CN109025830B - A kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit - Google Patents
A kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit Download PDFInfo
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- CN109025830B CN109025830B CN201810970861.0A CN201810970861A CN109025830B CN 109025830 B CN109025830 B CN 109025830B CN 201810970861 A CN201810970861 A CN 201810970861A CN 109025830 B CN109025830 B CN 109025830B
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Classifications
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- 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
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
-
- 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
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Abstract
The invention discloses a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bits, are mainly made of four parts, and first part is the collar hole drill bit crept into for collar hole, and the drilling fluid spray-hole and double helix dregs guiding groove for being equipped with cleaning shaft bottom, assisting chip removal；Second part is the reaming bit of further expansion wellbore, and is equipped with the channel of chip removal and chip space for being conducive to landwaste discharge；Part III is the device for thinning and fastening means refined for major diameter hydrate silt adhesive bond；Part IV is that the tapered runner for increasing drilling fluid jet velocity inside bit body is arranged in.The present invention pointedly considers deep water shallow layer gas hydrate layer structure transitivity, and combine demand of the fluidisation production practice to drill bit, it not only realizes the refinement and fluidisation to the cementing bulky grain landwaste of hydrate silt, the problems such as also solving landwaste deposition, poor fluidity and bit freezing in long range horizontal drilling, to ensure hydrate layer horizontal segment efficient rock-breaking and drilling efficiency.
Description
Technical field
The present invention relates to exploitation of gas hydrates technical field, in particular to a kind of deep water shallow layer gas hydrate is solid
State fluidizes mine drilling bit.
Background technique
Gas hydrates are closed under the conditions of high pressure (> 10MPa) and low temperature (0~10 DEG C) by natural gas and hydrone
At one kind " cage compound ".80%~90% ingredient is methane in gas hydrates, therefore also referred to as methane hydrate, because of it
Most white or greyish crystals, be alike in appearance ice and snow, can be ignited as alcohol block, so, it is also referred to as " flammable
Ice ".Gas hydrates are worldwide widely present, it has been found that gas hydrates be primarily present in Arctic
In permafrost area and worldwide seabed, Lu Po, continental rise and trench, storage channel type mainly has sandrock-type, sandstone
Crack type, particulate crack type and dispersing type.It is estimated that the area of land 20.7% and Oceanic Bottom 90%, has and forms natural gas
The advantage of hydrate.Therefore, most gas hydrates are distributed in ocean, and stock number is land
100 times or more.2011, in the world it has been found that gas hydrate up to 116 at, the thick, scale of ore bed it
It greatly, is that conventional gas field can not be compared.
A big hot spot of the research of gas hydrates as contemporary geoscience and energy industry development.Currently, various countries
All explore how exploitation of gas hydrate.Shallow with buried depth based on China's Gas Hydrate In Sea Areas drill sampling reservoir,
No fine and close cap rock, non-diagenesis, it is weak it is cementing, be easy to the features such as fragmentation, related science man proposes for the non-diagenesis day of deep-sea shallow-layer
Right gas hydrate solid state fluidizing technique.The core concept of solid state fluidizing production practice is by the non-diagenesis natural gas hydration of deep water shallow-layer
Object ore body is transferred to closed gas, liquid, solid multiphase by Mechanical Crushing fluidisation and lifts in pipeline, utilizes sea water temperature in lifting process
The natural law that degree increases, hydrostatic pressure reduces makes hydrate gradually gasify, and becomes non-diagenesis gas hydrate dissociation process
Uncontrollable is controllable, to realize the safe and efficient exploitation of sea-bottom shallow gas hydrates.
Currently, deep water shallow layer gas hydrate solid state fluidizing production practice implementation need largely configure and design it is proprietary
Equipment and downhole tool and meet solid state fluidizing production practice wherein inventing a kind of for hydrate layer structure and physical property and need
The drill bit asked is the key that realize shallow-layer hydrate layer horizontal segment efficient rock-breaking and drilling.However, being bored currently for hydrate layer
Into only matching existing drill bit, and the design of existing drill bit not yet considers sea-bottom shallow gas hydrates structure transitivity, does not also tie
Sea-bottom shallow hydrate solid state fluidizing production practice demand is closed, therefore is an impediment to realize the efficiency crushing and drilling of hydrate layer.
