CN103851303B - Oil and gas pipeline Quick leak stoppage apparatus and method - Google Patents

Oil and gas pipeline Quick leak stoppage apparatus and method Download PDF

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Publication number
CN103851303B
CN103851303B CN201410127979.9A CN201410127979A CN103851303B CN 103851303 B CN103851303 B CN 103851303B CN 201410127979 A CN201410127979 A CN 201410127979A CN 103851303 B CN103851303 B CN 103851303B
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steel cage
oil
interior
ring
steel
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Expired - Fee Related
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CN201410127979.9A
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CN103851303A (en
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王连英
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王连英
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/168Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
    • F16L55/175Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by using materials which fill a space around the pipe before hardening

Abstract

A kind of oil and gas pipeline Quick leak stoppage apparatus and method, the interior steel cage of the embedding rubber seal ring having the bolt that is nested together to be connected and outer steel sleeve, interior steel cage cover mouth has outer chamfering, interior steel cage top draining hole is connected with drain valve, on interior steel cage, cylinder has conduction hole and valve handle hole, has aluminum joint ring between interior steel cage outer steel sleeve, and the lower end of outer steel sleeve is saddle-shaped ring running-on, there is outer chamfering at the saddle-shaped ring running-on edge of outer steel sleeve lower end, and the upper end of outer steel sleeve is connected with seal cap.The present invention easily connects other compressive engagement device, and drainage is convenient, small volume, after on the tight-lipped leakage point tightly covering on oil and gas pipeline of saddle-shaped ring cover of interior steel cage, anticorrosive coat, oil and the iron rust in the outer chamfering of annular can be cleaned out, direct filling with sealant, rubber seal be sealed reliable, after on the leakage point that interior steel cage first covers on oil and gas pipeline, outer steel cage can first be fixed on interior steel cage, is convenient to rubber seal operation, only establishes aluminum joint ring together between interior steel cage and outer steel cage, structure is simple, and sealing is reliable.

