CN211342775U

CN211342775U - Drilling tool capable of generating periodic circumferential and axial vibration to drill bit

Info

Publication number: CN211342775U
Application number: CN202020078835.XU
Authority: CN
Inventors: 徐少俊; 肖睿
Original assignee: CHENGDU BEST DIAMOND BIT CO LTD
Current assignee: CHENGDU BEST DIAMOND BIT CO LTD
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-08-25
Anticipated expiration: 2030-01-15

Abstract

The utility model discloses a can produce periodic circumference and axial vibration's drilling tool to the drill bit, including the drilling tool body, the top connection, the cap is pressed in the water conservancy diversion of lower clutch and installing in the central through hole of drilling tool body, first pivot, the turbine, the valve plate, the second pivot, the cap is pressed in the impact, foraminiferous sleeve, strike the sleeve, drive the valve, jump bit and nozzle, the lower extreme of lower clutch and drilling tool body is connected through being used for making between lower clutch and the drilling tool body the non-fixed connecting device who has microspur removal space when having transmission function, the integration is the rotary transmission structure to the effective equipment of multicomponent, circumference vibrating structure and axial vibration structure. The utility model discloses under the functional prerequisite that does not influence the rotary power transmission with the drilling rod for the drill bit, form periodic circumference vibration and axial vibration to the drill bit, effectively reduced "glue-smooth effect" that the circumference nonstandard vibration produced, improved drilling speed, efficiency and well quality, protected the drill bit, prolonged the drill bit life-span.

Description

Drilling tool capable of generating periodic circumferential and axial vibration to drill bit

Technical Field

The utility model relates to an auxiliary drilling tool for being connected with the drill bit especially relates to one kind and can produce periodic circumference and axial vibration's drilling tool to the drill bit.

Background

With the development of the oil drilling industry, the importance of drilling speed increase is increasingly presented. In the actual drilling process, an ideal drilling state does not exist, and the movement of the drill bit is disordered and disorderly. Downhole vibrations include lateral, longitudinal and torsional vibrations and combinations thereof, and downhole irregular undesirable vibrations can damage the drill bit cutting teeth, resulting in reduced bit life; on the other hand, in hard and plastic strata, the drill bit cutting teeth can not effectively bite into the strata when normal drilling pressure is adopted, and the cutting teeth can be broken and damaged when too high drilling pressure is adopted.

In conclusion, the conventional drill bit drills into the stratum by driving the drill rod to rotate, and because the vibration direction and the frequency of the drill bit are not restricted, the vibration direction and the frequency of the drill bit are disordered, so that the stratum is difficult to drill and low in efficiency on one hand, and on the other hand, the cutting teeth of the drill bit are easy to damage, and the service life of the drill bit is shortened.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a drill capable of generating periodic circumferential and axial vibrations to a drill bit in order to solve the above-mentioned problems.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a drilling tool capable of generating periodic circumferential and axial vibration to a drill bit comprises a casing-shaped drilling tool body, an upper joint and a lower joint, wherein the upper joint is used for being connected with a drill rod, the lower joint is used for being connected with the drill bit, the upper joint and the lower joint are respectively connected with the upper end and the lower end of the drilling tool body, the upper joint and the lower joint are respectively provided with a vertical central through hole, the lower joint is connected with the lower end of the drilling tool body through a non-fixed connecting device, and the non-fixed connecting device enables a micro-distance moving space to be formed between the lower joint and the drilling tool body while having a transmission function; the drilling tool further comprises a diversion pressure cap, a first rotating shaft, a turbine, a flow distribution disc, a second rotating shaft, an impact pressure cap, a sleeve with holes, an impact sleeve, a driving valve, an impact hammer and a nozzle which are arranged in the central through hole of the drilling tool body, the diversion pressure cap is fixedly connected with the drilling tool body, the upper end of the diversion pressure cap is close to the upper joint, a vertical pressure cap diversion through hole is arranged at a position on the diversion pressure cap, which is close to the outer wall, the upper end of the pressure cap diversion through hole is communicated with the lower end of the vertical central through hole of the upper joint, the upper end of the first rotating shaft is connected with the diversion pressure cap and can rotate freely, a flow gap is reserved between the outer wall of the first rotating shaft and the inner wall of the drilling tool body, the upper end of the flow gap is correspondingly communicated with the lower end of the pressure cap diversion through hole, the turbine is arranged in the flow gap, and the, the rotor of the turbine is connected with the outer wall of the first rotating shaft, the lower end of the first rotating shaft is connected with the flow distribution disc and can rotate freely, the flow distribution disc is fixedly connected with the drilling tool body, a vertical flow distribution disc flow guide through hole is formed in the position, close to the outer wall, of the flow distribution disc, the upper end of the flow distribution disc flow guide through hole is correspondingly communicated with the lower end of the flow passing gap, the upper end of the second rotating shaft is fixedly connected with the lower end of the first rotating shaft, a vertical central through hole is formed in the second rotating shaft, a flow distribution gap is reserved between the outer wall of the second rotating shaft and the inner wall of the drilling tool body, the upper end of the flow distribution gap is correspondingly communicated with the lower end of the flow distribution disc flow guide through hole, the thickness of the outer wall of the middle-lower section of the second rotating shaft is smaller than that of the outer wall of the upper section to form a thin-wall section, and the impact pressure cap is sleeved, the outer wall of the impact pressing cap is in contact with the inner wall of the drilling tool body, the perforated sleeve is sleeved outside the upper section of the thin-walled section of the second rotating shaft through a vertical central through hole of the perforated sleeve and is positioned between the upper section of the second rotating shaft and the impact pressing cap, the perforated sleeve is connected with the impact pressing cap through a thin flat key, a sleeve through hole is arranged on the wall of the perforated sleeve, a plurality of first rotating shaft through holes which are circumferentially distributed are arranged on the wall of the upper section of the second rotating shaft, a second rotating shaft through hole is arranged on the wall of the upper section of the thin-walled section of the second rotating shaft, the sleeve through hole and the second rotating shaft through hole can correspondingly communicate and have the same central axis, an included angle of 15-75 degrees is formed between the central axis and the vertical direction, and the driving valve is sleeved outside the middle-lower section of the thin-walled section of the second rotating shaft through a vertical central through hole of the, the driving valve is provided with transverse driving through holes, two driving through holes with the same vertical height are symmetrically distributed on two sides of the vertical central axis of the driving valve, a plurality of transverse third rotating shaft through holes are arranged on the circumferential wall of the vertical height position corresponding to the driving through holes on the thin-wall section of the second rotating shaft, the impact hammer is sleeved outside the driving valve through the vertical central through hole of the impact hammer and can rotate, two convex hammers are arranged on the circumferential wall of the impact hammer, the two hammers with the same vertical height are symmetrically distributed on two sides of the vertical central axis of the impact hammer, the positions on the circumferential wall of the impact hammer, which are positioned on two sides of the circumferential direction of the hammers, are respectively provided with transverse impact hammer through holes, the circumferential distance between the inner ends of the two impact hammer through holes on the same two sides of the hammer is the same as the circumferential width of, the impact sleeve is sleeved outside the impact hammer through a vertical central through hole of the impact sleeve, the outer wall of the impact sleeve is in contact with and fixed to the inner wall of the drilling tool body, a sleeve groove which is transversely concave inwards is formed in the inner wall of the impact sleeve, the two sleeve grooves are symmetrically distributed on two sides of the vertical central axis of the impact sleeve, the two hammers are respectively arranged in the two sleeve grooves and can circumferentially swing, the two impact hammer through holes on the same two sides of each hammer can be simultaneously arranged in the corresponding sleeve grooves, the lower end of the impact pressure cap is connected with the upper end of the impact sleeve, the lower end of the impact sleeve is connected with the lower joint, the nozzle is mounted at the lower end of the second rotating shaft, the vertical central through hole of the nozzle is a conical hole which is large at the top and small at the bottom, and the minimum aperture of the vertical central through hole of the nozzle is smaller, and the upper end and the lower end of the vertical central through hole of the nozzle are respectively communicated with the lower end of the vertical central through hole of the second rotating shaft and the upper end of the vertical central through hole of the lower joint.

