the turbine shaft 3 and the inner transmission shaft 7, so that the drilling fluid flowing out of the first flow passage 6 conveniently flows into the cavity and then flows into the second flow passage 15 in the inner transmission shaft 7; the inner gear ring 9 is matched with the inner transmission shaft 7 and meshed with the outer gear ring 11 through the planetary gear 10; during operation, the turbine shaft 3 rotates to drive the inner transmission shaft 7 to rotate, so as to drive the inner gear ring 9 to rotate in the same direction, and the outer gear ring 11 and the inner transmission shaft 7 are driven to realize synchronous and reverse rotation through the transmission of the planetary gears 10. It should be noted that the planet carrier top cover 8 and the planet carrier chassis 12 cannot rotate along with the rotation of the inner transmission shaft 7, the upper convex disc sleeve 13 is connected with the planet carrier chassis 12 through screws and kept still, and holes for installing screws are formed in the upper convex disc sleeve 13 and the planet carrier chassis 12; the lower cam sleeve 14 is matched with the lower part of the inner transmission shaft 7 and can axially slide along the inner transmission shaft 7; the inner transmission shaft 7 rotates to drive the lower cam sleeve 14 to rotate, and as the upper cam teeth 1301 are matched with the lower cam teeth 1401, when the lower cam sleeve 14 rotates, the tooth surface matching positions of the upper cam teeth and the lower cam sleeve 14 change, so that the lower cam sleeve 14 axially slides.
As shown in fig. 1, the drill bit assembly includes an inner drill bit 17 and an outer drill bit 18; the inner drill bit 17 is arranged inside the outer drill bit 18 and connected with the lower cam sleeve 14; the outer drill bit 18 is connected with the outer tooth ring 11; an outer sleeve 19 is arranged on the outer surface of the outer drill bit 18, and the upper end of the outer sleeve 19 is connected with the planet carrier top cover 8; the inner drill bit 17 is provided with a fourth through flow passage 20; preferably, the inner drill bit 17 is in threaded connection with the lower cam sleeve 14, and when the lower cam sleeve 14 axially slides, the inner drill bit 17 is driven to axially run, so that axial impact is realized; the outer drill bit 18 is in threaded connection with the outer tooth ring 11, the inner drill bit 17 and the outer drill bit 18 are driven by the lower cam sleeve 14 and the outer tooth ring 11 to realize synchronous reverse rotation respectively, so that self-balancing of torque of the drilling tool is realized, transverse vibration and torsional vibration of the drilling tool in the drilling process are restrained, and therefore stability and directional drilling capability of the drilling tool are improved. The power source is connected with the inner drill bit 17 through the upper cam sleeve 13 and the lower cam sleeve 14, the drill bit can bear periodical axial impact load through the upper cam sleeve 13 and the lower cam sleeve 14 when torque is transmitted, and axial impact drilling is realized when the inner drill bit 17 rotates and cuts, so that the drill bit uniformly and stably breaks rock, higher mechanical drilling speed can be obtained, continuous drilling of a drilling tool can be ensured, and drilling efficiency is improved.
As shown in fig. 1, the first flow channel 6, the second flow channel 15, the third flow channel 16 and the fourth flow channel 20 form a drilling fluid flow channel. The drilling fluid flows out from the first flow passage 6, the second flow passage 15, the third flow passage 16 and the fourth flow passage 20 in sequence.
Example 2
As shown in fig. 1-15, the present embodiment is developed on the basis of the foregoing embodiment, specifically, the present embodiment provides an impact-cutting composite drill bit with planetary gear balancing torque, as shown in fig. 1, one end of the turbine shaft 3 away from the inner transmission shaft 7 is provided with a rotor baffle disc 21; a stator collar 22 is provided on the inner wall of the turbine sleeve 2. Preferably, the inner wall of the turbine sleeve 2 is divided into two ends with different inner diameters, and one section with larger inner diameter is used for installing the stator retainer ring 22; the inner wall with smaller inner diameter is matched with the turbine stator 5, the upper end surface of the turbine stator 5 is contacted with the stator check ring 22, and the stator check ring 22 limits the installation of the turbine stator 5; the rotor baffle disc 21 is connected with the upper end of the turbine shaft 3 through threads and limits the turbine stator 5. The turbine shaft 3 is provided with a shaft shoulder, and the turbine rotor 4 and the turbine stator 5 are assembled between the rotor baffle disc 21 and the shaft shoulder.
