CN104389560A - Separation and crushing device of downhole pulverized coals of coalbed methane and method thereof - Google Patents
Separation and crushing device of downhole pulverized coals of coalbed methane and method thereof Download PDFInfo
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- CN104389560A CN104389560A CN201410408937.2A CN201410408937A CN104389560A CN 104389560 A CN104389560 A CN 104389560A CN 201410408937 A CN201410408937 A CN 201410408937A CN 104389560 A CN104389560 A CN 104389560A
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- reducing mechanism
- separation
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
Abstract
The invention discloses a separation and crushing device of downhole pulverized coals of coalbed methane and a method thereof. The settling separation, the crushing and the filtration are performed for the pulverized coals, so that the particle size of the pulverized coals entering a screw pump reaches a normal working range of the screw pump, the accidents of pump blockage, blockage and abrasion caused by the pulverized coals with larger particles entering the screw pump can be effectively prevented, the pump detecting period is prolonged, the development cost of the coalbed methane is reduced, and the blockage of holes of a coalbed methane well by the pulverized coals is prevented; and the device has the advantages of simple structure, convenience for use and high efficiency.
Description
[technical field]
The present invention relates to a kind of separation reducing mechanism, under being specifically related to a kind of coal bed gas well, coal dust is separated reducing mechanism and method thereof.
[background technology]
Coal bed gas, refer to that being stored in coal seam take methane as main component, to be adsorbed on matrix of coal particle surface, part is free in coal hole or is dissolved in hydrocarbon gas in coal seam water, it is the associated minerals resource of coal, belonging to Unconventional forage, is clean, the high-grade energy and industrial chemicals that emerge in the world in nearly ten or twenty year.
The water discharge method of exploiting coal bed methane has a lot: such as: the methods such as sucker rod pump water pumping gas production method, screw pump water pumping gas production method, withdrawal in Gas Production by Use of Electric Submersible Pump method, gaslift water pumping gas production method, jetting water pumping gas production pump method, foam method and optimizing pipe string method.And the method that draining China mainly adopts at present: sucker rod pump water pumping gas production method, screw pump water pumping gas production method and withdrawal in Gas Production by Use of Electric Submersible Pump method are to the gas production of the draining and sleeve pipe that realize oil pipe.This patent adopts the water drainage-gas recovery technology carried out during the mining of screw pump to coal bed gas.
The mining of coal bed gas well is the process of water pumping gas production, step-down continuously, during by screw pump mining, when mining intensity is excessive or when stopping adopting, following problem can be caused: 1. when characteristics of coal powder is greater than 0.5mm (when screw pump normally works, portable characteristics of coal powder is for being less than 0.5mm), screw pump can be made to occur the phenomenons such as holddown, blocking, wearing and tearing, affect the result of use of screw pump; 2. pulverized coal particle can block the eyelet of coal bed gas well, causes Production of Coal-bed Gas Wells decline, permeability reduction, is unfavorable for the mining of coal bed gas.
Nowadays, generally prevent bulky grain powder from entering screw pump by taking over control sandpipe in screw pump entrance, and the generation of holddown phenomenon is prevented in conjunction with oil jacket annulus water injection dilution coal powder density, although adopt this kind of method to reduce the coal powder density entering coal bed gas well, but adopt this kind of method not tackle the problem at its root.
[summary of the invention]
The present invention is directed to the problems referred to above, under providing a kind of coal bed gas well, coal dust is separated reducing mechanism and method thereof, by carrying out sedimentation separation, pulverizing, sedimentation to coal dust, make the normal work not affected screw pump by the characteristics of coal powder of screw pump, and by the blocking of coal bed gas well eyelet can not be caused.
