CN203499567U - Self-breaking type micro coring drill bit - Google Patents
Self-breaking type micro coring drill bit Download PDFInfo
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- CN203499567U CN203499567U CN201320570897.2U CN201320570897U CN203499567U CN 203499567 U CN203499567 U CN 203499567U CN 201320570897 U CN201320570897 U CN 201320570897U CN 203499567 U CN203499567 U CN 203499567U
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- coring
- rock core
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- drill bit
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Abstract
The utility model discloses a self-breaking type micro coring drill bit including a joint, a base body, cutter wings, and cutting teeth, the joint is connected with the rear end of the base body, the plurality of cutter wings are distributed on the periphery of the front part of the base body, a chip removal channel is formed between every two adjacent cutter wings, the cutting teeth are arranged on the surface of the middle front part of each cutter wing, a coring space for obtaining micro rock cores is arranged in the front of the center of the front end face of the base body, the cutter wings and the cutting teeth are arranged around the coring space, among all of the cutting teeth, the surface of the cutting tooth, which is closest to the coring space, is provided with a cutting edge, and the cutting edge maintains the circularity of a micro rock core and makes the micro rock core break when the micro coring drill bit transversely vibrates. The self-breaking type micro coring drill bit obtains the micro rock core by utilizing the coring space, and maintains the circularity of the micro rock core and makes the micro rock core break by means of the cutting edge, so that the self-breaking type micro coring drill bit is simple in structure, and is free of additionally arranging a breaking structure and a deep chip groove. Therefore, the strength of the drill bit can be guaranteed and the safety of a drilling well can be ensured.
Description
Technical field
The utility model relates to a kind of drill bit, relates in particular to a kind ofly in complicated drilling environment, can improve stock-removing efficiency, and in detecting shaft, possesses the coring bit that declines of autotomying of getting core function.
Background technology
In recent years, each oil field is more and more higher to the requirement of the construction cycle of petroleum gas and safety, match with it various tool in performance, be greatly improved, in drilling process, to PDC(PDC, be the abbreviation of polycrystalline diamond) rate of penetration of drill bit and the requirement of drilling depth also more and more higher.Geological logging need to be identified geological section under landwaste and completed well, but when PDC drill bit creeps in hard formation, landwaste is tiny, and to landwaste, identification brings difficulty.Current, in market, occurred a kind ofly in drilling process, completing micro-coring bit of getting core, the design feature of this drill bit is that drill bit heart portion does not have cutting teeth to participate in cutting, water channel between two wings of drill bit is darker compared with other water channel, at water channel sidewall, one rock core fault structure is set, in drilling process, can form rock core, fracture automatically after rock core contacts with fault structure.This structure has improved the rate of penetration of drill bit, the rock core carrying out by drilling fluid can carry out formation lithology detection, but structure is comparatively complicated, and cored structure and dark chip area need to break,, in the situation that moment of torsion is larger, can there is the risk of the breaking wing in the wing that water channel is darker.Therefore the drilling efficiency and the safety that improve drill bit are very crucial, indispensable.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of coring bit that declines of autotomying of high security.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The coring bit that declines of autotomying described in the utility model comprises joint, matrix, wing and cutting teeth, described joint is connected with the rear end of described matrix, described wing is a plurality of, be distributed on the circumference of described matrix front portion, described cutting teeth is located at the surface of leading portion in described wing, between adjacent described wing, form channel of chip removal, the described matrix of the bottom correspondence of described channel of chip removal is provided with hydrophthalmia; It is characterized in that: the place ahead, center of described matrix front end end face is provided with gets core space for what obtain small rock core, described surrounding of getting core space is described wing and described cutting teeth, in all described cutting teeths, described in the most close, get on the cutting teeth in core space near described in get core space surface be provided with cutting edge, described cutting edge is for maintaining the circularity of described small rock core and make described small rock core fracture when described micro-coring bit oscillation crosswise.
In drill bit drilling process, bit central position reduces total area of cut because getting the existence in core space, and stock-removing efficiency and speed are improved; Meanwhile, along with the carrying out creeping into, drill bit heart portion can form the rock core with certain radius and certain altitude, and the most close cutting edge of getting the cutting teeth in core space can maintain the circularity of rock core; Due to drill bit down-hole movement characteristic and rock mechanics, drill bit can produce the oscillation crosswise vertical with bit matrix axis, and this vibration makes cutting edge produce cutting force to rock core, makes rock core shear failure, and rock core is along with drilling fluid is discharged together.
