CN103418537A - Internal powder spraying process for petroleum tubes - Google Patents
Internal powder spraying process for petroleum tubes Download PDFInfo
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- CN103418537A CN103418537A CN2012101535508A CN201210153550A CN103418537A CN 103418537 A CN103418537 A CN 103418537A CN 2012101535508 A CN2012101535508 A CN 2012101535508A CN 201210153550 A CN201210153550 A CN 201210153550A CN 103418537 A CN103418537 A CN 103418537A
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Abstract
The invention discloses an internal powder spraying process for petroleum tubes. The internal powder spraying process includes the flowing steps: 1, using a hot cleaning furnace to incinerate various grease dirt and impurities on the inner surfaces of the tubes; 2, performing surface sand blasting on the inner walls of the tubes; 3, utilizing high-pressure airless spraying equipment to spray undercoats onto the petroleum tubes; 4, putting the tubes into a continuous furnace for firing, and enabling the temperatures of tube bodies to reach 180 DEG C-200 DEG C; 5, when the surface temperatures of the tubes are higher than 170 DEG C, using powder spraying equipment to perform internal powder spraying on the petroleum tubes; 6, after powder spraying is finished, immediately putting the tubes into a curing furnace for firing for 60 minutes at the curing temperature of 220 DEG C-235 DEG C; 7, performing leaking point inspection after the tubes are cooled, wherein the leaking point of a qualified product is zero. A solvent coating spraying process is replaced by the environment-friendly powder spraying process, so that requirements of oilfields on internal coatings of the petroleum tubes are met, application ranges of the tubes are further expanded, and good social and economic benefits are realized.
Description
Technical field
The present invention relates to the surface treatment of tubing, particularly spraying coating process in a kind of OCTG powder.
Background technology
At present, in OCTG, spraying technology is mainly to adopt liquid high pressure airless spraying, utilizes the High Rotation Speed of air motor, makes liquid coating be coated on internal surface of pipe after atomization, but, owing to containing a large amount of solvents in liquid coating, can cause the pollution of environment.In order to respond country to the requirement of environmental protection and the exploitation that meets overseas market, need a kind of interior spraying coating process of powder of environment-friendly type to replace the solvent-borne type spraying, so powder coating have good social benefit and Business Economic Benefit.
Summary of the invention
Purpose of the present invention, be exactly for the above-mentioned problems in the prior art, and spraying coating process in a kind of OCTG powder is provided.
To achieve these goals, the present invention has adopted following technical scheme: spraying coating process in a kind of OCTG powder comprises following step in sequence:
(1) tubing is placed in the thermal cleaning stove, various greasy dirts, the impurity of internal surface of pipe are incinerated;
(2) tubing is shifted out in the thermal cleaning stove, adopt abrasive blast equipment to carry out the surface sand-blasting processing to pipe material inner wall;
(3) utilize the priming paint spraying equipment at OCTG inner surface spraying one deck priming paint;
(4) tubing that will spray after priming paint is sent into the baking of priming paint continuous oven, and the body temperature is heated to 180～200 ℃;
(5) tubing is pulled out to the priming paint continuous oven, in the tube surfaces temperature, during higher than 170 ℃, use the inner surface spraying one deck powdery paints of powder spray coating device at tubing;
(6) after spraying in powder, immediately tubing is sent into to curing oven and carried out baking-curing, solidification temperature is controlled at 220～235 ℃, and be 60 minutes hardening time;
(7) carrying out the leak source detection after tubing is cooling, is certified products without leak source.
Tubing being placed in to the thermal cleaning stokehold, first tubing sealing surface and screw thread are cleaned.
Described priming paint is the coating that product type is TC4028, and the THICKNESS CONTROL of prime coat is at 20-25 μ m.
Described powdery paints adopts the powdery paints that product type is TC3520A, and the thickness of powdery paints layer is 400～600 μ m.
The time that described tubing is sent into the baking of priming paint continuous oven is controlled at 20-45 minute.
Male end at tubing during powder spray is provided with tornadotron collection powder.
Female end at tubing during powder spray is provided with vibratory sieve, and powder is reused.