In addition, major diameter hydrate silt cement particle can be generated by being crushed hydrate rock stratum using existing drill bit, however major diameter water
Object cutting grain poor fluidity is closed, causes the hydrate being crushed to be not easy to be inhaled into hydrate recovery approach, to reduce hydration
The object silt slurry velocity of discharge, or even the serious consequences such as mud drum, bit freezing can be generated, it is an impediment to gas hydrates solid flow and melts
The implementation of excavating technology.Meanwhile in view of sea-bottom shallow gas hydrates layer at the feature of hiding structure, in order to increase well yield,
It realizes commercialization exploitation, horizontal patterns is mainly used to it at present.So the drilling phase of deep water shallow-layer hydrate exploitation relates to
And hydrate layer long horizontal sections drilling, and the binding materials such as hydrate, silt are easy to be deposited in horizontal segment drilling process
Nearly drill bit and horizontal bottom.Therefore, it in order to realize the safe and efficient exploitation of deep-water subsea shallow layer gas hydrate, needs
One kind is invented for deep water shallow layer gas hydrate layer structure and physical property, and meets the Novel drill of solid state fluidizing production practice
Head.
Summary of the invention
In view of the above technical problems, the present invention provides a kind of exploitations of deep water shallow layer gas hydrate solid state fluidizing to bore
Head, to realize the refinement and fluidisation of hydrate silt major diameter particle, solving bulk landwaste can not be fluidized and horizontal well landwaste deposition
Problem improves the mobility of hydrate silt slurry, improves deep-water subsea shallow layer gas hydrate layer horizontal segment broken rock and brill
Into efficiency.
Technical solution of the present invention is as follows.
A kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit, structure are divided into four parts, and first part is
Collar hole bit body further comprises cutting tip and chip removal part；The cutting tip includes being located at collar hole bit body bottom
The scraping drill bit at end and the crushing teeth of double helix dust lead trench bottom；The chip removal part is double helix dregs guiding groove；Second part
It further comprise cutting tip, chip removal part and coupling part for reaming bit body；The cutting tip includes being distributed in
The L shape wing of drill body side and the cylinder bur tooth being embedded on L shape wing；The chip removal part includes being located in drill body
The channel of chip removal in portion, the chip space between two wing of drill body side and the circular pit positioned at chip removal rooved face；Described
Coupling part includes upper connecting rod, circular groove and the connection screw thread hole of drill bit bottom at the top of reaming bit body；Third portion
It is divided into hydrate particle device for thinning, further comprises coupling part, hermetic unit and refinement part；The coupling part
Including holding screw threaded hole, holding screw and the tapered thread at top；The hermetic unit includes O-ring seals；It is described
Refinement part include circular ring shape drilling fluid injection pipe, drilling fluid delivery pipe and drilling fluid spray-hole；Part IV is drilling fluid
Transportation system comprising all kinds of drilling fluid spray-holes on the tapered runner and drill body of entire drill bit internal.
Its shape of the scraping drill bit of the collar hole bit body cutting tip is the lesser pentagonal prism shape of thickness, in drill bit root
There is the pyramid shape reinforcing rib for improving drill bit intensity, scraping drill bit is structure as a whole with pyramid reinforcing rib；The collar hole
The crushing teeth of bit body cutting tip links together by welding with double helix dregs guiding groove, and the front end of crushing teeth is useful
In the blade of broken drilling, there is the reinforcing rib for reinforcing boring tooth intensity at the top of crushing teeth.
The double helix dregs guiding groove is helically wound around the outer surface of lower connecting rod by two helicoids and is constituted.
Five wings of the reaming bit body side surface are L-shaped, are uniformly distributed along truncated cone-shaped drill body side, in L shape wing
On also inlay the cylinder bur tooth vertical with L shape wing.
Five chip space groove faces of the reaming bit body are arc surface；The cross section of chip space is gradual change shape, and upper end is big
Lower end is small, between two adjacent blades, is distributed in truncated cone-shaped drill body side, is dispersed on chip space groove face several circular
Pit；Five channel of chip removal of the reaming bit body are distributed in inside reaming bit body, and cross section is the sector of gradual change, on
The fan-shaped big lower end sector in end is small.