As shown in fig. 3, as a preferred embodiment, the turbine stator 5 includes a stator inner ring 501, a stator outer ring 502, and stator blades 503; the turbine rotor 4 comprises a rotor inner ring 401, a rotor outer ring 402 and rotor blades 403; a turbine rotor 4 and a turbine stator 5 form a first-stage turbine, and a plurality of stages of turbines cooperate; and the rotor blades 403 are mirror images of the stator blades 503. The multistage turbine is in press fit through the end face, the multistage stator outer ring 502 and the turbine sleeve 2 are in fit and kept relatively static, and the multistage turbine rotor 4 is axially positioned through the rotor baffle disc 21 and the shaft shoulder of the turbine shaft 3 and rotates synchronously with the turbine shaft 3. The stator blades 503 and the rotor blades 403 are arranged in a mirror image mode, and the drilling fluid enters the turbine group, flows into the turbine rotor 4 after being depressurized and accelerated in the turbine stator 5, and pushes the turbine rotor 4 and the turbine shaft 3 to rotate for doing work.
As shown in fig. 5, as a preferred embodiment, the inner driving shaft 7 is hollow, a through hole 701 is formed at one end of the inner driving shaft 7 connected with the turbine shaft 3, a spline 702 is formed at the outer surface of the other end, a spline groove 1402 is formed at the inner surface of the lower cam sleeve 14, the spline groove 1402 is matched with the spline 702, and the size of the spline groove 1402 is larger than that of the spline 702; the middle part of the inner transmission shaft 7 is provided with a key groove 703, and the inner gear ring 9 is in key connection with the inner transmission shaft 7. It should be noted that the inner transmission shaft 7 is hollow, the upper end is provided with a through hole 701, and the drilling fluid flowing out through the first flow channel 6 flows into the inner transmission shaft 7 through the through hole 701, so as to realize the flow of the drilling fluid. Spline groove 1402 on lower cam sleeve 14 cooperates with spline 702 on inner drive shaft 7, and inner drive shaft 7 rotates to drive lower cam sleeve 14 to rotate through spline 702; further, the spline groove 1402 is larger than the spline 702, so that the lower cam sleeve 14 can slide axially, and the inner drill bit 17 is driven to slide axially, thereby realizing axial impact and improving drilling efficiency. The inner gear ring 9 is connected with the inner transmission shaft 7 in a key way, and the inner transmission shaft 7 drives the inner gear ring 9 to synchronously rotate.
As shown in fig. 12, as a preferred embodiment, a large deep groove ball bearing 23 is arranged between the planet carrier top cover 8 and the inner transmission shaft 7; a thrust ball bearing 24 is arranged between the planet carrier top cover 8 and the external tooth ring 11; a small deep groove ball bearing 25 is arranged between the planet carrier chassis 12 and the inner transmission shaft 7; the planet carrier top cover 8 is connected with the planet carrier chassis 12 by planet carrier screws 28, and the planet carrier screws 28 penetrate through gaps between the inner gear ring 9 and the outer gear ring 11 to connect the planet carrier top cover 8 with the planet carrier chassis 12. Preferably, the inner transmission shaft 7 is provided with a bearing limiting step for limiting the large deep groove ball bearing 23, so as to realize the installation of the top cover 8 of the planet carrier; the planet carrier top cover 8 is provided with countersunk holes 802 for mounting the planet carrier screws 28, and four countersunk holes 802 are preferably uniformly arranged in the circumferential direction; a blind screw hole 1201 corresponding to the countersunk hole 802 is formed in the planet carrier chassis 12; the position of the counter bore 802 is staggered from the installation position of the planet gear 10, so that the planet carrier screw 28 can pass through the gap between the annular gear 9 and the outer tooth ring 11; the planet carrier head 8 is held relatively fixed to the planet carrier base plate 12 by planet carrier screws 28; and the planet carrier top cover 8 cannot rotate along with the inner transmission shaft 7 through the large deep groove ball bearing 23, the thrust ball bearing 24 and the small deep groove ball bearing 25.
