CN109469445B - Bidirectional resonance drilling speed-increasing tool - Google Patents
Bidirectional resonance drilling speed-increasing tool Download PDFInfo
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- CN109469445B CN109469445B CN201910043369.3A CN201910043369A CN109469445B CN 109469445 B CN109469445 B CN 109469445B CN 201910043369 A CN201910043369 A CN 201910043369A CN 109469445 B CN109469445 B CN 109469445B
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- 238000005553 drilling Methods 0.000 title claims abstract description 106
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 claims abstract description 56
- 230000001133 acceleration Effects 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 13
- 210000001503 joint Anatomy 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000036346 tooth eruption Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
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- General Life Sciences & Earth Sciences (AREA)
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- Earth Drilling (AREA)
Abstract
The invention relates to a bidirectional resonance drilling speed-up tool, which comprises a tool shell, wherein a driving shaft which is axially fixed and can circumferentially rotate is arranged in the tool shell, a drill bit seat which can circumferentially swing and axially slide is arranged below the driving shaft, first outer fan-shaped protrusions are arranged at the lower part of the side wall of the driving shaft, and first side through grooves which are radially communicated are arranged on each first outer fan-shaped protrusion; the inner wall of the drill bit seat is provided with first inner fan-shaped protrusions, second side through grooves which are radially communicated are formed in the first inner fan-shaped protrusions, second outer fan-shaped protrusions are formed in the outer wall of the drill bit seat, an axial cavity which can allow drilling fluid to intermittently drive the drill bit seat to axially slide is formed between every two adjacent first inner fan-shaped protrusions, and a torsion cavity which can allow the drilling fluid to intermittently drive the drill bit seat to circumferentially swing is formed between every two adjacent second outer fan-shaped protrusions. The tool increases the cutting depth of the PDC drill bit by applying bidirectional resonant load to the PDC drill bit, improves the mechanical drilling speed of soft and hard staggered strata, and has the characteristics of long service life and high reliability.
Description
Technical Field
The invention relates to the technical field of petroleum development, in particular to a bidirectional resonance drilling speed-up tool.
Background
With the development of the existing drilling technology, the situation that the drilling meets soft and hard staggered strata is more and more, and a PDC drill bit is generally adopted to drill in the stratum, but in the stratum, the PDC drill bit is easy to have tooth breakage, so that the service life is shortened, and the mechanical drilling speed is reduced.
In order to solve the problems, some scholars at home and abroad develop related impact drilling tools, such as a torsion impactor, a rotary percussion drilling tool and the like, and realize rapid rock breaking by adopting a mode of providing impact load for a PDC drill bit. From the use condition of the tool on site, the tool has a good use effect on hard stratum, but the use effect in soft and hard staggered stratum is not obvious. The analysis reason is that mainly in soft and hard staggered strata, impact load can be absorbed by the soft strata, so that elastic deformation of the rock is generated, and the rock is not broken enough. For soft and hard staggered formations, the resonant load is easier to increase the depth of the PDC drill bit cutting teeth into the rock, so that the mechanical drilling speed is increased.
In the drilling process of a horizontal well with soft and hard staggered strata, large frictional resistance between a drill string and a well wall is easy to occur at the position close to a drill bit, so that the bit pressure applied to the drill bit is small. In order to reduce the frictional resistance between the drill string and the well wall, some domestic and foreign scholars developed hydraulic oscillators to reduce the frictional force between the well wall and the drill string by applying an axially reciprocating vibration load to the drill string. At present, the hydraulic oscillator is used on a large scale on site, but the tool is generally not arranged near a drill bit, can not directly act on a PDC drill bit, and can not reduce the problem of large friction resistance near the drill bit.
Therefore, the inventor provides a bidirectional resonant drilling acceleration tool by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.
Disclosure of Invention
The invention aims to provide a bidirectional resonance drilling speed-up tool, which solves the problems of high friction resistance, low mechanical drilling speed and the like at the position close to a bit in the prior art.
