CN206174873U - Composite drill bit with turn to rim plate - Google Patents

Abstract

The utility model discloses a composite drill bit with turn to rim plate, including the bit body, the rim plate, be provided with the ring gear on the rim plate, the rim plate can rotate by relative bit body, it turns to the rim plate to be equipped with at least one on the bit body, turn to the rim plate by the rim plate with turn to the seat form, it installs on the bit body through rotating to connect to turn to the seat, it can rotate to turn to a relative bit body, the rim plate is installed on turning to the seat through rotating to connect, it is rotatory that the rim plate can turn to the seat relatively, the rotation axis that the rotation axis of rim plate turned to the seat relatively has the skew, and the offset is greater than the radial twentieth of rim plate ring gear, be lighter than three times of rim plate ring gear diameter, the rotation axis and drill bit axis misalignment that turn to the seat that turn to the rim plate that are close to the drill bit core, still be provided with fixed cutting structure or on -fixed cutting structure on the bit body. The utility model provides a life -span of rim plate cutting teeth is too short problem the time, can improve the broken rock efficiency of drill bit.

Description

A kind of composite drill bit with steering wheel disc

Technical field

The invention belongs to the drilling equipment skill such as the construction of petroleum gas, mine engineering, building foundation engineering, geology, hydrology Art field, more particularly to a kind of composite drill bit.

Background technology

Drill bit is to fractured rock, the rock crushing tool of formation pit shaft in drilling engineering.Disc drill bit（Also referred to as disk drill Head, dish-shaped drill bit or dish-style drill bit）It is a kind of drill bit of brand-new tooth-shape structure, its flank of tooth is made and gear wheel（Or title wheel disc）Bus Vertical or annular into certain helical angle continuously or intermittently gear ring.The rock breaking mechanism of disc drill bit is different from conventional rotary drill Head, when gear ring grinds along rock rolling, using big contact stress catalase is forced, and forms the broken-rock zone of annular.Due to Gear ring is easy to gear wheel into annular（Or title wheel disc）Continuous rolling on rock, therefore, disc type is bored compared with tricone bit The service load of head is more steady, and the load fluctuation amplitude suffered by bearing is also much smaller.The disc drill bit of different size type Bench test and commercial test results all show that compared with conventional tricone bit, disc drill bit is in hard, extremely hard, abrasiveness Stratum and deep-well, slim-hole drilling more effectively.Last century mid-term, has in the country such as the former Soviet Union, the U.S., France, Britain The research and test of disc drill bit, platform experiment and the result of field experimentation at that time all show good prospect, but today But it is difficult to see use of the disc drill bit in drilling well.Disc drill bit cutting tooth（Fluted disc）Fatigue rupture, gear ring flow and mill Grinding abrasion is its main failure forms.Operating mode of the drill bit when shaft bottom works is extremely complex, vibrates during bit operation（Including Axial vibration and oscillation crosswise）It is inevitable, the oscillation crosswise of drill bit is to cause wheel disc fatigue rupture, gear ring flow and mill One of principal element of damage.Because when drill bit occurs oscillation crosswise, wheel disc will be along vertical（Or be close to vertical）In wheel disc circle Circumferential direction is scraped with respect to rock sliding and cut, i.e., wheel disc is laterally scraped and cuts rock.Wheel disc is laterally scraped and cuts rock and will directly contribute wheel disc gear ring Lose and flow, and aggravate the abrasion of wheel disc gear ring.Main cause of the disc drill bit without real popularization and application at the scene is just Be cutting tooth life-span it is too short, it is difficult to meet the requirement of drilling well.

There is stationary cutting structure and on-fixed cutting structure simultaneously on bit body（Such as cone structure）Composite drill bit be The new rock crushing tool of simultaneously popularization and application is gradually risen in recent years.Composite drill bit is broken using the synergy of different cutting structures Rock, in some bad grounds significantly drilling speed-raising effect can be played.Due to the disadvantages mentioned above of disc drill bit, limit itself and its The performance of the advantage that his structure composite brings.

The content of the invention

It is an object of the invention to provide it is a kind of with the composite drill bit for turning to wheel disc, to improve the efficiency of breaking rock of drill bit and make Use the life-span.

