CN111911130B - A coalbed methane opening and purification device using pulverized coal - Google Patents
A coalbed methane opening and purification device using pulverized coal Download PDFInfo
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- CN111911130B CN111911130B CN202010681093.4A CN202010681093A CN111911130B CN 111911130 B CN111911130 B CN 111911130B CN 202010681093 A CN202010681093 A CN 202010681093A CN 111911130 B CN111911130 B CN 111911130B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
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Abstract
本发明公开了一种煤层气开采用煤粉外排净化装置，本发明的出浆管的外部设置有圆周阵列的多个返流导向槽，进浆管的外部设置有圆周阵列的多个返流冲刷槽，返流冲刷槽与其上端相对应所述返流导向槽相互连通，返流冲刷槽向下正好穿过进浆孔设置，进浆管和出浆管的外部套设有所述外套管，流导向槽或返流冲刷槽与所述外套管之间构设的区域为供浆液返流下的流道，震荡与煤粉防沉剂液注入箱固定设置在外套管的外部，通过返流的方式可以很好的防止进浆孔的堵塞，保证外排的顺畅性，本发明的锥形收缩筒、锥形扩散筒的设置，可以有效的使得外排的浆液从返液孔流下，而不影响外排的浆液量以及外排压力，保证外排能力。
The invention discloses a pulverized coal discharge and purification device for coalbed methane development. The slurry outlet pipe of the invention is provided with a plurality of return flow guide grooves in a circular array, and the slurry feed pipe is provided with a plurality of return flow in a circular array outside. The backflow scouring groove is connected with the upper end corresponding to the backflow guide groove, the backflow scour groove is arranged downward just through the slurry inlet hole, and the outer parts of the slurry inlet pipe and the slurry outlet pipe are sleeved with the outer casing The area constructed between the pipe, the flow guide groove or the backflow flushing groove and the outer casing is the flow channel for the backflow of the slurry, and the vibration and pulverized coal anti-settling agent liquid injection box is fixedly arranged on the outside of the outer casing. The way of backflow can well prevent the blockage of the slurry inlet hole and ensure the smoothness of the outflow. The arrangement of the conical shrinking cylinder and the conical diffusing cylinder of the present invention can effectively make the outflowing slurry flow down from the liquid return hole. , without affecting the amount of slurry discharged and the discharge pressure to ensure the discharge capacity.
Description
Technical Field
The invention particularly relates to a coal powder discharge purification device for coal bed methane exploitation, and relates to the related field of purification devices.
Background
Coal bed gas need outwards discharge the buggy wherein at the in-process of exploitation, however, at the discharge process, if the buggy is discharged untimely, often lead to the buggy to deposit, and the buggy is in case the sediment, can lead to the buggy to deposit in outer row of section of thick bamboo or pump, leads to the jam phenomenon, and in case the jam aggravation, appears the jamming of pump very easily, leads to the damage to the pump. The problem of solving the buggy at present and deposiing generally relies on adding anti-settling agent, this kind of mode can prevent to deposit the buggy of a small amount of precipitations in the short time, however, to the pore of buggy discharge suction, because generally in order to prevent that the big bulk stone chip of mistake suction and lead to the problem of the blade damage of pump, the suction opening that sets up on the general suction tube is generally less, and these less suction openings when sucking earlier, local jam often appears easily, and then lead to arranging not smoothly outward, lead to the jam of wider scope, influence outer discharge capacity.
Disclosure of Invention
Therefore, in order to solve the defects, the invention provides a coal powder discharge purification device for coal bed methane exploitation.