The invention aims to realize the bidirectional resonant drilling speed-up tool, which comprises a tool shell with a hollow interior, wherein a hollow driving shaft which is axially fixed and can circumferentially rotate is arranged in the tool shell, a hollow drill bit seat which can circumferentially swing and axially slide is arranged below the driving shaft, first outer fan-shaped protrusions are symmetrically arranged at the lower part of the side wall of the driving shaft along the circumferential direction at intervals and in the radial direction, the outer wall of each first outer fan-shaped protrusion can be abutted and contacted with the inner wall of the drill bit seat, and a first side through groove which penetrates in the radial direction is arranged on each first outer fan-shaped protrusion; inner wall upper portion of drill bit seat sets up first drill bit seat step portion, the outer wall upper portion of drill bit seat sets up second drill bit seat step portion, certainly first drill bit seat step portion upwards along circumference interval and radial symmetry set up first interior fan-shaped protruding, each set up radial second side that link up on the first interior fan-shaped protruding and lead to the groove, certainly second drill bit seat step portion upwards and with first interior fan-shaped protruding circumference crisscross second outer fan-shaped protruding that sets up, each the outer wall of second outer fan-shaped protruding can with the inner wall of tool housing supports and leans on, adjacent two constitute between the first interior fan-shaped protruding and allow drilling fluid intermittent type drive drill bit seat endwise slip's axial cavity, adjacent two constitute between the second outer fan-shaped protruding and allow intermittent type drive drill bit seat circumferential direction wobbling twist reverse cavity.
In a preferred embodiment of the present invention, a third drill seat step portion with a reduced diameter is disposed below the first drill seat step portion on the inner wall of the drill seat, a reversing sleeve is sleeved on the upper portion of the inner wall of the drill seat, the upper portion of the outer wall of the reversing sleeve abuts against the inner wall of the tool housing, the bottom end of the reversing sleeve abuts against the third drill seat step portion, the outer wall of the first outer sector-shaped protrusion abuts against the inner wall of the reversing sleeve in a rotating manner, a third side through groove capable of communicating the first side through groove with the axial cavity is disposed on the side wall of the reversing sleeve, a fourth side through groove is disposed on the side wall of the reversing sleeve in a staggered manner with the third side through groove, and the fourth side through groove can communicate with the torsion cavity through the second side through groove.
In a preferred embodiment of the invention, a drilling fluid annulus flow channel is formed between the outer wall of the upper part of the driving shaft and the inner wall of the tool shell at a radial interval, a first drilling fluid channel which is axially through is arranged on the driving shaft, a second drilling fluid channel is formed by the first side through groove and a gap between two adjacent first outer fan-shaped protrusions, and a throttling channel which can control the flow of drilling fluid entering the inner cavity of the drill bit seat is arranged at the bottom of the reversing sleeve; the first drilling fluid passages are in staggered communication with the axial cavities or the torsional cavities.
In a preferred embodiment of the present invention, a plug is disposed at a bottom of the reversing sleeve, plug through holes are circumferentially disposed on the plug at intervals, and each plug through hole constitutes the throttling channel.
In a preferred embodiment of the present invention, the tool housing includes a hollow upper joint, a hollow middle joint, and a hollow lower joint, which are sequentially connected from top to bottom, the lower portion of the inner wall of the middle joint is provided with a second step portion with a reduced diameter, a spline groove is arranged upward from the bottom surface of the second step portion, the outer wall of the drill bit seat is provided with a spline which can circumferentially swing and axially slide in the spline groove, the lower joint is sealingly inserted into the middle joint, the top surface of the spline groove forms an upper limit surface of the spline, and the top surface of the lower joint forms a lower limit surface of the spline; the lower part of the side wall of the drill bit seat is in sealed sliding abutting contact with the inner wall of the lower joint.
In a preferred embodiment of the present invention, a first step portion with a reduced diameter is disposed on an inner wall of the tool housing, the first step portion constitutes a packing portion capable of axially packing the drilling fluid annulus flow passage, a sidewall through hole capable of communicating the drilling fluid annulus flow passage with the first drilling fluid passage is disposed on a sidewall of the driving shaft above the packing portion, and each of the first outer fan-shaped protrusions is disposed below the packing portion.
In a preferred embodiment of the invention, a turbine structure capable of driving the driving shaft to rotate is arranged on the drilling fluid annulus flow passage above the packer part, and the side wall through hole is arranged on the side wall of the driving shaft below the turbine structure.
In a preferred embodiment of the present invention, the turbine structure includes a rotor structure fixedly sleeved on the driving shaft, and the turbine structure further includes a stator structure sleeved on an inner wall of the tool housing.
