CN203201473U - Composite drill of palm back cutting structure - Google Patents
Composite drill of palm back cutting structure Download PDFInfo
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- CN203201473U CN203201473U CN2013200695872U CN201320069587U CN203201473U CN 203201473 U CN203201473 U CN 203201473U CN 2013200695872 U CN2013200695872 U CN 2013200695872U CN 201320069587 U CN201320069587 U CN 201320069587U CN 203201473 U CN203201473 U CN 203201473U
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- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 230000036346 tooth eruption Effects 0.000 claims abstract description 110
- 239000011435 rock Substances 0.000 abstract description 56
- 238000005553 drilling Methods 0.000 abstract description 18
- 238000010276 construction Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 210000000515 tooth Anatomy 0.000 description 45
- 239000004744 fabric Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 229910003460 diamond Inorganic materials 0.000 description 5
- 239000010432 diamond Substances 0.000 description 5
- 150000001875 compounds Chemical group 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 208000002697 Tooth Abrasion Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 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
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- 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
- E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
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- 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
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
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- Earth Drilling (AREA)
Abstract
The utility model discloses a composite drill of a palm back cutting structure, and belongs to the technical field of oil and gas, mine engineering, building foundation engineering construction, geology, hydrology and other drilling equipment. The composite drill comprises a drill body and a disc knife, wherein the drill body is provided with a wheel palm, the disc knife is arranged on the wheel palm and in rotary connection with the wheel palm, disc knife cutting teeth are arranged on the disc knife, the absolute value of the deviation angle alpha of the disc knife is greater than or equal to 20 degrees and less than or equal to 90 degrees, palm back cutting teeth are distributed on the palm back of the wheel palm, and the wheel palm and the palm back cutting teeth form a palm back cutting structure. The drill body is provided with at least one set of disc knife cutting unit and at least one set of palm back cutting structure, wherein the disc knife cutting unit is composed of the disc knife and the wheel palm, and the palm back cutting structure is composed of the wheel palm and the palm back cutting teeth. The composite drill can enhance gauge protection performance, increases real-time tooth distribution density, and saves geometric space. Net cross scrapping, to rock, of the cutting teeth is achieved or enhanced in an outer radial area, rock breaking efficiency of the drill is improved, and meanwhile the service life of the drill is prolonged.
Description
Technical field
The utility model belongs to drilling equipment technical fields such as petroleum gas, mine engineering, building foundation engineering construction, geology, the hydrology, relates to a kind of composite drill bit with palm back of the body cutting structure concretely.
Background technology
Drill bit be in the drilling engineering in order to fractured rock, form the rock crushing tool of pit shaft.Employed drill bit mainly contains rock bit (comprising tricone bit and single-cone rotary drill bit) and PDC(composite polycrystal-diamond in the drilling engineering now) drill bit.
Tricone bit is mainly with the broken rock of the form of impacting crushing, the wheel body speed ratio of tricone bit (ratio of gear wheel rotating speed and drill speed during the drill bit rotary drilling) is all greater than 1, the gear wheel rotating speed is fast during the drill bit rotary drilling, and the tooth on the gear wheel forms bottom rock and impacts granulitization.The compressive strength of rock is all much higher than shear strength and tensile strength, and tricone bit utilizes tooth that the punching press of rock is used for brokenly rock, and capacity usage ratio is not high, and efficiency of breaking rock is relatively low.Bearing life is low to be one of the principal element in restriction tricone bit application life.Because tricone bit is the broken rock of form that impacts crushing, the impact that bearing is subjected to is big, load amplitude height, and the bearing rotating speed is very fast relatively in addition, so the bearing life of tricone bit is shorter.The gear wheel deviation angle of existing rock bit is scarcely above 5 °, drill bit when the rotary drilling of shaft bottom, wheel body speed ratio height, gear wheel is fast around the velocity of rotation of bit leg journel, the contacted time of tooth on the gear wheel and bottom rock is very short, and tooth is also very short in the distance of shaft bottom slippage.
