CN107313720A - A kind of interior impact grinding formula PDC composite drill bits - Google Patents
A kind of interior impact grinding formula PDC composite drill bits Download PDFInfo
- Publication number
- CN107313720A CN107313720A CN201710692100.9A CN201710692100A CN107313720A CN 107313720 A CN107313720 A CN 107313720A CN 201710692100 A CN201710692100 A CN 201710692100A CN 107313720 A CN107313720 A CN 107313720A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- broken
- bit
- wing
- bit body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/003—Bearing, sealing, lubricating details
Abstract
The present invention provides a kind of interior impact grinding formula PDC composite drill bits, it is related to oil drilling drilling tool technical field, including bit body and the wing being installed on bit body, the wing is provided with several Cutters, the bit body center portion is arranged with the actuating unit that the broken drill bit being detachably connected with bit body and the broken drill bit of driving are rotated, and the actuating unit is fixedly connected with the broken drill bit；Rolling composite bearing is provided between the bit body and the broken drill bit.By implementing the technical program, the efficiency of breaking rock of drill bit center portion can be effectively effectively improved, PDC drill bit has been broken through in the technical barrier for being difficult to creep into compared with hard formation；And faster abrasion will not be caused to the bit body for crushing bit body periphery, be conducive to improving the service life of drill bit, save drilling cost.
Description
Technical field
The present invention relates to oil drilling drilling tool technical field, more particularly to a kind of interior impact grinding formula PDC composite drill bits.
Background technology
Drill bit be in drilling engineering to fractured rock, form the rock crushing tool of pit shaft.Now used in drilling engineering
Conventional bit mainly there is tricone bit, polycrystalline diamond compact bit (i.e. PDC drill bit) and percussion bit (also referred to as to spin
Drill bit or bore bit) etc..
PDC drill bit is that one kind is cut or shear action broken rock using composite polycrystal-diamond (i.e. PDC teeth) to scraping for rock
Drill bit.The prominent superiority due to possessing in terms of cutting element performance and broken rock mode, thus PDC drill bit it is soft extremely
The efficiency of breaking rock of medium ground is apparently higher than tricone bit.Now, PDC drill bit uses more and more in drilling engineering,
Ratio is increasing, but for the high stratum of hardness, abrasiveness and serious inhomogeneous stratum, PDC drill bit is still difficult in adapt to.
Existing PDC drill bit belongs to fixed cutter drill bits, as the composite polycrystal-diamond (i.e. PDC teeth) of cutting element according to one
Fixed rule is arranged and is fixedly arranged on drill body, constitutes the cutting structure of PDC drill bit fractured rock.In preferable condition of work
It is phase that each cutting tooth, which is responsible for broken region, under (condition that i.e. center line of bit is overlapped with hole axis), when drill bit is crept into
To fixed donut band.
When PDC drill bit is being crept into compared with hard formation, PDC drill bit head is difficult to invade (wedging) bottom rock surface, especially
It is that intrusion difficulty is higher, causes drill bit to be skidded in shaft bottom, and drilling speed is extremely slow after PDC teeth occur to wear and tear to a certain degree.Thus, it is existing
Have in technology and there is following technical problem：1st, by pure shear state fractured rock, drill bit center portion cutting tooth opposite peripheral cutting tooth
Cutting linear velocity is very low, causes PDC drill bit rate of penetration slack-off, the efficiency of breaking rock of serious restriction PDC drill bit；2nd, PDC teeth are continuous
Constantly rock cutting, because the heat that severe friction is produced can make tooth reach at a relatively high temperature, when temperature exceedes maximum heat
During load, the rate of wear of PDC teeth substantially rises, so as to cause the generation of thermal wear phenomenon.3rd, on the different radial zones of drill bit
PDC teeth rate of wear difference substantially, the cutting tooth in general bit exterior region (particularly outer 1/3 region of drill bit radius)
The rate of wear is significantly faster than that the cutting tooth in center portion region, and the drill bit after abrasion needs integral replacing, and cost is high.
The content of the invention
The deficiencies in the prior art, multiple it is an object of the invention to provide a kind of interior impact grinding formula PDC in view of the above
Bench drill head, can effectively improve the efficiency of breaking rock of drill bit center portion, improve the service life of drill bit, save drilling cost.
