CN106383084B - A kind of on-site testing device of full angle detection oil-gas pipeline inner wall corrosion - Google Patents
A kind of on-site testing device of full angle detection oil-gas pipeline inner wall corrosion Download PDFInfo
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- CN106383084B CN106383084B CN201610751407.7A CN201610751407A CN106383084B CN 106383084 B CN106383084 B CN 106383084B CN 201610751407 A CN201610751407 A CN 201610751407A CN 106383084 B CN106383084 B CN 106383084B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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Abstract
A kind of on-site testing device of full angle detection oil-gas pipeline inner wall corrosion,Including first flange,Second flange,Substrate,Baffle ring,Lacing film,Dismantle counterbore,Base tube,Described device is cylinder structure,Base tube both ends are respectively first flange and second flange,There are 12 flange fixing ports on flange,Device can be connected in live pipeline of oil production,The base tube can be fitted around 10 lacing films,Lacing film is embedded at the surface exposure to be tested of the trapezoidal end faces in substrate and lacing film in the trapezoidal end faces,Annular base plate internal diameter after installing lacing film is equal with live pipeline internal diameter,It can be under conditions of pipe flow field not be changed,Test the corrosion condition of 360 degree of annular space different locations,Substrate both ends are respectively boss rank and recessed stepped form,Each substrate can be enable mutually to be fitted and fixed with,4 annular base plates can be loaded in base tube,Primary experiment can place 40 sections of jurisdiction,There are 4 old holes of dismounting of omnidirectional distribution on each substrate,Substrate can be taken out conveniently,Baffle ring is mounted at second flange,To fixed substrate.The detection device overcomes the deficiency of existing lacing film corrosion device, can meet Corrosion monitoring actual requirement, and installation is simple, convenient.
Description
Technical field
The present invention relates to a kind of live corrosion testing devices, belong to chemical analysis technology field, and in particular to one kind is used for
The device of oil gas field scene Corrosion monitoring.
Background technology
Contain CO for reservoir2And CO2/H2The operating mode that S coexists, experimental study be awareness and understanding system corrosion factor,
Formulate anti-corrosion measure, the basis for selecting reasonable pipe material.In order to more comprehensive and accurate detect the corrosion condition of pipeline, state
It is inside and outside generally to be tested using the method for suspension corrosion coupon.Consider that underground working is complicated, corrosion coupon is hung in order to prevent
Part fails in pit shaft, causes fish, influences oil/gas well normal production operation, should be near well head, before sustained release agent betting
Flow on test, detect the practical corrosion condition of downhole well fluid, while temperature, pressure and flow velocity for recording test point etc..
Corrosion coupon is sheet metal block, and material can be identical with main process pipelines or other needs assessments
Material.Live corrosion testing device for the purpose of evaluating pipe material should meet following requirement：1) test period is longer, and 2) energy
Enough corrosion coupons for hanging various material simultaneously, 3) for same material, multiple parallel samples can be hung, 4) hang corrosion
Piece is consistent with the contact situation of pipeline and fluid reality with the contact form of corrosive medium, and 5) installation corrosion coupon hangs on pipeline
Internal diameter of the pipeline cannot be generated after hang device and significantly affected, do not change the flow velocity and fluidised form of fluid.
The corrosion coupon suspension arrangement used both at home and abroad at present mainly includes being threadedly coupled suspender, flange suspender, band
Press reassembling type suspender and extension type suspender.Suspender and flange suspender are threadedly coupled in installation and removal corrosion coupon
When need stopping transportation pressure release, applicable situation is relatively fewer.And reassembling type suspender with pressure and extension type suspender are widely used in
Long-term continuous operation, it is impossible to the occasion of halt production pressure release easily.
Reassembling type suspender with pressure is by parts such as protective cover, cock-type fastener, high pressure bearing base, corrosion coupon stents
Composition.In use, corrosion coupon is fixed on above corrosion coupon stent, then will be with standoff cock-type fastener
It is fixed on high pressure bearing base.Cock-type fastener is in addition to that can fix corrosion coupon stent, moreover it is possible to play the role of sealing.
It is finally installation protective cover.The corrosion coupon suspender can be realized in supervisor by the tool of a set of similar press and open holes
Corrosion coupon is mounted and dismounted in the case of on-line production.Advantage is that lacing film can contact the corrosive medium identical with pipeline；It can
Realize installation and removal corrosion coupon with pressure.Shortcoming is that installation is complicated, needs, to pipeline trepanning, to weld pedestal, need similar
The upgrade kit of press and open holes matches；Clamping corrosion coupon negligible amounts, once only 2 corrosion coupons of clamping；It cannot adjust
Save the depth of setting of lacing film.