The single-cone rotary drill bit bearing size is bigger, and the gear wheel rotating speed is low, and the life-span is better than tricone bit.But single-cone rotary drill bit also has a unavoidable weakness, and that is exactly tooth abrasion resistance wretched insufficiency, in case the tooth blunt, drilling speed will sharply reduce.
Now, movement-less part, long PDC(composite polycrystal-diamond of wear-resisting and life-span) drill bit uses more and morely in drilling engineering, and ratio is increasing.Existing P DC drill bit all belongs to fixed cutter drill bits, arranges and is cemented on the drill body according to certain rules as the composite polycrystal-diamond (be the PDC tooth, also be called for short tooth) of cutting element, constitutes the cutting structure of PDC drill bit fractured rock.
Under desirable condition of work (being the condition that center line of bit overlaps with hole axis), to be responsible for broken zone be relatively-stationary concentric circles endless belt to each cutting teeth when drill bit crept into.This fixed teeth PDC drill bit mainly contains the shortcoming of three aspects:
First, the PDC tooth is rock cutting continuously, because violent fricative heat can make tooth reach quite high temperature, when temperature delimits above one, the rate of wear of PDC tooth obviously rises, thereby cause the generation of (when PDC tooth operating temperature was higher than a certain specified temp, the phenomenon that its abrasion resistance obviously descends was called the thermal wear phenomenon of PDC tooth) of thermal wear phenomenon.
The second, the inefficacy of indivedual teeth on the drill bit (the coming off of tooth, fracture or excessive wear etc.) can significantly increase near the live load of the PDC tooth the endless belt of inefficacy tooth shaft bottom, accelerates its rate of wear, and then causes drill bit to lose efficacy in advance.
The 3rd, the rate of wear difference of the PDC tooth on the different radial zones of drill bit is obvious, and the cutter-wear rate in general bit exterior zone (particularly outer 1/3 zone of drill bit radius) is obviously faster than the tooth in heart portion zone.
" a kind of wheel-type drill with the broken rock of cutting way " (China Patent No.: main cutting structure 201010229375.7) is runner cutting unit (but also pan of a steelyard cutter cutting unit).The main cutting structure of this drill bit only is made up of runner (but also pan of a steelyard cutter), although the alternation of dise knife cutting teeth has outstanding technical advantage, also has the following disadvantages: one, protect weakness of footpath ability.When wearing and tearing take place the dise knife cutting teeth, will be dwindled by the determined bit diameter of dise knife cutting teeth thereupon.Usually it is all bigger to scrape the cutting teeth wear extent of cutting the common permission of class drill bit, so the guarantor of wheel-type drill directly is a tangible weakness.They are two years old, because there is certain space width in cutting teeth on the dise knife, real-time cloth tooth density is (on unit bit diameter or the unit shaft bottom area on the drill bit, the same time participates in the quantity of the cutting teeth of broken rock work) less, though the cutting teeth total amount of arranging on the dise knife is more, but participate in the cutting teeth negligible amounts of broken rock work simultaneously, make the land workspace field width of cutting teeth on the one hand, be difficult for the wedging rock; On the other hand, the dise knife cutting teeth is scraped and is not scraped the protuberance rock (phacolith) that switches to when cutting brokenly rock between the cutting teeth and may may wear to the dise knife body, and this can influence the permanent tooth reliability of cutting teeth on the dise knife and the application life of dise knife and drill bit.
(China Patent No.: 201010229371.9) set up stationary cutting structure on the basis of dise knife cutting unit, the main cutting structure of drill bit is by the dise knife cutting unit and stationary cutting structure is compound forms " a kind of combined drill with the broken rock of cutting way ".This composite drill bit structure can remedy the deficiency of above-mentioned wheel-type drill, but still has tangible deficiency aspect the utilizing of cloth tooth space.Under the extremely limited condition in cloth tooth space, the space be wasted in the sacrifice that just means bit performance to a great extent, this design for bit cutting structure and hydraulic structure all is very disadvantageous.The existence of this shortcoming has restricted the structure design of drill bit to a great extent, and the service behaviour of drill bit has been caused adverse effect.
