CN106089116A - Impact type compound thread connects drill rod - Google Patents
Impact type compound thread connects drill rod Download PDFInfo
- Publication number
- CN106089116A CN106089116A CN201610738737.2A CN201610738737A CN106089116A CN 106089116 A CN106089116 A CN 106089116A CN 201610738737 A CN201610738737 A CN 201610738737A CN 106089116 A CN106089116 A CN 106089116A
- Authority
- CN
- China
- Prior art keywords
- thread
- blind hole
- tapped blind
- external screw
- screw thread
- 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.)
- Granted
Links
- 150000001875 compounds Chemical class 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 238000009527 percussion Methods 0.000 claims abstract description 6
- 230000009021 linear effect Effects 0.000 claims description 6
- 208000031481 Pathologic Constriction Diseases 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- 210000001215 vagina Anatomy 0.000 claims description 5
- 238000000034 method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000005516 engineering process 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
- 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
Landscapes
- 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)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of impact type compound thread and connect drill rod, belong to boring by percussion drilling tool；Aim to provide a kind of diaper body and the boring by percussion drilling tool of drill steel length in service life.It includes diaper body, the drill steel being connected by external screw thread with tapering blind hole；When external thread section (2 1) is tightened with tapped blind hole (1 2), 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 form of thread of tapped blind hole (1 2) is made up of (5) at the bottom of rectilinear female thread crest (3), curved female thread tooth and two sections of rectilinear female thread tooth sides (4), and the form of thread of external thread section (2 1) is made up of the rectilinear external screw thread tooth side (7) of (6), curved external screw thread crest (8) and two sections at the bottom of rectilinear external screw thread tooth.The diaper body of drilling tool of the present invention and drill steel not easy fracture, handling ease, service life are long；It it is the improved structure of a kind of boring by percussion drilling tool.
Description
Technical field
The present invention relates to a kind of boring by percussion drilling tool, particularly relate to a kind of impact type compound thread and connect drill rod.
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.It has been observed that drilling tool
Lost efficacy and mainly had two kinds of forms: 1) rupture near drill steel external thread section ending；2) receive from the female thread of diaper body tapped blind hole
It is susceptible to fracture to the region between at the bottom of screw hole at tail.By analysis, drill steel or diaper body major cause of failure are caused such as
Under:
1) have focused largely at drill steel external screw thread ending due to stress, attached at the external screw thread ending of drill steel when by Moment
Closely it is susceptible to fracture.
2) owing to offering escape at female thread ending, the diaper body wall corresponding to this escape position is relatively thin, strong
Spending more weak, and stress is usually focused on the intersection of escape and tapped blind hole, therefore diaper body fracture easily occurs blind at screw thread
Near the intersection of hole and escape.
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 the right angle end face of the shaft shoulder and diaper body end
Face keeps contact, therefore serious crosses location (two tapered guide faces and a shaft shoulder right angle end face), directly axially existing
Direction, footpath there is also location (two tapered guide faces).Although said structure can bear bigger moment of flexure, but bears axially
The ability of impulsive force is more weak.In actual use, even if two matching relationships between inner conical surface and the shaft shoulder process to obtain (mistake very well
Location interference degrees less), but when drilling tool stand under load deformation after (especially near female thread end face) very likely occur by
Drill steel 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 lead
The cause carrying arm of force reduces suddenly, moment of flexure local stress increases.Meanwhile, when shaft shoulder right angle end face (or female thread end face) unbalance stress
Time even, the impulsive force (for the Main Load of combiner transmission) of its transmission can strengthen the degree of stress raisers further,
Lost efficacy in causing the part 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 impact type compound thread connects rock drilling
Drilling tool, it not only can be avoided the bottom, tapped blind hole hole of diaper body to crack but also can also prevent from sending out at drill steel external screw thread ending
Raw fracture, 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 being threaded the diaper body of blind hole, passing through
It is located at the drill steel that the external screw thread at leading portion position is connected with described tapped blind hole；
The bottom outlet of tapped blind hole is taper hole, and the angle β between the bus of this bottom outlet and this bottom outlet axis is 1～10 °, is preferably
5°；
The front end of external thread section has diameter to be less than the cylindric changeover portion of tapped blind hole smallest cross-sectional diameter, the length of this changeover portion
Less than or equal to the distance at the bottom of at the screw-thread ending of tapped blind hole and hole；The transition when external thread section coordinates with tapped blind hole and to tighten
The front end face of section contacts with at the bottom of the hole of tapped blind hole；
The form of thread of tapped blind hole is by the bottom of rectilinear female thread crest, curved female thread tooth and one end is interior with this
Two sections of linear female thread tooth sides that the tangent other end of Bottom of Thread is connected with female thread crest are constituted, the ridge of external thread section
Type by the bottom of rectilinear external screw thread tooth, curved external screw thread crest and one end and this tangent other end of external screw thread crest with
The two sections of linear external screw thread tooth sides connected at the bottom of external screw thread tooth are constituted.
