CN105260950A - Failure control method for oil and gas pipelines - Google Patents
Failure control method for oil and gas pipelines Download PDFInfo
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- CN105260950A CN105260950A CN201510717745.4A CN201510717745A CN105260950A CN 105260950 A CN105260950 A CN 105260950A CN 201510717745 A CN201510717745 A CN 201510717745A CN 105260950 A CN105260950 A CN 105260950A
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Abstract
The present invention discloses a failure control method for oil and gas pipelines, and relates to the technical field of management of oil and gas pipelines. The failure control method comprises the steps of: collecting failure cases of oil and gas pipelines at home and abroad, establishing a failure information database of the oil and gas pipelines; performing comprehensive statistics analysis for the failure cases stored in the failure information database, determining failure modes of the oil and gas pipelines on the basis of service conditions of planned pipelines; researching occurrence reasons, mechanisms and influence factors of the failure modes; and putting forward control measures response to the failure modes. The failure control method of the present invention comprehensively analyzes service conditions of pipelines based on a failure information case database, determines main failure modes and researches failure mechanisms and reasons thereof, and finally puts forward control measures for the main failure modes of planned pipelines, thereby avoiding failure events possibly occurring on the pipelines.
Description
Technical field
The present invention relates to oil and gas pipes management technical field, particularly relate to a kind of oil and gas pipes Failure Control method.
Background technology
Pipeline transportation, as one of five large means of transportation, plays increasing effect in oil-gas transportation.The northeast that China is backbone with the transnational oil and gas pipes such as Sino-Russian, the Central Asia, middle Burma, northwest, southwestern gas channel are being formed, and jointly form four large oil and gas import strategic corridor with sea-freight oil and LNG.In addition, the duct length of oil field gathering and transportation pipe network and pipeline network of fuel gas in city is about hundreds of thousands kilometer, is also the important component part of oil and gas pipes.
China's oil and gas pipes construction is started late, but pipeline failure accident occurs repeatedly.Oil-gas pipeline safety operational relation is to national energy security and public safety.Protection oil and gas pipes is ensure the economic security of country, the security of the lives and property of social stability and the people fundamentally.
The Failure Control of oil and gas pipes is based on oil and gas pipes fail message database with based on to the analysis of planning to build oil and gas pipes service condition, determine contingent dominant failure mode after planning to build pipeline puts into effect, the Failure Control failure mechanism of Research on Oil feed channel, failure cause and influence factor, the measure controlling to lose efficacy could be proposed, stop the generation of serious accident to greatest extent, ensure the safe and reliable of pipeline Life cycle.And the method not about oil and gas pipes Failure Control in prior art.
Summary of the invention
The object of the present invention is to provide a kind of oil and gas pipes Failure Control method, thus solve the foregoing problems existed in prior art.
To achieve these goals, oil and gas pipes Failure Control method of the present invention, based on oil and gas pipes fail message case library and the service condition planning to build pipeline, integratedly propose oil and gas pipes dominant failure mode, the method comprises:
S1, collects oil and gas pipes inefficacy case both domestic and external, sets up oil and gas pipes fail message database;
S2, carries out comprehensive statistics analysis to the inefficacy case stored in database, on the basis of service condition of planning to build pipeline, determines the failure mode of oil and gas pipes;
S3, studies the occurrence cause of failure mode, mechanism and influence factor;
S4, proposes the control measure of the above-mentioned failure mode of reply.
Preferably, in step S2, large data analysis is carried out to oil and gas pipes fail message database, determines and plan to build pipeline service condition and the inefficacy case of specifications parameter comprehensive similarity more than 80%, using the set of its failure mode as the Failure Control target planning to build oil and gas pipes.
Preferably, described in rapid S3, failure mode mainly comprises step by step: dynamically ductile fracture failure mode, black brittleness fracture failure pattern, strain failure mode, the relevant strain-aging failure mode of corrosion.