The utility model content
The purpose of this utility model is: a kind of composite drill bit with palm back of the body cutting structure is provided, strengthen the bit gauge protection ability, increase the real-time cloth tooth density of drill bit, save drill bit cloth tooth space, particularly strengthened the cloth tooth in bit cutting tooth zone easy to wear (radially outer zone), and realize in this zone or strengthened cutting teeth and the netted intersection of rock is scraped cut, make the friction durability of cutting teeth and the wedging ability of rock is all got a promotion, when improving the drill bit efficiency of breaking rock, prolong drilling life of bit.
The purpose of this utility model realizes by following technical proposals:
A kind of composite drill bit with palm back of the body cutting structure, comprise drill body, dise knife, has the wheel palm on the described drill body, described dise knife is installed in the wheel palm and is rotationally connected with the formation of the wheel palm, be furnished with the dise knife cutting teeth at described dise knife, the scope of the offset angle of described dise knife be 20 °≤| α |≤90 °, be furnished with palm back of the body cutting teeth at described palm back of taking turns the palm, take turns the palm and palm back of the body cutting teeth formation palm back of the body cutting structure, have at least one on the described drill body and carry on the back cutting structure by the described palm of taking turns with the palm that palm back of the body cutting teeth constitutes with at least one by the dise knife cutting unit that described dise knife and the wheel palm constitute.
In the said structure, the offset angle of described dise knife=
, wherein s is the wheelbase that moves of dise knife, c is the stand-off of dise knife.As Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, AB is drill bit central axis, CD is the dise knife central axis, be dise knife pole axis face A1 through dise knife axis CD and the face that is parallel to drill axis AB, A2 is through drill axis AB and perpendicular to the plane of dise knife pole axis face A1, and A3 is through drill axis AB and is parallel to the plane of dise knife pole axis face A1.The point that characterizes each cutting teeth position coordinates on the dise knife is the anchor point of each cutting teeth, and the anchor point of cylindrical PDC tooth is the central point of the diamond working face of tooth, and the anchor point of other type cutting teeth is arranged on certain specified point of tooth.Generally, on dise knife, the plane A4 that dise knife effluxes each cutting teeth anchor point place on the gear ring is the dise knife reference plane to the cutting teeth on the dise knife with an arranged in form of enclosing, and the intersection point E of dise knife reference plane A4 and dise knife axis CD is the dise knife reference point.Cross some E and make vertical line to drill axis AB, intersection point is F.Dise knife stand-off c is dise knife reference point E to the distance of plane A2, and dise knife moves wheelbase s and is distance between drill axis AB and the dise knife pole axis face A1.During to bit adapter hand of spiral (namely contrary drill bit drilling direction), the offset angle of dise knife is the angle between straight line EF and the plane A3 along drill axis from dise knife, namely have offset angle=
, the value of α is (to contain 0 ° and 90 °) between 0～90 °.According to the difference of dise knife offset direction, deviation angle can be on the occasion of, also can be negative value.Being defined as of dise knife deviation angle sign: see along creeping into opposite direction with drill bit, and make the E point be positioned at the below (as Fig. 5, Fig. 6) of plane A3, if E point is in the left side on A2 plane, then deviation angle is just (as shown in Figure 5), otherwise is to bear (as shown in Figure 6).If the E point is on the A3 plane, deviation angle equals 0 °; If the E point is on the A2 plane, then deviation angle equals 90 ° (or-90 °).When the absolute value of deviation angle equaled 90 °, it was identical just to be offset the effect of moving with negative bias.
The offset angle of dise knife=
, | α | it is more obvious that the cutting teeth on the more big dise knife is cut effect scraping of shaft bottom.The scope of the offset angle of dise knife 20 °≤| α | in the time of≤90 °, can realize that all drill bit creeps into cutting teeth on the hour indicator cutter and scrapes in turn with the form that slowly replaces and cut brokenly rock.