In the structure, the non-fixed connecting device is used for enabling the lower joint and the drilling tool body to have a transmission function and a micro-distance moving space at the same time, so that the rotary power can be transmitted, the lower joint can drive the drill bit to have a micro-moving space, and preconditions are provided for realizing the function that the drill bit is vibrated circumferentially and axially to improve the drilling effect; the diversion pressure cap is used for rotatably mounting the first rotating shaft and is also used as a diversion element for diverting the drilling fluid in the vertical central through hole of the upper joint to the space where the turbine is located; the first rotating shaft is matched with the turbine and driven by a rotor of the turbine to rotate so as to drive the second rotating shaft to rotate; the turbine is used for converting the flowing power of the drilling fluid into the rotating power of the first rotating shaft, and is a conventional device, wherein a stator is used for installation, and a rotor is used for rotating under the drive of liquid; the flow distribution plate is used for rotatably mounting the first rotating shaft together with the flow guide pressing cap and conducting flow at the same time; the second rotating shaft is used for rotating under the driving of the first rotating shaft and is matched with the shunt gap, the sleeve with the hole and the driving valve to form a drilling fluid shunt structure and a drilling fluid driving structure, hydraulic changes caused by the connection and blocking of the sleeve through hole and the second rotating shaft through hole are utilized, the sleeve with the hole is subjected to downward hydraulic pressure during connection to be increased instantly, the sleeve with the hole is pushed to impact the impact pressing cap downwards, the impact pressing cap impacts the impact sleeve downwards to form downward-direction-axial impact force which finally acts on the drill bit through the lower connector, and the drill bit is subjected to periodic axial vibration; drilling fluid in a vertical central through hole of the second rotating shaft enters a driving through hole of the driving valve through a through hole of the third rotating shaft and then enters a sleeve groove through different through holes of the impact hammer respectively to push a hammer head of the impact hammer to rotate circularly in the clockwise direction and the anticlockwise direction, and the hammer head repeatedly impacts the sleeve groove of the impact sleeve to form impact force in the circumferential direction and finally acts on the drill bit through the lower connector, so that the drill bit is subjected to periodic circumferential vibration; the nozzle is used for reducing the sectional area of the drilling fluid flowing out of the nozzle, so that the pressure of the drilling fluid in the vertical central through hole of the second rotating shaft is increased, and the drilling fluid is forced to enter the driving through hole of the driving valve.

Furthermore, in order to facilitate processing and assembly and facilitate blocking drilling fluid from entering a first rotating shaft from the middle to influence the driving effect of a turbine, a rotating shaft pressure head is installed between the diversion pressure cap and the upper end of the first rotating shaft, the rotating shaft pressure head is of a solid structure, the upper end of the rotating shaft pressure head is connected with the diversion pressure cap through a first inner hexagonal cylindrical head screw and is blocked and limited through a first hole by an elastic check ring, a first deep groove ball bearing is installed between the side part of the rotating shaft pressure head and the diversion pressure cap, and the lower end of the rotating shaft pressure head is fixedly connected with the upper end of the first rotating shaft through threads; and a second deep groove ball bearing is arranged between the lower end of the first rotating shaft and the valve plate and is positioned by the bearing plate and a second inner hexagonal socket head cap screw.

