CN108397138A - A kind of drill bit and method for fast drilling in detecting earth stress - Google Patents
A kind of drill bit and method for fast drilling in detecting earth stress Download PDFInfo
- Publication number
- CN108397138A CN108397138A CN201810355767.4A CN201810355767A CN108397138A CN 108397138 A CN108397138 A CN 108397138A CN 201810355767 A CN201810355767 A CN 201810355767A CN 108397138 A CN108397138 A CN 108397138A
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- bit
- outer diameter
- drill
- corer
- taper
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- 238000005553 drilling Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 9
- 239000010432 diamond Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 23
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- E21B10/02—Core bits
-
- 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
- E21B47/00—Survey of boreholes or wells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
This application discloses a kind of drill bits and method for fast drilling in detecting earth stress.Drill bit includes：First corer, one end can removably be connect with big drill, and outer diameter is slightly less than the outer diameter of the big drill；Taper bit, the outer diameter of first end is identical as the outer diameter of big drill, and the taper bit is removably connect with first corer；Second corer, first end are connect with the second end of the taper bit, and outer diameter is slightly less than the outer diameter of the taper bit second end；Coring bit is connect with the second end of second corer, and outer diameter is identical as the outer diameter of taper bit second end；Water passage equipped with the first corer and second corer described in unicom in the taper bit.The drill bit can improve mounting hole construction efficiency and success of the test rate, have higher engineering application value.
Description
Technical field
The present disclosure relates generally to the underground engineerings stress survey technology such as ground, mining fields, and in particular to one kind is for ground
The drill bit and method of fast drilling in stress test.
Background technology
The more deep mountain valleys in west area, tectonic movement is strong, and seismic activity takes place frequently, and crustal stress level is higher.In engineering
In process of construction, crustal stress level directly affects the design and construction scheme of engineering.Therefore, accurate survey engineering place crustal stress
Level is the required content in above-mentioned Process of Engineering Construction.
Currently, hollow inclusion stress relief by borehole overcoring technique is to measure one of most common method of the underground engineering stress of primary rock.It should
Method has main steps that：Brill macropore-polishes installation Tubular Yarn-releasing in big bottom hole-brill bellmouth-brill aperture-aperture and contains
Backpack body core-data processing simultaneously calculates crustal stress.From the above process as can be seen that after macropore is constructed to target location,
Conventional method construction aperture detailed process be：Installation, which polishes drill bit-installation and pushes drilling rod-, polishes big bottom hole-dismounting drilling rod-
Installation taper bit-installation simultaneously pushes drilling rod-construction bellmouth-dismounting drilling rod-installation aperture drill bit-installation and pushes drilling rod-
Construction aperture-dismounting drilling rod.Above process drilling rod need to pass in and out 6 times, and speed of application is very slow.Open file [CN 106121544
A] method detailed process be：Installation taper thread grinding is bit Integrated-and it installs and pushes drilling rod-and polish big bottom hole and bellmouth-of constructing
Dismounting drilling rod-installation aperture drill bit-installation simultaneously pushes drilling rod-construction aperture-dismounting drilling rod.Above process drilling rod need to pass in and out 4 times,
Speed of application is slower.
Invention content
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of for fast drilling in detecting earth stress
Technical solution.
In a first aspect, the embodiment of the present application provides a kind of drill bit for fast drilling in detecting earth stress, including：
First corer, one end can removably be connect with big drill, and outer diameter is slightly less than the big drill
Outer diameter；
Taper bit, the outer diameter of first end is identical as the outer diameter of big drill, the taper bit and described the
One corer removably connects；
Second corer, first end are connect with the second end of the taper bit, and outer diameter is slightly less than the tapered bur
The outer diameter of head second end；
Coring bit is connect with the second end of second corer, and outer diameter is outer with the taper bit second end
Diameter is identical；
Water passage equipped with the first corer and second corer described in unicom in the taper bit.
The outer diameter of second corer is smaller 2-6mm than the outer diameter of the coring bit, can protect aperture core barrel, prevents
Only aperture core barrel and palisades friction, to ensure the placed in the middle of aperture.
The wall thickness of second corer is 6.5-8.0mm, can meet rigidity requirement, and can meet in specification " center
Instrument connection should be coaxial with releasing hole, and holes hole axle tolerance should not exceed the requirement of 2mm ".
The taper surface of the taper bit and the angle of the first corer axis are 30-60 °.
The coring bit uses diamond bit or polycrystalline diamond compact bit.
The conical outer surface of the taper bit is electroplated diamond.
