CN2926482Y - Well-drilling oil pipe of hydrogen-sulfide-resisting corrosive coating - Google Patents
Well-drilling oil pipe of hydrogen-sulfide-resisting corrosive coating Download PDFInfo
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- CN2926482Y CN2926482Y CN 200620018267 CN200620018267U CN2926482Y CN 2926482 Y CN2926482 Y CN 2926482Y CN 200620018267 CN200620018267 CN 200620018267 CN 200620018267 U CN200620018267 U CN 200620018267U CN 2926482 Y CN2926482 Y CN 2926482Y
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- oil pipe
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Abstract
The utility model relates to a drilling oil pipe with an anti hydrogen sulfide corrosion coating comprises a steel pipe(1),a male screw(2), a female screw(3),a modified phenolic aldehype coating(4), a modified epoxy surface coating(5),a modified phenolic aldehype coating(6), and a modified epoxy surface coating(7). The coatings are characterized in excellent adhesion, toughness, wear resistance, heat resistance, and solvent resistance, in particular anti hydrogen sulfide corrosion. Under condition of total pressure of 32Mpa,H2S, partial pressure 3.2MPa,CO2, partial pressure 3.2Mpa, immersion of 168h coating in solution under the temperature of 93 Celsius system has advantages of anti strong acid corrosion and anti corrosion of mixed solution of 15% hydrochloride and 15% hydrofluoric acid under the temperature of 93 Celsius system.
Description
Technical field
The utility model relates to a kind of drilling well oil pipe of hydrogen sulfide corrosion resistant coating.
Background technology
Existing drilling well oil pipe does not have erosion shield at the negative thread and the pin thread place at oil pipe two ends, and the steel surface at screw thread place suffers the heavy corrosion of stratum water quality; The internally coated drilling well oil pipe of existing epoxy, its hydrogen sulfide corrosion-resistant performance, anti-strong acid performance deficiency.
The utility model content
The technical problems to be solved in the utility model: avoid above-mentioned weak point of the prior art and a kind of drilling well oil pipe that the hydrogen sulfide corrosion resistant coating of hydrogen sulfide corrosion resistant and the corrosion of anti-strong acid is arranged at negative thread and pin thread place, at inside pipe wall is provided.
The technical solution adopted in the utility model
The drilling well oil pipe of hydrogen sulfide corrosion resistant coating, form by steel pipe 1, it is characterized in that pin thread 2 being arranged at an end of steel pipe 1, the other end at steel pipe 1 has negative thread 3, inner surface at steel pipe 1 has modified phenolic scratch coat 4 and modified epoxy finishing coat 5 in turn, on the surface of pin thread 2 and negative thread 3 modified phenolic scratch coat 6 and modified epoxy finishing coat 7 are arranged in turn, steel pipe 1 length 9～24m, pipe thickness 5～20mm, bore 50～100mm, the length of pin thread 2 and negative thread 3 respectively is 10～100mm, negative thread matches with pin thread, and the thickness of modified phenolic scratch coat 4 is 0.2～0.5mm, the thickness of modified epoxy finishing coat 5 is 0.2～0.5mm, the thickness of modified phenolic scratch coat 6 is 0.06～0.15mm, the thickness of modified epoxy finishing coat 7 is 0.06～0.15mm.
The drilling well oil pipe of more excellent hydrogen sulfide corrosion resistant coating, the long 9.5m of steel pipe, pipe thickness 6.5mm, bore 51mm, the length of pin thread 2 and negative thread 3 is that the thickness of 0.2mm, modified epoxy finishing coat 5 is that the thickness of 0.2mm, modified phenolic scratch coat 6 is that the thickness of 0.1mm, modified epoxy finishing coat 7 is 0.1mm for the thickness of 10mm, modified phenolic scratch coat 4 respectively.
The drilling well oil pipe manufacture process of hydrogen sulfide corrosion resistant coating: steel pipe 1 inner surface is applied modified phenolic scratch coat 4 and modified epoxy finishing coat 5 in turn, apply modified phenolic scratch coat 6 and modified epoxy finishing coat 7 in turn on the surface of pin thread 2 and negative thread 3.The negative thread 3 of last oil pipe matches with the pin thread 2 of a back oil pipe during construction.
The coating that modified phenolic scratch coat 4 and modified phenolic scratch coat 6 are made up of phenol-formaldehyde resin modified, dimethylbenzene, cyclohexanone, polyacrylate EVA solution, poly-methyl alkyl siloxane solution, polyamide wax and pigment, filler and forming, modified epoxy finishing coat 5 and modified epoxy finishing coat 7 by modified epoxy, dimethylbenzene, DAA, phenolic resins, polytetrafluoroethylene (PTFE), polyacrylate EVA solution, gather the coating that methyl alkyl siloxane solution, polyamide wax and pigment, filler form and form.
The utility model beneficial effect compared with prior art
1, the drilling well oil pipe of hydrogen sulfide corrosion resistant coating of the present utility model, can strengthen the anti-corrosion capability of the pin thread 2 and the negative thread 3 at oil pipe two ends effectively, modified phenolic scratch coat and modified epoxy finishing coat have good adhesive power, toughness, abrasion resistance, heat resistance, solvent resistance, especially hydrogen sulfide corrosion resistant is at stagnation pressure 32MPa, H
2S dividing potential drop 3.2MPa, CO
2Dividing potential drop 3.2MPa, immersion 168h coating is intact in 90 ℃ of solution, also can corrode by anti-strong acid, can anti-15% hydrochloric acid and 15% hydrofluoric acid mixed solution under 93 ℃.