Preferably, in order to improve the rotation driving effect on the first rotating shaft, the number of the turbines is multiple, and the turbines are vertically arranged in the overflowing gap to form a turbine group.

Furthermore, in order to facilitate transition connection between the upper joint and the diversion pressure cap, a support ring is installed between the lower end of the upper joint and the upper end of the diversion pressure cap, and a vertical central through hole of the support ring is communicated with a vertical central through hole of the upper joint and the diversion through hole of the pressure cap respectively.

Further, for the convenience of installing the turbine and being convenient for adjust the installation spacing, the top the stator upper end of turbine with install the adjustable ring between the lower extreme of cap is pressed in the water conservancy diversion, the below the rotor lower extreme of turbine with install down the adjustable ring between the outer wall of first pivot.

Further, in order to facilitate the rotation of the driving valve and the impact hammer, a sealing bearing is arranged between the impact hammer and the driving valve and between the impact pressing cap.

Further, in order to facilitate the installation of the nozzle and the discharge of drilling fluid in the impact sleeve, the lower end of the second rotating shaft is connected with the nozzle through a nozzle installation seat, the front end of the nozzle is blocked and limited by the inner cavity wall of the nozzle installation seat, the rear end of the nozzle is blocked and limited by an elastic check ring through a second hole installed in the inner cavity of the nozzle installation seat, the upper end and the lower end of a vertical central through hole of the nozzle installation seat are respectively and correspondingly communicated with the lower end of the vertical central through hole of the second rotating shaft and the upper end of the vertical central through hole of the nozzle, the lower end of the nozzle installation seat extends towards the periphery and is contacted with the lower end of the impact sleeve to be limited, a drainage gap is arranged between the outer wall of the nozzle installation seat and the inner wall of the lower section of the impact sleeve, the drainage gap is communicated with the sleeve groove, and a drainage through hole is arranged on the lower section wall of the, the drainage through hole is respectively communicated with the drainage gap and the vertical central through hole of the lower joint.

Preferably, in order to facilitate processing and assembly and have functions of circumferential transmission connection, axial transmission connection and micro-distance movement, the non-fixed connection device comprises a transmission spline, an elastic retainer ring for a third hole, a steel ball and a mounting screw, the transmission spline is mounted at the upper end of the lower joint and the lower end of the drilling tool body, and the transmission spline is used for enabling the drilling tool body to drive the lower joint to rotate; the lower section of the drilling tool body is sleeved outside the upper section of the lower joint, a circumferential installation through hole is formed in the wall of the lower section of the drilling tool body, a circumferential annular groove is formed in the outer wall of the upper section of the lower joint, the installation through hole corresponds to the annular groove, the steel ball is arranged in the installation through hole and the annular groove, the installation screw is arranged in the installation through hole, the inner end of the installation screw abuts against the steel ball, and the outer end of the installation screw is installed at the outer end of the installation through hole and is blocked and limited by the elastic check ring for the third hole.

Further, in order to improve the connection stability and the sealing performance, the lower end of the upper joint is in threaded connection with the upper end of the drilling tool body, a first sealing ring is arranged at the contact position of the lower end of the upper joint and the upper end of the drilling tool body, the lower end of the first rotating shaft is in threaded connection with the upper end of the second rotating shaft, a second sealing ring is arranged at the contact position of the lower end of the first rotating shaft and the upper end of the second rotating shaft, a third sealing ring is arranged at the contact position of the lower end of the impact sleeve and the upper end of the; in order to prolong the service life of the sleeve with holes, the sleeve with holes is a hard alloy sleeve.

Specifically, in order to facilitate connection of the drill rod and the drill bit, the upper section of the vertical central through hole of the upper joint is a taper hole, an upper joint internal thread is arranged on the wall of the taper hole, and the lower section of the vertical central through hole of the lower joint is a taper hole, and a lower joint internal thread is arranged on the wall of the taper hole.

The beneficial effects of the utility model reside in that:

the utility model integrates the upper joint, the drilling tool body, the lower joint, the diversion pressure cap, the first rotating shaft, the turbine, the valve plate, the second rotating shaft, the impulse pressure cap, the sleeve with holes, the impulse sleeve, the driving valve, the impact hammer and the nozzle into a rotary transmission structure, a circumferential vibration structure and an axial vibration structure, when in use, the upper end and the lower end are respectively connected with the drill rod and the drill bit, on the premise of not influencing the function of transmitting the rotary power of the drill rod to the drill bit, the fluid power of the drilling fluid is converted into the periodic circumferential vibration and the axial vibration which are finally formed on the drill bit by the lower joint, the vibration direction and the vibration frequency of the drilling fluid form a rule, thereby not only effectively reducing the 'stick-slip effect' generated by the circumferential irregular vibration, helping the drill bit to better bite into the stratum, improving the drilling speed and the efficiency, improving the well quality and protecting the drill bit, the service life of the drill bit is prolonged; if the vibration driving function of the internal part fails due to damage of the internal part after long-term use, decoupling is not needed, the transmission function of the rotary power is not influenced, and the internal part can be continuously used.