Description

Oil and gas pipeline Quick leak stoppage apparatus and method
Technical field
The present invention relates to the method for maintaining of a kind of oil and gas pipeline maintenance Assisted Facility and a kind of oil and gas pipeline, particularly a kind of blocking device to the local leakage point quick pressurize on oil and gas pipeline and method for blocking.
Background technique
Oil and gas pipeline is used for long-distance transfer oil and rock gas.Mostly oil and gas pipeline is to be embedded in underground, also has plenty of on the ground.Oil and natural gas in oil and gas pipeline carries under higher discharge pressure.Oil and gas pipeline is in long-term running; often can occur to produce the local leakage such as crack and hole point because of reasons such as machinery or chemical corrosions; these local leakage points cause the oil and natural gas in oil and gas pipeline to leak outflow; the outflow that leaks of oil and natural gas is not only and also can be caused security incident to the waste of resource, needs timely shutoff.Because the pressure in oil and gas pipeline is very high, the effluent that leaks is flammable liquid or gas, and the leakage point on shutoff oil and gas pipeline is very difficult.In prior art, in Chinese patent ZL2009 1 0010707.X, disclose a kind of oil gas pipeline rapid pressured plugging apparatus and method for blocking.
Above-mentioned oil gas pipeline rapid pressured plugging apparatus has steel cage and outer steel sleeve in the cylindrical shape that is nested together, there is radial direction through hole the top of interior steel cage, there is draining hole the side of interior steel cage, interior steel cage lower end is saddle-shaped ring cover mouth, seal ring is had in saddle-shaped ring cover mouth, there is interior chamfering at the saddle-shaped ring cover mouth edge of interior steel cage lower end, there is the radial hole for injecting glue of interior steel cage at interior chamfering place, there is the saddle-shaped ring mouth of pipe outer steel sleeve lower end, seal ring is had between the outer wall of outer steel sleeve inwall and interior steel cage hypomere pipe, sidewall between the lower end mouth of pipe of outer steel sleeve and seal ring has the radial hole for injecting glue of outer steel sleeve, the outer wall of interior steel cage epimere pipe has screw thread, screw thread is rotary with nut.
Above-mentioned oil gas pipeline rapid pressured plugging method is, first connects drain valve and drainage tube at draining hole; Tightly cover on the leakage point of oil and gas pipeline tight-lipped for the saddle-shaped ring cover of interior steel cage with force application device again, allow the leakage point oil gas that leaks flow to safe distant place through drainage tube; Again anticorrosive coat, oil and rust around steel cage saddle-shaped ring cover mouth interior on pipeline are cleaned out, expose the oil and gas pipes steel surface that can weld; Sealer is injected in gap in the saddle-shaped ring cover mouth of interior steel cage radial hole for injecting glue inside steel cage lower end between chamfering and seal ring; Rotating nut again, the lower nozzle promoting outer steel sleeve is pressed on oil and gas pipeline; Sealer is injected to the gap between the inwall and interior steel cage outer wall of outer steel sleeve again from the radial hole for injecting glue of outer steel sleeve; By the method for electric welding, the lower end mouth of pipe of outer steel sleeve is welded on oil/gas pipe pipeline outer wall again; Close drain valve, remove drainage tube, be separately connected in the upper end of outer steel sleeve by the upper cover that cover mouth external diameter is identical with the external diameter of outer steel sleeve, drain valve is covered in upper cover, with the method for electric welding upper cover and outer steel sleeve welded together.
Relating to inflammable and explosive high-pressure liquid to during oil and gas pipes local leakage point rapid pressured plugging, is an operation high to security requirement.The structure of oil gas pipeline rapid pressured plugging apparatus, step in oil gas pipeline rapid pressured plugging method all greatly affects the rapid pressured plugging operation to oil and gas pipes local leakage point, above-mentioned oil gas pipeline rapid pressured plugging apparatus of the prior art and method have following deficiency
1. in, steel cage is the steel cage of upper end closed, is inconvenient to connect multiple force application device;
2. draining hole is in the side of interior steel cage, needs in-site installation lateral drainage valve during use, inconvenient drainage operation, also makes the seal cap volume of last welding large;
3. in, the chamfering at the saddle-shaped ring cover mouth edge of steel cage lower end is interior chamfering, after on tight-lipped for the saddle-shaped ring cover of the interior steel cage leakage point tightly covering on oil and gas pipeline, anticorrosive coat, oil and iron rust in chamfering in annular can not be cleaned out, when rubber seal operation done by gap injection sealer in the radial saddle-shaped ring cover mouth edge, hole for injecting glue inside steel cage lower end of interior steel cage between chamfering and seal ring, can not ensure to form continuous print sealed rubber ring, the rubber seal between interior steel cage and oil and gas pipeline be sealed unreliable;
4. in, steel cage and outer steel cage are the two pieces be separated, and after on the leakage point first covering on oil and gas pipeline at interior steel cage, the outer steel cage be enclosed within interior steel cage does not have the position of fixed placement, is not easy to the rubber seal operation between interior steel cage and oil and gas pipeline;
5., from the radial hole for injecting glue of outer steel sleeve to after sealer is injected in the gap between the inwall and interior steel cage outer wall of outer steel sleeve, can not extrude sealer, make the sealed rubber ring leakiness between outer steel sleeve and interior steel cage, rubber seal unreliable;
6. there are three road rubber seal rings between steel cage and outer steel cage in, complex structure, can not be high temperature resistant, when welding, rubber seal ring sealing is extremely unreliable.
Above-mentioned deficiency to cause when oil and gas pipes local leakage point rapid pressured plugging troublesome poeration, poor stability, operating efficiency low.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, proposing a kind of easy to operate, Security good, operating efficiency is high oil and gas pipeline Quick leak stoppage apparatus and method.
