CN102172572A - Inner wall washing and coating corrosion resisting method for manifold pipelines in oil fields - Google Patents
Inner wall washing and coating corrosion resisting method for manifold pipelines in oil fields Download PDFInfo
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- CN102172572A CN102172572A CN201110062387XA CN201110062387A CN102172572A CN 102172572 A CN102172572 A CN 102172572A CN 201110062387X A CN201110062387X A CN 201110062387XA CN 201110062387 A CN201110062387 A CN 201110062387A CN 102172572 A CN102172572 A CN 102172572A
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Abstract
The invention discloses an inner wall washing and coating corrosion resisting method for manifold pipelines in oil fields, which relates to the technical field of cleaning and anticorrosion treatment of the manifold pipelines in oil fields. Based on an aerodynamic principle, the method first clean dust and scale on the inner walls of pipelines by using a physical process and then perform coating anticorrosion treatment on the inner walls of the pipelines; and the method has the characteristics of complete pipeline cleaning and durable coating. The construction length at one time is about 3 kilometers. A cyclostrophic flow-method pipeline inner wall cleaning and corrosion resisting technique can be widely used in new (old) manifold pipelines and water injection pipelines in oil fields, is expected to make an important breakthrough in the field of cleaning and corrosion resisting of pipelines in oil fields, can descale and resist corrosion of small-caliber pipelines and can fill the blank in the field of cleaning and corrosion resisting of the pipelines in oil fields.
Description
Technical field
The present invention relates to cleaning, the preservative treatment technology field in oilfield technology field, particularly oil field gathering and transportation pipeline.
Background technology
At present both at home and abroad, on principle, can be divided into two classes: i.e. physics method and chemical method to the scale removal in the pipeline, aseptic technic.Concrete have chemical method (pickling etc.), vibratory drilling method (ultrasonic wave etc.), electromagnetic method (electric shock, negative electrode, magnetization etc.), lining method (intert soft, hard tube liner) and a Mechanical Method (built-in tool, robot etc.).But can pigging can the corrosion-resistant technology mainly be two big class methods again: lining method and Mechanical Method.But these two big class methods have all run into the four problems that is difficult to overcome: pipeline is turned; Pipeline lightens; Pipeline is vertical; Small-bore pipeline.The air-flow rotary process has solved this four problems effectively.Can repair and improve into the technology of high-quality multiple tube to the in-service pipeline inwall of various uses.
The water flood recovery technology is one of domestic each elephant main method of improving oil recovery factor, and along with the growth of oilfield exploitation time, injection water quality constantly worsens, and corrodes seriously day by day, and the loss that causes makes us startling.Have in the waterflood-transmission line more than 90% is to scrap because of the burn into fouling.Each elephant of the whole nation amounts to up to rice surplus 1,500,000,000,1,500 hundred million yuan more than to loss in this respect in the end of the year 2008.
Clean in the oil field pipe of Jiangsu at present and be the physics cleaning: the PIG high-pressure water jet; Chemical cleaning: acid, alkali, table agent alive; Compound cleaning: physical chemistry combination.Pipeline internal corrosion mainly adopts the squeezing and coating formula.But adopt no matter above technology is that cleaning or interior anticorrosion being difficult to get a desired effect, often cause not thorough, the interior anticorrosive coating film of cleaning and descaling inhomogeneous.
Summary of the invention
The object of the invention is to study the thorough scale removal of a kind of energy, is formed uniformly the cleaning of oil field gathering and transportation pipeline inwall and the coating antiseptic method of interior anticorrosive coating film.
The present invention includes following steps:
1) blows out foreign material in the oil field gathering and transportation pipeline with compressed air;
2) mix with water with compressed air oil field gathering and transportation pipeline is purged;
3) the compressed air entrained sand particle that advances with rotation purges the oil field gathering and transportation pipeline inwall;
4) with compressed air oil field gathering and transportation pipeline is purged;
5) mix with paint thinner with compressed air the oil field gathering and transportation pipeline inwall is cleaned;
6) in oil field gathering and transportation pipeline, form whirlwind with compressed air and mix, make coating be bonded in the oil field gathering and transportation pipeline inwall equably with coating;
7) ventilate in oil field gathering and transportation pipeline with compressed air, make paint solidification.