At the bottom of female thread tooth in technique scheme and the preferred circular arc of external screw thread crest, ellipse, parabola or hyperbola
On one section of curve, be preferably selected that section of curve corresponding to ellipse short shaft.
Drill steel in technique scheme uses the multidiameter structure with stage casing；In order to avoid stress is concentrated, external screw thread
Section is connected transition with between stage casing by the conical surface shaft shoulder；In order to improve the bending strength of drill steel, have at the aperture of tapped blind hole with
The inner conical surface that this shaft shoulder is suitable, the angle γ between the shaft shoulder and drill steel axis is 1～10 °, preferably 4 °.
In technique scheme, at the bottom of tapped blind hole and hole between have escape.
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) 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 root.
3) 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.
4) 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 conical surface shaft shoulder just contacts (playing unbending), therefore, it is possible to avoid drill steel external thread section to finish up with inner conical surface
Place is because being ruptured by Moment.
5) due to the diaper body wall thickness that have employed the tapped blind hole with tapering, increase bottom, tapped blind hole hole, therefore move back
Diaper body intensity at cutter groove does not weaken, and 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 at the bottom of diaper body 1, hole, tapped blind hole 1-2, inner conical surface 1-3, escape 1-4, drill steel 2, external thread section 2-1,
At the bottom of stage casing 2-2, shaft 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, outer spiral shell
Stricture of vagina the pressure end 6, external screw thread tooth 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 taper thread blind hole 1-2, drill steel 2 is by being located at outside its leading portion position
Thread segment 2-1 is connected with this tapped blind hole；Angle β between bus and this bottom outlet axis of the tapering bottom outlet of this tapped blind hole is
1～10 °, preferably 5 °.
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 smallest cross-sectional diameter,
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；As external thread section 2-1
Coordinate when tightening with tapped blind hole 1-2, 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.
In order to improve threaded intensity, connect screw thread use by trapezoidal thread be similar to corrugated thread (ridge
Type is wavelike structure) compound thread that combines.That is: the form of thread of tapped blind hole 1-2 is by rectilinear female thread crest
3, at the bottom of curved female thread tooth 5 and be connected with female thread crest 3 with the tangent other end at the bottom of this female thread tooth two sections of one end
Linear female thread tooth side 4 is constituted；Correspondingly, the form of thread of external thread section 2-1 by the bottom of rectilinear external screw thread tooth 6, curve
Two sections of linears that the external screw thread crest 8 of shape and one end are connected with at the bottom of external screw thread tooth 6 with this tangent other end of external screw thread crest
External screw thread tooth side 7 is constituted.For the ease of processing, at the bottom of female thread tooth 5 and external screw thread crest 8 both can be one section of circular arc, also might be used
To be one section of curve on oval, parabola or hyperbola.In order to improve the intensity of screw thread further, at the bottom of female thread tooth 5 and
External screw thread crest 8 is preferably with that corresponding to ellipse short shaft section curve.
Embodiment 2
On the basis of above-described embodiment, the present invention can also use following structure: in order to improve the intensity of drill steel 2, drill steel 2 is adopted
By the multidiameter structure with stage casing 2-2；Concentrate in order to avoid producing stress, by cone between external thread section 2-1 and stage casing 2-2
Over glaze shoulder 2-3 connects transition；Angle γ between shaft shoulder 2-3 and drill steel 2 axis is 1～10 °, preferably 4 °.In order to improve pricker
Bending strength at bar 2 external screw thread ending, has the inner conical surface 1-3 suitable with shaft shoulder 2-3 at the aperture of tapped blind hole 1-2.When
External thread section 2-1 and tapped blind hole 1-2 coordinates when tightening, the hole of the front end face 2-5 and tapped blind hole 1-2 of only changeover portion 2-4
End 1-1 contacts and the male cone (strobilus masculinus) of shaft shoulder 2-3 does not contact with the inner conical surface 1-3 at tapped blind hole 1-2 aperture；Therefore can avoid
Cross location and form interference.
