CN206581893U - A kind of Air Reverse Circulation continuous coring ice auger drill bit - Google Patents
A kind of Air Reverse Circulation continuous coring ice auger drill bit Download PDFInfo
- Publication number
- CN206581893U CN206581893U CN201720283048.7U CN201720283048U CN206581893U CN 206581893 U CN206581893 U CN 206581893U CN 201720283048 U CN201720283048 U CN 201720283048U CN 206581893 U CN206581893 U CN 206581893U
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- CN
- China
- Prior art keywords
- double
- bit body
- walled joint
- bit
- kuppe
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Abstract
The utility model discloses a kind of Air Reverse Circulation continuous coring ice auger drill bit, its bit body is connected with the double-walled joint external pipe thread of double-walled joint, several cutter tips are bolted on the bottom labial surface of bit body, cutter tip anterior angle to bit central channel direction tilt angle alpha be 5~15 °, pad footwear are connected by bolt with cutter tip and bit body, hold jet pipe to be connected through a screw thread with bit body, the disconnected device of moral purity card is fixed in bit body interior step.Hold jet pipe and double-walled joint inner tube composition circumferential weld gap.Double-walled joint outer tube and double-walled joint inner tube composition annular space, between the two provided with support block.Kuppe is connected by screw thread with double-walled joint external pipe thread, and kuppe constitutes with bit body outer wall and offers some air admission holes on nozzle ring, double-walled joint outer tube.The utility model improves drilling efficiency and moral purity taking rate, so as to significantly shorten the polar drilling engineering construction cycle, reduction produces the risk of complex accident in hole.
Description
Technical field
The utility model patent belongs to polar drilling technical field, is related to a kind of Air Reverse Circulation continuous coring ice sheet drilling
Use drill bit.
Background technology
Polar ice sheet accounts for the 10% of Global land area, and its natural environment has important value to the mankind.Due to polar region
Ice sheet temperature is low, be far from the crowd pollution, has compared with other Climatic Proxys and contains much information and fidelity is good, time resolution
The features such as rate is high, time scale scope is big, distribution area is wide, is to study one of the most key area of Global climate change.It is logical
Ice sheet core drilling technology is crossed, obtain high-quality moral purity turns into the important research direction of polar science, to human social development
There is important scientific meaning and social value with the cognition to nature.But by harsh weather and the shadow of earth's surface ice and snow environment
Ring, polar drilling core it is complex, at present frequently with armored cable formula electric mechanical core drill carry out ice sheet core drilling.
Motor machine drilling tool is delivered in hole and crept into by this method using armored cable, round trip terminate after using cable by drilling tool carry to
Earth's surface obtains moral purity and ice bits, then again transfers drilling tool to bottom hole and continues to creep into, goes round and begins again.Because this method needs to carry brill
Core, drilling non-cutting time is long, and drilling efficiency is low, and due to replacing conventional drill using armored cable, once block in hole
The complex accidents such as brill, are handled extremely difficult.Therefore, core drilling construction period in polar region is longer, seriously constrains polar drilling section
The development of technology.In addition, existing drilling method uses drilling fluid as circulatory mediator, in ice sheet top snow cover and snow ice layer
During construction, drilling fluid is easily missed and pollutes polar region natural environment, and drilling fluid also has a certain impact to moral purity, therefore is badly in need of
A kind of environmental protection, safety, quick core drilling technology.In recent years, Air Reverse Circulation continuous coring drilling technology is not because it is with
Stop boring continuous coring, drilling efficiency and rate of coring it is high, it is pollution-free to rock core the advantages of, obtained in conventional geological core drilling field
It is widely applied.If applying it in ice layer of polar region probing, polar drilling drilling efficiency will be greatly improved.Yet with
Ice sheet is different from the physical parameter of rock stratum, and conventional geological core drilling is difficult to effectively creep into ice sheet with reverse circulation drill bit.Drill bit knot
Structure is one of critical component of air reverse circulation drilling, and its performance directly decides the success or failure of reverse circulation drilling, if reacting cycle
Form not thorough, ice bits will be caused to be sprayed from the annular space of drilling tool and ice wall, moral purity ice sample taking rate, Er Qieying is not only reduced
Drilling efficiency is rung, or even can occur complex accident in the holes such as bit freezing.How to design and be capable of the air of fast drilling ice sheet and counter follow
Ring core bit, it has also become implement air reverse circulation drilling urgent problem in polar ice sheet.
