CN106050150A - Reverse-spiral conical PDC drill bit capable of preventing hole collapse and used for soft rock drilling - Google Patents
Reverse-spiral conical PDC drill bit capable of preventing hole collapse and used for soft rock drilling Download PDFInfo
- Publication number
- CN106050150A CN106050150A CN201610349515.1A CN201610349515A CN106050150A CN 106050150 A CN106050150 A CN 106050150A CN 201610349515 A CN201610349515 A CN 201610349515A CN 106050150 A CN106050150 A CN 106050150A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- soft rock
- pdc drill
- backpitch
- inverted cone
- 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.)
- Pending
Links
- 239000011435 rock Substances 0.000 title claims abstract description 30
- 238000005553 drilling Methods 0.000 title claims abstract description 28
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000036346 tooth eruption Effects 0.000 abstract 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007480 spreading Effects 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
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
A reverse-spiral conical PDC drill bit capable of preventing hole collapse and used for soft rock drilling comprises a drill bit body, main cutting teeth and auxiliary cutting teeth. The lower end of the drill bit body is connected with an inverted-cone-shaped connecting part, the lower end of the inverted-cone-shaped connecting part is connected with a drill rod, a reverse spiral part is assembled on the inverted-cone-shaped connecting part, and the rotating direction of the reverse spiral part is opposite to the rotating direction of the drill bit in the drilling process. According to the reverse-spiral conical PDC drill bit, the resistance of a drilling tool step surface can be effectively reduced, rock residues pressing a drilling tool can be quickly discharged to the position in front of the cutting teeth, and therefore the drilling tool can be pulled out of a collapsed hole in time.
Description
Technical field
The present invention relates to a kind of drill bit, especially a kind of soft rock creeps into backpitch taper anti-collapse hole PDC drill bit.
Background technology
At high methane or projecting mine, gas pumping become reduction gas bearing capacity, eliminate Coal Seam Outburst Hazard the most direct
Means, hole pumping and mining because its advantage be generally used.Construction drill process in projecting coal bed soft layering or weak coal body
In, easily there is collapse hole and cause pressure to bore, not only affecting pore-forming and conciliate danger effect, also drilling rod, drilling tool etc. are caused great damage
Consumption.At present, also not having a kind of drill bit can effectively solve the problem that, soft rock is easily affected by collapse hole in creeping into causes pressing the technical problem bored.
Summary of the invention
Creep into easily occur collapse hole pressure to bore phenomenon to solve soft rock, have a strong impact on drilling effect and the technology of drilling tool is lost asks
Topic, the invention provides a kind of soft rock and creeps into backpitch taper anti-collapse hole PDC drill bit.
The technical solution used in the present invention is as follows:
A kind of soft rock creeps into backpitch taper anti-collapse hole PDC drill bit, including bit body, and main cutting tooth, secondary cutting tooth, its
It is characterised by: described bit body lower end connects has inverted cone connector, described inverted cone connector bottom to be connected with drilling rod,
Being equipped with reverse acting spiral on described inverted cone connector, direction of rotation when described reverse acting spiral creeps into drill bit is contrary.
Creep into in backpitch taper anti-collapse hole PDC drill bit at above-mentioned soft rock, described inverted cone connector with described reversely
Spiral is one-body molded.
Creep into in backpitch taper anti-collapse hole PDC drill bit at above-mentioned soft rock, described inverted cone connector with described reversely
Spiral welded connects.
Creeping at above-mentioned soft rock uses in backpitch taper anti-collapse hole PDC drill bit, described inverted cone connector lower surface molding
There is conical internal thread hole, be connected with drilling rod by described conical internal thread hole, and the shoulder height between drilling rod is straight less than drilling rod
The 1/10 of footpath.
Creeping into in backpitch taper anti-collapse hole PDC drill bit at above-mentioned soft rock, the covering of described reverse acting spiral length is whole
Tapered connection length, over the entire length, on same cross section, the height of described reverse acting spiral and described inverted cone connect
Part radius sum is equal to or slightly less than the radius of boring.
