CN102853204A - Online disconnecting and connecting method of heavy oil pipeline - Google Patents
Online disconnecting and connecting method of heavy oil pipeline Download PDFInfo
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- CN102853204A CN102853204A CN201110175967XA CN201110175967A CN102853204A CN 102853204 A CN102853204 A CN 102853204A CN 201110175967X A CN201110175967X A CN 201110175967XA CN 201110175967 A CN201110175967 A CN 201110175967A CN 102853204 A CN102853204 A CN 102853204A
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- pipeline
- heavy oil
- flange
- oil pipeline
- pipe
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- 239000000295 fuel oil Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims abstract description 10
- 238000012423 maintenance Methods 0.000 claims abstract description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 5
- 235000011089 carbon dioxide Nutrition 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 17
- 238000007710 freezing Methods 0.000 claims description 9
- 230000008014 freezing Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000004079 fireproofing Methods 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 238000005553 drilling Methods 0.000 abstract 1
- 238000010587 phase diagram Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an online disconnecting and connecting method of a heavy oil pipeline, which comprises the steps of: firstly, coating dry ice on a place of the heavy oil pipeline, which needs to be connected, for cooling; secondly, drilling a place above a to-be maintained place of the heavy oil pipeline by adopting a magnetic drill press, confirming that heavy oil in the pipeline is thick without mobility, exhausting oil gas in the pipeline from a small hole; thirdly, oil-cutting the pipeline by using a portable electric saw; fourthly, moving the cut pipeline away; fifthly, removing heavy oil in a pipeline opening needing to be welded with a flange, plugging a woven bag filled with fireproofing mud on the pipeline opening, coating the fireproofing mud on an outermost opening; sixthly, welding a flange on the opening of the heavy oil pipeline; seventhly, removing fireproofing mud and the woven bag in the pipeline opening of the heavy oil pipeline; eighthly, welding a flange on a pipeline on the other side by using the same method; ninthly, connecting the flange of the pipeline with the flange of the prefabricated new pipeline; and tenthly, insulating the new pipeline, and returning to be a normal state. According to the invention, the maintenance and the connector operation of the oiling state of the heavy oil pipeline can be completed within shorter time.
Description
Technical field
The present invention relates to the oil pipe pipeline connecting method of Ferrous Metallurgy, petrochemical industry.
Background technique
The normal construction flow process of the cut-out of heavy oil pipeline and connection has unified technical stipulation requirement, its construction requirement is: " when the heavy oil pipeline need to overhaul or long period when stopping to send oil; need trapped fuel in the pipe is purged clean; purge the starting point that point is located at pipeline; purge to minute oil tank direction; can adopt steam blowing, the interim joint of purging point employing on the heavy oil pipeline, interior qualified rear just can the maintenance or the interface operation of oil and gas detection of pipeline ".This arrangement and method for construction can be guaranteed construction safety, but shortcoming is that the engineering time is long, and construction cost is high.
When the scene in the state of accident the heavy oil pipeline need carry out at short notice emergency maintenance or interface, use the routine work flow process oversize because of the time, can not satisfy the requirement of produced on-site and safety, and that pipeline is constructed under full oil condition is dangerous high, because be full of the heavy oil of high temperature (about 70 degree) in the pipeline, and good fluidity, and contain a large amount of gas mixtures, in case run into Mars, pipeline very easily occurs to catch fire even explode, On-line construction danger is high.
Summary of the invention
The object of the present invention is to provide the online cut-out of a kind of heavy oil pipeline and connecting means, the method can be finished maintenance and the interface operation of heavy oil pipeline band oil condition within a short period of time, and saves heavy oil.