As shown in fig. 7 and 8, as a preferred embodiment, the top cover 8 of the planet carrier is provided with a first boss hole 801; a second boss hole 1202 is formed in the planet carrier chassis 12, and the first boss hole 801 is arranged corresponding to the second boss hole 1202; the planetary gear 10 is arranged between the inner gear ring 9 and the outer gear ring 11 through planetary gear screws 29; both ends of the planetary screw 29 are respectively engaged with the first boss hole 801 and the second boss hole 1202. The planetary gear screw 29 is fixed between a first boss hole 801 of the planetary carrier top cover 8 and a second boss hole 1202 of the planetary carrier chassis 12, a step is arranged at the left end of the external tooth ring 11 and matched with the thrust ball bearing 24, and an internal thread is arranged at the right end and matched with an external thread at the left end of the external drill bit 18, so that the external tooth ring and the external drill bit 18 coaxially rotate in the same direction; the large deep groove ball bearing 23 is positioned between the planet carrier top cover 8 and the step of the inner transmission shaft 7, the thrust ball bearing 24 is positioned between the planet carrier top cover 8 and the outer gear ring sleeve, the right end of the planet carrier top cover 8 is provided with an inner thread, and the thrust ball bearing is connected with the outer thread at the left end of the outer sleeve 19.
As shown in fig. 2, as a preferred embodiment, a middle deep groove ball bearing 26 is installed between the inner drill bit 17 and the inner wall of the outer drill bit 18; the outer surface of the inner drill bit 17 is provided with a first step 1701, the inner surface of the outer drill bit 18 is provided with a second step 1801, and the first step 1701 is matched with the second step 1801; a sealing ring is arranged between the second step 1801 and the outer wall of the inner drill bit 17; the inner drill 17 is provided with a central hole 2001 and a jet hole 2002, and the central hole 2001 and the jet hole 2002 form the fourth flow passage 20. The middle deep groove ball bearings 26 are arranged between the inner drill bit 17 and the outer drill bit 18, two middle deep groove ball bearings 26 are respectively arranged between the two middle deep groove ball bearings 26, and a bearing outer limit ring and a bearing inner limit ring are arranged. The first step 1701 and the second step 1801 cooperate to limit the inner drill bit 17, an annular groove is arranged on the inner wall surface of the outer drill bit 18 for installing a sealing ring, and the blade tooth arrangement directions of the inner drill bit 17 and the outer drill bit 18 are opposite and respectively adapt to the respective rotary cutting directions.
As shown in fig. 9-11, as a preferred embodiment, the flanks of the upper cam teeth 1301 and the lower cam teeth 1401 are both obliquely convex flanks, the flanks of which are inclined in the same direction. When the lower cam sleeve 14 and the upper cam sleeve 13 are only contacted by the cam teeth heads, the lower cam sleeve 14 drives the inner drill bit 17 to generate maximum axial displacement, at the moment, the inclined tooth surfaces of the upper cam and the lower cam are completely separated from the matching relationship, the inner drill bit 17 is driven to rapidly press back to the original position to finish axial impact after being acted by an external rock stratum, the periodic variation of the matching relationship of the cam teeth can realize periodic movement of the lower cam sleeve 14, so that the inner drill bit 17 is driven to realize axial movement to uniformly and stably crush rock, and the drilling tool can continuously drill and improve the drilling efficiency.
As shown in fig. 1, as a preferred embodiment, bearing washers 27 are provided between the large deep groove ball bearing 23 and the ring gear 9, and between the outer tooth ring 11 and the small deep groove ball bearing 25.
