CN105822229B - PDC drill bit with torsional pulse function - Google Patents
PDC drill bit with torsional pulse function Download PDFInfo
- Publication number
- CN105822229B CN105822229B CN201610321016.1A CN201610321016A CN105822229B CN 105822229 B CN105822229 B CN 105822229B CN 201610321016 A CN201610321016 A CN 201610321016A CN 105822229 B CN105822229 B CN 105822229B
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- Prior art keywords
- valve body
- bit
- jump bit
- drill bit
- side wall
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- 238000005520 cutting process Methods 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 39
- 239000011435 rock Substances 0.000 abstract description 11
- 238000009527 percussion Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 28
- 210000000515 tooth Anatomy 0.000 description 19
- 230000035515 penetration Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004080 punching Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 210000004233 talus Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A kind of PDC drill bit with torsional pulse function, including drill body and the device being arranged in the middle part of drill body；The device that spins includes stress housing, turns to valve body, jump bit, upper cover plate and lower cover, wherein turning to, valve body, jump bit, stress housing are nested successively from inside to outside, upper cover plate and lower cover are individually fixed in the upper surface and lower surface of stress housing.The present invention improves the mechanical separator speed of drill bit using drill bit self-vibration percussion, and then improves efficiency of breaking rock, also solves the mud drum or stick slip problems occurred at the soft or hard staggeredly stratum of drill bit drilling.
Description
Technical field
The present invention relates to drill bit, more particularly to a kind of PDC (Polycrystalline with torsional pulse function
Diamond Compact, composite polycrystal-diamond) drill bit.
Background technology
In Process of Oil Well Drilling, substantial amounts of manpower and materials can be saved using the drill bit of rate of penetration high, therefore improve
The rate of penetration of drill bit has very important significance.At present, had been carried out both at home and abroad in terms of rate of penetration is improved merely
Substantial amounts of research work.PDC drill bit is so that rate of penetration is fast, long service life the advantages of be increasingly widely applied, improve
PDC drill bit, further improves its mechanical separator speed, plays the role of for oil drilling speed-raising irreplaceable.
In the improvement of PDC drill bit, those skilled in the art often through change the wing quantity of drill bit, wing angle,
The aspects such as cutting tooth quantity, cutting tooth angle improve the mechanical separator speed of PDC drill bit.However, above-mentioned change still can not be obtained
Gratifying effect, expects further to improve the design of PDC drill bit, improves the mechanical separator speed of PDC drill bit.
The content of the invention
It is an object of the invention to provide a kind of PDC drill bit with torsional pulse function, it has rate of penetration higher,
And the problems such as can prevent drill bit from occurring stick-slip, mud drum in drilling process.
The present invention uses solution below：
A kind of PDC drill bit with torsional pulse function, including drill body and be arranged in the middle part of the drill body
Spin device；
The device that spins includes stress housing, jump bit, steering valve body, upper cover plate and lower cover, wherein the steering
Valve body, jump bit, stress housing are nested successively from inside to outside, and the upper cover plate and lower cover are individually fixed in the stress housing
Upper surface and lower surface；
The stress housing is fixed to the drill body, and a pair relative limits are provided with the inwall of the stress housing
Position groove, on the inwall of the stress housing, the both sides of each limited impression be respectively provided with the first guiding gutter and the second water conservancy diversion
Groove；
It is provided with a pair the first relative spacing preiections on the outer surface of the jump bit, and first spacing preiection
Width is respectively arranged with the both sides side wall of each the first spacing preiection and penetrates the impact less than the width of the limited impression
The first side wall hole and second sidewall hole of hammer, are provided with a pair the second relative spacing preiections on the inwall of the jump bit,
The both sides of each the second spacing preiection are respectively provided with the first pod apertures and the second pod apertures for penetrating jump bit side wall；
The valve body that turns to is provided centrally with valve body centre bore, and a pair relative grooves are provided with the wall of side, described logical
Groove is connected with the valve body centre bore, and two groups of relative stop tabs, every group are provided with the outer surface for turning to valve body
Stop tab includes left limit fin and right limit fin, when the steering valve body is inserted in the jump bit, described second
Spacing preiection is inserted between the left limit fin and right limit fin；
The lower cover is provided with cover central hole and cover plate through hole, and the position of the cover plate through hole is led with described first
Chute and the second guiding gutter are corresponding；
Wherein, the switching valve body can be rotated relative to the jump bit between first state and the second state, institute
Stating jump bit can between the first location and the second location rotate relative to the stress housing.
