CN213452186U

CN213452186U - Anti-corrosion oil pipe with anti-corrosion end

Info

Publication number: CN213452186U
Application number: CN202022177505.9U
Authority: CN
Inventors: 宋峰涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-06-15
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to an anticorrosive oil pipe with corrosion-resistant end includes from the extroversion in proper order: the carbon steel tube comprises a carbon steel tube base body, wherein corrosion-resistant end heads are arranged at two ends of the carbon steel tube base body, the corrosion-resistant end heads are welded with the end parts of the carbon steel tube base body, and butt-joint welded junctions are formed at the welding positions; the sand blasting layer is arranged on the inner wall of the carbon steel pipe matrix; anticorrosive liner layer sets up inside the carbon steel pipe base member and contacts and support tightly with the sandblast layer, and anticorrosive liner layer extends along the length direction of carbon steel pipe base member, and the tip and the corrosion-resistant end seamless welding of anticorrosive bushing pipe for the inner wall and the outside of carbon steel pipe base member are isolated, and then anticorrosive bushing pipe forms corrosion-resistant overall structure with the carbon steel pipe base member. The corrosion-resistant end is welded at the end part of the carbon steel pipe base body, and the corrosion-resistant lining layer is arranged in the carbon steel pipe base body, so that the corrosion resistance of the two ends and the inner wall of the carbon steel pipe base body is enhanced, the probability that the corrosive medium corrodes the end part of the carbon steel pipe base body is reduced, the service life of an oil pipe is prolonged, and the oil exploitation cost is reduced.

Description

Anti-corrosion oil pipe with anti-corrosion end

Technical Field

The utility model relates to an oil pipe technical field particularly, relates to an anticorrosive oil pipe with corrosion-resistant end.

Background

In the technical field of petroleum machinery, along with the development of petroleum and natural gas exploration and development, the environment of oil and gas exploitation is increasingly severe and complicated. In the process of oil exploitation, chemical corrosion, electrochemical corrosion, carbon dioxide corrosion and hydrogen sulfide corrosion are very easy to occur to an oil pipe, and at present, the pipe selected for use under the well condition is mainly made of alloy materials, so that the purchase cost is very high, and the oil field exploitation cost is high.

The conventional corrosion prevention mode is to spray or electroplate the inner wall of a steel pipe needing corrosion prevention, only the corrosion prevention effect on the inner wall of the pipe body is achieved, but effective protection measures are lacked for the end opening of the pipe body, and under the high-corrosion environment, a corrosion medium is easy to corrode the end opening of the pipe body, so that threads are damaged and broken, the service life of the pipe is shortened, and the oil exploitation cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anticorrosive oil pipe with corrosion-resistant end to effectively protect oil pipe's body port, extension oil pipe life.

According to the utility model discloses an aspect provides an anticorrosive oil pipe with corrosion-resistant end, includes from the extroversion in proper order: the carbon steel tube comprises a carbon steel tube base body, wherein corrosion-resistant end heads are arranged at two ends of the carbon steel tube base body, the corrosion-resistant end heads are welded with the end parts of the carbon steel tube base body, and butt-joint welded junctions are formed at the welding positions; spout the sand bed, set up on the inner wall of carbon steel pipe base member, anticorrosive liner layer sets up inside the carbon steel pipe base member and contacts and support tightly with the sand blasting layer, anticorrosive liner layer extends along the length direction of carbon steel pipe base member, and the tip and the seamless welding of corrosion-resistant end on anticorrosive liner layer for the inner wall of carbon steel pipe base member is isolated and then with outside anticorrosive liner layer and carbon steel pipe base member form corrosion-resistant overall structure.

According to the utility model discloses, the sandblast layer sets up on the inner wall area between the butt joint crater in carbon steel pipe base member both ends.

According to the utility model discloses, corrosion-resistant end is the tubulose end structure unanimous with the pipe diameter of carbon steel pipe base member, the length of corrosion-resistant end is 10~60 mm.

