CN202990861U - Hybrid drill bit with strengthened core cutting function - Google Patents
Hybrid drill bit with strengthened core cutting function Download PDFInfo
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- CN202990861U CN202990861U CN 201220703526 CN201220703526U CN202990861U CN 202990861 U CN202990861 U CN 202990861U CN 201220703526 CN201220703526 CN 201220703526 CN 201220703526 U CN201220703526 U CN 201220703526U CN 202990861 U CN202990861 U CN 202990861U
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Abstract
The utility model relates to a hybrid drill bit, applicable to petroleum, natural gas and geography drills, with a strengthened core cutting function. The hybrid drill bit comprises a body, blades and sprayers are disposed on the body, and the contour of each blade is divided into a core, an inner cone, a nose, a shoulder and a gauge protecting section from inside to outside. Fixed cutting teeth are mounted at the inner cone, the nose, the shoulder and the gauge protecting section of the contour of each blade, a cone leg is disposed between each two blades, the upper end of each cone leg is integrated with the body, the lower end of each cone leg is provided with a cone, each cone is provided with cone cutting teeth, and the hybrid drill bit is characterized in that the core of the lower end of the body is provided with a movable cutting tooth. The hybrid drill bit has the advantages that the hybrid drill bit is high in comprehensive performance, effective pre-crushing can be performed to rock at the pit bottom, the fixed cutting teeth of the drill bit can be fed into the rock, impact on the fixed cutting teeth can be reduced, and cutting efficiency and mechanical drilling speed of the drill bit core are increased so as to increase overall cutting efficiency and mechanical drilling speed of the drill bit.
Description
Technical field
The utility model relates to a kind of Mixed drilling bit of the reinforcement heart section cutting function of using for oil, natural gas and geological drilling, and this drill bit is applicable to the drilling well on hard formation and interlayer stratum.
Background technology
In the prior art, when drilling well runs into hard formation, PDC diamond bit commonly used is mainly to realize that by the scraping motion mode down-hole creeps into, fixedly cutting teeth main on the nose of diamond bit and shoulder is difficult to effective wedging bottom rock, and it is very slow that the rate of penetration of diamond bit will become; And rock bit easily makes rock produce darker crushing teeth hole to impact crushing mode fractured rock, but because the stratum is hard, can not make rock produce volumetric fracture, therefore the stock-removing efficiency of rock bit cutting teeth is also very low.in addition on the one hand, when drill bit runs into the more stratum of some soft or hard interlayers, the fixedly cutting teeth of PDC diamond bit very easily is subject to impacting damaged, in order to tackle this situation, Chinese patent literature CN200880016630.0 discloses the Mixed drilling bit that is combined by rock bit and PDC diamond bit, though this Mixed drilling bit has stronger combination property, but there is following deficiency: due to the rock breaking mechanism of the peculiar impact crushing of tricone bit, the shock loading that the gear wheel rotation produces easily causes the fixedly cutting teeth composite sheet of drill bit broken, thereby cause the reduction of drill bit rate of penetration, and on this drill bit, the most close drill bit axial centre is fixing cutting teeth, due to this fixing too close drill bit axial centre of cutting teeth, the radius of gyration is little, cutting speed is low, thereby stock-removing efficiency is low, and fixedly cutting teeth speed is cut separately shaft bottom axial centre rock, and the load of bearing is larger, is prone to the composite bed fragmentation or comes off.
Summary of the invention
Technical problem to be solved in the utility model is the deficiency that exists for above-mentioned prior art and a kind of Mixed drilling bit of strengthening heart section cutting function is provided, not only combination property is strong for it, can carry out precracking effectively to bottom rock, make the effective wedging rock of fixedly cutting teeth of drill bit, and can reduce the fixedly impact of cutting teeth, strengthen stock-removing efficiency and the rate of penetration of drill bit heart section, thereby improve stock-removing efficiency and the rate of penetration of drill bit.
The utility model is that the technical scheme that the problem of the above-mentioned proposition of solution adopts is: include bit body, wing and nozzle are set on bit body, the wing profile is divided into heart section, inner cone, nose, shoulder and gauge section from the inside to the outside; Inner cone, nose, shoulder and gauge section at wing upper slitter wing contour are installed on fixedly cutting teeth, bit leg is arranged between wing, described bit leg upper end and bit body are connected into one, gear wheel is installed in the lower end of bit leg, be installed on the gear wheel cutting teeth on gear wheel, its difference is to be provided with movable cutting teeth in described bit body lower end heart section.
