CN208330198U - The PDC drill bit of passive swivel nozzle is provided on a kind of wing - Google Patents
The PDC drill bit of passive swivel nozzle is provided on a kind of wing Download PDFInfo
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- CN208330198U CN208330198U CN201820971082.8U CN201820971082U CN208330198U CN 208330198 U CN208330198 U CN 208330198U CN 201820971082 U CN201820971082 U CN 201820971082U CN 208330198 U CN208330198 U CN 208330198U
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- nozzle
- drill bit
- wing
- passive
- swivel nozzle
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Abstract
The PDC drill bit of passive swivel nozzle is provided on a kind of wing, including bit body, fixing wing, PDC tooth is provided in fixing wing, water hole or fixed nozzle, it is characterized by: at least provided with a passive swivel nozzle on the wing of drill bit, nozzle bore is provided on the wing, passive swivel nozzle and nozzle bore, which are formed, to be rotatablely connected, and the cutting contour line difference in height d of nozzle and drill bit is more than or equal to 0, that is d >=0, hydraulic motor and hydraulic pump are provided in bit body, make hydraulic jet that there is higher instantaneous impact in this way, the region of hydraulic jet changes at any time simultaneously, hydraulic drilling range is widened, drill bit scrapes the coupling broken rock for cutting through rock two ways by jet stream shear tension broken rock and PDC tooth, improve the efficiency of breaking rock of drill bit, the utilization rate of bit hydraulic energy is improved simultaneously, to be promoted The comprehensive performance of drill bit.
Description
Technical field
The invention belongs to oil-gas drilling engineering, mine engineering, building foundation engineering constructions, geological drilling, tunnel
The technical equipment such as engineering, the hydrology and no-dig technique field, and in particular to the PDC drill bit of passive swivel nozzle is set on a kind of wing.
Background technique
PDC drill bit by high rigidity, it is wear-resisting, from sharp composite polycrystal-diamond (abbreviation PDC tooth or cutting tooth) conduct
Cutting element is sheared and fractured rock.PDC drill bit rate of penetration in soft-medium hard formation is high, the service life is long, and drilling cost is low,
Therefore it is used widely in the drilling of oil/gas well.
In oil/gas drilling engineering, the geological conditions on stratum is often very complicated, the mud shale and argillaceous sandstone of deep formation
Deng under the conditions of overlying formation pressure and high density drilling fluid, not only density and hardness increases, but also from the brittleness under normal pressure
For rock to modeling brittle rock or plastic rock conversion, drillability is very poor, in addition the hydraulic energy wretched insufficiency of deep well section, cannot
The effect of waterpower auxiliary rock is effectively played, the speed of drilling is at a fairly low.Fixed nozzle effect on drill bit is only cooling PDC tooth
Shaft bottom is left with cutting carring, it is limited to the auxiliary rock ability of bottom rock.Drill bit will often pass through a variety of different lithologies
Stratum, these stratum not only include the incompetent bed for being easier to bore that compares, but also including the poor hard formation of drillability, high abrasive
Stratum, plastic formation, soft or hard staggered alternating layers, steep stratum of height containing the serious heterogeneity stratum such as gravel and high inclination-angle etc..These
Complicated formation condition is easy to cause the extraordinary failure of PDC drill bit, or makes drilling effect of the drill bit under Special Drilling Operation process conditions
Fruit is deteriorated, and only is difficult to meet present drilling well demand by mechanical broken rock.
Crown profile shape is the very important structure feature of diamond bit, and the crown profile line of drill bit is also referred to as cutting wheel
Profile, can distributing position feature of the macroscopic view reflection cutting element on drill bit, also can directly reflect the shaft bottom that bit cutting goes out
Basic configuration feature.The crown profile line of diamond bit is usually a smooth curve, parabolically shape, including inner cone,
Crown (nose), five part of outer cone, shoulder and gauge.
