CN207553975U - A kind of axial thrust roller type righting drill bit - Google Patents
A kind of axial thrust roller type righting drill bit Download PDFInfo
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- CN207553975U CN207553975U CN201721711758.1U CN201721711758U CN207553975U CN 207553975 U CN207553975 U CN 207553975U CN 201721711758 U CN201721711758 U CN 201721711758U CN 207553975 U CN207553975 U CN 207553975U
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- idler wheel
- drill bit
- thrust
- roller type
- drill
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Abstract
The utility model is related to a kind of axial thrust roller type righting drill bits, belong to bit technique field, and including drill main body, one end of the drill main body is circumferentially arranged multiple wings, and each wing is respectively connected with gauge block, it is characterised in that：The gauge block is equipped with the groove of opening outwardly, roller wheel shaft is fixed in groove, the thrust idler wheel for being provided with protrusion gauge block is rotated on roller wheel shaft, thrust idler wheel deflects setting along the peripheral, oblique of drill main body, direction is deflected as axial left-handed rotation direction, and the busbar of thrust idler wheel is camber line.The beneficial effects of the utility model are：Thrust idler wheel can generate an axial thrust load during drilling well, can improve bit pressure, effectively reduce de- pressure phenomenon, drill bit is pushed to creep into forward, improves drilling efficiency；Increase the contact width between thrust idler wheel and the borehole wall, increase the circumferential stability of drill bit, effectively reduce drill bit and generate oscillation crosswise.
Description
Technical field
The utility model is related to bit technique fields, more particularly to a kind of axial thrust roller type righting drill bit, are applicable in
In brill high angle hole horizontal well etc..
Background technology
In drilling process, drill bit is the main tool of fractured rock, and wellbore is formed by drill bit fractured rock, is bored
Whether head adapts to the quality of rock property and its quality, plays very important effect in terms of drilling technology is selected, particularly
Tremendous influence is generated in terms of to drilling quality, drilling rate, drilling cost.The reasonable selection of drill bit is to improving drilling speed
Degree, reduction drilling well synthesis cost play an important role.It is higher and higher to the performance requirement of drill bit in oil, geology field, it bores
During well, the direction of rotation of drill bit is seen as rotating clockwise from top to bottom, in order to inhibit the oscillation crosswise of drill bit, employs guarantor
Gauge structure, and the structure for reducing friction is employed, but gauge structure sets or is vertically arranged for dextrorotation rotation direction, it is particularly big in brill
Wells horizontal well etc., not enough there is de- pressure phenomenon in Chang Yinwei bit pressures in drilling process, lead to that bit speed is slow, efficiency is low.
Utility model content
In order to solve the above technical problems, the technical solution that the utility model uses is：A kind of axial thrust rolling is provided
Wheeled righting drill bit.
The purpose of this utility model is achieved through the following technical solutions：A kind of axial thrust roller type righting is bored
Head, including drill main body, one end of the drill main body is circumferentially arranged multiple wings, and each wing is respectively connected with gauge block,
It is characterized in that：The gauge block is equipped with the groove of opening outwardly, is fixed with roller wheel shaft in groove, is rotated on roller wheel shaft
The thrust idler wheel of protrusion gauge block is provided with, thrust idler wheel deflects setting along the peripheral, oblique of drill main body, and deflection direction is
Axial left-handed rotation direction, and the busbar of thrust idler wheel is camber line.
Preferably, the angle between the center line of the thrust idler wheel and the axis of drill main body is 1 °~30 °.
Preferably, the thrust idler wheel both ends of the surface offer seal groove, are provided in seal groove and are resisted against recess sidewall
Sealing ring.
Preferably, the described one end of gauge block far from wing offers countersunk head through-hole, and the other end offers tapped blind hole, rolling
One end of wheel shaft is bolted in tapped blind hole, and the other end is equipped with the hexagon socket head portion being adapted to countersunk head through-hole.
Preferably, the periphery of the thrust idler wheel protrudes from gauge block 0.3mm~1.2mm in the radial direction of drill bit.
Preferably, the surface of the thrust idler wheel is equipped with annular groove.
Preferably, the drill main body is connector with respect to one end of wing, and connector is equipped with external thread part, and arranges useful
In the breaker slot of bit trips.
Preferably, multiple cutting tooths are fixed on the cutting edge of the wing, are equipped with chip space, chip removal between wing two-by-two
Nozzle is provided on slot, the runner connected with nozzle is equipped among drill body.
Preferably, the cutting tooth is composite polycrystal-diamond or natural diamond or impregnated Adamas cutting tooth or hard
Matter carbide button.
The beneficial effects of the utility model are：
First, rolling body is tilted a certain angle installation with drill bit shaft to left-handed.Rolling body in rolling process, makes on the borehole wall
Drill bit generates a forward axial thrust load, can improve bit pressure, reduces de- pressure phenomenon, drill bit is pushed to creep into forward, improves and bores
Well efficiency, suitable for boring high angle hole horizontal well etc..