In a preferred embodiment of the present invention, an axially fixable thrust bearing is sleeved on the driving shaft at a position close to the packing portion, an outer ring of the thrust bearing is fixedly sleeved on an inner wall of the tool housing, axially fixable centering bearings are respectively sleeved on the driving shaft at positions at two ends of the turbine structure, and outer rings of the centering bearings are fixedly sleeved on the inner wall of the tool housing.
In a preferred embodiment of the present invention, the sidewall through hole is disposed from outside to inside in an obliquely downward manner, and a top of the sidewall through hole is disposed higher than the thrust bearing.
From the above, the bidirectional resonant drilling acceleration tool provided by the invention has the following beneficial effects:
in the bidirectional resonant drilling speed-up tool provided by the invention, the drilling fluid is used as a driving medium, the drilling fluid intermittently and alternately enters the axial cavity or the torsion cavity to drive the bit seat to move axially or circumferentially, and axial or circumferential pulsating loads with the same frequency are generated on the bit and directly act on the PDC bit, so that the motion state of the bit is improved, the rigidity of the bit is increased, the depth of cutting teeth of the PDC bit, which are cut into rock, is increased, the frictional resistance between a drill string and a well wall at the position close to the bit is reduced, the cutting torque of the PDC bit is increased, the crushing efficiency of soft and hard staggered formation rock is improved, the mechanical drilling speed is improved, the service life of the PDC bit is prolonged, and the drilling cost is reduced; in the bidirectional resonance drilling speed-up tool, the frequency of the bidirectional resonance drilling speed-up tool is adjusted by adjusting the number and the shape of the turbine blades of the turbine structure, so that the operation is convenient; the bidirectional resonant drilling speed-up tool is simple in structure, free of any rubber component, convenient to use and high in reliability.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: is a schematic diagram of the bi-directional resonant drilling acceleration tool of the present invention.
FIG. 2: is a schematic structural diagram of the drill bit seat of the present invention.
FIG. 3: is a cross-sectional view taken at a-a in fig. 1, illustrating the torsional pulsating load generated by the present invention.
FIG. 4: the cross-sectional view at a-a in fig. 1 is a view of the present invention generating axial pulsating loads.
In the figure:
100. a bidirectional resonant drilling acceleration tool;
101. an axial cavity; 102. twisting the cavity;
1. a tool housing;
11. an upper joint; 12. a middle joint; 121. a spline groove; 13. a lower joint; 14. a first step portion; 15. a positioning sleeve; 151. a positioning sleeve step part;
2. a drive shaft;
21. a first outer sector-shaped protrusion; 211. a first side through groove;
22. a sidewall via;
23. a third step portion;
3. a bit seat;
31. a first bit seat step;
32. a second bit seat step;
33. a first inner sector-shaped protrusion; 331. a second side through groove;
34. a second outer sector-shaped protrusion;
35. a third bit seat step;
36. a spline;
4. a reversing sleeve;
41. a third side through groove; 42. a fourth side through groove; 43. a plug; 431. a plug through hole;
5. a turbine structure;
51. a rotor structure; 52. a stator structure; 53. a thrust bearing; 54. righting the bearing; 55. and positioning the nut.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
1-4, the invention provides a bidirectional resonant drilling acceleration tool 100, which comprises a tool housing 1 with a hollow interior, wherein the top of the tool housing 1 is connected with a downhole power tool or a drill collar; a hollow driving shaft 2 which is axially fixed and can circumferentially rotate is arranged in the tool shell 1, a hollow drill bit seat 3 which can circumferentially swing and axially slide is arranged below the driving shaft 2, a drill bit (in the prior art, not shown in the figure) is connected to the bottom of the drill bit seat 3, first outer fan-shaped protrusions 21 are symmetrically arranged on the lower portion of the side wall of the driving shaft 2 along the circumferential direction at intervals and in the radial direction, the outer wall of each first outer fan-shaped protrusion 21 can be abutted and contacted with the inner wall of the drill bit seat 3, a first side through groove 211 which penetrates through in the radial direction is arranged on each first outer fan-shaped protrusion 21, and in the embodiment, a pair of first outer fan-shaped protrusions 21 is symmetrically arranged on the lower portion of the; inner wall upper portion of drill bit seat 3 sets up first drill bit seat step portion 31, the outer wall upper portion of drill bit seat 3 sets up second drill bit seat step portion 32, upwards set up first interior fan-shaped protruding 33 along circumference interval and radial symmetry from first drill bit seat step portion 31, set up radial second side that link up on each first interior fan-shaped protruding 33 and pass through groove 331, upward and with first interior fan-shaped protruding 33 circumference crisscross second outer fan-shaped protruding 34 that sets up from second drill bit seat step portion 32, the outer wall of each second outer fan-shaped protruding 34 can support with tool housing 1's inner wall and lean on, in this embodiment, first interior fan-shaped protruding 33 and second outer fan-shaped protruding 34 are two that radial symmetry set up, and second outer fan-shaped protruding 34 is close to the clockwise one side setting of first interior fan-shaped protruding 33. An axial cavity 101 capable of allowing drilling fluid to intermittently drive the drill bit seat 3 to axially slide is formed between every two adjacent first inner fan-shaped protrusions 33, and a torsion cavity 102 capable of allowing drilling fluid to intermittently drive the drill bit seat 3 to circumferentially swing is formed between every two adjacent second outer fan-shaped protrusions 34.