2, the drilling well oil pipe is when connecting construction, because negative thread and pin thread place do not have corrosion, it is reliable to connect construction safety, good airproof performance.
Description of drawings
Fig. 1 is the sectional view of the drilling well oil pipe of hydrogen sulfide corrosion resistant coating;
Fig. 2 is the schematic diagram of pin thread 2;
Fig. 3 is the schematic diagram of negative thread 3.
Among the figure: the 1-steel pipe; The 2-pin thread; The 3-negative thread; 4-modified phenolic scratch coat; 5-modified epoxy finishing coat; 6-modified phenolic scratch coat; 7-modified epoxy finishing coat.
The specific embodiment 1
The drilling well oil pipe of hydrogen sulfide corrosion resistant coating, the length of the long 9.5m of steel pipe, pipe thickness 6.5mm, bore 51mm, pin thread 2 and negative thread 3 are that the thickness of 0.2mm, modified epoxy finishing coat 5 is that the thickness of 0.2mm, modified phenolic scratch coat 6 is that the thickness of 0.1mm, modified epoxy finishing coat 7 is 0.1mm for the thickness of 10mm, modified phenolic scratch coat 4 respectively.
The drilling well oil pipe performance test of hydrogen sulfide corrosion resistant coating shows that it is safe and reliable that oil pipe connects construction operation; Oil pipe face coat strong adhesion has good toughness, abrasion resistance, heat resistance, solvent resistance, and hydrogen sulfide corrosion resistant especially is at stagnation pressure 32MPa, H
2S dividing potential drop 3.2MPa, CO
2Dividing potential drop 3.2MPa, it is intact to soak the 168h coating in 90 ℃ of solution, also can anti-strong acid corrosion, down can anti-15% hydrochloric acid and the corrosion of 15% hydrofluoric acid mixed solution at 93 ℃.
Claims (2)
1, a kind of drilling well oil pipe of hydrogen sulfide corrosion resistant coating, form by steel pipe (1), it is characterized in that pin thread (2) being arranged at an end of steel pipe (1), the other end at steel pipe (1) has negative thread (3), inner surface at steel pipe (1) has modified phenolic scratch coat (4) and modified epoxy finishing coat (5) in turn, on the surface of pin thread (2) and negative thread (3) modified phenolic scratch coat (6) and modified epoxy finishing coat (7) are arranged in turn, steel pipe (1) length 9～24m, pipe thickness 5～20mm, bore 50～100mm, the length of pin thread (2) and negative thread (3) respectively is 10～100mm, negative thread (3) matches with pin thread (2), and the thickness of modified phenolic scratch coat (4) is 0.2～0.5mm, the thickness of modified epoxy finishing coat (5) is 0.2～0.5mm, the thickness of modified phenolic scratch coat (6) is 0.06～0.15mm, the thickness of modified epoxy finishing coat (7) is 0.06～0.15mm.
2, the drilling well oil pipe of hydrogen sulfide corrosion resistant coating according to claim 1, the length that it is characterized in that the long 9.5m of steel pipe, pipe thickness 6.5mm, bore 51mm, pin thread (2) and negative thread (3) are that the thickness of 0.2mm, modified epoxy finishing coat (5) is that the thickness of 0.2mm, modified phenolic scratch coat (6) is that the thickness of 0.1mm, modified epoxy finishing coat (7) is 0.1mm for the thickness of 10mm, modified phenolic scratch coat (4) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620018267 CN2926482Y (en) | 2006-03-24 | 2006-03-24 | Well-drilling oil pipe of hydrogen-sulfide-resisting corrosive coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620018267 CN2926482Y (en) | 2006-03-24 | 2006-03-24 | Well-drilling oil pipe of hydrogen-sulfide-resisting corrosive coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2926482Y true CN2926482Y (en) | 2007-07-25 |
Family
ID=38280726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620018267 Expired - Lifetime CN2926482Y (en) | 2006-03-24 | 2006-03-24 | Well-drilling oil pipe of hydrogen-sulfide-resisting corrosive coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2926482Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305027A (en) * | 2011-08-12 | 2012-01-04 | 西南石油大学 | Anti-corrosion thermal-proof oil pipe with thermal barrier coating on surface for thermal recovery of thick oil |
| CN105385292A (en) * | 2015-12-28 | 2016-03-09 | 江苏长源油气管件防腐有限公司 | Petroleum-drill-rod inner coating |
-
2006
- 2006-03-24 CN CN 200620018267 patent/CN2926482Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305027A (en) * | 2011-08-12 | 2012-01-04 | 西南石油大学 | Anti-corrosion thermal-proof oil pipe with thermal barrier coating on surface for thermal recovery of thick oil |
| CN102305027B (en) * | 2011-08-12 | 2013-12-11 | 西南石油大学 | Anti-corrosion thermal-proof oil pipe with thermal barrier coating on surface for thermal recovery of thick oil |
| CN105385292A (en) * | 2015-12-28 | 2016-03-09 | 江苏长源油气管件防腐有限公司 | Petroleum-drill-rod inner coating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070725 |
|
| EXPY | Termination of patent right or utility model |