CN106150395A - Boring by percussion drilling tool - Google Patents
Boring by percussion drilling tool Download PDFInfo
- Publication number
- CN106150395A CN106150395A CN201610738344.1A CN201610738344A CN106150395A CN 106150395 A CN106150395 A CN 106150395A CN 201610738344 A CN201610738344 A CN 201610738344A CN 106150395 A CN106150395 A CN 106150395A
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- CN
- China
- Prior art keywords
- blind hole
- thread
- tapped blind
- screw thread
- drilling tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a kind of boring by percussion drilling tool, belong to drill rod；Aim to provide the drill rod of length in a kind of service life.It includes being threaded the diaper body of blind hole, by being located at the drill steel that the external screw thread at leading portion position is connected with described blind hole；Drill steel (2) is multidiameter structure；There is cylindric changeover portion (2 4) front end of external thread section (2 1), and the length of this changeover portion is less than or equal at the screw-thread ending of tapped blind hole (1 2) and the distance of (1 1) at the bottom of hole；It is connected transition by the conical surface shaft shoulder (2 3) between external thread section (2 1) with stage casing (2 2), at the aperture of tapped blind hole (1 2), has the inner conical surface (1 3) suitable with this shaft shoulder；When external thread section (2 1) is tightened with tapped blind hole (1 2) cooperation, the front end face (2 5) of changeover portion (2 4) contacts with (1 1) at the bottom of the hole of tapped blind hole (1 2).The diaper body of drilling tool of the present invention and drill steel not easy fracture, is the improved structure of a kind of drill rod.
Description
Technical field
The present invention relates to a kind of drill rod, particularly relate to a kind of boring by percussion drilling tool.
Background technology
At present, boring by percussion drilling tool is generally formed by connecting by the diaper body of screw thread with bore bit by drill steel.In rock drilling process
In, drill steel, diaper body stressing conditions are more complicated, severe, easily cause drilling tool and lose efficacy, affect the drilling tool life-span.Make discovery from observation,
Drilling tool lost efficacy mainly two kinds of forms: 1) rupture at the female thread ending of diaper body tapped blind hole；2) drill steel external thread section is received
Rupture at tail.By analysis, cause diaper body or drill steel major cause of failure as follows:
1) owing to offering escape at female thread ending, intensity relatively thin corresponding to the diaper body wall of this escape position is relatively
Weak, and stress is usually focused on the intersection of escape and tapped blind hole, therefore diaper body fracture easily occur tapped blind hole with
The intersection of escape.
2) having focused largely at drill steel external screw thread ending due to stress, when by Moment, drill steel is easily at external screw thread
Rupture at ending.
To this end, " US6767156B1 " discloses a kind of threaded drill rod of impact type.The drill steel of this patent has two
Individual tapered guide face (external thread section front end being positioned at drill steel, another be positioned at the intersection of the shaft shoulder and external thread section), trousers
The tapped blind hole of body has two inner conical surfaces corresponding with above-mentioned two tapered guide face, and shaft shoulder right angle end face and diaper body end face
Keep contact, therefore serious cross location (two tapered guide faces and a shaft shoulder right angle end face), at diameter axially existing
Direction there is also location (two tapered guide faces).Although said structure can bear bigger moment of flexure, but bears axially punching
The ability hitting power is more weak.In actual use, even if two matching relationships between inner conical surface and the shaft shoulder process (the most fixed very well
The interference degrees of position is less), but after structure stand under load deforms, (especially near female thread end face) very likely occurs by pricker
Bar shaft shoulder right angle end face (or female thread end face of correspondence) and the conical surface of drill steel external thread section front end bear moment of flexure, thus cause
The carrying arm of force reduces suddenly, moment of flexure local stress increases.Meanwhile, when shaft shoulder face (or female thread end face) discontinuity, its
The impulsive force (for the Main Load of combiner transmission) of transmission can strengthen the degree of stress raisers further, causes part
Lost efficacy in short time.
It addition, " CN10289110B " discloses one " drill bit bored for impact type rock ", this patent is with spiral shell in a section
Stricture of vagina substitutes the escape in tapped blind hole, although can overcome the defect that diaper body wall is relatively thin at escape, but internal thread machining
Relatively difficult.Moreover, owing to eliminating escape, female thread extends at the bottom of the hole of tapped blind hole；Therefore at interior spiral shell
Stress can be formed between at stricture of vagina ending and at the bottom of the hole of tapped blind hole concentrate, thus cause female thread easily to produce with Kong Di intersection
Crackle.Further, owing to the drill steel of this patent is not provided with the shaft shoulder, therefore diaper body end face and threaded engagement line are similar to simply supported beam knot
Structure, necessarily causes external screw thread to rupture at threaded engagement line under Moment, and this is also that current tradition external screw thread is topmost
Failure mode.