Drawings

FIG. 1 is an axial semi-sectional view of a drill according to the present invention capable of producing periodic circumferential and axial vibrations to a drill bit;

FIG. 2 is an enlarged view of section A-A of FIG. 1;

FIG. 3 is one of the cross-sectional views, from the same perspective and to the same scale as FIG. 2, of a drill tool of the present invention capable of producing periodic circumferential and axial vibrations of the drill bit in use;

FIG. 4 is a second cross-sectional view of the drill of the present invention in use, with the same view and scale as FIG. 2, capable of producing periodic circumferential and axial vibrations of the drill bit;

FIG. 5 is a third cross-sectional view, from the same perspective and scale as FIG. 2, of a drill of the present invention capable of producing periodic circumferential and axial vibration of the drill bit in use;

FIG. 6 is a fourth cross-sectional view, with the same view and scale as FIG. 2, of a drill of the present invention in use, capable of producing periodic circumferential and axial vibrations to a drill bit;

fig. 7 is a fifth cross-sectional view of the drill according to the present invention, which is capable of generating periodic circumferential and axial vibrations to the drill bit, and the view angle and scale are the same as those of fig. 2.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 and 2, the drilling tool capable of generating periodic circumferential and axial vibration to a drill bit of the present invention comprises a casing-shaped drilling tool body 8, an upper joint 1 for connecting with a drill rod and a lower joint 43 for connecting with a drill bit, wherein the upper joint 1 and the lower joint 43 are respectively connected with the upper end and the lower end of the drilling tool body 8, the upper joint 1 is provided with a vertical central through hole 3, the lower joint 43 is provided with a vertical central through hole, the lower joint 43 is connected with the lower end of the drilling tool body 8 through a non-fixed connection device, and the non-fixed connection device enables a microspur moving space to be formed between the lower joint 43 and the drilling tool body 8 while having a transmission function; the drilling tool also comprises a flow guiding pressure cap 9, a first rotating shaft 17, a turbine, a flow distribution plate 20, a second rotating shaft 26, an impact pressure cap 32, a sleeve 28 with a hole, an impact sleeve 39, a driving valve 36, an impact hammer 37 and a nozzle 46 which are arranged in a central through hole of the drilling tool body 8, wherein the flow guiding pressure cap 9 is fixedly connected with the drilling tool body 8, the upper end of the flow guiding pressure cap is close to the upper joint 1, a vertical pressure cap flow guiding through hole 10 is arranged at a position on the flow guiding pressure cap 9 close to the outer wall, the upper end of the pressure cap flow guiding through hole 10 is communicated with the lower end of a vertical central through hole 3 of the upper joint 1, the upper end of the first rotating shaft 17 is connected with the flow guiding pressure cap 9 and can rotate freely, an overflowing gap (not marked in the figure) is reserved between the outer wall of the first rotating shaft 17 and the inner wall of the drilling tool body 8, the upper, the stator 15 of the turbine is connected with the inner wall of the drilling tool body 8, the rotor 16 of the turbine is connected with the outer wall of the first rotating shaft 17, the lower end of the first rotating shaft 17 is connected with the flow distribution plate 20 and can rotate freely, the flow distribution plate 20 is fixedly connected with the drilling tool body 8, a vertical flow distribution plate flow guide hole 21 is arranged at the position, close to the outer wall, on the flow distribution plate 20, the upper end of the flow distribution plate flow guide hole 21 is correspondingly communicated with the lower end of the flow distribution gap, the upper end of the second rotating shaft 26 is fixedly connected with the lower end of the first rotating shaft 17, the second rotating shaft 26 is provided with a vertical central through hole 31, a flow distribution gap 55 is reserved between the outer wall of the second rotating shaft 26 and the inner wall of the drilling tool body 8, the upper end of the flow distribution gap 55 is correspondingly communicated with the lower end of the flow distribution plate flow guide hole 21, the thickness of the outer wall of the middle-lower section of the second rotating shaft 26 is smaller than that of the outer wall of the upper section to, the outer wall of the impact pressing cap 32 is contacted with the inner wall of the drill body 8, the perforated sleeve 28 is sleeved outside the upper section of the thin-walled section 33 of the second rotating shaft 26 through a vertical central through hole of the perforated sleeve 28 and is positioned between the upper section of the second rotating shaft 26 and the impact pressing cap 32, the perforated sleeve 28 is connected with the impact pressing cap 32 through a thin flat key 30, a sleeve through hole 27 is arranged on the cylinder wall of the perforated sleeve 28, a plurality of first rotating shaft through holes 25 which are circumferentially distributed are arranged on the upper section wall of the second rotating shaft 26, an included angle of 15-75 degrees, preferably 30 degrees, is formed between the central axis of the first rotating shaft through hole 25 and the vertical direction, a second rotating shaft through hole 29 is arranged on the upper section wall of the thin-walled section 33 of the second rotating shaft 26, the sleeve through hole 27 and the second rotating shaft through hole 29 can be correspondingly communicated and have the same central axis, and an included angle of, preferably, the included angle is 30 degrees, the driving valve 36 is sleeved outside the middle-lower section of the thin-walled section 33 of the second rotating shaft 26 through a vertical central through hole of the driving valve 36 and is fixedly connected with the middle-lower section of the thin-walled section 33 of the second rotating shaft 26, the driving valve 36 is provided with a transverse driving through hole 38, two driving through holes 38 with the same vertical height are symmetrically distributed on two sides of the vertical central axis of the driving valve 36, the circumferential wall of the thin-walled section 33 of the second rotating shaft 26 at the vertical height position corresponding to the driving through holes 38 is provided with a plurality of transverse third rotating shaft through holes 34, the impact hammer 37 is sleeved outside the driving valve 36 through a vertical central through hole of the impact hammer 37 and can rotate, the outer circumferential wall of the impact hammer 37 is provided with two convex hammers (not marked in the figure), the two hammers with the same vertical height are symmetrically distributed on two sides of, the circumferential distance between the inner ends of two percussion hammer through holes 54 on both sides of the same hammer is the same as the circumferential width of the corresponding driving through hole 38, the percussion sleeve 39 is sleeved outside the percussion hammer 37 through the vertical central through hole of the percussion sleeve 39, the outer wall of the percussion sleeve 39 is contacted and fixed with the inner wall of the drill body 8, the inner wall of the percussion sleeve 39 is provided with a sleeve groove 53 which is transversely concave, the two sleeve grooves 53 are symmetrically distributed on both sides of the vertical central axis of the percussion sleeve 39, the two hammers are respectively arranged in the two sleeve grooves 53 and can circumferentially swing, the two percussion hammer through holes 54 on both sides of the same hammer can be simultaneously arranged in the corresponding sleeve grooves 53, the lower end of the percussion pressure cap 32 is connected with the upper end of the percussion sleeve 39 through a bolt, the lower end of the percussion sleeve 39 is connected with the lower joint 43, and the nozzle, the vertical center through hole of the nozzle 46 is a tapered hole with a large top and a small bottom, and the minimum aperture of the vertical center through hole is smaller than the aperture of the vertical center through hole 31 of the second rotating shaft 26, and the upper end and the lower end of the vertical center through hole of the nozzle 46 are respectively communicated with the lower end of the vertical center through hole 31 of the second rotating shaft 26 and the upper end of the vertical center through hole of the lower joint 43.