Under the invention provides a kind of coal bed gas well, coal dust is separated reducing mechanism, comprising: seating nipple, mask work cylinder, axle, separation reducing mechanism, filter,
The bottom inwall of described mask work cylinder extends to form a ring-type barrel downwards, and this ring-type barrel inserts in seating nipple and forms a gap with seating nipple inwall,
Described seating nipple is fixedly connected with mask work cylinder, and the top of this seating nipple is provided with at least one air inlet port, and this air inlet port is higher than the least significant end of ring-type barrel, and this air inlet port place is provided with screen cloth,
Describedly to be located in seating nipple and mask work cylinder, and in seating nipple and mask work cylinder radial rotating, the bottom of this axle is provided with a L-type through hole, and the arrival end of this through hole is lower than the bottom being separated reducing mechanism, and the bottom of this through hole is provided with a normally closed type valve,
Described separation reducing mechanism is sheathed on axle, the least significant end of bottom lower than ring-type barrel of this separation reducing mechanism, the arrival end higher than through hole,
Described filter is located at the top the top being sheathed on axle that are separated reducing mechanism, and the external diameter of this filter is equal with the internal diameter of mask work cylinder.
Especially, described filter is screen casing, and this screen casing is fixedly connected with axle, is provided with at least one deck disc type pore in described screen casing vertically, and each layer disc type pore staggers setting, and the cross section of described pore is up big and down small pyramid type.
Especially, described reducing mechanism comprises: one-level is separated reducing mechanism, the second-order separation reducing mechanism, three grades of separation reducing mechanisms, described one-level separation reducing mechanism, the second-order separation reducing mechanism, three grades of separation reducing mechanisms are fixed on axle vertically from top to bottom successively
Described one-level is separated reducing mechanism for being separated wheel, and the top of this separation wheel is lower than the least significant end of ring-type barrel, and this separation wheel is provided with at least 6 blades vertically,
Described the second-order separation reducing mechanism is inducer, and the bottom of this inducer is concordant with the least significant end of ring-type barrel, and the external diameter of this inducer is less than the internal diameter of seating nipple, and this inducer is provided with helical blade,
Described three grades of separation reducing mechanisms are roll-type grinder, the least significant end of this roll-type grinder is concordant with the top of seating nipple, the external diameter of this roll-type grinder is less than the internal diameter of mask work cylinder, and this roll-type grinder is provided with spiral salient, and this spiral salient offers some grooves vertically.
Especially, the lifting angle of described roll-type grinder is 0 ° ~ 30 °.
Especially, described mask work cylinder is provided with the trapezoidal projection identical with roll-type grinder rotation direction or rectangular preiection, and described spiral salient matches with trapezoidal projection or rectangular preiection.
Especially, described helical blade rotation direction is contrary with spiral salient rotation direction.
Especially, the bottom of described axle is provided with taper roll bearing, axle is rotated in seating nipple by taper roll bearing, described taper roll bearing is arranged on seating nipple inwall, and the top of this taper roll bearing is lower than the arrival end of through hole, described taper roll bearing is sealed by sealing ring, bearing (ball) cover.
Especially, the quantity of described air inlet port is 2 ~ 4.
Especially, described separation wheel is fixedly connected on axle by flat key, and the quantity of this separation wheel blade is 6 ~ 12.
Under the present invention also provides a kind of coal bed gas well, coal dust is separated pulverizing filter method, it is characterized in that, comprises the following steps:
S10: water, gas, pulverized coal particle enter in seating nipple along air inlet port after screen filtration;
S20: after screen filtration, the pulverized coal particle separate and subside of larger particles, deposits to normally closed type valve place through hole, when reaching a certain amount of, normally closed type valve is opened, the discharges such as coal dust, and after coal dust is discharged, normally closed type valve is closed;
S30: screw pump rotating band moving axis and the device be fixed on axle thereof rotate, lifting force is produced to the pulverized coal particle after water, gas and step S20 are separated, pulverized coal particle after water, gas and step S20 are separated enters and is separated wheel, be separated wheel and initial gross separation is carried out to water, gas, pulverized coal particle, and pulverized coal particle is pulverized again, period is not deposited to normally closed type valve place by the pulverized coal particle of lifting, when reaching a certain amount of, normally closed type valve is opened, the discharges such as coal dust, after coal dust is discharged, normally closed type valve is closed;
S40: screw pump rotating band moving axis and the device be fixed on axle thereof rotate, lifting force is produced to the pulverized coal particle after water, gas and step S30 pulverize, make it enter inducer, inducer is separated again to water, gas, pulverized coal particle, and pulverizes again pulverized coal particle, period is not deposited to normally closed type valve place by the pulverized coal particle of lifting, when reaching a certain amount of, normally closed type valve is opened, the discharges such as coal dust, after coal dust is discharged, normally closed type valve is closed;
S50: gas, the water of the band coal dust after step S40 is separated continue under the effect of rotating lifting power, enter roll-type grinder, roll-type grinder is separated again to water, gas, pulverized coal particle, and powerful smashing is carried out to pulverized coal particle, period is not deposited to normally closed type valve place, when reaching a certain amount of by the pulverized coal particle of lifting, normally closed type valve is opened, the discharges such as coal dust, after coal dust is discharged, normally closed type valve is closed;
S60: the pulverized coal particle after water, gas and step S50 pulverize is given rise to screen casing bottom by the lifting force that roll-type grinder produces, screen casing filters water, gas, coal dust, water after filtration, gas, pulverized coal particle are discharged along screen casing, enter screw pump entrance, after screw pump supercharging, discharge ground; Unsanctioned pulverized coal particle drops to roll-type grinder and again pulverizes under the effect of roll-type grinder reverse acting spiral power.