The present invention specifically uses following technical scheme to achieve these goals：
A kind of interior impact grinding formula PDC composite drill bits, including bit body and the wing being installed on bit body, the wing
Several Cutters are provided with, the bit body center portion is arranged with the broken drill bit being detachably connected with bit body and driven
The actuating unit that dynamic broken drill bit is rotated, the actuating unit is fixedly connected with the broken drill bit；The bit body with it is described
Rolling composite bearing is provided between broken drill bit.
The operation principle of base case of the present invention：The composite drill bit have bit body and with bit body be detachably connected it is broken
Broken drill bit, broken drill bit, which is connected between actuating unit, and bit body and broken drill bit, is provided with rolling composite bearing, therefore bit body
With drill bit of the broken drill bit for independent drilling；Broken drill bit is set in bit body center portion, the independent rotary drilling of broken drill bit is utilized
The mode broken rock entered, then broken rock is crept into by broken drill bit and bit body jointly, abandon and only leaned on independent drill bit in the prior art
Shearing broken rock mode but the mode crept into jointly after rock center portion is broken by two drill bits of different drilling speeds, this broken rock
Mode is avoided by single drill bit pure shear state fractured rock, causes PDC drill bit rate of penetration slack-off, and serious restriction PDC is bored
The problem of efficiency of breaking rock of head；Again by its peripheral bit body rotary drilling after the broken drill bit broken rock of bit body center portion, just
Reduce the mechanical load that PDC drill bit invades rock surface, the rate of penetration of PDC drill bit can be effectively improved, improve drill bit center portion
Efficiency of breaking rock, has broken through PDC drill bit in the technical barrier for being difficult to creep into compared with hard formation；And will not to crush bit body periphery brill
Head body causes faster abrasion, improves the service life of drill bit, saves drilling cost.
Further, the actuating unit includes drive block and screwed pipe, and the screwed pipe is located in the bit body simultaneously
It is threadedly coupled with the bit body, the drive block is arranged on the end of the screwed pipe and detachably connected with the broken drill bit
Connect.Beneficial effect：Screwed pipe is located in bit body and is threadedly coupled with bit body, and stable connection is safe and reliable；Spiral shell can be passed through
The broken drill bit of rotary drilling driving of line pipe is rotated, and the broken drive block set between drill bit and screwed pipe increases broken drill bit
With the connection area of actuating unit, supporting ＆ stablizing, and dismountable connected mode is convenient only needs to change after broken bit wear
Broken drill bit and the cost for having saved the peripheral bit body of broken drill bit, it is cost-effective.
Further, the drilling area overlay area of the broken drill bit accounts for the 35%- of the drilling area overlay area of the bit body
55%.Beneficial effect：Ensure broken drill bit mechanical stiffness, it is to avoid the cutting tooth quilt of the drill bit body region of broken drill bit outer peripheral areas
Can Fast Wearing, raising broken rock drilling efficiency.
Further, the rolling composite bearing includes interior revolving body, external gyrorotor and by interior revolving body and external gyrorotor
Several rolling elements are provided with the annular rolling groove of formation, the annular rolling groove, several described rolling elements are rolled along annular
Groove is circumferentially angularly uniformly distributed, and support slipper is provided between adjacent rolling elements.Beneficial effect：Inside and outside rolling composite bearing
Set support slipper that the rolling composite bearing can be made to bear higher load and rotating speed in annular rolling groove between revolving body, fit
Close the demand of broken drill bit and bit body high-speed overload.
Further, it is provided with the support slipper in hollow cavity, the hollow cavity and is filled with low-melting-point metal, the rolling
The interior revolving body of composite bearing uses copper or aluminum alloy materials with the material of the support slipper.Beneficial effect：Composite drill bit
Before drilling, the low-melting-point metal in hollow cavity is at normal temperatures solid state, is easy to the broken bit of actuating unit driving to break
Rock is crept into, and in drilling process, because composite drill bit constantly creeps into rock cutting, the heat that severe friction is produced can be by low melting point
Metal absorption, reduces the temperature of composite drill bit, reduces drill bit thermic load, it is to avoid the generation of thermal wear phenomenon；And absorb big calorimetric
The low-melting-point metal of amount is changed into liquid process expansion of absorbing heat from solid, and volume becomes big, and the interior revolving body of rolling composite bearing
It is made with the side wall of support slipper of copper pipe or aluminium-alloy pipe, at high temperature with preferable ductility, so as to support cunning
After block expanded by heating can by the interior revolving body of rolling composite bearing inwardly with broken drill bit even at the cost of one's life so that broken drill bit and bit body
Crept into as the cooperation of the high rotating speed of integral structure, thump, the drilling efficiency of composite drill bit can be effectively improved.