Assuming that have on drill bit one by certain point on drill axis and drill bit section plane (referred to as the point axis
Line plane or axial plane).When drill bit rotates under conditions of rate of penetration is zero around own axes, the contour line of cutting element with
Section plane or axial plane are crossed to form intersection, which is the axial plane contour line of cutting element, by the axial plane of all cutting elements
Contour line pools together the shaft bottom coverage diagram to form drill bit, in the coverage diagram of shaft bottom, can be one and all cutting units
The tangent envelope curve of axial plane contour line, referred to as bit cutting contour line, bit cutting contour line reflect drill bit and drill out
Shaft bottom basic configuration feature.Drill body contour line is the position curve for reflecting drill body in the coverage diagram of shaft bottom, is
One important feature curve of diamond bit.Worth explanation is a little that drill bit wing body profiles line and wing cut contour line
It just should not include bit gauge protection part, this is as wing cutting contour line and obtained in body profiles line defines, in drill bit
Main cutting tooth generally refers to the cutting element with straight-cut ability, and the gauge teeth of gage portion is that do not have straight-cut
Ability, so main cutting is not comprising gauge teeth, the cutting contour line and body profiles line of such wing just should be from drill bits
Center starts, and terminates in rule footpath tooth.The drill bit cloth flank of tooth refers to that using drill axis as rotation center, drill body contour line is rotation
Curved surface made of radius intersects after rotating a circle with drill body.
In PDC drill bit, the contour line and section plane or axial plane of PDC cutting tooth are crossed to form intersection, which is PDC
The axial plane contour line of all PDC cutting tooths is pooled together the shaft bottom covering to form PDC drill bit by the axial plane contour line of cutting tooth
Figure, does an envelope curve tangent with the axial plane contour line of all PDC cutting tooths, is the cutting contour line of PDC drill bit.
Chinese patent " crusher drill in the whirl spraying pulse of center " (patent No.: CN201610921247.6) discloses a kind of spin
The drill bit for turning nozzle will stablize fluid using resonatron and be converted into pulsing jet, the water hole offset, drill-in fluid are arranged on nozzle
By forming recoil, generating a rotating torque, nozzle is caused to rotate behind the water hole that offsets, spinning nozzle utilizes jet stream
Shear tension broken rock, high-efficient, frictional resistance is small, the service life is long, the operation is stable, can be improved with clear rock efficiency, for drill bit drilling mention
For centripetal force.This drill bit by continuous-stable liquid turns be pulsing jet while, some energy translates into interior energy
And thermal energy, this portion of energy can not be utilized, capacity usage ratio reduces, while the driving force of nozzle rotation is from pulsing jet,
Pulsing jet should be used to broken rock or cutting carring, and a portion energy, which is consumed to become, makes nozzle rotation, drops significantly
The utilization rate of low bottom hydraulic energy.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of wing in view of the deficiency of the prior art
It is upper that the PDC drill bit passively rotated is set, make hydraulic jet that there is higher instantaneous impact, while the region of hydraulic jet is at any time
Variation, hydraulic drilling range widens, and drill bit is scraped by jet stream shear tension broken rock and PDC tooth to be cut through the coupling of rock two ways and break
Rock, improves the efficiency of breaking rock of drill bit, while improving the utilization rate of bit hydraulic energy, to promote the comprehensive performance of drill bit.
The object of the invention is realized by following technical proposals:
The PDC drill bit of the prior art, generally includes bit body, fixing wing, and PDC tooth, water are provided in fixing wing
The difference of hole or fixed nozzle, the PDC drill bit of this patent is: at least provided with a passive rotation on the wing of drill bit
Nozzle is provided with nozzle bore on the wing, and passive swivel nozzle and nozzle bore, which are formed, to be rotatablely connected, and nozzle and drill bit are cut
It cuts contour line difference in height d and is more than or equal to 0, i.e. d >=0, hydraulic motor and hydraulic pump are provided in bit body.
In the radial coverage diagram of drill bit, the difference in height d of nozzle and bit cutting contour line refers to the outermost of jet expansion
The distance between end and bit cutting contour line are known as difference in height d, as shown in Figure 2, it is specified that nozzle is past relative to cutting contour line
Difference in height d is positive when evagination, on the contrary then be negative.