There are 12 circular grooves on the upper connecting rod surface, and groove is divided into three layers and uniformly arranges, and four every layer, every phase
The alternate angle of groove is 30 degree between two layers adjacent.
Holding screw screw thread number of perforations in the hydrate particle device for thinning connection sleeve lateral wall is 12,
Arrangement mode is consistent with the groove arrangement mode on upper connecting rod surface described in claim 6, and in sleeve inner, there are two O shapes to seal
Circle.
The hydrate particle device for thinning has five drilling fluids along hydrate particle device for thinning radial equipartition defeated
Pipe is sent, delivery pipe one end is connected with the drilling fluid conveying flow passage in the middle part of device for thinning, the other end of runner and external annulus
Shape drilling fluid injection pipe connects together.
Several drilling fluid spray-holes, the spray of circular ring shape drilling fluid are dispersed on the circular ring shape drilling fluid injection pipe medial surface
The injection direction for penetrating drilling fluid spray-hole all on pipe medial surface all converges at certain point at the top of hydrate particle device for thinning.
Drilling fluid conveying flow passage in the conveying system for drilling fluids is located in the middle part of entire drill bit, and shape is tapered
Shape, upper end entrance is big, and lower terminal end is small.
On the collar hole bit body there are three types of drilling fluid spray-holes, respectively drilling well between bottom drilling fluid spray-hole, slot
Liquid spray-hole and bar wall drilling fluid spray-hole wherein there are two bottom drilling fluid spray-holes, are located at scraping bit cylindrical and bore
With, interval angles between the two are 180 degree；Drilling fluid spray-hole shares between two spiral dust lead groove faces between slot
Ten are divided into five layers, two every layer, are spaced 180 degree therebetween, the alternate angle between every adjacent two layers is 90 degree；Bar
Wall drilling fluid spray-hole is located on the lower connecting rod side wall on the top of double helix dregs guiding groove, shares eight and is divided into four layers, every layer two
A, 180 degree of interval, the alternate angle between every adjacent two layers are 45 degree therebetween, and injection direction is against reamer
The chip space of head body.
Collar hole bit body, reaming bit body and the hydrate particle device for thinning is all made of dismountable connection side
Formula has good replaceability.
The present invention due to the adoption of the above technical scheme, the technical effect reached are as follows:
1, since first part of the invention is collar hole bit body, second part is reaming bit body, in drilling process,
A slim-hole is first bored by collar hole drill bit, wellbore, and reaming bit drill body radial ruler are gradually then expanded by reaming bit again
Very little is the process being sequentially increased from top to bottom, and therefore, in drilling process, wellbore is gradually widened process, so this drill bit
Broken for gas hydrates is also an incremental process, this will greatly improve the efficiency of breaking rock of drill bit；
2, since the crushing teeth of collar hole bit body is welded in double helix dust lead trench bottom, so being crushed through crushing teeth natural
Gas hydrate will be easy to be discharged along double helix diversion trench, furthermore be distributed on the connecting rod side wall between double helix dust lead groove face
Drilling fluid spray-hole, during gas hydrates are discharged along double helix dregs guiding groove, the drilling fluid of high speed ejection will
There is a local scour fragmentation to the gas hydrates being just discharged on double helix dregs guiding groove, the drilling fluid of ejection also has
Conducive to the formation of hydrate silt slurry, to increase the expulsion efficiency of gas hydrates sand grain；
It 3, is fan-shaped channel due to there is cross section inside counter-bore head body, so this is beneficial to the hydrate of lower part generation
The discharge of silt slurry, and because being evenly equipped with wing outside reaming bit body and boring the blade of tooth composition, meeting between adjacent two blade
A chip space is formed, this is also beneficial to the discharge of hydrate silt slurry.Many pits are dispersed on chip removal rooved face,
The adsorbable drilling fluid of these pits, makes to form hydrophobic layer between drill body and the external world, and landwaste is prevented to be attached to bit face to reduce