Preferably, when the jump bit is located at the first position, first guiding gutter aligns with the first pod apertures,
Second guiding gutter is closed by jump bit side wall, and first spacing preiection is in contact with the side side wall of limited impression；When
When the jump bit is located at the second place, second guiding gutter aligns with the second pod apertures, the first guiding gutter quilt
Jump bit side wall closing, first spacing preiection is in contact with the opposite side side wall of limited impression.
Preferably, when the switching valve body is located at the first state, the first side wall hole connects with the groove,
The second sidewall hole is not connected with the groove, and the left limit fin is contacted with second spacing preiection；When described turn
To valve body be located at second state when, the first side wall hole does not connect with the groove, the second sidewall hole with it is described
Groove is connected, and the right limit fin is contacted with second spacing preiection.
Preferably, the drill body includes：
Joint；
Multiple wings, the wing is arranged at the bizet of the drill body；
Cutting tooth, the cutting tooth is arranged on the wing；And
Nozzle, the nozzle is arranged between adjacent blades, and is connected with the inlet opening of the drill bit.
Preferably, the width of the distance between the left limit fin and right limit fin more than first spacing preiection
With the width sum of the first pod apertures, and the distance more than first spacing preiection width and the second pod apertures width
Sum.
Preferably, the upper cover plate is provided centrally with nozzle bore.
Preferably, the upper cover plate is provided with a pair relative waist-shaped holes.
Preferably, a pair relative water-flowing troughs are provided with the inwall of the stress housing, the upper cover plate is provided with one
To relative limbers, the water-flowing trough is corresponding with the position of limbers.
Preferably, the device that spins is welded in the drill body middle part.
The beneficial effects of the invention are as follows by setting the device that spins on PDC drill bit, carried using drill bit self-vibration percussion
The mechanical separator speed of drill bit high, and then efficiency of breaking rock is improved, also solve the mud drum occurred at the soft or hard staggeredly stratum of drill bit drilling
Or stick slip problems.Additionally, being different from the mode of conventional PDC drill bit rock cutting, PDC drill bit of the invention cuts rock with chisel
Effect.
Brief description of the drawings
Exemplary embodiment is described in more detail by with reference to accompanying drawing, of the invention above-mentioned and other purposes,
Feature and advantage will be apparent, wherein, in the exemplary embodiment, identical reference typically represents identical portions
Part.
Fig. 1 shows the stereogram of the PDC drill bit with torsional pulse function according to exemplary embodiment；
Fig. 2 shows the sectional view of the PDC drill bit with torsional pulse function according to exemplary embodiment；
Fig. 3 is shown when jump bit is located at first position, switching valve body and is located at first state, along the c-c sections in Fig. 2
Sectional view；
Fig. 4 is shown when jump bit is located at the second place, switching valve body and is located at first state, along the c-c sections in Fig. 2
Sectional view；
Fig. 5 is shown when jump bit is located at the second place, switching valve body and is located at the second state, along the c-c sections in Fig. 2
Sectional view；
Fig. 6 is shown when jump bit is located at first position, switching valve body and is located at the second state, along the c-c sections in Fig. 2
Sectional view.
Main Reference Numerals explanation：
1- drill bodies, 2- spins device, and 3- turns to valve body, 4- jump bits, 5- stress housings, 6- upper cover plates, 7- lower covers
Plate, 8- joints, 9- bizets, 10- wings, 11- cutting tooths, 12- nozzles, 13- inlet openings, 14- limited impressions, 15- spacing preiections,
16- spacing preiections, 17- weld seams, the guiding gutters of 18- first, the guiding gutters of 19- second, the pod apertures of 20- first, the pod apertures of 21- second,
22- cover central holes, 23- cover plate through holes, 24- waist-shaped holes, 25- nozzle bores, 26- valve body centre bores, 27- water-flowing troughs, 28- water flowings
Hole, 29- grooves, 30- spaces, 31- the first side walls hole, 32- second sidewalls hole, 34- left limit fins, 35- right limit fins.