In the utility model, the broken rock mode that has adopted palm back of the body cutting structure to combine with dise knife: dise knife and palm back of the body cutting structure are to scrape the cutting structure of the broken bottom rock of butt formula, cutting teeth on the palm back of the body cutting structure is scraped the Cutting trajectory that cuts out concentric circles at bottom rock, and the cutting teeth on the dise knife is scraped at bottom rock and cut out from outside to inside or from inside to outside spirality Cutting trajectory.Two cover Cutting trajectories intersect mutually, and its effect is to form netted shaft bottom pattern, is conducive to cutting teeth to effective wedging of rock, is conducive to the fragmentation of rock, is conducive to reduce the thermal wear of cutting teeth; And palm back of the body cutting structure can obviously improve the guarantor footpath ability of drill bit, and increases the real-time cloth tooth density of drill bit, reduces or avoids bottom rock to the wearing and tearing of dise knife body; And can save the drill bit geometric space, bit performance can thereby be improved.Therefore, the utility model can effectively improve the efficiency of breaking rock of drill bit and protect the footpath performance, strengthens drilling life of bit simultaneously.
For fixed cutter drill bits, cutting teeth cuts bottom rock continuously, the rate of wear difference of the PDC tooth on the different radial zones of drill bit is fairly obvious, and the rate of wear of general bit exterior zone (particularly outer 1/3 zone of drill bit radius) cutting teeth is obviously faster than the tooth in heart portion zone.Cutting teeth in this patent on the flywheel knife is easy to wear overlapping with failed areas at the bit cutting tooth with the cutting teeth of palm back, this zone is play strengthen the improvement effect.Cutting teeth on the flywheel knife is scraped in turn with the form that slowly replaces and is cut brokenly rock, the actual participation cutwork of each cutting teeth obviously be less than the duration of runs of drill bit total time, so the rate of wear of cutting teeth significantly reduces.The reduction meeting of cutter-wear rate causes direct influence to the cutting teeth on the palm back of the body cutting structure on the flywheel knife, slows down its rate of wear.
And because the cutting teeth on the flywheel knife is to scrape butt formula fractured rock, the required the pressure of the drill of flywheel knife is less relatively, the pressure of the drill fluctuating range is also less, and the wheel body speed ratio of flywheel knife cutting unit is lower than tricone bit, so the flywheel knife cutting unit can reach the bearing life higher than tricone bit.
The utility model compared with prior art, its beneficial effect is:
(1) cutting teeth on the utility model palm back of the body cutting structure can obviously strengthen the guarantor footpath ability of drill bit, can better solve " wheel-type drill " and only protect the difficult problem in footpath with the dise knife for the main cutting structure; Simultaneously, palm back of the body cutting structure has increased the real-time cloth tooth of drill bit density, can obviously reduce or avoid the wearing and tearing of dise knife body, prolongs drilling life of bit.
(2) the utility model utilizes the palm back of the body space of the wheel palm effectively and reasonably, cutting teeth forms palm back of the body stationary cutting structure by directly arrange fixedly at palm back, saved preciousness on the drill bit and limited space, the cloth tooth in bit cutting tooth zone easy to wear (radially outer zone) is significantly strengthened, even and if provide a kind of wing that do not adopt fixedly can realize that also the dise knife cutting structure is mutually compound with stationary cutting structure, and then realizing that netted intersection scrapes the technological approaches of cutting brokenly the rock mode, therefore the service behaviour of drill bit can be improved.
(3) the utility model is when combining dise knife and palm back of the body cutting structure, also combine with the fixing cutting structure of wing, corresponding bottom rock forms or has strengthened netted intersection and scrapes and cut in drill bit radially outer zone, cutting force and the cutting power of this zone cutting teeth are all reduced, frictional heat reduces, be conducive to slow down the rate of wear of cutting teeth, also be conducive to cutting teeth to the fragmentation of wedging and the rock of rock, can when improving the drill bit efficiency of breaking rock, prolong drilling life of bit.
(4) the cutting teeth alternation on the dise knife, even, the good cooling results of cutting teeth wearing and tearing has prolonged drilling life of bit.
(5) the utility model can utilize diamond composite components such as PDC composite sheet as cutting teeth, and the working life of tooth and stock-removing efficiency all are better than single-cone rotary drill bit.
(6) all to scrape the broken rock work of the form of cutting, the pressure of the drill required when creeping into is little for cutting teeth of the present utility model, and the suffered load of bearing is little, and the load fluctuation amplitude is low; The wheel body speed ratio of dise knife cutting unit is low, lacks so bearing relatively rotates slowly, generates heat.So the bearing working life-span of the present utility model is longer than the tricone bit of equal specification.