More preferably, step by step in rapid S3, when failure mode is dynamic ductile fracture failure mode, determine Failure Control measure by the following method: adopt Battelle hyperbolic method determination gas pipe line dynamic ductile fracture arrest toughness index, or determine gas pipe line dynamic ductile fracture arrest toughness index, using this toughness index as tube product acceptance condition by the test of pipeline full-scale gas blast.
More preferably, in step S3, when failure mode is black brittleness fracture failure pattern, determine Failure Control measure by the following method:
A1, definitely surface pressure pipeline configuration pattern and operating condition;
A2, calculates the numerical value of pipeline minimum wall temperature;
A3, analyzes the pipeline minimum wall temperature under stopping transportation pressurize operating mode;
A4, using pipeline minimum wall temperature as pipe design temperature;
A5, determines the anti-low-temperature brittle fracture toughness index of steel pipe or pipe fitting;
A6, Control experiment temperature is not less than pipe design temperature, using the Product Acceptance Review condition of anti-low-temperature brittle fracture toughness index as steel pipe or pipe fitting.
More preferably, in step S3, when failure mode is strain failure mode, determines Failure Control measure by the following method, comprising:
A, high-grade pipe strain capacity predict model: on the basis of pipeline strain limit prediction theory and method, set up high-strength line-pipe steel plastic anisotropy constitutive model and high-strength line-pipe steel pipe flexing strain forecast model, prediction pipeline flexing answers varying capacity;
B, carries out the full-scale flexural deformation test of high-pressure large-caliber pressurized tube, checking steel pipe flexing strain capacity predict model;
C, according to pipe design parameter and service condition, determines the strain demand of oil and gas pipes;
D, the flexing strain capacity predict value of tube product should be not less than the strain demand of oil and gas pipes, to control the deformation failure pattern of oil and gas pipes.
More preferably, in step S3, when failure mode, when corroding relevant strain-aging failure mode, determines Failure Control measure by the following method:
B1, the horizontal timeliness tensile property after being on active service by manual simulation's ag(e)ing test determination steel pipe and ballistic work and longitudinal timeliness tensile property;
B2, the horizontal timeliness tensile property of tube product and ballistic work and longitudinal timeliness tensile property should meet tube product inspection specifications, to control the corrosion failure because steel pipe timeliness causes.
The invention has the beneficial effects as follows: the present invention is based on fail message case library, comprehensive analysis conduit service condition, determine dominant failure mode and its failure mechanism and reason are studied, the control measure of pipeline dominant failure mode are planned to build in final proposition, thus avoid the contingent failure event of pipeline.
Accompanying drawing explanation
Fig. 1 is oil and gas pipes Failure Control method flow schematic diagram;
Fig. 2 is failure mode composition schematic diagram.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the present invention is further elaborated.Should be appreciated that embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Oil and gas pipes Failure Control method described in the present embodiment, based on fail message case library, comprehensive analysis conduit service condition, determine dominant failure mode and its failure mechanism and reason are studied, the control measure of pipeline dominant failure mode are planned to build in final proposition, contain the oil and gas pipes dominant failure mode such as fracture, distortion, corrosion, thus avoid the contingent failure event of pipeline.The method comprises:
S1, collects oil and gas pipes inefficacy case both domestic and external, sets up oil and gas pipes fail message database;
S2, carries out comprehensive statistics analysis to the inefficacy case stored in database, on the basis of service condition of planning to build pipeline, determines the failure mode of oil and gas pipes;
S3, studies the occurrence cause of failure mode, mechanism and influence factor;
S4, proposes the control measure of the above-mentioned failure mode of reply.
More detailed explanation illustrates:
(1) in step S2, large data analysis is carried out to oil and gas pipes fail message database, determine and plan to build pipeline service condition and the inefficacy case of specifications parameter comprehensive similarity more than 80%, using the set of its failure mode as the Failure Control target planning to build oil and gas pipes.
(2) described in step S3, failure mode mainly comprises: dynamically ductile fracture failure mode, black brittleness fracture failure pattern, strain failure mode, the relevant strain-aging failure mode of corrosion.