According to the utility model discloses, the length of corrosion-resistant end is 25~55 mm.

According to the utility model discloses, anticorrosive bushing pipe layer extends to the outer tip of corrosion-resistant end along the length direction of carbon steel pipe base member to cover the whole areas of corrosion-resistant end inner wall, the material of anticorrosive bushing pipe is the same with the material of corrosion-resistant end.

According to the utility model discloses, interior chamfer has been seted up with the crossing department of the inner wall of corrosion-resistant end to the outer tip of corrosion-resistant end, including the crossing department welding of chamfer and anticorrosive liner layer and form the bushing pipe weld joint to the setting on anticorrosive liner layer.

According to the utility model, the anti-corrosion lining layer is a tubular structure with a framework or an anti-corrosion protective layer; the corrosion-resistant protective layer is a corrosion-resistant coating, a metal coating or a corrosion inhibitor layer; the thickness of the corrosion-resistant protective layer is 30-60 mu m.

According to the utility model discloses, be provided with the screw thread that is used for sealing connection on the week side outer wall of corrosion-resistant end.

According to the utility model discloses, be provided with the screw thread that is used for sealing connection on the week side outer wall of corrosion-resistant end, and the screw thread extends and sets up on the partial surface of the outer wall side of carbon steel pipe base member to the direction of carbon steel pipe base member.

According to the utility model discloses, be provided with the welding groove on the tip week side outer wall of corrosion-resistant end.

In summary, the present application includes at least one of the following benefits:

1) according to the method, the corrosion-resistant ends made of corrosion-resistant materials such as corrosion-resistant metals are welded at the two end parts of the carbon steel pipe base body, or the corrosion-resistant end faces are formed by surfacing, the corrosion-resistant lining layer is lined in the inner wall of the carbon steel pipe base body, then the corrosion-resistant lining layer and the corrosion-resistant ends at the two ends of the carbon steel pipe base body are welded together, so that the inner corrosion-resistant lining layer, the outer carbon steel pipe base body and the corrosion-resistant ends at the two ends form a corrosion-resistant whole, the corrosion resistance at the two ends of the carbon steel pipe base body is enhanced, the probability that corrosive media corrode an oil pipe is reduced, and the method can be.

2) This application sets up anticorrosive liner layer at the inner wall of carbon steel pipe base member, and anticorrosive liner layer adopts stainless steel, titanium or other alloy anticorrosive metal material or other anticorrosive thin film material to make, has good corrosion protection, has reduced carbon steel pipe base member inner wall and has taken place the probability of corroding, is favorable to prolonging the life of carbon steel pipe base member.

3) Welding and formation bushing pipe weld joint between interior chamfer and the anticorrosive bushing pipe layer in this application to this makes and forms a corrosion-resistant integrated part between carbon steel pipe base member inner wall, carbon steel pipe base member tip and the anticorrosive bushing pipe layer, has reduced the probability that corrosive medium from the gap infiltration between carbon steel pipe base member tip and the anticorrosive bushing pipe layer, has further strengthened the corrosion resisting property of carbon steel pipe base member.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

fig. 2 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Description of reference numerals: 1. a carbon steel tube substrate; 11. butt welding of the craters; 12. threading; 13. inner chamfering; 14. welding openings of the liner tube; 2. a corrosion-resistant end; 3. an anti-corrosion liner layer; 4. and (5) sanding a layer.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

As shown in figure 1, the utility model provides an anticorrosive oil pipe with corrosion-resistant end includes carbon steel pipe base member 1, sandblast layer 4 and anticorrosive liner layer 3 from outside-in proper order. The two ends of the carbon steel tube base body 1 are provided with corrosion-resistant end heads 2, the corrosion-resistant end heads 2 are welded with the end portions of the carbon steel tube base body 1, and butt-welding openings 11 are formed in the welding positions. Spout sand bed 4 and set up on the inner wall of carbon steel pipe base member 1, anticorrosive liner layer 3 sets up inside carbon steel pipe base member 1 and contacts and support tightly with sand blasting layer 4, and anticorrosive liner layer 3 extends along carbon steel pipe base member 1's length direction, and anticorrosive liner layer 3's tip and corrosion-resistant end 2 seamless welding for carbon steel pipe base member 1's inner wall and outside are isolated, and then anticorrosive liner layer 3 forms corrosion-resistant overall structure with carbon steel pipe base member 1.