Described leak source detects and uses the electric spark device for detecting leak point to be detected.
Described priming paint spraying equipment is high pressure airless spraying apparatus.
Operation principle of the present invention is: the greasy dirt, the impurity that when thermal cleaning, utilize the circulation hot gas in clean stove that the pipe material inner wall difficulty is removed utilize high temperature to decompose removing, make it to reach the dry ash shape so that follow-up sandblast.Utilize brown corundum and pressure-air to carry out sandblast, pipe material inner wall is carried out to surface treatment.Spraying coating process in powder, be first to adopt priming paint spraying one deck liquid coating, and then high-temperature heating makes powdery paints be coated on very thin priming paint in certain temperature range scope, guarantees the adhesive force of powder coating.After spraying, making rapidly OCTG enter curing oven carries out hot setting, guarantees the quality of whole coating.Application of the present invention is that the powdery paints improved by environment-friendly type has substituted solvent based coating, can improve again coating abrasion performance and the anti-anti-corrosive properties of OCTG simultaneously, further enlarge the tubing range of application, meet user's great demand, there is good social benefit and Business Economic Benefit.
Spraying coating process in OCTG powder of the present invention, owing to having adopted above technical scheme, has following advantage and good effect:
1,, with respect to spraying coating process in solvent-borne type, in powder, spraying coating process has the good feature of environmental protection;
2, in powder, the thickness of the coating of spraying is relatively thick, the service life that can effectively improve coating;
3, the flatness on the surface of the smooth and coating of the coating surface of OCTG inwall is all very good, has greatly improved anti-corrosive properties, the drag reduction of OCTG.
The specific embodiment
Spraying coating process in OCTG powder of the present invention comprises OCTG lambda line, sealing surface and thread cleaning, then is operated according to the following steps:
(1) use the thermal cleaning stove, utilize high temperature that the various greasy dirts of internal surface of pipe, impurity are incinerated and is convenient to spray
(2) in abrasive blast equipment, utilize brown corundum and pressure-air to carry out sandblast, pipe material inner wall is carried out to surface treatment.
(3) utilize high pressure airless spraying apparatus to carry out the priming paint spraying to OCTG, the THICKNESS CONTROL of priming paint is at 20-25 μ m, and can see that in body, base material is advisable, priming paint is selected from the coating that product type is TC4028.
(4) enter the baking of priming paint continuous oven, make most 180～200 ℃ of body temperature heating, the time is controlled at 20-45 minute.
(5) use pull bar that tubing is pulled out to the priming paint continuous oven, and during higher than 170 ℃, use powder spray coating device to carry out spraying in powder to OCTG in the tube surfaces temperature.In powder, the material of spraying is the powdery paints that product type is TC3520A, and coating layer thickness is 400～600 μ m.
(6) after spraying in powder, enter immediately the curing oven baking, solidification temperature is 220～235 ℃, and be 60 minutes hardening time.
(7) after tubing is cooling, carry out the leak source detection with the electric spark device for detecting leak point, without leak source, be certified products.
Following instance is prime coat and adopts the coating that product type is TC4028, and powder coating adopts the powdery paints that product type is TC3520A.
Embodiment 1: tubing is 5 cun drilling rods, and primer coating thickness is 20 μ m, and the priming paint baking temperature is 180 ℃, and baking time is 30 minutes, when drill pipe body temperature 170 degree is above, carries out powder spray, and coating layer thickness is 480 μ m.The final solidification temperature of coating is 225 ℃, and be 60 minutes hardening time, implementation result: by Performance Detection, think that interior aseptic production meets the indices in petroleum industry drilling rod standard SY/T0544-2010 fully; In natural and artificial drilling fluid, strong basicity corrosive medium Injection Well, effect is good.
Embodiment 2: tubing is 3 1/2 cun oil pipes, and primer coating thickness is 20 μ m, and the priming paint baking temperature is 185 ℃, and baking time is 20 minutes, when oil pipe body temperature 175 degree is above, carries out powder spray, and coating layer thickness is 500 μ m.Solidification temperature is 225 ℃, be 60 minutes hardening time, implementation result: by Performance Detection, think that coating quality meets the indices in petroleum industry oil, standardization of casing SY/T6717-2008 fully, each field use is respond well at home, Different Strata at various corrosive mediums, in the oil well that the highest service temperature is 170 ℃, the long-term use, interior aseptic production performance is still good.