In the bidirectional resonant drilling speed-increasing tool provided by the invention, the drilling fluid is used as a driving medium, intermittently and alternately enters the axial cavity or the torsional cavity to drive the bit seat to move axially or circumferentially, and axial or circumferential pulsating loads with the same frequency are generated on the bit and directly act on the PDC bit, so that the motion state of the bit is improved, the rigidity of the bit is increased, the depth of cutting teeth of the PDC bit, which are cut into rock, is increased, the frictional resistance between a drill string and a well wall at the position close to the bit is reduced, the cutting torque of the PDC bit is increased, the crushing efficiency of soft and hard staggered formation rock is improved, the mechanical drilling speed is increased, the service life of the PDC bit is prolonged, and the drilling cost is reduced.
Further, as shown in fig. 1, 3, and 4, a third drill seat step portion 35 with a reduced diameter is disposed below the first drill seat step portion 31 on the inner wall of the drill seat 3, a reversing sleeve 4 is sleeved on the upper portion of the inner wall of the drill seat 3, the upper portion of the outer wall of the reversing sleeve 4 abuts against the inner wall of the tool housing 1, the bottom end of the reversing sleeve 4 abuts against the third drill seat step portion 35, the outer wall of the first outer sector-shaped protrusion 21 rotatably abuts against the inner wall of the reversing sleeve 4, a third through groove 41 capable of communicating the first side through groove 211 with the axial cavity 101 is disposed on the side wall of the reversing sleeve 4, fourth through grooves 42 are disposed on the side wall of the reversing sleeve 4 and staggered with the third through groove 41, and the fourth through grooves 42 can communicate with the torsion cavity 102 through the second side through grooves 331.
Further, a drilling fluid annulus flow channel is formed between the outer wall of the upper portion of the driving shaft 2 and the inner wall of the tool shell 1 at a radial interval, a first drilling fluid channel which is axially communicated is arranged on the driving shaft 2, a second drilling fluid channel is formed by a gap between the first side through groove 211 and two adjacent first outer fan-shaped protrusions 21, and a throttling channel which can control the flow of drilling fluid entering the inner cavity of the drill bit seat 3 is arranged at the bottom of the reversing sleeve 4; the first drilling fluid passage communicates alternately with the axial cavities 101 or the torsional cavities 102.
Further, as shown in fig. 1, a plug 43 is provided at the bottom of the reversing sleeve 4, plug through holes 431 are provided in the plug 43 at intervals in the circumferential direction, and each plug through hole 431 constitutes a throttle passage.
Further, as shown in fig. 1 and 2, the tool housing 1 includes a hollow upper joint 11, a hollow middle joint 12, and a hollow lower joint 13, which are sequentially connected from top to bottom, the lower portion of the inner wall of the middle joint 12 is provided with a second step portion whose diameter is reduced, a spline groove 121 is upwardly provided from the bottom surface of the second step portion, the outer wall of the drill bit seat 3 is provided with a spline 36 which can circumferentially swing and axially slide in the spline groove, the lower joint 13 is sealingly inserted into the middle joint 12, the top surface of the spline groove 121 forms an upper limit surface of the spline, and the top surface of the lower joint 13 forms a lower limit surface of the spline; the lower part of the side wall of the drill bit seat 3 is in sealing sliding contact with the inner wall of the lower joint 13.