Compared to prior art, under coal bed gas well provided by the invention, coal dust is separated reducing mechanism and method thereof, by carrying out sedimentation separation, pulverizing, filtration to pulverized coal particle, in the characteristics of coal powder entering screw pump is reached scope that screw pump normally works, the coal dust of larger particles can be effectively avoided to enter in screw pump, prevent holddown, blocking and wearing and tearing accident, extend pump detection period; Avoid pulverized coal particle to the harm on coal-bed gas exploitation equipment and coal bed gas well stratum, pollution, improve the mining rate of coal bed gas, greatly reduce the cost of the exploitation of coal bed gas, this device has that structure is simple, easy to use, the simple advantage of efficient work, processing technology.
[accompanying drawing explanation]
Fig. 1 is the structural representation that under coal bed gas well of the present invention, coal dust is separated reducing mechanism;
Fig. 2 is that Figure 1B-B locates sectional drawing;
Fig. 3 is the sectional drawing that under coal bed gas well of the present invention, coal dust is separated screen casing in reducing mechanism;
Fig. 4 is the sectional view of L-type through hole of the present invention.
[detailed description of the invention]
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in more detail.
Refer to Fig. 1-Fig. 3, under the invention provides a kind of coal bed gas well, coal dust is separated reducing mechanism, comprising: seating nipple 8, mask work cylinder 10, axle 7, separation reducing mechanism, filter,
The bottom of described mask work cylinder 10 is fixedly connected on the top of seating nipple 8, the bottom inwall of this mask work cylinder 10 extends to form a ring-type barrel 18 downwards, this ring-type barrel 18 inserts in seating nipple 8 and forms a gap 14 with seating nipple 8 inwall, by the setting in gap 14, the water making to enter, gas, coal dust land after a segment distance and start separated pulverizing, avoid water, gas, coal dust when reducing mechanism works to be centrifuged power and to go out air inlet port 12
Described seating nipple 8 is fixedly connected with mask work cylinder 10, the top of this seating nipple 8 is provided with at least individual air inlet port 12, this air inlet port 12 is higher than the least significant end of ring-type barrel 18, and this air inlet port 12 place is provided with screen cloth 13, described screen cloth 13 order number is 180 orders, by arranging screen cloth 13 at air inlet port 12 place, filters out the pulverized coal particle of larger particles, decrease the workload of coal dust reducing mechanism under coal bed gas well
Described axle 7 is located at seating nipple 8 with in mask work cylinder 10, and in seating nipple 8 with mask work cylinder 10 radial rotating, the bottom of this axle 7 is provided with a L-type through hole 71, the arrival end 72 of this through hole 71 is lower than the bottom being separated reducing mechanism, and the bottom of this through hole 71 is provided with a normally closed type valve 2, the structure of described through hole 71 as shown in Figure 4, but be not limited to as shown in Figure 4, described through hole 71 contacts end line with normally closed type valve 2 be a bit of arc curve, this curve top is thin, bottom has a bit thick, to ensure that normally closed type valve 2 is closed similar L-type passage by power effect upwards, operationally, do not have pulverized pulverized coal particle can with fall down on self-weight, when reaching a certain amount of, under gravity, normally closed type valve 2 is opened, pulverized coal particle is discharged,
Described reducing mechanism is sheathed on axle 7, the least significant end of bottom lower than ring-type barrel 18 of this separation reducing mechanism, the arrival end 72 higher than through hole 71,
Described filter is located at the top the top being sheathed on axle 7 that are separated reducing mechanism, and the external diameter of this filter is equal with the internal diameter of mask work cylinder 10.