To achieve these goals, the present invention adopts following technological scheme:
A kind of heavy oil pipeline is online to cut off and connecting means,
Step 1, determine the pipe joint position after, remove to need maintenance segment pipe thermal insulation layer before the construction, and stop the tracing steam pipeline heating of heavy oil pipeline;
Step 2, construction check construction location heavy oil pipeline the previous day, because without heating and insulation, pipeline cools off naturally, using dry ice to be coated on the heavy oil pipeline needs interface position to cool off;
Step 3, the perforate directly over the heavy oil pipeline needs helpdesk of employing magnetic drill are controlled simultaneously the tapping temperature and are not risen, and after perforate is finished, confirm that heavy oil is thick in the pipeline, and tool is mobile, and the interior oil gas of pipeline can be discharged from aperture;
Step 4, use Portable electric saw are in the cutting of pipeline band oil, control cutting speed during cutting;
Step 5, the pipeline under will cutting are removed;
Step 6, cleaning need welded flange pipeline mouth of pipe place heavy oil, then at mouth of pipe place with the braided bag shutoff of filling anti-chamotte, collar extension is coated with completely anti-chamotte, guarantees that heavy oil thoroughly completely cuts off in the mouth of pipe and the pipeline;
Step 7, at heavy oil pipeline upper shed place welded flange;
After step 8, piping flange welding are finished, the anti-chamotte in the cleaning heavy oil mouth of pipe and bag weaved;
Step 9, opposite side pipeline repeating step 6 to 8 carry out flange welding;
Step 10, this piping flange is linked to each other with prefabricated new piping flange;
Step 11, new pipeline is incubated, recovers normally to use.
Heavy oil pipeline in the described step 2 needs the freezing length computation principle of interface position: 3 of the stifled anti-chamotte thickness of pipeline extraordinarily go up the middle duct length that needs excision in the step 6.
The method that the present invention adopts is by construction sequences such as freezing, boring, oil extraction gas, the cutting of not getting angry, cleaning, stifled anti-chamotte, welded flange, the anti-chamotte of removing, installation prefabricated band flanged pipes, finishes maintenance and the interface operation of heavy oil pipeline band oil condition within a short period of time.
Adopt technological scheme of the present invention, its interface time is short, can save the engineering time, in equipment and the personal security, saves heavy oil and steam energy medium in guaranteeing work progress, achieves many things at one stroke.
Description of drawings
Fig. 1 is freezing rear heavy oil pipeline phase diagram in the method for the present invention;
Fig. 2 attach most importance to oil-piping saw lower in the middle of one section schematic diagram;
Fig. 3 attach most importance to oil-piping both sides heavy oil remove after schematic diagram;
Fig. 4 is heavy oil pipeline phase diagram before the flange welding;
Fig. 5 is heavy oil pipeline phase diagram behind the flange welding;
Fig. 6 all takes out rear heavy oil pipeline phase diagram for anti-chamotte;
Fig. 7 oil-piping interface of attaching most importance to is finished schematic diagram;
Fig. 8 oil-piping interface schematic side view of attaching most importance to.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment
The parameter DN300 of construction heavy oil pipeline * 10 material SGP, pipeline adopt steam-heated mode to continue insulation to 70 degree.Pipeline external adopts thermal insulation layer.The pipe joint position is more than terrace, and operating condition is relatively better.
The long new pipeline of prefabricated one section DN300,800mm is finished the interface assembly unit with the new pipeline of D159 and the new pipeline of DN300, end blind plate shutoff, flange of end welding.
A kind of heavy oil pipeline is online to cut off and connecting means,
Step 1, determine the pipe joint position after, first three day of constructing removed interface section pipe insulating layer (approximately 10m), and stops the tracing steam pipeline heating (this moment pipe temperature approximately 70 degree) of heavy oil pipeline.
Step 2, construction check construction location heavy oil pipeline the previous day, because without heating and insulation, pipeline cools off naturally, temperature drops to outdoor temperature very soon, be coated on the heavy oil pipeline with dry ice afterwards and need interface position, direct freezing jointing pipeline, its freezing length is 2.5m approximately, freezing 24 hours, referring to Fig. 1.This subjob intermediate conduit shearing length is 1000mm, and anti-chamotte thickness is generally 500mm, is 2.5m therefore the heavy oil pipeline needs the freezing length of interface position; Be calculated as follows: 3 times of anti-chamotte thickness add needs cutting out pipeline length, i.e. 3 * 500mm+1000mm=2500mm.