Specific embodiment
The preferred embodiments of the present invention are more fully described below with reference to accompanying drawings.Although being shown in accompanying drawing of the invention
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by embodiments set forth here
System.Conversely, these embodiments are provided so that the present invention is more thorough and complete, and can be complete by the scope of the present invention
Convey to those skilled in the art.
In this manual, in the case where opposite explanation is not made, the noun of locality for using as " it is upper and lower, bottom, top, it is forward and backward,
It is left and right, inside and outside " answer page shown in refer to the attached drawing.
Fig. 1 shows the stereogram of the PDC drill bit with torsional pulse function according to exemplary embodiment, and Fig. 2 shows
The sectional view of the PDC drill bit with torsional pulse function according to exemplary embodiment, Fig. 3 to Fig. 6 is respectively illustrated when punching
When hammer and switching valve body are located at different positions and state, along the sectional view of the c-c sections in Fig. 2.Below with reference to Fig. 1-6
Describe the structure and operation principle of the PDC drill bit with torsional pulse function according to exemplary embodiment in detail.
The PDC drill bit with torsional pulse function according to exemplary embodiment includes drill body 1 and is arranged at drill bit
The device 2 that spins at the middle part of body 1.
Drill body 1 includes joint 8, wing 10, cutting tooth 11 and nozzle 12.The top of drill body 1 is bizet 9, one
As in the case of, bizet 9 is made up and surface surfacing wearing layer of Steel material.Wing 10 is arranged on bizet 9, and conventional PDC is bored
Head is uniformly arranged 4-6 piece wings on bizet 9.Joint 8 is located in the bottom of drill body 1, joint 8 and is provided with inlet opening 13.
Cutting tooth 11 is arranged on wing 10, and multiple cutting tooths 11 are set on every wing 10.Cutting tooth 11 may include master
Cutting tooth, rear toothrow, gauge teeth and gauge lie low tooth.Wherein main cutting tooth is distributed in wing top forward position, at an angle
Arrangement (15~25 ° of hypsokinesis), the peak contact rock of main cutting tooth, primarily serves the effect of rock cutting in drilling process.
Afterwards toothrow is typically disposed in behind flimsy preceding toothrow, when front-seat cutting tooth is damaged from substitute before toothrow cut
Effect.Generally, the proud exposure of rear toothrow will be less than preceding toothrow, play a part of toothrow cutting depth before limitation.This
Sample, it is ensured that the service life of flimsy preceding toothrow.Gauge teeth and the gauge tooth that lies low all are embedded in gauge position, the two
Effect is consistent, is all the wearability for strengthening bit gauge protection position.Gauge position is prone to wear out in drilling process, after abrasion
It is difficult to ensure that the quality and size of well.And the wearability of general steel is excessively poor, therefore it is flat to be covered with gauge in gauge surface
Lie tooth, gauge forward position is covered with gauge teeth, which enhances the wearability at gauge position.
Nozzle 12 is arranged between adjacent blades 10, and is connected with the inlet opening 13 of drill bit.Nozzle 12 is preferably by hard
Matter alloy material is made.
The device 2 that spins is arranged at the middle part of drill body 1, it is preferable that the device 2 that spins is arranged at drill bit sheet by welding manner
The middle part of body 1, the upper and lower part with drill body 1 is connected, and the reference 17 in Fig. 2 represents connection drill body 1 and rotation
The weld seam of flushing device 2.The device 2 that spins includes stress housing 5, jump bit 4, turns to valve body 3, upper cover plate 6 and lower cover 7.Wherein
Turn to valve body 3, jump bit 4, stress housing 5 nested successively from inside to outside, upper cover plate 6 and lower cover 7 are individually fixed in stress shell
The upper surface and lower surface of body 5.
Stress housing 5 is fixed to drill body 1, a pair relative limited impressions 14 is provided with its inwall, in stress shell
On the inwall of body 5, the both sides of each limited impression 14 be respectively provided with the first guiding gutter 18 and the second guiding gutter 19.As preferred side
Case, two the first guiding gutters 18 are oppositely arranged, and two the second guiding gutters 19 are oppositely arranged.