Further, the wing includes the operator wing and secondary wing, and the operator wing and secondary wing are in Archimedes spiral
It is installed on bit body.Beneficial effect：Cutting tooth on the operator wing and secondary wing is cut to seat rock is scraped, and space is formed in shaft bottom
Curve, which is scraped, cuts track, and the operator wing and secondary wing in Archimedes spiral are more beneficial for cutting tooth and scraped to cut through broken seat rock,
Improve the drilling efficiency of drill bit.
Further, the quantity of the operator wing and secondary wing is three, the operator wing along the circumferential uniform of bit body,
The secondary wing is arranged at intervals along the circumferential uniform of bit body and with the operator wing.Beneficial effect：The operator wing and secondary wing shape
Scrape and cut into complicated cross network, scrape cut channel mark for two sets and be easier to the broken of rock, be adapted to compared with hardcore or heterogeneity bottom,
Improve the drilling efficiency of drill bit.
Further, the cutting contoured surface of the broken drill bit is in spherical crown surface, and the radian of spherical crown surface is π/3.Beneficial effect：
Ensure broken stiffness of twist drill, reach the effect of quick broken rock.
Further, the cutting contoured surface of the bit body is in spherical crown surface, and the centre of sphere of the broken bit cutting contoured surface
The centre of sphere for cutting contoured surface with the bit body is overlapped.Beneficial effect：Stability, the guidance quality and controllable of drilling of drill bit drilling
Property is more preferable.
Further, the broken drill bit is provided with broken Cutter and damping tooth, the broken Cutter edge
The drilling area of broken drill bit is radially linearly angularly distributed, the damping tooth and the spaced setting of the cutting tooth.Have
Beneficial effect：The material of broken Cutter and damping tooth uses polycrystalline diamond composite material, using broken bit cutting
Radially linearly angularly distribution can linearly rock cutting, the cutting of raising drill bit center portion for drilling area of the tooth along broken drill bit
Breaking capacity, and damping tooth can improve the stability of drill bit drilling with the spaced setting of broken Cutter
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, bit body center portion of the present invention is provided with built-in detachably broken drill bit, and is set between broken drill bit and outside bit body
Rolling composite bearing is equipped with, so that broken drill bit creeps into mode with outside drill bit to rotate independently of one another broken rock, drill bit is improved
The efficiency of breaking rock of center portion, reduces the resistance that outside bit body broken rock is subject to, it is easier to invade rock surface, improves efficiency of breaking rock
While, the service life of composite drill bit can be extended, and can break through compared with hard formation；Therefore, this broken rock mode avoids existing
The pure shear state fractured rock of single drill bit is leaned in technology, causes PDC drill bit center portion rate of penetration slower, seriously restricts PDC
The problem of efficiency of breaking rock of drill bit.
2nd, the broken drill bit in the present invention can drive broken drill bit to rotate by single actuating unit, and actuating unit includes
Drive block and screwed pipe, screwed pipe are located in bit body and are threadedly coupled with bit body, spin stabilization, can pass through screwed pipe
The broken drill bit of rotary drilling driving screw thread tube end is rotated, and the broken drive block set between drill bit and screwed pipe is increased brokenly
The connection area of broken drill bit and actuating unit, drives supporting ＆ stablizing, and dismountable connected mode is convenient in broken bit wear
It only need to change broken drill bit afterwards and save the cost of the peripheral bit body of broken drill bit, it is cost-effective.
3rd, the drilling area overlay area of broken drill bit of the invention accounts for the 35%-55% of the drilling area overlay area of bit body, no
Same rock stratum can break through rock using the different broken drill bit of area coverage, to adapt to different hardness bottom or heterogeneity bottom
Layer, and can be rock bit by built-in broken bit change-over, it is because the change space that cone structure is designed is very big, i.e., limited
Gear wheel space can be sufficiently used for cloth tooth and broken rock, it is ensured that while gear wheel intensity, improve the efficiency of breaking rock of drill bit.