Press such scheme, the outermost profile of described gear wheel cutting teeth covers line and covers outside line at the outermost profile of described fixedly cutting teeth, the outermost profile of described gear wheel cutting teeth cover line and fixedly the distance that covers between line of the outermost profile of cutting teeth be 0.3 ~ 5 millimeter.
Press such scheme, described wing is 2 ~ 4; Described gear wheel is 2 ~ 4.
Press such scheme, described movable cutting teeth comprises axial blind hole and the movable cutting teeth of installing in axial blind hole, and the axis of movable cutting teeth departs from mutually with the bit body axis, and departing from distance is 0.5 ~ 40 millimeter.
Press such scheme, described movable cutting teeth is the circular shaft shape, leading section is provided with petal cutting teeth, axial region is stairstepping, anterior diameter is less, the stairstepping axial blind hole phase configuration of movable cutting teeth and the setting of drill bit body-centered section is installed on axial baffle ring in axial blind hole, baffle ring connects firmly mutually with bit body.
Press such scheme, described movable cutting teeth diameter is 5 ~ 40 millimeters, and the petal cutting teeth of described leading section is along circumferentially being provided with 2 ~ 5 cutting edges.
Press such scheme, described gear wheel is insert cone, and described movable cutting teeth is made by carbide alloy or polycrystalline diamond, or is composited by carbide alloy and polycrystalline diamond.
Press such scheme, described fixedly cutting teeth is diamond compact.
Press such scheme, the rotation of described gear wheel becomes the angle of 30 ° ~ 70 ° with the rotation of bit body.
The beneficial effects of the utility model are: 1, the impact of rock bit is pressed into the scraping campaign of diamond bit and organically combines mutually, realize the shaft bottom precracking, guarantee the fixedly effective wedging rock of cutting teeth, eliminate drill bit at some special formation generation stick-slip phenomenons, reduce the fixedly shock loading of cutting teeth, reduce the fixedly damaged probability of cutting teeth impact, improve bit cutting efficient and rate of penetration; 2, the movable cutting teeth installed of drill bit body-centered section, due to respect to the bit body axis bias, thereby the movement velocity of the relative bottom rock of movable cutting teeth is larger, the cutting speed that is movable cutting teeth is larger, and the multi-tool edge of movable cutting teeth cuts simultaneously, has strengthened stock-removing efficiency and the rate of penetration of drill bit heart section; 3, because covering line, the outermost profile of gear wheel cutting teeth covers outside line at the outermost profile of described fixedly cutting teeth, the shock loading that drill bit produces is in the course of the work mainly born by the gear wheel cutting teeth, further reduced the shock loading of PDC composite sheet, reduce the PDC composite sheet and impacted damaged probability, thereby improved whole stock-removing efficiency and the rate of penetration of drill bit.
Description of drawings
Fig. 1 is the stereogram of embodiment of the utility model when standing upside down.
Fig. 2 is the top view of embodiment of the utility model when standing upside down.
Fig. 3 be gear wheel cutting teeth of the present utility model and fixedly the outermost profile of cutting teeth cover the perspective view of line.
Fig. 4 is the A-A sectional view of Fig. 2.
Fig. 5 is the partial enlarged drawing of the movable cutting teeth region in Fig. 4.
Fig. 6 is the stereogram of movable cutting teeth.
Fig. 7 is the stereogram of baffle ring.
Fig. 8 is for when bit, has the cutting speed distribution map of the fixedly cutting teeth of Mixed drilling bit or PDC drill bit heart section now.
Fig. 9 is the cutting speed distribution map of movable cutting teeth time rotational.
Figure 10 is the cutting speed distribution map after the speed in Fig. 8 and Fig. 9 is synthesized.
The specific embodiment
Further illustrate embodiment of the present utility model below in conjunction with accompanying drawing.