Embodiment 3: the gas delivering pipe that tubing is diameter 219mm, and primer coating thickness is 25 μ m, and the priming paint baking temperature is 190 ℃, and baking time is 40 minutes, when carrier pipe body temperature 175 degree is above, carries out powder spray, and coating layer thickness is 450 μ m.Solidification temperature is 225 ℃, and be 60 minutes hardening time, implementation result: after testing, indices all meets the oil and gas industry standard, long service under high corrosive environment, and interior anticorrosive coat is in order.
Claims (9)
1. spraying coating process in an OCTG powder is characterized in that: comprise following step in sequence:
(1) tubing is placed in the thermal cleaning stove, various greasy dirts, the impurity of internal surface of pipe are incinerated;
(2) tubing is shifted out in the thermal cleaning stove, adopt abrasive blast equipment to carry out the surface sand-blasting processing to pipe material inner wall;
(3) utilize the priming paint spraying equipment at OCTG inner surface spraying one deck priming paint;
(4) tubing that will spray after priming paint is sent into the baking of priming paint continuous oven, and the body temperature is heated to 180～200 ℃;
(5) tubing is pulled out to the priming paint continuous oven, in the tube surfaces temperature, during higher than 170 ℃, use the inner surface spraying one deck powdery paints of powder spray coating device at tubing;
(6) after spraying in powder, immediately tubing is sent into to curing oven and carried out baking-curing, solidification temperature is controlled at 220～235 ℃, and be 60 minutes hardening time;
(7) carrying out the leak source detection after tubing is cooling, is certified products without leak source.
2. spraying coating process in OCTG powder as claimed in claim 1, is characterized in that: tubing being placed in to the thermal cleaning stokehold, first tubing sealing surface and screw thread are cleaned.
3. spraying coating process in OCTG powder as claimed in claim 1, it is characterized in that: described priming paint is the coating that product type is TC4028, the THICKNESS CONTROL of prime coat is at 20-25 μ m.
4. spraying coating process in OCTG powder as claimed in claim 1, it is characterized in that: described powdery paints adopts the powdery paints that product type is TC3520A, and the thickness of powdery paints layer is 400～600 μ m.
5. spraying coating process in OCTG powder as claimed in claim 1, it is characterized in that: the time that described tubing is sent into the baking of priming paint continuous oven is controlled at 20-45 minute.
6. spraying coating process in OCTG powder as claimed in claim 1 is characterized in that: be provided with tornadotron in the male end of tubing during powder spray and collect powder.
7. spraying coating process in OCTG powder as claimed in claim 1, it is characterized in that: the female end at tubing during powder spray is provided with vibratory sieve, and powder is reused.
8. spraying coating process in OCTG powder as claimed in claim 1, it is characterized in that: described leak source detects and uses the electric spark device for detecting leak point to be detected.
