CN202152925U - On-line leakage point detection device for internal coating of metal pipeline - Google Patents
On-line leakage point detection device for internal coating of metal pipeline Download PDFInfo
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- CN202152925U CN202152925U CN2011202641577U CN201120264157U CN202152925U CN 202152925 U CN202152925 U CN 202152925U CN 2011202641577 U CN2011202641577 U CN 2011202641577U CN 201120264157 U CN201120264157 U CN 201120264157U CN 202152925 U CN202152925 U CN 202152925U
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- sealing plate
- pipeline
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- ground electrode
- leak source
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Abstract
An on-line leakage point detection device for an internal coating of a metal pipeline is used for leakage point detection of internal coatings of oil transportation pipelines and water injection pipelines in an oil field, and adopts the structure that an annular first seal plate is arranged on the inner wall of an organic coating and sealed with the organic coating, a leakage point detector and a battery pack are mounted in a casing, a supporting and positioning part and a log wheel are fixed on the casing, and a measuring electrode is fixed at the front end of the leakage point detector; a first grounding electrode penetrates the first seal plate; a second grounding electrode is fixed on a second seal plate and connected with a data record alarm and a pipeline main body through a lead wire; and a liquid feeding pipeline is fixed on the second seal plate connected with a booster pump and a liquid storage tank. The utility model has the benefits that on-line all-section leakage point detection for coatings of long-distance buried pipelines, such as the oil transportation pipelines in the oil field, the water injection pipelines and the like, of which the internal coatings are subjected to integral on-line preservative treatment, is realized, and the method of external measurement adopted by most traditional coating leakage point detectors is changed.
Description
Technical field
The utility model relates to the undercoating leak source detection technique field of oil field petroleum pipeline, waterflood-transmission line, particularly a kind of internally coated detection device.
Background technique
Pipeline is the topmost oil gas aqueous medium of an oil gas field mode of movement, and the safe transport of pipeline concerns the normal operation in oil field.When oil transportation, filling pipe putting into operation for a long time the back since factor such as fed sheet of a media corrosion when causing pipeline corrosion, inwall attenuate or in before new pipeline puts into operation, can adopting antiseptic mode reach the purpose of pipeline reparation or enhancing.
Can adopt at present a kind of online in the interior preservative treatment mode of squeezing and coating carry out the reparation and the enhancing work of pipeline inwall, the pipeline operation of internally coated quality after for interior preservative treatment has fundamental influence.Because what adopt is the online interior preservative treatment of integral body (several kilometers or tens kilometers) of pipeline, but does not have effective undercoating quality online test method.
The coating leak source is a coating quality parameter of outbalance, and mostly conventional coating leak source detector is to adopt externally measured mode, even if carrying out pipeline coating when measuring, existing instrument is the short distance of energy measurement only also.When measuring distance was longer, the cable that connection detector and external ground point are used for constituting the testing circuit loop just needed to increase a lot.In pipeline distance very long (surpassing 2km), pipeline rout bending and radius of curvature during less than 190cm, the situation of connection detector and the cable bad connection of external ground point takes place in regular meeting, even the discovery leak source also can't form circuit loop and measure out.Rely on original detection facility; If need carry out cephalocaudal whole tube section coating leak source to the pipeline section of one section longer distance detects; Then mean and to prepare an elastic cable paper suitable, then can cause the complexity that increases resistance limit value, frictional force and increased measuring system with length of pipe section.With a varied topography and distance is when long in pipe laying, and this metering system then more can't be realized.
Some pipeline coating machines that exist at present can be carried out defective observation and coating thickness measuring in pipeline.Patent of invention---automatically detecting machine for antirust coating in pipeline (200910020481.1); Its detection to holiday is the mode through built-in cameras view; And being naked eyes, some holiday can not observe; And only be applicable to caliber greater than the pipeline of Φ more than 219, it detects distance and is no more than 1.5km." patch-up-coating machine capable of automatically examination inner wall coating or steel pipeline " (91107953.X) its function is more, can realize the coating after the defects detection, but be only applicable to caliber equally greater than the pipeline of Φ more than 219, and it is shorter to detect distance.
The model utility content
The purpose of the utility model is: provide a kind of metallic conduit internally coated leak source on-line measuring device, to the oil field petroleum pipeline, waterflood-transmission line is isometric carries out carrying out the online detection of coating integrity after the whole online undercoating preservative treatment apart from buried pipeline.