In this patent, it is provided with hydraulic motor and hydraulic pump in bit body, hydraulic motor and hydraulic pump can nearly drill bits
Fluid conversion be cleaner for high-pressure drilling fluid, provide hydraulic energy for nozzle broken rock, while hydraulic horse is adjusted according to drilling well demand
Up to the running parameter with hydraulic pump, the scope of application of the drill bit is widened；It is passive at least provided with one on the wing of drill bit
Swivel nozzle is provided with nozzle bore on the wing, and passive swivel nozzle and nozzle bore, which are formed, to be rotatablely connected, such structure phase
For conventional nozzle closer to shaft bottom, effective injection distance is effectively improved, and hydraulic jet is made to have higher instantaneous impact, and waterpower
Jet stream not will receive the influence of wing Yu water channel slot, and capacity usage ratio improves；The cutting contour line difference in height d of nozzle and drill bit is big
Bottom rock can be contacted in being equal to 0, i.e. d >=0,1, nozzle；2, nozzle is offset relative to drill axis, and there are torques；Together
When meet two above condition, nozzle can rotate under the driving of bottom rock, the region of such nozzle hydraulic jet
It is to change at any time, hydraulic drilling range is widened, and drill bit is scraped by jet stream shear tension broken rock and PDC tooth and cuts through rock two ways
Broken rock is coupled, the efficiency of breaking rock of drill bit is improved, while improving the utilization rate of bit hydraulic energy, to promote the comprehensive of drill bit
Energy.
Alternatively, at least three high pressure water hole, including 1 high pressure center water hole are provided on passive swivel nozzle.
At least three high pressure water hole, including 1 high pressure center water hole are provided in above scheme, on swivel nozzle, it is more in this way
A water hole can carry out the destruction of jet stream shear tension with rock of the position to shaft bottom from different angles, to improve the broken of drill bit
Rock efficiency.
Nozzle contour line refers to the curve of projection composition of the jet expansion outermost end in drill bit radial direction coverage diagram, such as Fig. 2
Shown in middle mark 42.
Alternatively, passive swivel nozzle contour line is circular arc, parabola.
In above scheme, since the cutting contour line of conventional bit is mostly smooth curve, the contour line of nozzle be circular arc,
Parabola can be improved the goodness of fit of the contour line of nozzle and the cutting contour line of drill bit in this way, guarantee that nozzle can be with shaft bottom
Rock contact, to guarantee that nozzle can rotate in shaft bottom.
Alternatively, it is provided at least three bulge-structure on passive swivel nozzle, and bulge-structure is evenly distributed on nozzle
Circumference on.
At least three bulge-structure is provided in above scheme, on nozzle, and bulge-structure is uniformly distributed the circumference of nozzle
On, the frictional force of nozzle and bottom rock can be obviously reduced in the setting of bulge-structure, and resistance is substantially reduced, and enable nozzle
Quickly, it smoothly rotates, to improve the hydraulic drilling efficiency of nozzle.
Alternatively, hydraulic motor is vane motor, and hydraulic pump is blade hydraulic pump.
In above scheme, vane motor and hydraulic pump are small in size, and rotary inertia is small, sensitive, according to drilling well
Demand adjusts the running parameter of blade, widens the scope of application of the drill bit.
Position of the swivel nozzle in drill bit radial direction coverage diagram is the anchor point C point by nozzle between drill axis
Distance H determine, as shown in Figure 2.
Alternatively, outer 1/3 region positioned at drill bit radial direction radius of passive swivel nozzle.
In above scheme, the rate of wear difference of the PDC tooth in conventional PDC drill bit difference radial position is obvious, general to bore
The rate of wear of external (especially outer 1/3 region of the drill bit radius) cutting tooth of head is significantly faster than that the tooth in center portion region, be due to
The radius of clean-up and cutting output of the PDC tooth of bit exterior greatly increase, and swivel nozzle is arranged in outer the 1/3 of drill bit radial direction radius
Region can share the broken rock amount of the fixed PDC tooth in the region, while the region is that jet stream stretches broken rock and PDC tooth is scraped and cuts through rock
The coupling of two ways, to improve the efficiency of breaking rock of drill bit and extend the service life of drill bit.
Alternatively, the angle theta value range of nozzle-axis and drill axis are as follows: 0≤θ≤90 °, nozzle offset amount S's
Value range are as follows:-D/8≤S≤D/8, wherein D is the diameter of drill bit.
The axis of nozzle and the angle theta of drill axis are as shown in Figure 1, it is specified that angle theta is positive direction along clockwise direction, instead
Be negative.The offset S of nozzle refers to axially not parallel when nozzle-axis with drill bit and when not being overlapped, nozzle-axis and by boring
Head axis and the distance between the plane that is parallel to nozzle-axis, as shown in figure 9, stipulated that: from the profile of nozzle towards drill bit
When body is seen, nozzle-axis relative to drill axis turn right offset be positive offset, on the contrary it is then be negative offset, when nozzle-axis and drill bit
When axial parallel, the offset S of nozzle is the distance between two axis, when nozzle-axis is overlapped or intersects with drill axis
When, offset S is zero.
