CN202249771U - Wheel type drill for breaking rock in rotary cutting manner - Google Patents
Wheel type drill for breaking rock in rotary cutting manner Download PDFInfo
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- CN202249771U CN202249771U CN2011203157961U CN201120315796U CN202249771U CN 202249771 U CN202249771 U CN 202249771U CN 2011203157961 U CN2011203157961 U CN 2011203157961U CN 201120315796 U CN201120315796 U CN 201120315796U CN 202249771 U CN202249771 U CN 202249771U
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Abstract
The utility model discloses a wheel type drill for breaking rock in a rotary cutting manner. The drill comprises a drill main body, a cone and cutting teeth on the work surface of the cone, wherein an inclined angle beta between a cone shaft neck plane on the drill main body and the axis of the drill ranges from 0 degree to 90 degrees; and the offset of the shaft neck is shown in the specification, wherein D represents the diameter of the drill. The wheel type drill disclosed by the utility model is high in rock-breaking efficacy and long in drill service life.
Description
Technical field
The utility model belongs to technical equipment fields such as oil-gas drilling engineering, mining, geological drilling, construction work, construction of tunnel, shield structure and non-excavation, relates to a kind of wheel-type drill with the broken rock of rotary-cut mode specifically.
Background technology
Drill bit is directly to contact with rock in the drilling process, through the instrument of effect fractured rocks such as cutting, punching press.Widely used drill bit mainly contains rock bit (comprising single-cone rotary drill bit, tricone bit), PDC drill bit (Polycrystalline Diamond Compact Bits polycrystalline diamond compact bit) in the modern drilling engineering.Now, rock bit and PDC drill bit have all developed into quite high level, but still have some unsurmountable problems.The one, be afraid of reaming and reaming hole, make the rock bit of sealed bearing, particularly the PDC drill bit damages in advance; The 2nd, little to the motion of center, shaft bottom rock, insufficiency of function, the center rock is difficult for broken, influences the rate of penetration of drill bit, and rock bit and PDC bit central cloth tooth are few, easy to wear, also are the main causes that drill bit lost efficacy.
Broken rock form formed bottom rock through the tooth on the gear wheel and impacts the granulitization fractured rock for impacting the broken rock of crushing when tricone bit crept into, and formed hole diameter.Because the compressive strength of rock is much larger than shearing resistance and tensile strength, and tricone bit utilizes tooth that the percussion of rock is come brokenly rock, capacity usage ratio is not high.Particularly under high the pressure of the drill situation such as deep drilling, because the effect of highdensity drilling fluid, the cuttings hold-down effect in shaft bottom is obvious, and drill teeth is difficult to wedging rock and impact grinding rock, so efficiency of breaking rock is relatively low.
The tricone bit bearing life is one of principal element of restriction drilling life of bit, and bearing bears the load that the pressure of the drill causes, adds that tricone bit is with the broken rock of impulse form; The shock loading that bearing receives is big; The load amplitude is high, in addition the speed(-)up effect of tricone bit: greater than 1, the gear wheel rotating speed was greater than the drill bit drilling speed when promptly drill bit crept into for tricone bit wheel body speed ratio (ratio of gear wheel rotating speed and drill speed during drilling well); So the bearing rotating speed is very fast relatively, cause the bearing life of tricone bit shorter.
The gear wheel arrangement of double-cone bit is identical with three gear wheels, and each gear wheel work plane (cambered surface of cloth tooth) all is oppositely arranged, and promptly all is inside.Except causing above problem, from broken rock process of rock bit and movement locus analysis, tooth on the gear wheel and shaft bottom rock of borehole are less time of contact, and the distance of tooth slippage in the shaft bottom is also less, and the center efficiency of breaking rock is low, has influenced rate of penetration.
Single-cone rotary drill bit gear wheel shape is different from the conisphere shape (approximate hemispherical) of two gear wheels and three gear wheels, but subsphaeroidal, work plane is covered with whole sphere (work planes two, three gear wheels are the semicircle cambered surfaces).Rely on tooth to impact, the roll extrusion on stratum with scrape and cut three kinds of mode fractured rocks; Especially scrape that to cut travel direction all different at each position on gear wheel surface; The tooth of promptly different row's numbers in the shaft bottom along the track of different directions; Do the slippage of longer distance and cut the stratum, and form netted shaft bottom track.The characteristics of single-cone rotary drill bit are that the gear wheel rotating speed is low; Bearing size is bigger; Be superior to tricone bit application life, but single-cone rotary drill bit has the shortcoming that can't avoid: repetition fragmentation, chip removal difficulty take place in single-cone rotary drill bit meet the eye on every side easily in its broken rock process of structures shape.Tooth abrasion resistance wretched insufficiency, in case tooth blunt or broken teeth take place, rate of penetration sharply descends.