A pair relative spacing preiections 15 are provided with the outer surface of jump bit 4, and the width of the spacing preiection 15 is less than
The width of limited impression 14, so as to when jump bit 4 is inserted in stress housing 5, spacing preiection 15 is inserted into limited impression 14
In.The first side wall hole 31 and second sidewall hole for penetrating jump bit 4 are respectively arranged with the both sides side wall of each spacing preiection 15
32, so that drilling fluid can flow to outside by the first side wall hole 31 and second sidewall hole 32 from the inside of jump bit 4.Jump bit
A pair relative gear projections 16 are provided with 4 inwall, are respectively provided with the both sides of each gear projection 16 and are penetrated jump bit
First pod apertures 20 and the second pod apertures 21 of side wall.Preferably, two the first pod apertures 20 are oppositely arranged, two
Two pod apertures 21 are oppositely arranged.
Turn to valve body 3 is provided centrally with valve body centre bore 26, and a pair relative grooves 29, groove 29 are provided with the wall of side
It is connected with valve body centre bore 26, so as to can be flowed by groove 29 by the drilling fluid that valve body centre bore 26 flows into steering valve body 3
Go out.Two groups of relative stop tabs are provided with the outer surface for turning to valve body 3, every group of stop tab includes the He of left limit fin 34
Right limit fin 35.When turning in the insertion jump bit 4 of valve body 3, spacing preiection 16 may be inserted into stop tab 34 and right limit
Between fin 35.Preferably, the distance between left limit fin 34 and right limit fin d are spacing more than jump bit 4
Raised 15 width wx and width w1 sums (the i.e. d of the first pod apertures 20>Wx+w1), the limit apart from d also greater than jump bit 4
The width wx and width w2 sums (the i.e. d of the second pod apertures 21 of position raised 15>wx+w2).So as to drilling fluid is more easily by the
One pod apertures 20 or the second pod apertures 21 flow into the space that the inwall of jump bit 4, spacing preiection 16 are surrounded with stop tab
In 30.
The continuous inflow of drilling fluid enable to turn to valve body 3 relative to jump bit 4 first state and the second state it
Between rotate, jump bit 4 can between the first location and the second location be rotated relative to stress housing 5, and Fig. 3 is shown when impact
When hammer is located at first position, switching valve body positioned at first state, along the sectional view of the c-c sections in Fig. 2, Fig. 4 is shown when punching
When hammer is located at the second place, switching valve body positioned at first state, along the sectional view of the c-c sections in Fig. 2, Fig. 5 shows and works as
When jump bit is located at the second place, switching valve body positioned at the second state, along the sectional view of the c-c sections in Fig. 2, Fig. 6 shows
When jump bit is located at first position, switching valve body is located at the second state, along the sectional view of the c-c sections in Fig. 2.
As shown in Figures 3 and 4, when turning to valve body 3 and being located at first state, the first side wall hole 31 of jump bit 4 and switching valve
The groove 29 of body 3 is connected, and the second sidewall hole 32 of jump bit 4 does not connect with groove 29, turn to valve body 3 left limit fin 34 with
The spacing preiection 16 of jump bit 4 is contacted.In this state, drilling fluid can pass sequentially through turn to valve body 3 valve body centre bore 26,
The first side wall hole 31 of groove 29 and jump bit 4.
As it can be seen in figures 5 and 6, when turning to valve body 3 and being located at the second state, the first side wall hole 31 of jump bit 4 and switching valve
The groove 29 of body 3 is not connected, and the second sidewall hole 32 of jump bit 4 connects with groove 29, turns to right limit fin and the punching of valve body 3
The spacing preiection 16 of hammer 4 is contacted.In this state, drilling fluid can pass sequentially through and turn to the valve body centre bore 26 of valve body 3, leads to
The second sidewall hole 32 of groove 29 and jump bit 4.