Further, as shown in fig. 1, a first step portion 14 with a diameter which is reduced is arranged on the inner wall of the tool housing 1, the first step portion 14 forms a packing portion which can axially pack a drilling fluid annulus flow channel, a side wall through hole 22 which can communicate the drilling fluid annulus flow channel with a first drilling fluid channel is arranged on the side wall of the driving shaft 2 above the packing portion, and each first outer fan-shaped protrusion 21 is arranged below the packing portion.
Further, as shown in fig. 1, a turbine structure 5 capable of driving the driving shaft 2 to rotate is arranged at a position above the packer in the drilling fluid annulus flow passage, and the sidewall through hole 22 is arranged on the sidewall of the driving shaft 2 below the turbine structure 5. The frequency of the bi-directional resonant drilling acceleration tool 100 can be adjusted by adjusting the number and shape of the turbine blades.
Further, as shown in fig. 1, the turbine structure 5 includes a rotor structure 51 fixedly sleeved on the driving shaft 2, and the turbine structure 5 further includes a stator structure 52 sleeved on the inner wall of the tool housing 1.
Further, as shown in fig. 1, a thrust bearing 53 capable of being axially fixed is sleeved on a position of the driving shaft 2 close to the packing portion, an outer ring of the thrust bearing 53 is fixedly sleeved on an inner wall of the tool housing 1, a centering bearing 54 capable of being axially fixed is respectively sleeved on positions of the driving shaft 2 at two ends of the turbine structure 5, and an outer ring of the centering bearing 54 is fixedly sleeved on the inner wall of the tool housing 1.
Further, as shown in fig. 1, a third step portion 23 with an increased diameter is disposed on the sidewall of the driving shaft 2 above the first step portion 14, the bottom of the outer ring of the thrust bearing 53 axially abuts against the top surface of the first step portion 14, and the bottom of the inner ring of the thrust bearing 53 axially abuts against the top surface of the third step portion 23; the tool shell 1 is internally sleeved with a positioning sleeve 15, a positioning sleeve step part 151 capable of pushing against the outer ring of the thrust bearing 53 from the top end is arranged on the positioning sleeve 15, the top surface of the positioning sleeve 15 is axially pushed against the bottom of the outer ring of the centering bearing 54 at the bottom end of the turbine structure, and the top of the outer ring of the centering bearing 54 at the bottom end of the turbine structure is axially pushed against the bottom surface of the turbine structure 5; the centering bearing 54 at the top end of the turbine structure is axially fixed by a positioning nut 55 which is sleeved on the drive shaft 2.
As shown in fig. 1, in the present embodiment, in order to facilitate the flow of drilling fluid from the drilling fluid annulus flow passage into the first drilling fluid passage, the sidewall through holes 22 are disposed diagonally downward from outside to inside, and the top of the sidewall through holes 22 is disposed higher than the thrust bearing 53.
When the bidirectional resonant drilling acceleration tool 100 of the invention is used for drilling, the upper joint 11 is connected to a drill collar (or a downhole power tool), and a drill bit is connected into a drill bit seat 3. High-pressure drilling fluid is injected into the tool shell 1 of the bidirectional resonant drilling acceleration tool 100 through the drill collar, and part of the drilling fluid flows downwards to a drill bit through the first drilling fluid channel, the inner cavity of the reversing sleeve 4, the plug through hole 431 and the inner cavity of the drill bit seat 3; the other part of the drilling fluid flows into the drilling fluid annulus flow channel, the turbine structure 5 is driven to rotate and the driving shaft 2 is driven to rotate, and the drilling fluid passing through the turbine structure 5 is converged into the first drilling fluid channel through the side wall through hole 22 on the driving shaft 2;
when the drilling fluid passes through the turbine structure 5, the drilling fluid pushes the turbine structure 5 to rotate clockwise (the rotation direction can be adjusted according to actual conditions, and is not limited to clockwise rotation), and drives the driving shaft 2 to rotate clockwise. The driving shaft 2 rotates continuously, so that the circumferential position of the first outer fan-shaped protrusion 21 at the lower end of the driving shaft changes continuously, and the circumferential position of the first side through groove 211 changes accordingly, so that the high-pressure drilling fluid in the driving shaft 2 flows into the corresponding cavity through the corresponding through groove.
As shown in fig. 3, when the first side through groove 211 is communicated with the torsion cavity 102 through the fourth side through groove 42 and the second side through groove 331, part of the high-pressure drilling fluid in the first drilling fluid channel flows into the torsion cavity 102 to drive the drill bit seat 3 to rotate clockwise, so as to form a torsion pulsating load; with the rotation of the driving shaft 2, the first side through groove 211 is staggered with the torsion chamber 102, and the drill bit seat 3 returns to the position before clockwise rotation due to the action of the driving torque transmitted by the drill rod to the middle joint 12 through the drill collar.