Creep into in backpitch taper anti-collapse hole PDC drill bit at above-mentioned soft rock, described bit body forms top ventilation
Limbers and ventilation limbers, position, side, all connect with drilling rod.
The technique scheme of the present invention has the advantage that compared to existing technology
1. a kind of soft rock that the present invention provides creeps into backpitch taper anti-collapse hole PDC drill bit, uses inverted cone connector,
Connecting bit body and drilling rod, therefore, the present invention can reduce the impact of bit body step surface largely, subtracts largely
The resistance that macaroni drilling tool pulls out from collapse hole.
2. a kind of soft rock that the present invention provides creeps into backpitch taper anti-collapse hole PDC drill bit, on inverted cone connector
Being assembled with reverse acting spiral, therefore, the present invention can be rotated by continuation before rock slag drains into cutting tooth when collapse hole accident occurs
Side, the pull-out of strong guarantee drill rod boring tool and recovery.
3. a kind of soft rock that the present invention provides creeps into backpitch taper anti-collapse hole PDC drill bit, uses inverted cone connector
And it is equipped with reverse acting spiral, on same cross section, reverse acting spiral height is equal to or smaller with inverted cone connector radius sum
In boring radius, therefore, the present invention can form supporting role to boring, hence it is evident that sluggish collapse hole scope spreading, effectively controls pressure
Live the rock quantity of slag of drilling tool, and the rock slag pushing down drilling tool is drained into rapidly cutting tooth front so that drilling tool quickly pulls out from collapse hole.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below according to the specific embodiment of the present invention and combine
Accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is that one soft rock of the present invention creeps into and (do not shows with backpitch taper anti-collapse hole PDC drill bit structural representation front view
Chip toothed portion)；
Fig. 2 is that one soft rock of the present invention creeps into backpitch taper anti-collapse hole PDC drill bit structural representation top view.
Figure is labeled as: 1-bit body, 2-main cutting tooth, 3-pair cutting tooth, 4-inverted cone connector, 5-reverse acting spiral,
Ventilation limbers, 101-top, ventilation limbers, position, 102-side, 401-conical internal thread hole.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
It is that a kind of soft rock of the present invention creeps into being preferable to carry out with backpitch taper anti-collapse hole PDC drill bit shown in Fig. 1 and Fig. 2
Example.
Described soft rock creeps into backpitch taper anti-collapse hole PDC drill bit, including bit body 1, main cutting tooth 2, secondary cutting tooth
3, described bit body 1 lower end connects inverted cone connector 4, and described inverted cone connector 4 bottom is connected with drilling rod, described
Being equipped with reverse acting spiral 5 on inverted cone connector 4, direction of rotation when described reverse acting spiral 5 creeps into drill bit is contrary.
In the present embodiment, described inverted cone connector 4 is one-body molded with described reverse acting spiral 5.
In the present embodiment, described inverted cone connector 4 lower surface forms conical internal thread hole 401, by described cone
Shape internal thread hole 401 is connected with drilling rod, and the shoulder height between drilling rod is less than the 1/10 of drill pipe diameter.
In the present embodiment, described reverse acting spiral 5 length whole inverted cone connector 4 length of covering, over the entire length,
On same cross section, the height of described reverse acting spiral 5 and described inverted cone connector 4 radius sum are equal to the radius holed.
In the present embodiment, described bit body 1 forms ventilation limbers, top 101 and ventilation limbers, position, side 102,
All connect with drilling rod.
In other embodiments, described inverted cone connector 4 is welded to connect with described reverse acting spiral 5.
In other embodiments, described reverse acting spiral 5 length covers whole inverted cone connector 4 length, in whole length
On, on same cross section, height and the described inverted cone connector 4 radius sum of described reverse acting spiral 5 are slightly less than boring
Radius.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right
For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or
Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or
Change among still in protection scope of the present invention.