As shown in figs. 3 and 6, when jump bit 4 is located at first position, first guiding gutter 18 and jump bit 4 of stress housing 5
The first pod apertures 20 align, the second guiding gutter 19 of stress housing 5 is closed by jump bit side wall, the spacing preiection of jump bit 4
15 are in contact with the side side wall of the limited impression 14 of stress housing 5.Now, the drilling fluid for being flowed into by the first guiding gutter 18 can
Enter the inside of jump bit 4 by first pod apertures 20 of jump bit 4, and jump bit 4 limited by limited impression 14 and
Reach capacity position.
As shown in Figures 4 and 5, when jump bit 4 is located at the second place, second guiding gutter 19 and jump bit 4 of stress housing 5
The second pod apertures 21 align, the first guiding gutter 18 of stress housing 5 is closed by jump bit side wall, the spacing preiection of jump bit 4
15 are in contact with the opposite side side wall of the limited impression 14 of stress housing 5.Now, the drilling fluid for being flowed into by the second guiding gutter 19
The inside of jump bit 4 can be entered by second pod apertures 21 of jump bit 4, and jump bit 4 is limited by limited impression 14
And reach another extreme position.
The both sides side wall of the limited impression 14 of the repeated stock stress housing 5 of jump bit 4, for drill bit provides torsional pulse energy
Amount so that drill bit does not stop chisel and cuts rock such that it is able to more efficiently destroy rock, correspondingly improves the rate of penetration of drill bit.
Upper cover plate 6 and lower cover 7 are individually fixed in the upper surface and lower surface of stress housing 5.Preferably, upper lid
Plate 6 and lower cover 7 are welded in the upper surface and lower surface of stress housing 5.
Lower cover 7 is provided with cover central hole 22 and four cover plate through holes 23, four positions of cover plate through hole 23 and the
One guiding gutter 18 and the second guiding gutter 19 are corresponding, and fluid can be spun by cover central hole 22 and four entrance of cover plate through holes 23
Device 2.
Upper cover plate 6 is provided with waist-shaped hole 24, and drilling fluid can be entered in Bit Cavity body by waist-shaped hole 24.By setting waist type
Hole 24 can be beneficial to passing through for drilling fluid, increase flow.Preferably, the center of upper cover plate 6 is additionally provided with nozzle bore 25.
Preferably, a pair relative water-flowing troughs 27 are provided with the inwall of stress housing 5, upper cover plate 6 is provided with
A pair relative limbers 28, water-flowing trough 27 is corresponding with the position of limbers 28, so as to allow part drilling fluid to pass sequentially through
Water-flowing trough 27 and limbers 28 enter in Bit Cavity body, and are sprayed by nozzle 12.
The operation principle of the PDC drill bit with torsional pulse function according to exemplary embodiment described in detail below.
During using carrying out drilling well according to the PDC drill bit with torsional pulse function of exemplary embodiment, drilling fluid passes through
Inlet opening 13 enters drill bit internal, is then flowed into by the cover central hole 22 and four cover plate through holes 23 of the lower cover 7 of drill bit
Spin device 2.A part of drilling fluid flows into the valve body centre bore 26 for turning to valve body 3 by the cover central hole 22 of lower cover 7.This
Outward, because four positions of cover plate through hole 23 are relative with the first guiding gutter 18 and the second guiding gutter 19 on the inwall of stress housing 5
Should, therefore another part drilling fluid can flow into the first guiding gutter 18 and the second guiding gutter 19 by cover plate through hole 23.
When drill bit is started working, the rotation of drill bit itself and the impact of drilling fluid cause that jump bit 4 and steering valve body 3 start
Rotate, when jump bit 4 turn to first position, turn to valve body 3 be located at first state when (see Fig. 3), the first side wall hole 31 with turn
Connected to the groove 29 of valve body 3, second sidewall hole 32 with turn to valve body 3 groove 29 do not connect, left limit fin 34 with it is spacing
Raised 16 are contacted, and the first guiding gutter 18 aligns with the first pod apertures 20, and the second guiding gutter 19 is closed by jump bit side wall, jump bit
4 spacing preiection 15 is in contact with the side side wall of limited impression 14.Drilling fluid passes sequentially through the valve body centre bore for turning to valve body 3
26th, the first side wall hole 31 (flow direction of arrow display well liquid) of groove 29, spacing preiection 15, so as to promote jump bit 4
It is rotated in the clockwise direction.Meanwhile, drilling fluid is entered inside jump bit 4 by the first pod apertures 20, into jump bit 4
In the space 30 that wall, spacing preiection 16 are surrounded with stop tab, so as to prevent steering valve body 3 from being rotated relative to jump bit 4, turn
It is rotated in the clockwise direction simultaneously with jump bit 4 to valve body 3.Turning to the mistake that valve body 3 is rotated in the clockwise direction with jump bit 4
Cheng Zhong, drilling fluid is gradually filled with the side of groove 14.