The content of the invention
The purpose of this utility model is to provide a kind of can have the strong suction to make by fast drilling in ice sheet to bottom hole
Air Reverse Circulation continuous coring ice auger drill bit.
The utility model includes bit body, holds jet pipe, moral purity card disconnected device, cutter tip, double-walled joint, kuppe and pad
Footwear, bit body is connected with the double-walled joint external pipe thread of double-walled joint, and several are bolted on the bottom labial surface of bit body
Cutter tip, cutter tip anterior angle is 5~15 ° to bit central channel direction tilt angle alpha, is easy to ice to consider to be worth doing and is transported to central passage
Move.The cutting depth of cutter tip is controlled by pad footwear, and pad footwear are connected by bolt with cutter tip and bit body.Bit body bottom lip
Face is camber face.Hold jet pipe to be connected through a screw thread with bit body, the disconnected device of moral purity card is fixed in bit body interior step.
The disconnected device of moral purity card is made up of semicircle wedge structure and semicircular structure, is held jet pipe and is constituted circumferential weld with double-walled joint inner tube
Gap.Double-walled joint outer tube and double-walled joint inner tube composition annular space,
Support block is provided between double-walled joint outer tube and double-walled joint inner tube, kuppe passes through screw thread and double-walled joint outer tube
Threaded connection, kuppe constitutes with bit body outer wall and offers some air admission holes on nozzle ring, double-walled joint outer tube.
Working process and principle of the present utility model：
The gas come in from hole internally-powered drilling tool or double-wall drill pipe enters the annular space of the double-walled joint of drill bit, a part
The annular space entered by the air admission hole opened up on double-walled joint outer tube between kuppe and bit body sprays downwards, in Ke's grace
Flowed up to the lower gas of attached wall effect along arc towards bit central passage, swabbing action produced to the ice bits and gas of bottom hole,
Form reacting cycle.Another part gas sprays via the extremely narrow circumferential weld gap held between jet pipe and double-walled joint inner tube, forms pole
Thin high-speed jet, device to hole spirit body and ice bits produce powerful secondary swabbing action.With the continuous progress of drilling, moral purity is high
Degree gradually increase, when its touch moral purity card break device semicircle wedge structure when, by moral purity card break device lateral compression power and
Fracture, carried by gas return to earth's surface immediately, realized and do not carry brill continuous coring in drilling process.
The beneficial effects of the utility model：
When annular space of the gas between kuppe and bit body outer wall sprays at a high speed, due to the attached wall effect of coanda
Should, gas flows along bit body arcuate bottom labial surface and enters bit central passage, has stronger swabbing action to bottom hole.Separately
When a part of gas is by holding jet pipe and the nozzle ring ejection of double-walled joint inner tube formation, secondary suction is produced to bottom hole and is made
With, beneficial to remove ice bits and form effective reacting cycle, can realize do not stop bore continuous coring, be conducive to improve drilling efficiency and
Moral purity taking rate, so as to significantly shorten the polar drilling engineering construction cycle, reduction produces the risk of complex accident in hole.
Brief description of the drawings
Fig. 1 is diagrammatic cross-section of the present utility model.
Fig. 2 is Fig. 1 upward view.
Fig. 3 is the disconnected device schematic diagram of moral purity card of the present utility model.
Fig. 4 is cutter tip structural representation of the present utility model.
Wherein：1- bit bodys；101- arcwall faces；2- holds jet pipe；201- circumferential welds gap；3- moral purity card breaks device；301- semicircles
Wedge structure；302- semicircular structures；4- cutter tips；5- double-walled joints；501- double-walled joint inner tubes；Outside 502- double-walled joints
Pipe；503- support blocks；504- annular spaces；505- air admission holes；6- kuppes；601- nozzle rings；7- pad footwear.