Claims (6)
1. soft rock creeps into a backpitch taper anti-collapse hole PDC drill bit, including bit body (1), main cutting tooth (2), secondary cutting
Tooth (3), it is characterised in that: described bit body (1) lower end connects inverted cone connector (4), described inverted cone connector (4)
Bottom is connected with drilling rod, and described inverted cone connector (4) is equipped with reverse acting spiral (5), described reverse acting spiral (5) and drill bit
Direction of rotation when creeping into is contrary.
Soft rock the most according to claim 1 creeps into backpitch taper anti-collapse hole PDC drill bit, it is characterised in that: described fall
Tapered connection (4) is one-body molded with described reverse acting spiral (5).
Soft rock the most according to claim 1 creeps into backpitch taper anti-collapse hole PDC drill bit, it is characterised in that: described fall
Tapered connection (4) is welded to connect with described reverse acting spiral (5).
4. creep into backpitch taper anti-collapse hole PDC drill bit according to the arbitrary described soft rock of claim 1-3, it is characterised in that:
Described inverted cone connector (4) lower surface forms conical internal thread hole (401), by described conical internal thread hole (401) with
Drilling rod connects, and the shoulder height between drilling rod is less than the 1/10 of drill pipe diameter.
5. creep into backpitch taper anti-collapse hole PDC drill bit according to the arbitrary described soft rock of claim 1-3, it is characterised in that:
Described reverse acting spiral (5) length covers whole inverted cone connector (4) length, over the entire length, on same cross section, institute
Height and described inverted cone connector (4) the radius sum of stating reverse acting spiral (5) equal to or slightly less than the radius holed.
6. creeping into according to the arbitrary described a kind of soft rock of claim 1-3 and use backpitch taper anti-collapse hole PDC drill bit, its feature exists
In: form ventilation limbers, top (101) and ventilation limbers, position, side (102) on described bit body (1), all with drilling rod even
Logical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610349515.1A CN106050150A (en) | 2016-05-25 | 2016-05-25 | Reverse-spiral conical PDC drill bit capable of preventing hole collapse and used for soft rock drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610349515.1A CN106050150A (en) | 2016-05-25 | 2016-05-25 | Reverse-spiral conical PDC drill bit capable of preventing hole collapse and used for soft rock drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106050150A true CN106050150A (en) | 2016-10-26 |
Family
ID=57174296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610349515.1A Pending CN106050150A (en) | 2016-05-25 | 2016-05-25 | Reverse-spiral conical PDC drill bit capable of preventing hole collapse and used for soft rock drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106050150A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4727943A (en) * | 1987-01-15 | 1988-03-01 | Wood Roy W | Rotary drill bit |
| US4986375A (en) * | 1989-12-04 | 1991-01-22 | Maher Thomas P | Device for facilitating drill bit retrieval |
| CN103556628A (en) * | 2013-11-17 | 2014-02-05 | 刘守进 | Spiral conical soil compaction pile construction method |
| CN204941353U (en) * | 2015-04-28 | 2016-01-06 | 陈智泉 | Exempt from rotary drilling-head of slagging tap |
-
2016
- 2016-05-25 CN CN201610349515.1A patent/CN106050150A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4727943A (en) * | 1987-01-15 | 1988-03-01 | Wood Roy W | Rotary drill bit |
| US4986375A (en) * | 1989-12-04 | 1991-01-22 | Maher Thomas P | Device for facilitating drill bit retrieval |
| CN103556628A (en) * | 2013-11-17 | 2014-02-05 | 刘守进 | Spiral conical soil compaction pile construction method |
| CN204941353U (en) * | 2015-04-28 | 2016-01-06 | 陈智泉 | Exempt from rotary drilling-head of slagging tap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161026 |
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| RJ01 | Rejection of invention patent application after publication |