The broken rock form of PDC drill bit is the scraping rock, in drilling well, geology and even construction work, uses more and more widely, and the ratio of in drilling engineering, using is increasing.Under the ideal operation condition of center line of bit and hole axis coincidence, the movement locus of each cutting teeth was relatively-stationary concentric circles endless belt when drill bit crept into.Because its rock breaking mechanism and architectural difference, the PDC drill bit is applicable to higher drilling speed and soft to medium ground.Its deficiency mainly contains following aspect:
1. downhole condition requires high: if there is foreign matter in the shaft bottom, can causes the PDC drill bit to produce and collapse tooth or thermal friction phenomenon, temperature raises and burns black carcass, even the fusing brazing layer, produces the tooth phenomenon, influences rate of penetration, quickens drill bit and loses efficacy.
2.PDC the serious consequence that tooth lost efficacy: compare with rock bit, the load of PDC tooth was accelerated its rate of wear near the inefficacy of the indivedual teeth of PDC drill bit (fall tooth, collapse tooth etc.) can seriously increase, and the aggravation drill bit lost efficacy.
3. heart portion efficiency of breaking rock is not high: the rate of wear obvious difference of the PDC tooth on the different radial zones of PDC drill bit, and outer shoulder rock cutting ratio is big, and the rate of wear is fast.It is low that the PDC of heart portion toe joint touches efficiency of breaking rock, and it is then slower to wear and tear.
The utility model content
Defective in view of the PDC drill bit; The utility model improves to rock bit; A kind of wheel-type drill with the broken rock of rotary-cut mode is proposed; Solve existing two, the tricone bit capacity usage ratio is low, efficiency of breaking rock is low, bearing life is short, drilling efficiency is low, and single cone is met the eye on every side problems such as chip removal difficulty, tooth that structure causes wear no resistance.
The drill bit of the utility model with the rotary-cut mode impact, crushing, rock cutting, realize broken rock, improve the bit bearing structure simultaneously, increase drilling life of bit when guaranteeing to improve efficiency of breaking rock.
For addressing the above problem, the technical scheme of the utility model is following:
A kind of wheel-type drill with the broken rock of rotary-cut mode; Comprise the cutting teeth (3) on drill main body (1), gear wheel (2), the gear wheel work plane; Gear wheel (2) is gone up roller axle neck formation with drill main body (1) and is rotationally connected; It is characterized in that: the scope that main body (1) goes up roller axle neck plane and the wheel body angle β of drill axis is 0 °＜β＜90 °, and the axle journal side-play amount is
wherein D be bit diameter.
The wheel body angle β of said gear wheel axle journal plane and drill axis
i=β
I+1Or β
i≠ β
I+1, axle journal side-play amount s
i=s
I+1Or s
i≠ s
I+1, wherein, i is the sequence number (i>=1) of gear wheel, the corresponding wheel body angle of wheel i is β
i, the corresponding axle journal side-play amount of wheel i is s
i
The scope of described wheel body angle β is 15 °≤β≤85 °.
The scope of described axle journal side-play amount s is
Said gear wheel is with drill main body centrosymmetric two.
Said gear wheel is with drill main body centrosymmetric three.
The aforementioned cutting teeth running orbit that has a gear wheel at least reaches or crosses the drill axis position.
Wheel body angle β and axle journal side-play amount s are as shown in Figure 2, and the gear wheel work plane is towards the borehole wall and shaft bottom.
Towards the borehole wall or shaft bottom, in the broken rock process, the center efficiency of breaking rock is improved at inner row teeth (being the great circle tooth) center, machinable shaft bottom to the said rotary-cutting type drill bit of the utility model with gear wheel; Every circle tooth on the gear wheel can impact crushing cutting shaft bottom and rock of borehole with the rotary-cut mode, and this is the core of the utility model.