Described sand grains is that hardness is lower than steel pipe and has water caltrop.
The present invention adopts aerodynamic principle, again inner-walls of duct is carried out film anticorrosion with physical method removing inner-walls of duct rust, dirt, can play the purpose of enhanced protection.Technique functions comes from the cyclone phenomenon of the Nature, afield, in the desert, when air-flow reaches certain speed, just form whirlwind, with sandstone, article volume heavenwards.According to the principle of this natural phenomena, the present invention is in pipeline, and artificial make " cyclone " adds the band sandstone and removes the inner-walls of duct fouling and carry out coating again and film.
Swirling eddy is through experimental results demonstrate, pneumatic phenomenon generally has three kinds of situations, curved undulation during low speed in the pipeline; Linearly move during high speed; Be during middling speed and rotatablely move.The present invention adopts aerodynamic principle, and to rotate the air-flow entrained sand particle that advances, the principle of rolling friction is removed rust deposite in the pipe, and residue advances coating with whirlwind again, makes coating uniform (rotary centrifugal force effect) be bonded in inner-walls of duct.The sand grains of selecting for use one is that hardness is lower than steel pipe, the 2nd, and the little band water caltrop of quality, thus minimum to the tube wall damage during rolling friction, and can both remove the residue in the tiny jog of inner-walls of duct, lay a solid foundation for filming.
The present invention has the pigging completeness and persistent characteristics of filming.The about 3km of one-off construction length.Swirling eddy method inner-walls of duct cleans and aseptic technic can be widely used in defeated, the filling pipe of oil field new (old) collection, to produce important breakthrough in oil field pipe cleaning and corrosion-resistant field, to the anticorrosion blank that will fill up oil field pipe cleaning and corrosion-resistant field of small-bore pipeline scale removal.
The concrete characteristics of the present invention have:
1, no matter the trend of pipeline no matter how to change promptly pipeline be level, turning, vertically or tilt trend, also same pipeline reducing (from changing to little greatly or big) or have many to be in charge of and can to carry out scale removal and film whether no matter from changing to for a short time.
2, because the present invention has realized non-excavation, need not destroy the characteristics and the effect of existing facility uniqueness, construction is flexible, and efficiency of construction has improved tens times, and construction cost has then descended more than 50%.
3, the abrasive material of scale removal and inner-wall paint can multifariously be selected according to purposes and demand, have created the popularity of suitable application area.
4, the anticorrosion blank of filling up the oil field of small-bore pipeline scale removal has especially been simplified simultaneously the recovery technique of pipeline again greatly.
5, to be coated with Application of membrane pipeline life forecast be 15 years to the swirling eddy eliminating sludge in pipe, with do not carry out the pipeline that scale removal films and compare, prolong 2 times service life, pipeline after scale removal is simultaneously filmed has reduced the coefficient of friction of liquid flow in the pipeline, reduced flow resistance, reduce the pressure reduction of pipeline front and back, improved injection water quality, reduced the electricity charge.
Compressed-air actuated pressure is 0.5～3MPa in the described step 1), from low to high oil field gathering and transportation pipeline is purged, and blows out until no-sundries.
Step 2 of the present invention) compressed air pressure is that 2.7MPa～3MPa, flow velocity are 40m/s in.
Compressed-air actuated pressure is 2.7MPa～3MPa in the step 3), flow velocity 40m/s.
The pressure of whirlwind in oil field gathering and transportation pipeline is 2.7 MPa～3 MPa in the step 6), and gas flow is at 3.03 m
3～3.46m
3
The specific embodiment
One, is connected an end of one section oil field gathering and transportation pipeline with air compressor machine.
Two, cleaning pipeline
Cleaning length of pipeline 575m utilizes compressed air to remove the interior foreign material of pipe, blows out until no-sundries.Purging should be from 0.5-3MPa pressure from low to high, and the foreign material of avoiding high pressure to wash away bringing stop up.The recording compressed machine is made 20m
3Air accumulator is the needed time under different pressures, the outflow situation of well head.
Three, derusting by sandblasting
1, at pressure 2.7MPa～3MPa, add water under the situation of flow velocity 40m/s oil field gathering and transportation pipeline is purged 1 time, amount of water 40kg, air outlet valve and outlet valve are opened simultaneously, and flowing water Valve is in half-open position.If pressure is lower than claimed range, need valve is in time closed, treat to continue above operation after pressure gos up.