The invention is realized in such a way, a coal powder discharging and purifying device for coal bed gas exploitation is constructed, which comprises a vibration and coal powder anti-settling agent liquid injection box, a slurry inlet pipe, a slurry outlet pipe, a conical shrinkage cylinder, a conical diffusion cylinder, an outer discharge pipe and an outer sleeve pipe, wherein the bottom end of the outer discharge pipe is fixedly connected with the conical diffusion cylinder integrally, the lower end of the conical diffusion cylinder is a small end, the lower end of the conical diffusion cylinder is connected to the upper end of the conical shrinkage cylinder, the upper end of the conical shrinkage cylinder is a small end, the lower end of the conical shrinkage cylinder is connected with the slurry outlet pipe, the inner diameter of the slurry outlet pipe is the same as the inner diameter of the large end of the lower end of the conical shrinkage cylinder, the outer diameter of the slurry outlet pipe is the same as the outer diameter of the large end of the lower end of the conical shrinkage cylinder, the bottom end of the slurry outlet pipe is connected with the slurry inlet pipe with the same inner diameter and outer diameter integrally, the utility model discloses a mortar outlet pipe, including grout outlet pipe, the outside of grout outlet pipe is provided with a plurality of refluence guide ways of circumference array, the outside of grout inlet pipe is provided with a plurality of refluence scouring grooves of circumference array, the refluence scouring groove is corresponding rather than the upper end the refluence guide way communicates each other, the refluence scouring groove just in time passes downwards advance the thick liquid hole setting, the outside cover of advancing thick liquid pipe and grout outlet pipe is equipped with the outer tube, the refluence guide way or the refluence scouring groove with the regional runner that supplies thick liquid to flow back down that establishes between the outer tube, it is in with the fixed setting of buggy anti-settling agent liquid injection case the outside of outer tube to vibrate.
Preferably, the tapered surface of the tapered shrinkage cylinder is provided with a plurality of liquid return holes communicated with the inner cavity of the tapered shrinkage cylinder, and the liquid return holes enable the returned liquid to flow to the return guide groove.
Preferably, a filter screen is arranged on the inner wall of the conical shrinkage cylinder and clings to the liquid return hole, so that the filtered liquid flows into the return guide groove.
Preferably, a diversion trench corresponding to the position of the backflow flushing trench or the backflow guide trench is arranged on the inner wall of the outer sleeve, and the diversion trench and the backflow flushing trench or the backflow guide trench jointly form a flow channel for the slurry to flow back.
Further, as preferred, the oscillation and coal powder anti-settling agent liquid injection box comprises a box body, a coal powder anti-settling agent liquid injection coil pipe and an oscillator, the box body is fixed outside the outer sleeve pipe, the coal powder anti-settling agent liquid injection coil pipe is arranged in the box body, a downward coal powder anti-settling agent liquid injection head is arranged on the coal powder anti-settling agent liquid injection coil pipe, and the oscillator is further arranged on the inner wall of the box body.
Further, as preferred, still include filtering mechanism, filtering mechanism includes filtering component and the feed liquor section of thick bamboo that is located the filtering component top, filtering component can filter the bold stone bits, and the inner chamber diameter that advances a liquid section of thick bamboo is greater than advance the external diameter of thick liquid pipe, the lower extreme that advances the thick liquid pipe is located advance the inner chamber of a liquid section of thick bamboo, so that the realization is right the filtering mechanism filters the suction of the thick liquid behind the bold stone bits and arranges outward.
Further, as preferred, the filtering mechanism includes the rose box, adopt the removable filter plate that is provided with of replacement mechanism in the rose box.
Further, as preferred, the replacing mechanism comprises a T-shaped partition plate, a spring, a sealing strip, a positioning mechanism, a fixing column, a convex plate, a rotating plate, a screw rod and a guide strip, the T-shaped partition plate is locked at the middle upper part of the inner side of the filter box, the filter box is fixed on the upper end surface of the screen plate, the bottom end of the inner side of the T-shaped partition plate is attached to the bottom end surface of the screen plate, the spring is fastened at the bottom of the left end surface of the inner side of the T-shaped partition plate, the sealing strip is adhered to the right end of the top end surface of the screen plate, the positioning mechanism is arranged at the right end of the inner side of the filter box, the fixing column is locked at the inner side of an opening of the bottom end surface of the T-shaped partition plate, the fixing column movably extends into the inner side of a through opening formed in.