According to above-mentioned utility model, manufactured experimently out rotary-cutting type simulation drill bit in September, 2010, and on stand, tested.The shaft bottom profile that rotary-cutting type simulation drill bit gets out is different fully with the shaft bottom profile that tricone bit and PDC drill bit get out.The zone of fracture of tricone bit and PDC drill bit all is a concentric circles, and the zone of fracture of the rotary-cut drill bit of the utility model is into the helix of chrysanthemum shape.Helix is intensive and disappearance at borehole wall place, has proved that fully each toothrow can both cut the shaft bottom and the borehole wall on the gear wheel, forms hole diameter.Inner row teeth zone of fracture spiral line length, outer rows of teeth zone of fracture helix is short, and the operating load of outer rows of teeth is more even in can making.
The zone of fracture of helix is explained rotary-cutting type drill bit rock breaking mechanism, and the existing impact granulitization of every toothrow again can rock cutting.Improve the center efficiency of breaking rock simultaneously, thereby improve the drill bit rate of penetration.
Since the broken rock mode characteristics of rotary-cutting type drill bit, thus various drilling well needs can be adapted to, more more superior than existing rock bit and diamond bit in sidetracking and horizontal well drilling.
According to above analysis, axle journal side-play amount s increases, and can increase radial slippage and the axial slip of cutting teeth in the shaft bottom, promptly increases the total slippage of cutting teeth in the shaft bottom.Wheel body angle β span is: 15 °≤β≤85 °, axle journal side-play amount s span is:
can realize better that cutting teeth is with the broken rock of rotary-cut mode.Optimize s and β, can reach increase gear wheel cutting teeth, reduce the purpose of wheel body speed ratio in shaft bottom and borehole wall slippage.Be set to 30 ° such as wheel body angle β.
Rotary-cut bit cone compound mode comprises (but being not limited to) following type:
1, two gear wheels: two gear wheel work planes outwardly; Angular range and deviant all in 0 °＜β＜90 °,
scope, center, offset direction symmetry.The inner row teeth of two gear wheels (being the great circle tooth) is arranged to all not cut the heart simultaneously, and (cut the heart: tooth is cut to the well center; The outmost turns cutting teeth running orbit that is gear wheel reaches the drill axis position; In other words outmost turns cutting teeth lengthwise position through or surpass drill axis); Can be set to one cuts one in the heart and does not cut the heart (distance at adjustment great circle tooth pitch gear wheel edge); It is all unlimited near cutting the heart also can be set to two gear wheels, relies on impact force and rock mass internal stress fragmented rock body center (directly the well center area of smear metal has not been infinitely close to zero) of drill bit.
2, three gear wheels: three gear wheel work planes outwardly; Angular range and deviant all in 0 °＜β＜90 °,
scope, center, offset direction symmetry.The inner row teeth of three gear wheels (being the great circle tooth) all is made as and does not cut the heart.Can be used for reaming.
3, single cone; The gear wheel work plane outwardly; Angular range and deviant are in 0 °＜β＜90 °,
scope, and the inner row teeth of single cone (being the great circle tooth) is made as and cuts the heart.
The described cutting teeth of the utility model (3) is scoop chisel insert, chisel teeth, blunt conical-ended shape insert, hemi-spherical ended shape insert, frustum tooth, cylinder butt tooth or pyramid tooth; Described cutting teeth (3) material comprises carbide alloy, polycrystalline diamond complex, TSP, impregnated with diamond, natural diamond, cubic boron nitride or pottery, or comprises carbide alloy, diamond and cubic boron nitride.Said drill main body (1) is the sintered body of steel part, steel group welding piece or steel body and metal dust.Described gear wheel (2) structure has the sintering gear wheel of mill teeth gear wheel, insert cone or steel body and metal dust.
The utility model performance characteristics compared with prior art is:
(1) rotary-cut mode is broken rock: in the rotary-cut drill bit drilling process of the utility model; Gear wheel axle journal on the main body (1) points to the borehole wall or shaft bottom; Handing over the angle drill axis that squints again with the rotary-cut drill axis (is β ≠ 0 °; S ≠ 0) time, rotary-cut bit cone (2) with the rotary-cut mode impact, crushing, rock cutting, realize that broken rock creeps into.Drilling process rotary-cut bit cutting tooth (3) not only rolls along with gear wheel, forms the crushing to the stratum, and through its slipping cutting stratum in the shaft bottom, efficiency of breaking rock is high simultaneously.According to different drilling well demands; Change wheel body angle β, axle journal side-play amount s and gear wheel (2) size and dimension; Can make the cutting teeth (3) of respectively arranging on the gear wheel (2) all be cut to corresponding well center, well edge and the borehole wall, can also get out the bottom hole pattern of requirement.