Extension type lacing film stent includes ball valve, lacing film storehouse, relief valve, sealed screw and safe flashboard etc..It will during use
Pipeline processing is asked to have high-pressure chassis and connection short circuit.Peace with pressure can be realized by valve and sealing device, the relief valve of itself
Dress replaces corrosion coupon, and can adjust direction of the corrosion coupon in fluids within pipes.In use, first will
The suspender is mounted on the bearing base on supervisor, then corrosion coupon is suspended on stent and is put into lacing film storehouse, is closed
Relief valve opens ball valve, and the stent equipped with corrosion coupon is sent into supervisor, starts to test.After experiment, it will hang first
Plate rack end is promoted into lacing film storehouse, is then shut off ball valve, opens relief valve, and the fluid in lacing film storehouse is released, then opens
Corrosion coupon is taken out in lacing film storehouse.
To sum up, there are the following problems for existing lacing film suspension arrangement：1) it needs the trepanning on pipeline and high-pressure chassis is installed, no
Convenient for field operation；2) single clamping lacing film negligible amounts, can not the multiple parallel samples of clamping, it is difficult to complete to exist to various material
The experimental evaluation of longer cycle；3) form of lacing film and tube contacts corrosive medium has significant difference, is commented with carrying out pipe material selecting
The requirement of experiment of valency is not inconsistent；If 4) pipeline internal medium is more sticky, the intensity of lacing film stent is difficult to meet the requirements；5) it is being linked into pipeline
Later, it substantially change internal diameter of the pipeline, so as to generate large effect to the flow velocity and fluidised form of fluid, it is impossible to true reflection
The practical corrosion condition of pipeline；6) lacing film can not in the duct 360 degree around insertion, different vertical positions can not be obtained in pipeline
The corrosion condition put, its vertical corrosion condition is different during fluid flowing in pipeline, thus the dress of existing evaluation corrosion
Putting can not overcome the problems, such as that this is important.
Invention content
The present invention is not easy to execute-in-place for current hanging film scene suspension arrangement, is unable to the multiple lacing films of single clamping, extension
The form of piece and tube contacts corrosive medium has significant difference, substantially change internal diameter of the pipeline and influences fluid flow velocity and
The problems such as fluidised form, for the purpose of pipe material selects, contact feature of the analysis conduit with corrosive medium devises a kind of convenient for existing
Operation, it is safe and reliable, can single hang multiple corrosion coupons, corrosion coupon single-contact corrosive medium, access for a long time
The full angle detection oil-gas pipeline inner wall for not changing internal diameter of the pipeline, the flow velocity for not influencing fluids within pipes and fluidised form after pipeline is rotten
The on-site testing device of erosion.
The on-site testing device of a kind of full angle detection oil-gas pipeline inner wall corrosion, including first flange, second flange, the
One flange fixing port, second flange fixing port, the first o-ring groove, the second o-ring groove, flange groove, baffle ring, baffle ring
Step, base tube, lacing film, it is characterised in that：First flange is connectable to second flange in live pipeline of oil production, passes through first
Flange fixing port and second flange fixing port are fixed in pipeline of oil production, and in the first o-ring groove and the second o-ring groove
Middle loading circular seal ring sealing, first annular substrate, the second annular base plate, third annular base plate and fourth annular substrate are
Identical structure, first annular substrate both ends are first annular substrate boss rank and first annular substrate concave station rank, in first flange
In have flange groove, flange groove can be mutually fitted and fixed with first annular substrate boss rank, and the second annular base plate both ends are
Second annular base plate boss rank and the second annular base plate concave station rank, the second annular base plate boss rank and first annular substrate concave station rank
Mutually be fitted and fixed with, third annular base plate both ends be third annular base plate boss rank and third annular base plate concave station rank, third ring
Shape substrate boss rank and the second annular base plate concave station rank are mutually fitted and fixed with, and fourth annular substrate both ends are convex for fourth annular substrate
Step and fourth annular substrate concave station rank, fourth annular substrate boss rank and third annular base plate concave station rank are mutually fitted and fixed with,
Baffle ring is installed at second flange, and one end is contacted with fourth annular substrate concave station rank, and other end baffle ring step hangs over the second method
In blue groove, first annular substrate, the second annular base plate, third annular base plate and fourth annular substrate are the base of same structure
Plate, the 4 dismounting counterbores and equally distributed 10 lacing film installing ports, lacing film for having omnidirectional distribution in each substrate are installed to extension
At piece installing port.