(model: J3C-OGO4-32A) need open Φ 20mm hole directly over the cut-off part at the heavy oil pipeline, operation is slowly constantly watered simultaneously, controls the tapping temperature and does not rise for step 3, employing magnetic drill; After perforate is finished, confirm that heavy oil is thick in the pipeline, tool is not mobile, and oil gas can be discharged from aperture in the pipeline, can stop the danger of oil gas blast.
Step 4, because the gas mixture that is full of heavy oil and constantly produces in the pipeline has used Portable electric saw successively along line of cut cutting on the pipeline, note controlling cutting speed during cutting, the DN300 pipeline is controlled at about 15 minutes whole break times.This moment definitely can not gas cutting etc. the method for construction of moving naked light, in case heavy oil pipeline Fire explosion consequence is hardly imaginable.
Step 5, the pipeline under will cutting are removed, because heavy oil is freezing by dry ice, thickness, without mobile uses crowbar, and pipeline is taken off, and heavy oil in the short tube is cleaned out, in the oil drum that reclaims of packing into, referring to Fig. 2.
Step 6, cleaning keep pipeline and remove approximately 500mm length of pipeline opening place heavy oil, because heavy oil is the thickness state in the pipeline, manually the heavy oil on pipeline opening limit are cleared up in the ready oil drum; Then the pipeline that heavy oil pipeline cutting mouth 500mm is long is with filling the braided bag shutoff of preventing chamotte, and collar extension is coated with completely anti-chamotte, guarantees that heavy oil is thoroughly isolated in the mouth of pipe and the pipeline, referring to Fig. 3, Fig. 4.
Step 7, at heavy oil pipeline upper shed place welded flange, referring to Fig. 5.
Anti-chamotte in step 8, the cleaning heavy oil pipeline and bag weaved is referring to Fig. 6.
Step 9, with prefabricated complete 800mm long pipeline group to connecting with bolt.
Step 10, residue need to remove pipe side repeating step 6 to 8 and carry out flange welding, and use the blank flange shutoff, referring to Fig. 7, Fig. 8.
Step 11, the D159 pipeline that picks out at DN300 heavy oil pipeline are connected with pumping plant heavy oil pipe string flange, and pipe insulation can normally be used.
The protective measures that the technical program is implemented also have: spread colour bar cloth around reaching above the green belt below pipe joint, place the iron basin below cutting mouth, prevent the heavy oil befouling environment that pipeline flows out in the cutting process.In cutting process, in cutting position water pipe trickle, cooling.Place two tool portable foam extinguishers in the operating area, send special messenger's monitoring, the heavy oil that cleans out in the pipeline is poured in the ready oil drum.
Being preferred embodiment of the present invention only below, is not for limiting protection scope of the present invention, therefore, all any modifications of doing within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a heavy oil pipeline cuts off and connecting means online, it is characterized in that:
Step 1, determine the pipe joint position after, remove to need maintenance segment pipe thermal insulation layer before the construction, and stop the tracing steam pipeline heating of heavy oil pipeline;
Step 2, construction check construction location heavy oil pipeline the previous day, because without heating and insulation, pipeline cools off naturally, using dry ice to be coated on the heavy oil pipeline needs interface position to cool off;
Step 3, the perforate directly over the heavy oil pipeline needs helpdesk of employing magnetic drill are controlled simultaneously the tapping temperature and are not risen, and after perforate is finished, confirm that heavy oil is thick in the pipeline, and tool is mobile, and the interior oil gas of pipeline can be discharged from aperture;
Step 4, use Portable electric saw are in the cutting of pipeline band oil, control cutting speed during cutting;
Step 5, the pipeline under will cutting are removed;
Step 6, cleaning need welded flange pipeline mouth of pipe place heavy oil, then at mouth of pipe place with the braided bag shutoff of filling anti-chamotte, collar extension is coated with completely anti-chamotte, guarantees that heavy oil thoroughly completely cuts off in the mouth of pipe and the pipeline;
Step 7, at heavy oil pipeline upper shed place welded flange;
After step 8, piping flange welding are finished, the anti-chamotte in the cleaning heavy oil mouth of pipe and bag weaved;
Step 9, opposite side pipeline repeating step 6 to 8 carry out flange welding;
Step 10, this piping flange is linked to each other with prefabricated new piping flange;
Step 11, new pipeline is incubated, recovers normally to use.