Further, as preferred, positioning mechanism includes locating plate, constant head tank, pull rod, rotary trough and reset spring, the locating plate front end face bottom rotates through pivot and rose box inboard front end middle upper portion to be connected, and the locating plate activity stretches into the constant head tank inboard that the bottom end face right-hand member was seted up in the sieve plate, the pull rod runs through in rose box right-hand member face middle upper portion, and pull rod outside right-hand member articulates in the rotary trough inboard, the rotary trough is seted up in locating plate right-hand member face middle part, reset spring both ends are fixed connection respectively in locating plate right-hand member face middle part and rose box inboard right-hand member face middle upper portion, and reset spring medial surface and pull rod side surface swing joint.
Further, preferably, the filter mechanism is located at the bottom of the production well.
The invention has the following advantages: the invention provides a coal powder discharge purification device for coal bed methane exploitation by improvement, compared with the same type of equipment, the coal powder discharge purification device has the following improvements:
the invention relates to a coal powder discharge purification device for coal bed methane production,
the invention is characterized in that a plurality of backflow guide grooves in a circumferential array are arranged outside the slurry outlet pipe, a plurality of backflow scouring grooves in a circumferential array are arranged outside the slurry inlet pipe, the backflow scouring grooves are mutually communicated with the backflow guide grooves corresponding to the upper ends of the backflow scouring grooves, the backflow scouring grooves are arranged downwards and just penetrate through the slurry inlet hole, the outer sleeves are sleeved outside the slurry inlet pipe and the slurry outlet pipe, the backflow guide grooves or the area formed between the backflow scouring grooves and the outer sleeves is a flow channel for slurry backflow, the oscillation and coal powder anti-settling agent liquid injection box is fixedly arranged outside the outer sleeves, the slurry inlet hole can be well prevented from being blocked in a backflow mode, the smoothness of the external discharge is ensured, meanwhile, the arrangement of the conical shrinkage barrel and the conical diffusion barrel can effectively enable the external slurry to flow down from the backflow hole without influencing the amount and the external discharge pressure of the slurry, ensuring the discharge capacity.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic elevation sectional view of the filter mechanism of the present invention;
FIG. 3 is a front cross-sectional view of the exchange mechanism of the present invention;
FIG. 4 is a schematic view of a screen panel configuration of the present invention;
fig. 5 is an enlarged view of the structure at a in fig. 3 according to the present invention.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 5, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a coal-bed gas mining coal powder discharge purification device by improvement, which comprises a vibration and coal powder anti-settling agent liquid injection box 1, a slurry inlet pipe 4, a slurry outlet pipe 15, a conical shrinkage cylinder 12, a conical diffusion cylinder 11, a discharge pipe 10 and an outer sleeve 16, wherein the bottom end of the outer sleeve is integrally and fixedly connected with the conical diffusion cylinder 11, the lower end of the conical diffusion cylinder is a small end, the lower end of the conical diffusion cylinder is connected to the upper end of the conical shrinkage cylinder 12, the upper end of the conical shrinkage cylinder is a small end, the lower end of the conical shrinkage cylinder is connected with the slurry outlet pipe 15, the inner diameter of the slurry outlet pipe is the same as the inner diameter of the large end of the lower end of the conical shrinkage cylinder, the outer diameter of the slurry outlet pipe is the same as the outer diameter of the large end of the lower end of the conical shrinkage cylinder, the bottom end of the slurry outlet pipe is integrally connected with the slurry inlet pipe 4 with the same inner diameter, the utility model discloses a mortar grouting machine, including the grout inlet pipe, the bottom of advance thick liquid pipe is provided with a plurality of thick liquid holes 5, the outside of play thick liquid pipe is provided with a plurality of refluence guide ways 14 of circumference array, the outside of advancing the thick liquid pipe is provided with a plurality of refluence scouring grooves 17 of circumference array, the refluence scouring groove is corresponding rather than the upper end the refluence guide way communicates each other, the refluence scouring groove just passes downwards advance thick liquid hole 5 sets up, the outside cover of advancing thick liquid pipe 4 and play thick liquid pipe 15 is equipped with outer tube 16, refluence guide way 14 or refluence scouring groove 17 with the regional runner that sets up down for supplying thick liquid refluence between the outer tube, it is in with the fixed setting of buggy anti-settling agent liquid injection case 1 the outside of outer tube 16 to vibrate.