The technological scheme that the utility model adopts is: the internally coated leak source on-line measuring device of metallic conduit; Mainly by leak source detector, potential electrode, battery pack, first sealing plate, conductive liquid, first ground electrode, the wheel of having the records of distance by the log, support positioning element, second ground electrode, data logging alarm, second sealing plate, compression pump, liquid container and shell form; One deck organic coating is arranged in pipeline body; It is characterized in that: on the inwall of organic coating and with organic coating, seal at circular first sealing plate; Leak source detector and be installed in the shell for the leak source detector provides the battery pack of measuring required electric energy; On the middle leading portion outer wall of shell, evenly be fixed with the support positioning element, be in the center portion of pipeline to guarantee in moving process whole measuring system.Be fixed with the wheel of having the records of distance by the log on the middle part outer wall of shell, the wheel of having the records of distance by the log comes measurement line length and the measured position of record when measuring leak source.Potential electrode is fixed on the front end of leak source detector, and potential electrode adopts annular detect probe, and the outer wall of potential electrode contacts with the organic coating inwall; The diameter of potential electrode can be changed according to the caliber of pipeline to be detected.In the rear end of shell first ground electrode is arranged, first ground electrode passes first sealing plate; On the end of pipeline body and the inwall at organic coating, be fixed with second sealing plate, second sealing plate seals with between the organic coating inwall.Be fixed with second ground electrode on second sealing plate; Second ground electrode connects the data logging alarm through lead, and second ground electrode is through the outer wall of lead connecting tube body; On second sealing plate, be fixed with the feed liquor pipeline, the other end of feed liquor pipeline connects the pressurization delivery side of pump, and the import of compression pump connects liquid container through pipeline; Compression pump can pump into the liquid in the liquid container first sealing plate with in the space between second sealing plate.During measurement, owing between first ground electrode and second ground electrode conductive liquid is arranged, testing signal passes to second ground electrode through conductive liquid forming circuit loop from first ground electrode.
The detection principle of the internally coated leak source on-line measuring device of summary metallic conduit.Consult Fig. 1.Coating leak source on-line detector is to drive walking through by the outer compression pump 14 of pipe the conductive liquid in the liquid container 15 7 being injected first sealing plate 6 that promotes to be connected with measuring system through the water filling hole on measured entrance place second sealing plate 13 in pipeline.First sealing plate 6 fits tightly the organic coating 3 with tested tube wall, passes first sealing plate 6 by first ground electrode 8 in the measuring system.When the conductive liquid of injecting 7 is advanced with the promotion whole system on active force and first sealing plate 6 during in pressurised driving.First sealing plate, 6 another important function are to prevent that conductive liquid 7 from contacting with surveying instrument and produce short circuit, avoids false alarm.Conductive liquid 7 has replaced traditional measurement cable to form the closed-loop path as the ground wire in the measuring system.
The detected leak source situation and the wheel 9 measured pipelines of having the records of distance by the log are apart from the data logging alarm 12, the warning when carrying out detection of electrical leakage and the record of data that wait numerical value data transmission extremely to be linked to each other with second ground electrode 11 as signal path through conductive liquid 7.Its measuring phase is that the voltage that battery pack 5 provides passes potential electrode 2 and can jump when potential electrode 2 contacts with organic coating 3 leak sources, passes leak source and arrives pipeline body 4; Then arrive first ground electrode 8; In case electric current arrives second ground electrode 11, conductive liquid 7 produces a closed-loop path, makes electric current flow back to leak source detector circuit again; Thereby when leak source occurs, produce a voltage puncture reaching the purpose of alarm indication, and alarm signal is sent to data logging alarm 12.
What described conductive liquid adopted is salt solution, when in water, adding some affix, can be used as conductive liquid, and water price is honest and clean is easy to get, pollution-free, can not exert an influence to testing conduit.Through the amount that changes affix in the aqueous solution can be more or less freely the variation of controlling resistance rate, the basis that the aqueous solution can be used as in this measuring system connects.The specific resistance of conductive liquid and conductivity can be through regulating; Then can calculate the resistance value of the conductive liquid that is full of the certain-length pipeline section with pipeline (or conductive liquid section) length by known cross-section of pipeline is long-pending, such mode can guarantee signal intensity and the degree of accuracy that signal transmits.Reach the purpose that " no cable " mode is measured.Traditional testing apparatus need constitute the loop through cable when testing, when needs were grown the measurement of distance, cable then needed corresponding the prolongation.