Summary of the invention
For drawbacks described above present in prior art, it is desirable to provide a kind of boring by percussion drilling tool, it is not only
The bottom, tapped blind hole hole that can avoid diaper body cracks and can also prevent from rupturing at drill steel external screw thread ending, thus
It is effectively improved the drilling tool life-span.
To achieve these goals, the present invention is by the following technical solutions: it includes the trousers with cylindrical thread blind hole
Body, by being located at the drill steel that the external screw thread at leading portion position is connected with described tapped blind hole；Drill steel is the ladder with stage casing
Axle construction；The front end of external thread section has diameter to be less than the cylindric changeover portion of tapped blind hole, the length of this changeover portion less than or etc.
With the distance at the bottom of hole at the screw-thread ending of tapped blind hole；It is connected transition, spiral shell by the conical surface shaft shoulder between external thread section with stage casing
The inner conical surface suitable with this shaft shoulder is had at the aperture of stricture of vagina blind hole；The changeover portion when external thread section coordinates with tapped blind hole and to tighten
Front end face contacts with at the bottom of the hole of tapped blind hole.
Angle γ between the shaft shoulder and drill steel axis is 1～10 °, preferably 4 °.
The form of thread of tapped blind hole by the bottom of rectilinear female thread crest, curved female thread tooth and one end with
Two sections of linear female thread tooth sides that the tangent other end at the bottom of this female thread tooth is connected with female thread crest are constituted；The spiral shell of external thread section
Stricture of vagina tooth form by the bottom of rectilinear external screw thread tooth, curved external screw thread crest and one end and this tangent other end in external screw thread top
The two sections of linear external screw thread tooth sides being connected with at the bottom of external screw thread tooth are constituted；Wherein, at the bottom of female thread tooth and external screw thread crest is preferred
One section of curve on circular arc, ellipse, parabola or hyperbola, is preferably selected that section of curve corresponding to ellipse short shaft.
Compared with the prior art, due to the fact that and have employed said structure therefore have plurality of advantages, concrete analysis is such as
Under:
1) front end at drill steel external thread section arranges changeover portion, and the drill steel mistake when external thread section coordinates with tapped blind hole and to tighten
The front end face of the section of crossing contacts with at the bottom of the hole of tapped blind hole, and therefore drill steel can be by the hole of the front end face of this changeover portion Yu tapped blind hole
Hitting power is transmitted in end contact, thus the threaded engagement face of tradition drilling tool can be avoided to be subject to the defect destroyed.
2) for relatively conventional drill steel, owing to have employed multidiameter structure and the drill steel stage casing that is relatively large in diameter with diameter relatively
The shaft shoulder that have employed cone structure between little external thread section connects transition, therefore enhances the intensity of drill steel.
3) when external thread section coordinates with tapped blind hole and to tighten, connect at the bottom of the front end face of drill steel changeover portion and the hole of tapped blind hole
Tactile but the conical surface shaft shoulder does not contact with inner conical surface；Therefore axially and radially all without location occurred.Only it is subject to when drill steel
During Moment, the shaft shoulder just contacts with inner conical surface, therefore, it is possible to avoid at drill steel external thread section ending because of by Moment
Fracture.
4) owing to have employed trapezoidal thread and (form of thread is wavelike structure) the answering of combining that be similar to corrugated thread
Closing tooth form, therefore the loading end of screw thread has that trapezoidal thread axial load resistant ability is strong, root of the tooth intensity is good concurrently simultaneously, and waveform spiral shell
The advantages such as stricture of vagina bending resistance square performance is good.It addition, at the bottom of female thread tooth and external screw thread crest all have employed corresponding with ellipse short shaft
Curve (radius of curvature is less), therefore further increases the intensity of internal and external threads.
5) owing to eliminating escape, the diaper body wall thickness of bottom, tapped blind hole hole does not reduce, and therefore diaper body intensity is not
Reduce, will not rupture.
6) inner conical surface is used to coordinate the shaft shoulder and diaper body in impact process can also be overcome easily to stick together scarce with the conical surface shaft shoulder
Fall into.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of tapped blind hole tooth form；
Fig. 3 is the structural representation of drill steel external thread section tooth form.