Especially, described filter is screen casing 16, this screen casing 16 is fixedly connected with axle 7, at least one deck disc type pore 161 is provided with vertically in described screen casing 16, each layer disc type pore 161 staggers setting, and the cross section of described pore 161 is up big and down small pyramid type, and the outer wall of this pore 161 is 7 ° with axial angle, filtered layer by layer by screen casing 16 pairs of pulverized coal particles, play better filtration.
Especially, described reducing mechanism comprises: one-level is separated reducing mechanism, the second-order separation reducing mechanism, three grades of separation reducing mechanisms, described one-level is separated reducing mechanism, the second-order separation reducing mechanism, three grades of separation reducing mechanisms, and the device sequence be fixed on successively from top to bottom on axle 7 carries out separation pulverizing vertically.
Described one-level is separated reducing mechanism for being separated wheel 9, and the top of this separation wheel 9 is lower than the least significant end of ring-type barrel 18, and this separation wheel 9 is provided with at least 6 blades 91 vertically;
Described the second-order separation reducing mechanism is inducer 11, and the bottom of this inducer 11 is concordant with the least significant end of ring-type barrel 18, and the external diameter of this inducer 11 is less than the internal diameter of seating nipple 8, and this inducer 11 is provided with helical blade 111;
Described three grades of separation reducing mechanisms are roll-type grinder 15, the least significant end of this roll-type grinder 15 is concordant with the top of seating nipple 8, the external diameter of this roll-type grinder 15 is less than the internal diameter of mask work cylinder 10, and this roll-type grinder 15 is provided with spiral salient 151, this spiral salient 151 offers some grooves 152 vertically, groove 152 and spiral salient 151 form multiple corner angle, and these corner angle are equivalent to the edge of a knife, carry out powerful smashing to the pulverized coal particle of process.
Especially, the lifting angle C of described roll-type grinder 15 is 0 ° ~ 30 °, by the setting of lifting angle C, makes toothed roller type grinder 15 can produce lifting force while rotation, pulverizes simultaneously to pulverized coal particle.
Especially, described mask work cylinder 10 is provided with the trapezoidal projection identical with roll-type grinder 15 rotation direction or rectangular preiection, and in time assembling, described roll-type grinder 15 is matched by spiral salient 151 with trapezoidal projection or rectangular preiection and is located in seating nipple 10.
Especially, described helical blade 111 is contrary with spiral salient 151 rotation direction, during with work, the rotation direction of helical blade 111 is identical with the direction of rotation of axle 7, now spiral salient 151 rotation direction is contrary with the direction of rotation of axle 7, spiral salient 151 (i.e. roll-type grinder 15) axle reverse acting spiral generation downward force relatively will be made, under the effect of reverse acting spiral power, be not moved down into spiral salient 151 (i.e. roll-type grinder 15) by the pulverized coal particle of screen casing 16 again to pulverize, avoid pulverized coal particle and pile up in screen casing 16 lower end.
Especially, the bottom of described axle 7 is provided with taper roll bearing 6, axle 7 is rotated in seating nipple 8 by taper roll bearing 6, described taper roll bearing 6 is arranged on seating nipple 8 inwall, and the top of this taper roll bearing 6 is lower than the arrival end 72 of through hole 71, described taper roll bearing 6 is by sealing ring 4, bearing (ball) cover 5 seals, taper roll bearing 6 can all bear certain power in axis and radial direction, holddown can be overcome, the phenomenon of pump vibration, and the stationarity of reducing mechanism work can be improved, reduction work produces vibration, friction, the harm to reducing mechanism such as impact.
Especially, the quantity of described air inlet port 12 is 2 ~ 4, the quantity of air inlet port 12 is controlled at 2 ~ 4, not only increases the operating efficiency of reducing mechanism under coal bed gas well, can not increase the work load of reducing mechanism under coal bed gas well simultaneously.
Especially, described separation wheel 9 is fixedly connected on axle 7 by flat key 17, and the quantity that 9 blades 91 are taken turns in this separation is 6 ~ 12.