The object of the invention is realized by following technical proposals：

A kind of composite drill bit with steering wheel disc, including bit body, wheel disc, are provided with gear ring, wheel disc energy phase on wheel disc Bit body is rotated, bit body is provided with least one steering wheel disc, turn to wheel disc and be made up of wheel disc and steering base, steering base leads to Cross rotation connection to be arranged on bit body, steering base rotates relative to drill bit physical ability, wheel disc is arranged on steering base by rotating connection On, wheel disc can be relative to steering base rotation, and the rotation axiss of wheel disc offset with respect to the rotation axiss of steering base, and offset distance is more than / 20th of wheel disc gear ring radius, less than three times of wheel disc diameter ring gear, near the steering of the steering wheel disc of drill bit center portion The rotation axiss of seat are misaligned with drill axis, and stationary cutting structure or on-fixed cutting structure are additionally provided with bit body.

Cutting structure on drill bit according to cutting structure whether can move with respect to bit body and be divided into stationary cutting structure and On-fixed cutting structure.As the cutting tooth on PDC drill bit is fixed on bit body, cutting tooth is relatively fixed with bit body, and PDC is bored Head category stationary cutting structure drill bit.Gear wheel on rifler is formed to rotate and is connected by bearing arrangement and bit body, drill bit work When making, bit body rotarily drive gear wheel around drill axis rotate while, gear wheel can also around itself axis rotate, on gear wheel Cutting tooth makees the compound motion of complexity under the synthesis that above two is moved, and rifler belongs to on-fixed step cutting structure bit.

During the composite drill bit broken rock drilling work of this patent, bit body rotarily drives the axis of the wheel coiling drill bit of this patent Rotate, wheel disc is contacted with bottom rock, wheel disc will be rotated around the axis of itself under the effect of rock counter-force, in above two motion Compound action under, wheel disc will be rolled on bottom rock.The steering base of the steering wheel disc on this patent bit body is relative to be bored Head physical ability is rotated freely, and the wheel disc on steering base can be relative to steering base rotation, and the rotation axiss of wheel disc are with respect to steering base Rotational axis offset.When turning to wheel disc tactite stone with rock interaction broken rock, the wheel disc and rock for no matter turning to wheel disc connects How is beginning state when tactile, when wheel disc is subject to the active force of rock, because the steering base for turning to wheel disc can relative bit body Rotate, no matter how drill bit moves（Rotation, vibration etc.）, wheel disc in the presence of external force, by being put down perpendicular to steering base axis The power in face（Component）Effect, turning to wheel disc will be promoted the axis around steering base to rotate, and make wheel disc on steering wheel disc The direction of the rotation axiss relative bottom rock motion of bit body at this all the time, i.e., wheel disc is all the time along the relative shaft bottom of wheel disc The direction of motion rolls.

This patent is misaligned with drill axis near the rotation axiss of the steering base of the steering wheel disc of drill bit center portion, and it can be true When protecting bit drilling, the wheel disc near drill bit center portion can smoothly be rolled in shaft bottom.It is reduced or avoided near drill bit center portion The horizontal scraped finish rock of wheel disc.

This patent is compared with the beneficial effect of prior art：

1st, working condition of the drill bit in shaft bottom is extremely complex, and the well that drill bit gets out is also tended to more than outside diameter, drill bit Typically be not preferable Concentric rotation drilling during broken rock drilling work in shaft bottom, can also produce while bit vibration, The compound movements such as pendulum rotation, eccentric rotary, the motion of these complexity makes the cutting structure of drill bit to do ideal around the center of well Circular motion.Common disc drill bit makes wheel disc gear ring produce lateral sliding due to above-mentioned compound movement（Scrape and cut）, wheel disc tooth Circle cannot realize simple rolling, this lateral sliding（Scrape and cut）The abrasion of wheel disc gear ring will be made, lost and flow, aggravate wheel disc tooth The damage of circle, hence it is evident that reduce the service life of wheel disc.The rotation axiss of this patent wheel disc with respect to steering base rotational axis offset, Make steering wheel disc that there is orientation self-regulation adaptation function.No matter how complicated the motion of drill bit is, also the no matter initial shape of wheel disc How are state and orientation, turn to the rotation axiss of wheel disc on wheel disc all the time perpendicular to the direction of relative bottom rock motion, that is, take turns The direction that disk is moved all the time along the relative shaft bottom of wheel disc rolls, and wheel disc is reduced or avoided and lateral sliding occurs with respect to rock and scrapes Cut, reduce the abrasion of wheel disc gear ring, lose and is damaged with flow etc., extend the service life of wheel disc and drill bit, and then prolongation drill bit Service life.

