High-resistance coating anti-corrosion oil pipe for high salinity and high carbon dioxide

Abstract

The utility model discloses an anti-corrosion oil pipe with a high-resistance coating for high salinity and high carbon dioxide, which relates to the technical field of anti-corrosion oil pipes and comprises an anti-corrosion oil pipe, a flange plate is sleeved at the end of the anti-corrosion oil pipe, and through holes distributed along the circumference of the anti-corrosion oil pipe in an array manner are arranged on the flange plate. A connecting oil pipe is arranged between every two adjacent anti-corrosion oil pipes, the two ends of each connecting oil pipe are inserted into the corresponding anti-corrosion oil pipes respectively, containing grooves are formed in the ends of the anti-corrosion oil pipes, metal sealing rings are arranged in the containing grooves, and the connecting oil pipes are sleeved with the metal sealing rings. The pressing mechanism is adopted for abutting connection, compared with traditional bolt connection, the pressing mechanism is more convenient to use, and the connection stability is improved in a double-locking mode; meanwhile, due to the unique design of the W-shaped metal sealing ring, the sealing effect is remarkably improved, the contact area is increased, the sealing reliability is ensured, and leakage is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of anti-corrosion oil pipe technology, and in particular to an anti-corrosion oil pipe with a high resistance coating for high mineralization and high carbon dioxide. Background Technology

[0002] In oil and gas well environments with high salinity and high carbon dioxide levels, tubing faces severe corrosion challenges. The corrosive medium formed by carbon dioxide and highly salinized water accelerates the corrosion process, potentially leading to perforation, cracking, and other safety hazards, seriously affecting normal oilfield production. To address this harsh corrosive environment, high-resistance coated anti-corrosion tubing has been developed. This type of tubing improves corrosion resistance by coating its surface with a layer of coating that offers excellent corrosion resistance. The tubing can maintain stable corrosion resistance over long periods, ensuring normal oilfield production. This tubing has been widely used in major oilfields across China.

[0003] In oil and gas well environments with high salinity and high carbon dioxide levels, high-resistance coated anti-corrosion tubing is often connected using flanges or threaded pipes. When two adjacent anti-corrosion tubings are connected by flanges, gaps are easily left at the connection point, affecting the sealing performance, and tightening multiple fixing bolts is very cumbersome. When two adjacent anti-corrosion tubings are connected by threaded pipes, vibration can cause the threaded pipes to loosen, affecting the stability of the connection between the two adjacent anti-corrosion tubings. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a highly resistant coating for corrosion-resistant oil pipes with high mineralization and high carbon dioxide content.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-resistance anti-corrosion coating for oil pipes with high mineralization and high carbon dioxide content includes an anti-corrosion oil pipe, an end of which is fitted with a flange, and through holes arranged in an array along the circumference of the anti-corrosion oil pipe on the flange. A connecting oil pipe is provided between two adjacent anti-corrosion oil pipes, and the two ends of the connecting oil pipe are respectively inserted into the corresponding anti-corrosion oil pipe. A receiving groove is opened at the end of the anti-corrosion oil pipe, and a metal sealing ring is provided in the receiving groove. The metal sealing ring is fitted onto the connecting oil pipe. A mounting base is fixedly fitted onto the connecting oil pipe. A positioning rod that matches the through hole and can be inserted into the through hole is fixedly connected to the side of the mounting base. A clamping mechanism is provided in the mounting base to lock the flange and the connecting oil pipe.

[0007] Preferably, the metal sealing ring is a W-shaped sealing ring, and an elastic sealing ring is fitted around the outer ring of the W-shaped sealing ring.

[0008] Preferably, the clamping mechanism includes a bidirectional screw rotatably disposed in the mounting base, two nuts threadedly connected to the bidirectional screw at intervals, a ring fixedly connected to the outer wall of each of the two nuts, a connecting rod fixedly connected to the side of the ring, and a pressure ring fixedly connected to the end of the connecting rod away from the nut through the mounting base.

[0009] Preferably, the inner diameter of the pressure ring is the same as the diameter of the positioning rod, and the inner diameter of the pressure ring and the positioning rod are coaxially arranged.

[0010] Preferably, a worm gear located at the middle position of the bidirectional screw is fixedly sleeved on the bidirectional screw, and an adjusting shaft is rotatably provided on the mounting base, with a worm gear meshing with the worm gear fixedly sleeved on the outer wall of the adjusting shaft.