(2) the broken lithology in center can be high: in the drilling process; The well center that the rotary-cut drill bit is corresponding is accomplished by the great circle tooth; Because the bull gear diameter is maximum in the rotary-cut bit cutting gear ring; The number of teeth many (the central cloth tooth of comparable tricone bit is many more than 6 times), relative cutting speed is high, can fundamentally solve present tricone bit and the low problem of PDC drill bit heart portion's efficiency of breaking rock.
(3) rate of penetration improves: the structure of rotary-cut drill bit (key parameter comprises wheel body angle β and axle journal side-play amount s) determined its broken rock form be impact, smash, shear action; Corresponding simultaneously well center efficiency of breaking rock and aggressive height; Avoid the problem of meeting the eye on every side and repeated broken phenomenon; Be beneficial to chip removal, improve the drill bit rate of penetration.
(4) better dynamic performance: with the broken petrofacies ratio of rock bit impulse form, the broken rock form of rotary-cut drill bit for impacts, smash, shear action, the shock loading that continuous shear action receives drill bit is little, the reduction of load amplitude.Simultaneously less than 1, the gear wheel rotating speed was less than the drill bit drilling speed when promptly drill bit crept into for the rotary-cut drill bit wheel body speed ratio ratio of drill speed (the gear wheel rotating speed with), so the bearing rotating speed is relatively slow, the rotary-cut drill vibration impacts and reduces.Compare with common PDC drill bit, rotary-cut drill bit torsional oscillation reduces, and sticking cunning under the slow-speed of revolution and the well spiral phenomenon under the high rotating speed reduce.In the platform experiment result that the utility model carries out, also proved with unidimensional, compare with the rock bit under the working condition, PDC drill bit, the rotary-cut drill bit possesses These characteristics.Better dynamic performance makes the rotary-cut drill bit have the bigger scope of application and better control ability.
(5) the wheel body speed ratio less than 1, bearing life improvement of terms, rotary-cut bit life improve: the wheel body speed ratio of rotary-cut drill bit is less than 1; And the journal size of gear wheel can design greatlyyer than the tricone bit of same specification, having a clear superiority in than rock bit aspect the intensity of axle journal and the drilling life of bit.The rotary-cut drill bit of the utility model is in broken rock process; The shaft bottom and the borehole wall making a concerted effort of producing promote gear wheel to drill bit and are close to the axle journal plane; This helps improving the bearing seal performance; Improve bearing application life,, thereby realize the raising of rotary-cut bit life based on the significance of bearing life for drill bit.
(6) protect the footpath effect: all cutting gear rings of rotary-cut drill bit can both cut the shaft bottom and the borehole wall, form hole diameter.Shorten if cut that circle odontotripsis of the borehole wall at first, the work that the second circle tooth will be taken over the first lap tooth realizes protecting the footpath, and unlikely boring is more and more littler.If the second circle tooth is wear out failure also, the 3rd circle tooth still can realize protecting the footpath, by that analogy.Can both cut the corresponding hole diameter of rotary-cut drill bit because the rotary-cut drill bit of the utility model has all gear rings, make it have tricone bit guarantor footpath and sidetracking ability can't be obtained, it is effective to protect the footpath.
(7) owing to be provided with deviant, phenomenon can not appear meeting the eye on every side in drilling well, has solved the chip removal problem and has repeated the smear metal problem.
(8) tooth can adopt composite teeth: the wheel-type drill with the broken rock of rotary-cut mode can utilize carbide cutting tooth, TSP composite teeth (PDC), impregnated with diamond cutting teeth etc. as cutting teeth, and the working life of tooth and stock-removing efficiency all are superior to single-cone rotary drill bit.
The beneficial effect of the utility model: the cutting teeth of the utility model is with the broken rock of rotary-cut mode, and the center efficiency of breaking rock is high, and it is effective to protect the footpath, weares and teares evenly, and the bearing working improvement of terms, rate of penetration is high, and drilling life of bit is long.