Identical with second flange fixing port just like first flange fixing port 12 of the first flange and second flange
Flange fixing port, and be uniformly surrounded in annular flange, for being fixed in pipeline of oil production.
There is a flange groove on the inside of the first flange.
The first annular substrate, the second annular base plate, third annular base plate, fourth annular substrate are with identical structure
Substrate, have equally distributed 10 lacing film installing ports, and the dismounting for having 4 omnidirectional distributions is sunk in each of which annular base plate
Hole, can be with substrate easy to disassemble.
Internal diameter and the oil recovery of the first annular substrate, the second annular base plate, third annular base plate and fourth annular substrate
Pipeline internal diameter is equal, does not change the flow velocity and fluidised form of fluid in pipeline.
The lacing film installing port is trapezium structure, and the lacing film installation open area on the inside of substrate is small, the lacing film peace on the outside of base tube
It is big to fill open area.
The lacing film is trapezium structure, and trapezoidal size can just be embedded into lacing film installing port, then be loaded into extension
One layer is smeared with silica column on the outside of the lacing film installing port of piece, so as to fix and be sealed in lacing film installing port lacing film.
Lacing film can be installed with 360 degree around substrate, and full angle oil gas corrosion test can be carried out to oil-gas pipeline, so as to
To the corrosion condition of pipeline different location, corrosion data can be accurately obtained.
Description of the drawings
Fig. 1 is the on-site testing device structure diagram that full angle of the present invention detects oil-gas pipeline inner wall corrosion；
Fig. 2 is the on-site testing device sectional view that full angle of the present invention detects oil-gas pipeline inner wall corrosion；
Fig. 3 is the on-site testing device board structure schematic diagram that full angle of the present invention detects oil-gas pipeline inner wall corrosion；
Fig. 4 is the on-site testing device substrate side view that full angle of the present invention detects oil-gas pipeline inner wall corrosion；
Fig. 5 is the on-site testing device substrate sectional view that full angle of the present invention detects oil-gas pipeline inner wall corrosion；
Fig. 6 is the on-site testing device lacing film vertical view that full angle of the present invention detects oil-gas pipeline inner wall corrosion；
Fig. 7 is the on-site testing device baffle ring sectional view that full angle of the present invention detects oil-gas pipeline inner wall corrosion；
Fig. 8 is the on-site testing device second flange sectional view that full angle of the present invention detects oil-gas pipeline inner wall corrosion,
Fig. 9 is the on-site testing device first flange sectional view that full angle of the present invention detects oil-gas pipeline inner wall corrosion.
Specific embodiment
A kind of on-site testing device of full angle detection oil-gas pipeline inner wall corrosion, including first flange 1, second flange 2,
First flange fixing port 3, second flange fixing port 4, the first o-ring groove 5, the second o-ring groove 6, flange groove 7, gear
Circle 24, baffle ring step 25, base tube 26, lacing film 28, first flange 1 are connectable to second flange 2 in live pipeline of oil production, are led to
It crosses first flange fixing port 3 and second flange fixing port 4 is fixed in pipeline of oil production, and in the first o-ring groove 5 and second
Circular seal ring sealing, first annular substrate 8, the second annular base plate 9,10 and of third annular base plate are packed into o-ring groove 6
Fourth annular substrate 11 is identical structure, and first annular 8 both ends of substrate are first annular substrate boss rank 12 and first annular
Substrate concave station rank 13, there is flange groove 7 in first flange 1, and flange groove 7 can be mutual with first annular substrate boss rank 12
Be fitted and fixed with, 9 both ends of the second annular base plate be the second annular base plate boss rank 14 and the second annular base plate concave station rank 15, the second ring
Shape substrate boss rank 14 and first annular substrate concave station rank 13 are mutually fitted and fixed with, and 10 both ends of third annular base plate are third annular
Substrate boss rank 16 and third annular base plate concave station rank 17, third annular base plate boss rank 16 and the second annular base plate concave station rank 15
Mutually be fitted and fixed with, 11 both ends of fourth annular substrate be fourth annular substrate boss rank 18 and fourth annular substrate concave station rank 19,
Fourth annular substrate boss rank 18 and third annular base plate concave station rank 17 are mutually fitted and fixed with, and baffle ring 24 is installed to second flange 2
Place, one end are contacted with fourth annular substrate concave station rank 19, and other end baffle ring step 25 is hung in 2 groove of second flange, and first
The substrate of annular base plate 8, the second annular base plate 9, third annular base plate 10 and fourth annular substrate 11 for same structure, Mei Geji
The 4 dismounting counterbores 30 and equally distributed 10 lacing film installing ports 27, lacing film 28 for having omnidirectional distribution in plate are installed to lacing film
At installing port 27.
