CN112761530A - Oil well acidizing unblocking acidizing tubular column device of going into well - Google Patents
Oil well acidizing unblocking acidizing tubular column device of going into well Download PDFInfo
- Publication number
- CN112761530A CN112761530A CN202110058921.3A CN202110058921A CN112761530A CN 112761530 A CN112761530 A CN 112761530A CN 202110058921 A CN202110058921 A CN 202110058921A CN 112761530 A CN112761530 A CN 112761530A
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- China
- Prior art keywords
- acidizing
- barrel
- fixedly connected
- well
- top surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 28
- 230000000694 effects Effects 0.000 claims abstract description 22
- 238000004140 cleaning Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims description 16
- 238000009423 ventilation Methods 0.000 claims description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 9
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 9
- 241001330002 Bambuseae Species 0.000 claims description 9
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 9
- 239000011425 bamboo Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 20
- 229910052742 iron Inorganic materials 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 3
- 238000013467 fragmentation Methods 0.000 abstract description 2
- 238000006062 fragmentation reaction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 239000012535 impurity Substances 0.000 description 8
- 239000003814 drug Substances 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
-
- 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
- E21B12/00—Accessories for drilling tools
-
- 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
- E21B12/00—Accessories for drilling tools
- E21B12/06—Mechanical cleaning devices
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to the technical field of oil, and discloses an oil well acidizing and deblocking acidizing tubular column well descending device which comprises a barrel, wherein the top surface of the barrel is fixedly connected with a motor frame, a motor is fixedly installed inside the motor frame, the top surface of the barrel is fixedly communicated with a sleeve, a negative pressure box is fixedly installed on the top surface of the sleeve, an output shaft of the motor is fixedly connected with a rotating shaft, the lower end of the rotating shaft penetrates through the barrel and extends into the barrel, and an installation groove is formed in the bottom surface of the barrel. This stifled acidizing tubular column device of going into well is separated in acidizing of oil well, through add the motor at the top surface of barrel for the output shaft fixed connection pivot of motor, the surface that utilizes the pivot is connected with broken blade, makes the motor drive broken blade rotation, and realizes carrying out broken separation to the iron that condenses in the oil well bottom, guarantees the iron piece fragmentation, improves negative pressure suction capacity, improves the updraught effect of iron piece, and then improves the effect of cleaning up the oil well bottom, and it is convenient to use.
Description
Technical Field
The invention relates to the technical field of oil wells, in particular to an oil well acidizing and blockage removing acidizing tubular column well descending device.
Background
The oil well is a hole drilled by a well arrangement system planned for exploiting oil according to oil field development, the oil rises to a channel of a wellhead from a well bottom, and the oil well is a hole drilled by a drilling method. After drilling oil layer, the oil well is cased, and the annular space between casing and well wall is filled with oil well cement to maintain well wall and seal oil, gas and water layer, then the oil layer is jetted by perforating gun according to the requirements of oil field development to form channel, and the oil pipe is cased, and the oil is raised from bottom of oil well to top of well by means of proper flow-inducing method, and the acidification and blockage-removing technological process is an effective measure for removing the pollution of near-well zone of oil-gas reservoir and recovering the productivity of oil-gas well. During the 'nine five' period, a series of acidizing and plug removing process technologies suitable for different oil reservoir types and different plugging characteristics of the Jidong oil field are formed through a large number of indoor experiments and field practices.
Present oil well acidizing is separated stifled acidizing tubular column and is gone into well device, in the use, owing to clear away the inside impurity of oil well mainly, but at the in-process of cleaing away, have a large amount of iron fillings on the oil well inner wall and also drop at the oil well bottom thereupon and condense into the piece for pipeline bottom physique piece is difficult to be cleared up, and common adsorption apparatus can't effectively adsorb the iron impurity that condenses when clearing up going into the well, and the clearance effect is not good in the pit.