2. heavy oil pipeline according to claim 1 cuts off and connecting means online, it is characterized in that: the heavy oil pipeline in the described step 2 needs the freezing length computation principle of interface position: 3 of the stifled anti-chamotte thickness of pipeline extraordinarily go up the middle duct length that needs excision in the step 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110175967.XA CN102853204B (en) | 2011-06-28 | 2011-06-28 | Online disconnecting and connecting method of heavy oil pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110175967.XA CN102853204B (en) | 2011-06-28 | 2011-06-28 | Online disconnecting and connecting method of heavy oil pipeline |
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| Publication Number | Publication Date |
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| CN102853204A true CN102853204A (en) | 2013-01-02 |
| CN102853204B CN102853204B (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110175967.XA Active CN102853204B (en) | 2011-06-28 | 2011-06-28 | Online disconnecting and connecting method of heavy oil pipeline |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384735A (en) * | 2014-08-25 | 2015-03-04 | 陕西延长石油（集团）有限责任公司管道运输公司 | Method for fireproof isolation welding in oil and gas pipeline hot work |
| CN105436816A (en) * | 2015-12-07 | 2016-03-30 | 中国神华能源股份有限公司 | Replacement method for rotary track of mechanical equipment |
| CN105889692A (en) * | 2016-06-12 | 2016-08-24 | 李得恩 | Water-soluble pipeline plugging device and pipeline plugging method thereof |
| CN109681714A (en) * | 2018-12-20 | 2019-04-26 | 科莱斯（天津）电热科技有限公司 | A kind of method that accompanying-heat cable threading is welded with steel pipe skylight |
| CN111322485A (en) * | 2020-02-07 | 2020-06-23 | 王宁宁 | Pipe repair device |
| CN111396689A (en) * | 2020-05-13 | 2020-07-10 | 杭州容旗科技有限公司 | Equipment for replacing PVC pipe |
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|---|---|---|---|---|
| CN2094672U (en) * | 1991-07-20 | 1992-01-29 | 徐成江 | Flow cutting machine for petroleum pipeline |
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| DE19645346A1 (en) * | 1996-11-04 | 1998-05-07 | Preussag Rohrsanierung Gmbh | Plastics sleeve for protecting buried pipeline |
| GB2344147A (en) * | 1998-11-26 | 2000-05-31 | Vosper Thornycroft Ltd | Encasing tubular component |
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2011
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2094672U (en) * | 1991-07-20 | 1992-01-29 | 徐成江 | Flow cutting machine for petroleum pipeline |
| CN1065317A (en) * | 1992-03-12 | 1992-10-14 | 辽河石油勘探局兴隆台采油厂 | A kind of fire extinguishing and gush-stopping of oil/gas well method and device |
| DE19645346A1 (en) * | 1996-11-04 | 1998-05-07 | Preussag Rohrsanierung Gmbh | Plastics sleeve for protecting buried pipeline |
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Non-Patent Citations (3)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384735A (en) * | 2014-08-25 | 2015-03-04 | 陕西延长石油（集团）有限责任公司管道运输公司 | Method for fireproof isolation welding in oil and gas pipeline hot work |
| CN105436816A (en) * | 2015-12-07 | 2016-03-30 | 中国神华能源股份有限公司 | Replacement method for rotary track of mechanical equipment |
| CN105889692A (en) * | 2016-06-12 | 2016-08-24 | 李得恩 | Water-soluble pipeline plugging device and pipeline plugging method thereof |
| CN105889692B (en) * | 2016-06-12 | 2018-01-02 | 李得恩 | A kind of water-soluble pipeline plug and its pipe plugging method |
| CN109681714A (en) * | 2018-12-20 | 2019-04-26 | 科莱斯（天津）电热科技有限公司 | A kind of method that accompanying-heat cable threading is welded with steel pipe skylight |
| CN111322485A (en) * | 2020-02-07 | 2020-06-23 | 王宁宁 | Pipe repair device |
| CN111396689A (en) * | 2020-05-13 | 2020-07-10 | 杭州容旗科技有限公司 | Equipment for replacing PVC pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102853204B (en) | 2014-03-19 |
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