[0011] Preferably, the end of the adjusting shaft is provided with an internal hexagonal adjustment hole.

[0012] Preferably, a limiting rod that passes through a circular ring is fixedly connected inside the mounting base, and the number of connecting rods is at least two and they are distributed in an array along the circumference of the connecting oil pipe.

[0013] Preferably, reinforcing ribs are fixedly connected to the inner rings at both ends of the connecting oil pipe, and the reinforcing ribs have a triangular structure.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. In this application, the connection between the anti-corrosion pipe and the connecting pipe is achieved by the clamping mechanism through a pressing method, which is more convenient than the traditional method of tightening multiple fixing bolts; at the same time, the nut and the double screw are locked by threads, and the worm and the worm wheel also have self-locking performance. The double locking method replaces the single thread connection method, so the connection is more stable and less prone to loosening.

[0016] 2. In this application, the unique W-shaped metal sealing ring design significantly improves the sealing effect and increases the contact area, thereby ensuring the reliability of the seal. At the same time, the elasticity and adaptability of the elastic sealing ring allow it to fit tightly between the mating surfaces. The combined design greatly enhances the sealing effect, effectively prevents leakage, and strengthens the reliability of the seal. Attached Figure Description

[0017] Figure 1 This utility model presents a three-dimensional structural schematic diagram of a highly resistant coated anti-corrosion oil pipe with high mineralization and high carbon dioxide content.

[0018] Figure 2 This utility model provides a partial cross-sectional schematic diagram of a highly resistant coated anti-corrosion oil pipe with high mineralization and high carbon dioxide content.

[0019] Figure 3 This invention proposes a highly resistant coating for corrosion-resistant oil pipes with high salinity and high carbon dioxide content. Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This utility model provides a partial cross-sectional view of the mounting base for a highly resistant coated anti-corrosion oil pipe with high mineralization and high carbon dioxide content.

[0021] Figure 5 This utility model presents a schematic diagram of a corrosion-resistant oil pipe structure with a high-resistance coating for high mineralization and high carbon dioxide content.

[0022] Legend: 100, anti-corrosion oil pipe; 101, flange; 102, through hole; 103, receiving groove; 200, connecting oil pipe; 201, reinforcing rib; 300, metal sealing ring; 301, elastic sealing ring; 400, mounting base; 401, limit rod; 500, positioning rod; 600, clamping mechanism; 601, double-acting screw; 602, nut; 603, ring; 604, connecting rod; 605, pressure ring; 606, worm gear; 607, adjusting shaft; 608, worm; 609, internal hexagonal adjustment hole. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] like Figure 1-5As shown, this utility model provides a highly resistant coated anti-corrosion oil pipe for high mineralization and high carbon dioxide content. It includes an anti-corrosion oil pipe 100, with a flange 101 fitted at one end. The flange 101 has through holes 102 arranged in an array along the circumference of the anti-corrosion oil pipe 100. A connecting oil pipe 200 is provided between two adjacent anti-corrosion oil pipes 100. The surfaces of the anti-corrosion oil pipe 100 and the connecting oil pipe 200 are coated with a layer of coating with excellent corrosion resistance to improve the corrosion resistance of the oil pipe. The coating material is usually selected from alloys or composite materials with high corrosion resistance, and advanced coating processes such as electroplating and hot-dip galvanizing are used. This makes it suitable for oil and gas well environments with high mineralization and high carbon dioxide. The two ends of the connecting oil pipe 200 are respectively inserted into the corresponding anti-corrosion oil pipe 100. The end of the anti-corrosion oil pipe 100 is provided with a receiving groove 103. A metal sealing ring 300 is provided in the receiving groove 103. The metal sealing ring 300 is sleeved on the connecting oil pipe 200. A mounting base 400 is fixedly sleeved on the connecting oil pipe 200. A positioning rod 500 that matches the through hole 102 and can be inserted into the through hole 102 is fixedly connected to the side of the mounting base 400. A clamping mechanism 600 is provided in the mounting base 400 to lock the flange 101 and the connecting oil pipe 200.