Furthermore drill bit chip removal efficiency can prevent bit face from freezing when low temperature is crept into and bit freezing phenomenon occurs；
4, since bottom drilling fluid spray-hole is located in scraping drill bit drill body, drilling fluid can be provided for bottom scraping drill bit
It significantly more efficient can creep into.Again because bar wall drilling fluid spray-hole is located at double helix chip space top, and its injection direction is all
Against the chip space of reaming bit body, so it can provide drilling fluid, the drilling fluid of high speed ejection for the drilling well of reaming bit
Also the bulk hydrate sand grain that lower part can be discharged has a refining effect；In addition, the drilling fluid of high speed ejection can also be with
The axial velocity for improving hydrate silt slurry, makes the hydrate cement mortar physical efficiency of lower part more efficiently from reaming bit body side surface
Chip space and drill body inside channel of chip removal discharge；
5, high since the injection direction of the spray-hole of hydrate particle device for thinning all converges at the certain point on device top
The drilling fluid that speed ejects can substantially form a pyramidal structure, so will form an area, local decompression below pyramidal structure
Domain, this is beneficial to lower part and is formed by silt slurry to arrange to hydrate particle device for thinning, is flowing through hydrate particle refinement
When device, because the device is with drill bit synchronous rotary, so the drilling well fluid column sprayed by drilling fluid spray-hole is in rotary course
The hydrate sand grain of lower part discharge will be further crushed；Furthermore the drilling fluid of high speed ejection will also improve the hydration of drill bit top
The axial velocity of object silt slurry increases the expulsion efficiency of hydrate silt slurry；
6, since the collar hole bit body of this drill bit, reaming bit body and the coupling part of hydrate particle device for thinning are
Detachable structure, so during actual well drilled, if a certain partial destruction can be replaced and not have to the entire brill of replacement
Head body, which greatly enhances the utilization efficiency of bit body each section.
Detailed description of the invention
The following further describes the present invention with reference to the drawings:
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is top view of the invention；
Fig. 3 is bottom view of the invention；
Fig. 4 is the overall structure diagram of reaming bit body of the invention；
Fig. 5 is the complete section schematic diagram of collar hole bit body of the invention；
Fig. 6 is hydrate particle device for thinning overall schematic of the invention；
Fig. 7 is hydrate particle device for thinning top view of the invention；
Fig. 8 is hydrate particle device for thinning half sectional view of the invention；
Fig. 9 is collar hole bit body overall schematic of the invention；
Figure 10 is collar hole bit body full sectional view of the invention；
Figure 11 is collar hole bit body broken segment enlarged diagram of the invention；
Figure 12 is holding screw connector connection part point partial enlargement diagram of the invention；
Figure 13 is holding screw threaded hole enlarged drawing of the invention；
Figure 14 is the enlarged diagram for the connection screw thread hole that reaming bit body of the invention is connected with collar hole bit body；
Figure 15 is the circular pit operation schematic diagram in reaming bit body truncated cone-shaped drill body of the present invention；
Figure 16 is the injection direction schematic diagram of hydrate particle device for thinning drilling fluid spray-hole of the present invention.
In figure: 1. drilling fluid conveying flow passages；101. drilling fluid conveying flow passage one；102. drilling fluid conveying flow passage two；103.
Drilling fluid conveying flow passage three；2. taper connection screw thread；3. hydrate particle device for thinning；301. sleeve；The conveying of 302. drilling fluids
Pipe；303. drilling fluid spray-holes；304. circular ring shape drilling fluid injection pipes；305. holding screw threaded holes；306.O shape sealing ring；
4. holding screw；5. channel of chip removal；6. wing；7. cutter tooth；8. truncated cone-shaped drill body；9. bar wall drilling fluid spray-hole；10. lower connection
Bar；11. double helix dregs guiding groove；12. drilling fluid spray-hole between slot；13；Bottom drilling fluid spray-hole；14. crushing teeth；1401. broken
Broken tooth tooth body；1402. crushing teeth reinforcing rib；1403. crushing teeth blade；15. scraping drill bit；16. circular groove；It is connected on 17.