As optimal way, described drill body is provided with and comprises the fixedly stationary cutting structure of cutting teeth.
In the such scheme, when bit size is big, can bit body be provided with and comprises the fixedly stationary cutting structure of cutting teeth, with the cloth tooth density of increase drill bit.When creeping in than hard formation, the stationary cutting structure of increase can increase the friction durability of drill bit.
As optimal way, described dise knife cutting unit has two at least, wherein has at least the deviation angle of dise knife of the deviation angle of dise knife of a dise knife cutting unit and other dise knife cutting unit unequal.
In the such scheme, the zone that the dise knife of different deviation angles covers in the shaft bottom is difference, working region that can the broken rock of reasonable distribution dise knife.
As optimal way, described dise knife cutting unit has two at least, wherein has at least the dise knife cutting profile of a dise knife cutting unit to be lower than other cutting profiles.
In the such scheme, cut the cutting profile that profile is lower than other cutting structures as dise knife, in the drill bit work drilling process, do not wear and tear or wear and tear more after a little while at the bit cutting tooth, the dise knife elder generation that the cutting profile is lower does not participate in brokenly rock work.Along with drill bit works on other cutting teeths when wearing and tearing are arranged, the lower dise knife of cutting profile will participate in brokenly rock, and namely its dise knife in support remedies the cutting energy masterpiece reserve under the bit wear state, makes drill bit that more lasting ability to work be arranged.
As optimal way, described dise knife cutting unit has two at least, wherein has at least the dise knife cutting profile of a dise knife cutting unit to be higher than other cutting profiles.
In the such scheme, cut the cutting profile that profile is higher than other cutting structures as dise knife, in the drill bit work drilling process, do not wear and tear or wear and tear more after a little while at the bit cutting tooth, the dise knife elder generation that the cutting profile is lower participates in breaking rock work.Along with drill bit works on other cutting teeths when wearing and tearing are arranged, parts of other low cutting profiles will participate in brokenly rock, and namely its cutting structure in support remedies the cutting energy masterpiece reserve under the drill bit dise knife state of wear, makes drill bit that more lasting ability to work be arranged.
As optimal way, has the cutting teeth that is furnished with the different-diameter size on the dise knife of a dise knife cutting unit at least.
In the such scheme, cutting teeth diameter difference, the ability on cutting teeth wedging stratum adopt the cutting teeth of different-diameter with difference on the different dise knifes, can widen the ground adaptability of cutting teeth, thereby widen the ground adaptability of drill bit.
As optimal way, has the cutting teeth that is furnished with non-circular profile on the dise knife of a dise knife cutting unit at least.
In the such scheme, the cutting teeth of non-circular (as ellipse) profile can lengthen the height of cutting teeth, also can improve cutting teeth wedging stratum ability, and the highly more long cutting teeth life-span is more high, and differently contoured cutting teeth can be tackled the needs that creep on varying strength stratum.
As optimal way, have at least to be furnished with at least two circle cutting teeths on the dise knife.
In the such scheme, different gear ring covers and scrapes the zone difference of cutting on the same dise knife, and the multi-turn cutting teeth can increase the shaft bottom coverage of dise knife, thereby increases the broken zone of shaft bottom intersection, raising efficiency of breaking rock.
Description of drawings
Fig. 1 is structural representation of the present utility model.
View when Fig. 2 overlooks (contrary drill bit drilling direction is seen) for the utility model structure shown in Figure 1 along drill axis, i.e. vertical view.
Fig. 3 moves the schematic diagram of wheelbase s, stand-off c, offset angle and axial rake β for dise knife of the present utility model geometric position parameter.
Fig. 4 is that the dise knife of a dise knife cutting unit of the present utility model is along the sectional view of dise knife pole axis face.
Fig. 5 is the utility model relative geometry position of dise knife on drill bit and schematic diagram of parameter s, c, α when overlooking along drill axis.
Fig. 6 is the utility model relative geometry position of dise knife on drill bit and schematic diagram of parameter s, c, α when overlooking along drill axis.