[0026] In this embodiment, the metal sealing ring 300 is a W-shaped sealing ring, with an elastic sealing ring 301 fitted around its outer ring. The unique W-shaped design of the metal sealing ring 300 increases the contact area between the surface of the connecting oil pipe 200, the surface of the mounting base 400, and the inner wall of the receiving groove 103, thereby improving the sealing effect and providing excellent sealing performance. It also has high hardness and strength, enabling it to more effectively resist fluid pressure and ensure the reliability of the seal. Furthermore, by selecting corrosion-resistant metal materials, such as Hastelloy, the W-shaped sealing ring can resist the erosion of various chemical substances, which is a significant advantage when handling corrosive fluids in the chemical and petroleum industries. In conjunction with the elastic sealing ring 301, the elasticity and adaptability of the elastic sealing ring 301 fill these tiny gaps, ensuring the integrity of the seal. It can tightly fit between the metal sealing ring 300 and the mating surface, effectively preventing the leakage of liquids, gases, or solid particles, and significantly improving the reliability of the entire sealing system.

[0027] In this embodiment, the clamping mechanism 600 includes a bidirectional screw 601 rotatably disposed within the mounting base 400. Two nuts 602 are threadedly connected to the bidirectional screw 601 at intervals. A ring 603 is fixedly connected to the outer wall of each of the two nuts 602. A connecting rod 604 is fixedly connected to the side of the ring 603. The end of the connecting rod 604 away from the nut 602 passes through the mounting base 400 and is fixedly connected to a pressure ring 605. Rotation of the bidirectional screw 601 causes the nut 602 to drive the ring 603 to move along the length of the bidirectional screw 601. The ring 603 drives the connecting rod 604 to move the pressure ring 605, thereby pressing the pressure ring 605 against the flange 101.

[0028] In this embodiment, the inner diameter of the pressure ring 605 is the same as the diameter of the positioning rod 500. The inner ring of the pressure ring 605 and the positioning rod 500 are coaxially arranged. The pressure ring 605 can cooperate with the positioning rod 500 during movement, and the pressure ring 605 can ensure that it acts on the flange 101.

[0029] In this embodiment, a worm gear 606 located in the middle of the bidirectional screw 601 is fixedly sleeved on the bidirectional screw 601. An adjusting shaft 607 is rotatably provided on the mounting base 400. A worm 608 that meshes with the worm gear 606 is fixedly sleeved on the outer wall of the adjusting shaft 607. The worm 608 is rotated by rotating the adjusting shaft 607, and the worm 608 drives the worm gear 606 to rotate the bidirectional screw 601. The worm 608 and the worm gear 606 have a self-locking capability.

[0030] In this embodiment, the end of the adjusting shaft 607 is provided with an internal hexagonal adjustment hole 609, through which the adjusting shaft 607 can be easily adjusted.

[0031] In this embodiment, a limiting rod 401 that passes through the circular ring 603 is fixedly connected inside the mounting base 400. The number of connecting rods 604 is at least two and they are distributed in a circumferential array along the connecting oil pipe 200. The limiting rod 401 makes the circular ring 603 move stably.

[0032] In this embodiment, reinforcing ribs 201 are fixedly connected to the inner rings at both ends of the connecting oil pipe 200. The reinforcing ribs 201 have a triangular structure. The reinforcing ribs 201 can strengthen the strength of the connecting oil pipe 200 and also support the anti-corrosion oil pipe 100 during installation, thereby improving the connection strength.

[0033] How to use and how to work this device:

[0034] In use, the device is first fitted with a metal sealing ring 300 onto the connecting oil pipe 200, and an elastic sealing ring 301 onto the metal sealing ring 300. The anti-corrosion oil pipe 100 and the connecting oil pipe 200 are then connected, with the anti-corrosion oil pipe 100 wrapping around the connecting oil pipe 200. During connection, the through hole 102 on the flange 101 aligns with the positioning rod 500, allowing the positioning rod 500 to be inserted into the through hole 102 to position the anti-corrosion oil pipe 100. Subsequently, a hex wrench is used to rotate the adjusting shaft 607. The adjusting shaft 607 drives the worm gear 608 to rotate, which engages with the worm wheel 606. The worm wheel 606 drives the double-acting screw 601 to rotate. Rotation via threaded transmission causes nut 602 to move ring 603, which in turn drives connecting rod 604 to move pressure ring 605. Pressure ring 605 contacts and pushes flange 101, causing flange 101 to press against the end face of mounting base 400. During this process, metal sealing ring 300 is squeezed into receiving groove 103. Metal sealing ring 300 increases the contact area between the surface of connecting oil pipe 200, the surface of mounting base 400, and the inner wall of receiving groove 103. At the same time, the elasticity and adaptability of elastic sealing ring 301 fills the small gaps, resulting in excellent sealing performance, good sealing effect, and ensuring the integrity of the seal, effectively preventing leakage.