Include bit body 1, on bit body, along 3 wings 2 and nozzle 7 circumferentially are set, the profile 17 of wing is divided into heart section 21, inner cone 22, nose 23, shoulder 24 and gauge section 25 from the inside to the outside; On wing, the inner cone 22 of profile, nose 23, shoulder 24 and gauge section 25 are installed on respectively fixedly cutting teeth 3, and fixedly cutting teeth 3 is diamond compact; Be provided with bit leg 4 on bit body between each wing, described bit leg upper end and bit body 1 are integrally welded, the lower end of bit leg arranges axle journal, and gear wheel 5 is sleeved on axle journal and by steel ball and axially locks, and the rotation of gear wheel 9 and the rotation 8 of bit body be at 45 ° ~ the angle α of 60 °.Be installed on gear wheel cutting teeth 6 on gear wheel, the gear wheel cutting teeth on described gear wheel is positioned at 24 of the nose 23 of wing profile and shoulders.Heart section 21 at the wing profile, that is the lower end heart section of bit body is provided with an axial blind hole, be installed on a movable cutting teeth 10 in axial blind hole and by axial baffle ring 13 axial location, axial blind hole axis that is movable cutting teeth axis 11 depart from respect to bit body axis 8, and departing from distance is 5 ~ 25 millimeters; Described movable cutting teeth is the circular shaft shape, diameter is 10 ~ 30 millimeters, leading section is provided with petal cutting teeth, cutting teeth is along circumferentially being provided with 3 cutting edges 12, and axial region is stairstepping, and anterior diameter is less, movable cutting teeth and stairstepping axial blind hole phase configuration, be installed on axial baffle ring in axial blind hole, baffle ring connects firmly mutually with bit body, and described movable cutting teeth is composited by carbide alloy and polycrystalline diamond.Described axial blind hole is shoulder hole, and axially baffle ring 13 is installed in the shoulder hole of lower end, and movable cutting teeth 10 can rotate in axial blind hole.The outermost profile of described gear wheel cutting teeth covers line 19 and covers outside line 18 at the outermost profile of described fixedly cutting teeth, the outermost profile of gear wheel cutting teeth cover line and fixedly the distance C that covers between line of the outermost profile of cutting teeth be 0.5 ~ 1 millimeter.
When bit body during around 8 rotation of self axis, the cutting speed distribution map of the fixedly cutting teeth of existing Mixed drilling bit or PDC drill bit heart section as shown in Figure 8, this moment Mixed drilling bit or PDC drill bit heart section fixedly cutting teeth on part cutting speed near bit body axis 8 very low; Movable cutting teeth is around self axis 11 time rotational, and the cutting speed distribution map of movable cutting teeth as shown in Figure 9; When movable cutting teeth both with drill bit revolution, again around self axis 11 time rotational, synthetic cutting speed distribution map as shown in figure 10, the part cutting speed near bit body axis 8 on this moment movable cutting teeth has a more substantial increase.
During the utility model work, the scraping campaign that the impact of rock bit is pressed into diamond bit combines, the gear wheel cutting teeth is realized the shaft bottom precracking, guarantee the fixedly effective wedging rock of cutting teeth, eliminate drill bit at some special formation generation stick-slip phenomenons, reduce the fixedly shock loading of cutting teeth, reduce the fixedly damaged probability of cutting teeth impact, improve bit cutting efficient and rate of penetration; The movable cutting teeth 10 that install in the centre of bit body, due to respect to the bit body axis bias, thereby the movement velocity of the relative bottom rock of movable cutting teeth is larger, be that movable cutting teeth cutting speed is larger, and the multi-tool edge of movable cutting teeth cuts simultaneously, further improves stock-removing efficiency and the rate of penetration of drill bit heart section.
Claims (9)
1. a Mixed drilling bit of strengthening heart section cutting function, include bit body, and wing and nozzle are set on bit body, and the wing profile is divided into heart section, inner cone, nose, shoulder and gauge section from the inside to the outside; Inner cone, nose, shoulder and gauge section at wing upper slitter wing contour are installed on fixedly cutting teeth, bit leg is arranged between wing, described bit leg upper end and bit body are connected into one, gear wheel is installed in the lower end of bit leg, be installed on the gear wheel cutting teeth on gear wheel, it is characterized in that being provided with movable cutting teeth in described bit body lower end heart section.
2. by the Mixed drilling bit of the reinforcement heart claimed in claim 1 section cutting function, the outermost profile that it is characterized in that described gear wheel cutting teeth covers line and covers outside line at the outermost profile of described fixedly cutting teeth, the outermost profile of described gear wheel cutting teeth cover line and fixedly the distance that covers between line of the outermost profile of cutting teeth be 0.3 ~ 5 millimeter.