Scrape in the shaft bottom when Fig. 7 carries on the back the cutting teeth acting in conjunction for the dise knife cutting teeth of structure drill bit shown in Figure 1 with the palm cut out intersect the scratch schematic diagram.
Fig. 8 is the structural representations of arranging when slapping back of the body cutting teeth for the palm back of the body of the present utility model is furnished with more.
Fig. 9 is provided with stationary cutting structure for the utility model, fixedly cutting teeth footpath structural representation during all standing radially from the bit central to the bit gauge.
Figure 10 is provided with stationary cutting structure for the utility model, the structural representation when fixedly cutting teeth only is arranged on the bit central zone.
Figure 11 for the dise knife cutting teeth of Fig. 9 or structure drill bit shown in Figure 10, fixedly cutting teeth with slap when carrying on the back the cutting teeth acting in conjunction scrape in the shaft bottom cut out intersect the scratch schematic diagram.
Figure 12 is the schematic diagram of dise knife deviation angle of the present utility model when unequal.
Schematic diagram when Figure 13 is lower than other cutting profiles for the dise knife of the utility model one dise knife cutting unit cutting profile.
The schematic diagram of Figure 14 when being furnished with the cutting teeth of two kinds of different-diameter sizes on the utility model dise knife.
The schematic diagram of Figure 15 when being furnished with the cutting teeth of ellipse (non-circular profile) on the utility model dise knife.
The specific embodiment
Below in conjunction with specific embodiments and the drawings the utility model is further described.
Embodiment 1:
Shown in Fig. 1 to 8, among Fig. 1, its dise knife cutting unit is 3, and the palm back of the wheel palm is provided with palm back of the body cutting teeth; Among Fig. 5, the diagram deviation angle be on the occasion of, namely just be offset; Among Fig. 6, the diagram deviation angle is negative value, and namely negative bias moves; A kind of composite drill bit with palm back of the body cutting structure, comprise drill body 1, dise knife 2, has the wheel palm 3 on the described drill body 1, described dise knife 2 is installed on the wheel palm 3 and is rotationally connected with 3 formation of the wheel palm, described dise knife 2 forms with the wheel palm 3 by dise knife axle 4 and is rotationally connected, be furnished with dise knife cutting teeth 21 at described dise knife 2, the scope of the offset angle of described dise knife 2 be 20 °≤| α |≤90 °, be furnished with palm back of the body cutting teeth 311 at the described palm back of the body 31 of taking turns the palm 3, take turns the palm 3 and palm back of the body cutting teeth 311 formation palm back of the body cutting structures, have at least one on the described drill body 1 and carry on the back cutting structure by the described palm 3 of taking turns with the palm that palm back of the body cutting teeth 311 constitutes with at least one by described dise knife 2 and the wheel palm 3 dise knife cutting units that constitute.The scope of the offset angle of dise knife 2 be 20 °≤| α |≤90 °, | α | more big, it is more obvious that dise knife cutting teeth 21 is cut effect scraping of shaft bottom, 20 °≤| α | in the time of≤90 °, cutting teeth is scraped in turn with the form that slowly replaces and is cut brokenly rock in the time of realizing all that drill bit creeps into.As shown in Figure 1, 2, drill bit is provided with 3 dise knife cutting units, be equipped with palm back of the body cutting teeth 311 on the palm back of the body 31 of the wheel palm 3 of 3 dise knife cutting units, dise knife cutting unit and palm back of the body cutting structure cooperate can realize that intersection scrapes the effect of cutting (as shown in Figure 7, cutting teeth on the palm back of the body cutting structure is scraped the Cutting trajectory 6 that cuts out concentric circles at bottom rock, and the cutting teeth on the dise knife is scraped the spirality Cutting trajectory 7 that cuts out from outside to inside at bottom rock.), be conducive to cutting teeth to effective wedging of rock, be conducive to the fragmentation of rock; Palm back of the body cutting structure can obviously improve the guarantor footpath ability of drill bit, increases the real-time cloth tooth density of drill bit, reduces or avoids bottom rock to the wearing and tearing of dise knife body; The stationary cutting structure that the palm back of the body is set up has been saved preciousness on the drill bit and limited space.As shown in Figure 8, be furnished with many row's palm back of the body cutting teeths 311 on the drill bit palm back of the body 31, take full advantage of palm back of the body space and arrange more cutting teeth, to satisfy the design requirement of higher cloth tooth density.