2nd, motion of the drill bit in shaft bottom is often complicated, and the compound movement such as vibration, pendulum rotation, eccentric rotary makes common wheel disc Produce lateral sliding and scrape and cut and be damaged.But this patent can improve efficiency of breaking rock using these compound movements of drill bit, because For：The rotation axiss of this patent wheel disc make steering wheel disc have orientation self-regulation adaptive with respect to the rotational axis offset of steering base Answer function, under above-mentioned compound movement, wheel disc can real-time adjustment change rotating direction and realize rolling to rock, answering in drill bit It is neighbouring under miscellaneous motion effect（Radial position is close to）Wheel disc gear ring will occur staggeredly to roll, neighbouring wheel disc gear ring can be real Now intersect and roll broken rock.Intersection roll make shaft bottom roll that broken pattern is more complicated, wheel disc gear ring rolling on bottom rock Broken and damage of rock crackle can intersect and insertion, and this is conducive to improving the efficiency of breaking rock of drill bit.In addition, the bit body of this patent On be additionally provided with stationary cutting structure or on-fixed cutting structure, what is no matter separately set on bit body is which kind of cutting structure, its with The drill bit that wheel disc is mutually compounded to form combined cut structure is turned to, stationary cutting structure or on-fixed cutting structure are same with steering wheel disc When act on bottom rock, various different cutting structures make bottom rock produce the broken of different mechanism, different rock breaking mechanisms Synergy can improve the crushing efficiency of bottom rock, so as to improve the efficiency of breaking rock of drill bit.

3rd, the rotation axiss of this patent wheel disc make steering wheel disc have orientation self-regulated with respect to the rotational axis offset of steering base Section adaptation function, the direction that wheel disc gear ring is moved all the time along the relative shaft bottom of wheel disc rolls, and this can significantly reduce drill bit broken rock Horizontal out-of-balance force and bit operation moment of torsion during work, therefore this patent can improve the drilling orientation controllability and instrument of drill bit Face stability, strengthens the steering capability of drill bit, improves drilling efficiency of the drill bit in directional well drilling.

Alternatively, the wheel disc rotation axiss for turning to wheel disc are more than 5mm with respect to the offset distance of the rotation axiss of steering base, little In drill bit radius and the difference of wheel disc gear ring radius.In the program, to enable steering wheel disc smoothly to rotate when working to correct rolling Dynamic direction, and good rolling orientation is kept, the rotation axiss of wheel disc are with respect to the offset distance between the rotation axiss of steering base not Can be too little, offset distance is more big more is easy to turn to the smooth rotation of wheel disc, orders about deflecting roller and spiral going to the driving force of normal orientation Also will be more sufficient, also more it is easy to ensure that turning to wheel disc can keep good rolling orientation during drill bit compound movement.But offset Away from can not be too big, too big offset distance will make steering wheel disc occupy larger revolution space, cause the waste in drill bit space.

Alternatively, the wheel disc gear ring tip circle for turning to wheel disc is coplanar with the rotation axiss of steering base.In the program, wheel disc Gear ring tip circle is coplanar with the rotation axiss of steering base, lateral sliding occurs when can be less or avoiding wheel disc gear ring rolling broken-rock and scrapes Cut, reduce the abrasion of wheel disc gear ring, lose and damaged with flow etc..

Alternatively, it is 1-6 to turn to the gear ring on the wheel disc of wheel disc.It can be 1 to turn to the gear ring on the wheel disc of wheel disc It is individual, or it is multiple, the quantity of wheel disc upper ring gear can be set according to bit size, wheel disc size.As further selection, Gear ring on wheel disc is 1,2 or 3.

When the gear ring on wheel disc is multiple, wheel disc gear ring radius（Or diameter）Refer to the gear ring top of maximum gear ring on wheel disc Round radius（Or diameter）.

Alternatively, connected by axle between wheel disc and steering base, connected to rotate between axle and wheel disc.Alternatively, To be fixedly connected or axle and wheel disc are integral type structure between axle and wheel disc, to rotate connection between axle and steering base.As choosing Select, be rotation connection between axle and steering base to rotate connection between axle and wheel disc.