Also shown in fig. 1 is the shaft weight-reducing bore 18 provided in the first shaft 17, and also shown in fig. 2-7 is the sleeve weight-reducing bore 52 provided in the wall of the impingement sleeve 39, which is a conventional compliant structure.

As shown in fig. 1 to 7, the working principle of the drilling tool capable of generating periodic circumferential and axial vibration to the drill bit of the present invention is as follows:

1. the transmission process of the rotary power is as follows: when in use, the drilling tool is respectively connected with a drill rod (not shown) driven by drilling equipment to rotate through the upper connector 1 and is connected with a drill bit (not shown) through the lower connector 43; the drill rod rotates to sequentially drive the upper joint 1, the drilling tool body 8, the lower joint 43 and the drill bit to rotate, so that the drilling function is realized; because the lower joint 43 is connected with the lower end of the drill body 8 through the non-fixed connecting device, and the lower joint 43 and the drill body 8 have a transmission function and a micro-distance moving space, a precondition is provided for the process that the lower joint 43 is vibrated to vibrate the drill bit in the following content.

2. Axial vibration generation process: the drilling fluid flows downwards from the central through hole of the drill rod, enters the overflowing gap after passing through the upper joint 1 and the pressure cap flow guiding through hole 10, drives the rotor of the turbine, then continues to flow downwards, enters the flow dividing gap 55 after passing through the flow distributing disc flow guiding hole 21, is blocked by the impact pressure cap 32 at the lower part in the flow dividing gap 55, cannot continue to flow downwards, and then flows into the vertical central through hole 31 of the second rotating shaft 26 through the first rotating shaft through hole 25, meanwhile, when the second rotating shaft 26 rotates to drive the second rotating shaft through hole 29 to be just aligned and communicated with the sleeve through hole 27, the drilling fluid in the flow dividing gap 55 flows through the sleeve through hole 27 and the second rotating shaft through hole 29 and then enters the vertical central through hole 31 of the second rotating shaft 26, at the moment, because the second rotating shaft through hole 29 and the sleeve through hole 27 are suddenly aligned and communicated, and the second rotating shaft through hole 29 and the sleeve through hole 27 are inclined holes, the drilling fluid will have a sudden downward thrust on the perforated sleeve 28 which is transmitted to the percussion cap 32, percussion sleeve 39 and lower sub 43 and finally to the drill bit, thereby causing a periodic (periodic in time with one revolution of the second shaft 26) axial vibration to the drill bit.

3. The circumferential vibration generating process: the drilling fluid in the overflowing gap drives the rotor of the turbine, the rotor of the turbine drives the first rotating shaft 17 to rotate, the first rotating shaft 17 drives the second rotating shaft 26 to rotate, the second rotating shaft 26 drives the driving valve 36 to rotate, the drilling fluid in the vertical central through hole 31 of the second rotating shaft 26 can bear a certain degree of resistance when flowing downwards to the nozzle 46, the resistance enables the drilling fluid to flow from the third rotating shaft through hole 34 of the second rotating shaft 26 to the driving through hole 38 of the driving valve 36, and as the driving valve 36 rotates, the drilling fluid in the driving through hole 38 can inevitably pass through and can only enter the sleeve groove 53 through one of the pair of impact hammer through holes 54, as shown in the changing process from fig. 2 to fig. 3, the driving valve 36 rotates anticlockwise, the impact hammer 37 rotates and swings clockwise, and stops swinging when swinging to the hammer head contacts with the groove wall at one side of the sleeve groove 53, as shown in fig. 3, the hammer head impacts the groove wall of the sleeve recess 53 once, and the vibration generated by the impact is transmitted to the drill bit through the impact sleeve 39 and the lower joint 43; after the driving valve 36 continues to rotate anticlockwise, drilling fluid can pass through the other of the pair of impact hammer through holes 54 and only enters the sleeve groove 53 at a certain time, as shown in fig. 4, then the drilling fluid drives the impact hammer 37 to swing anticlockwise in a rotating mode, the swinging is stopped when the hammer head swings to be in contact with the other side groove wall of the sleeve groove 53, as shown in fig. 5, the hammer head impacts the groove wall of the sleeve groove 53 once again, and vibration generated by the impact is transmitted to the drill bit through the impact sleeve 39 and the lower connector 43; thus, the second rotating shaft 26 drives the driven valve 36 to rotate counterclockwise by one rotation; then the driven valve 36 continues to rotate anticlockwise, as shown in fig. 6 and 7, the impact hammer 37 rotates and swings clockwise again to complete impact of the groove wall of the sleeve groove 53 once, and the process is repeated; when the rotation direction of the second rotating shaft 26 is opposite, the direction of the rotary swing of the impact hammer 37 is also opposite, but the impact hammer can complete two impacts on the groove wall of the sleeve groove 53 in one rotation period; the impact force against the groove wall of the sleeve groove 53 finally generates periodic circumferential vibration (with the time of one rotation of the second rotating shaft 26 as a period) to the drill.