The conical surface of the conical contraction cylinder 12 is provided with a plurality of liquid return holes 13 communicated with the inner cavity of the conical contraction cylinder, and the liquid return holes enable the liquid which flows back to flow into the return guide groove 14.
And a filter screen is arranged on the inner wall of the conical contraction cylinder and clings to the liquid return hole, so that the filtered liquid flows into the return guide groove.
A diversion trench corresponding to the position of the backflow flushing trench 17 or the backflow guide trench 14 is arranged on the inner wall of the outer sleeve 16, and the diversion trench and the backflow flushing trench 17 or the backflow guide trench 14 together form a flow channel for the slurry to flow back.
The shock and coal powder anti-settling agent liquid injection box 1 comprises a box body, a coal powder anti-settling agent liquid injection coil and an oscillator, wherein the box body is fixed outside the outer sleeve, the coal powder anti-settling agent liquid injection coil is arranged in the box body, a downward coal powder anti-settling agent liquid injection head is arranged on the coal powder anti-settling agent liquid injection coil, and the oscillator is further arranged on the inner wall of the box body.
As another better embodiment, still include filtering mechanism, filtering mechanism includes filter assembly and the feed liquor section of thick bamboo 3 that is located the filter assembly top, filter assembly can filter the bold stone bits, and the inner chamber diameter of advancing a liquid section of thick bamboo is greater than advance the external diameter of thick liquid pipe, the lower extreme that advances the thick liquid pipe is located advance the inner chamber of a liquid section of thick bamboo, so that the realization is right the filtering mechanism filters the suction of the thick liquid behind the bold stone bits and is arranged outward.
The filtering mechanism comprises a filtering box 2, and a filtering screen plate 8 is arranged in the filtering box in a replaceable manner by adopting a replacing mechanism 7.
The replacing mechanism 7 comprises a T-shaped partition plate 71, a spring 72, a sealing strip 73, a positioning mechanism 74, a fixing column 75, a convex plate 76, a rotating plate 77, a screw 78 and a guide strip 79, the T-shaped partition plate 71 is locked at the middle-upper part of the inner side of the filter box 2, the filter screen plate is fixed on the upper end surface of the screen plate, the bottom end of the inner side of the T-shaped partition plate 71 is attached to the bottom end surface of the screen plate 6, the spring 72 is fastened at the bottom of the left end surface of the inner side of the T-shaped partition plate 71, the sealing strip 73 is adhered at the right end of the top end surface of the screen plate 6, the positioning mechanism 74 is arranged at the right end of the inner side of the filter box, the fixing column 75 is fixedly locked at the inner side of the opening at the bottom end face of the T-shaped partition plate 71, the fixed column 75 movably extends into the inner side of the through opening formed at the top of the front end of the convex plate 76, the rotating plate 77 is hinged at the bottom of the convex plate 76, the left end of the screw rod 78 is rotatably connected with the right end face of the rotating plate 77, and the guide strip 79 is arranged on the outer side of the screen plate 6.
The filter mechanism is located at the bottom of the production well.