The beneficial effect of the utility model: the internally coated leak source on-line measuring device of the utility model metallic conduit; Can detect the isometric online whole tube section that after carrying out whole online undercoating preservative treatment, carries out the coating leak source apart from buried pipeline of oil field petroleum pipeline, waterflood-transmission line and detect, guarantee coating construction quality and coating integrity.Solved existing pipeline coating quality testing and can't realize the online interior problem that detects of long distance, changed traditional coating leak source detector and be mostly to adopt externally measured mode.
Description of drawings
Fig. 1 is the detection architecture schematic representation of the internally coated leak source on-line measuring device of the utility model metallic conduit.
Among the figure, 1-leak source detector, 2-potential electrode, 3-organic coating, 4-pipeline body; The 5-battery pack, 6-seal arrangement, 7-conductive liquid, 8-first ground electrode; The 9-wheel of having the records of distance by the log, 10-supports positioning element, 11-second ground electrode, 12-data logging alarm; The 13-sealing plate, 14-compression pump, 15-liquid container, the shell of 16-measuring system.
Embodiment
Embodiment 1: with an internally coated leak source on-line measuring device of metallic conduit is example, and the utility model is done further explain.
Consult Fig. 1.The internally coated leak source on-line measuring device of the utility model metallic conduit, mainly by leak source detector 1, potential electrode 2, battery pack 5, first sealing plate 6, conductive liquid 7, first ground electrode 8, the wheel 9 of having the records of distance by the log, support positioning element 10, second ground electrode 11, data logging alarm 12, second sealing plate 13, compression pump 14, liquid container 15 and shell 16 and form.One deck organic coating 3 is arranged in pipeline body 4.
Circular first sealing plate 6 on the inwall of organic coating 3 and with organic coating 3 sealing, leak source detector 1 and be installed in the shell 16 for leak source detector 1 provides the battery pack 5 of measuring required electric energy.On the middle leading portion outer wall of shell 16, evenly be fixed with and support positioning element 10, be fixed with the wheel 9 of having the records of distance by the log on the middle part outer wall of shell 16.Potential electrode 2 is fixed on the front end of leak source detector 1, and potential electrode 2 adopts annular detect probe, and the outer wall of potential electrode 2 contacts with organic coating 3 inwalls.There are first ground electrode, 8, the first ground electrodes 8 to pass first sealing plate 6 in the rear end of shell 16.In the end of pipeline body 4 and be fixed with on the inwall of organic coating 3 between second sealing plate, 13, the second sealing plates 13 and organic coating 3 inwalls and seal.Be fixed with one second ground electrode 11 on second sealing plate 13.Second ground electrode 11 connects the outer wall of data logging alarm 12, the second ground electrodes 11 through lead connecting tube body 4 through lead.Between first sealing plate 6 and second sealing plate 13 conductive liquid 7 is arranged, what described conductive liquid 7 adopted is salt solution.On second sealing plate 13, be fixed with a feed liquor pipeline, the other end of feed liquor pipeline connects the outlet of compression pump 14, and the import of compression pump 14 connects liquid container 15 through pipeline.
Claims (2)
1. internally coated leak source on-line measuring device of metallic conduit; Mainly form by leak source detector (1), potential electrode (2), battery pack (5), first sealing plate (6), conductive liquid (7), first ground electrode (8), the wheel (9) of having the records of distance by the log, support positioning element (10), second ground electrode (11), data logging alarm (12), second sealing plate (13), compression pump (14), liquid container (15) and shell (16); One deck organic coating (3) is arranged in pipeline body (4); It is characterized in that: circular first sealing plate (6) seals on the inwall of organic coating (3) and with organic coating (3); Leak source detector (1) and be installed in the shell (16) for leak source detector (1) provides the battery pack (5) of measuring required electric energy; On the middle leading portion outer wall of shell (16), evenly be fixed with and support positioning element (10); Be fixed with the wheel (9) of having the records of distance by the log on the middle part outer wall of shell (16); Potential electrode (2) is fixed on the front end of leak source detector (1), and potential electrode (2) adopts annular detect probe, and the outer wall of potential electrode (2) contacts with organic coating (3) inwall; In the rear end of shell (16) first ground electrode (8) is arranged, first ground electrode (8) passes first sealing plate (6); In the end of pipeline body (4) and on the inwall of organic coating (3), be fixed with second sealing plate (13), seal between second sealing plate (13) and organic coating (3) inwall, be fixed with second ground electrode (11) on second sealing plate (13); Second ground electrode (11) connects data logging alarm (12) through lead, and second ground electrode (11) is through the outer wall of lead connecting tube body (4); Between first sealing plate (6) and second sealing plate (13) conductive liquid (7) is arranged, on second sealing plate (13), be fixed with the feed liquor pipeline, the other end of feed liquor pipeline connects the outlet of compression pump (14), and the import of compression pump (14) connects liquid container (15) through pipeline.