Alternatively, restricted deflecting roller disk is set between steering base and bit body on steering base rotation axiss direction The locking mechanism of motion.Turn to wheel disc to be arranged on bit body by steering base, form rotation with bit body and be connected, be anti-rotation stop Come off along the direction play of steering base rotation axiss or along axis to wheel disc, can be between the steering base and bit body that turn to wheel disc Locking mechanism is set, strengthens the reliability and safety for turning to wheel disc.Here locking refers to that will turn to wheel disc revolves along steering base The direction of shaft axis is spacing, prevents from turning to wheel disc along the direction play of steering base rotation axiss or comes off, and is not intended to limit deflecting roller Rotation of the disk relative to bit body.

As further selection, locked using ball between steering base and bit body.Ball locking can as far as possible reduce shadow While ringing deflecting roller disc spins and move, can realize steering wheel disc along steering base rotation axiss direction is spacing and axial locking, And be easy to process.

Alternatively, sealing structure is provided between steering base and bit body.Drilling fluid, landwaste etc. are in during bit operation In environment, turning to wheel disc can rotate relative to bit body, and the steering base and bit body of wheel disc are turned to prevent other materials from entering Sealing structure can be set between revolute between steering base and bit body, to reduce the abrasion of revolute, extend revolute Service life.

Alternatively, the gear ring surface on wheel disc is covered with wearing layer.Wearing layer can increase the case hardness of gear ring and wear-resisting Property, wearing layer can be strengthened for antifriction alloy, hard alloy abrasion-resistant layer, diamond etc..

Alternatively, the gear ring on wheel disc is the gear ring that inlaid solid or solid welding cutting tooth is formed.Inlaid solid or solid welding cutting Tooth can be hard-metal insert, polycrystal diamond composite teeth, impregnated diamond tooth（Block）, cubic boron, ceramic tooth or glomerocryst Composite teeth that diamond is mutually composited with impregnated diamond etc..Formed using the cutting tooth that above-mentioned hardness is high, wearability is strong Gear ring, can improve the hardness and wearability of wheel disc gear ring, extend wheel disc and drilling life of bit.The tooth that inlaid solid cutting tooth is formed Circle, can stay a small amount of gap between cutting tooth and cutting tooth, to guarantee the inlaid solid intensity of cutting tooth, cutting tooth forms more continuous circle Disk gear ring.

Alternatively, PDC stationary cutting structures are become in the fixed cutting on bit body.Consolidating on PDC stationary cutting structures Determine PDC teeth to scrape butt formula fractured rock, turn to wheel disc fractured rock in the way of rolling compaction.PDC teeth are scraped and cut through before rock Carry be PDC teeth can effective wedging formation rock, turn to wheel disc and force catalase using big contact stress, to bottom rock shape Crush into flute profile and advance damage, this is conducive to PDC tooth wedging rocks, reduce PDC tooth wedging rocks and scrape the power consumption for cutting rock. PDC teeth shaft bottom scrape cut out annular scrape grooving and phacolith, be conducive to turning to rock when wheel disc rolling is ground occur to damage and it is broken collapse, Scrape the alternate shaft bottom of grooving and phacolith be also beneficial to wheel disc rolling grind after crackle generation and expansion prolong.Particularly when drill bit generation can not The vibration for avoiding（Oscillation crosswise）When, the scraping of PDC teeth cuts through broken trace grinds broken trace and will intersect with the rolling for turning to wheel disc, more has Beneficial to the broken of bottom rock.Therefore, the broken rock that PDC stationary cutting structures effectively improve drill bit with steering wheel disc phase recombination energy is imitated Rate.

Alternatively, the on-fixed cutting structure on bit body is gear wheel, dise knife or impact cutting structure etc..Turn to wheel disc Mutually it is combined with gear wheel, dise knife or the impact on-fixed cutting structure such as cutting structure, the various different broken of complexity can be formed in shaft bottom The symphyogenetic broken and shaft bottom pattern of rock mode, is conducive to improving the efficiency of breaking rock of composite drill bit.

The dise knife that this patent is mentioned refers to the dise knife with larger deviation angle, the scope of the deviation angle of the dise knife on bit body It is 20~90 ° or -90~-20 °.