2nd, during drill bit drilling well, thrust idler wheel is contacted with the borehole wall, plays the role of gauge, and single thrust idler wheel and the borehole wall it
Between contact line be a camber line, increase contact width of the thrust idler wheel between the borehole wall, increase drill bit circumferential direction stablize
Property, drill bit is effectively avoided to generate oscillation crosswise；
3rd, thrust idler wheel in rolling process, can generate frictional force with the borehole wall, be between thrust idler wheel and the borehole wall on the borehole wall
Rolling friction can reduce frictional resistance, so as to improve the service life of drill bit and drilling efficiency.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the vertical view of Fig. 1；
Fig. 3 is the structure diagram of gauge block and thrust idler wheel；
The stress diagram of thrust idler wheel when Fig. 4 is work；
Fig. 5 contacts perspective view for thrust idler wheel with the borehole wall；
In figure：1- drill main bodies, 2- wings, 3- gauge blocks, 4- roller wheel shafts, 5- thrust idler wheels, 6- breaker slots, 7- cuttings
Tooth, 8- chip spaces, 9- nozzles, 10- runners, 11- sealing rings, the 12- boreholes wall, 13- helixes.
Specific embodiment
The utility model is further described below, but the scope of protection of the utility model is not limited to following institute
It states.
As shown in Figures 1 to 5, a kind of axial thrust roller type righting drill bit, including drill main body 1, the drill main body 1
One end it is circumferentially arranged have multiple wings 2, each wing 2 is respectively connected with gauge block 3, it is characterised in that：It is set on the gauge block 3
There is the groove of opening outwardly, roller wheel shaft 4 is fixed in groove, the thrust for being provided with protrusion gauge block 3 is rotated on roller wheel shaft 4
Idler wheel 5, thrust idler wheel 5 are set along the peripheral, oblique of drill main body 1, and deflection direction is axially left-handed rotation direction, and thrust idler wheel 5
The busbar of outer circle is camber line.
Such as Fig. 3, the busbar of 5 outer circle of thrust idler wheel is the camber line contacted always with the borehole wall 12, and camber line outwardly protrudes, and and well
Wall is adapted so that whole busbar of single thrust idler wheel 5 contacts always with the borehole wall 12, increase thrust idler wheel 5 with the borehole wall
Contact width between 12, increases frictional force, increases the circumferential stability of drill bit, and the axial direction improved in drilling process pushes away
Power pressure effect.
Thrust idler wheel 5 in rolling process, can generate frictional force, thrust idler wheel 5 and the borehole wall 12 on the borehole wall 12 with the borehole wall 12
Between for rolling friction, frictional resistance can be reduced, so as to improve the service life of drill bit and drilling efficiency, in order to improve thrust rolling
The service life of wheel 5 increases wearing layer, such as in surface spraying weld hard alloy layer, roller wheel shaft 4 on the surface of thrust idler wheel 5
Using the steel alloy of high intensity, in order to reduce the frictional force between thrust idler wheel 5 and roller wheel shaft 4, can install therebetween
Rolling bearing.
Such as Fig. 4, the stress diagram of thrust idler wheel 5 in drilling process is shown, drill bit during in order to clearly show that work
The annular groove of thrust idler wheel 5 is not shown in stress, and V represents drill bit rate of penetration, V in figure1Represent bit angular speed, V2It represents
5 angular velocity of rotation of thrust idler wheel, F1Represent tangential component of the thrust idler wheel 5 by frictional force, F2Represent that thrust idler wheel 5 is rubbed
The axial thrust load of power is wiped, F ＇ represent F1And F2Resultant force reaction force, that is to say the power being added on drill main body 1, bit operation
When be along V1It rotates clockwise, 5 left-handed setting of thrust idler wheel, F ＇ can generate one and F2Point equal in magnitude, direction is opposite
Power so can generate an axial force in drilling process, plays pressurization, effectively avoids the de- pressure occurred in drilling process
Phenomenon improves drilling efficiency, and conventional gauge block 3 is dextrorotation or is vertically arranged, and will not generate the axial thrust load.
Such as Fig. 5, show that the contact with the borehole wall 12 of thrust idler wheel 5 projects, A, B represent helix 13 and thrust idler wheel respectively
5 projection intersection point, helix 13 be a helix along the borehole wall 12, A0、B0The downward projection of thrust idler wheel 5 is represented respectively
Center, A ＇, B ＇ represent the downward projection of A points and B points respectively；It is seen that A ＇ and B ＇ is on the borehole wall 12, thrust idler wheel
5 with 12 contact portion of the borehole wall be helix 13 one section of camber line, from downward projection it can be seen that thrust idler wheel 5 whole busbar
It is all contacted with the borehole wall, increases contact width of the thrust idler wheel 5 between the borehole wall 12, increase the circumferential stability of drill bit,
Drill bit is effectively avoided to generate oscillation crosswise.
Angle between the center line of the thrust idler wheel 5 and the axis of drill main body 1 is 1 °~30 °.
5 both ends of the surface of thrust idler wheel offer seal groove, and the sealing for being resisted against recess sidewall is provided in seal groove
Circle 11, seals, frequently with O-shaped rubber seal, drill bit is immersed in mud in drilling process, and sealing ring 11 can stop
Mud enters in thrust idler wheel 5, avoids thrust idler wheel 5 stuck, ensures the 5 smooth rotation of thrust idler wheel.