Under the present invention also provides the present invention also to provide a kind of coal bed gas well, coal dust is separated breaking method, it is characterized in that, comprises the following steps:
S10: water, gas, pulverized coal particle enter in seating nipple 8 along air inlet port 12 after screen cloth 13 filters;
In time working, coal dust under coal bed gas well of the present invention is separated reducing mechanism to be fixed on screw pump, screw pump is started working, axle 7 starts to rotate under the effect of screw pump, water, gas, coal dust enter in seating nipple 8 along air inlet port 12 after screen cloth 13 filters, due to the difference of density, the coal dust separate and subside of larger particles, the gap 14 formed along seating nipple 8 and ring-type barrel 18 declines; Deposit to normally closed type valve 2 place through hole 72, when the gravity that deposition produces is greater than the tensile force of valve 2, open valve and be discharged in " pocket " of well by the coal dust depositing to normally closed type valve 2 place, normally closed type valve 2 is closed afterwards;
S20: the gas of the band coal dust after step S10 filters, water enter and is separated wheel 9, separation wheel 9 pairs of water, gas, pulverized coal particle carry out initial gross separation, and coal dust is tentatively pulverized, not pulverized coal dust deposits to normally closed type valve 2 place under gravity, when reaching a certain amount of, normally closed type valve 2 is opened, the discharges such as coal dust, after coal dust is discharged, normally closed type valve 2 is closed;
Water, gas and step S10 enter and are separated wheel 9 place, separation wheel 9 is driven to rotate while axle 7 rotates, be separated wheel 9 and produce radial centrifugal force and axial lifting force, now pulverized coal particle produces fierce motion and collision under the effect of blade 91, pulverized coal particle is pulverized again, in the process, pulverized pulverized coal particle gravity is less than the space formed being scattered in grading room blade 91 being separated wheel 9 lifting force) in, separatedly take turns 9 lifting force liftings and move up, meanwhile under the influence of centrifugal force, water, gas, coal dust is separated, in the process, be greater than the pulverized coal particle being separated wheel 9 lifting force and be deposited to normally closed type valve 2 place with self gravitation along L-type through hole 7, when the gravity that deposition produces is greater than the tensile force of valve 2, opening valve is discharged in " pocket " of well by the coal dust depositing to normally closed type valve 2 place, normally closed type valve 2 is closed afterwards,
S30: screw pump rotating band moving axis 7 and the device be fixed on axle 7 thereof rotate, lifting force is produced to the pulverized coal particle after water, gas and step S20 pulverize, pulverized coal particle after water, gas and step S20 are pulverized enters and is separated wheel 9, separation wheel 9 pairs of water, gas, pulverized coal particle carry out initial gross separation, and pulverized coal particle is pulverized again, period is not deposited to normally closed type valve 2 place by the pulverized coal particle of lifting, when reaching a certain amount of, normally closed type valve 2 is opened, the discharges such as coal dust, after coal dust is discharged, normally closed type valve 2 is closed;
Water, pulverized coal particle after gas and step S20 pulverize enters inducer 11 under separation wheel 9 produces the effect of lifting force, inducer 11 rotates and produces radial centrifugal force and axial lifting force, now coal dust again produces fierce motion and collision under the effect of helical blade 111, pulverized coal particle carries out second time and pulverizes, while pulverizing, water, gas, coal dust is separated again, in the process, the wheel 11 lifting force lifting that will be induced that pulverized coal particle gravity is less than inducer 11 lifting force moves up, the pulverized coal particle being greater than inducer 11 lifting force is deposited to normally closed type valve 2 place along L-type through hole 7, when the gravity that deposition produces is greater than the tensile force of valve 2, opening valve is discharged in " pocket " of well by the coal dust depositing to normally closed type valve 2 place, normally closed type valve 2 is closed afterwards,
S40: enter roll-type grinder 15 pulverized coal particle after water, gas and step S30 pulverize produces the effect of lifting force at inducer 9 under, roll-type grinder 15 pairs of water, gas, pulverized coal particles are separated again, and powerful smashing is carried out to pulverized coal particle, period is not deposited to normally closed type valve 2 place by the pulverized coal particle of lifting, when reaching a certain amount of, normally closed type valve 2 is opened, the discharges such as coal dust;