As preferably, described in get the diameter M in core space span be 3mm≤M≤10mm.Get the concrete diameter in core space and determine according to the required core diameter obtaining, should be not long but get core length, avoid falling into shaft bottom Repeated Cutting.
Particularly, the diameter of getting the described hydrophthalmia of below, core space described in is greater than the diameter of described small rock core.This hydrophthalmia, for discharging the rock core of fracture, both can have been made variable-nozzle and also can make fixed nozzle.
According to actual needs, described micro-coring bit is for creep into PDC matrix drill bits, creep into PDC steel body bit or creep into impregnated bit comprehensively comprehensively comprehensively.
The beneficial effects of the utility model are:
The utility model, by arranging and get core space in bit central position, makes to get core space and does not participate in cutting stratum, and total area of cut reduces, and stock-removing efficiency and speed are improved; The utility model utilization is got core space and is obtained small rock core and utilize cutting edge make rock core maintain circularity and make its fracture, simple in structure, saved drill bit manufacturing cycle and cost, do not need separately to establish fault structure and dark chip area, guarantee the intensity of drill bit, guaranteed drilling safety; The rock core forming can cutting test and drifting test, detects intensity, density, degree of porosity and the specific energy etc. of drilled strata rock, and follow-up drilling well work is had to great importance.
Accompanying drawing explanation
Fig. 1 is the axial sectional view of coring bit of declining of autotomying described in the utility model, only shows half structure of drill bit in figure;
Fig. 2 is the structural representation that cutting edge described in the utility model makes rock core fracture;
Fig. 3 is the top view of coring bit of declining of autotomying described in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As Fig. 1, shown in Fig. 2 and Fig. 3, the coring bit that declines of autotomying described in the utility model comprises joint 1, matrix 8, wing 5 and cutting teeth 4, joint 1 is connected with the rear end (lower end in Fig. 1) of matrix 8, position near joint 1 on matrix 8 is provided with breaker slot 2, wing 5 is 6, by being designed to certain angle, be distributed on the circumference of matrix 8 front portions, the back segment of wing 5 is provided with gauge 3, a plurality of cutting teeths 4 are located at the surface of the middle leading portion of wing 5 by its cloth tooth trace 7, between adjacent wing 5, form channel of chip removal (unmarked in figure), the matrix 8 of the bottom correspondence of channel of chip removal is provided with hydrophthalmia 6, it is a signal that represents its position that the place ahead, center of the front end end face of matrix 8 is provided with for obtaining the core space 10 of getting of getting core space 10(figure of small rock core), the diameter M(that gets core space 10 is the diameter of left and right directions in Fig. 1) span be 3mm≤M≤10mm, the surrounding of getting core space 10 is wing 5 and cutting teeth 4, in all cutting teeths 4, on the most close cutting teeth 4 of getting core space 10, near the surface of getting core space 10, being provided with the most close cutting teeth 4 of getting core space 10 of cutting edge 9(has when a plurality of, if the cutting teeth 4 of cutting edge 9 can be for one or more, this example is 3), cutting edge 9 is for maintaining the circularity of small rock core (not shown) and making small rock core fracture when micro-coring bit oscillation crosswise, so the length of cutting edge 9 and the area in cutting face should meet the requirement that maintains the circularity of small rock core and be easy to make rock core fracture, the diameter of getting the hydrophthalmia 6 of 10 belows, core space is greater than the diameter of small rock core, so that discharge rock core, can make variable-nozzle or fixed nozzle.
According to actual needs, described micro-coring bit is for creep into PDC matrix drill bits, creep into PDC steel body bit or creep into impregnated bit comprehensively comprehensively comprehensively, and bit size can be from 4 " to 26 ".