4th, rolling element and branch are set in the annular rolling groove in the present invention between the interior external gyrorotor of rolling composite bearing
Sliding block is supportted, the rolling composite bearing can be made to bear higher load and rotating speed, is adapted to broken drill bit and bit body high-speed overload
Demand；Further, the phase transformation for the low-melting-point metal being provided with support slipper in hollow cavity, hollow cavity can be bored in composite drill bit broken rock
The heat that severe friction is produced is absorbed when entering, the temperature of composite drill bit is reduced, it is to avoid the generation of thermal wear phenomenon；And absorb a large amount of
The low-melting-point metal of heat is changed into liquid process expansion of absorbing heat from solid, and volume becomes big, can support broken drill bit and bit body
The stability of connection, improves the rigidity of composite drill bit compound drilling, realizes the cooperation drilling of high rotating speed, thump, improves compound
The drilling efficiency of drill bit.
5th, the wing that is arranged on bit body is divided into the operator wing and secondary wing in the present invention, the operator wing and secondary wing in Ah
Base Mead helical is installed on bit body, is conducive to cutting tooth to scrape and is cut through broken seat rock, improves the drilling efficiency of drill bit；And it is broken
Broken drill bit is provided with broken Cutter and damping tooth, crushes drilling area of the Cutter along broken drill bit radially in straight
Line is angularly distributed, damping tooth and the spaced setting of broken Cutter, can improve the breaking capacity of drill bit center portion, and subtract
Shake tooth can improve the stability of drill bit drilling with the spaced setting of cutting tooth.
Brief description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is a kind of sectional view of interior impact grinding formula PDC composite drill bit embodiments of the present invention；
Fig. 2 is a kind of schematic diagram of interior impact grinding formula PDC composite drill bit embodiment rolling composite bearings of the present invention；
Fig. 3 is a kind of schematic diagram of interior impact grinding formula PDC composite drill bits embodiment drill bit drilling area of the present invention.
Reference：1- bit bodys, 2- wings, 3- Cutters, 4- crush drill bit, 5- embedded grooves, 6- actuating units,
Returned in the annular rolling groove of 7- rolling composite bearings, 8- drive blocks, 9- screwed pipes, 10- rolling elements, 11- support slippers, 12-, 13-
Swivel, 14- external gyrorotors, 16- the operator wing, the secondary wings of 17-, 18- dampings tooth, 19- crush Cutter, 20- spray holes.
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Below by embodiment, the present invention is further detailed explanation：
Such as Fig. 1 and as indicated at 3, the present embodiment provides a kind of interior impact grinding formula PDC composite drill bits, including the He of bit body 1
With the integrally formed wing of bit body 12, wing 2 includes the operator wing 16 and secondary wing 17, and the operator wing 16 and secondary wing 17 are in
Archimedes spiral is installed on bit body 1, and the operator wing 16 and secondary wing 17 are provided with several Cutters 3, and operator
The Cutter 3 being provided between the wing 16 and secondary wing 17 on spray hole 20, the operator wing 16 and secondary wing 17 is cut to seat rock
Bit body 1 is lubricated by spraying the jet drilling well liquid of leaf hole 20 while scraping, formation space curve, which is scraped, in shaft bottom cuts track, in A Ji meter
The operator wing 16 of moral helical and secondary wing 17, which are more beneficial for Cutter 3, to be scraped and cuts through broken seat rock；The operator wing 16 and secondary knife
The quantity of the wing 17 is three, and the operator wing 16 is angularly evenly arranged on bit body 1 along the circumference of bit body 1, secondary wing 17
Angularly it is evenly arranged on bit body 1 along the circumference of bit body 1, the operator wing 16 is distributed with the secondary transpostion interval of wing 17, operator
The cross network that the wing 16 and secondary wing 17 form complexity, which is scraped, to be cut, and is scraped cut channel mark for two sets and is easier to the broken of rock, is adapted to harder bottom
Layer or heterogeneity bottom, improve the drilling efficiency of drill bit.