Embodiment 2:
Present embodiment is substantially the same manner as Example 1, and its difference is: also be provided with stationary cutting structure 5 on the drill body 1.
As shown in Figure 9, be provided with the wing formula stationary cutting structure 5 that is independent of palm back of the body cutting structure on the drill body 1, the footpath all is furnished with fixedly cutting teeth 51 to this stationary cutting structure from drill bit heart portion to bit gauge, radially cover full drill bit, when improving the bit gauge protection ability, increase the cloth tooth density of drill bit.
As shown in figure 10, stationary cutting structure 5 is arranged on drill bit heart portion.The broken task in bit central position is less relatively, and it is broken that heart portion adopts the less stationary cutting structure of the number of teeth to be responsible for, and can save cutting teeth quantity.
Figure 11 shows that the dise knife cutting teeth, scrape in the shaft bottom when fixedly cutting teeth is with the acting in conjunction of palm back of the body cutting teeth cut out intersect scratch figure
Embodiment 3:
Present embodiment and embodiment 1 or 2 are basic identical, its difference is: described dise knife cutting unit has two at least, wherein have at least the deviation angle of dise knife of the deviation angle of dise knife of a dise knife cutting unit and other dise knife cutting unit unequal, as Figure 12, α 1 ≠ α 2.
Embodiment 4:
Present embodiment and embodiment 1 or 2 are basic identical, and its difference is: described dise knife cutting unit has two at least, wherein has at least the dise knife cutting profile of a dise knife cutting unit to be lower than other cutting profiles.As shown in figure 13, the dise knife of dise knife cutting unit cutting profile 9 is lower than other cutting profiles 10.Perhaps, described dise knife cutting unit has two at least, wherein has at least the dise knife cutting profile of a dise knife cutting unit to be higher than other cutting profiles.
Embodiment 5:
Present embodiment and embodiment 1 or 2 are basic identical, and its difference is: have the cutting teeth that is furnished with the different-diameter size on the dise knife of a dise knife cutting unit at least, as Figure 14.
Embodiment 6:
Present embodiment and embodiment 1 or 2 are basic identical, and its difference is: have the cutting teeth that is furnished with non-circular profile on the dise knife of a dise knife cutting unit at least.As being furnished with the cutting teeth of ellipse (non-circular) profile on Figure 15 dise knife.
Embodiment 7:
Present embodiment and embodiment 1 or 2 are basic identical, and its difference is: have at least to be furnished with at least two circle cutting teeths on the dise knife, referring to Fig. 1,2,8,10.
What need special declaration is; above embodiment both had been some preferred embodiments of the present utility model; also be various optional enforcement means simultaneously; those skilled in the art as can be known; above-mentioned various optional enforcement means can be carried out various feasible independent assortments; can produce more embodiment thus, it all should be in protection domain of the present utility model, and in order to support the protection of claim.
As, any feasible combination all can constitute new embodiment among the embodiment 3-7.Do not do more limit for example at this, those skilled in the art are other more compound modes as can be known.
All any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. one kind has the composite drill bit that the palm is carried on the back cutting structure, comprise drill body (1), dise knife (2), has the wheel palm (3) on the described drill body (1), described dise knife (2) is installed in the wheel palm (3) and goes up to form with the wheel palm (3) and be rotationally connected, be furnished with dise knife cutting teeth (21) at described dise knife (2), the scope of the offset angle of described dise knife (2) be 20 °≤| α |≤90 °, it is characterized in that: be furnished with palm back of the body cutting teeth (311) at the described palm back of the body (31) of taking turns the palm (3), the wheel palm (3) constitutes palm back of the body cutting structure with palm back of the body cutting teeth (311), has at least one dise knife cutting unit that is made of described dise knife (2) and the wheel palm (3) on the described drill body (1) and at least one carries on the back cutting structure by the described palm (3) of taking turns with the palm that palm back of the body cutting teeth (311) constitutes.