The present invention is achieved using the following method.
Oil and gas pipeline Quick leak stoppage apparatus has steel cage and outer steel sleeve in the cylindrical shape that is nested together,
The inner circumference of interior steel cage is embedded with cylindrical shape rubber seal ring, the lower end of rubber seal ring and interior steel cage is saddle-shaped ring cover mouth, there is outer chamfering at the saddle-shaped ring cover mouth edge of interior steel cage lower end, the excircle of interior steel cage lower end is with the hoop be formed by connecting by two saddle type semicircle steel loops, connection socket is had between two saddle type semicircle steel loops of hoop, radial screw is connected with between connection socket, there is the axis draining hole on the same line of axis and interior steel cage on the cover top of interior steel cage, the axis of axis and interior steel cage upper cylinder is on the same line had above the cover top of interior steel cage, draining hole is connected with the drain valve in upper cylinder, there is drainage pore in the drain valve outlet port of upper cylinder side wall, there is valve handle hole at the drainage valve handle place of upper cylinder side wall, there is the radial direction through hole communicated the top of upper cylinder, there is connecting cover the upper end of upper cylinder, there is the lower connecting screw hole be uniformly distributed along the circumference on interior steel cage cover top, the excircle on interior steel cage cover top has annular recessed ledge frame, recessed ledge frame there is cross section be leg-of-mutton aluminum joint ring, the outside screw in upper cylinder stage casing is connected with radial engaging lug, radial engaging lug there is the circular hole matched with the lower connecting screw hole on interior steel cage cover top,
There is interior radial ring the top of outer steel sleeve inner circumference, interior radial ring is evenly equipped with the upper connecting screw hole matched with the lower connecting screw hole on interior steel cage cover top, the lower end of outer steel sleeve is saddle-shaped ring running-on, there is outer chamfering at the saddle-shaped ring running-on edge of outer steel sleeve lower end, be connected with bolt between interior steel cage and the connecting screw hole of outer steel sleeve, the upper end of outer steel sleeve is connected with seal cap.
Oil and gas pipeline rapid plugging method for fiberglass has the following steps:
1. get the oil and gas pipeline Quick leak stoppage apparatus proposed in the invention described above scheme, remove seal cap, with bolt, radial ring in outer steel sleeve inner circumference is connected on the radial engaging lug outside upper cylinder stage casing, connect drainage tube in drain valve outlet;
2. the radial direction through hole on interior steel cage above cylinder connects force application device, with force application device, inner circumference is embedded with steel cage saddle-shaped ring cover mouth in rubber seal ring to cover on tightly on the leakage point of oil and gas pipeline round the leakage point of oil and gas pipeline, keep in steel cage be pressed on the leakage point of oil and gas pipeline pressure, open drain valve, allow oil and gas pipeline leakage point leak flow out oil gas enter in interior steel cage again through draining hole, drain valve and drainage tube flow to safe distant place, the saddle-shaped ring cover mouth of interior steel cage is made not have hydrocarbon seepage, with cleaning tool the anticorrosive coat around the outer chamfering of steel cage saddle-shaped ring cover mouth interior on oil and gas pipes, oil and rust are cleaned out, expose the welding steel surface of oil and gas pipes, refractory seal glue is filled in the outer chamfering at interior steel cage saddle-shaped ring cover mouth edge, by hoop, the refractory seal glue of filling in outer chamfering is pressed in outer chamfering tightly,
3. the radial engaging lug of outer steel sleeve from upper cylinder stage casing is unloaded down, allow the interior radial ring of outer steel sleeve inner circumference drop on the top, angle of aluminum joint ring circumferentially;
4. inject refractory seal glue from the upper connecting screw hole radial ring in outer steel sleeve inner circumference between outer steel sleeve and interior steel cage, then with bolt, outer steel sleeve is connected on interior steel cage;
5. tight a bolt, allow outer steel sleeve lower end have the saddle-shaped ring running-on of outer chamfering to be against weldable steel that oil and gas pipes exposes on the surface, flattens aluminum joint ring simultaneously, again that the refractory seal glue laminated inside aluminum joint ring is tight, the sealing in realizing between steel cage and outer steel sleeve;
6 have the saddle-shaped ring running-on of outer chamfering to be welded on oil/gas pipe pipeline outer wall outer steel sleeve lower end by the method for electric welding;
7. close drain valve, remove drainage tube, remove force application device, by the method for electric welding, seal cap is welded in the upper end of outer steel sleeve.
The present invention compares with method with the oil and gas pipeline Quick leak stoppage apparatus of prior art, has the following advantages:
1. in, steel cage above has upper cylinder, and there are radial direction through hole and connecting cover in upper cylinder upper end, and it can be changed and install multiple coupling for connecting different force application device, as being connected on excavator shovel tooth or on the force application device such as artificial fixing frame;
2. draining hole is on interior steel cage, and draining hole is connected with drain valve, facilitates drainage operation, and drain valve is in the cylinder on interior steel cage, can make the small volume of seal cap;
3. in, the chamfering at the saddle-shaped ring cover mouth edge of steel cage lower end is outer chamfering, the saddle-shaped ring cover mouth of interior steel cage
After on the leakage point tightly covering on oil and gas pipeline, anticorrosive coat, oil and the iron rust in the outer chamfering of annular can be cleaned out, can directly to saddle-shaped ring cover mouth edge, interior steel cage lower end outer chamfering filling with sealant, the excircle of interior steel cage lower end is with the hoop be formed by connecting by two saddle type semicircle steel loops, rubber seal is sealed reliable;