In above scheme, the presence of the angle theta and nozzle offset amount S of the axis of nozzle and drill axis allows hydraulic drilling
Scraped with PDC tooth cut through rock relative position it is more flexible, with meet drill bit suitable for Different Strata, lithology complex drilling item
Part, while swivel nozzle can cover whole radial zones of drill bit, improve the efficiency of breaking rock of drill bit, to promote the comprehensive of drill bit
Close performance.
Alternatively, passive swivel nozzle realizes axial lock by ball.
In above scheme, swivel nozzle realizes axial lock by ball, prevents the axial motion of swivel nozzle, thus
Extend the service life of drill bit.
Beneficial effects of the present invention:
1, be provided with hydraulic motor and hydraulic pump in bit body, hydraulic motor and hydraulic pump can nearly drill bit drilling fluid
It is converted into cleaner for high-pressure drilling fluid, provides hydraulic energy for nozzle broken rock, while adjusting according to drilling well demand hydraulic motor and hydraulic
The running parameter of pump widens the scope of application of the drill bit.
2, on the wing of drill bit at least provided with a passive swivel nozzle, nozzle bore, quilt are provided on the wing
Dynamic swivel nozzle and nozzle bore, which are formed, to be rotatablely connected, and relative to conventional nozzle closer to shaft bottom, effective injection distance has such structure
Effect improves, and so that hydraulic jet is had higher instantaneous impact, and hydraulic jet not will receive the influence of wing Yu water channel slot, energy
Utilization rate is measured to improve.
3, the cutting contour line difference in height d of nozzle and drill bit is more than or equal to 0, i.e. d >=0, nozzle can contact bottom rock；
Nozzle is offset relative to drill axis, and there are torques；Nozzle can rotate under the driving of bottom rock in this way, in this way
The region of nozzle hydraulic jet is to change at any time, and broken rock range is more extensive, and drill bit passes through jet stream shear tension broken rock and PDC tooth
The coupling broken rock for cutting through rock two ways is scraped, the efficiency of breaking rock of drill bit is improved, while improving the utilization rate of bit hydraulic energy, from
And promote the comprehensive performance of drill bit.
4, heat and harmful substance are not generated when water-jet fractured rock, safe and environment-friendly, fast speed, efficiency are higher.
Detailed description of the invention
Fig. 1 is PDC drill bit cross-sectional view of the present invention；
Fig. 2 is the radial coverage diagram of PDC drill bit of the present invention；
Fig. 3 is PDC drill bit schematic diagram of the present invention；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is that nozzle contour line is circular arc drill bit schematic diagram；
Fig. 6 is to be provided with bulge-structure on swivel nozzle；
Fig. 7 is Section A-A schematic diagram；
Fig. 8 is the partial sectional view that nozzle is provided with ball；
Fig. 9 is the nozzle amount of offsetting S drill bit schematic diagram.
It is identified in figure: 1- bit body；2- fixing wing；21- PDC tooth；The water hole 3- or fixed nozzle；The passive rotation spray of 4-
Mouth；41- high pressure water hole；The high pressure center 411- water hole；42- nozzle contour line；43- bulge-structure；51- bit body inner flow passage；52-
High pressure runner；6- hydraulic pump；7- hydraulic motor；71- motor case；72- motor shaft；73- blade；8- bit cutting profile
Line；9- drill body contour line；10- ball.
Specific embodiment
Following non-limiting examples are for illustrating the present invention.
As shown in Figure 1, 2, the PDC drill bit of passive swivel nozzle, including bit body 1, fixing cutter are provided on a kind of wing
The wing 2 is provided with PDC tooth 21, water hole or fixed nozzle 3 in fixing wing, it is characterised in that: drill bit wing 21 up to
It is provided with a passive swivel nozzle 4 less, nozzle bore is provided on the wing, passive swivel nozzle and nozzle bore, which are formed, to be rotated
Connection, and the 8 difference in height d of cutting contour line of nozzle 4 and drill bit is more than or equal to 0, i.e. d >=0, and hydraulic horse is provided in bit body
Up to 7 and hydraulic pump 6.
Preferably, being provided at least three high pressure water hole 41, including 1 high pressure center water hole on passive swivel nozzle 4
411, as shown in Figure 3,4.