A method of for fast drilling in detecting earth stress, include the following steps：
Macropore is crept into set depth by the drilling machine with big drill；
To be removed set on the big drill of the first coring tube end, and and coring bit will be installed, the coring bit with it is described
Taper bit and the second corer, the outer diameter of the taper bit first end and the big drill are equipped between big drill
Outer diameter is identical, and the outer diameter of the taper bit second end is identical as the outer diameter of the coring bit, outside second corer
Diameter is smaller 2-6mm than the outer diameter of the coring bit；
Aperture drilling is carried out using the drilling machine with the coring bit, drilling depth meets the described of the taper bit
First end is deeper than the set depth of the macropore, and the bellmouth and aperture seamlessly transitted is formed in the end of the macropore.
The taper surface of the taper bit and the angle of the first corer axis are 30-60 °.
The drilling depth meets set depth depth 1-2cm of the first end than the macropore of the taper bit.
After forming the bellmouth and aperture, the aperture is cleaned by water passage, exits drilling rod.
Drill bit and construction method provided by the embodiments of the present application for fast drilling in detecting earth stress, taper therein
It drill bit and is directly connected to by the second corer and coring bit, can once complete the construction of bellmouth and aperture, simplify construction
Process substantially increases the construction efficiency of drilling；The outer diameter of second corer is more smaller than the outer diameter of coring bit, can protect
Two corers prevent the second corer and palisades friction, and can guarantee essentially concentric between the macropore and aperture drilled through, Ke Yiman
Requirement of the sufficient specification to aperture centering effect；The both ends of the taper bit outer diameter phase with the first corer and the second corer respectively
Together, make the no platform of the drilling that construction goes out, between bellmouth and macropore, aperture realize seamlessly transit, it can be ensured that backpack body smoothly into
Enter aperture, to which the success rate of experiment greatly improved.
Description of the drawings
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 is bellmouth and the bit Integrated schematic diagram of aperture in the embodiment of the present application；
The drilling schematic diagram that Fig. 2 the embodiment of the present application is constructed out；
Fig. 3 is the drilling schematic diagram that conventional method is constructed out；
Wherein, 1, taper bit；2, aperture core barrel；3, aperture drill bit；4, macropore core barrel；5, endoporus；7, aperture；8、
Bellmouth；9, guide rod；10, macropore；11, Tubular Yarn；12, big bottom hole platform.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carries out clear, complete description.Obviously, described embodiment is
A part of the invention is instead of all the embodiments.For ease of description, it is illustrated only in attached drawing and invents relevant part.
It should be noted that in the absence of conflict, the embodiment of the present invention for usually describing and showing in this figure
Component can arrange and design with a variety of different configurations.It is understood that specific embodiment described herein is only
It is only used for explaining related invention, rather than the restriction to the invention.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, belong to " setting ",
" connection " should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or integrated connection；Can be
Mechanical connection can also be electrical connection；Can be directly connected to, can also be indirectly connected with by intermediary, can be two
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
In concrete meaning.
As mentioned in the background art, in the prior art hollow inclusion stress relief by borehole overcoring technique have it is cumbersome, time-consuming
The shortcomings of longer.
On the other hand,《Standard for test methods of engineering rock masses》In, there is following requirement：" 2 application set brill releasing drill bits are drilled into pre-
Fixed test depth, and removal of core is answered, it is described.3 applications polish bit grinding flat hole bottom, and apply taper bit typhon
Mouthful.4 application small-bore drill bits bore center instrument connection ... center instrument connection should be coaxial with releasing hole, and holes hole axle tolerance is not
It should be greater than 2mm." according to above-mentioned regulation during practice of construction, due to diameter macropores be more than tapered hole diameter, the meeting of macropore bottom
There are platforms, as shown in Figure 3.In backpack body installation process, when backpack body centering effect is bad or 9 front end of backpack body guide rod is longer
When, guide rod 9, which may touch big bottom hole platform 12, causes colloid to flow out, and eventually leads to test failure.
In view of the drawbacks described above of the prior art, the embodiment of the present application provide a kind of bellmouth for detecting earth stress with
Aperture is bit Integrated, and the drill bit can improve mounting hole construction efficiency and success of the test rate, has higher engineer application valence
Value.As shown in Figure 1, drill bit includes aperture drill bit 3, aperture core barrel 2, taper bit 1.3 outer diameter of aperture drill bit is 38mm, in
Surface is equipped with screw thread, and 2 outer diameter of aperture core barrel is 36mm, and long 40cm, both ends outer surface is equipped with screw thread, 1 both ends of taper bit
Inner surface is equipped with screw thread.Aperture drill bit 3 is connected through a screw thread with aperture core barrel 2；Aperture core barrel 2 passes through with taper bit 1
It is threadedly coupled, taper bit 1 is with macropore core barrel 4 using being threadedly coupled, and wherein the outer diameter of macropore core barrel 4 is 128mm.Cone
Shape drill bit 1 is hollow taper structure, and endoporus 5 is cooling-water duct, and conical outer surface is electroplated diamond, outer surface in drill bit
Heart line is at 30 degree of angles.1 one end outer diameter of taper bit is identical as big drill, is 130mm, other end outer diameter and aperture core
Pipe 2 is identical, is 38mm.The angle 30-60 degree of taper surface and basket axis.Taper bit 1 and aperture drill bit 3 are diamond
Drill bit or composite polycrystal-diamond, aperture drill bit 3 are coring bit.
