CN112361113A - Under-pressure plugging method for petroleum and natural gas pipeline - Google Patents
Under-pressure plugging method for petroleum and natural gas pipeline Download PDFInfo
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- CN112361113A CN112361113A CN202011361029.4A CN202011361029A CN112361113A CN 112361113 A CN112361113 A CN 112361113A CN 202011361029 A CN202011361029 A CN 202011361029A CN 112361113 A CN112361113 A CN 112361113A
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- fixedly connected
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- leather
- pipeline
- plugging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
- F16L55/124—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced radially into the pipe or hose
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
- F16L55/128—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose
- F16L55/132—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing
- F16L55/134—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing by means of an inflatable packing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to the technical field of petroleum and natural gas pipeline treatment, and discloses a petroleum and natural gas pipeline blocking method under pressure, which comprises a short pipeline, wherein a tee joint is welded on the outer surface of the short pipeline, a gas release valve is fixedly connected to one side of the top end of the short pipeline, a hole is formed in the top end of the tee joint and is in threaded connection with one end of a double-headed screw through the hole, the other end of the double-headed screw is in threaded connection with a sandwich valve, a push-pull rod is movably sleeved on one side of the sandwich valve, the top end of the sandwich valve is movably connected with a blocking machine column, and a hydraulic motor is fixedly connected to the. This plugging device is pressed in oil and gas pipeline area through devices such as first electro-magnet, little spring, second electro-magnet, can make leather collar shrink and expansion, can enough make the shutoff effect of short pipeline better, still is favorable to protecting the surface of leather collar not damaged because of the friction, has reduced the replacement number of times of leather collar to the effectual degree of difficulty and the cost of having weakened the construction.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas pipeline treatment, in particular to a method for plugging a petroleum and natural gas pipeline under pressure.
Background
The technology for blocking the holes on the petroleum and natural gas pipeline under pressure is a safe, economic and efficient technology for repairing and rush-repairing the pipeline in service, and is suitable for normal repair and reconstruction of the pipeline and rush-repairing of normal conveying accidents which suddenly affect the pipeline.
However, the blocking device with pressure has some defects in the use process: firstly, when a leather ring in the under-pressure plugging device contacts the inner wall of the pipeline to move, the leather ring rubs against the inner wall, and due to the fact that different corrosion conditions occur in the pipeline due to long-term use of the petroleum and natural gas pipeline, the inner wall is uneven, the surface of a leather cup is easy to damage, the plugging effect is poor, and the construction cost and time are increased; secondly, in the process of pipeline maintenance, before the damaged pipeline is disassembled, the gas in the pipeline needs to be emptied, and the operation causes environmental pollution and resource waste.
Disclosure of Invention
The invention provides a pressurized plugging device and a plugging method for an oil and gas pipeline, which have the advantages of improving the plugging degree of the pipeline, realizing tight plugging, saving energy and protecting environment, and solve the problems of poor air isolation and air break effect caused by friction and damage of a leather ring and environmental pollution and resource waste caused by emptying of natural gas.
The invention provides the following technical scheme: an oil and gas pipeline under-pressure plugging device comprises a short pipeline, wherein a tee joint is welded on the outer surface of the short pipeline, a gas release valve is fixedly connected to one side of the top end of the short pipeline, a hole is formed in the top end of the tee joint and is in threaded connection with one end of a double-headed screw through the hole, the other end of the double-headed screw is in threaded connection with a sandwich valve, a push-pull rod is movably sleeved on one side of the sandwich valve, the top end of the sandwich valve is movably connected with a plugging machine column, a hydraulic motor is fixedly connected to the top end of the plugging machine column, a controller is fixedly connected to the upper end inside the hydraulic motor, a movable column is movably sleeved at the lower end of the hydraulic motor, a fixed seat is fixedly connected to the bottom end of the fixed seat, a fixed plate is fixedly connected to the bottom end of the fixed plate, the middle part of one side and the middle part of the upper end of the movable screw are respectively and fixedly connected with a fixing buckle, the bottom end of the movable plate is fixedly connected with the supporting plate, the bottom end of the supporting plate is fixedly connected with the leather ring, the top end inside the leather ring is fixedly connected with a driving motor, the bottom end of the driving motor is fixedly connected with the conduction rod, four sides of the upper end of the conduction rod are respectively and fixedly connected with a positive terminal and a negative terminal, the upper end of the positive terminal is fixedly connected with a negative terminal, the inner side of the leather ring is movably sleeved with a leather bag, one end of the positive terminal and one end of the negative terminal are fixedly connected with the inner surface of the leather bag, the outer surface of the leather bag is fixedly connected with the first electromagnet, one side of the first electromagnet is fixedly connected with one end of the small spring, the other end of the small spring is fixedly connected with the second electromagnet, and the bottom end of the leather collar is fixedly connected with the baffle.