In an embodiment of the present invention, the sand blasting layer 4 is disposed on the inner wall area between the butt weld joints 11 at the two ends of the carbon steel pipe substrate 1. In other embodiments, the corrosion-resistant lining layer 3 may also extend along the length direction of the carbon steel pipe substrate 1 to the outer end of the corrosion-resistant end head 2 and cover the entire area of the inner wall of the corrosion-resistant end head 2. The utility model discloses an anticorrosive liner layer 3's material can adopt anticorrosive metallic material such as stainless steel, titanium and high nickel alloy, has good corrosion resisting property, has reduced the probability that carbon steel pipe base member inner wall takes place to corrode, is favorable to prolonging the life of carbon steel pipe base member. Wherein, the material of the corrosion-resistant liner layer 3 is the same as that of the corrosion-resistant end head 2.

According to the utility model discloses, after corrosion-resistant end 2 has been processed at 1 both ends of carbon steel pipe base member, carry out sand blasting on carbon steel pipe base member 1's inner wall, set up dull polish layer 4. The inner wall of the carbon steel pipe base body 1 is sprayed to more than Sa2.5 level according to the spraying requirement, and the friction coefficient of the surface of the inner wall of the carbon steel pipe base body 1 is increased by arranging the frosting layer 4, so that the bonding strength of the inner wall and the anti-corrosion lining layer 3 arranged inside the inner wall is enhanced.

The corrosion-resistant lining layer 3 may be a tubular structure with a skeleton or a corrosion-resistant protective layer. Wherein, the corrosion-resistant protective layer can be a corrosion-resistant coating, a metal coating or a corrosion inhibitor layer. The inner wall of the pipe body, the port of the oil pipe and the part of threads contacted with the corrosive medium after the corrosion-resistant protective layer is sprayed or arranged form a corrosion-resistant whole, so that the corrosion resistance of the inner wall of the carbon steel pipe matrix 1 is enhanced. Preferably, the thickness of the corrosion-resistant protective layer is 30-60 μm. The corrosion-resistant coating is formed by uniformly coating corrosion-resistant coating on the inner wall of the carbon steel tube matrix 1, the frosting layer 4 and the corrosion-resistant end head 2 and curing, has good corrosion-resistant effect and slows down the corrosion rate of the inner wall of the carbon steel tube matrix.

The corrosion-resistant protective layer can be a corrosion-resistant metal coating, and the metal coating can be chromium or nickel and other alloy coatings. The corrosion-resistant metal is one of elements for improving the hydrogen sulfide resistance and the carbon dioxide resistance of the alloy steel, and the corrosion-resistant coating has good corrosion resistance and heat resistance, so that the corrosion resistance of the inner wall of the carbon steel pipe matrix is enhanced. The corrosion-resistant protective layer can also be a corrosion inhibitor layer, the corrosion inhibitor layer can be formed by uniformly coating substances such as imidazoline, organic amines, amine fatty acid salts, quaternary ammonium compounds, amide compounds or propiolic alcohol on the inner wall of the carbon steel tube matrix, and the corrosion inhibitor layer has a good corrosion inhibition effect, so that the corrosion resistance of the inner wall of the carbon steel tube matrix is greatly improved.