Bar；18. chip space；19. connection screw thread；20. scraping drill bit drill body；21. pyramid shape reinforcing rib；22. hydrate silt slurry；
23. drilling fluid；24. circular pit；25. negative pressuren zone；26. connection screw thread hole.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in Fig. 1~16, a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit, its overall structure is by four
Part is constituted.First part is the collar hole bit body of lower part, and collar hole bit body is mainly the company passed through at the top of lower connecting rod (10)
It connects screw thread (19) and reaming bit body links together, have for broken scraping drill bit in the bottom of collar hole bit body
(15), global shape is in pentagonal prism shape, is had in the root of scraping drill bit (15) for improving scraping drill bit (15) intensity
Pyramid shape reinforcing rib (21), the two is structure as a whole；Connect scraping drill bit (15) and lower connecting rod (10) is scraping drill bit
(15) drill body (20), in scraping drill bit drill body (20) side, there are two the bottom drilling fluid spray-holes for being used for jet drilling well liquid
(13)；The double-spiral structure external positioned at lower connecting rod (10) is double helix dregs guiding groove (11), it is wrapped in by two helicoids
It is formed on lower connecting rod (10), is connected to the crushing teeth (14) for broken rock in the bottom end of double helix dregs guiding groove (11),
Drilling fluid spray-hole (12) between slot is distributed on lower connecting rod (10) side wall between two double helix dust lead groove faces (11), in total
There are five layers, every layer of two spray-hole, the alternate angle between adjacent two layers is 90 degree；Lower company in double helix dregs guiding groove (11) upper end
Extension bar (10) side wall is dispersed with bar wall drilling fluid spray-hole (9), and a total of eight are divided into four layers, and every layer of two spray-hole are adjacent
Alternate angle between two layers is 45 degree, and the injection direction in hole is all against the chip space for being located at reaming bit body side surface
(18)；There is the connection screw thread (19) for connecting reaming bit body at the top of lower connecting rod (10).
The second part of drill bit is reaming bit body, and the drill body (8) of reaming bit body is in truncated cone-shaped, in reaming bit body
Side is evenly distributed with five L-shaped wings (6), and wing (6) is structure as a whole with reamer drill body (8), along L shape wing (6)
Outer edge inlays the cylinder bur tooth (7) for being crushed hydrate；It will form one between adjacent two wings (6) to be used for
The chip space (18) of clast is discharged, is dispersed with several circular pits (24) on the surface of chip space (18)；In reamer drill body
(8) internal to be evenly distributed with the channel of chip removal (5) that five cross-sectional shapes are sector, channel is in gradually-reducing shape, small top and big bottom；Expanding
The upper connecting rod (17) that the top of drill body is also used to connect hydrate particle device for thinning (3), transmits torque, upper connection
The useful circular pit (16) for attacking grooved screw formation in bar (17) side, pit (16) are divided into three layers, four every layer for 12 in total
It is uniformly distributed, the alternate angle of pit (16) is 30 degree between adjacent two layers；Have in reaming bit body bottom and is bored for connecting collar hole
The connection screw thread hole (26) of head body.
The Part III of drill bit is hydrate particle device for thinning (3), and the device for thinning and the holding screw in the middle part of it connect
Device is connect to connect together by welding, holding screw connector include matches with upper connecting rod (17) sleeve (301), tightly
Determine screw thread hole (305), holding screw (4), O-ring seal (306) and the connection screw thread (2) for connecting drill string；In sleeve
(301) 12 holding screws (4) and holding screw threaded hole (305), arrangement mode and upper connection is distributed in bottom sidewall
The circular pit (16) on bar (17) surface is corresponding, and in sleeve (301) inner wall, there are two the sealing rings (306) of O shape, in sleeve
It (301) is for connecting the tapered thread of drill string (2) at the top of；The hydrate particle device for thinning (2) is equal by five
Drilling fluid delivery pipe (302) the He Yigen circular ring shape injection pipe (304) of cloth is constituted, the both ends of five drilling fluid delivery pipes (302)
Respectively connected sleeve (301) and with circular ring shape injection pipe (304), be uniformly distributed along the inner sidewall of annular spray pipe (304)
It is several for jet stream refinement lower part discharge hydrate silt major diameter cement particles drilling fluid spray-holes (303).
The Part IV of drill bit is the transportation system of drilling fluid, mainly by the drilling fluid conveying flow passage in the middle part of this drill bit
(1) and the drilling fluid spray-hole of each section is constituted；Drilling fluid conveying flow passage (1) has run through hydrate particle device for thinning (3)
Cylindrical drill body (20) bottom of the scraping drill bit (15) of collar hole bit body bottom is extended to reaming bit body.