The center portion of bit body 1 is offered for the embedded broken embedded groove 5 of drill bit 4, and is provided with what is be detachably connected with bit body 1
Broken drill bit 4 and actuating unit 6, the size of embedded groove 5 and the size of broken drill bit 4 match, and actuating unit 6 is arranged on drill bit
It is fixedly connected in body 1 and with broken drill bit 4, the broken drill bit 4 of driving is rotated in embedded groove 5；Therefore bit body 1 and broken drill bit
4 be the independent drill bit crept into；Broken drill bit 4 is set in the center portion of bit body 1, the shearing for leaning on single drill bit in the prior art has been abandoned
Broken rock mode but drive broken drill bit 4 first invade rock surface broken rock by actuating unit 6, the offer of actuating unit 6 is provided
The mode broken rock of pulse energy independence rotary drilling, this broken rock mode is avoided by single drill bit pure shear state kata-rocks
Stone, causes PDC drill bit center portion rate of penetration slower, seriously the problem of the efficiency of breaking rock of restriction PDC drill bit.
Further, actuating unit 6 includes drive block 8 and screwed pipe 9, and screwed pipe 9 is located in bit body 1 and and bit body
1 threaded connection, can drive broken drill bit 4 to rotate, stable connection is safe and reliable by the rotary drilling of screwed pipe 9；And broken brill
The drive block 8 set between first 4 and screwed pipe 9 increases the connection area of broken drill bit 4 and actuating unit 6, supporting ＆ stablizing；Driving
Block 8 is arranged on the end of screwed pipe 9 and is detachably connected with broken drill bit 4, and the mode being detachably connected is preferably threaded connection,
Make broken drill bit 4 and the stable connection of actuating unit 6, and dismountable connected mode is conveniently only needed more after the abrasion of broken drill bit 4
Change broken drill bit 4 and save the cost of the peripheral bit body 1 of broken drill bit 4.
In addition, the drilling area overlay area of broken drill bit 4 accounts for the 35%-55% of the drilling area overlay area of bit body 1, it is ensured that broken
The broken mechanical stiffness of drill bit 4, it is to avoid the cutting tooth 3 in the broken peripheral region of bit body 1 of drill bit 4 by can Fast Wearing, improve broken rock and bore
Enter efficiency.The cutting contoured surface of broken drill bit 4 is in spherical crown surface, and spherical crown surface radian is π/3, it is ensured that the broken rigidity of drill bit 4, is reached fast
The effect of fast broken rock；The cutting contoured surface of drill bit is in spherical crown surface, and broken drill bit 4 cuts the centre of sphere and bit cutting wheel of contoured surface
The centre of sphere of profile surface is overlapped, and stability, the guidance quality of drilling and the controllability for creeping into drill bit are more preferable.Broken drill bit 4 is provided with
Broken Cutter 19 and damping tooth 18, crush drilling area of the Cutter 19 along broken drill bit 4 radially linear etc.
Angular distribution, damping tooth 18 and the spaced setting of broken Cutter 19, broken Cutter 19 and damping tooth 18
Material uses polycrystalline diamond composite material, and the drilling area using broken Cutter 19 along broken drill bit 4 is in radially
Straight line, which is angularly distributed, can improve the breaking capacity of drill bit center portion, and damping tooth 18 with broken Cutter 19 is spaced sets
The stability of drill bit drilling can be improved by putting.
Further, as shown in Fig. 2 being provided with rolling composite bearing 7, rolling composite bearing 7 between bit body 1 and broken drill bit 4
Including rolling element 10 and support slipper 11, rolling element 10 is preferably ball or roller, and rolling element 10 and support slipper 11 are being rolled
It is spaced in annular rolling groove 12 between the interior external gyrorotor 14 of composite bearing 7 to install, in rolling composite bearing 7
Set support slipper 11 that the rolling composite bearing 7 can be made to bear higher load in annular rolling groove 12 between external gyrorotor 14
And rotating speed, it is adapted to the demand of broken drill bit 4 and the high-speed overload of bit body 1.
In addition, be provided with hollow cavity in support slipper 11, be filled with low-melting-point metal in hollow cavity, low-melting-point metal be Sn or
Alloy containing Sn, interior revolving body 13 and the support slipper 11 of rolling composite bearing 7 are made of copper or aluminium alloy, support slipper
11 material can also use tpu materials, by changing the proportioning of each reactive components of TPU, can obtain the product of different hardness, from
And the mechanical strength high bearing capacities of support slipper 11 of tpu materials, impact resistance and damping performance protrude meet broken drill bit and
The demand of bit body high-speed overload, and with the increase of hardness, its product still keeps good elasticity；And the branch of tpu materials
The good seal performance of sliding block 11 is supportted, can effectively prevent the low-melting metal phase in the hollow cavity of support slipper 11 to be changed into overflowing during liquid.