Preferably, an inner chamfer 13 is arranged at the intersection of the outer end of the corrosion-resistant end head 2 and the inner wall of the corrosion-resistant end head 2, and a liner crater 14 is welded and formed at the intersection of the inner chamfer 13 and the corrosion-resistant liner 3, so that the corrosion-resistant liner 3 can be embedded from the inside. Through adopting above-mentioned technical scheme, reduced the degree of difficulty that anticorrosive liner layer 3 installed in carbon steel pipe base member 3 inside, the staff can adopt modes such as mechanical spinning, blasting and high-pressure hydraulic pressure to install anticorrosive liner layer 3 in carbon steel pipe base member 1, in addition the effect of dull polish layer 4 for 3 outer walls on anticorrosive liner layer support with the inner wall of carbon steel pipe base member more tightly.

By adopting the technical scheme, the inner chamfer 13 and the anti-corrosion liner tube 3 are welded to form the liner tube welded junction 14, so that an anti-corrosion integral part is formed among the inner wall of the carbon steel tube substrate, the end part of the carbon steel tube substrate and the anti-corrosion liner tube, the probability of penetration of a corrosion medium from a gap between the end part of the carbon steel tube substrate and the anti-corrosion liner tube layer 3 is reduced, and the anti-corrosion performance of the carbon steel tube substrate is further enhanced.

Preferably, the corrosion-resistant end head 2 is a tubular end head structure consistent with the pipe diameter of the carbon steel pipe matrix 1. Preferably, the length of the corrosion-resistant end head 2 is 10-60 mm. More preferably, the length of the corrosion-resistant tip 2 is 25 to 55 mm.

In one embodiment of the present invention, the peripheral outer wall of the corrosion-resistant end head 2 is provided with a screw thread 12 for sealing connection. Through setting up the screw thread to this staff is fixed with adjacent carbon steel pipe base member connection.

In another embodiment of the present invention, the screw thread 12 for sealing connection is provided on the peripheral outer wall of the corrosion-resistant end head 2, and the screw thread 12 extends toward the carbon steel pipe base body 1 and is provided on a partial surface of the outer wall side of the carbon steel pipe base body 1.

Preferably, the outer wall of the end periphery of the corrosion-resistant end head 2 is provided with a welding groove.

The technical solution of the present invention will be further described with reference to the following specific examples.

Example 1:

as shown in fig. 1, the anti-corrosion oil pipe with the anti-corrosion end head comprises a carbon steel pipe base body 1, an anti-corrosion end head 2 and an anti-corrosion liner layer 3. The carbon steel tube substrate 1 is a circular tubular structure, and the axis of the carbon steel tube substrate is horizontal. The corrosion-resistant end 2 is of a circular ring-shaped structure, the axis of the corrosion-resistant end 2 coincides with the axis of the carbon steel pipe base body 1, the corrosion-resistant end 2 is made of corrosion-resistant metal materials, the number of the corrosion-resistant end 2 is two, the two corrosion-resistant end 2 are respectively welded with the two ends of the carbon steel pipe base body 1, and the welding positions of the corrosion-resistant end 2 and the carbon steel pipe base body 1 form a butt welding opening 11, so that the corrosion resistance of the end part of the carbon steel pipe base body 1 is enhanced.

Be provided with screw thread 12 on 1 outer wall of carbon steel pipe base member, screw thread 12 sets up on 1 outer wall of carbon steel pipe base member is close to the position of 1 tip of carbon steel pipe base member, and screw thread 12 is the external screw thread promptly, in this embodiment, all is equipped with the supporting screw thread with screw thread 12 on the outer wall of butt weld crater 11 outer wall and corrosion-resistant end 2 to this is convenient for the staff to connect two 1 tip of carbon steel pipe base member through the connector.