Preferably, one end of the conduction rod is fixedly connected with a large spring, one end of the large spring is fixedly connected with the gas absorber, the two sides of the gas absorber are fixedly connected with the air pressure detector, one side of the leather bag is provided with a hole, the leather bag is fixedly sleeved with the gas absorber through the hole, and the outer surface of the leather bag is in contact with the baffle.
Preferably, the radius of the pipeline with the shorter radius is less than 5 cm when the leather collar is not used for plugging, and the radius of the pipeline with the shorter radius is greater than 10 cm when the leather collar is not used for plugging.
Preferably, the second electromagnet has N-type magnetism, the positions of the positive terminal and the negative terminal fixedly connected with the inner surface of the leather bag correspond to the positions of the outer surface of the leather bag fixedly connected with the first electromagnet, and the number of the positive terminal, the negative terminal, the first electromagnet, the small spring and the second electromagnet is four and is uniformly distributed.
Preferably, one end of the small spring is fixedly connected with the first electromagnet, the other end of the small spring is fixedly connected with the second electromagnet, the length of the small spring is 5 cm, and the elasticity of the small spring is large.
Preferably, the leather ring is filled with nitrogen.
A plugging method of a petroleum and natural gas pipeline under-pressure plugging device comprises the following steps: the first step, the plugging machine column is arranged at the top end of a sandwich valve, a push-pull rod is pulled leftwards to open the sandwich valve, a switch of a controller is opened, and the movable column moves downwards through a hydraulic motor and passes through a channel of the sandwich valve and a tee joint until the movable column reaches a short pipeline; secondly, when the bottom end of the fixed plate is in contact with the inner bottom end of the short pipeline, the movable plate reaches a specified position, the driving motor is started at the moment, so that the positive terminal and the negative terminal generate forward current, then the first electromagnet is provided with N-type magnetism, and the second electromagnet is provided with N-type magnetism which is mutually repelled, so that the leather ring is propped open by the second electromagnet; thirdly, after the leather collar is stretched, the gas absorber starts to absorb the right gas of the short pipeline to stretch the leather bag, so that the leather collar is extruded to be closer to the inner wall of the short pipeline, and the gas pressure detector stops absorbing after detecting that the gas pressure in the leather bag reaches a certain value to finish plugging; fourthly, after the pipeline is replaced, the gas absorber starts to release gas, and when the gas pressure detector detects that no gas exists in the leather bag, the gas absorber stops working; fifthly, after the gas absorber stops working, the driving motor starts to move in a reverse direction, so that the positive terminal and the negative terminal have reverse currents, the first electromagnet is S-shaped, and the second electromagnet starts to contract, so that the leather ring is restored to the original state; and sixthly, after the shrinkage is finished, the hydraulic motor starts to drive the movable column to move upwards, so that the fixed plate reaches the inner part of the plugging machine column, and then the push-pull rod is pushed rightwards, so that the sandwich valve is closed.