Jump bit 4 drives steering valve body 3 to be rotated in the clockwise direction, until jump bit 4 turns to the second place, now,
Turn to valve body 3 and be still located at first state (see Fig. 4).Now, the first side wall hole 31 connects with the groove 29 for turning to valve body 3, and second
Areole 32 is not connected with the groove 29 for turning to valve body 3, and left limit fin 34 is contacted with spacing preiection 16, the second guiding gutter 19 and
Second pod apertures 21 are alignd, and the first guiding gutter 18 is closed by jump bit side wall, spacing preiection 15 and the limited impression 14 of jump bit 4
Opposite side side wall be in contact.In this state, drilling fluid is entered inside jump bit 4 by the second pod apertures 21, and impact turns
To the left limit fin 34 of valve body 3, so as to promote steering valve body 3 to be rotated in the clockwise direction.In the process, due to groove 14
Side in be full of drilling fluid, therefore jump bit 4 remains stationary as, and is still located on the second place.
Rotate valve body 3 to be rotated in the clockwise direction to the second state, now jump bit 4 is still located at the second place (see Fig. 5).
In this state, second sidewall hole 32 connects with the groove 29 for turning to valve body 3, and the first side wall hole 31 is logical with steering valve body 3
Groove 29 is not connected, and right limit fin 35 is contacted with spacing preiection 16, and the second guiding gutter 19 aligns with the second pod apertures 21, and first leads
Chute 18 is closed by jump bit side wall, and spacing preiection 15 is in contact with the opposite side side wall of limited impression 14.Therefore, drilling fluid according to
Secondary valve body centre bore 26, groove 29, second sidewall hole 32 (flow direction of arrow display well liquid) by turning to valve body 3,
So as to promote jump bit 4 to rotate in the counterclockwise direction.Meanwhile, drilling fluid is entered inside jump bit 4 by the second pod apertures 21, is entered
In entering the space 30 that the inwall of jump bit 4, spacing preiection 16 are surrounded with stop tab, thus prevent to turn to valve body 3 relative to
Jump bit 4 is rotated, and is turned to valve body 3 and is rotated in the counterclockwise direction simultaneously with jump bit 4.Valve body 3 is being turned to jump bit 4 along the inverse time
During pin direction rotates, drilling fluid is gradually filled with the opposite side of groove 14.
Jump bit 4 and steering valve body 3 are rotated in the counterclockwise direction jointly, until jump bit 4 returns to first position, are at this moment turned
Moving valve 3 is located at the second state (see Fig. 6).In this state, second sidewall hole 32 connects with the groove 29 for turning to valve body 3,
The first side wall hole 31 is not connected with the groove 29 for turning to valve body 3, and right limit fin 35 is contacted with spacing preiection 16, the first guiding gutter
18 are alignd with the first pod apertures 20, and the second guiding gutter 19 is closed by jump bit side wall, and the spacing preiection 15 of jump bit 4 is recessed with spacing
The side side wall of groove 14 is in contact.In this state, drilling fluid is entered inside jump bit 4 by the first pod apertures 20,
The right limit fin 35 of bump steer valve body 3, so as to promote steering valve body 3 to rotate in the counterclockwise direction.In the process, due to
Drilling fluid is full of in the opposite side of the groove 14, therefore jump bit 4 is remained stationary as, and is still located on first position.This stage
Rotation terminate after, jump bit 4 be located at first position, turn to valve body 3 be located at first state, i.e., the state shown in Fig. 3, Ke Yikai
Begin the operation in next cycle.