Anticorrosive liner layer 3 is the pipe column structure, and its axis coincides with the axis of carbon steel pipe base member 1, sets up the dull polish layer on carbon steel pipe base member 1 inner wall, and the dull polish layer is handled the gained by the staff to the sandblast of carbon steel pipe base member 1 inner wall, and the roughness on dull polish layer reaches more than Sa2.0 level, and the back is accomplished in the sandblast work, adopts dry clean compressed air to sweep the body inner wall, guarantees that 4 surperficial dustless of dull polish layers. The outer wall of the anti-corrosion liner layer 3 is tightly propped against the inner wall of the carbon steel pipe base body 1 with the frosting layer. Anticorrosive liner layer 3 adopts anticorrosive metal materials such as stainless steel, titanium or corrosion-resistant alloy to make, and the staff can adopt modes such as mechanical spinning, blasting and high-pressure hydraulic pressure to install anticorrosive liner layer 3 in carbon steel pipe base member 1 to make 3 outer walls of anticorrosive liner layer support tightly with the inner wall of carbon steel pipe base member 1, anticorrosive liner layer 3 has good corrosion protection, is favorable to strengthening carbon steel pipe base member 1's corrosion protection ability, prolongs carbon steel pipe base member 1's life.

The intersection of the outer end part of the corrosion-resistant end head 2 and the inner wall of the corrosion-resistant end head 2 is provided with an inner chamfer 13, so that the difficulty of aligning the corrosion-resistant lining layer 3 with the carbon steel pipe base body 1 is reduced, and a worker can conveniently install the corrosion-resistant lining layer 3 in the carbon steel pipe base body 1. The intersection between the inner chamfer 13 and the anti-corrosion liner layer 3 is welded to form a liner welding opening 14, so that the probability that corrosive media (such as carbon dioxide and hydrogen sulfide) enter the gap between the anti-corrosion liner layer 3 and the inner wall of the carbon steel tube substrate 1 is reduced, and the anti-corrosion performance of the carbon steel tube substrate 1 is further improved.

The use principle of the embodiment is as follows: the end part of the carbon steel tube base body 1 is welded with the corrosion-resistant end 2, and the corrosion-resistant end 2 is made of corrosion-resistant metal, so that the corrosion resistance of the two ends of the carbon steel tube base body 1 is enhanced, the probability that a corrosive medium corrodes the end part of the carbon steel tube base body 1 is reduced, the service life of the carbon steel tube base tube 1 is prolonged, and the oil exploitation cost is reduced. Anticorrosive liner layer 3 adopts anticorrosive metal materials such as stainless steel, titanium or other corrosion-resistant alloys to make, and the staff can adopt modes such as mechanical spinning, blasting and high-pressure hydraulic pressure to install anticorrosive liner layer 3 in carbon steel pipe base member 1 to make 3 outer walls of anticorrosive liner layer support tightly with 1 inner wall of carbon steel pipe base member, anticorrosive liner layer 3 has good corrosion protection, is favorable to strengthening carbon steel pipe base member 1's corrosion protection ability, prolongs carbon steel pipe base member 1's life.

Example 2:

when the anti-corrosion liner layer is the anti-corrosion protective layer, the anti-corrosion protective layer is an anti-corrosion coating, and the inner wall of the carbon steel pipe base body is sequentially provided with a frosting layer and the anti-corrosion coating. The corrosion-resistant coating is formed by uniformly coating a corrosion-resistant coating on the surface of the frosting layer. The corrosion-resistant coating has a good corrosion-resistant effect, and the corrosion-resistant performance of the inner wall of the carbon steel tube matrix is enhanced and the probability that the inner wall of the carbon steel tube matrix is corroded by a corrosive medium is reduced by the corrosion-resistant coating. In this embodiment, the frosting layer has increased the adhesive strength of carbon steel pipe base member inner wall, is favorable to strengthening the adhesive force of corrosion-resistant inoxidizing coating, reduces the probability that corrosion-resistant inoxidizing coating takes place to drop.