The invention has the following beneficial effects:
1. this plugging device is pressed in oil and gas pipeline area, through driving motor and just, the magnetism that the negative terminal changed first electro-magnet makes the second electro-magnet remove, thereby make the apron can be by shrink and inflation, first electro-magnet and second electro-magnet pass through little spring coupling simultaneously, can effectively alleviate because of the too big extrusion force in the twinkling of an eye to the apron internal surface of repulsion between first electro-magnet and the second electro-magnet, the effect that has buffer protection, compare in prior art, parts such as second electro-magnet can the apron change state, can enough improve the shutoff effect of short pipeline with the apron inflation, can also solve the surface of apron and transport the damaged problem of in-process because of the short pipeline of friction with the apron shrink, the replacement number of times of apron has been reduced, thereby the effectual degree of difficulty and the cost of weakening the construction.
2. This plugging device is pressed in oil and gas pipeline area, natural gas absorption in the short pipeline through the gas absorber leaves in the leather bag, make the leather bag inflation, thereby drive the inside nitrogen gas of leather bag extrusion leather bag, the leather bag obtains further inflation, can be abundant say the inner wall contact with short pipeline, make the leather bag to the shutoff effect of short pipeline more, after the shutoff ends simultaneously, the natural gas of storage is released again through the gas absorber, thereby make the natural gas put into production again, compare with prior art, carry out used repeatedly with the natural gas that should originally discharge in the nature, the effectual energy of having practiced thrift, the environment has been protected.
Drawings
FIG. 1 is a schematic structural view of the present invention in an unplugged state;
FIG. 2 is a schematic diagram of the structure at A in FIG. 1 according to the present invention;
FIG. 3 is a schematic structural view of the plugging state of the present invention;
FIG. 4 is a schematic diagram of the structure of FIG. 3 at B in accordance with the present invention;
fig. 5 is a schematic cross-sectional view of the apron of the present invention.
In the figure: 1. a short pipe; 2. a tee joint; 3. a deflation valve; 4. a double-headed screw; 5. a sandwich valve; 6. a push-pull rod; 7. plugging the machine column; 8. a hydraulic motor; 9. a controller; 10. a movable post; 11. a fixed seat; 12. a fixing plate; 13. a movable screw; 14. a movable plate; 15. a fixing buckle; 16. a support plate; 17. a leather collar; 18. a skin pocket; 19. a drive motor; 20. a conductive rod; 21. a large spring; 22. a gas absorber; 23. an air pressure detector; 24. a positive terminal; 25. a negative terminal; 26. a first electromagnet; 27. a small spring; 28. a second electromagnet; 29. and a baffle plate.
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. 1-5, an oil and gas pipeline blocking device with pressure comprises a short pipeline 1, a tee joint 2 welded on the outer surface of the short pipeline 1, a vent valve 3 fixedly connected to one side of the top end of the short pipeline 1, a hole formed in the top end of the tee joint 2 and in threaded connection with one end of a double-headed screw 4 through the hole, a pinch valve 5 in threaded connection with the other end of the double-headed screw 4, a push-pull rod 6 movably sleeved on one side of the pinch valve 5, a blocking machine column 7 movably connected with the top end of the pinch valve 5, a hydraulic motor 8 fixedly connected to the top end of the blocking machine column 7, a controller 9 fixedly connected to the inner upper end of the hydraulic motor 8, a movable column 10 movably sleeved on the lower end of the hydraulic motor 8, a fixed seat 11 fixedly connected to the bottom end of the movable column 10, a fixed plate 12 fixedly connected to, the movable screw 13 is movably connected with one end of the movable plate 14, the middle part of one side and the middle part of the upper end of the movable screw 13 are respectively and fixedly connected with a fixing buckle 15, the bottom end of the movable plate 14 is fixedly connected with a supporting plate 16, the bottom end of the supporting plate 16 is fixedly connected with a leather collar 17, the top end inside the leather collar 17 is fixedly connected with a driving motor 19, the bottom end of the driving motor 19 is fixedly connected with a conducting rod 20, four sides of the upper end of the conducting rod 20 are respectively and fixedly connected with a positive terminal 24 and a negative terminal 25, the upper end of the positive terminal 24 is fixedly connected with a negative terminal 25, the leather collar 17 is movably sleeved with a leather bag 18, one ends of the positive terminal 24 and the negative terminal 25 are fixedly connected with the inner surface of the leather bag 18, the outer surface of the leather bag 18 is fixedly connected with a first electromagnet 26, one side of the first electromagnet 26 is fixedly connected with one end of, the bottom end of the apron 17 is fixedly connected with a baffle 29.