3. by the Mixed drilling bit of the described reinforcement heart of claim 1 or 2 section cutting function, it is characterized in that described wing is 2 ~ 4.
4. by the Mixed drilling bit of the reinforcement heart claimed in claim 3 section cutting function, it is characterized in that described gear wheel is 2 ~ 4.
5. by the Mixed drilling bit of the described reinforcement heart of claim 1 or 2 section cutting function, it is characterized in that described movable cutting teeth comprises axial blind hole and the movable cutting teeth of installing in axial blind hole, the axis of movable cutting teeth departs from mutually with the bit body axis, and departing from distance is 0.5 ~ 40 millimeter.
6. by the Mixed drilling bit of the reinforcement heart claimed in claim 5 section cutting function, it is characterized in that described movable cutting teeth is the circular shaft shape, leading section is provided with petal cutting teeth, axial region is stairstepping, anterior diameter is less, the stairstepping axial blind hole phase configuration of movable cutting teeth and the setting of drill bit body-centered section is installed on axial baffle ring in axial blind hole, baffle ring connects firmly mutually with bit body.
7. by the Mixed drilling bit of the reinforcement heart claimed in claim 6 section cutting function, it is characterized in that described movable cutting teeth diameter is 5 ~ 40 millimeters, the petal cutting teeth of described leading section is along circumferentially being provided with 2 ~ 5 cutting edges.
8. by the Mixed drilling bit of the described reinforcement heart of claim 6 or 7 section cutting function, it is characterized in that described gear wheel is insert cone, described movable cutting teeth is made by carbide alloy or polycrystalline diamond, or is composited by carbide alloy and polycrystalline diamond.
9. by the Mixed drilling bit of the described reinforcement heart of claim 1 or 2 section cutting function, it is characterized in that the rotation of described gear wheel becomes 30 ° ~ 70 ° angles with the rotation of bit body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220703526 CN202990861U (en) | 2012-12-19 | 2012-12-19 | Hybrid drill bit with strengthened core cutting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220703526 CN202990861U (en) | 2012-12-19 | 2012-12-19 | Hybrid drill bit with strengthened core cutting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202990861U true CN202990861U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220703526 Expired - Fee Related CN202990861U (en) | 2012-12-19 | 2012-12-19 | Hybrid drill bit with strengthened core cutting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202990861U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015899A (en) * | 2012-12-19 | 2013-04-03 | 江汉石油钻头股份有限公司 | Mixed drilling bit with enhanced core part cutting function |
| CN109898998A (en) * | 2019-03-03 | 2019-06-18 | 兰州城市学院 | A kind of spiral wing additional mechanical supercharging returns the secondary broken rock drill bit of row |
| CN111502551A (en) * | 2020-04-20 | 2020-08-07 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
| CN112282655A (en) * | 2020-11-30 | 2021-01-29 | 湖南屈原水利建筑工程有限公司 | PDC (polycrystalline diamond compact) diamond bit for breaking rock |
| CN113389496A (en) * | 2021-06-16 | 2021-09-14 | 中石化江钻石油机械有限公司 | Long-life hybrid drill bit |
-
2012
- 2012-12-19 CN CN 201220703526 patent/CN202990861U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015899A (en) * | 2012-12-19 | 2013-04-03 | 江汉石油钻头股份有限公司 | Mixed drilling bit with enhanced core part cutting function |
| CN109898998A (en) * | 2019-03-03 | 2019-06-18 | 兰州城市学院 | A kind of spiral wing additional mechanical supercharging returns the secondary broken rock drill bit of row |
| CN111502551A (en) * | 2020-04-20 | 2020-08-07 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
| CN111502551B (en) * | 2020-04-20 | 2021-07-30 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
| CN112282655A (en) * | 2020-11-30 | 2021-01-29 | 湖南屈原水利建筑工程有限公司 | PDC (polycrystalline diamond compact) diamond bit for breaking rock |
| CN113389496A (en) * | 2021-06-16 | 2021-09-14 | 中石化江钻石油机械有限公司 | Long-life hybrid drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuhan Rui Te diamond Co., Ltd Assignor: Jianghan Petroleum Drilling Bit Co., Ltd. Contract record no.: 2014420000097 Denomination of utility model: Mixed drilling bit with enhanced core part cutting function Granted publication date: 20130612 License type: Exclusive License Record date: 20140610 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| 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: 20130612 Termination date: 20161219 |