The continuous inflow of drilling fluid causes the both sides side wall of the limited impression 14 of the repeated stock stress housing 5 of jump bit 4, from
And for drill bit provides torsional pulse energy so that drill bit does not stop chisel and cuts rock such that it is able to more efficiently destroy rock, accordingly
Improve the rate of penetration of drill bit in ground.(rate of penetration=drilling depth (drilling depth)/time (drilling time)).
Additionally, in drilling well, because the large rock-carrying ability of drilling fluid is inadequate, it is impossible to effectively take away landwaste, in bit face
Of short duration accumulation can be formed, is lengthened over time, talus deposit is more and more, finally wrap up drill bit, form showing for bit balling
As.For the PDC drill bit with torsional pulse function according to exemplary embodiment, because jump bit being capable of repeated stock stress
Housing, drives drill vibration, and landwaste can be prevented to be bonded at bit face.
Finally, drill vibration causes the effect that there is drill bit chisel to cut, and can make drill bit more effectively wedging stratum, prevents drill bit
There is skidding in rock surface.
Above-mentioned technical proposal is a kind of embodiment of the invention, for those skilled in the art, in this hair
On the basis of bright principle disclosed, it is easy to make various types of improvement or deformation, the present invention is not limited solely to above-mentioned specific
The description of embodiment, therefore description above is preferred, and not restrictive meaning.
Claims (8)
1. a kind of PDC drill bit with torsional pulse function, including drill body (1) and it is arranged in the drill body (1)
The device that spins (2) in portion；
The device that spins (2) includes stress housing (5), jump bit (4), steering valve body (3), upper cover plate (6) and lower cover
(7), wherein the switching valve body (3), jump bit (4), stress housing (5) are nested successively from inside to outside, the upper cover plate (6) and
Lower cover (7) is individually fixed in the upper surface and lower surface of the stress housing (5)；
The stress housing (5) is fixed to the drill body (1), and a pair of phases are provided with the inwall of the stress housing (5)
To limited impression (14), on the inwall of the stress housing (5), the both sides of each limited impression (14) be respectively provided with first
Guiding gutter (18) and the second guiding gutter (19)；
A pair relative the first spacing preiections (15), and first limit convex are provided with the outer surface of the jump bit (4)
The width of the width less than the limited impression (14) of (15) is played, is set respectively on the both sides side wall of each the first spacing preiection (15)
The first side wall hole (31) and second sidewall hole (32) for penetrating the jump bit are equipped with, are set on the inwall of the jump bit (4)
There are a pair relative the second spacing preiections (16), be respectively provided with the both sides of each the second spacing preiection (16) and penetrate jump bit side
First pod apertures (20) and the second pod apertures (21) of wall；
The valve body (3) that turns to is provided centrally with valve body centre bore (26), is provided with a pair relative grooves (29) on the wall of side,
The groove (29) is connected with the valve body centre bore (26), and two groups of phases are provided with the outer surface for turning to valve body (3)
To stop tab, every group of stop tab include left limit fin (34) and right limit fin (35), valve body (3) turned to when described
When inserting in the jump bit (4), second spacing preiection (16) is inserted between the left limit fin and right limit fin；
The lower cover (7) is provided with cover central hole (22) and cover plate through hole (23), the position of the cover plate through hole (23)
It is corresponding with first guiding gutter (18) and the second guiding gutter (19)；
Wherein, steering valve body (3) can rotate relative to the jump bit (4) between first state and the second state,
The jump bit (4) can between the first location and the second location rotate relative to the stress housing (5)；
The device that spins (2) is welded in the drill body (1) middle part.
2. the PDC drill bit with torsional pulse function according to claim 1, wherein when the jump bit (4) is positioned at institute
When stating first position, first guiding gutter (18) is alignd with the first pod apertures (20), and second guiding gutter (19) is impacted
Hammer side wall closing, first spacing preiection (15) is in contact with the side side wall of limited impression (14)；When the jump bit (4)
During positioned at the second place, second guiding gutter (19) is alignd with the second pod apertures (21), first guiding gutter (18)
By the closing of jump bit side wall, first spacing preiection (15) is in contact with the opposite side side wall of limited impression (14).