4. after on the leakage point that in, steel cage first covers on oil and gas pipeline, outer steel cage can first fixed placement on interior steel cage, be convenient to rubber seal operation;
5. between steel cage and outer steel cage without rubber seal ring, structure is simple, and sealing is reliable;
6., after the inner side injection refractory seal glue of the aluminum joint ring between interior steel cage and outer steel cage, compress with sieve bolt and while compression aluminum joint ring, also refractory seal glue laminated contracted, making overall sealing more reliable.
Below in conjunction with drawings and Examples, the present invention is further described.
Accompanying drawing explanation
Fig. 1 is the main cross-sectional schematic of a kind of oil and gas pipeline Quick leak stoppage apparatus that scheme of the invention according to the present invention proposes;
Fig. 2 is the side cross-sectional schematic of Fig. 1;
Fig. 3 is that the folding of Fig. 1 divides schematic diagram;
Fig. 4 is that the folding of Fig. 2 divides schematic diagram;
Fig. 5 is the A-A cross-sectional schematic of Fig. 3;
Fig. 6 is the B-B cross-sectional schematic of Fig. 3;
Fig. 7 is the C-C cross-sectional schematic of Fig. 3;
Fig. 8 ~ Figure 14 is the schematic diagram of leak stopping step.
Embodiment
In Fig. 1 ~ Fig. 7, oil and gas pipeline Quick leak stoppage apparatus has steel cage 1 and outer steel sleeve 2 in the cylindrical shape that is nested together,
The inner circumference of interior steel cage is embedded with cylindrical shape rubber seal ring 3, the lower end of rubber seal ring and interior steel cage is saddle-shaped ring cover mouth, there is outer chamfering 4 at the saddle-shaped ring cover mouth edge of interior steel cage lower end, the excircle of interior steel cage lower end is with the hoop 5 be formed by connecting by two saddle type semicircle steel loops, connection socket 15 is had between two saddle type semicircle steel loops of hoop, radial screw 23 is connected with between connection socket, there is the axis draining hole 6 on the same line of axis and interior steel cage on the cover top of interior steel cage, the axis of axis and interior steel cage upper cylinder 7 is on the same line had above the cover top of interior steel cage, draining hole is connected with the drain valve 8 in upper cylinder, there is drainage pore 9 in the drain valve outlet port of upper cylinder side wall, there is valve handle hole 10 at the drainage valve handle place of upper cylinder side wall, there is the radial direction through hole 11 communicated the top of upper cylinder, there is connecting cover 24 upper end of upper cylinder, the lower connecting screw hole 12 be uniformly distributed along the circumference is had outside the upper cylinder on interior steel cage cover top, the excircle on interior steel cage cover top has annular recessed ledge frame 13, recessed ledge frame there is cross section be leg-of-mutton aluminum joint ring 14, the outside screw in upper cylinder stage casing is connected with radial engaging lug 16, radial engaging lug there is the circular hole 17 matched with the lower connecting screw hole on interior steel cage cover top,
There is interior radial ring 18 top of outer steel sleeve inner circumference, interior radial ring is evenly equipped with the upper connecting screw hole 19 matched with the lower connecting screw hole on interior steel cage cover top, the lower end of outer steel sleeve is saddle-shaped ring running-on, there is outer chamfering 20 at the saddle-shaped ring running-on edge of outer steel sleeve lower end, be connected with bolt 21 between interior steel cage and the connecting screw hole of outer steel sleeve, the upper end of outer steel sleeve is connected with seal cap 22.
In Fig. 8 ~ Figure 14, oil and gas pipeline rapid plugging method for fiberglass has the following steps:
1. get the oil and gas pipeline Quick leak stoppage apparatus proposed in the invention described above scheme, remove seal cap, with bolt, radial ring in outer steel sleeve inner circumference is connected on the radial engaging lug outside upper cylinder stage casing, connect drainage tube in drain valve outlet;
2. the radial direction through hole on interior steel cage above cylinder inserts straight-bar bolt, straight-bar bolt link is connected on the teeth of power shovel lower end, with excavator, inner circumference is embedded with steel cage saddle-shaped ring cover mouth in rubber seal ring to cover on tightly on the leakage point of oil and gas pipeline round the leakage point of oil and gas pipeline, keep in steel cage be pressed on the leakage point of oil and gas pipeline pressure, open drain valve, allow oil and gas pipeline leakage point leak flow out oil gas enter in interior steel cage again through draining hole, drain valve and drainage tube flow to safe distant place, the saddle-shaped ring cover mouth of interior steel cage is made not have hydrocarbon seepage, with cutter, shovel, the cleaning tools such as cone are the anticorrosive coat around the outer chamfering of steel cage saddle-shaped ring cover mouth interior on oil and gas pipes, oil and rust are cleaned out, expose the welding steel surface of oil and gas pipes, refractory seal glue is filled in the outer chamfering at interior steel cage saddle-shaped ring cover mouth edge, by hoop, the refractory seal glue of filling in outer chamfering is pressed in outer chamfering tightly,
3. the radial engaging lug of outer steel sleeve from upper cylinder stage casing is unloaded down, remove radial engaging lug, allow the interior radial ring of outer steel sleeve inner circumference drop on the top, angle of aluminum joint ring circumferentially;
4. inject refractory seal glue from the upper connecting screw hole radial ring in outer steel sleeve inner circumference between outer steel sleeve and interior steel cage, then with bolt, outer steel sleeve is connected on interior steel cage;
5. tight a bolt, allow outer steel sleeve lower end have the saddle-shaped ring running-on of outer chamfering to be against weldable steel that oil and gas pipes exposes on the surface, flattens aluminum joint ring simultaneously, again that the refractory seal glue laminated inside aluminum joint ring is tight, the sealing in realizing between steel cage and outer steel sleeve;
6 have the saddle-shaped ring running-on of outer chamfering to be welded on oil/gas pipe pipeline outer wall outer steel sleeve lower end by the method for electric welding;
7. close drain valve, remove drainage tube, remove force application device, by the method for electric welding, seal cap is welded in the upper end of outer steel sleeve.

