CN204922390U - Compound oil pipe or compound oil sleeve pipe - Google Patents
Compound oil pipe or compound oil sleeve pipe Download PDFInfo
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- CN204922390U CN204922390U CN201520389457.6U CN201520389457U CN204922390U CN 204922390 U CN204922390 U CN 204922390U CN 201520389457 U CN201520389457 U CN 201520389457U CN 204922390 U CN204922390 U CN 204922390U
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- pipe
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- resistant material
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Abstract
The utility model relates to a metal compound pipe, especially a compound oil pipe or compound oil sleeve pipe. It includes the parent tube and overlaps the corrosion -resistant material bushing pipe of locating in the parent tube, its characterized in that: tip weak point in the tip of corrosion -resistant material bushing pipe of this parent tube, the position department of exposing the parent tube tip on the corrosion -resistant material bushing pipe tip outer is equipped with the overlay, and the thickness of this overlay equals parent tube thickness. The corrosion resistance that compound oil pipe or oil jacket intraduct can be guaranteed to it has also solved compound oil pipe or oil jacket pipe owing to high strength, the poor problem of welding nature. This kind of tip structure neither influences the mechanical properties of joint department, can increase one deck corrosion resistant alloy layer in the tip build -up welding again to guaranteeing to rely on the corrosion resistant alloy on inside lining anticorrosive alloy and the end seal face under the unchangeable circumstances of oil pipe threaded connection performance, prevent effectively that oil pipe inside and tip from taking place whole inefficacy of oil pipe that pitting corrosion, crevice corrosion etc. Cause.
Description
Technical field
The utility model relates to metal composite pipe, particularly a kind of composite oil pipe or compound oil casing pipes.
Background technique
In recent years, national oil field there occurs a lot of oil pipe and casing failure accident, causes huge economic loss.The one of the main reasons of oil pipe and casing failure is internal corrosion.Particularly the surrounding medium in exploitation such as Southwest Oil all contains H
2s, CI
_, CO
2deng aggressive medium, common under this rugged environment oil pipe shortens working life greatly, if maintenance or change, not only expense huge amount, and breaks in production, brings a series of environment and safety problem.Southwest Oil in those early years purchased the 13Cr of Japanese import, in recent years adopted domestic super 13Cr and 13Cr oil pipe.
Tarim Basin high-pressure oil-gas well down-hole oil tube have employed the super HP1-13CrFOX oil pipe of Japan, within 2008, goes into the well 1 month at that 2-8 of enlightening, finds that inwall, sealing surface, screw thread etc. create etch pit after proposition.
Adopt stainless steel can prevent oil pipe and casing corrosion perforation, but price is expensive especially.At present, due to price problem and one-time investment problems of too, oil field at home seldom adopts stainless steel sleeve pipe, and individual fields use only small part stainless steel oil pipe.Therefore, the oil pipe that Effect of Anti corrosivity is good, moderate and sleeve pipe very necessary, also very urgent.
At present, prevent hydrogen sulfide corrosion to mainly contain to adopt with corrosion-resistant steel and liner corrosion resistant alloy composite steel tube, be aided with note corrosion inhibitor and method such as coating corrosion-inhibiting coating etc.
Tube internal coating uses more general anti-corrosion method to inner surface of pipeline, and its advantage is that construction process is simple and price is not high, but as being applied to ground delivery pipe, burning the coating at pipe end position, thus produce serious corrosion at this position when erecting and welding.In tower, TZ4-7-9 well oil pipe is gone into operation for 1996,98 years metaideophone gas wells; Metaideophone well in 2005, under enter epoxy powder aldehyde coating tubing (27/8P110EU+27/81103SB), in July, 2005 (mud acid+hydrochloric acid+corrosion inhibitor, concentration 10), in June, 2006 (mud acid+hydrochloric acid, concentration 10) and carry out fixed tubular column acidizing treatment in March, 2008, change tubing string on January 7th, 2009 and find that tube corrosion is serious, box cupling ftractures.