Alternatively, steering wheel disc, stationary cutting structure and on-fixed cutting structure are provided with bit body simultaneously.

Aforementioned main formula case of the present invention and its each further selection scheme can be with independent assortment to form multiple schemes The present invention can be adopted and claimed scheme；And the present invention,（Each non conflicting is selected）It is selected between selection and with other Between can also independent assortment.Those skilled in the art can understand after the present invention program is understood according to prior art and common knowledge There is multiple combination, be claimed technical scheme of the invention, here does not do exhaustion.

Description of the drawings

Fig. 1, Fig. 2 are the structural representation of the embodiment of the present invention 1.

Fig. 3, Fig. 4 are the steering wheeling disk structure schematic diagram of the embodiment of the present invention 1.

Fig. 5 is the structural representation for arranging stepped axle journal shape for the steering base of the steering wheel disc of the embodiment of the present invention 1.

Fig. 6 is cylindrical structural representation for the steering base of the steering wheel disc of the embodiment of the present invention 1.

Fig. 7 is the structural representation that the gear ring on the wheel disc of the embodiment of the present invention 2 is 2.

Fig. 8 is tied to be provided with locking mechanism and sealing between the embodiment of the present invention 4, the steering base of embodiment 5 and bit body The structural representation of structure.

In figure：1st, bit body, 21, wheel disc, 211, wheel disc gear ring, 22, steering base, 23, the rotation axiss of wheel disc, 24, turn To the rotation axiss of seat, 3, sealing structure, 4, locking mechanism, 5, stationary cutting structure, 51, fixed cutting tooth.

Specific embodiment

Following non-limiting examples are used to illustrate the present invention.

Embodiment 1：

With reference to shown in Fig. 1-6, a kind of composite drill bit with steering wheel disc, including bit body 1, wheel disc 21, on wheel disc 21 Gear ring 211 is provided with, wheel disc 21 can be rotated relative to bit body 1, and bit body 1 is provided with least one steering wheel disc, turn to wheel disc It is made up of wheel disc 21 and steering base 22, steering base 22 is arranged on bit body 1 by rotating connection, the relative bit body of steering base 22 1 can rotate, and wheel disc 21 is arranged on steering base 22 by rotating connection, and wheel disc 21 can rotate relative to steering base 22.Alternatively, As shown in this embodiment, the hole for accommodating the steering base 22 that matching turns to wheel disc is correspondingly provided with bit body 1, steering base 22 enters in hole Rotate on bit body 1.Steering base 22 can have various ways, and such as Fig. 3,5 steering bases 22 to turn to wheel disc are to be provided with The axle journal shape of ladder, Fig. 6,7 steering bases 22 to turn to wheel disc are cylindrical, the relative steering base 22 of rotation axiss 23 of wheel disc 21 Rotation axiss 24 offset（See the offset distance S of Fig. 3, Fig. 4）, and offset distance S more than the radius of wheel disc gear ring 211 20/ One, less than three times of the diameter of wheel disc gear ring 211；Near the rotation axiss 24 and brill of the steering base 22 of the steering wheel disc of drill bit center portion Head axis is misaligned.Alternatively, the offset distance S of the rotation axiss 24 of the relative steering base 22 of the rotation axiss 23 of wheel disc 21 is more than 5mm, less than drill bit radius and the difference of the radius of wheel disc gear ring 211.Alternatively, the surface of gear ring 211 on wheel disc 21 is covered with wear-resisting Layer, wearing layer can be antifriction alloy, hard alloy abrasion-resistant layer, diamond reinforcement etc..Alternatively, the gear ring on wheel disc 21 211 is the disk shaped ring gear that inlaid solid or solid welding cutting tooth is formed.Inlaid solid or solid welding cutting tooth can be hard-metal insert, gather Diamond composite teeth, impregnated diamond tooth（Block）, cubic boron, ceramic tooth or polycrystalline diamond and impregnated diamond phase Composite teeth being composited etc..Stationary cutting structure 5 or on-fixed cutting structure are additionally provided with bit body 1.Alternatively, bore Fixed cutting knot 5 on head body 1 is PDC stationary cutting structures（As Fig. 1,2）.Alternatively, the on-fixed cutting on bit body 1 Structure is gear wheel, dise knife or impact cutting structure, or while has above-mentioned on-fixed cutting structure.Alternatively, it is same on bit body 1 When be provided with steering wheel disc, stationary cutting structure 5 and on-fixed cutting structure.Alternatively, turn on the wheel disc 21 of wheel disc Gear ring 211 is 1-6.It can be 1 to turn to the gear ring 211 on the wheel disc 21 of wheel disc（Such as Fig. 1,2,4,5,6）, or it is many Individual, the gear ring such as on Fig. 7 wheel discs 21 is 2.When gear ring 211 on wheel disc 21 is 1, the top of the gear ring 211 of preferred wheel disc 21 Circle is coplanar with the rotation axiss 24 of steering base 22.When gear ring 211 is multiple, preferred gear ring 211 rotates against axis 24 or so Uniformly.