Description of drawings
Fig. 1 adopts the structural representation of two gear wheels for the utility model;
Fig. 2 is that the cutting principle and the main design parameters of the utility model concerns sketch map;
Fig. 3 is the hat roof construction sketch map of an instance of the utility model;
Fig. 4 is the gear wheel gear ring perspective view of an instance of the utility model;
Fig. 5-Fig. 9 is the gear wheel gear ring perspective view of 5 instances of the utility model.
Further set forth the utility model specific embodiment in detail below in conjunction with accompanying drawing.
The specific embodiment
Like Fig. 1～shown in Figure 9: the wheel-type drill with the broken rock of rotary-cut mode, comprise drill main body (1), gear wheel (2), cutting teeth (3), also can add oil storage bag (4), nozzle (5).Drill main body (1) comprises the gear wheel axle journal, and wiper block, high-pressure slurry passage and thread can also be arranged.Gear wheel (2) is gone up roller axle neck formation with main body (1) and is rotationally connected, with axle journal employing tricone bit bearing and the hermetically-sealed construction commonly used on the main body (1).The big small end of holding of gear wheel (2) is arranged many circle cutting teeths.The scope that main body (1) goes up roller axle neck plane and drill axis angle β (hereinafter to be referred as the wheel body angle) is that 0 °＜β＜90 ° (comprise β
i=β
I+1And β
i≠ β
I+1), the scope of axle journal side-play amount s does
(comprise s
i=s
I+1And s
i≠ s
I+1), wherein, the corresponding wheel body angle of wheel i is β
i, the corresponding axle journal side-play amount of wheel i is s
i, D is a bit diameter.Wherein cutting principle of the utility model shown in Figure 2 and main design parameters: the relation of wheel body angle β, axle journal side-play amount s, bit diameter D; Gear wheel number shown in Figure 3 is 2; Wheel body angle β=30 °; Axle journal side-play amount
and a gear wheel are cut heart portion, the example a when gear wheel is not cut heart portion; Fig. 4 is 2 for the gear wheel number, wheel body angle β=30 °, axle journal side-play amount s=0, and the example of two gear wheels when all cutting heart portion; Fig. 5 is 2 for the gear wheel number, wheel body angle β=89.5 °, axle journal side-play amount s=0, and the example of two gear wheels when all cutting heart portion; Fig. 6 is 1 for the gear wheel number; Wheel body angle β=30 °, the example when axle journal side-play amount
and gear wheel are cut heart portion; Fig. 7 is 2 for the gear wheel number; Wheel body angle β=30 °; Axle journal side-play amount
and one cut heart portion, an example of not cutting heart portion; Fig. 8 is 2 for the gear wheel number; Wheel body angle β=30 °, axle journal side-play amount
and two gear wheels are not cut the example of heart portion; Fig. 9 is 3 for the gear wheel number; Wheel body angle β=30 °, the example when axle journal side-play amount
and three gear wheels are not cut heart portion;
Embodiment 1:
When β=30 of the rotary-cut drill bit of the utility model °,
Diameter D=4.75 ", when drilling speed was n=180rpm, experiment was selected Hongya stone: 225 * 200 * 150mm respectively for use with material
3, green sandstone: 150 * 150 * 100mm
3, experimentation is collected landwaste, analyzes broken rock complexity and vibration situation, inspection cutting teeth polishing scratch and direction, the wheel body speed ratio of calculating gear wheel and drill bit.
Embodiment result and Theoretical Calculation show simultaneously: under the embodiment 1 corresponding parameter condition, the wheel body speed ratio is less than 1, in the present embodiment less than 0.55; Lithology is hard more, and the gear wheel rotating speed is high more, and the wheel body speed ratio is high more.
Embodiment 2:
When β=30 of gear wheel 2 °,
Diameter D=4.75 ", drilling speed is n=180rpm, experiment is respectively Hongya stone: 225 * 200 * 150mm with material
3, green sandstone: 150 * 150 * 100mm
3, experimentation is collected landwaste, analyzes broken rock complexity and vibration situation, inspection cutting teeth polishing scratch and direction, the wheel body speed ratio of calculating gear wheel and drill bit.
Embodiment result and Theoretical Calculation show simultaneously: when corresponding
; Lithology is hard more; The gear wheel rotating speed reduces, and the wheel body speed ratio is less than the value of embodiment 1 correspondence.