In addition, current oil well acidizing is separated stifled acidizing tubular column and is gone into well device, in the use, because current device of going into well is normally for direct hoist and mount clear up the processing in the pit, there is the clearance in the device at the pipeline decline in-process, make the device produce when the bottom clearance rock, cause the device slope and the swing on the different degree to appear, influence the clearance and the absorption of impurity, and the collision in-process influences the stability of device inner structure, cause the damage easily, the result of use is not good.
On the other hand, in the use process of the existing oil well acidizing and blockage removing acidizing tubular column well descending device, because chemical agents for acidizing are added into the pipeline when the pipeline is acidized and blocked, the area of the inner wall of the pipeline contacting the agents is limited in the actual chemical dosing process, the amount of impurities and iron adhered to the inner wall of the pipeline is large, and only the inner part of the pipeline is cleaned, so that the impurities are still condensed at the subsequent bottom, the cleaning is not thorough, and the using effect is poor.
Disclosure of Invention
The invention provides an oil well acidizing and plug removing acidizing tubular column well descending device which has the advantages of improving the cleaning effect of condensed impurities, stabilizing a descending device and assisting in cleaning the inner wall of a pipeline and solves the problems in the background technology.
The invention provides the following technical scheme: the utility model provides an oil well acidizing is separated stifled acidizing tubular column and is gone into well device, comprises a cylindrical shel, the top surface fixedly connected with motor frame of barrel, the inside fixed mounting of motor frame has the motor, the fixed intercommunication of top surface of barrel has the sleeve pipe, sheathed tube top surface fixed mounting has the negative pressure case, the output shaft fixedly connected with pivot of motor, the lower extreme of pivot passes the barrel and extends to the inside of barrel, the mounting groove has been seted up to the bottom surface of barrel, the internal surface fixed sleeve of mounting groove has connect the magnetic sheet, the ventilation groove has been seted up to the bottom surface of magnetic sheet, the outer fixed surface of pivot is connected with broken blade.
Preferably, the inside of barrel is seted up the ventilation hole, the internal surface fixed cover in ventilation hole has connect the filter, the bottom surface in ventilation hole is linked together with the mounting groove.
Preferably, a side lever is fixedly connected to the outer surface of the rotating shaft, a sleeve plate is movably sleeved at the outer end of the side lever, a cleaning rod is fixedly connected to the outer end face of the sleeve plate, a liquid cylinder is fixedly connected to the bottom face of the cleaning rod, a sealing plug is sleeved on the top face of the liquid cylinder in a threaded manner, and a small hole is formed in the side face of the liquid cylinder.
Preferably, the end face of the side rod is provided with a sleeve hole, the inner surface of the sleeve hole is movably sleeved with the sleeve plate, the bottom surface of the side rod is provided with a threaded hole, and the inner surface of the threaded hole is sleeved with a bolt in a threaded manner.
Preferably, the fixed cover of top surface fixedly connected with of motor frame, the movable rod has been cup jointed in the internal surface activity of fixed cover, the outer terminal surface fixedly connected with mounting bracket of movable rod, the medial surface fixedly connected with circle axle of mounting bracket, the gyro wheel has been cup jointed in the surface activity of circle axle.
Preferably, the inner end face of the movable rod is fixedly connected with a movable plug, and a spring is fixedly connected between the movable plug and the fixed sleeve.
Preferably, the top surface of the fixed sleeve is fixedly communicated with a short pipe, the top surface of the short pipe is fixedly communicated with an oil sleeve, the top surface of the oil sleeve is in threaded sleeve connection with a threaded rod, the bottom end face of the threaded rod is fixedly connected with a pressing plate, and the outer surface of the pressing plate is movably sleeved with the oil sleeve.
The invention has the following beneficial effects:
1. this stifled acidizing tubular column device of going into well is separated in acidizing of oil well, through add the motor at the top surface of barrel for the output shaft fixed connection pivot of motor, the surface that utilizes the pivot is connected with broken blade, makes the motor drive broken blade rotation, and realizes carrying out broken separation to the iron that condenses in the oil well bottom, guarantees the iron piece fragmentation, improves negative pressure suction capacity, improves the updraught effect of iron piece, and then improves the effect of cleaning up the oil well bottom, and it is convenient to use.