Embodiment 2：

The present embodiment is substantially the same manner as Example 1, and its difference is：Connected by axle between wheel disc 21 and steering base 22, Connect to rotate between axle and wheel disc 21.Or, to be fixedly connected or axle and wheel disc are integral type structure, axle between axle and wheel disc 21 It is connected to rotate between steering base 22.Or, being the company of rotation between axle and steering base 22 to rotate connection between axle and wheel disc 21 Connect.

Embodiment 3：

The present embodiment is substantially the same manner as Example 1, and its difference is：Arrange restricted between steering base 22 and bit body 1 Turn to the locking mechanism 4 of motion of the wheel disc on the direction of 22 rotation axiss of steering base 24.Can set between steering base 22 and bit body 1 Elastic collar structure is put, in case rotation stop comes off to wheel disc along the direction play of the rotation axiss 24 of steering base 22 or along axis；Turn It is by nut that steering base 22 is spacing in the steering bore of bit body 1 to structure can be threaded between seat 22 and bit body 1 Prevent from turning to wheel disc along the direction play of rotation axiss 24 or come off.As further selection, between steering base 22 and bit body 1 Locked using ball（Such as Fig. 8）.

Embodiment 4：

The present embodiment is substantially the same manner as Example 1, and its difference is：Sealing is provided between steering base 22 and bit body 1 Structure 3（Such as Fig. 8）.

Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.

Claims (10)

1. a kind of with the composite drill bit for turning to wheel disc, including bit body, wheel disc, gear ring is provided with wheel disc, wheel disc can be relative Bit body is rotated, it is characterised in that：Bit body is provided with least one steering wheel disc, turns to wheel disc by wheel disc and steering base group Into steering base is arranged on bit body by rotating connection, and steering base rotates relative to drill bit physical ability, and wheel disc is by rotating connection peace It is mounted on steering base, wheel disc can offset relative to steering base rotation, the rotation axiss of wheel disc with respect to the rotation axiss of steering base, and Offset distance is more than 1st/20th of wheel disc gear ring radius, less than three times of wheel disc diameter ring gear, near the steering of drill bit center portion The rotation axiss of the steering base of wheel disc are misaligned with drill axis, stationary cutting structure is additionally provided with bit body or on-fixed is cut Cut structure.

2. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：Turn to the wheel disc spins of wheel disc Axis is more than 5mm with respect to the offset distance of the rotation axiss of steering base, less than drill bit radius and the difference of wheel disc gear ring radius.

3. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：Turn to the wheel disc gear ring of wheel disc Tip circle is coplanar with the rotation axiss of steering base.

4. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：Turn on the wheel disc of wheel disc Gear ring is 1-6.

5. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：Lead between wheel disc and steering base Axle connection is crossed, is connected to rotate between axle and wheel disc；Or to be fixedly connected or axle and wheel disc are integral type knot between axle and wheel disc Structure, connects between axle and steering base to rotate.

6. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：Between steering base and bit body The locking mechanism of motion of the restricted deflecting roller disk on steering base rotation axiss direction is set.

7. according to claim 6 with the composite drill bit for turning to wheel disc, it is characterised in that：Between steering base and bit body Locked using ball.

8. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：Between steering base and bit body It is provided with sealing structure.

9. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：Fixed cutting on bit body Become PDC stationary cutting structures.

10. according to claim 1 with the composite drill bit for turning to wheel disc, it is characterised in that：On-fixed on bit body Cutting structure is gear wheel, dise knife or impact cutting structure.