As shown in fig. 4, when the first side through slot 211 is communicated with the axial cavity 101 through the third side through slot 41, part of the high-pressure drilling fluid in the first drilling fluid channel flows into the axial cavity 101, and drives the drill bit seat 3 to move downward, so as to form an axial pulsating load; with the rotation of the drive shaft 2, the first side through-slot 211 is offset from the axial cavity 101, and the bit seat 3 returns upward to the position before the downward movement under the action of the bit weight.
From the above, the bidirectional resonant drilling acceleration tool provided by the invention has the following beneficial effects:
in the bidirectional resonant drilling speed-up tool provided by the invention, the drilling fluid is used as a driving medium, the drilling fluid intermittently and alternately enters the axial cavity or the torsion cavity to drive the bit seat to move axially or circumferentially, and axial or circumferential pulsating loads with the same frequency are generated on the bit and directly act on the PDC bit, so that the motion state of the bit is improved, the rigidity of the bit is increased, the depth of cutting teeth of the PDC bit, which are cut into rock, is increased, the frictional resistance between a drill string and a well wall at the position close to the bit is reduced, the cutting torque of the PDC bit is increased, the crushing efficiency of soft and hard staggered formation rock is improved, the mechanical drilling speed is improved, the service life of the PDC bit is prolonged, and the drilling cost is reduced; in the bidirectional resonance drilling speed-up tool, the frequency of the bidirectional resonance drilling speed-up tool is adjusted by adjusting the number and the shape of the turbine blades of the turbine structure, so that the operation is convenient; the bidirectional resonant drilling speed-up tool is simple in structure, free of any rubber component, convenient to use and high in reliability.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (9)
1. A bidirectional resonance drilling speed-up tool comprises a tool shell with a hollow interior, wherein a hollow driving shaft which is axially fixed and can circumferentially rotate is arranged in the tool shell, and the bidirectional resonance drilling speed-up tool is characterized in that a hollow drill bit seat which can circumferentially swing and axially slide is arranged below the driving shaft, first outer fan-shaped protrusions are circumferentially spaced and radially and symmetrically arranged on the lower portion of the side wall of the driving shaft, and a first side through groove which radially penetrates is formed in each first outer fan-shaped protrusion; the upper part of the inner wall of the drill bit seat is provided with a first drill bit seat step part, the upper part of the outer wall of the drill bit seat is provided with a second drill bit seat step part, first inner fan-shaped protrusions are arranged upwards from the first drill bit seat step part along the circumferential direction at intervals and in radial symmetry, a second side through groove which is radially communicated is arranged on each first inner fan-shaped protrusion, second outer fan-shaped protrusions are arranged upwards from the second drill bit seat step part and circumferentially staggered with the first inner fan-shaped protrusions, the outer wall of each second outer fan-shaped protrusion can be abutted against the inner wall of the tool shell, an axial cavity which can allow drilling fluid to intermittently drive the drill bit seat to slide axially is formed between every two adjacent first inner fan-shaped protrusions, and a torsion cavity which can allow the drilling fluid to intermittently drive the drill bit seat to swing circumferentially is formed between every two adjacent second outer fan;
the inner wall of the drill bit seat is positioned below the first drill bit seat step part and is provided with a third drill bit seat step part with the diameter being reduced, the reversing sleeve is sleeved on the upper part of the inner wall of the drill bit seat, the upper part of the outer wall of the reversing sleeve abuts against the inner wall of the tool shell, the bottom end of the reversing sleeve abuts against the third drill bit seat step part, the outer wall of the first outer fan-shaped protrusion rotatably abuts against the inner wall of the reversing sleeve, a third side through groove capable of communicating the first side through groove with the axial cavity is arranged on the side wall of the reversing sleeve, a fourth side through groove is arranged on the side wall of the reversing sleeve and the third side through groove in a staggered mode, and the fourth side through groove can be communicated with the torsion cavity through the second side through groove.