2. This oil well acidizing unblocks acidizing tubular column device of going into well, through the fixed cover of top surface installation at the motor frame, and cup joint two sets of movable rods in the inside of fixed cover, and make the movable rod outer end add the gyro wheel, make when the below device utilize gyro wheel and pipeline internal surface contact, it is spacing to improve the device left and right sides, guarantee to transfer the device and stabilize and avoid rocking, and make the movable rod inner connect the fly leaf, utilize the spring of being connected between fly leaf and the fixed cover, through the threaded rod in the rotatory top oil jacket, make the fly leaf of the pressure oil extrusion both sides in the fixed cover of impressing, realize the removal of two sets of movable rods, realize the regulation of both sides gyro wheel interval, the effect of adaptation pipeline internal diameter is.
3. This stifled acidizing tubular column device of going into well is separated in oil well acidizing, through the lateral surface fixed connection side lever at the pivot, and the trepanning has been seted up at the terminal surface of side lever, utilize trepanning and lagging regulation, and at the outer terminal surface fixed connection clearance pole of lagging, through at the installation of clearance pole bottom surface liquid section of thick bamboo, and set up the aperture in liquid section of thick bamboo side, rotatory ejection of in-process realization medicament of clearance pole, improve pipeline surface contact medicament area, the cooperation clearance pole realizes the effective cleanness of pipeline inner wall, it is clean effectual.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a bottom view of the structure of the present invention;
FIG. 4 is a schematic cross-sectional view of a cartridge in accordance with the present invention;
FIG. 5 is an enlarged view of the structure at B in FIG. 4;
fig. 6 is a schematic cross-sectional view of the fixation sleeve of the present invention.
In the figure: 1. a barrel; 2. a motor frame; 3. a motor; 4. a sleeve; 5. a negative pressure tank; 6. a rotating shaft; 7. crushing the leaves; 8. a magnetic plate; 9. a ventilation slot; 10. a vent hole; 11. a filter plate; 12. a side lever; 13. sheathing; 14. cleaning the rod; 15. a liquid cylinder; 16. a sealing plug; 17. a small hole; 19. trepanning; 20. a threaded hole; 21. a bolt; 22. fixing a sleeve; 23. a movable rod; 24. a mounting frame; 25. a circular shaft; 26. a roller; 27. a movable plug; 28. a spring; 29. a short pipe; 30. an oil jacket; 31. pressing a plate; 32. a threaded rod; 33. and (4) mounting the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1-6, an oil well acidizing plug removal acidizing tubular column device of going into well includes barrel 1, the top surface fixedly connected with motor frame 2 of barrel 1, the inside fixed mounting of motor frame 2 has motor 3, the top surface of barrel 1 is fixed to be communicated with sleeve pipe 4, the top surface fixed mounting of sleeve pipe 4 has negative pressure tank 5, the output shaft fixedly connected with pivot 6 of motor 3, the lower extreme of pivot 6 passes barrel 1 and extends to the inside of barrel 1, mounting groove 33 has been seted up to the bottom surface of barrel 1, the internal surface fixed cover of mounting groove 33 has been connect magnetic sheet 8, ventilation slot 9 has been seted up to the bottom surface of magnetic sheet 8, the external surface fixed connection of pivot 6 has broken blade 7.
Wherein, the ventilation hole 10 has been seted up to the inside of barrel 1, and the fixed internal surface cover in ventilation hole 10 has connect filter 11, and the bottom surface in ventilation hole 10 is linked together with mounting groove 33, utilizes filter 11 to filter the impurity of updraft, avoids impurity to get into in the negative pressure case 5.
Wherein, the outer fixed surface of pivot 6 is connected with side lever 12, sleevelet 13 has been cup jointed in the outer end activity of side lever 12, outer terminal surface fixedly connected with cleaning rod 14 of sleevelet 13, the bottom surface fixedly connected with liquid section of thick bamboo 15 of cleaning rod 14, sealing plug 16 has been cup jointed to the top surface screw thread of liquid section of thick bamboo 15, aperture 17 has been seted up to the side of liquid section of thick bamboo 15, utilize the aperture 17 that liquid section of thick bamboo 15 side was seted up, make 14 rotatory in-process of cleaning rod realize throwing away of medicament, the area of contact of improvement pipeline inner wall and medicament, the cleaning effect is improved.