Corrosion inhibitor is present in medium with suitable concentration and form, can prevent or slow down a kind of chemical substance or the compound substance of metal erosion.Facts have proved that corrosion inhibitor requires very high to the selectivity of application conditions, specific aim is very strong.The corrosion inhibitor that different medium or material often require is also different, even same medium, and when operational condition (as temperature, pressure, concentration, flow velocity etc.) changes, the corrosion inhibitor adopted may also need to change.Adopt that sulfur resistive steel pipe+corrosion inhibitor prevents the general phosgene field 1016 × 40 of hydrogen sulfide corrosion, X52 header there occurs weld cracking, initial analysis is thought to cause due to SSCC.
Composite steel tube is the making laminated composite metal pipe material that the various distinct methods of a class manufactures, also known as composition metal or bimetal tubing.APISPEC5LD/SY/T6623 " inside covering or liner corrosion resistant alloy composite steel tube specification " has two kinds of structures: inside cover (clad) and liner (lined).Inside to cover be a kind of metallurgy combination, cohesive force shows as shear strength, and liner is a kind of mechanical bond, shows as contact stress and frictional force.Liner corrosion resistant alloy composite steel tube is that lining pipe is expanding or inner lining corrosion resisting alloy layer is attached to the internal surface of carbon steel pipes by carbon steel pipes undergauge or additive method, and main technique has hydrostatic pressing to force expandingly to wait combination process.Have and manage the same corrosion resistance with CRA, its anticorrosion ability is better than the scheme of carbon steel tube+corrosion inhibitor.Compared with CRA pipe, with low cost; Compared with the scheme of carbon steel tube+corrosion inhibitor, although one-time investment is higher, use and maintenance cost can be saved in a large number.
Utilize composite steel tube principle manufacture composite oil pipe, key be to solve be oil (cover) pipe joint place anticorrosion layer process problem.
Because oil annular tube material is surrendered after Overheating Treatment and tensile strength is all very high, conventional composite pipe overlaying method is adopted at pipe end inwall, through a large amount of tests, built-up welding region mechanical properties decrease is caused in capital, so how to solve compound oil casing pipes welding edges problem, the key manufacturing compound oil jacket, also very urgent.
Summary of the invention
The purpose of this utility model is to provide a kind of composite oil pipe or compound oil casing pipes, mainly solve the technical problem existing for above-mentioned prior art, it can ensure the corrosion resistance of composite oil pipe or tubing and casing inside, also solves composite oil pipe or tubing and casing due to high strength, the problem of weldability difference.This end construction neither affects the mechanical property of joint, one deck corrosion resisting alloy layer can be increased again in end built-up welding, thus when ensureing that tubing round thread switching performance is constant, rely on the corrosion resisting alloy on liner corrosion resistant alloy and end part seal face, effectively prevent the oil pipe global failure that oil pipe inside and end origination point burn into crevice corrosion etc. cause.
The technical solution of the utility model is:
A kind of composite oil pipe or compound oil casing pipes, it comprises base tube and is sheathed on the resistant material bushing pipe in base tube; It is characterized in that: the end of this base tube is shorter than the end of resistant material bushing pipe, on resistant material bushing pipe end, the position of exposing outside base tube end is provided with overlay cladding, and the thickness of this overlay cladding equals base tube thickness.
Described composite oil pipe or compound oil casing pipes, is characterized in that: on this resistant material bushing pipe end, the length exposed outside base tube end is more than 15mm.
The utility model has the advantage of:
1. oil pipe or tubing and casing inside have added corrosion resisting alloy layer (resistant material bushing pipe), ensure that the corrosion resistance of oil pipe inside.
2. after pair compound, oil pipe or tubing and casing end have employed overlay cladding structure, effectively solve owing to welding the problem causing joint mechanical properties decrease.
3. built-up welding on resistant material bushing pipe, weldability is good, with the wlding welding of corrosion resistance higher than bushing pipe, does not reduce the overall corrosion resistance of bushing pipe.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Refer to Fig. 1, the utility model discloses a kind of composite oil pipe or compound oil casing pipes.As shown in the figure: the resistant material bushing pipe 3 that it comprises base tube 1 and is sheathed in base tube 1; It is characterized in that: the end of this base tube 1 is shorter than the end of resistant material bushing pipe 3, on resistant material bushing pipe 3 end, the position of exposing outside base tube 1 end is provided with overlay cladding 2, and the thickness of this overlay cladding 2 equals base tube 1 thickness.