The comprehensive above-mentioned result of implementation of comparative analysis can get: optimize wheel body angle β and axle journal side-play amount s, can reach increase the gear wheel cutting teeth in the shaft bottom purpose with borehole wall slippage, reduction wheel body speed ratio, the efficiency of breaking rock and the rate of penetration of raising rotary-cut drill bit.
Embodiment 3: gear wheel is one
The gear wheel work plane is between the borehole wall and shaft bottom; The scope that main body (1) goes up roller axle neck plane and drill axis angle β is 0 °＜β＜90 °, and the axle journal side-play amount is cut the heart for
gear wheel great circle tooth.
Claims (10)
1. wheel-type drill with the broken rock of rotary-cut mode; Comprise the cutting teeth (3) on drill main body (1), gear wheel (2), the gear wheel work plane; It is characterized in that: the scope that drill main body (1) is gone up roller axle neck plane and the wheel body angle β of drill axis is 0 °＜β＜90 °, and the axle journal side-play amount is
wherein D be bit diameter.
2. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 1 is characterized in that: the wheel body angle β of said gear wheel axle journal plane and drill axis
i=β
I+1Or β
i≠ β
I+1, axle journal side-play amount s
i=s
I+1Or s
i≠ s
I+1, wherein, i is the sequence number (i>=1) of gear wheel, the corresponding wheel body angle of wheel i is β
i, the corresponding axle journal side-play amount of wheel i is s
i
3. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 1 and 2 is characterized in that: the scope of described wheel body angle β is 15 °≤β≤85 °.
4. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 3, it is characterized in that: described wheel body angle β is 30 °.
5. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 1 and 2, it is characterized in that: the scope of described axle journal side-play amount s is
6. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 1 and 2 is characterized in that: the wheel body speed ratio be the gear wheel rotating speed with the ratio of drill speed less than 1.
7. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 2, it is characterized in that: gear wheel is one.
8. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 2 is characterized in that: gear wheel is centrosymmetric two with drill main body.
9. a kind of wheel-type drill with the broken rock of rotary-cut mode according to claim 2 is characterized in that: gear wheel is centrosymmetric three with drill main body.
10. according to the arbitrary described a kind of wheel-type drill of claim 7-9, it is characterized in that: have at least the cutting teeth running orbit of a gear wheel to reach or cross the drill axis position with the broken rock of rotary-cut mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203157961U CN202249771U (en) | 2011-08-26 | 2011-08-26 | Wheel type drill for breaking rock in rotary cutting manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203157961U CN202249771U (en) | 2011-08-26 | 2011-08-26 | Wheel type drill for breaking rock in rotary cutting manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249771U true CN202249771U (en) | 2012-05-30 |
Family
ID=46111030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203157961U Expired - Fee Related CN202249771U (en) | 2011-08-26 | 2011-08-26 | Wheel type drill for breaking rock in rotary cutting manner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364031A (en) * | 2011-08-26 | 2012-02-29 | 四川深远石油钻井工具有限公司 | Wheel type drill bit for breaking rock by rotary cutting |
-
2011
- 2011-08-26 CN CN2011203157961U patent/CN202249771U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364031A (en) * | 2011-08-26 | 2012-02-29 | 四川深远石油钻井工具有限公司 | Wheel type drill bit for breaking rock by rotary cutting |
| CN102364031B (en) * | 2011-08-26 | 2015-07-01 | 四川深远石油钻井工具股份有限公司 | Wheel type drill bit for breaking rock by rotary cutting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 611731, No. 4, West core road, hi tech Zone, Sichuan, Chengdu, B332 Patentee after: Sichuan Deep&Fast Oil Drilling Tools Co., Ltd. Address before: 611730 Sichuan city of Chengdu Province modern industrial port area Tonggang Road No. 69 Patentee before: Sichuan Deep&Fast Oil Drilling Tools Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: SICHUAN DEEP + FAST OIL DRILLING TOOLS CO., LTD. Free format text: FORMER NAME: SICHUAN DEEP+FAST OIL DRILLING TOOLS CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 611731, No. 4, West core road, hi tech Zone, Sichuan, Chengdu, B332 Patentee after: Sichuan Deep & Fast Oil Drilling Tools Co., Ltd. Address before: 611731, No. 4, West core road, hi tech Zone, Sichuan, Chengdu, B332 Patentee before: Sichuan Deep&Fast Oil Drilling Tools Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20150826 |
|
| EXPY | Termination of patent right or utility model |