In figure: 1-1, tapped blind hole 1-2, inner conical surface 1-3, drill steel 2, external thread section 2-1, stage casing 2-2, axle at the bottom of diaper body 1, hole
At the bottom of shoulder 2-3, changeover portion 2-4, front end face 2-5, female thread crest 3, female thread tooth side 4, female thread tooth 5, the external screw thread pressure end 6, outer
Ridge side 7, external screw thread crest 8.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings:
Embodiment 1
As shown in Figures 1 to 3: the diaper body 1 of bore bit is provided with the tapped blind hole 1-2 of cylinder, and drill steel 2 is by being located at its leading portion position
External thread section 2-1 be connected with this tapped blind hole.Drill steel 2 is the multidiameter structure with stage casing 2-2, the external thread section of drill steel 2
The front end of 2-1 has diameter to be less than the cylindric changeover portion 2-4 of tapped blind hole 1-2, and the length of this changeover portion is less than or equal to screw thread
The distance of 1-1 at the bottom of at the screw-thread ending of blind hole 1-2 and hole.In order to avoid stress is concentrated, between external thread section 2-1 and stage casing 2-2
Transition is connected by conical surface shaft shoulder 2-3；Angle γ between shaft shoulder 2-3 and drill steel 2 axis is 1～10 °, preferably 4 °.In order to
Improve the bending strength at drill steel 2 external screw thread ending, at the aperture of tapped blind hole 1-2, have the inner conical surface suitable with shaft shoulder 2-3
1-3.In order to avoid causing interference because crossing location, only has changeover portion when external thread section 2-1 coordinates tighten with tapped blind hole 1-2
The front end face 2-5 of 2-4 contacts with 1-1 at the bottom of the hole of tapped blind hole 1-2, and the male cone (strobilus masculinus) of shaft shoulder 2-3 not with tapped blind hole 1-2 hole
Inner conical surface 1-3 contact at Kou.
Embodiment 2
On the basis of above-described embodiment, the present invention can also use following structure: in order to improve threaded intensity, this
The connection screw thread of bright drilling tool uses and is combined with being similar to corrugated thread (form of thread is wavelike structure) by trapezoidal thread
Compound thread.That is: the form of thread of tapped blind hole 1-2 by the bottom of rectilinear female thread crest 3, curved female thread tooth 5, with
And two sections of linear female thread tooth sides 4 that one end is connected with female thread crest 3 with the tangent other end at the bottom of this female thread tooth are constituted；Phase
Ying Di, the form of thread of external thread section 2-1 is by 6, curved external screw thread crest 8 and one end at the bottom of rectilinear external screw thread tooth
The two sections of linear external screw thread tooth sides 7 being connected with at the bottom of external screw thread tooth 6 with this tangent other end in external screw thread top are constituted.Wherein, interior spiral shell
At the bottom of stricture of vagina tooth 5 and external screw thread crest 8 both can be one section of circular arc, can also be one section of song on oval, parabola or hyperbola
Line.In order to improve the intensity of screw thread further, at the bottom of female thread tooth 5 and external screw thread crest 8 preferably with corresponding to ellipse short shaft
That section of curve.
Claims (6)
1. a boring by percussion drilling tool, including the diaper body with cylindrical thread blind hole, by being located at the outer spiral shell at leading portion position
The drill steel that stricture of vagina is connected with described tapped blind hole；It is characterized in that: drill steel (2) is the multidiameter structure with stage casing (2-2)；
The front end of external thread section (2-1) has diameter to be less than the cylindric changeover portion (2-4) of tapped blind hole (1-2), the length of this changeover portion
The distance of (1-1) at the bottom of at screw-thread ending less than or equal to tapped blind hole (1-2) and hole；External thread section (2-1) and stage casing (2-2)
Between by the conical surface shaft shoulder (2-3) connect transition, have the inner conical surface suitable with this shaft shoulder at the aperture of tapped blind hole (1-2)
(1-3)；The front end face (2-5) of changeover portion (2-4) and screw thread when external thread section (2-1) coordinates with tapped blind hole (1-2) and to tighten
(1-1) contact at the bottom of the hole of blind hole (1-2).
Boring by percussion drilling tool the most according to claim 1, it is characterised in that: between the shaft shoulder (2-3) and drill steel (2) axis
Angle γ be 1～10 °.
Boring by percussion drilling tool the most according to claim 2, it is characterised in that: described angle γ is 4 °.
4. according to the boring by percussion drilling tool described in claim 1 or 2 or 3, it is characterised in that: the screw thread of tapped blind hole (1-2)
Tooth form is by tangent at the bottom of (5) at the bottom of rectilinear female thread crest (3), curved female thread tooth and one end and this female thread tooth
Two sections of linear female thread teeth side (4) that the other end is connected with female thread crest (3) are constituted；The ridge of external thread section (2-1)
Type by (6), curved external screw thread crest (8) and one end at the bottom of rectilinear external screw thread tooth and this external screw thread top tangent another
Two sections of linear external screw thread teeth side (7) that end is connected with (6) at the bottom of external screw thread tooth are constituted.