Claims (2)

1. an oil and gas pipeline Quick leak stoppage apparatus, there is steel cage and outer steel sleeve in the cylindrical shape that is nested together, the inner circumference of interior steel cage is embedded with cylindrical shape rubber seal ring, the lower end of rubber seal ring and interior steel cage is saddle-shaped ring cover mouth, it is characterized in that: there is outer chamfering at the saddle-shaped ring cover mouth edge of interior steel cage lower end, the excircle of interior steel cage lower end is with the hoop be formed by connecting by two saddle type semicircle steel loops, connection socket is had between two saddle type semicircle steel loops of hoop, radial screw is connected with between connection socket, there is the axis draining hole on the same line of axis and interior steel cage on the cover top of interior steel cage, the axis of axis and interior steel cage upper cylinder is on the same line had above the cover top of interior steel cage, draining hole is connected with the drain valve in upper cylinder, there is drainage pore in the drain valve outlet port of upper cylinder side wall, there is valve handle hole at the drainage valve handle place of upper cylinder side wall, there is the radial direction through hole communicated the top of upper cylinder, there is connecting cover the upper end of upper cylinder, there is the lower connecting screw hole be uniformly distributed along the circumference on interior steel cage cover top, the excircle on interior steel cage cover top has annular recessed ledge frame, recessed ledge frame there is cross section be leg-of-mutton aluminum joint ring, the outside in upper cylinder stage casing is connected with radial engaging lug, radial engaging lug there is the circular hole matched with the lower connecting screw hole on interior steel cage cover top, there is interior radial ring the top of outer steel sleeve inner circumference, interior radial ring is evenly equipped with the upper connecting screw hole matched with the lower connecting screw hole on interior steel cage cover top, the lower end of outer steel sleeve is saddle-shaped ring running-on, there is outer chamfering at the saddle-shaped ring running-on edge of outer steel sleeve lower end, bolt is connected with between interior steel cage and the connecting screw hole of outer steel sleeve, the upper end of outer steel sleeve is connected with seal cap.
2. an oil and gas pipeline rapid plugging method for fiberglass, is characterized in that: have the following steps:
(1) get the oil and gas pipeline Quick leak stoppage apparatus described in claim 1, remove seal cap, with bolt, radial ring in outer steel sleeve inner circumference is connected on the radial engaging lug outside upper cylinder stage casing, connect drainage tube in drain valve outlet;
(2) radial direction through hole on interior steel cage above cylinder connects force application device, with force application device, inner circumference is embedded with steel cage saddle-shaped ring cover mouth in rubber seal ring to cover on tightly on the leakage point of oil and gas pipeline round the leakage point of oil and gas pipeline, keep in steel cage be pressed on the leakage point of oil and gas pipeline pressure, open drain valve, allow oil and gas pipeline leakage point leak flow out oil gas enter in interior steel cage again through draining hole, drain valve and drainage tube flow to safe distant place, the saddle-shaped ring cover mouth of interior steel cage is made not have hydrocarbon seepage, with cleaning tool steel cage saddle-shaped ring interior on oil and gas pipes
Anticorrosive coat, oil and rust around the outer chamfering of cover mouth are cleaned out, expose the welding steel surface of oil and gas pipes, in the outer chamfering at interior steel cage saddle-shaped ring cover mouth edge, fill refractory seal glue, by hoop, the refractory seal glue of filling in outer chamfering is pressed in outer chamfering tightly;
(3) outer steel sleeve is unloaded down from upper cylinder, allow the interior radial ring of outer steel sleeve inner circumference drop on the top, angle of aluminum joint ring circumferentially;
(4) inject refractory seal glue from the upper connecting screw hole radial ring in outer steel sleeve inner circumference between outer steel sleeve and interior steel cage, then with bolt, outer steel sleeve is connected on interior steel cage;
(5) tight a bolt, allow outer steel sleeve lower end have the saddle-shaped ring running-on of outer chamfering to be against weldable steel that oil and gas pipes exposes on the surface, flattens aluminum joint ring simultaneously, again that the refractory seal glue laminated inside aluminum joint ring is tight, the sealing in realizing between steel cage and outer steel sleeve;
(6) the saddle-shaped ring running-on of outer chamfering there is is to be welded on oil/gas pipe pipeline outer wall outer steel sleeve lower end by the method for electric welding;
(7) close drain valve, remove drainage tube, remove force application device, by the method for electric welding, seal cap is welded in the upper end of outer steel sleeve.
CN201410127979.9A 2014-04-01 2014-04-01 Oil and gas pipeline Quick leak stoppage apparatus and method Expired - Fee Related CN103851303B (en)