The vibration direction and the vibration frequency of the periodic axial vibration and the circumferential vibration of the drill bit form a rule, so that the 'stick-slip effect' generated by circumferential irregular vibration is effectively reduced, the drill bit is helped to better bite into the stratum, the drilling speed and the drilling efficiency are improved, the borehole quality is improved, the drill bit is protected, and the service life of the drill bit is prolonged.

As shown in fig. 1 and fig. 2, the following also discloses various optimized structures of the present invention, and one or more of the following structures can be superposed and combined with the above structures according to actual needs to form a new more optimized technical solution.

In order to facilitate processing and assembly and prevent drilling fluid from entering the first rotating shaft 17 from the middle to influence the driving effect of the turbine, a rotating shaft pressure head 14 is arranged between the flow guide pressure cap 9 and the upper end of the first rotating shaft 17, the rotating shaft pressure head 14 is of a solid structure, the upper end of the rotating shaft pressure head 14 is connected with the flow guide pressure cap 9 through a first inner hexagonal cylinder head screw 5 and is limited by a first hole through an elastic retainer ring 4, a first deep groove ball bearing 12 is arranged between the side part of the rotating shaft pressure head 14 and the flow guide pressure cap 9 and is limited through a bearing retainer ring 11, and the lower end of the rotating shaft pressure head 14 is fixedly connected with the upper end of the first rotating shaft 17 through threads; a second deep groove ball bearing 22 is installed between the lower end of the first rotating shaft 17 and the port plate 20 and is positioned by a bearing plate 23 and a second hexagon socket head cap screw (not marked in the figure).

In order to improve the rotating driving effect on the first rotating shaft 17, the number of the turbines is multiple, and the turbines are vertically arranged in the overflowing clearance to form a turbine group.

In order to facilitate the transition connection between the upper joint 1 and the diversion pressure cap 9, a support ring 7 is arranged between the lower end of the upper joint 1 and the upper end of the diversion pressure cap 9, and the vertical central through hole of the support ring 7 is respectively communicated with the vertical central through hole of the upper joint 1 and the diversion through hole 10 of the pressure cap.

In order to facilitate the installation of the turbine and the adjustment of the installation distance, an upper adjusting ring 13 is installed between the upper end of a stator 15 of the turbine at the top and the lower end of the guide pressure cap 9, and a lower adjusting ring 19 is installed between the lower end of a rotor 16 of the turbine at the bottom and the outer wall of a first rotating shaft 17.

In order to facilitate the rotation of the driven valve 36 and the impact hammer 37, a seal bearing 35 is installed between the impact hammer 37 and the driven valve 36 and the impact pressure cap 32.

In order to facilitate the installation of the nozzle 46 and the discharge of drilling fluid in the impact sleeve 39, the lower end of the second rotating shaft 26 is connected with the nozzle 46 through the nozzle mounting seat 44, the front end of the nozzle 46 is blocked and limited by the inner cavity wall of the nozzle mounting seat 44, the rear end of the nozzle 46 is blocked and limited by the elastic retainer ring 47 through the second hole installed in the inner cavity of the nozzle mounting seat 44, the upper end and the lower end of the vertical central through hole of the nozzle mounting seat 44 are respectively communicated with the lower end of the vertical central through hole 31 of the second rotating shaft 26 and the upper end of the vertical central through hole of the nozzle 46, the lower end of the nozzle mounting seat 44 extends towards the periphery and is contacted with the lower end of the impact sleeve 39 to be limited, a drainage gap 48 is arranged between the outer wall of the nozzle mounting seat 44 and the inner wall of the lower section of the impact sleeve 39, the drainage gap 48 is communicated with the sleeve groove 53, the drainage through-hole 50 communicates with the drainage gap 48 and the vertically central through-hole of the lower joint 43, respectively.

In order to facilitate processing and assembly, and have functions of circumferential transmission connection, axial transmission connection and microspur movement, the non-fixed connection device comprises a transmission spline (not shown in the figure, but easily understood, only a conventional spline is adopted), an elastic retainer ring 40 for a third hole, a steel ball 42 and a mounting screw 41, the transmission spline is mounted at the upper end of the lower joint 43 and the lower end of the drilling tool body 8 and is arranged in a corresponding spline mounting hole, and the transmission spline is used for driving the drilling tool body 8 to drive the lower joint 43 to rotate; the lower section of the drilling tool body 8 is sleeved outside the upper section of the lower joint 43, a circumferential installation through hole (not marked in the figure) is formed in the wall of the lower section of the drilling tool body 8, a circumferential annular groove (not marked in the figure) is formed in the outer wall of the upper section of the lower joint 43, the installation through hole corresponds to the annular groove, the steel ball 42 is arranged in the installation through hole and the annular groove at the same time, the installation screw 41 is arranged in the installation through hole, the inner end of the installation screw abuts against the steel ball 42, and the outer end of the installation screw is installed on the third hole at the outer end of the installation through hole and is blocked and.