1, when failure mode is dynamic ductile fracture failure mode, determine Failure Control measure by the following method: adopt Battelle hyperbolic method determination gas pipe line dynamic ductile fracture arrest toughness index, or determine gas pipe line dynamic ductile fracture arrest toughness index, using this toughness index as tube product acceptance condition by the test of pipeline full-scale gas blast.
2, when failure mode is black brittleness fracture failure pattern, Failure Control measure is determined by the following method:
A1, definitely surface pressure pipeline configuration pattern and operating condition;
A2, calculates the numerical value of pipeline minimum wall temperature;
A3, analyzes the pipeline minimum wall temperature under stopping transportation pressurize special operation condition;
A4, using pipeline minimum wall temperature as pipe design temperature;
A5, determines the anti-low-temperature brittle fracture toughness index of steel pipe or pipe fitting;
A6, Control experiment temperature is not less than pipe design temperature, using the Product Acceptance Review condition of anti-low-temperature brittle fracture toughness index as steel pipe or pipe fitting.
3, in step S3, when failure mode is strain failure mode, determines Failure Control measure by the following method, comprising:
A, high-grade pipe strain capacity predict model: on the basis of pipeline strain limit prediction theory and method, set up high-strength line-pipe steel plastic anisotropy constitutive model and high-strength line-pipe steel pipe flexing strain forecast model, prediction pipeline flexing answers varying capacity;
B, carries out the full-scale flexural deformation test of high-pressure large-caliber pressurized tube, checking steel pipe flexing strain capacity predict model;
C, according to pipe design parameter and service condition, determines the strain demand of oil and gas pipes;
D, the flexing strain capacity predict value of tube product should be not less than the strain demand of oil and gas pipes, to control the deformation failure pattern of oil and gas pipes.
Strain-aging be steel after cold plastic deformation, place at ambient temperature for a long time or heat a little, the phenomenon that its mechanical property changes, generally include yield strength and raise, yield tensile ratio increases, and plasticity and toughness reduce.This is because the solute constituent element of steel (as C, atom N) is by diffusion segregation around dislocation, form Ke Shi (Cottrell) air mass, cause dislocation motion difficulty, yield strength is raised.The second west to east gas pipeline project pipeline adopts 3PE to carry out outer anticorrosion, the strain-aging that its corrosion control relates to welded tube controls: X80 welded tube intensity is higher, strain-aging is there is when the strain that tubulation forming process produces can make to apply anticorrosive coat at 250 DEG C of temperature, the yield strength of welded tube is caused to rise, yield tensile ratio raises, and thus affects the security of its deformability and pipeline.
Along with the rising of aging temp and the prolongation of aging time, the tensile strength of X80 steel pipe and yield strength show different variation tendencies, and significant change does not occur tensile strength, and yield strength significantly rises.According to this project result, in the second west to east gas pipeline project pipework, the heating-up temperature of regulation corrosion prevention operation is lower than 200 DEG C, and the 3PE external corrosion prevention paint that development is suitable for, develops corresponding coated technique.
4, when failure mode, when corroding relevant strain-aging failure mode, determines Failure Control measure by the following method:
B1, the horizontal timeliness tensile property after being on active service by manual simulation's ag(e)ing test determination steel pipe and ballistic work and longitudinal timeliness tensile property;
B2, the horizontal timeliness tensile property of tube product and ballistic work and longitudinal timeliness tensile property should meet tube product inspection specifications, to control the corrosion failure because steel pipe timeliness causes.
By adopting technique scheme disclosed by the invention, obtain effect useful as follows: the present invention is based on fail message case library, comprehensive analysis conduit service condition, determine dominant failure mode and its failure mechanism and reason are studied, the control measure of pipeline dominant failure mode are planned to build in final proposition, thus avoid the contingent failure event of pipeline.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should look protection scope of the present invention.