The first flange 1 and second flange 2 are identical just like first flange fixing port 3 and second flange fixing port 4
12 flange fixing ports, and be uniformly surrounded in annular flange, for being fixed in pipeline of oil production.
There is a flange groove 7 in 1 inside of first flange.
The first annular substrate 8, the second annular base plate 9, third annular base plate 10, fourth annular substrate 11 are with phase
Isostructural substrate has equally distributed 10 lacing film installing ports 27, and have the dismounting of 4 omnidirectional distributions in each of which substrate
Counterbore 30, can be with substrate easy to disassemble.
The lacing film installing port 27 is trapezium structure, and 27 area of lacing film installing port on the inside of substrate is small, the extension on the outside of base tube
27 area of piece installing port is big.
Lacing film 28 is trapezium structure, and trapezoidal size can just be embedded into lacing film installing port 27, then be loaded into extension
27 outside of lacing film installing port of piece 28 smears one layer with silica column, so as to fix and be sealed in lacing film installing port by lacing film 28
27。
Lacing film can be installed with 360 degree around substrate, and full angle oil gas corrosion test can be carried out to oil-gas pipeline, so as to
To the corrosion condition of pipeline different location, corrosion data can be accurately obtained.
Described device is installed at the scene, all surface of lacing film 28 is beaten step by step with 320#, 600#, 1000# sand paper successively
Mill, distilled water cleaning with acetone oil removing, weigh after dry, lacing film 28 are installed on first annular substrate 8, the second annular base plate 9
Lacing film installing port 27 in third annular base plate 10, fourth annular substrate 11, and on the outside of lacing film one layer is smeared with silica column
With fixed and sealing, then by first annular substrate 8, the second annular base plate 9, third annular base plate 10, fourth annular substrate 11
It is sequentially loaded into base tube 26, is mutually fitted and fixed with by substrate boss rank and substrate concave station rank, then install baffle ring 24 and the
Inside two flanges 2, for fixed substrate, the first o-ring groove 5 and the second sealing in first flange 1 and second flange 2
Circular seal ring is packed into circle groove 6, is then installed to whole device in the oil country tubular good to be tested, in flange fixing port
Flange is tightened by bolts, into corrosion test process, can be divided into experimental period 30 days, 90 days, 180 days, lacing film is taken out after experiment.
For calculating the lacing film of average corrosion rate, corrosive medium is washed away with distilled water, with cleaning solution (distilled water/dense salt
Sour (31%-38%) and 5% corrosion inhibiter) processing, it after wiping Product Films repeatedly with cotton swab, is cleaned with acetone, dries, microspur is taken to shine
Piece is simultaneously weighed, according to NACE (National Association of Corrosion Engineer, U.S. corrosion engineering teacher association
Meeting) RP0775-2005 regulation calculate sample average corrosion rate；Corrosion rate calculates method --- weight-loss method, passes through survey
The size of metal lacing film is measured, corrodes front and rear quality, and recording test time, then according to the corruption in NACE RP0775-2005
Erosion rate calculations formula is calculated：
In formula, CR --- corrosion rate, mm/y；
△ W --- the average weightlessness of parallel sample, that is, lacing film, g before and after corrosion；
The surface area of A --- corrosion coupon, mm2；
The density of D --- corrosion coupon, g/cm3；
T --- experimental period, day；
For carrying out the lacing film of SEM, EDS and XRD test, with distilled water immersion, corrosive medium is removed, then soaked with acetone
Bubble carries out above-mentioned three tests (including section SEM and EDS) after dry.