Embodiment
Refer to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the present embodiment include bit body 1, hold jet pipe 2, moral purity card break device 3,
Cutter tip 4, double-walled joint 5, kuppe 6 and pad footwear 7, the screw thread of double-walled joint outer tube 502 of bit body 1 and double-walled joint 5 connect
Connect, be bolted several cutter tips 4 on the bottom labial surface of bit body 1, the anterior angle of cutter tip 4 is to bit central passage side
It is 5~15 ° to tilt angle alpha, is easy to ice to consider to be worth doing and is migrated to central passage.The cutting depth of cutter tip 4 is controlled by pad footwear 7, pad
Footwear 7 are connected by bolt with cutter tip 4 and bit body 1.The bottom labial surface of bit body 1 is camber face 101.Hold jet pipe 2 and drill bit
Body 1 is connected through a screw thread, and the disconnected device 3 of moral purity card is fixed in the interior step of bit body 1.
The disconnected device 3 of moral purity card is made up of semicircle wedge structure 301 and semicircular structure 302, holds jet pipe 2 and double-walled joint inner tube
501 composition circumferential weld gaps 201.Double-walled joint outer tube 502 and the composition annular space 504 of double-walled joint inner tube 501,
Be provided with support block 503 between double-walled joint outer tube 502 and double-walled joint inner tube 501, kuppe 6 by screw thread with it is double
Wall joint outer tube 502 is threadedly coupled, and kuppe 6 is constituted with the outer wall of bit body 1 and opened on nozzle ring 601, double-walled joint outer tube 502
Provided with some air admission holes 505.
The working process and principle of the present embodiment：
The gas come in from hole internally-powered drilling tool or double-wall drill pipe enters the annular space 504 of the double-walled joint 5 of drill bit, one
The nozzle ring 601 that part is entered between kuppe 6 and bit body 1 by the air admission hole 505 opened up on double-walled joint outer tube 502
Injection downwards, gas flows along arcwall face 101 to bit central passage under the effect of coanda attached wall, ice bits to bottom hole and
Gas produces swabbing action, forms reacting cycle.Another part gas is via the pole held between jet pipe 2 and double-walled joint inner tube 501
Narrow circumferential weld gap 201 sprays, and forms very thin high-speed jet, and device to hole spirit body and ice bits produce powerful secondary swabbing action.
With the continuous progress of drilling, moral purity height gradually increases, when it touches the semicircle wedge structure 301 of the disconnected device 3 of moral purity card,
Fractureed by the lateral compression power of the disconnected device 3 of moral purity card, carried by gas return to earth's surface immediately, realized in drilling process and do not carry
Bore continuous coring.
Claims (1)
1. a kind of Air Reverse Circulation continuous coring ice auger drill bit, including bit body (1), hold jet pipe (2), moral purity card break device (3), cut
Sharpener head (4), double-walled joint (5) and pad footwear (7), it is characterised in that：Also include kuppe (6), kuppe (6) passes through screw thread
It is threadedly coupled with double-walled joint outer tube (502), kuppe (6) and bit body (1) outer wall composition nozzle ring (601), bit body
(1) bottom labial surface is arcwall face (101)；Several cutter tips (4) are bolted on the bottom labial surface of bit body (1), are cut
Cutter head (4) anterior angle is 5~15 ° to bit central channel direction tilt angle alpha, and its cutting depth is controlled by pad footwear (7)；Moral purity card
Disconnected device (3) is made up of semicircle wedge structure (301) and semicircular structure (302), is held jet pipe (2) and is compressed the disconnected device (3) of moral purity card
In bit body (1) interior step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720283048.7U CN206581893U (en) | 2017-03-22 | 2017-03-22 | A kind of Air Reverse Circulation continuous coring ice auger drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720283048.7U CN206581893U (en) | 2017-03-22 | 2017-03-22 | A kind of Air Reverse Circulation continuous coring ice auger drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206581893U true CN206581893U (en) | 2017-10-24 |
Family
ID=60114424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720283048.7U Expired - Fee Related CN206581893U (en) | 2017-03-22 | 2017-03-22 | A kind of Air Reverse Circulation continuous coring ice auger drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206581893U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677707A (en) * | 2017-03-22 | 2017-05-17 | 吉林大学 | Air reverse circulation continuous coring ice drill bit |
-
2017
- 2017-03-22 CN CN201720283048.7U patent/CN206581893U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677707A (en) * | 2017-03-22 | 2017-05-17 | 吉林大学 | Air reverse circulation continuous coring ice drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171024 Termination date: 20190322 |