2, at pressure 2.7MPa～3MPa, add sand grains under the situation of flow velocity 40m/s to oil field gathering and transportation pipeline scale removal 3 times, add sand amount 40kg, 60kg, 80kg successively, sand grains requires: hardness is lower than steel pipe, has water caltrop.Air outlet valve is opened simultaneously with the valve that shakes out, and the valve that shakes out is in half-open position.If pressure is lower than claimed range, need valve is in time closed, treat to continue above operation after pressure gos up.
3, open air valve earlier and drive the sand valve again, or carry out synchronously, avoid sand plug.
4, observe the descaling and derusting situation of the port of export,, consider to repeat above step, add sand amount greatly if do not see the metal true qualities.If see that the metal true qualities stop above operation.
Four, pipeline cleans
Purge with compressed air earlier, the coating special diluting agent with some mixes the floating dust of thoroughly removing the pipeline inwall with compressed air again, has or not moisture to blow out with the way inspection outlet of estimating and gets final product.
Five, spraying
1, calculates the coating consumption by length of pipeline, press the pipeline inner surface and prepare coating, join curing agent, fully stir with machinery according to the coating operation instruction in 180 grams/square metre (150kg).Should spray immediately after coating stirs, avoid the coating precipitation.
2, the coating that stirs is injected hopper, the ventilation spraying.Because of coating precipitates segregation easily, thus the time that the coating in-line stops unsuitable long (not above 3～5 minutes), so venting pressure at 2.7 MPa～3 MPa, gas flow is at 3.03 m
3～3.46m
3In the scope.Should comprehensively determine the spraying venting pressure and progressively improve pressure to spray fully according to logical sand and rinse liquid outlet time until coating.Check each test specimen, answer no sag, no wave, smooth surface smooth.
Six, post-purge
Should utilize compressed air in pipe, to ventilate after spraying is finished immediately, be beneficial to inner tube coating and solidify.The post-purge venting pressure is unsuitable excessive, and avoiding producing coating has the wave phenomenon, and the outlet feel has air-flow to go out to get final product.Until drying up (hand does not have seal).
Claims (6)
1. an oil field gathering and transportation pipeline inwall cleans and the coating antiseptic method, it is characterized in that may further comprise the steps:
1) blows out foreign material in the oil field gathering and transportation pipeline with compressed air;
2) mix with water with compressed air oil field gathering and transportation pipeline is purged;
3) the compressed air entrained sand particle that advances with rotation purges the oil field gathering and transportation pipeline inwall;
4) with compressed air oil field gathering and transportation pipeline is purged;
5) mix with paint thinner with compressed air the oil field gathering and transportation pipeline inwall is cleaned;
6) in oil field gathering and transportation pipeline, form whirlwind with compressed air and mix, make coating be bonded in the oil field gathering and transportation pipeline inwall equably with coating;
7) ventilate in oil field gathering and transportation pipeline with compressed air, make paint solidification.
2. clean and the coating antiseptic method according to the described oil field gathering and transportation pipeline inwall of claim 1, it is characterized in that the hardness of described sand grains is lower than steel pipe, and sand grains has water caltrop.
3. clean and the coating antiseptic method according to the described oil field gathering and transportation pipeline inwall of claim 1, it is characterized in that compressed-air actuated pressure is 0.5～3MPa in the described step 1), from low to high oil field gathering and transportation pipeline is purged, blow out until no-sundries.
4. clean and the coating antiseptic method according to the described oil field gathering and transportation pipeline inwall of claim 1, it is characterized in that described step 2) in compressed air pressure be that 2.7MPa～3MPa, flow velocity are 40m/s.
5. clean and the coating antiseptic method according to the described oil field gathering and transportation pipeline inwall of claim 1, it is characterized in that compressed-air actuated pressure is 2.7MPa～3MPa in the described step 3), flow velocity 40m/s.