Using the drill bit in drilling process, flow of cooling water direction is：Drilling rod → macropore core barrel → taper bit →
Aperture core barrel → aperture drill bit → aperture → bellmouth → macropore.
The step of using present invention construction aperture, is as follows：Installation bellmouth and aperture be bit Integrated-and it installs and pushes brill
Bar-construction bellmouth 8 and aperture 7- dismounting drilling rods.Above process drilling rod need to only pass in and out 2 times, and speed of application greatly improves.
Below Specific construction process with the bit Integrated construction detecting earth stress drilling of bellmouth and aperture：
Step 1：Drilling machine is installed and fixed, the trepanning elevation angle takes 20 degree, and measures azimuth.
Step 2：Using the big drill construction macropore 10 of outer diameter 130mm, when macropore 10 is as deep as to target depth 15m,
Drilling rod is exited, and removes big drill.
Step 3：Bellmouth is installed and aperture is bit Integrated, constantly installs and pushes drilling rod to big bottom hole；Then, constantly
Aperture and bellmouth are drilled through forward, when 1 rear end of taper bit reaches the depth positions 15m, are continued the 1-2cm that drills forward, are ensured
Bellmouth is smoothly connected with macropore realization；To once complete the construction of bellmouth and aperture.
Step 4：Reduce drilling rod thrust and drilling rod is moved back into 5-10mm later；Aperture is cleaned with clear water, is then log out drilling rod, is torn open
Except bellmouth is bit Integrated with aperture.
Step 5：After aperture is completely dried, Tubular Yarn 11 is installed.
Step 6：After colloid is fully cured, big drill is installed, aperture and backpack body are released together.
Step 7：The elasticity modulus and Poisson's ratio of core are measured, and calculates crustal stress size and direction.
From above-mentioned steps as can be seen that the present embodiment it is a technical advantage that：
1, compared with prior art, the present embodiment can once complete the construction of bellmouth and aperture, simplify working procedure,
Substantially increase the construction efficiency of drilling.
2, as shown in figure 3, in the drilling constructed out using the prior art, since existing taper bit is by plane and conical surface group
At, it will appear platform 10 in macropore bottom, during Tubular Yarn 11 pushes, when backpack body centering effect is bad, guide rod 9
The platform 10 that macropore bottom may be touched causes colloid to squeeze out and test failure.Compared with prior art pore-forming, the present embodiment is applied
The drilling that work goes out realizes as shown in Fig. 2, the no platform of the drilling constructed out, between bellmouth and macropore, aperture and seamlessly transits, can
Ensure that backpack body can smoothly enter into aperture, to which the success rate of experiment greatly improved.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Other technical solutions of arbitrary combination and formation.Such as features described above and (but not limited to) disclosed herein have it is similar
The technical characteristic of function is replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of drill bit for fast drilling in detecting earth stress, which is characterized in that including：
First corer, one end can removably be connect with big drill, and outer diameter is slightly less than the outer diameter of the big drill；
Taper bit, the outer diameter of first end is identical as the outer diameter of big drill, and the taper bit takes with described first
Core pipe removably connects；
Second corer, first end are connect with the second end of the taper bit, and outer diameter is slightly less than the taper bit
The outer diameter at two ends；
Coring bit is connect with the second end of second corer, the outer diameter phase of outer diameter and the taper bit second end
Together；
Water passage equipped with the first corer and second corer described in unicom in the taper bit.
2. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that：Described second takes
The outer diameter of core pipe is smaller 2-6mm than the outer diameter of the coring bit.
3. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that：Described second takes
The wall thickness of core pipe is 6.5-8.0mm.
4. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that：The tapered bur
The taper surface of head is 30-60 ° with the angle of the first corer axis.
5. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that：The core drill
Head uses diamond bit or polycrystalline diamond compact bit.
6. the drill bit according to claim 1 for fast drilling in detecting earth stress, it is characterised in that：The tapered bur
The conical outer surface of head is electroplated diamond.