Boring by percussion drilling tool the most according to claim 4, it is characterised in that: (5) at the bottom of female thread tooth and external screw thread tooth
Top (8) is one section of curve on circular arc, ellipse, parabola or hyperbola.
Boring by percussion drilling tool the most according to claim 5, it is characterised in that: (5) at the bottom of female thread tooth and external screw thread tooth
Top (8) is that section of curve corresponding to ellipse short shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738344.1A CN106150395B (en) | 2016-08-29 | 2016-08-29 | Boring by percussion drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738344.1A CN106150395B (en) | 2016-08-29 | 2016-08-29 | Boring by percussion drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150395A true CN106150395A (en) | 2016-11-23 |
| CN106150395B CN106150395B (en) | 2018-08-17 |
Family
ID=57342406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610738344.1A Active CN106150395B (en) | 2016-08-29 | 2016-08-29 | Boring by percussion drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106150395B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386992A (en) * | 2017-09-01 | 2017-11-24 | 贵州迈锐钻探设备制造有限公司 | Have an opencast mining of drilling tool component and strip mining transformation drilling tool |
| CN108590541A (en) * | 2018-05-04 | 2018-09-28 | 贵州迈锐钻探设备制造有限公司 | Drill bit assembly and driving rock drill |
| WO2021069657A1 (en) * | 2019-10-11 | 2021-04-15 | Sandvik Mining And Construction Tools Ab | Shoulder protected drilling assembly |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767156B1 (en) * | 1999-11-26 | 2004-07-27 | Sandvik Ab | Thread joint and threaded components for percussive drilling components |
| US20060060388A1 (en) * | 2004-08-17 | 2006-03-23 | Sandvik Intellectual Property Ab | Rock drill bit and a thread joint therefor |
| CN101067365A (en) * | 2007-05-30 | 2007-11-07 | 李明锁 | Improved screw connection drill rod |
| CN202348143U (en) * | 2011-12-15 | 2012-07-25 | 山东明珠石油装备制造有限公司 | Novel drill rod joint thread |
| CN103216197A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Fast-rotation type oil drill rod joint thread reinforcing structure |
| CN203114190U (en) * | 2013-03-20 | 2013-08-07 | 湖南有色重型机器有限责任公司 | Rock drilling drill stem |
| CN205918370U (en) * | 2016-08-29 | 2017-02-01 | 贵州捷盛钻具股份有限公司 | Impacted style rock drilling brazing tool |
-
2016
- 2016-08-29 CN CN201610738344.1A patent/CN106150395B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6767156B1 (en) * | 1999-11-26 | 2004-07-27 | Sandvik Ab | Thread joint and threaded components for percussive drilling components |
| US20060060388A1 (en) * | 2004-08-17 | 2006-03-23 | Sandvik Intellectual Property Ab | Rock drill bit and a thread joint therefor |
| CN101067365A (en) * | 2007-05-30 | 2007-11-07 | 李明锁 | Improved screw connection drill rod |
| CN202348143U (en) * | 2011-12-15 | 2012-07-25 | 山东明珠石油装备制造有限公司 | Novel drill rod joint thread |
| CN203114190U (en) * | 2013-03-20 | 2013-08-07 | 湖南有色重型机器有限责任公司 | Rock drilling drill stem |
| CN103216197A (en) * | 2013-04-28 | 2013-07-24 | 江苏曙光石油钻采设备有限公司 | Fast-rotation type oil drill rod joint thread reinforcing structure |
| CN205918370U (en) * | 2016-08-29 | 2017-02-01 | 贵州捷盛钻具股份有限公司 | Impacted style rock drilling brazing tool |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386992A (en) * | 2017-09-01 | 2017-11-24 | 贵州迈锐钻探设备制造有限公司 | Have an opencast mining of drilling tool component and strip mining transformation drilling tool |
| CN107386992B (en) * | 2017-09-01 | 2023-04-25 | 贵州迈锐钻探设备制造有限公司 | Surface mining drill tool assembly and surface mining drill tool |
| CN108590541A (en) * | 2018-05-04 | 2018-09-28 | 贵州迈锐钻探设备制造有限公司 | Drill bit assembly and driving rock drill |
| WO2021069657A1 (en) * | 2019-10-11 | 2021-04-15 | Sandvik Mining And Construction Tools Ab | Shoulder protected drilling assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106150395B (en) | 2018-08-17 |
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