Before composite drill bit drilling, the low-melting-point metal in hollow cavity is at normal temperatures solid state, is easy to the driving of actuating unit 6 broken
Drill bit 4 is rotated and broken rock is crept into, and in drilling process, because composite drill bit constantly creeps into rock cutting, what severe friction was produced
Heat can be absorbed by low-melting-point metal, reduce the temperature of composite drill bit, reduce drill bit thermic load, it is to avoid the hair of thermal wear phenomenon
It is raw；And the low-melting-point metal of absorption amount of heat is changed into liquid process expansion of absorbing heat from solid, volume becomes big, and rolling is compound
The interior revolving body 13 of bearing 7 is made of copper pipe or aluminium-alloy pipe and support slipper 11 is made of tpu materials, at high temperature
Good ductility is respectively provided with, so that can be inside by the interior revolving body 13 of rolling composite bearing 7 after the expanded by heating of support slipper 11
With broken drill bit 4 even at the cost of one's life so that broken drill bit 4 and bit body 1 are crept into as the cooperation of the high rotating speed of integral structure, thump,
The drilling efficiency of composite drill bit can be effectively improved.
In this example, when breaking through compared with hard formation, the broken drill bit 4 that the composite drill bit center portion position is set can be by dynamic
The driving rotation of force mechanisms 6, invades rock surface failure of rock rock first, is separate due to crushing drill bit 4 with outside drill bit
Broken rock drilling mode is rotated, when the driving force provided in broken drill bit 4 using actuating unit 6 independently breaks through rock surface,
Again by crushing the mode broken rock that drill bit 4 and the common rotary drilling of bit body 1 are combined, it is easy to break through rock and avoid composite drill bit
The rate of wear of perimeter Cutter 3 is faster than the rate of wear that center portion region crushes Cutter 19, extends composite drill
The service life of head, and improve the efficiency of breaking rock of drill bit drilling.
Specifically, broken drill bit 4, which is broken through after rock surface, reduces the resistance that the outside broken rock of bit body 1 is subject to, it is easier to
Rock surface is invaded, this broken rock mode is avoided by single drill bit pure shear state fractured rock so that the outside area of bit body 1
The rate of wear of cutting tooth 3 in domain is significantly faster than that the cutting tooth 19 in center portion region so that while bit body 1 easily weares and teares and serious
The problem of restricting the efficiency of breaking rock of PDC drill bit；At the same time, the support slipper 11 in rolling composite bearing 7 is due to low melting point gold
Belong to and the amount of heat that severe friction is produced is absorbed in drill bit drilling process, the low-melting-point metal for absorbing amount of heat absorbs a large amount of
Liquid volume expansion is changed into from solid after heat and becomes big, the support slipper 11 after expanded by heating can be by rolling composite bearing 7
Revolving body 13 inwardly with broken drill bit 4 even at the cost of one's life, now, crush the bit body 1 peripheral with it of drill bit 4 be in the high rotating speed of integral mechanism,
The cooperation drilling broken rock drilling of thump, because rock surface has been broken, so that the bit body 1 of the broken periphery of drill bit 4 enters
The mechanical load received during one step drilling well is smaller, can more break through compared with hard formation；The drilling effect of composite drill bit can be effectively improved
Rate, such a interior impact grinding formula PDC drill bit has broken through PDC drill bit in the technical barrier for being difficult to creep into compared with hard formation；And will not be right
The bit body 1 of the broken periphery of drill bit 4 causes faster abrasion, is conducive to improving the service life of drill bit, saves drilling cost.
Described above, only presently preferred embodiments of the present invention is not intended to limit the invention, patent protection model of the invention
Enclose and be defined by claims, the equivalent structure change that every specification and accompanying drawing content with the present invention is made, similarly
Should be comprising within the scope of the present invention.