Furthermore, one end of the conducting rod 20 is fixedly connected with a large spring 21, one end of the large spring 21 is fixedly connected with a gas absorber 22, two sides of the gas absorber 22 are fixedly connected with a gas pressure detector 23, one side of the leather bag 18 is provided with a hole, the hole is fixedly sleeved with the gas absorber 22, and the outer surface of the leather bag 18 is in contact with a baffle 29.
Furthermore, the radius of the short pipeline 1 is 5 cm smaller when the leather collar 17 does not perform plugging work, and the radius of the short pipeline 1 is 10 cm larger than that of the leather bag 18 when the leather collar 17 does not perform plugging work, so that the surface damage of the leather collar 17 caused by the friction between the leather collar 17 and the inner wall of the short pipeline 1 in the movement process is prevented, and the plugging effect is poor.
Furthermore, the second electromagnet 28 has N-type magnetism, the positions of the positive terminal 24 and the negative terminal 25 fixedly connected with the inner surface of the leather bag 18 correspond to the positions of the outer surface of the leather bag 18 fixedly connected with the first electromagnet 26, the number of the positive terminal 24, the negative terminal 25, the first electromagnet 26, the small spring 27 and the second electromagnet 28 is four, and the four electromagnets are uniformly distributed, so that the first electromagnet 26 can accurately receive the electromagnetic force generated by the positive terminal 24 and the negative terminal 25, and the leather collar 17 is expanded and contracted through the second electromagnet 28, and the blocking effect is better.
Furthermore, one end of the small spring 27 is fixedly connected with the first electromagnet 26, the other end of the small spring 27 is fixedly connected with the second electromagnet 28, the length of the small spring 27 is 5 cm, the small spring 27 is large in elasticity and has a buffering effect, and the leather collar 17 can be prevented from being damaged due to overlarge magnetic force when the second electromagnet 28 expands outwards.
Furthermore, the leather collar 17 is filled with nitrogen, and the nitrogen is inert gas, so that the reaction is not easy to occur, and gases such as natural gas in the leather bag 18 can be effectively protected, and the explosion is avoided.
A plugging method of a petroleum and natural gas pipeline under-pressure plugging device comprises the following steps: firstly, installing a plugging machine column 7 at the top end of a sandwich valve 5, pulling a push-pull rod 6 leftwards to open the sandwich valve 5, opening a switch of a controller 9, and enabling a movable column 10 to move downwards through a hydraulic motor 8 and pass through the sandwich valve 5 and a channel of a tee joint 2 until the movable column reaches a short pipeline 1; secondly, when the bottom end of the fixed plate 12 contacts the inner bottom end of the short pipe 1, it indicates that the movable plate 14 reaches a specified position, and at this time, the driving motor 19 is started, so that the positive terminal 24 and the negative terminal 25 generate a positive current, and then the first electromagnet 26 is provided with N-type magnetism, and the second electromagnet 28 is provided with N-type magnetism, and the two are in repulsion, so that the apron 17 is opened by the second electromagnet 28; thirdly, after the leather collar 17 is stretched, the gas absorber 22 starts to absorb the gas on the right side of the short pipeline 1 to ensure that the leather bag 18 is stretched, so that the leather collar 17 is extruded to be closer to the inner wall of the short pipeline 1, and the gas pressure detector 23 stops absorbing after detecting that the gas pressure in the leather bag 18 reaches a certain value to finish plugging; fourthly, after the pipeline is replaced, the gas absorber 22 starts to release gas, and when the gas pressure detector 23 detects that no gas exists in the leather bag 18, the gas absorber 22 stops working; fifthly, after the gas absorber 22 stops working, the driving motor 19 starts to move in reverse direction, so that the positive terminal 24 and the negative terminal 25 have reverse current, the first electromagnet 26 has an S shape, and the second electromagnet 28 starts to contract, so that the leather collar 17 returns to the original state; and sixthly, after the contraction is finished, the hydraulic motor 8 starts to drive the movable column 10 to move upwards, so that the fixed plate 12 reaches the inner part of the plugging machine column 7, and then the push-pull rod 6 is pushed rightwards, so that the sandwich valve 5 is closed.