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Application Number Priority Date Filing Date Title
CN201410127979.9A CN103851303B (en) 2014-04-01 2014-04-01 Oil and gas pipeline Quick leak stoppage apparatus and method

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Application Number Priority Date Filing Date Title
CN201410127979.9A CN103851303B (en) 2014-04-01 2014-04-01 Oil and gas pipeline Quick leak stoppage apparatus and method

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CN103851303B true CN103851303B (en) 2015-09-09

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107339544B (en) * 2017-09-05 2018-11-27 青岛理工大学 Flow-guiding type oil gas on-line production send Pipe leakage stopper

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1098992C (en) * 1999-06-28 2003-01-15 中国人民武装警察部队学院 Emergency leakage blocking device
CN2867056Y (en) * 2005-04-06 2007-02-07 中国石油天然气股份有限公司 Pipeline fast guiding plugging device
JP2010106954A (en) * 2008-10-30 2010-05-13 Seibu Gas Co Ltd Closing member, leak checker, and method for repairing drilled hole of synthetic resin tube
CN201377655Y (en) * 2009-03-17 2010-01-06 杨立东 Fast pressurized plugging device of oil and gas pipeline
CN202109147U (en) * 2011-01-07 2012-01-11 中国石油天然气集团公司 End stop type pipeline first-aid repair jig
CN103557401B (en) * 2013-11-01 2015-07-08 中国石油大学(华东) Under-pressure leaking stoppage device for oil and gas conveying pipeline
CN203743730U (en) * 2014-04-01 2014-07-30 王连英 Quick leakage stopping device for oil gas pipeline

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