Claims (1)
1. a kind of on-site testing device of full angle detection oil-gas pipeline inner wall corrosion, including first flange, second flange, first
Flange fixing port, second flange fixing port, the first o-ring groove, the second o-ring groove, flange groove, baffle ring, baffle ring platform
Rank, base tube, lacing film, first annular substrate, the second annular base plate, third annular base plate and fourth annular substrate, wherein, the first ring
Shape substrate, the second annular base plate, third annular base plate and fourth annular substrate are sequentially loaded into base tube, first annular substrate,
Second ring substrate, third annular base plate and fourth annular substrate have identical structure, and base tube both ends are respectively first flange and the
Two flanges, first flange are fixed to pipeline of oil production by first flange fixing port and second flange fixing port respectively with second flange
In, loading circular seal ring is sealed in the first o-ring groove and the second o-ring groove, it is characterised in that：First ring
The both ends of shape substrate are first annular substrate boss rank and first annular substrate concave station rank, and it is recessed to be equipped with flange on the inside of first flange
Slot, flange groove are mutually fitted and fixed with first annular substrate boss rank, and the both ends of the second annular base plate are the second annular base plate
Boss rank and the second annular base plate concave station rank, the second annular base plate boss rank and first annular substrate concave station rank are mutually chimeric solid
Fixed, the both ends of third annular base plate are convex for third annular base plate boss rank and third annular base plate concave station rank, third annular base plate
Step and the second annular base plate concave station rank are mutually fitted and fixed with, the both ends of fourth annular substrate for fourth annular substrate boss rank and
Fourth annular substrate concave station rank, fourth annular substrate boss rank and third annular base plate concave station rank are mutually fitted and fixed with, baffle ring peace
It is attached at second flange, one end of baffle ring is contacted with fourth annular substrate concave station rank, and the baffle ring step of the other end hangs over the second method
In blue groove, 4 in each annular base plate equipped with omnidirectional distribution are dismantled counterbores, are equipped in each annular base plate equally distributed
10 lacing film installing ports, lacing film installing port are trapezium structure, and the lacing film installation open area on the inside of annular base plate is small, on the outside of substrate
Lacing film installation open area is big, and lacing film is trapezium structure, and trapezoidal size can just be embedded into lacing film installing port, be applied with silica column
It smears and is packed on the outside of the lacing film installing port of lacing film and lacing film is fixed and is sealed in lacing film installing port, the internal diameter of annular base plate and oil recovery
The internal diameter of pipeline is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610751407.7A CN106383084B (en) | 2016-08-30 | 2016-08-30 | A kind of on-site testing device of full angle detection oil-gas pipeline inner wall corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610751407.7A CN106383084B (en) | 2016-08-30 | 2016-08-30 | A kind of on-site testing device of full angle detection oil-gas pipeline inner wall corrosion |
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| CN106383084A CN106383084A (en) | 2017-02-08 |
| CN106383084B true CN106383084B (en) | 2018-06-26 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131428B (en) * | 2018-02-09 | 2020-12-01 | 中国石油天然气股份有限公司 | Valve device |
| CN111189764B (en) * | 2018-11-14 | 2022-12-20 | 中国石油化工股份有限公司 | Suspension device for corrosion hanging piece in pipeline |
| CN110567867A (en) * | 2019-10-12 | 2019-12-13 | 韦正楠 | device and method for integrating temperature and pressure of geothermal water with field real-time detection |
| CN112986112A (en) * | 2019-12-18 | 2021-06-18 | 观致汽车有限公司 | Test platform for reinforced corrosion test of whole vehicle and reinforced corrosion test method of whole vehicle |
| CN113281082A (en) * | 2021-05-21 | 2021-08-20 | 上海城市水资源开发利用国家工程中心有限公司 | Water cut-off pipeline biomembrane and growth ring collection device |
| CN114963021B (en) * | 2022-06-27 | 2024-04-26 | 四川岚强石油天然气工程勘察设计有限责任公司 | Corrosion monitoring and early warning device and method for gathering and transportation pipeline of high-sulfur-content gas field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7553449B2 (en) * | 2004-09-21 | 2009-06-30 | Exxonmobil Research & Engineering Company | Method of determination of corrosion rate |
| CN101482483B (en) * | 2009-02-05 | 2012-05-09 | 中国海洋石油总公司 | Corrosion detection apparatus in pipe and its use method |
| CN103604739B (en) * | 2013-12-03 | 2014-07-23 | 中国石油大学(北京) | Detection apparatus used for assisted evaluation of on-site corrosion of pipeline material |
| CN103728195B (en) * | 2014-01-15 | 2014-11-05 | 中国石油大学(华东) | Multiphase flow scouring corrosion simulation test device for rotary loop |
| CN105891100A (en) * | 2016-07-05 | 2016-08-24 | 天津亿利科能源科技发展股份有限公司 | Corrosion detecting method for petroleum pipeline without stopping production |
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