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a plugging method of plugging device is pressed in oil and gas pipeline area, includes short pipeline (1), the outer skin weld of short pipeline (1) has tee bend (2), top one side fixedly connected with bleed valve (3) of short pipeline (1), the top of tee bend (2) is seted up porosely, and the one end threaded connection of clearing hole and double-end screw (4), the double-end screw (4) other end and sandwich valve (5) threaded connection, push-and-pull rod (6), its characterized in that have been cup jointed in the activity of one side of sandwich valve (5): the top end of the sandwich valve (5) is movably connected with the plugging machine column (7), the top end of the plugging machine column (7) is fixedly connected with a hydraulic motor (8), the upper end inside the hydraulic motor (8) is fixedly connected with a controller (9), the lower end of the hydraulic motor (8) is movably sleeved with a movable column (10), the bottom end of the movable column (10) is fixedly connected with a fixed seat (11), the bottom end of the fixed seat (11) is fixedly connected with a fixed plate (12), one side of the upper end of the fixed plate (12) is movably connected with a movable screw (13), the movable screw (13) is movably connected with one end of a movable plate (14), the middle part of one side and the middle part of the upper end of the movable screw (13) are respectively and fixedly connected with a fixed buckle (15), the bottom end of the movable plate (14) is fixedly connected with a supporting plate (16), and the bottom end of the supporting plate (16, the top end of the inner part of the leather ring (17) is fixedly connected with a driving motor (19), the bottom end of the driving motor (19) is fixedly connected with a conduction rod (20), four sides of the upper end of the conduction rod (20) are respectively and fixedly connected with a positive terminal (24) and a negative terminal (25), the upper end of the positive terminal (24) is fixedly connected with a negative terminal (25), the inner side of the leather collar (17) is movably sleeved with a leather bag (18), one end of the positive terminal (24) and one end of the negative terminal (25) are fixedly connected with the inner surface of the leather bag (18), the outer surface of the leather bag (18) is fixedly connected with a first electromagnet (26), one side of the first electromagnet (26) is fixedly connected with one end of a small spring (27), the other end of the small spring (27) is fixedly connected with a second electromagnet (28), and the bottom end of the apron (17) is fixedly connected with a baffle (29);
the plugging method comprises the following steps:
firstly, installing a plugging machine column (7) at the top end of a sandwich valve (5), pulling a push-pull rod (6) leftwards to open the sandwich valve (5), opening a switch of a controller (9), and enabling a movable column (10) to move downwards through a hydraulic motor (8) and pass through the sandwich valve (5) and a channel of a tee joint (2) until the movable column reaches a short pipeline (1);
secondly, when the bottom end of the fixed plate (12) contacts the inner bottom end of the short pipeline (1), the movable plate (14) reaches a specified position, at the moment, the driving motor (19) is started, so that the positive terminal (24) and the negative terminal (25) generate positive current, then the first electromagnet (26) is provided with N-type magnetism, and the second electromagnet (28) is provided with N-type magnetism and the two are mutually repelled, so that the leather ring (17) is propped open by the second electromagnet (28);
thirdly, after the leather ring (17) is stretched, the gas absorber (22) starts to absorb the right gas of the short pipeline (1) to stretch the leather bag (18), so that the leather ring (17) is extruded to be closer to the inner wall of the short pipeline (1), and the gas pressure detector (23) stops absorbing after detecting that the gas pressure in the leather bag (18) reaches a certain value, so that plugging is completed;
fourthly, after the pipeline is replaced, the gas absorber (22) starts to release gas, and when the gas pressure detector (23) detects that no gas exists in the leather bag (18), the gas absorber (22) stops working;
fifthly, after the gas absorber (22) stops working, the driving motor (19) starts to move in a reverse direction, so that the positive terminal (24) and the negative terminal (25) have reverse currents, the first electromagnet (26) is S-shaped, the second electromagnet (28) starts to contract, and the leather collar (17) is restored to the original state; and sixthly, after the shrinkage is finished, the hydraulic motor (8) starts to drive the movable column (10) to move upwards, so that the fixed plate (12) reaches the inside of the plugging machine column (7), and then the push-pull rod (6) is pushed rightwards, so that the sandwich valve (5) is closed.