In order to improve the connection stability and the sealing performance, the lower end of the upper joint 1 is in threaded connection with the upper end of the drill body 8, a first sealing ring 6 is arranged at the contact position of the lower end of the upper joint and the upper end of the drill body, a second sealing ring 24 is arranged at the contact position of the lower end of the first rotating shaft 17 and the upper end of the second rotating shaft 26, a third sealing ring 49 is arranged at the contact position of the lower end of the impact sleeve 39 and the upper end of the lower joint 43, and a fourth sealing ring 45 is arranged at the contact position of the nozzle 46 and the nozzle mounting seat 44; to extend the life of the perforated sleeve 28, the perforated sleeve 28 is a cemented carbide sleeve.

In order to facilitate the connection of the drill rod and the drill bit, the upper section of the vertical central through hole 3 of the upper joint 1 is a taper hole, an upper joint internal thread 2 is arranged on the wall of the taper hole, the lower section of the vertical central through hole of the lower joint 43 is a taper hole, and a lower joint internal thread 51 is arranged on the wall of the taper hole.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims

1. The utility model provides a can produce periodic circumference and axial vibration's drilling tool to drill bit, includes the drilling tool body of sleeve shape, be used for the top connection be connected with the drilling rod and be used for the lower clutch of being connected with the drill bit, the top connection with the lower clutch respectively with the upper end and the lower extreme of drilling tool body are connected, the top connection with the lower clutch is equipped with vertical central through-hole, its characterized in that respectively: the lower joint is connected with the lower end of the drilling tool body through a non-fixed connecting device, and the non-fixed connecting device enables a micro-distance moving space to be formed between the lower joint and the drilling tool body while having a transmission function; the drilling tool further comprises a diversion pressure cap, a first rotating shaft, a turbine, a flow distribution disc, a second rotating shaft, an impact pressure cap, a sleeve with holes, an impact sleeve, a driving valve, an impact hammer and a nozzle which are arranged in the central through hole of the drilling tool body, the diversion pressure cap is fixedly connected with the drilling tool body, the upper end of the diversion pressure cap is close to the upper joint, a vertical pressure cap diversion through hole is arranged at a position on the diversion pressure cap, which is close to the outer wall, the upper end of the pressure cap diversion through hole is communicated with the lower end of the vertical central through hole of the upper joint, the upper end of the first rotating shaft is connected with the diversion pressure cap and can rotate freely, a flow gap is reserved between the outer wall of the first rotating shaft and the inner wall of the drilling tool body, the upper end of the flow gap is correspondingly communicated with the lower end of the pressure cap diversion through hole, the turbine is arranged in the flow gap, and the, the rotor of the turbine is connected with the outer wall of the first rotating shaft, the lower end of the first rotating shaft is connected with the flow distribution disc and can rotate freely, the flow distribution disc is fixedly connected with the drilling tool body, a vertical flow distribution disc flow guide through hole is formed in the position, close to the outer wall, of the flow distribution disc, the upper end of the flow distribution disc flow guide through hole is correspondingly communicated with the lower end of the flow passing gap, the upper end of the second rotating shaft is fixedly connected with the lower end of the first rotating shaft, a vertical central through hole is formed in the second rotating shaft, a flow distribution gap is reserved between the outer wall of the second rotating shaft and the inner wall of the drilling tool body, the upper end of the flow distribution gap is correspondingly communicated with the lower end of the flow distribution disc flow guide through hole, the thickness of the outer wall of the middle-lower section of the second rotating shaft is smaller than that of the outer wall of the upper section to form a thin-wall section, and the impact pressure cap is sleeved, the outer wall of the impact pressing cap is in contact with the inner wall of the drilling tool body, the perforated sleeve is sleeved outside the upper section of the thin-walled section of the second rotating shaft through a vertical central through hole of the perforated sleeve and is positioned between the upper section of the second rotating shaft and the impact pressing cap, the perforated sleeve is connected with the impact pressing cap through a thin flat key, a sleeve through hole is arranged on the wall of the perforated sleeve, a plurality of first rotating shaft through holes which are circumferentially distributed are arranged on the wall of the upper section of the second rotating shaft, a second rotating shaft through hole is arranged on the wall of the upper section of the thin-walled section of the second rotating shaft, the sleeve through hole and the second rotating shaft through hole can correspondingly communicate and have the same central axis, an included angle of 15-75 degrees is formed between the central axis and the vertical direction, and the driving valve is sleeved outside the middle-lower section of the thin-walled section of the second rotating shaft through a vertical central through hole of the, the driving valve is provided with transverse driving through holes, two driving through holes with the same vertical height are symmetrically distributed on two sides of the vertical central axis of the driving valve, a plurality of transverse third rotating shaft through holes are arranged on the circumferential wall of the vertical height position corresponding to the driving through holes on the thin-wall section of the second rotating shaft, the impact hammer is sleeved outside the driving valve through the vertical central through hole of the impact hammer and can rotate, two convex hammers are arranged on the circumferential wall of the impact hammer, the two hammers with the same vertical height are symmetrically distributed on two sides of the vertical central axis of the impact hammer, the positions on the circumferential wall of the impact hammer, which are positioned on two sides of the circumferential direction of the hammers, are respectively provided with transverse impact hammer through holes, the circumferential distance between the inner ends of the two impact hammer through holes on the same two sides of the hammer is the same as the circumferential width of, the impact sleeve is sleeved outside the impact hammer through a vertical central through hole of the impact sleeve, the outer wall of the impact sleeve is in contact with and fixed to the inner wall of the drilling tool body, a sleeve groove which is transversely concave inwards is formed in the inner wall of the impact sleeve, the two sleeve grooves are symmetrically distributed on two sides of the vertical central axis of the impact sleeve, the two hammers are respectively arranged in the two sleeve grooves and can circumferentially swing, the two impact hammer through holes on the same two sides of each hammer can be simultaneously arranged in the corresponding sleeve grooves, the lower end of the impact pressure cap is connected with the upper end of the impact sleeve, the lower end of the impact sleeve is connected with the lower joint, the nozzle is mounted at the lower end of the second rotating shaft, the vertical central through hole of the nozzle is a conical hole which is large at the top and small at the bottom, and the minimum aperture of the vertical central through hole of the nozzle is smaller, and the upper end and the lower end of the vertical central through hole of the nozzle are respectively communicated with the lower end of the vertical central through hole of the second rotating shaft and the upper end of the vertical central through hole of the lower joint.