Claims (7)
1. an oil and gas pipes Failure Control method, is characterized in that, based on oil and gas pipes fail message case library and the service condition planning to build pipeline, integratedly propose oil and gas pipes dominant failure mode, the method comprises:
S1, collects oil and gas pipes inefficacy case both domestic and external, sets up oil and gas pipes fail message database;
S2, carries out comprehensive statistics analysis to the inefficacy case stored in database, on the basis of service condition of planning to build pipeline, determines the failure mode of oil and gas pipes;
S3, studies the occurrence cause of failure mode, mechanism and influence factor;
S4, proposes the control measure of the above-mentioned failure mode of reply.
2. method according to claim 1, it is characterized in that, in step S2, large data analysis is carried out to oil and gas pipes fail message database, determine and plan to build pipeline service condition and the inefficacy case of specifications parameter comprehensive similarity more than 80%, using the set of its failure mode as the Failure Control target planning to build oil and gas pipes.
3. method according to claim 1, it is characterized in that, described in step S3, failure mode mainly comprises: dynamically ductile fracture failure mode, black brittleness fracture failure pattern, strain failure mode, the relevant strain-aging failure mode of corrosion.
4. method according to claim 3, is characterized in that, in step S3, when failure mode is dynamic ductile fracture failure mode, determine Failure Control measure by the following method:
Adopt Battelle hyperbolic method determination gas pipe line dynamic ductile fracture arrest toughness index, or determine gas pipe line dynamic ductile fracture arrest toughness index, using this toughness index as tube product acceptance condition by the test of pipeline full-scale gas blast.
5. method according to claim 3, is characterized in that, in step S3, when failure mode is black brittleness fracture failure pattern, determine Failure Control measure by the following method:
A1, definitely surface pressure pipeline configuration pattern and operating condition;
A2, calculates the numerical value of pipeline minimum wall temperature;
A3, analyzes the pipeline minimum wall temperature under stopping transportation pressurize operating mode;
A4, using pipeline minimum wall temperature as pipe design temperature;
A5, determines the anti-low-temperature brittle fracture toughness index of steel pipe or pipe fitting;
A6, Control experiment temperature is not less than pipe design temperature, using the Product Acceptance Review condition of anti-low-temperature brittle fracture toughness index as steel pipe or pipe fitting.
6. method according to claim 3, is characterized in that, in step S3, when failure mode is strain failure mode, determines Failure Control measure by the following method, comprising:
A, high-grade pipe strain capacity predict model: on the basis of pipeline strain limit prediction theory and method, set up high-strength line-pipe steel plastic anisotropy constitutive model and high-strength line-pipe steel pipe flexing strain forecast model, prediction pipeline flexing answers varying capacity;
B, carries out the full-scale flexural deformation test of high-pressure large-caliber pressurized tube, checking steel pipe flexing strain capacity predict model;
C, according to pipe design parameter and service condition, determines the strain demand of oil and gas pipes;
D, the flexing strain capacity predict value of tube product should be not less than the strain demand of oil and gas pipes, to control the deformation failure pattern of oil and gas pipes.
7. method according to claim 3, is characterized in that, in step S3, when failure mode is the relevant strain-aging failure mode of corrosion, determines Failure Control measure by the following method:
B1, the horizontal timeliness tensile property after being on active service by manual simulation's ag(e)ing test determination steel pipe and ballistic work and longitudinal timeliness tensile property;
B2, the horizontal timeliness tensile property of tube product and ballistic work and longitudinal timeliness tensile property should meet tube product inspection specifications, to control the corrosion failure because steel pipe timeliness causes.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112668182A (en) * | 2020-12-28 | 2021-04-16 | 西安特种设备检验检测院 | Analysis method for failure of natural gas long-distance pipeline |
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2015
- 2015-10-29 CN CN201510717745.4A patent/CN105260950A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 屈德强: ""基于应变设计的高钢级管线钢管应变性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 李鹤林: ""油气管道失效控制技术"", 《油气储运》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112668182A (en) * | 2020-12-28 | 2021-04-16 | 西安特种设备检验检测院 | Analysis method for failure of natural gas long-distance pipeline |
| CN112668182B (en) * | 2020-12-28 | 2022-01-28 | 西安特种设备检验检测院 | Analysis method for failure of natural gas long-distance pipeline |
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Application publication date: 20160120 |