As shown in Figure 1, Figure 2 and Figure 3, in drill bit drilling process, power tool is delivered to matrix 8 by moment of torsion and the pressure of the drill by joint 1, then is delivered to wing 5 by matrix 8, finally by wing 5, is delivered to cutting teeth 4, and cutting teeth 4 starts to cut stratum.In this process, bit central position reduces total area of cut because getting the existence in core space 10, and stock-removing efficiency and speed are improved; Meanwhile, get the interior meeting in core space 10 and along with creeping into of drill bit, form the rock core (being above-mentioned small rock core) with certain radius and height.Along with the carrying out creeping into, the height of rock core increases thereupon, in drilling process, must be accompanied by the transverse vibration of drill bit, see the oscillation crosswise direction of Fig. 2, this direction is vertical with the axial direction of drill bit, make drill bit depart from center, therefore the most close cutting edge 9 of getting the cutting teeth 4 in core space 10 can produce the cutting force F that cutting force F(is shown in Fig. 1 and Fig. 2 to rock core), make eventually rock core shear failure, the rock core rod of fracture, along with the drilling fluid ejecting from hydrophthalmia 6 is discharged (see figure 3) from getting the chip area of 10 belows, core space together, reaches the object of obtaining small rock core.The small rock core obtaining can carry out cutting test and drifting test, detects intensity, density, degree of porosity and the specific energy etc. of drilled strata rock, and follow-up drilling well work is had to great importance.
Claims (5)
1. the coring bit that declines of autotomying, comprise joint, matrix, wing and cutting teeth, described joint is connected with the rear end of described matrix, described wing is a plurality of, be distributed on the circumference of described matrix front portion, described cutting teeth is located at the surface of leading portion in described wing, between adjacent described wing, forms channel of chip removal, and the described matrix of the bottom correspondence of described channel of chip removal is provided with hydrophthalmia; It is characterized in that: the place ahead, center of described matrix front end end face is provided with gets core space for what obtain small rock core, described surrounding of getting core space is described wing and described cutting teeth, in all described cutting teeths, described in the most close, get on the cutting teeth in core space near described in get core space surface be provided with cutting edge, described cutting edge is for maintaining the circularity of described small rock core and make described small rock core fracture when described micro-coring bit oscillation crosswise.
2. the coring bit that declines of autotomying according to claim 1, is characterized in that: described in get the diameter M in core space span be 3mm≤M≤10mm.
3. the coring bit that declines of autotomying according to claim 1 and 2, is characterized in that: described in get the described hydrophthalmia of below, core space diameter be greater than the diameter of described small rock core.
4. the coring bit that declines of autotomying according to claim 3, is characterized in that: described micro-coring bit is for creep into PDC matrix drill bits, creep into PDC steel body bit or creep into impregnated bit comprehensively comprehensively comprehensively.
5. the coring bit that declines of autotomying according to claim 1 and 2, is characterized in that: described micro-coring bit is for creep into PDC matrix drill bits, creep into PDC steel body bit or creep into impregnated bit comprehensively comprehensively comprehensively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570897.2U CN203499567U (en) | 2013-09-16 | 2013-09-16 | Self-breaking type micro coring drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570897.2U CN203499567U (en) | 2013-09-16 | 2013-09-16 | Self-breaking type micro coring drill bit |
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| Publication Number | Publication Date |
|---|---|
| CN203499567U true CN203499567U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320570897.2U Expired - Lifetime CN203499567U (en) | 2013-09-16 | 2013-09-16 | Self-breaking type micro coring drill bit |
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| Country | Link |
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| CN (1) | CN203499567U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257218A (en) * | 2015-11-02 | 2016-01-20 | 西南石油大学 | Self-propelling drill bit |
| CN113982491A (en) * | 2020-07-26 | 2022-01-28 | 中石化石油工程技术服务有限公司 | Micro-core PDC drill bit with bevel gear structure |
| CN115637931A (en) * | 2022-09-08 | 2023-01-24 | 中国石油化工股份有限公司勘探分公司 | Composite drilling bit and coring while drilling method |
| CN116104421A (en) * | 2023-04-04 | 2023-05-12 | 成都迪普金刚石钻头有限责任公司 | PDC mixed-inlaid drill bit suitable for coring of hard broken stratum |
-
2013
- 2013-09-16 CN CN201320570897.2U patent/CN203499567U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257218A (en) * | 2015-11-02 | 2016-01-20 | 西南石油大学 | Self-propelling drill bit |
| CN113982491A (en) * | 2020-07-26 | 2022-01-28 | 中石化石油工程技术服务有限公司 | Micro-core PDC drill bit with bevel gear structure |
| CN115637931A (en) * | 2022-09-08 | 2023-01-24 | 中国石油化工股份有限公司勘探分公司 | Composite drilling bit and coring while drilling method |
| CN116104421A (en) * | 2023-04-04 | 2023-05-12 | 成都迪普金刚石钻头有限责任公司 | PDC mixed-inlaid drill bit suitable for coring of hard broken stratum |
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Granted publication date: 20140326 |
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| CX01 | Expiry of patent term |