6. clean and the coating antiseptic method according to the described oil field gathering and transportation pipeline inwall of claim 1, it is characterized in that the pressure of whirlwind in oil field gathering and transportation pipeline is 2.7 MPa～3 MPa in the described step 6), gas flow is at 3.03 m
3～3.46m
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110062387 CN102172572B (en) | 2011-03-16 | 2011-03-16 | Inner wall washing and coating corrosion resisting method for manifold pipelines in oil fields |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110062387 CN102172572B (en) | 2011-03-16 | 2011-03-16 | Inner wall washing and coating corrosion resisting method for manifold pipelines in oil fields |
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| Publication Number | Publication Date |
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| CN102172572A true CN102172572A (en) | 2011-09-07 |
| CN102172572B CN102172572B (en) | 2013-01-09 |
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| CN 201110062387 Expired - Fee Related CN102172572B (en) | 2011-03-16 | 2011-03-16 | Inner wall washing and coating corrosion resisting method for manifold pipelines in oil fields |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562228A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Method for preventing spinning-solution conveying pipe from crusting |
| CN105642620A (en) * | 2014-11-13 | 2016-06-08 | 广东核电合营有限公司 | Method and device for cleaning and coating of interior of nuclear power station pipeline through aerodynamic force |
| CN106475913A (en) * | 2016-04-13 | 2017-03-08 | 吉林省天德立管道工程科技有限公司 | The rust cleaning of swirling eddy method inner-walls of duct snaking, coating antiseptic technology |
| CN108758162A (en) * | 2018-05-07 | 2018-11-06 | 安徽申能建设工程有限公司 | A kind of pipeline construction robot and its pipeline construction method |
| CN109373101A (en) * | 2018-11-12 | 2019-02-22 | 北京扬帆凯程科技有限公司 | A kind of detection of new old pipeline, reparation, anti-corrosion method |
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| JPH07214022A (en) * | 1994-02-01 | 1995-08-15 | Osaka Gas Co Ltd | Cleaning method of resin lining water supply pipe |
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| CN1654135A (en) * | 2005-02-28 | 2005-08-17 | 王筱均 | Method of rust cleaning, scale removing, film coating and corrosion preventing for large and middle sized pipeline inside wall |
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| CN101518773A (en) * | 2009-03-24 | 2009-09-02 | 李常胜 | Method and device for clearing rust-dirt and performing anticorrosion coating on metal pipelines |
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2011
- 2011-03-16 CN CN 201110062387 patent/CN102172572B/en not_active Expired - Fee Related
Patent Citations (5)
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| JPH07214022A (en) * | 1994-02-01 | 1995-08-15 | Osaka Gas Co Ltd | Cleaning method of resin lining water supply pipe |
| US6841125B1 (en) * | 2000-09-20 | 2005-01-11 | Whi Usa, Inc. | Method and apparatus to clean and apply foamed corrosion inhibitor to ferrous surfaces |
| CN1654135A (en) * | 2005-02-28 | 2005-08-17 | 王筱均 | Method of rust cleaning, scale removing, film coating and corrosion preventing for large and middle sized pipeline inside wall |
| CN101386981A (en) * | 2007-09-12 | 2009-03-18 | 浙江工贸职业技术学院 | Casting corrosion resistant processing solution and used casting anticorrosion treatment technology thereof |
| CN101518773A (en) * | 2009-03-24 | 2009-09-02 | 李常胜 | Method and device for clearing rust-dirt and performing anticorrosion coating on metal pipelines |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562228A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Method for preventing spinning-solution conveying pipe from crusting |
| CN105642620A (en) * | 2014-11-13 | 2016-06-08 | 广东核电合营有限公司 | Method and device for cleaning and coating of interior of nuclear power station pipeline through aerodynamic force |
| CN106475913A (en) * | 2016-04-13 | 2017-03-08 | 吉林省天德立管道工程科技有限公司 | The rust cleaning of swirling eddy method inner-walls of duct snaking, coating antiseptic technology |
| CN108758162A (en) * | 2018-05-07 | 2018-11-06 | 安徽申能建设工程有限公司 | A kind of pipeline construction robot and its pipeline construction method |
| CN109373101A (en) * | 2018-11-12 | 2019-02-22 | 北京扬帆凯程科技有限公司 | A kind of detection of new old pipeline, reparation, anti-corrosion method |
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| CN102172572B (en) | 2013-01-09 |
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Granted publication date: 20130109 Termination date: 20160316 |