The following detailed description of application method of the invention.
When carrying out solid state fluidizing exploitation to sea-bottom shallow gas hydrates using this drill bit, this drill bit mainly does rotary cutting
Movement and feed motion forward are cut, it is small-scale preliminary broken by scraping drill bit (15) progress of collar hole bit body bottom first,
A conical slim-hole is bored, is then sprayed using the crushing teeth (14) of double helix dregs guiding groove (11) bottom in bottom drilling fluid
Further broken rock expands wellbore under the auxiliary of perforation (13), and the broken landwaste generated of crushing teeth (14) is through double helix dregs guiding groove
(11) it is discharged to top, landwaste is on double helix dregs guiding groove (11) in discharge process, and drilling fluid sprays between the slot between double helix groove face
The drilling fluid of perforation (12) high speed ejection can have one to wash away fragmentation the hydrate sand grain being discharged, and
The formation of hydrate silt slurry is accelerated, expulsion efficiency is improved；Due to the lower connecting rod on double helix dregs guiding groove (11) top
(10) it is distributed with bar wall drilling fluid spray-hole (9) on, and its injection direction is against the chip space (18) of top reaming bit body,
So from double helix dregs guiding groove (11) be discharged hydrate silt slurry when flowing through upper space, bar wall drilling fluid spray-hole
(9) one initial velocity of hydrate silt slurry that jet-action can be discharged to double helix dregs guiding groove (11), can be more rapidly
Efficiently by the channel of chip removal (5) inside reaming bit body, and its drilling fluid ejected is during with bit
Also can the hydrate silt cement particle to major diameter have certain fragmentation.
On the basis of collar hole bit body institute's bored borehole, reaming bit knows from experience further broken rock and expands wellbore, reaming
Bit body broken rock is mainly to pass through the cylinder bur tooth (7) inlayed on its truncated cone-shaped drill body (8) side wing (6) to carry out rock
Layer is crushed, and being crushed the clast generated can be under the auxiliary for the drilling fluid that bar wall drilling fluid spray-hole (9) is sprayed from adjacent two
Chip space (18) discharge between wing (6).The hydrate silt slurry of discharge will flow to the hydration on reaming bit body top
Composition granule device for thinning (3), because the drilling fluid that hydrate particle device for thinning (3) is sprayed can converge in its a certain area in top
Domain, to form a pyramidal structure, so will form a local decompression region (25) below pyramidal structure, this is beneficial to
Lower part is formed by silt slurry and arranges to hydrate particle device for thinning (3), when flowing through hydrate particle device for thinning (3),
Because the device is with drill bit synchronous rotary, so the drilling well fluid column of rotating-spray generates the hydrate silt adhesive bond to bulky grain
Crushing effect, additionally due to its injection direction be tilt upward, so this also will improve hydrate silt slurry axial velocity,
To improve the expulsion efficiency of hydrate silt slurry.The hydrate slurry of discharge will be discharged to hydrate slurry separator and be divided
From, the hydrate after separation is discharged into hydrate storage tank, separate generation silt then pass through backfill channel, filling mining area to
It is dangerous to reduce mined out region collapsing.
In addition, because holding screw connector can transmit high torque, so in reamer and hydrate particle device for thinning
Between be attached using holding screw connector, after installing O-ring seals (306) in the sleeve (301), by reamer
In connecting rod (17) insertion sleeve (301) of head body, grooved screw then is attacked by 12 again and is all screwed home, sleeve is prevented
(301) opposite with connecting rod (17) to slide, then, grooved screw will be all attacked for the first time and twists two circles, if All going well, then will be every
A grooved screw of attacking continues to twist two circles, and completion attacks after slot and will attack grooved screw again and change holding screw (4) into；At the top of sleeve is taper
Connection screw thread (2), is connected with drill string, torque needed for transmitting is crept into.Again because the drilling fluid conveying flow passage (1) in the middle part of drill bit is gradually
Contracting shape, this will improve the injection pressure of lower part drilling fluid spray-hole, make it that drill bit preferably be assisted to creep into.