Preferably, passive swivel nozzle contour line 42 is circular arc, parabola, as shown in Figure 5.
Preferably, being provided at least three bulge-structure 43 on passive swivel nozzle 4, and bulge-structure 43 is uniformly distributed
On the circumference of nozzle, as shown in Figure 6.
Preferably, hydraulic motor is vane motor, and hydraulic pump is blade hydraulic pump, as shown in Figure 7.
Preferably, outer 1/3 region positioned at drill bit radial direction radius of passive swivel nozzle 4, as shown in Fig. 2,5.
Preferably, the angle theta value range of nozzle-axis and drill axis are as follows: 0≤θ≤90 °, nozzle offset amount S's
Value range are as follows:-D/8≤S≤D/8, wherein D is the diameter of drill bit, as shown in Fig. 1,8,9.
Preferably, passive swivel nozzle 4 realizes axial lock by ball 10, as shown in Figure 8.
Preferably, raised structural material includes that hard alloy, composite polycrystal-diamond, heat are steady on passive swivel nozzle
Determine impregnated piece of polycrystalline diamond, diamond, natural diamond impregnated piece, cubic boron nitride or ceramics.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. the PDC drill bit of passive swivel nozzle is provided on a kind of wing, including bit body, fixing wing, in fixing wing
It is provided with PDC tooth, water hole or fixed nozzle, it is characterised in that: at least provided with a passive rotation on the wing of drill bit
Nozzle is provided with nozzle bore on the wing, and passive swivel nozzle and nozzle bore, which are formed, to be rotatablely connected, and nozzle and drill bit are cut
It cuts contour line difference in height d and is more than or equal to 0, i.e. d >=0, hydraulic motor and hydraulic pump are provided in bit body.
2. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as described in claim 1, it is characterised in that: passive
At least three high pressure water hole, including 1 high pressure center water hole are provided on swivel nozzle.
3. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as described in claim 1, it is characterised in that: passive
Swivel nozzle contour line is circular arc, parabola.
4. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as described in claim 1, it is characterised in that: passive
At least three bulge-structure is provided on swivel nozzle, and bulge-structure is evenly distributed on the circumference of nozzle.
5. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as described in claim 1, it is characterised in that: hydraulic
Motor is vane motor, and hydraulic pump is blade hydraulic pump.
6. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as described in claim 1, it is characterised in that: passive
Outer 1/3 region positioned at drill bit radial direction radius of swivel nozzle.
7. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as described in claim 1, it is characterised in that: nozzle
The angle theta value range of axis and drill axis are as follows: 0≤θ≤90 °, the value range of nozzle offset amount S are as follows:-D/8≤S≤D/
8, wherein D is the diameter of drill bit.
8. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as described in claim 1, it is characterised in that: passive
Swivel nozzle realizes axial lock by ball.
9. being provided with the PDC drill bit of passive swivel nozzle on a kind of wing as claimed in claim 4, it is characterised in that: passive
Raised structural material includes hard alloy, composite polycrystal-diamond, thermally stable polycrystalline diamond, artificial diamond on swivel nozzle
Impregnated piece of stone, natural diamond impregnated piece, cubic boron nitride or ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820971082.8U CN208330198U (en) | 2018-06-22 | 2018-06-22 | The PDC drill bit of passive swivel nozzle is provided on a kind of wing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820971082.8U CN208330198U (en) | 2018-06-22 | 2018-06-22 | The PDC drill bit of passive swivel nozzle is provided on a kind of wing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208330198U true CN208330198U (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820971082.8U Expired - Fee Related CN208330198U (en) | 2018-06-22 | 2018-06-22 | The PDC drill bit of passive swivel nozzle is provided on a kind of wing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208330198U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533183A (en) * | 2018-06-22 | 2018-09-14 | 西南石油大学 | The PDC drill bit of passive swivel nozzle is provided on a kind of wing |
-
2018
- 2018-06-22 CN CN201820971082.8U patent/CN208330198U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533183A (en) * | 2018-06-22 | 2018-09-14 | 西南石油大学 | The PDC drill bit of passive swivel nozzle is provided on a kind of wing |
| CN108533183B (en) * | 2018-06-22 | 2023-08-15 | 西南石油大学 | PDC drill bit with passive rotary nozzle arranged on blade |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 Termination date: 20190622 |