2. The bidirectional resonant drilling acceleration tool of claim 1, characterized in that a drilling fluid annulus flow passage is formed between the outer wall of the upper part of the driving shaft and the inner wall of the tool shell at a radial interval, a first drilling fluid passage which is axially communicated is arranged on the driving shaft, a second drilling fluid passage is formed by the first side through groove and the gap between two adjacent first outer fan-shaped protrusions, and a throttling passage which can control the flow of the drilling fluid entering the inner cavity of the drill bit seat is arranged at the bottom of the reversing sleeve; the first drilling fluid passages are in staggered communication with the axial cavities or the torsional cavities.
3. The bidirectional resonant drilling acceleration tool of claim 2, characterized in that a plug is arranged at the bottom of the reversing sleeve, plug through holes are arranged on the plug at intervals along the circumferential direction, and each plug through hole forms the throttling channel.
4. The bidirectional resonant drilling speed-increasing tool as recited in claim 2, wherein said tool housing comprises a hollow upper joint, a hollow middle joint and a hollow lower joint which are sequentially connected from top to bottom, a second step part with a reduced diameter is arranged at the lower part of the inner wall of the middle joint, a spline groove is arranged upwards from the bottom surface of the second step part, a spline which can circumferentially swing and can axially slide in the spline groove is arranged on the outer wall of the drill bit seat, the lower joint is hermetically arranged in the middle joint in a penetrating manner, the top surface of the spline groove forms the upper limiting surface of the spline, and the top surface of the lower joint forms the lower limiting surface of the spline; the lower part of the side wall of the drill bit seat is in sealed sliding abutting contact with the inner wall of the lower joint.
5. The bi-directional resonant drilling acceleration tool of claim 2, characterized in that the inner wall of the tool housing is provided with a first step portion with a decreasing diameter, the first step portion constitutes a packing portion capable of axially packing the drilling fluid annulus flow passage, the side wall of the drive shaft is provided with a side wall through hole capable of communicating the drilling fluid annulus flow passage and the first drilling fluid passage above the packing portion, and each first outer sector-shaped protrusion is located below the packing portion.
6. The bi-directional resonant drilling acceleration tool of claim 5, characterized in that the drilling fluid annulus flow path is provided with a turbine structure above the packer section for driving the drive shaft to rotate, and the sidewall through hole is provided in the sidewall of the drive shaft below the turbine structure.
7. The bi-directional resonant drilling acceleration tool of claim 6, characterized in that the turbine structure comprises a rotor structure fixed to the drive shaft and a stator structure fixed to the inner wall of the tool housing.
8. The bidirectional resonant drilling acceleration tool of claim 7, characterized in that an axial fixable thrust bearing is sleeved on the driving shaft near the packer, the outer ring of the thrust bearing is fixedly sleeved on the inner wall of the tool housing, an axial fixable centering bearing is respectively sleeved on the driving shaft at the two ends of the turbine structure, and the outer ring of the centering bearing is fixedly sleeved on the inner wall of the tool housing.
9. The bi-directional resonant drilling acceleration tool of claim 8, characterized in that the sidewall through hole is arranged diagonally downwards from outside to inside, and the top of the sidewall through hole is arranged higher than the thrust bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910043369.3A CN109469445B (en) | 2019-01-17 | 2019-01-17 | Bidirectional resonance drilling speed-increasing tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN110607988B (en) * | 2019-10-17 | 2021-01-12 | 中国石油集团渤海钻探工程有限公司 | Drilling speed increasing device for deep well hard formation |
| CN111323358B (en) * | 2020-04-14 | 2022-10-14 | 中国石油天然气集团有限公司 | Full-diameter shale core bedding seam drainage holder |
| CN114215477B (en) * | 2021-12-16 | 2023-06-06 | 中国石油天然气股份有限公司 | Bi-directional rotary drilling multi-branch fish bone completion production increasing tool |
| CN116220558B (en) * | 2023-05-08 | 2023-08-08 | 青岛科技大学 | Vibration reduction type speed increasing tool for petroleum drilling |
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| CN108412420A (en) * | 2018-05-17 | 2018-08-17 | 北京工业大学 | Pulsating composite impact device |
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| CN108915583A (en) * | 2018-06-25 | 2018-11-30 | 北京工业大学 | Mechanical composite impact drilling speed tool |
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| CN108625769A (en) * | 2018-03-27 | 2018-10-09 | 北京工业大学 | Torsional pulse drilling speed tool |
| CN108412420A (en) * | 2018-05-17 | 2018-08-17 | 北京工业大学 | Pulsating composite impact device |
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