In the utility model, base tube 1 can be any material of API5CT regulation, also can be the material of non-API standard, the relevant resistant material such as S31603, S31803, N08825 that resistant material bushing pipe 3 can select API5LD to specify according to concrete media environment, such as: stainless steel material.
After compound, base tube 1 car of composite pipe pipe end is fallen length and be about 15mm, then adopt craft or automatic surfacing exposing on bushing pipe, built-up welding thickness is identical with carbon steel tube wall thickness; Then require to process according to special thread.
Be only preferred embodiment of the present utility model in sum, be not used for limiting practical range of the present utility model.Namely all equivalences done according to the content of the utility model claim change and modify, and all should be technology category of the present utility model.
Claims (4)
1. a composite oil pipe, it comprises base tube (1) and is sheathed on the resistant material bushing pipe (3) in base tube (1); It is characterized in that: the end of this base tube (1) is shorter than the end of resistant material bushing pipe (3), the position of resistant material bushing pipe (3) end being exposed outside base tube (1) end is provided with overlay cladding (2), and the thickness of this overlay cladding (2) equals base tube (1) thickness.
2. composite oil pipe according to claim 1, is characterized in that: on this resistant material bushing pipe (3) end, the length exposed outside base tube (1) end is more than 15mm.
3. a compound oil casing pipes, it comprises base tube (1) and is sheathed on the resistant material bushing pipe (3) in base tube (1); It is characterized in that: the end of this base tube (1) is shorter than the end of resistant material bushing pipe (3), the position of resistant material bushing pipe (3) end being exposed outside base tube (1) end is provided with overlay cladding (2), and the thickness of this overlay cladding (2) equals base tube (1) thickness.
4. compound oil casing pipes according to claim 3, is characterized in that: on this resistant material bushing pipe (3) end, the length exposed outside base tube (1) end is more than 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520389457.6U CN204922390U (en) | 2015-06-09 | 2015-06-09 | Compound oil pipe or compound oil sleeve pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520389457.6U CN204922390U (en) | 2015-06-09 | 2015-06-09 | Compound oil pipe or compound oil sleeve pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204922390U true CN204922390U (en) | 2015-12-30 |
Family
ID=54971516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520389457.6U Expired - Fee Related CN204922390U (en) | 2015-06-09 | 2015-06-09 | Compound oil pipe or compound oil sleeve pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204922390U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191727A (en) * | 2017-05-27 | 2017-09-22 | 延安中海石油工程技术开发有限公司 | A kind of heavy antisepsis elbow bend pipe and preparation method thereof |
| CN107313724A (en) * | 2017-07-11 | 2017-11-03 | 西安向阳航天材料股份有限公司 | A kind of metallurgy type is combined oil well pipe and its manufacture method |
| CN111872385A (en) * | 2020-06-30 | 2020-11-03 | 中国石油天然气集团有限公司 | Local additive manufacturing method for threaded joint of bimetal composite oil well pipe |
-
2015
- 2015-06-09 CN CN201520389457.6U patent/CN204922390U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191727A (en) * | 2017-05-27 | 2017-09-22 | 延安中海石油工程技术开发有限公司 | A kind of heavy antisepsis elbow bend pipe and preparation method thereof |
| CN107313724A (en) * | 2017-07-11 | 2017-11-03 | 西安向阳航天材料股份有限公司 | A kind of metallurgy type is combined oil well pipe and its manufacture method |
| CN111872385A (en) * | 2020-06-30 | 2020-11-03 | 中国石油天然气集团有限公司 | Local additive manufacturing method for threaded joint of bimetal composite oil well pipe |
| CN111872385B (en) * | 2020-06-30 | 2022-06-03 | 中国石油天然气集团有限公司 | Local additive manufacturing method for threaded joint of bimetal composite oil well pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20170609 |