9. spraying coating process in OCTG powder as claimed in claim 1, it is characterized in that: described priming paint spraying equipment is high pressure airless spraying apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101535508A CN103418537A (en) | 2012-05-15 | 2012-05-15 | Internal powder spraying process for petroleum tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101535508A CN103418537A (en) | 2012-05-15 | 2012-05-15 | Internal powder spraying process for petroleum tubes |
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| Publication Number | Publication Date |
|---|---|
| CN103418537A true CN103418537A (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101535508A Pending CN103418537A (en) | 2012-05-15 | 2012-05-15 | Internal powder spraying process for petroleum tubes |
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| CN (1) | CN103418537A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772269A (en) * | 2014-01-10 | 2015-07-15 | 上海图博可特石油管道涂层有限公司 | Drill rod powder internal coating technology for well drilling |
| CN104907239A (en) * | 2015-05-26 | 2015-09-16 | 成都高普石油工程技术有限公司 | Oil pipeline powder inner spraying method |
| CN106140587A (en) * | 2015-03-25 | 2016-11-23 | 上海图博可特石油管道涂层有限公司 | Inner coating process for transfer oil and the heavy caliber pipe of natural gas |
| CN106288797A (en) * | 2015-05-27 | 2017-01-04 | 江苏图博可特曙光涂层有限公司 | The conjuncted continuous oven of improved structure |
| CN107511316A (en) * | 2017-09-15 | 2017-12-26 | 四川海隆石油技术有限公司 | A kind of conveyance conduit bend pipe inner coating process |
| CN107971198A (en) * | 2017-11-14 | 2018-05-01 | 中国石油集团渤海石油装备制造有限公司 | Drive main shaft inner anticorrosioning coating production method in top |
| CN108300175A (en) * | 2016-08-29 | 2018-07-20 | 河北太和洁源水务科技发展有限公司 | A kind of novel tubing inner-lining coating process of paddling |
| CN108612927A (en) * | 2018-07-06 | 2018-10-02 | 上海图博可特石油管道涂层有限公司 | A kind of gathering line stainless steel connection structure |
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| US5630875A (en) * | 1992-12-13 | 1997-05-20 | Montell North America Inc. | Apparatus for coating the inside surface of metal containers with polyolefin materials |
| CN1198964A (en) * | 1997-05-13 | 1998-11-18 | 瓦格纳国际股份公司 | Device for separating excess powder oversprayed when powder coating workpieces |
| CN1765526A (en) * | 2005-11-25 | 2006-05-03 | 华东理工大学 | Method for painting fluoro resin inside slender metal tube |
| CN201172037Y (en) * | 2008-03-03 | 2008-12-31 | 南京希丽仕涂装设备工程有限公司 | Recovery filtering device of powder spraying coating device |
| CN201529542U (en) * | 2009-09-16 | 2010-07-21 | 王小钧 | Shearing type disintegrator |
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2012
- 2012-05-15 CN CN2012101535508A patent/CN103418537A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5630875A (en) * | 1992-12-13 | 1997-05-20 | Montell North America Inc. | Apparatus for coating the inside surface of metal containers with polyolefin materials |
| CN1198964A (en) * | 1997-05-13 | 1998-11-18 | 瓦格纳国际股份公司 | Device for separating excess powder oversprayed when powder coating workpieces |
| CN1765526A (en) * | 2005-11-25 | 2006-05-03 | 华东理工大学 | Method for painting fluoro resin inside slender metal tube |
| CN201172037Y (en) * | 2008-03-03 | 2008-12-31 | 南京希丽仕涂装设备工程有限公司 | Recovery filtering device of powder spraying coating device |
| CN201529542U (en) * | 2009-09-16 | 2010-07-21 | 王小钧 | Shearing type disintegrator |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772269A (en) * | 2014-01-10 | 2015-07-15 | 上海图博可特石油管道涂层有限公司 | Drill rod powder internal coating technology for well drilling |
| CN106140587A (en) * | 2015-03-25 | 2016-11-23 | 上海图博可特石油管道涂层有限公司 | Inner coating process for transfer oil and the heavy caliber pipe of natural gas |
| CN104907239A (en) * | 2015-05-26 | 2015-09-16 | 成都高普石油工程技术有限公司 | Oil pipeline powder inner spraying method |
| CN106288797A (en) * | 2015-05-27 | 2017-01-04 | 江苏图博可特曙光涂层有限公司 | The conjuncted continuous oven of improved structure |
| CN108300175A (en) * | 2016-08-29 | 2018-07-20 | 河北太和洁源水务科技发展有限公司 | A kind of novel tubing inner-lining coating process of paddling |
| CN107511316A (en) * | 2017-09-15 | 2017-12-26 | 四川海隆石油技术有限公司 | A kind of conveyance conduit bend pipe inner coating process |
| CN107971198A (en) * | 2017-11-14 | 2018-05-01 | 中国石油集团渤海石油装备制造有限公司 | Drive main shaft inner anticorrosioning coating production method in top |
| CN108612927A (en) * | 2018-07-06 | 2018-10-02 | 上海图博可特石油管道涂层有限公司 | A kind of gathering line stainless steel connection structure |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131204 |