Such as Fig. 3, the described one end of gauge block 3 far from wing 2 offers countersunk head through-hole, and the other end offers tapped blind hole,
One end of roller wheel shaft 4 is bolted in tapped blind hole, and the other end is equipped with the hexagon socket head portion being adapted to countersunk head through-hole, roller wheel shaft
To be detachably connected between 4 and gauge block 3, maintain easily and replace, roller wheel shaft 4 is loosened and come off in order to prevent, in countersunk head
The lock washer being positioned in through-hole between roller wheel shaft 4 and gauge block 3.
The periphery of the thrust idler wheel protrudes from gauge block 0.3mm~1.2mm in the radial direction of drill bit.
The surface of the thrust idler wheel 5 is equipped with annular groove, can be used spiral helicine annular groove, the section of spiral annular groove it is trapezoidal or
Triangle, it is possible to increase the frictional force between thrust idler wheel 5 and the borehole wall 12 avoids thrust idler wheel 5 from skidding.
The drill main body 1 is connector with respect to one end of wing 2, and connector is equipped with external thread part, and is disposed with to bore
The breaker slot 6 of head handling, connector is connect with drill rod thread, and breaker slot 6 facilitates the tools clamping such as clamp.
Multiple cutting tooths 7 are fixed on the cutting edge of the wing 2, cutting tooth 7 is for composite polycrystal-diamond or naturally
Diamond or impregnated Adamas cutting tooth or hard-metal insert are equipped with chip space 8, are provided on chip space 8 two-by-two between wing 2
Nozzle 9, drill body centre are equipped with the runner 10 connected with nozzle 9, pass through 9 jet drilling well liquid of nozzle.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, there can be various modifications and variations in the spirit and principles of the utility model, these are equivalent
Modification or replacement etc., are all contained within the scope of protection of the utility model.
Claims (9)
1. a kind of axial thrust roller type righting drill bit, including drill main body, one end of the drill main body is circumferentially arranged to be had
Multiple wings, each wing are respectively connected with gauge block, it is characterised in that：The gauge block is equipped with the groove of opening outwardly, groove
Roller wheel shaft is inside fixed with, rotates the thrust idler wheel for being provided with protrusion gauge block on roller wheel shaft, thrust idler wheel is along drill bit master
The peripheral, oblique deflection setting of body, deflection direction is axial left-handed rotation direction, and the busbar of thrust idler wheel is camber line.
2. axial thrust roller type righting drill bit according to claim 1, it is characterised in that：The center of the thrust idler wheel
Angle between line and the axis of drill main body is 1 °~30 °.
3. axial thrust roller type righting drill bit according to claim 1, it is characterised in that：The thrust idler wheel both ends of the surface
Seal groove is offered, the sealing ring for being resisted against recess sidewall is provided in seal groove.
4. axial thrust roller type righting drill bit according to claim 1, it is characterised in that：The gauge block is far from wing
One end offer countersunk head through-hole, the other end offers tapped blind hole, and one end of roller wheel shaft is bolted in tapped blind hole, another
End is equipped with the hexagon socket head portion being adapted to countersunk head through-hole.
5. axial thrust roller type righting drill bit according to claim 1, it is characterised in that：The outer circle of the thrust idler wheel
Face protrudes from gauge block 0.3mm~1.2mm in the radial direction of drill bit.
6. the axial thrust roller type righting drill bit according to Claims 1 to 5 any one, it is characterised in that：It is described to push away
The surface of power idler wheel is equipped with annular groove.
7. axial thrust roller type righting drill bit according to claim 6, it is characterised in that：The drill main body is with respect to knife
One end of the wing is connector, and connector is equipped with external thread part, and is disposed with the breaker slot for bit trips.
8. axial thrust roller type righting drill bit according to claim 6, it is characterised in that：On the cutting edge of the wing
Be fixed with multiple cutting tooths, be equipped with chip space between wing two-by-two, nozzle is provided on chip space, be equipped among drill body with
The runner of nozzle connection.
9. axial thrust roller type righting drill bit according to claim 8, it is characterised in that：The cutting tooth is glomerocryst gold
Hard rock composite sheet or natural diamond or impregnated Adamas cutting tooth or hard-metal insert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721711758.1U CN207553975U (en) | 2017-12-11 | 2017-12-11 | A kind of axial thrust roller type righting drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721711758.1U CN207553975U (en) | 2017-12-11 | 2017-12-11 | A kind of axial thrust roller type righting drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207553975U true CN207553975U (en) | 2018-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721711758.1U Active CN207553975U (en) | 2017-12-11 | 2017-12-11 | A kind of axial thrust roller type righting drill bit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882511A (en) * | 2017-12-11 | 2018-04-06 | 四川深远石油钻井工具股份有限公司 | A kind of axial thrust roller type righting drill bit |
-
2017
- 2017-12-11 CN CN201721711758.1U patent/CN207553975U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107882511A (en) * | 2017-12-11 | 2018-04-06 | 四川深远石油钻井工具股份有限公司 | A kind of axial thrust roller type righting drill bit |
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