Claims (10)
1. on a kind of interior impact grinding formula PDC composite drill bits, including bit body and the wing being installed on bit body, the wing
Provided with several Cutters, it is characterised in that：The bit body center portion is arranged with and crushing that bit body is detachably connected
The actuating unit that drill bit and the broken drill bit of driving are rotated, the actuating unit is fixedly connected with the broken drill bit；The drill bit
Rolling composite bearing is provided between body and the broken drill bit.
2. a kind of interior impact grinding formula PDC composite drill bits according to claim 1, it is characterised in that：The actuating unit
Including drive block and screwed pipe, the screwed pipe is located in the bit body and is threadedly coupled with the bit body, described to drive
Motion block is arranged on the end of the screwed pipe and is detachably connected with the broken drill bit.
3. a kind of interior impact grinding formula PDC composite drill bits according to claim 1, it is characterised in that：The broken drill bit
Drilling area overlay area account for the bit body drilling area overlay area 35%-55%.
4. a kind of interior impact grinding formula PDC composite drill bits according to claim 1, it is characterised in that：Described roll is combined
Bearing includes interior revolving body, external gyrorotor and the annular rolling groove formed by interior revolving body and external gyrorotor, the annular rolling
Several rolling elements are provided with dynamic groove, several described rolling elements are circumferentially angularly uniformly distributed along annular rolling groove, adjacent rolling
Support slipper is provided between kinetoplast.
5. a kind of interior impact grinding formula PDC composite drill bits according to claim 4, it is characterised in that：The support slipper
Interior be provided with hollow cavity, the hollow cavity is filled with low-melting-point metal, interior revolving body and the branch of the rolling composite bearing
The material for supportting sliding block uses copper or aluminum alloy materials.
6. a kind of interior impact grinding formula PDC composite drill bits according to claim 1, it is characterised in that：The wing includes
The operator wing and secondary wing, the operator wing and secondary wing are installed on bit body in Archimedes spiral.
7. a kind of interior impact grinding formula PDC composite drill bits according to claim 6, it is characterised in that：It is described operator the wing and
The quantity of secondary wing is three, the operator wing along the circumferential uniform of bit body, the secondary wing along bit body it is circumferential
Cloth and with it is described operator the wing be arranged at intervals.
8. a kind of interior impact grinding formula PDC composite drill bits according to claim 1,6 or 7 any one, it is characterised in that：
The cutting contoured surface of the broken drill bit is in spherical crown surface, and spherical crown surface radian is π/3.
9. a kind of interior impact grinding formula PDC composite drill bits according to claim 8, it is characterised in that：The bit body
It is in spherical crown surface to cut contoured surface, and the centre of sphere and the bit body of the cutting contoured surface of the broken drill bit cut the ball of contoured surface
The heart is overlapped.
10. a kind of interior impact grinding formula PDC composite drill bits according to claim 1, it is characterised in that：The broken drill bit
Provided with broken Cutter and damping tooth, drilling area of the broken Cutter along broken drill bit is radially linear
Angularly it is distributed, the damping tooth and the spaced setting of the cutting tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710692100.9A CN107313720A (en) | 2017-08-14 | 2017-08-14 | A kind of interior impact grinding formula PDC composite drill bits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710692100.9A CN107313720A (en) | 2017-08-14 | 2017-08-14 | A kind of interior impact grinding formula PDC composite drill bits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107313720A true CN107313720A (en) | 2017-11-03 |
Family
ID=60175758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710692100.9A Withdrawn CN107313720A (en) | 2017-08-14 | 2017-08-14 | A kind of interior impact grinding formula PDC composite drill bits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107313720A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654195A (en) * | 2017-11-13 | 2018-02-02 | 中国石油大学(华东) | Composite impact rolls self-adjustable PDC drill bit |