2. the composite drill bit with palm back of the body cutting structure as claimed in claim 1 is characterized in that: also be provided with on described drill body (1) and comprise the fixedly stationary cutting structure (5) of cutting teeth (51).
3. the composite drill bit with palm back of the body cutting structure as claimed in claim 1 or 2, it is characterized in that: described dise knife cutting unit has two at least, wherein has at least the deviation angle of dise knife of the deviation angle of dise knife of a dise knife cutting unit and other dise knife cutting unit unequal.
4. the composite drill bit with palm back of the body cutting structure as claimed in claim 1 or 2, it is characterized in that: described dise knife cutting unit has two at least, wherein has at least the dise knife cutting profile of a dise knife cutting unit to be lower than other cutting profiles.
5. the composite drill bit with palm back of the body cutting structure as claimed in claim 1 or 2, it is characterized in that: described dise knife cutting unit has two at least, wherein has at least the dise knife cutting profile of a dise knife cutting unit to be higher than other cutting profiles.
6. the composite drill bit with palm back of the body cutting structure as claimed in claim 1 or 2 is characterized in that: have the cutting teeth that is furnished with the different-diameter size on the dise knife of a dise knife cutting unit at least.
7. the composite drill bit with palm back of the body cutting structure as claimed in claim 1 or 2 is characterized in that: have the cutting teeth that is furnished with non-circular profile on the dise knife of a dise knife cutting unit at least.
8. the composite drill bit with palm back of the body cutting structure as claimed in claim 1 or 2 is characterized in that: have at least to be furnished with two circle cutting teeths on the dise knife at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200695872U CN203201473U (en) | 2013-02-07 | 2013-02-07 | Composite drill of palm back cutting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200695872U CN203201473U (en) | 2013-02-07 | 2013-02-07 | Composite drill of palm back cutting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203201473U true CN203201473U (en) | 2013-09-18 |
Family
ID=49145589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200695872U Expired - Lifetime CN203201473U (en) | 2013-02-07 | 2013-02-07 | Composite drill of palm back cutting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203201473U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014121748A1 (en) * | 2013-02-07 | 2014-08-14 | Yang Liyuan | Composite drill bit provided with disc-type cutting structure on cutter blade |
| CN105874147A (en) * | 2013-12-05 | 2016-08-17 | 国民油井Dht有限公司 | Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto |
| CN108868622A (en) * | 2017-05-12 | 2018-11-23 | 西南石油大学 | One kind is compound to scrape cut type diamond bit |
-
2013
- 2013-02-07 CN CN2013200695872U patent/CN203201473U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014121748A1 (en) * | 2013-02-07 | 2014-08-14 | Yang Liyuan | Composite drill bit provided with disc-type cutting structure on cutter blade |
| US10352101B2 (en) | 2013-02-07 | 2019-07-16 | Chengdu Weiyi Petroleum Technology Co., Ltd. | Composite drill bit |
| CN105874147A (en) * | 2013-12-05 | 2016-08-17 | 国民油井Dht有限公司 | Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto |
| US10704330B2 (en) | 2013-12-05 | 2020-07-07 | National Oilwell DHT, L.P. | Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto |
| US10988988B2 (en) | 2013-12-05 | 2021-04-27 | National Oilwell DHT, L.P. | Drilling systems and hybrid drill bits for drilling in a subterranean formation and methods relating thereto |
| CN108868622A (en) * | 2017-05-12 | 2018-11-23 | 西南石油大学 | One kind is compound to scrape cut type diamond bit |
| CN108868622B (en) * | 2017-05-12 | 2020-06-05 | 西南石油大学 | Composite scraping type diamond drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210105 Address after: 610500 Room 202, Southwest Petroleum University science and Technology Park, 8 Xindu Avenue, Xindu District, Chengdu, Sichuan Patentee after: CHENGDU WEIYI PETROLEUM TECHNOLOGY Co.,Ltd. Address before: No.18 Fuxue Road, Changping District, Beijing 102249 Patentee before: Yang Liyuan |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |
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| CX01 | Expiry of patent term |