[0035] In summary, the above installation method is more convenient than tightening multiple fixing bolts. The connection is sealed by a metal sealing ring 300 and an elastic sealing ring 301, which improves the sealing performance of the connection. After installation, the nut 602 and the double-ended screw 601 are locked together by threads, and the worm 608 and the worm wheel 606 also have self-locking properties. Therefore, the anti-corrosion oil pipe 100 will use a double locking method instead of a single threaded connection method when vibrating, which is not easy to loosen and improves the stability of the connection.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A high-resistance coated anti-corrosion oil pipe for high mineralization and high carbon dioxide content, comprising an anti-corrosion oil pipe (100), wherein a flange (101) is fitted at the end of the anti-corrosion oil pipe (100), and the flange (101) is provided with through holes (102) arranged in an array along the circumference of the anti-corrosion oil pipe (100), characterized in that: A connecting oil pipe (200) is provided between two adjacent anti-corrosion oil pipes (100). The two ends of the connecting oil pipe (200) are respectively inserted into the corresponding anti-corrosion oil pipe (100). A receiving groove (103) is opened at the end of the anti-corrosion oil pipe (100). A metal sealing ring (300) is provided in the receiving groove (103). The metal sealing ring (300) is sleeved on the connecting oil pipe (200). A mounting base (400) is fixedly sleeved on the connecting oil pipe (200). A positioning rod (500) that matches the through hole (102) and can be inserted into the through hole (102) is fixedly connected to the side of the mounting base (400). A clamping mechanism (600) is provided in the mounting base (400) to lock the flange (101) and the connecting oil pipe (200).

2. The high-resistance coated anti-corrosion oil pipe for high salinity and high carbon dioxide content according to claim 1, characterized in that: The metal sealing ring (300) is a W-shaped sealing ring, and an elastic sealing ring (301) is fitted around the outer ring of the W-shaped sealing ring.

3. The high-resistance coated anti-corrosion oil pipe for high salinity and high carbon dioxide content according to claim 1, characterized in that: The clamping mechanism (600) includes a bidirectional screw (601) rotatably disposed in the mounting base (400). Two nuts (602) are threadedly connected to the bidirectional screw (601) at intervals. A ring (603) is fixedly connected to the outer wall of each of the two nuts (602). A connecting rod (604) is fixedly connected to the side of the ring (603). The end of the connecting rod (604) away from the nut (602) passes through the mounting base (400) and is fixedly connected to a pressure ring (605).

4. The high-resistance coated anti-corrosion oil pipe for high salinity and high carbon dioxide content as described in claim 3, characterized in that: The inner diameter of the pressure ring (605) is the same as the diameter of the positioning rod (500), and the inner ring of the pressure ring (605) and the positioning rod (500) are coaxially arranged.

5. The high-resistance coated anti-corrosion oil pipe for high salinity and high carbon dioxide as described in claim 3, characterized in that: A worm gear (606) located in the middle of the bidirectional screw (601) is fixedly sleeved on the bidirectional screw (601). An adjusting shaft (607) is rotatably provided on the mounting base (400). A worm (608) that meshes with the worm gear (606) is fixedly sleeved on the outer wall of the adjusting shaft (607).

6. The high-resistance coated anti-corrosion oil pipe for high salinity and high carbon dioxide as described in claim 5, characterized in that: The end of the adjusting shaft (607) is provided with an internal hexagonal adjusting hole (609).

7. The high-resistance coated anti-corrosion oil pipe for high salinity and high carbon dioxide content according to claim 3, characterized in that: The mounting base (400) is fixedly connected to a limiting rod (401) that passes through a circular ring (603), and the number of connecting rods (604) is at least two and distributed in an array around the circumference of the connecting oil pipe (200).

8. The high-resistance coated anti-corrosion oil pipe for high salinity and high carbon dioxide content according to claim 1, characterized in that: Reinforcing ribs (201) are fixedly connected to the inner rings at both ends of the connecting oil pipe (200), and the reinforcing ribs (201) are triangular in structure.

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