| CN108179983A (en) * | 2018-02-26 | 2018-06-19 | 西南石油大学 | It is a kind of to rush the efficient rock-breaking combination tool for revolving-scraping and cut staged effect |
| CN110185399A (en) * | 2019-06-19 | 2019-08-30 | 西南石油大学 | A kind of omnidirectional's angle PDC drill bit slowing down broken rock impact force |
| CN111411897A (en) * | 2020-05-28 | 2020-07-14 | 西南石油大学 | Punching PDC drill bit |
| CN112267838A (en) * | 2020-11-13 | 2021-01-26 | 刘伟 | Efficient rock breaking PDC drill bit |
| CN112302538A (en) * | 2020-11-13 | 2021-02-02 | 刘伟 | PDC-roller composite bit |
| CN112502693A (en) * | 2020-12-10 | 2021-03-16 | 中国科学院武汉岩土力学研究所 | Many cameras rock mass structure drilling rod of making a video recording |
| CN115370295A (en) * | 2022-08-12 | 2022-11-22 | 中煤科工集团西安研究院有限公司 | Impact-resistant PDC drill bit with buffering and damping functions |
-
2017
- 2017-08-14 CN CN201710692100.9A patent/CN107313720A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654195A (en) * | 2017-11-13 | 2018-02-02 | 中国石油大学(华东) | Composite impact rolls self-adjustable PDC drill bit |
| CN107654195B (en) * | 2017-11-13 | 2024-01-30 | 中国石油大学(华东) | Composite impact rolling self-adjusting PDC drill bit |
| CN108179983A (en) * | 2018-02-26 | 2018-06-19 | 西南石油大学 | It is a kind of to rush the efficient rock-breaking combination tool for revolving-scraping and cut staged effect |
| CN110185399A (en) * | 2019-06-19 | 2019-08-30 | 西南石油大学 | A kind of omnidirectional's angle PDC drill bit slowing down broken rock impact force |
| CN111411897A (en) * | 2020-05-28 | 2020-07-14 | 西南石油大学 | Punching PDC drill bit |
| CN112267838A (en) * | 2020-11-13 | 2021-01-26 | 刘伟 | Efficient rock breaking PDC drill bit |
| CN112302538A (en) * | 2020-11-13 | 2021-02-02 | 刘伟 | PDC-roller composite bit |
| CN112502693A (en) * | 2020-12-10 | 2021-03-16 | 中国科学院武汉岩土力学研究所 | Many cameras rock mass structure drilling rod of making a video recording |
| CN115370295A (en) * | 2022-08-12 | 2022-11-22 | 中煤科工集团西安研究院有限公司 | Impact-resistant PDC drill bit with buffering and damping functions |
| CN115370295B (en) * | 2022-08-12 | 2023-07-14 | 中煤科工集团西安研究院有限公司 | PDC drill bit shocks resistance with buffering shock-absorbing function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207260959U (en) | A kind of PDC composite drill bits for improving drill bit center portion efficiency of breaking rock | |
| CN107313720A (en) | A kind of interior impact grinding formula PDC composite drill bits | |
| CN107503690A (en) | A kind of scalable breaking PDC composite drill bits | |
| CN102536124B (en) | Single-roller bit with PDC (polycrystalline diamond compact) composite plates | |
| CN207553972U (en) | A kind of combined cut diamond bit | |
| CN103089156B (en) | Composite drill bit with cutter blade provided with cutter disk cutting structure | |
| CA2805196C (en) | Scraping-wheel drill bit | |
| CN207315238U (en) | A kind of PDC composite drill bits that can independently creep into | |
| CN108952582A (en) | PDC drill bit suitable for double pendulum speed-raising drilling tool | |
| CN207829819U (en) | A kind of low torque diamond bit suitable for hard formation drilling | |
| CN103541660B (en) | A kind of composite type eccentric one-cone bit | |
| CN208106331U (en) | Combined type diamond bit with slew buffer structure | |
| CN106368615B (en) | A kind of composite drill bit with steering wheel disc | |
| CN203201475U (en) | Drill provided with rotating disc cutters on cutter wings | |
| CN110359852A (en) | Combined type diamond bit with fixed buffer structure | |
| CN109681122A (en) | A kind of two rank step scraper | |
| CN208718574U (en) | PDC drill bit suitable for double pendulum speed-raising drilling tool | |
| CN110145241A (en) | A kind of low torque diamond bit suitable for hard formation drilling | |
| CN206655657U (en) | A kind of directed drilling diamond bit | |
| CN207297630U (en) | Self cooled roll-slide combined bearing can be achieved in one kind | |
| CN108798514A (en) | A kind of directed drilling diamond bit | |
| CN203796171U (en) | Composite drill bit | |
| CN109306851A (en) | A kind of rotary cutting module and the diamond bit with this module | |
| CN203201474U (en) | Drill of double-side supporting disc knife structure | |
| CN206174873U (en) | Composite drill bit with turn to rim plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171103 |