The invention is characterized in that a plurality of backflow guide grooves in a circumferential array are arranged outside the slurry outlet pipe, a plurality of backflow scouring grooves in a circumferential array are arranged outside the slurry inlet pipe, the backflow scouring grooves are mutually communicated with the backflow guide grooves corresponding to the upper ends of the backflow scouring grooves, the backflow scouring grooves are arranged downwards and just penetrate through the slurry inlet hole, the outer sleeves are sleeved outside the slurry inlet pipe and the slurry outlet pipe, the backflow guide grooves or the area formed between the backflow scouring grooves and the outer sleeves is a flow channel for slurry backflow, the oscillation and coal powder anti-settling agent liquid injection box is fixedly arranged outside the outer sleeves, the slurry inlet hole can be well prevented from being blocked in a backflow mode, the smoothness of the external discharge is ensured, meanwhile, the arrangement of the conical shrinkage barrel and the conical diffusion barrel can effectively enable the external slurry to flow down from the backflow hole without influencing the amount and the external discharge pressure of the slurry, ensuring the discharge capacity.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described, and the standard parts used in the present invention are all available on the market, the special-shaped parts can be customized according to the description and the accompanying drawings, the specific connection mode of each part adopts the conventional means of bolt and rivet, welding and the like mature in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A coal-bed gas is opened and is adopted buggy and arrange purifier outward, it includes shaking and buggy anti-settling agent liquid injection case (1), advance thick liquid pipe (4), go out thick liquid pipe (15), toper shrink section of thick bamboo (12), toper diffuser (11), outer discharge pipe (10) and outer tube (16), wherein, the bottom of outer discharge pipe is integrative fixedly connected with toper diffuser (11), the lower extreme of toper diffuser is the tip, and the lower extreme of toper diffuser is connected to the upper end of toper shrink section of thick bamboo (12), the upper end of toper shrink section of thick bamboo is the tip, the lower extreme of toper shrink section of thick bamboo is connected with go out thick liquid pipe (15), the internal diameter of play thick liquid pipe is the same with the main aspects internal diameter of the lower extreme of toper shrink section of thick bamboo, the external diameter of play thick liquid pipe is the same with the main aspects external diameter of the lower extreme of toper shrink section of thick bamboo, the bottom of play thick liquid pipe is integrative connected with advance thick liquid pipe (4) the same with, the utility model discloses a mortar grouting machine, including outer tube (16), it is provided with a plurality of thick liquid holes (5) to advance the bottom of thick liquid pipe, the outside of play thick liquid pipe is provided with a plurality of refluence guide ways (14) of circumference array, the outside of advancing the thick liquid pipe is provided with a plurality of refluence scouring grooves (17) of circumference array, refluence scouring groove is corresponding rather than the upper end the refluence guide way communicates each other, the refluence scouring groove just passes downwards advance thick liquid hole (5) setting, the outside cover of advancing thick liquid pipe (4) and play thick liquid pipe (15) is equipped with outer tube (16), refluence guide way (14) or refluence scouring groove (17) with the regional runner that sets up down for supplying thick liquid refluence between the outer tube, vibrate and the fixed setting of buggy anti-settling agent liquid injection case (1) the outside of outer tube (16).
2. The coal-bed gas exploitation coal dust discharge purification device according to claim 1, characterized in that: the conical surface of the conical contraction cylinder (12) is provided with a plurality of liquid return holes (13) communicated with the inner cavity of the conical contraction cylinder, and the liquid return holes enable the liquid which flows back to flow to the backflow guide groove (14).
3. The coal-bed gas exploitation coal dust discharge purification device according to claim 2, characterized in that: and a filter screen is arranged on the inner wall of the conical contraction cylinder and clings to the liquid return hole, so that the filtered liquid flows into the return guide groove.
4. The coal-bed gas exploitation coal dust discharge purification device according to claim 1, characterized in that: and a diversion trench corresponding to the position of the backflow flushing trench (17) or the backflow guide trench (14) is arranged on the inner wall of the outer sleeve (16), and the diversion trench and the backflow flushing trench (17) or the backflow guide trench (14) jointly form a flow channel under the backflow of the slurry.
5. The coal-bed gas exploitation coal dust discharge purification device according to claim 1, characterized in that: shock and buggy prevent sinking agent liquid injection case (1) includes box, buggy prevent sinking agent liquid injection coil and oscillator, the box is fixed the outside of outer tube, be provided with in the box buggy prevent sinking agent liquid injection coil, be provided with buggy prevent sinking agent liquid injection head down on the buggy prevent sinking agent liquid injection coil, still be provided with on the inner wall of box the oscillator.
6. The coal dust discharge purification device for coal bed methane exploitation according to any one of claims 1 to 5, characterized in that: still include filtering mechanism, filtering mechanism includes filter assembly and the liquid section of thick bamboo (3) of advancing that is located the filter assembly top, filter assembly can filter the bold stone bits, and the inner chamber diameter that advances the liquid section of thick bamboo is greater than advance the external diameter of thick liquid pipe, the lower extreme that advances the thick liquid pipe is located advance the inner chamber of liquid section of thick bamboo, so that the realization is right the filtering mechanism filters the suction of the thick liquid after the bold stone bits and arranges outward.