Water, roll-type grinder 15 is entered pulverized coal particle after gas and step S30 pulverize produces the effect of lifting force at inducer 9 under, roll-type grinder 15 rotates and produces radial centrifugal force and axial lifting force, water, gas, pulverized coal particle will be separated again, coal dust after separation is pulverized under the effect of roll-type grinder 15 edge of a knife shearing force, spiral salient 151 and mask work cylinder 10 inwall form extruding force simultaneously, pulverized coal particle is again pulverized under the effect of extruding force, because roll-type grinder 15 can grind pulverized coal particle while rotation, pulverized coal particle is pulverized again, after roll-type grinder 15 is pulverized, pulverized coal particle smashing fineness can reach below 5um, the pulverized coal particle being less than roll-type grinder 15 lifting force after pulverizing will be moved up by the lifting of roll-type grinder 15 lifting force, the pulverized coal particle being greater than roll-type grinder 15 lifting force is deposited to normally closed type valve 2 place with self gravitation along L-type through hole 7, when the gravity that deposition produces is greater than the tensile force of valve 2, opening valve is discharged in " pocket " of well by the coal dust depositing to normally closed type valve 2 place, normally closed type valve 2 is closed afterwards,
S50: the pulverized coal particle after water, gas and step S40 pulverize gives rise to screen casing 16 bottom at the lifting force that roll-type grinder 15 produces, screen casing 16 pairs of water, gas, coal dusts filter, water after filtration, gas, pulverized coal particle are discharged along screen casing 16, enter screw pump entrance, after screw pump supercharging, discharge ground; Unsanctioned pulverized coal particle drops to roll-type grinder 15 and again pulverizes under the effect of roll-type grinder 15 reverse acting spiral power, produces when described pulse shock wave is 2 open and close of normally closed type valve;
Pulverized coal particle after water, gas and step S40 pulverize gives rise to screen casing 16 bottom at the lifting force that roll-type grinder 15 produces, screen casing 16 pairs of water, gas, coal dusts filter, the pulverized coal particle being less than screen casing 16 disc type through hole 161 will be discharged with water, gas, the pulverized coal particle being greater than screen casing 16 disc type through hole 161 drops to roll-type grinder 15 and again pulverizes under the effect of roll-type grinder 15 reverse acting spiral power, can arrive by the characteristics of coal powder after screen casing 16 filters the fineness of pulverized coal making screw pump normally carry.
Under coal bed gas well provided by the invention, coal dust is separated time reducing mechanism rotates forward and pulverizes pulverized coal particle, when reversion, device is cleaned, there is good crushing effect, therefore the characteristics of coal powder remained in coal bed gas well is very little, not easily deposition or delay are in the wellbore, only need some impact forces just the pulverized coal particle after pulverizing in pit shaft can be discharged pit shaft with duct or gap, reduce the wearing and tearing of pulverized coal particle to coal bed gas extraction equipment.
It should be noted that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (9)
1. under coal bed gas well, coal dust is separated a reducing mechanism, it is characterized in that, comprising: seating nipple (8), mask work cylinder (10), axle (7), separation reducing mechanism, filter,
Described seating nipple (8) is fixedly connected with mask work cylinder (10), the top of this seating nipple (8) is provided with at least one air inlet port (12), this air inlet port (12) is higher than the least significant end of ring-type barrel (18), and this air inlet port (12) place is provided with screen cloth (13)
The bottom of described mask work cylinder (10) is fixedly connected on the top of seating nipple (8), the bottom inwall of this mask work cylinder (10) extends to form a ring-type barrel (18) downwards, this ring-type barrel (18) inserts in seating nipple (8) and forms a gap (14) with seating nipple (8) inwall
Described axle (7) is located at seating nipple (8) with in mask work cylinder (10), and in seating nipple (8) and mask work cylinder (10) radial rotating, the bottom of this axle (7) is provided with a L-type through hole (71), the arrival end (72) of this through hole (71) is lower than the bottom being separated reducing mechanism, and the bottom of this through hole (71) is provided with a normally closed type valve (2)
Described separation reducing mechanism is sheathed on axle (7), the least significant end of bottom lower than ring-type barrel (18) of this separation reducing mechanism, the arrival end (72) higher than through hole (71),
Described filter is located at the top the top being sheathed on axle (7) that are separated reducing mechanism, and the external diameter of this filter is equal with the internal diameter of mask work (10).