Example 3:

the corrosion-resistant liner layer in this embodiment is a corrosion-resistant metal plating layer, such as a chromium plating layer. Chromium is one of elements for improving the hydrogen sulfide resistance and carbon dioxide resistance of the alloy steel, and the chromium coating has good corrosion resistance and heat resistance, so that the corrosion resistance of the inner wall of the carbon steel pipe matrix is enhanced. The corrosion-resistant metal coating has good corrosion resistance and heat resistance, and can improve the protective capability of the alloy steel on hydrogen sulfide and carbon dioxide resistance, so that the corrosion resistance of the inner wall of the carbon steel pipe matrix is enhanced.

Example 4:

the corrosion-resistant liner layer of the embodiment is a corrosion inhibitor layer, the corrosion inhibitor layer can be formed by uniformly coating substances such as imidazoline, organic amines, amine fatty acid salts, quaternary ammonium compounds, amide compounds, propiolic alcohol and the like on the inner wall of the carbon steel pipe matrix, and the corrosion inhibitor layer has a good corrosion inhibition effect, so that the corrosion resistance of the inner wall of the carbon steel pipe matrix is greatly improved.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. An anti-corrosion oil pipe with an anti-corrosion end head is characterized in that: comprises the following components in sequence from outside to inside:

the carbon steel tube comprises a carbon steel tube base body (1), wherein corrosion-resistant end heads (2) are arranged at two ends of the carbon steel tube base body (1), the corrosion-resistant end heads (2) are welded with the end part of the carbon steel tube base body (1), and a butt-joint welding opening (11) is formed at the welding position;

the sand blasting layer (4) is arranged on the inner wall of the carbon steel pipe matrix (1);

anticorrosive liner layer (3), set up carbon steel pipe base member (1) inside and with spout sand bed (4) and contact and support tightly, anticorrosive liner layer (3) are followed the length direction of carbon steel pipe base member (1) extends, just the tip of anticorrosive liner layer (3) with corrosion-resistant end (2) seamless welding makes the inner wall and the outside of carbon steel pipe base member (1) are isolated, and then anticorrosive liner layer (3) with carbon steel pipe base member (1) forms corrosion-resistant overall structure.

2. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: the sand blasting layer (4) is arranged on the inner wall area between the butt welding openings (11) at the two ends of the carbon steel pipe matrix (1).

3. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: the corrosion-resistant end head (2) is of a tubular end head structure consistent with the pipe diameter of the carbon steel pipe base body (1), and the length of the corrosion-resistant end head (2) is 10-60 mm.

4. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 3, wherein: the length of the corrosion-resistant end head (2) is 25-55 mm.

5. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: the anti-corrosion lining pipe layer (3) extends to the outer end part of the anti-corrosion end head (2) along the length direction of the carbon steel pipe base body (1) and covers the whole area of the inner wall of the anti-corrosion end head (2), and the material of the anti-corrosion lining pipe layer (3) is the same as that of the anti-corrosion end head (2).

6. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: an inner chamfer (13) is formed at the intersection of the outer end part of the corrosion-resistant end head (2) and the inner wall of the corrosion-resistant end head (2), and a liner welding opening (14) is formed at the intersection of the inner chamfer (13) and the corrosion-resistant liner layer (3) in a welding mode so as to facilitate the setting of the corrosion-resistant liner layer (3).

7. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: the anti-corrosion lining layer (3) is of a tubular structure with a framework or an anti-corrosion protective layer; the corrosion-resistant protective layer is a corrosion-resistant coating, a metal coating or a corrosion inhibitor layer; the thickness of the corrosion-resistant protective layer is 30-60 mu m.

8. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: and screw threads (12) for sealing connection are arranged on the peripheral side outer wall of the corrosion-resistant end head (2).

9. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: the peripheral side outer wall of the corrosion-resistant end head (2) is provided with a screw thread (12) for sealing connection, and the screw thread (12) extends towards the direction of the carbon steel pipe base body (1) and is arranged on the partial surface of the outer wall side of the carbon steel pipe base body (1).

10. The corrosion resistant oil pipe with corrosion resistant end head as claimed in claim 1, wherein: and a welding groove is arranged on the outer wall of the periphery of the end part of the corrosion-resistant end head (2).