Example 3
As shown in fig. 1-15, the present embodiment is developed on the basis of the above embodiment, and specifically, the present embodiment provides a working procedure of an impact-cutting composite drill bit with planetary wheel balancing torque:
when the drilling tool works, the turbine rotor 4, the turbine shaft 3, the inner transmission shaft 7, the lower cam sleeve 14 and the inner drill bit 17 jointly form a rotating body I, the outer gear sleeve and the outer drill bit 18 form a rotating body II, the turbine stator 5, the turbine sleeve 2, the planet carrier top cover 8, the planet carrier chassis 12 and the upper cam sleeve 13 form a fixing piece, high-pressure drilling fluid enters the turbine assembly through the outer joint 1, flows into the turbine rotor 4 after being depressurized and accelerated in the turbine stator 5, pushes the rotating body I where the turbine rotor 4 is positioned to rotate along the cutting direction of the inner drill bit 17, the rotating body II rotates along the cutting direction of the outer drill bit 18 under the transmission of the planet gear 10, and the rotating directions of the rotating body I and the rotating body II are opposite, so that torque balance is realized in the whole drilling tool in the rock breaking drilling process, and transverse vibration and torsional vibration are further inhibited. When the lower cam sleeve 14 in the rotating body I rotates relative to the upper cam sleeve 13 in the fixed body, the lower cam sleeve 14 axially displaces due to the gradual separation of the oblique cam surfaces from the matching relationship; when the lower cam sleeve 14 and the upper cam sleeve 13 are only contacted by the cam teeth heads, the lower cam sleeve 14 drives the inner drill bit 17 to generate maximum axial displacement, at the moment, the inclined tooth surfaces of the upper cam and the lower cam are completely separated from the matching relationship, the inner drill bit 17 is driven to rapidly press back to the original position to finish axial impact after being acted by an external rock stratum, the axially-moving of the lower cam sleeve 14 can be realized through the change of the periodically-changed matching relationship of the cam, so that the axially-moving of the inner drill bit 17 is driven to realize axial impact, and the drill bit uniformly and stably breaks rock, so that the drilling tool can continuously drill, and the drilling efficiency is improved.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a compound drill bit of impact-cutting of planet wheel balanced torque which characterized in that: comprises an outer joint (1), a turbine component, a planet wheel component and a drill bit component which are sequentially connected from top to bottom;
the turbine assembly comprises a turbine sleeve (2), a turbine shaft (3), a turbine rotor (4) and a turbine stator (5); the turbine rotor (4) and the turbine stator (5) are sleeved on the turbine shaft (3) in a matching way; the turbine sleeve (2) is arranged on the outer surface of the turbine stator (5), and the upper end of the turbine sleeve (2) is connected with the outer joint (1); a first flow passage (6) is formed between the blades of the turbine rotor (4) and the blades of the turbine rotor (4);
the planetary gear assembly comprises an inner transmission shaft (7), a planetary carrier top cover (8), a gear assembly, a planetary carrier chassis (12), an upper convex disc sleeve (13) and a lower convex disc sleeve (14) which are sequentially arranged on the inner transmission shaft (7) from top to bottom; the inner transmission shaft (7) is connected with the turbine shaft (3); the gear assembly comprises an inner gear ring (9), a planetary gear (10) and an outer gear ring (11); the inner gear ring (9) is matched with the outer surface of the inner transmission shaft (7); the inner surface of the outer tooth ring (11) is meshed with the outer surface of the inner tooth ring through the planetary gear (10); an upper cam tooth (1301) is arranged at the lower end of the upper cam sleeve (13), a lower cam tooth (1401) is arranged at the upper end of the lower cam sleeve (14), and the upper cam tooth (1301) is matched with the lower cam tooth (1401); the lower cam sleeve (14) is matched with the outer surface of the inner transmission shaft (7) and can axially slide along the inner transmission shaft (7); the inner transmission shaft (7) is provided with a through second flow passage (15); the lower convex disc teeth (1401) are provided with a third through flow passage (16);
the drill bit assembly comprises an inner drill bit (17) and an outer drill bit (18); the inner drill bit (17) is arranged inside the outer drill bit (18) and is connected with the lower convex disc sleeve (14); the outer drill bit (18) is connected with the outer tooth ring (11); an outer sleeve (19) is arranged on the outer surface of the outer drill bit (18), and the upper end of the outer sleeve (19) is connected with the planet carrier top cover (8); the inner drill bit (17) is provided with a through fourth runner (20);
the first flow channel (6), the second flow channel (15), the third flow channel (16) and the fourth flow channel (20) form a drilling fluid flow channel.
2. The planetary balanced torque impact-cutting composite drill bit according to claim 1, wherein: a rotor baffle disc (21) is arranged at one end of the turbine shaft (3) far away from the inner transmission shaft (7); a stator retainer ring (22) is arranged on the inner wall of the turbine sleeve (2).