The end face of the side rod 12 is provided with a sleeve hole 19, the inner surface of the sleeve hole 19 is movably sleeved with the sleeve plate 13, the bottom surface of the side rod 12 is provided with a threaded hole 20, the inner surface of the threaded hole 20 is sleeved with a bolt 21 in a threaded manner, and the sleeve plate 13 is clamped and fixed by the bolt 21 sleeved in the threaded hole 20 in a threaded manner, so that the length of the cleaning rod 14 is adjusted.
Wherein, the fixed cover 22 of top surface fixedly connected with of motor frame 2, movable rod 23 has been cup jointed in the internal surface activity of fixed cover 22, the outer terminal surface fixedly connected with mounting bracket 24 of movable rod 23, the medial surface fixedly connected with circle axle 25 of mounting bracket 24, gyro wheel 26 has been cup jointed in the surface activity of circle axle 25, utilize in gyro wheel 26 and the pipeline avoid the contact, reduce the contact friction, make things convenient for the device to descend downwards, and receive the effect of both sides gyro wheel and avoid the device to rock, improve the stability of transferring.
Wherein, the inner end face of the movable rod is fixedly connected with a movable plug 27, a spring 28 is fixedly connected between the movable plug 27 and the fixed sleeve 22, and the elasticity of the spring 28 is utilized to ensure that the movable plug 27 has a resetting effect and is convenient to reset.
Wherein, the fixed intercommunication of the top surface of fixed cover 22 has the nozzle stub 29, and the fixed intercommunication of the top surface of nozzle stub 29 has oil jacket 30, and threaded rod 32 has been cup jointed to the top surface screw thread of oil jacket 30, and the bottom face fixedly connected with clamp plate 31 of threaded rod 32, and the surface of clamp plate 31 cup joints with oil jacket 30 activity, utilizes the effect of threaded rod 32 and clamp plate 31 for rotatory threaded rod 32 realizes the removal of clamp plate 31, and then realizes the promotion of pressure oil, realizes the promotion of movable rod 23.
In the working principle, the threaded rod 32 is rotated in front of the lower part, so that the threaded rod 32 drives the pressing plate 31 to rotate and move downwards, the pressure oil in the oil sleeve 30 is pressed into the fixed sleeve 22, the pressure oil extrudes the movable plugs 27 on the two sides, the two groups of movable rods 23 are simultaneously pushed towards the two sides, the rollers 26 on the two sides of the mounting frame 24 are driven to move, the bolts 21 are unscrewed, the sleeve plate 13 slides along the sleeve hole 19, the outer end of the cleaning rod 14 is extended, the liquid cylinder 15 is driven to come, the medicament is supplemented into the liquid cylinder 15, the outer ends of the cleaning rod 14 and the rollers 26 are in contact with the inner wall of the pipeline, the cleaning device is put downwards, the motor 3 is started to drive the rotating shaft 6 to rotate, the cleaning rod 14 on the outer side of the rotating shaft 6 rotates to clean the inner wall of the pipeline, the small hole 17 of the liquid cylinder 15 centrifugally ejects the medicament to the pipeline, when the bottom of the device, so that the broken iron sheet is upwards adsorbed on the magnetic plate 8 and the device is upwards pulled to complete the recovery.
Claims (7)
1. The utility model provides an oil well acidizing is separated stifled acidizing tubular column and is gone into well device, includes barrel (1), its characterized in that: the utility model discloses a motor, including barrel (1), top surface fixedly connected with motor frame (2), the inside fixed mounting of motor frame (2) has motor (3), the fixed intercommunication of top surface of barrel (1) has sleeve pipe (4), the top surface fixed mounting of sleeve pipe (4) has negative pressure tank (5), the output shaft fixedly connected with pivot (6) of motor (3), the lower extreme of pivot (6) passes barrel (1) and extends to the inside of barrel (1), mounting groove (33) have been seted up to the bottom surface of barrel (1), magnetic sheet (8) have been cup jointed to the internal surface fixed of mounting groove (33), ventilation groove (9) have been seted up to the bottom surface of magnetic sheet (8), the external surface fixed connection of pivot (6) has broken blade (7).