7. The coal-bed gas exploitation coal dust discharge purification device according to claim 6, characterized in that: the filtering mechanism comprises a filtering box (2), and a filtering screen plate (8) is arranged in the filtering box in a replaceable manner by adopting a replacing mechanism (7).
8. The coal-bed gas exploitation coal dust discharge purification device according to claim 7, characterized in that: the replacing mechanism (7) comprises a T-shaped partition plate (71), a spring (72), a sealing strip (73), a positioning mechanism (74), a fixed column (75), a convex plate (76), a rotating plate (77), a screw rod (78) and a guide strip (79), the T-shaped partition plate (71) is locked at the middle upper part of the inner side of the filter box (2), the filter screen plate is fixed on the upper end surface of the screen plate, the bottom end of the inner side of the T-shaped partition plate (71) is attached to the bottom end surface of the screen plate (6), the spring (72) is fastened at the bottom of the left end surface of the inner side of the T-shaped partition plate (71), the sealing strip (73) is attached at the right end of the top end surface of the screen plate (6), the positioning mechanism (74) is arranged at the right end of the inner side of the filter box, the fixed column (75) is locked at the inner side of the opening of the bottom end surface of the T-, the rotating plate (77) is hinged to the bottom of the convex plate (76), the left end of the screw rod (78) is rotatably connected with the right end face of the rotating plate (77), and the guide strip (79) is arranged on the outer side of the screen plate (6).
9. The coal-bed gas exploitation coal dust discharge purification device according to claim 8, characterized in that: positioning mechanism (74) includes locating plate (741), constant head tank (742), pull rod (743), rotary slot (744) and reset spring (745), locating plate (741) front end face bottom is connected through pivot and filter box inboard front end middle and upper portion rotation, and locating plate (741) activity stretches into in constant head tank (742) inboard that sieve plate (6) bottom end face right-hand member was seted up, pull rod (743) run through in upper portion in filter box (2) right-hand member face, and pull rod (743) outside right-hand member articulates in rotary slot (744) inboard, rotary slot (744) is seted up in locating plate (741) right-hand member face middle part, reset spring (745) both ends are fixed connection respectively in locating plate (741) right-hand member face middle part and filter box inboard right-hand member face middle and upper portion, and reset spring (745) medial surface and pull rod (743) side surface swing joint.
10. The coal-bed gas exploitation coal dust discharge purification device according to claim 8, characterized in that: the filter mechanism is located at the bottom of the production well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681093.4A CN111911130B (en) | 2020-07-15 | 2020-07-15 | A coalbed methane opening and purification device using pulverized coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010681093.4A CN111911130B (en) | 2020-07-15 | 2020-07-15 | A coalbed methane opening and purification device using pulverized coal |
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| CN111911130A CN111911130A (en) | 2020-11-10 |
| CN111911130B true CN111911130B (en) | 2021-05-28 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7048045B2 (en) * | 2004-01-21 | 2006-05-23 | Petro-Canada | Gas lift apparatus for a well |
| CN110681224A (en) * | 2019-11-08 | 2020-01-14 | 河南理工大学 | A pulverized coal filtering and collecting device for coalbed methane exploitation |
| CN111155968A (en) * | 2020-01-22 | 2020-05-15 | 中海油能源发展股份有限公司 | A self-excited oscillation filter pulverized coal system for coalbed methane exploitation |
-
2020
- 2020-07-15 CN CN202010681093.4A patent/CN111911130B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7048045B2 (en) * | 2004-01-21 | 2006-05-23 | Petro-Canada | Gas lift apparatus for a well |
| CN110681224A (en) * | 2019-11-08 | 2020-01-14 | 河南理工大学 | A pulverized coal filtering and collecting device for coalbed methane exploitation |
| CN111155968A (en) * | 2020-01-22 | 2020-05-15 | 中海油能源发展股份有限公司 | A self-excited oscillation filter pulverized coal system for coalbed methane exploitation |
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| CN111911130A (en) | 2020-11-10 |
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