2. under coal bed gas well according to claim 1, coal dust is separated reducing mechanism, it is characterized in that, described filter is screen casing (16), this screen casing (16) is fixedly connected with axle (7), at least one deck disc type pore (161) is provided with vertically in described screen casing (16), the setting and disc type pore (161) staggers of each layer circle, the cross section of described pore (161) is up big and down small pyramid type.
3. under coal bed gas well according to claim 1, coal dust is separated reducing mechanism, it is characterized in that described separation reducing mechanism comprises: one-level is separated reducing mechanism, the second-order separation reducing mechanism, three grades of separation reducing mechanisms, described one-level separation reducing mechanism, the second-order separation reducing mechanism, three grades of separation reducing mechanisms are fixed on axle (7) vertically from top to bottom successively
Described one-level is separated reducing mechanism for being separated wheel (9), and the least significant end of top lower than ring-type barrel (18) of (9) is taken turns in this separation, and this separation wheel (9) is provided with at least 6 blades (91) vertically,
Described the second-order separation reducing mechanism is inducer (11), the bottom of this inducer (11) is concordant with the least significant end of ring-type barrel (18), the external diameter of this inducer (11) is less than the internal diameter of seating nipple (8), and this inducer (11) is provided with helical blade (111)
Described three grades of separation reducing mechanisms are roll-type grinder (15), the least significant end of this roll-type grinder (15) is concordant with the top of seating nipple (8), the external diameter of this roll-type grinder (15) is less than the internal diameter of mask work cylinder (10), and this roll-type grinder (15) is provided with spiral salient (151), this spiral salient (151) offers some grooves (152) vertically.
4. under coal bed gas well according to claim 3, coal dust is separated reducing mechanism, and it is characterized in that, the lifting angle of described toothed roller type grinder (15) is 0 ° ~ 30 °.
5. under coal bed gas well according to claim 4, coal dust is separated reducing mechanism, it is characterized in that, described mask work cylinder (10) is provided with the trapezoidal projection identical with toothed roller type grinder (15) rotation direction or rectangular preiection, and described spiral salient (151) matches with trapezoidal projection or rectangular preiection.
6. be separated reducing mechanism according to coal dust under the arbitrary described coal bed gas well of claim 3 ~ 5, it is characterized in that, described helical blade (111) is contrary with spiral salient 151 rotation direction.
7. under coal bed gas well according to claim 1, coal dust is separated reducing mechanism, it is characterized in that, the bottom of described axle (7) is provided with taper roll bearing (6), axle (7) is rotated in seating nipple (8) by bearing (6), described taper roll bearing (6) is arranged on seating nipple (8) inwall, and the top of this bearing (6) is lower than the arrival end (72) of through hole (71), described bearing (6) is sealed by sealing ring (4), bearing (ball) cover (5).
8. under coal bed gas well according to claim 7, coal dust is separated reducing mechanism, and it is characterized in that, the quantity of described air inlet port (12) is 2 ~ 4.
9. under coal bed gas well according to claim 1, coal dust is separated reducing mechanism, it is characterized in that, described separation wheel (9) is fixedly connected on axle (7) by flat key (17), and the quantity of this separation wheel (9) blade (91) is 6 ~ 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408937.2A CN104389560A (en) | 2014-08-19 | 2014-08-19 | Separation and crushing device of downhole pulverized coals of coalbed methane and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410408937.2A CN104389560A (en) | 2014-08-19 | 2014-08-19 | Separation and crushing device of downhole pulverized coals of coalbed methane and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104389560A true CN104389560A (en) | 2015-03-04 |
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| CN111852364A (en) * | 2020-07-29 | 2020-10-30 | 中国石油化工股份有限公司 | Cyclone separation and mechanical crushing type coal dust cleaning system and working method thereof |
| CN111905906A (en) * | 2020-07-29 | 2020-11-10 | 中国石油化工股份有限公司 | Centrifugal separation and mechanical crushing type coal dust cleaning system and working method thereof |
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Application publication date: 20150304 |