2. The well acidizing and unplugging acidizing string downhole device of claim 1 wherein: the inside of barrel (1) has been seted up ventilation hole (10), the internal surface fixed cup joint filter (11) of ventilation hole (10), the bottom surface and mounting groove (33) of ventilation hole (10) are linked together.
3. The well acidizing and unplugging acidizing string downhole device of claim 1 wherein: the outer fixed surface of pivot (6) is connected with side lever (12), lagging (13) have been cup jointed in the outer end activity of side lever (12), outer terminal surface fixedly connected with cleaning rod (14) of lagging (13), the bottom surface fixedly connected with liquid section of thick bamboo (15) of cleaning rod (14), sealing plug (16) have been cup jointed to the top surface screw thread of liquid section of thick bamboo (15), aperture (17) have been seted up to the side of liquid section of thick bamboo (15).
4. The well acidizing and unplugging acidizing string downhole device of claim 3 wherein: the end face of the side rod (12) is provided with a sleeve hole (19), the inner surface of the sleeve hole (19) is movably sleeved with the sleeve plate (13), the bottom surface of the side rod (12) is provided with a threaded hole (20), and the inner surface of the threaded hole (20) is sleeved with a bolt (21) in a threaded manner.
5. The well acidizing and unplugging acidizing string downhole device of claim 1 wherein: the utility model discloses a motor rack, including motor frame (2), the fixed cover of top surface fixedly connected with (22), the internal surface activity of fixed cover (22) has cup jointed movable rod (23), the outer terminal surface fixedly connected with mounting bracket (24) of movable rod (23), the medial surface fixedly connected with circle axle (25) of mounting bracket (24), gyro wheel (26) have been cup jointed in the surface activity of circle axle (25).
6. The well acidizing and unplugging acidizing string downhole device of claim 5, wherein: the inner end face of the movable rod is fixedly connected with a movable plug (27), and a spring (28) is fixedly connected between the movable plug (27) and the fixed sleeve (22).
7. The well acidizing and unplugging acidizing string downhole device of claim 5, wherein: the fixed intercommunication of top surface of fixed cover (22) has nozzle stub (29), the fixed intercommunication of top surface of nozzle stub (29) has oil jacket (30), threaded rod (32) have been cup jointed to the top surface screw thread of oil jacket (30), the bottom end face fixedly connected with clamp plate (31) of threaded rod (32), the surface and the oil jacket (30) activity of clamp plate (31) are cup jointed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058921.3A CN112761530A (en) | 2021-01-17 | 2021-01-17 | Oil well acidizing unblocking acidizing tubular column device of going into well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058921.3A CN112761530A (en) | 2021-01-17 | 2021-01-17 | Oil well acidizing unblocking acidizing tubular column device of going into well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112761530A true CN112761530A (en) | 2021-05-07 |
Family
ID=75702321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110058921.3A Withdrawn CN112761530A (en) | 2021-01-17 | 2021-01-17 | Oil well acidizing unblocking acidizing tubular column device of going into well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112761530A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115351018A (en) * | 2022-08-04 | 2022-11-18 | 芜湖中燃城市燃气发展有限公司 | Natural gas pipeline blockage clearing device and method |
-
2021
- 2021-01-17 CN CN202110058921.3A patent/CN112761530A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115351018A (en) * | 2022-08-04 | 2022-11-18 | 芜湖中燃城市燃气发展有限公司 | Natural gas pipeline blockage clearing device and method |
| CN115351018B (en) * | 2022-08-04 | 2023-06-16 | 芜湖中燃城市燃气发展有限公司 | Natural gas pipeline blockage removing device and method |
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Application publication date: 20210507 |
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| WW01 | Invention patent application withdrawn after publication |