3. the PDC drill bit with torsional pulse function according to claim 1, wherein when steering valve body (3) is located at
During the first state, the first side wall hole (31) connects with the groove (29), the second sidewall hole (32) with it is described
Groove (29) is not connected, and the left limit fin (34) contacts with second spacing preiection (16)；When steering valve body (3)
During positioned at second state, the first side wall hole (31) does not connect with the groove (29), the second sidewall hole (32)
Connected with the groove (29), the right limit fin (35) contacts with second spacing preiection (16).
4. the PDC drill bit with torsional pulse function according to claim 1, wherein the drill body (1) includes：
Joint (8)；
Multiple wings (10), the wing (10) is arranged at the bizet (9) of the drill body (1)；
Cutting tooth (11), the cutting tooth (11) is arranged on the wing (10)；And
Nozzle (12), the nozzle (12) is arranged between adjacent blades (10), and is connected with the inlet opening (13) of the drill bit
It is logical.
5. the PDC drill bit with torsional pulse function according to claim 1, wherein the left limit fin and right limit
The distance between fin is more than the width of first spacing preiection (15) and the width sum of the first pod apertures (20), and described
Distance is more than the width of first spacing preiection (15) and the width sum of the second pod apertures (21).
6. the PDC drill bit with torsional pulse function according to claim 1, wherein the center of the upper cover plate (6) sets
It is equipped with nozzle bore (25).
7. the PDC drill bit with torsional pulse function according to claim 1, wherein the upper cover plate (6) is provided with
To relative waist-shaped hole (24).
8. the PDC drill bit with torsional pulse function according to claim 1, wherein the inwall of the stress housing (5)
On be provided with a pair relative water-flowing troughs (27), the upper cover plate (6) is provided with a pair relative limbers (28), the water flowing
Groove (27) is corresponding with the position of limbers (28).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610321016.1A CN105822229B (en) | 2016-05-16 | 2016-05-16 | PDC drill bit with torsional pulse function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610321016.1A CN105822229B (en) | 2016-05-16 | 2016-05-16 | PDC drill bit with torsional pulse function |
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| CN105822229A CN105822229A (en) | 2016-08-03 |
| CN105822229B true CN105822229B (en) | 2017-06-23 |
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| CN201610321016.1A Active CN105822229B (en) | 2016-05-16 | 2016-05-16 | PDC drill bit with torsional pulse function |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703704A (en) * | 2016-12-09 | 2017-05-24 | 中国石油天然气集团公司 | Non-planar cutting tooth for improving rock breaking efficiency and diamond drill bit |
| CN106907113B (en) * | 2017-05-05 | 2024-03-26 | 宜昌神达科技有限公司 | PDC drill bit suitable for exploiting shale gas in ancient kingdom on depression in Hunan province |
| CN107401374A (en) * | 2017-09-14 | 2017-11-28 | 长江大学 | A kind of torsion impact speed-raising instrument |
| CN107956419A (en) * | 2017-12-12 | 2018-04-24 | 穆总结 | A kind of jar |
| CN108692903B (en) * | 2018-05-16 | 2020-10-02 | 长江大学 | Experimental device for applying torsional impact to micro PDC drill bit in micro-drilling experiment |
| CN109538128B (en) * | 2019-01-18 | 2024-04-02 | 沧州格锐特钻头有限公司 | Shockproof PDC drill bit |
| CN110617012B (en) * | 2019-10-21 | 2021-05-11 | 沧州格锐特钻头有限公司 | PDC drill bit with rotary oscillation impact function |
| CN111005684B (en) * | 2019-12-31 | 2021-05-14 | 三峡大学 | Electromagnetic impact rock breaking and drilling device and using method |
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| US6742609B2 (en) * | 2001-05-11 | 2004-06-01 | United Diamond Ltd. | Rotational impact drill assembly |
| CN102454364A (en) * | 2010-10-19 | 2012-05-16 | 中国石油化工集团公司 | Torsional impact drilling tool |
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| US6742609B2 (en) * | 2001-05-11 | 2004-06-01 | United Diamond Ltd. | Rotational impact drill assembly |
| CN102454364A (en) * | 2010-10-19 | 2012-05-16 | 中国石油化工集团公司 | Torsional impact drilling tool |
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| CN105822229A (en) | 2016-08-03 |
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