3. The planetary balanced torque impact-cutting composite drill bit according to claim 1, wherein: the turbine stator (5) comprises a stator inner ring (501), a stator outer ring (502) and stator blades (503); the turbine rotor (4) comprises a rotor inner ring (401), a rotor outer ring (402) and rotor blades (403); a turbine rotor (4) and a turbine stator (5) form a first-stage turbine, and the multi-stage turbines cooperate; and the rotor blades (403) are arranged in mirror image with the stator blades (503).
4. The planetary balanced torque impact-cutting composite drill bit according to claim 1, wherein: the inside of the inner transmission shaft (7) is hollow, a through hole (701) is formed in one end, connected with the turbine shaft (3), of the inner transmission shaft (7), a spline (702) is formed in the outer surface of the other end of the inner transmission shaft, a spline groove (1402) is formed in the inner surface of the lower cam sleeve (14), the spline groove (1402) is matched with the spline (702), and the size of the spline groove (1402) is larger than that of the spline (702); the middle part of the inner transmission shaft (7) is provided with a key groove (703), and the inner gear ring (9) is in key connection with the inner transmission shaft (7).
5. The planetary balanced torque impact-cutting composite drill bit according to claim 1, wherein: a large deep groove ball bearing (23) is arranged between the planet carrier top cover (8) and the inner transmission shaft (7); a thrust ball bearing (24) is arranged between the planet carrier top cover (8) and the external tooth ring (11); a small deep groove ball bearing (25) is arranged between the planet carrier chassis (12) and the inner transmission shaft (7); the planet carrier top cover (8) is connected with the planet carrier chassis (12) through planet carrier screws (28), and the planet carrier screws (28) penetrate through gaps between the inner gear ring (9) and the outer gear ring (11) to connect the planet carrier top cover (8) with the planet carrier chassis (12).
6. The planetary balanced torque impact-cutting composite drill bit according to claim 1, wherein: a first boss hole (801) is formed in the planet carrier top cover (8); a second boss hole (1202) is formed in the planet carrier chassis (12), and the first boss hole (801) and the second boss hole (1202) are correspondingly formed; the planetary gear (10) is arranged between the inner gear ring (9) and the outer gear ring (11) through planetary gear screws (29); two ends of the planet wheel screw (29) are respectively matched with the first boss hole (801) and the second boss hole (1202).
7. The planetary balanced torque impact-cutting composite drill bit according to claim 1, wherein: a middle deep groove ball bearing (26) is arranged between the inner drill bit (17) and the inner wall of the outer drill bit (18); the outer surface of the inner drill bit (17) is provided with a first step (1701), the inner surface of the outer drill bit (18) is provided with a second step (1801), and the first step (1701) is matched with the second step (1801); a sealing ring is arranged between the second step (1801) and the outer wall of the inner drill bit (17); the inner drill bit (17) is provided with a central hole (2001) and a jet hole (2002), and the central hole (2001) and the jet hole (2002) form the fourth flow passage (20).
8. The planetary balanced torque impact-cutting composite drill bit according to claim 1, wherein: the tooth surfaces of the upper convex disc tooth (1301) and the lower convex disc tooth (1401) are oblique convex tooth surfaces, and the tooth surfaces are in the same oblique direction.
9. The planetary balanced torque impact-cutting composite drill bit according to claim 5, wherein: bearing washers (27) are arranged between the large deep groove ball bearing (23) and the inner gear ring (9) and between the outer gear ring (11) and the small deep groove ball bearing (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311009218.9A CN117027660A (en) | 2023-08-11 | 2023-08-11 | Impact-cutting composite drill bit with planetary wheel balancing torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311009218.9A CN117027660A (en) | 2023-08-11 | 2023-08-11 | Impact-cutting composite drill bit with planetary wheel balancing torque |
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| Publication Number | Publication Date |
|---|---|
| CN117027660A true CN117027660A (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311009218.9A Pending CN117027660A (en) | 2023-08-11 | 2023-08-11 | Impact-cutting composite drill bit with planetary wheel balancing torque |
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| Country | Link |
|---|---|
| CN (1) | CN117027660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117514016A (en) * | 2024-01-03 | 2024-02-06 | 西南石油大学 | PDC drill bit with reversely-mounted teeth |
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2023
- 2023-08-11 CN CN202311009218.9A patent/CN117027660A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117514016A (en) * | 2024-01-03 | 2024-02-06 | 西南石油大学 | PDC drill bit with reversely-mounted teeth |
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