2. The plugging method of the plugging device with pressure for the petroleum and natural gas pipeline according to claim 1, characterized in that: the one end fixedly connected with big spring (21) of conduction pole (20), the one end and the gas absorber (22) fixed connection of big spring (21), the both sides fixedly connected with atmospheric pressure detector (23) of gas absorber (22), the one side of leather bag (18) is seted up porosely, and the clearing hole is cup jointed with gas absorber (22) fixed, the outside surface and the baffle (29) contact of leather bag (18).
3. The plugging method of the plugging device with pressure for the petroleum and natural gas pipeline according to claim 1, characterized in that: the radius of the short pipeline (1) of radius when the leather collar (17) does not carry out the shutoff work is little 5 centimetres, the radius when the leather collar (17) does not carry out the shutoff work is 10 centimetres bigger than the radius of leather bag (18).
4. The plugging method of the plugging device with pressure for the petroleum and natural gas pipeline according to claim 1, characterized in that: the second electromagnet (28) is provided with N-type magnetism, the part of the positive terminal (24), the part of the negative terminal (25) fixedly connected with the inner surface of the leather bag (18) correspond to the part of the outer surface of the leather bag (18) fixedly connected with the first electromagnet (26), and the number of the positive terminal (24), the negative terminal (25), the first electromagnet (26), the small spring (27) and the second electromagnet (28) is four and is uniformly distributed.
5. The plugging method of the plugging device with pressure for the petroleum and natural gas pipeline according to claim 1, characterized in that: one end of the small spring (27) is fixedly connected with the first electromagnet (26), the other end of the small spring (27) is fixedly connected with the second electromagnet (28), the length of the small spring (27) is 5 cm, and the elasticity of the small spring is large.
6. The plugging method of the plugging device with pressure for the petroleum and natural gas pipeline according to claim 1, characterized in that: the leather ring (17) is filled with nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011361029.4A CN112361113A (en) | 2020-11-27 | 2020-11-27 | Under-pressure plugging method for petroleum and natural gas pipeline |
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| CN202011361029.4A CN112361113A (en) | 2020-11-27 | 2020-11-27 | Under-pressure plugging method for petroleum and natural gas pipeline |
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| CN112361113A true CN112361113A (en) | 2021-02-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114797653A (en) * | 2022-01-25 | 2022-07-29 | 张利平 | Intelligent proportioning device for processing epoxy powder coating and processing technology thereof |
| CN115289313A (en) * | 2022-10-08 | 2022-11-04 | 廊坊市派博力克科贸有限公司 | Pressure replacing device for gas production tree valve |
| RU2809294C1 (en) * | 2023-04-12 | 2023-12-11 | Общество с ограниченной ответственностью "Научно-Производственное Предприятие "ТехСистема" | Closing device |
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| CN114797653A (en) * | 2022-01-25 | 2022-07-29 | 张利平 | Intelligent proportioning device for processing epoxy powder coating and processing technology thereof |
| CN114797653B (en) * | 2022-01-25 | 2024-04-05 | 东莞市荣昌化工有限公司 | Intelligent proportioning device for processing epoxy powder coating and processing technology thereof |
| CN115289313A (en) * | 2022-10-08 | 2022-11-04 | 廊坊市派博力克科贸有限公司 | Pressure replacing device for gas production tree valve |
| CN115289313B (en) * | 2022-10-08 | 2022-12-30 | 廊坊市派博力克科贸有限公司 | Pressure replacing device for gas production tree valve |
| RU2809294C1 (en) * | 2023-04-12 | 2023-12-11 | Общество с ограниченной ответственностью "Научно-Производственное Предприятие "ТехСистема" | Closing device |
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