7. a kind of method for fast drilling in detecting earth stress, which is characterized in that include the following steps：
Macropore is crept into set depth by the drilling machine with big drill；
It will be removed set on the big drill of the first coring tube end, and coring bit be installed, the coring bit and the macropore
Taper bit and the second corer, the outer diameter of the outer diameter of the taper bit first end and the big drill are equipped between drill bit
Identical, the outer diameter of the taper bit second end is identical as the outer diameter of the coring bit, the outer diameter ratio of second corer
The small 2-6mm of outer diameter of the coring bit；
Aperture drilling is carried out using the drilling machine with the coring bit, drilling depth meets described the first of the taper bit
End is deeper than the set depth of the macropore, and the bellmouth and aperture seamlessly transitted is formed in the end of the macropore.
8. the method according to claim 7 for fast drilling in detecting earth stress, which is characterized in that the tapered bur
The taper surface of head is 30-60 ° with the angle of the first corer axis.
9. the method according to claim 7 for fast drilling in detecting earth stress, which is characterized in that the drilling is deep
Degree meets set depth depth 1-2cm of the first end than the macropore of the taper bit.
10. the method according to claim 7 for fast drilling in detecting earth stress, which is characterized in that described in formation
After bellmouth and aperture, the aperture is cleaned by water passage, exits drilling rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810355767.4A CN108397138A (en) | 2018-04-19 | 2018-04-19 | A kind of drill bit and method for fast drilling in detecting earth stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810355767.4A CN108397138A (en) | 2018-04-19 | 2018-04-19 | A kind of drill bit and method for fast drilling in detecting earth stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108397138A true CN108397138A (en) | 2018-08-14 |
Family
ID=63099192
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810355767.4A Pending CN108397138A (en) | 2018-04-19 | 2018-04-19 | A kind of drill bit and method for fast drilling in detecting earth stress |
Country Status (1)
| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109029796A (en) * | 2018-09-13 | 2018-12-18 | 北京科技大学 | A kind of hydrofracturing detecting earth stress unit protection device |
| CN114718464A (en) * | 2022-03-22 | 2022-07-08 | 中国矿业大学 | Primary hole forming device and method for ground stress test |
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|---|---|---|---|---|
| US3174564A (en) * | 1963-06-10 | 1965-03-23 | Hughes Tool Co | Combination core bit |
| CN102966306A (en) * | 2012-12-03 | 2013-03-13 | 山东大学 | System and operation method for drilling hole on hard rock in one attempt |
| CN202970456U (en) * | 2012-12-03 | 2013-06-05 | 山东大学 | System for boring hard rock for once |
| WO2015010003A1 (en) * | 2013-07-18 | 2015-01-22 | Baker Hughes Incorporated | Coring tools and methods for making coring tools and procuring core samples |
| CN105201494A (en) * | 2015-09-21 | 2015-12-30 | 辽宁工程技术大学 | Method for performing ground stress test by using complete equipment |
| CN105507876A (en) * | 2015-12-14 | 2016-04-20 | 中国科学院武汉岩土力学研究所 | Drilling and measuring integrated device based on stress relief method |
| CN106121544A (en) * | 2016-08-15 | 2016-11-16 | 中国电建集团贵阳勘测设计研究院有限公司 | A awl grinds integral type drill bit for ground stress test |
| CN208686315U (en) * | 2018-04-19 | 2019-04-02 | 中国科学院武汉岩土力学研究所 | A kind of drill bit for fast drilling in detecting earth stress |
-
2018
- 2018-04-19 CN CN201810355767.4A patent/CN108397138A/en active Pending
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|---|---|---|---|---|
| US3174564A (en) * | 1963-06-10 | 1965-03-23 | Hughes Tool Co | Combination core bit |
| CN102966306A (en) * | 2012-12-03 | 2013-03-13 | 山东大学 | System and operation method for drilling hole on hard rock in one attempt |
| CN202970456U (en) * | 2012-12-03 | 2013-06-05 | 山东大学 | System for boring hard rock for once |
| WO2015010003A1 (en) * | 2013-07-18 | 2015-01-22 | Baker Hughes Incorporated | Coring tools and methods for making coring tools and procuring core samples |
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| CN208686315U (en) * | 2018-04-19 | 2019-04-02 | 中国科学院武汉岩土力学研究所 | A kind of drill bit for fast drilling in detecting earth stress |
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| Title |
|---|
| 王强, 口孜东矿深部地应力分布与巷道布置关系研究, pages 15 - 32 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109029796A (en) * | 2018-09-13 | 2018-12-18 | 北京科技大学 | A kind of hydrofracturing detecting earth stress unit protection device |
| CN109029796B (en) * | 2018-09-13 | 2023-11-03 | 北京科技大学 | Protector of hydraulic fracturing ground stress testing device |
| CN114718464A (en) * | 2022-03-22 | 2022-07-08 | 中国矿业大学 | Primary hole forming device and method for ground stress test |
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