2. the internally coated leak source on-line measuring device of metallic conduit according to claim 1 is characterized in that: what described conductive liquid (7) adopted is salt solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202641577U CN202152925U (en) | 2011-07-25 | 2011-07-25 | On-line leakage point detection device for internal coating of metal pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202641577U CN202152925U (en) | 2011-07-25 | 2011-07-25 | On-line leakage point detection device for internal coating of metal pipeline |
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| CN202152925U true CN202152925U (en) | 2012-02-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202641577U Expired - Lifetime CN202152925U (en) | 2011-07-25 | 2011-07-25 | On-line leakage point detection device for internal coating of metal pipeline |
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| CN (1) | CN202152925U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345077A (en) * | 2013-07-31 | 2015-02-11 | 上海图博可特石油管道涂层有限公司 | Detecting device for coating leakage points in petroleum pipe and detecting method |
| CN104567914A (en) * | 2013-10-24 | 2015-04-29 | 上海佳友市政建筑有限公司 | Pipeline track instrument provided with novel logging wheel |
| CN105239995A (en) * | 2015-09-25 | 2016-01-13 | 中国石油天然气股份有限公司 | Three-electrode potential difference type detection method for inner coating of tubing and casing in downhole |
| CN107402233A (en) * | 2017-07-12 | 2017-11-28 | 温州职业技术学院 | A kind of Photoelectric Detection warning device of submarine pipeline |
| CN108562619A (en) * | 2018-03-28 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of down-hole casing inner coating quality detection device and detection method |
| CN109488889A (en) * | 2018-11-09 | 2019-03-19 | 上海金艺检测技术有限公司 | The online test method of in-service metallic conduit insulated liner layer status |
| CN110906897A (en) * | 2019-12-16 | 2020-03-24 | 唐山盈和瑞环保设备有限公司 | Online quality tester for anticorrosive coating of steel plate |
| CN111122798A (en) * | 2020-01-20 | 2020-05-08 | 胡志伟 | Nondestructive testing equipment for coatings on inner and outer walls of metal pipe |
-
2011
- 2011-07-25 CN CN2011202641577U patent/CN202152925U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345077A (en) * | 2013-07-31 | 2015-02-11 | 上海图博可特石油管道涂层有限公司 | Detecting device for coating leakage points in petroleum pipe and detecting method |
| CN104567914A (en) * | 2013-10-24 | 2015-04-29 | 上海佳友市政建筑有限公司 | Pipeline track instrument provided with novel logging wheel |
| CN105239995A (en) * | 2015-09-25 | 2016-01-13 | 中国石油天然气股份有限公司 | Three-electrode potential difference type detection method for inner coating of tubing and casing in downhole |
| CN105239995B (en) * | 2015-09-25 | 2018-02-02 | 中国石油天然气股份有限公司 | A kind of internally coated three electrode potentials differential detection method of tube and casing in downhole |
| CN107402233A (en) * | 2017-07-12 | 2017-11-28 | 温州职业技术学院 | A kind of Photoelectric Detection warning device of submarine pipeline |
| CN107402233B (en) * | 2017-07-12 | 2024-03-05 | 温州职业技术学院 | Photoelectric detection alarm device for submarine pipeline |
| CN108562619A (en) * | 2018-03-28 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of down-hole casing inner coating quality detection device and detection method |
| CN108562619B (en) * | 2018-03-28 | 2021-01-29 | 中国石油天然气股份有限公司 | Detection device and detection method for coating quality in underground casing |
| CN109488889A (en) * | 2018-11-09 | 2019-03-19 | 上海金艺检测技术有限公司 | The online test method of in-service metallic conduit insulated liner layer status |
| CN110906897A (en) * | 2019-12-16 | 2020-03-24 | 唐山盈和瑞环保设备有限公司 | Online quality tester for anticorrosive coating of steel plate |
| CN111122798A (en) * | 2020-01-20 | 2020-05-08 | 胡志伟 | Nondestructive testing equipment for coatings on inner and outer walls of metal pipe |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120229 |
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| CX01 | Expiry of patent term |