2. A drilling tool capable of producing periodic circumferential and axial vibrations to a drill bit as claimed in claim 1, wherein: a rotating shaft pressure head is arranged between the diversion pressure cap and the upper end of the first rotating shaft, the rotating shaft pressure head is of a solid structure, the upper end of the rotating shaft pressure head is connected with the diversion pressure cap through a first inner hexagonal cylindrical head screw and is blocked and limited by an elastic check ring through a first hole, a first deep groove ball bearing is arranged between the side part of the rotating shaft pressure head and the diversion pressure cap, and the lower end of the rotating shaft pressure head is fixedly connected with the upper end of the first rotating shaft through threads; and a second deep groove ball bearing is arranged between the lower end of the first rotating shaft and the valve plate and is positioned by the bearing plate and a second inner hexagonal socket head cap screw.

3. A drilling tool capable of producing periodic circumferential and axial vibrations to a drill bit as claimed in claim 1, wherein: the turbine is a plurality of, a plurality of turbine vertical arrangement constitute the turbine group in the clearance overflows.

4. A drilling tool capable of producing periodic circumferential and axial vibrations to a drill bit as claimed in claim 1, wherein: and a support ring is arranged between the lower end of the upper joint and the upper end of the diversion pressure cap, and a vertical central through hole of the support ring is respectively communicated with the vertical central through hole of the upper joint and the diversion through hole of the pressure cap.

5. A drilling tool capable of producing periodic circumferential and axial vibrations to a drill bit as claimed in claim 1, wherein: an upper adjusting ring is installed between the upper end of a stator of the turbine on the top and the lower end of the flow guide pressure cap, and a lower adjusting ring is installed between the lower end of a rotor of the turbine on the bottom and the outer wall of the first rotating shaft.

6. A drilling tool capable of producing periodic circumferential and axial vibrations to a drill bit as claimed in claim 1, wherein: and a sealing bearing is arranged between the impact hammer and the driving valve and between the impact pressing cap.

7. A drilling tool capable of producing periodic circumferential and axial vibrations to a drill bit as claimed in claim 1, wherein: the lower end of the second rotating shaft is connected with the nozzle through a nozzle mounting seat, the front end of the nozzle is blocked and limited by the inner cavity wall of the nozzle mounting seat, the rear end of the nozzle is blocked and limited by an elastic retainer ring through a second hole arranged in the inner cavity of the nozzle mounting seat, the upper end and the lower end of the vertical central through hole of the nozzle mounting seat are respectively communicated with the lower end of the vertical central through hole of the second rotating shaft and the upper end of the vertical central through hole of the nozzle, the lower end of the nozzle mounting seat extends towards the periphery and is in contact with the lower end of the impact sleeve to be limited, a drainage gap is arranged between the outer wall of the nozzle mounting seat and the inner wall of the lower section of the impact sleeve, the drainage gap is communicated with the sleeve groove, a drainage through hole is arranged on the lower section wall of the nozzle mounting seat, the drainage through hole is respectively communicated with the drainage gap and the vertical central through hole of the lower joint.

8. A drilling tool capable of imparting periodic circumferential and axial vibrations to a drill bit according to any of claims 1-7, wherein: the non-fixed connecting device comprises a transmission spline, an elastic retainer ring for a third hole, a steel ball and a mounting screw, the transmission spline is mounted at the upper end of the lower joint and the lower end of the drilling tool body, and the transmission spline is used for enabling the drilling tool body to drive the lower joint to rotate; the lower section of the drilling tool body is sleeved outside the upper section of the lower joint, a circumferential installation through hole is formed in the wall of the lower section of the drilling tool body, a circumferential annular groove is formed in the outer wall of the upper section of the lower joint, the installation through hole corresponds to the annular groove, the steel ball is arranged in the installation through hole and the annular groove, the installation screw is arranged in the installation through hole, the inner end of the installation screw abuts against the steel ball, and the outer end of the installation screw is installed at the outer end of the installation through hole and is blocked and limited by the elastic check ring for the third hole.

9. A drilling tool capable of imparting periodic circumferential and axial vibrations to a drill bit according to any of claims 1-7, wherein: the lower end of the upper joint is in threaded connection with the upper end of the drilling tool body, a first sealing ring is arranged at the contact position of the lower end of the upper joint and the upper end of the drilling tool body, the lower end of the first rotating shaft is in threaded connection with the upper end of the second rotating shaft, a second sealing ring is arranged at the contact position of the lower end of the first rotating shaft and the upper end of the second rotating shaft, the lower end of the impact sleeve is in threaded connection with the upper end of the lower joint, and a third sealing ring is arranged; the sleeve with the hole is a hard alloy sleeve.

10. A drilling tool capable of imparting periodic circumferential and axial vibrations to a drill bit according to any of claims 1-7, wherein: the upper section of the vertical central through hole of the upper joint is a taper hole, an upper joint internal thread is arranged on the wall of the taper hole, and the lower section of the vertical central through hole of the lower joint is a taper hole, and a lower joint internal thread is arranged on the wall of the taper hole.