The present invention can also be used in the exploitation of frozen soil layer gas hydrates.
The present invention includes but is not limited to above embodiment, any to meet the claims or specification description, is met
With principles disclosed herein and novelty, the method for inventive features, technique, product, protection scope of the present invention is each fallen within
Within.
Claims (12)
1. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit, structure are divided into four parts；First part is neck
Drill body, further comprises cutting tip and chip removal part, and the cutting tip includes being located at collar hole bit body bottom end
Scraping drill bit (15) and double helix dregs guiding groove (11) bottom crushing teeth (14), the chip removal part be double helix dregs guiding groove
(11)；Second part is reaming bit body, further comprises cutting tip, chip removal part and coupling part, the cutting
Part includes the cylinder bur tooth (7) for being distributed in the L shape wing (6) of drill body side and being embedded on L shape wing (6), described
Chip removal part include the channel of chip removal (5) inside the drill body, the chip space (18) between two wing of drill body side and
Circular pit (24) positioned at chip space (18) surface, the coupling part include the upper connecting rod at the top of reaming bit body
(17), the connection screw thread hole (26) of circular groove (16) and drill bit bottom；Part III is hydrate particle device for thinning
It (3), further comprise coupling part, hermetic unit and refinement part, the coupling part includes holding screw threaded hole
(305), the tapered thread (2) of holding screw (4) and top, the hermetic unit includes O-ring seals (306), described
Refinement part includes circular ring shape drilling fluid injection pipe (304), drilling fluid delivery pipe (302) and drilling fluid spray-hole (303)；4th
Part is conveying system for drilling fluids comprising all kinds of drilling wells on the tapered runner (1) and drill body of entire drill bit internal
Liquid spray-hole.
2. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
Scraping drill bit (15) its shape of the collar hole bit body cutting tip is the lesser pentagonal prism shape of thickness, useful in drill bit root
In the pyramid shape reinforcing rib (21) for improving drill bit intensity, scraping drill bit (15) and pyramid shape reinforcing rib (21) are integrated knot
Structure；The crushing teeth (14) of the collar hole bit body cutting tip and double helix dregs guiding groove (11) are connected to one by welding
It rises, there is the blade (1403) for broken drilling in the front end of crushing teeth, has at the top of crushing teeth for reinforcing boring adding for tooth intensity
Strengthening tendons (1402).
3. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
The double helix dregs guiding groove (11) is helically wound around the outer surface of lower connecting rod (10) by two helicoids and is constituted.
4. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
The wing (6) is five, and five wings (6) for being located at reaming bit body side surface are L-shaped, along truncated cone-shaped drill body (8) side
Face is uniformly distributed, and the cylinder bur tooth (7) vertical with L shape wing (6) is also inlayed on L shape wing (6).
5. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
The chip space (18) is five, and five chip space (18) groove faces positioned at reaming bit body are arc surface；Chip space (18)
Cross section be gradual change shape, it is small top and big bottom, between two adjacent blades (6), be distributed in truncated cone-shaped drill body (8) side,
Several circular pits (24) are dispersed on chip space (18) groove face；Five channel of chip removal (5) of the reaming bit body are equal
It is distributed in inside reaming bit body, cross section is the sector of gradual change, and the fan-shaped big lower end sector in upper end is small.
6. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
There are 12 circular grooves (16) on described upper connecting rod (17) surface, and groove (16) is divided into three layers and uniformly arranges, and four every layer,
The alternate angle of groove (16) is 30 degree between every adjacent two layers.
7. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
The interconnecting piece of the hydrate particle device for thinning (3) further includes connection sleeve (301), and holding screw threaded hole (305) counts
Mesh is 12, and 12 holding screw threaded holes (305) are respectively positioned on connection sleeve (301) side wall, holding screw threaded hole
(305) it is divided into three layers uniformly to arrange, four every layer, the alternate angle of holding screw threaded hole (305) is 30 between every adjacent two layers
Degree, in connection sleeve (301) inside, there are two O-ring seals (306).
8. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
The hydrate particle device for thinning (3) has five drilling fluids along hydrate particle device for thinning (3) radial equipartition to convey
It manages (302), delivery pipe (302) one end is connected with the drilling fluid conveying flow passage (101) in the middle part of device for thinning, the other end of runner
It connects together with external circular ring shape drilling fluid injection pipe (304).
9. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, it is characterised in that:
Several drilling fluid spray-holes (303), circular ring shape drilling fluid are dispersed on described circular ring shape drilling fluid injection pipe (304) medial surface
The injection direction of all drilling fluid spray-holes (303) all converges at hydrate particle refinement dress on injection pipe (304) medial surface
Set certain point at the top of (3).
10. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, feature exist
In: the drilling fluid conveying flow passage (101,102,103) in the conveying system for drilling fluids is located in the middle part of entire drill bit, shape
To be tapered, upper end entrance is big, and lower terminal end is small.
11. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, feature exist
In: on the collar hole bit body there are three types of drilling fluid spray-holes, drilling fluid respectively between bottom drilling fluid spray-hole (13), slot
Spray-hole (12) and bar wall drilling fluid spray-hole (9) wherein there are two bottom drilling fluid spray-holes (13), are located at scraping drill bit
(15) on cylindrical drill body (20), interval angles between the two are 180 degree；Drilling fluid spray-hole (12) is located at two between slot
Between spiral dust lead groove face, shares ten and be divided into five layers, two every layer, be spaced 180 degree therebetween, every adjacent two layers
Between alternate angle be 90 degree；Bar wall drilling fluid spray-hole (9) is located at the lower connecting rod on the top of double helix dregs guiding groove (11)
(10) on side wall, eight is shared and is divided into four layers, two every layer, 180 degree of interval therebetween, between every adjacent two layers
Alternate angle is 45 degree, chip space (18) of the injection direction against reaming bit body.
12. a kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit according to claim 1, feature exist
In: collar hole bit body, reaming bit body and the hydrate particle device for thinning is all made of dismountable connection type, has
Good replaceability.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810970861.0A CN109025830B (en) | 2018-08-24 | 2018-08-24 | A kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810970861.0A CN109025830B (en) | 2018-08-24 | 2018-08-24 | A kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit |
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| CN109025830A CN109025830A (en) | 2018-12-18 |
| CN109025830B true CN109025830B (en) | 2019-07-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915020B (en) * | 2019-02-27 | 2020-09-11 | 成都理工大学 | Drilling bit for seabed shallow layer natural gas hydrate |
| CN111577214A (en) * | 2020-06-24 | 2020-08-25 | 中国海洋石油集团有限公司 | Water jet injector head for seabed natural gas hydrate solid fluidization exploitation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003041877A (en) * | 2001-07-31 | 2003-02-13 | Nippon Beesu Kk | Excavation head |
| JP2006045994A (en) * | 2004-08-06 | 2006-02-16 | Nishimatsu Constr Co Ltd | Excavating member, excavating method, and soil improving method using the excavating member |
| CN102322219A (en) * | 2011-05-26 | 2012-01-18 | 上海交通大学 | Seabed jet drill truck |
| CN102561953A (en) * | 2012-01-18 | 2012-07-11 | 西南石油大学 | Self-adapting hybrid bit |
| CN104763348A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type drilling and expanding integral drilling tool and drilling and hole expandin method thereof |
| CN104763343A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type multi-stage hole expanding drilling tool and hole expanding method thereof |
-
2018
- 2018-08-24 CN CN201810970861.0A patent/CN109025830B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003041877A (en) * | 2001-07-31 | 2003-02-13 | Nippon Beesu Kk | Excavation head |
| JP2006045994A (en) * | 2004-08-06 | 2006-02-16 | Nishimatsu Constr Co Ltd | Excavating member, excavating method, and soil improving method using the excavating member |
| CN102322219A (en) * | 2011-05-26 | 2012-01-18 | 上海交通大学 | Seabed jet drill truck |
| CN102561953A (en) * | 2012-01-18 | 2012-07-11 | 西南石油大学 | Self-adapting hybrid bit |
| CN104763348A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type drilling and expanding integral drilling tool and drilling and hole expandin method thereof |
| CN104763343A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type multi-stage hole expanding drilling tool and hole expanding method thereof |
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| CN109025830A (en) | 2018-12-18 |
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