Embodiment 3
On the basis of above-described embodiment, the present invention can also use following structure: for the ease of machining internal thread, blind at screw thread
Escape 1-4 it is provided with between 1-1 at the bottom of hole 1-2 and hole.
Claims (9)
1. impact type compound thread connects a drill rod, including being threaded the diaper body of blind hole, by being located at leading portion position
The drill steel that is connected with described tapped blind hole of external screw thread；It is characterized in that:
The bottom outlet of tapped blind hole (1-2) is taper hole, and the angle β between the bus of this bottom outlet and this bottom outlet axis is 1～10 °；
The front end of external thread section (2-1) has diameter to be less than the cylindric changeover portion (2-of tapped blind hole (1-2) smallest cross-sectional diameter
4), 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；When outer spiral shell
Stricture of vagina section (2-1) coordinates the front end face (2-5) of changeover portion (2-4) and the hole of tapped blind hole (1-2) when tightening with tapped blind hole (1-2)
The end (1-1), contacts；
The form of thread of tapped blind hole (1-2) by (5) at the bottom of rectilinear female thread crest (3), curved female thread tooth and
Two sections of linear female thread teeth side (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,
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
Two sections of linear external screw thread teeth side (7) being connected with (6) at the bottom of external screw thread tooth with this tangent other end of external screw thread crest are constituted.
Impact type compound thread the most according to claim 1 connects drill rod, it is characterised in that: (5) at the bottom of female thread tooth
And external screw thread crest (8) is one section of curve on circular arc, ellipse, parabola or hyperbola.
Boring by percussion drilling tool the most according to claim 2, 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.
4. connect drill rod according to the impact type compound thread described in claim 1 or 2 or 3, it is characterised in that: drill steel (2)
For the multidiameter structure with stage casing (2-2), it is connected by the conical surface shaft shoulder (2-3) between external thread section (2-1) with stage casing (2-2)
Transition, has the inner conical surface (1-3) suitable with this shaft shoulder at the aperture of tapped blind hole (1-2)；The shaft shoulder (2-3) and drill steel (2) axle
Angle γ between line is 1～10 °.
Impact type compound thread the most according to claim 4 connects drill rod, it is characterised in that: described angle γ is
4°。
6. connect drill rod according to the impact type compound thread described in claim 1 or 2 or 3, it is characterised in that: described angle
β is 5 °.
Impact type compound thread the most according to claim 4 connects drill rod, it is characterised in that: described angle β is 5 °.
8. connect drill rod according to the impact type compound thread described in claim 1 or 2 or 3, it is characterised in that: tapped blind hole
(1-2) and at the bottom of hole, between (1-1), have escape (1-4).
Impact type compound thread the most according to claim 4 connects drill rod, it is characterised in that: tapped blind hole (1-2)
And there is escape (1-4) at the bottom of hole between (1-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738737.2A CN106089116B (en) | 2016-08-29 | 2016-08-29 | Impact type compound thread connects drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738737.2A CN106089116B (en) | 2016-08-29 | 2016-08-29 | Impact type compound thread connects drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106089116A true CN106089116A (en) | 2016-11-09 |
| CN106089116B CN106089116B (en) | 2018-08-17 |
Family
ID=57226412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610738737.2A Active CN106089116B (en) | 2016-08-29 | 2016-08-29 | Impact type compound thread connects drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106089116B (en) |
Cited By (2)
| 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 |
| CN108590542A (en) * | 2018-06-21 | 2018-09-28 | 上海海隆石油管材研究所 | A kind of screw connection structure |
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 |
| CN206144484U (en) * | 2016-08-29 | 2017-05-03 | 贵州捷盛钻具股份有限公司 | Compound threaded connection rock drilling brazing tool of impacted style |
-
2016
- 2016-08-29 CN CN201610738737.2A patent/CN106089116B/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 |
| CN206144484U (en) * | 2016-08-29 | 2017-05-03 | 贵州捷盛钻具股份有限公司 | Compound threaded connection rock drilling brazing tool of impacted style |
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 |
| CN108590542A (en) * | 2018-06-21 | 2018-09-28 | 上海海隆石油管材研究所 | A kind of screw connection structure |
| CN108590542B (en) * | 2018-06-21 | 2023-10-24 | 上海海隆石油管材研究所 | Threaded connection structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106089116B (en) | 2018-08-17 |
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