Fiber oil pipe for oil field

Abstract

The utility model relates to the technical field of oil pipes, in particular to a fiber oil pipe for an oil field. The fiber oil pipe for the oil field comprises a lining pipe and a protective casing pipe arranged on the lining pipe in a sleeving mode, the protective casing pipe is provided with a plurality of spiral grooves which are annularly distributed and spirally arranged along the outer pipe face of the protective casing pipe, and spiral steel bars are embedded in the spiral grooves. According to the fiber oil pipe for the oil field, the overall strength of the protective sleeve is enhanced by embedding the spiral steel bars in the protective sleeve, and the spiral steel bars are of a spiral structure and have certain elasticity, so that when the protective sleeve is subjected to stretching or compressing force, the spiral steel bars can counteract part of external stress, and the service life of the protective sleeve is prolonged. The steel balls are arranged, on one hand, the oil pipe can be supported, the situation that the oil pipe is directly in contact with the ground in the transportation or installation process, and consequently the oil pipe is abraded is avoided, on the other hand, the friction force between the oil pipe and the ground in the installation process can be reduced, and workers can conveniently conduct fine adjustment on the oil pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pipes, in particular to a fiber oil pipe for oil fields. Background Art

[0002] Fiber oil pipes are oil pipes with fiber materials added to them to enhance their performance. According to the different fiber materials and manufacturing processes, fiber oil pipes can be divided into many types, such as nylon fiber oil pipes, carbon fiber oil pipes, fiber braided oil pipes, etc., and the fiber oil pipes generally used in oil fields are of various types, such as fiber reinforced oil pipes, fiber braided oil pipes, and fiber reinforced continuous composite pipes, etc. However, the fiber oil pipes currently used in oil fields have poor compression or tensile resistance, which can easily cause the pipe body to be damaged by tension or pressure (referring to the pressure along the axial direction of the pipe body), and the current oil pipes are directly in contact with the ground during transportation or installation, causing wear.

[0003] Therefore, it is necessary to provide a new fiber oil pipe for oil field to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a fiber oil pipe for oil fields.

[0005] The fiber oil pipe for oil field provided by the utility model comprises an inner liner pipe and a protective sleeve pipe sleeved on the inner liner pipe, wherein the protective sleeve pipe is provided with a plurality of spiral grooves which are distributed in an annular manner and are spirally arranged along the outer pipe surface of the protective sleeve pipe, and a spiral steel bar is embedded in each of the spiral grooves;

[0006] The spiral steel bar is composed of a spiral interlocking plate portion and a spiral T-shaped plate, the spiral interlocking plate portion is fixedly interlocked in the spiral groove, the vertical plate of the spiral T-shaped plate is fixedly connected to the spiral interlocking plate portion, and the horizontal plate of the spiral T-shaped plate extends out of the spiral groove and fits with the outer pipe surface of the inner liner pipe;

[0007] A plurality of steel balls of the same specification are embedded on the horizontal plate of the spiral T-shaped plate.

[0008] Preferably, the plurality of steel balls are rotationally connected to the horizontal plate of the spiral T-shaped plate and are spirally distributed along the horizontal plate.

[0009] Preferably, it also includes a central steel ring, wherein a plurality of the central steel rings are provided, and the plurality of central steel rings are all sleeved on the casing pipe and distributed equidistantly, and the central steel ring is fixedly connected to the spiral T-plate of the spiral steel bar on the casing pipe.

[0010] Preferably, the inner lining pipe includes a glass lining layer, a heat insulation layer is fixedly sleeved on the glass lining layer, and an anti-corrosion layer is coated on the heat insulation layer, a glass fiber layer is fixedly sleeved on the anti-corrosion layer, and the glass fiber layer is fixedly connected to the inner pipe wall of the sheath pipe.

[0011] Preferably, the heat insulation layer is made of ultra-fine glass wool, and the anti-corrosion layer is made of epoxy resin paint.

[0012] Preferably, the inner wall of the liner pipe is coated with a polyurethane coating, and the outer wall of the jacket pipe is sprayed with an RTV anti-pollution flashover coating.

[0013] Compared with the related art, the fiber oil pipe for oil field provided by the utility model has the following beneficial effects:

[0014] 1. The sheath pipe in the utility model is embedded with a spiral steel bar to enhance the overall strength of the sheath pipe. Since the spiral steel bar is a spiral structure with a certain elasticity, when the sheath pipe is subjected to tension or compression, the spiral steel bar can offset part of the external stress, thereby greatly improving the tensile and compressive resistance of the sheath pipe;

[0015] 2. The steel balls provided in the utility model can, on the one hand, hold up the oil pipe to prevent the oil pipe from directly contacting the ground during transportation or installation and causing wear of the oil pipe; on the other hand, the steel balls can reduce the friction between the oil pipe and the ground during installation, making it convenient for the staff to fine-tune the oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of a fiber oil pipe for oil fields provided by the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the sheath tube shown;

[0018] Figure 3 for Figure 1 The schematic diagram of the structure of the spiral steel bar shown;

[0019] Figure 4 for Figure 3 A schematic diagram of a partially enlarged structure of a spiral steel bar shown;

[0020] Figure 5 for Figure 1 Schematic diagram of the structure of the liner pipe shown.

[0021] Numbers in the figure: 1. Inner lining pipe; 101. Glass lining layer; 102. Heat insulation layer; 103. Anti-corrosion layer; 104. Glass fiber layer; 2. Sheath pipe; 2a. Spiral groove; 3. Spiral steel bar; 31. Spiral interlocking plate; 32. Spiral T-plate; 4. Central steel ring; 5. Steel ball. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] See also Figures 1 to 5 The utility model provides a fiber oil pipe for oil fields, which includes an inner liner pipe 1 and a jacket pipe 2.

[0025] In the embodiments of the present invention, please refer to Figure 1 and Figure 5 A sheath pipe 2 is sleeved on the inner lining pipe 1, and the inner lining pipe 1 includes a glass lining layer 101, and a heat insulation layer 102 is fixedly sleeved on the glass lining layer 101, and the heat insulation layer 102 is made of ultra-fine glass wool, and an anti-corrosion layer 103 is coated on the heat insulation layer 102, and the anti-corrosion layer 103 is made of epoxy resin paint, and a glass fiber layer 104 is fixedly sleeved on the anti-corrosion layer 103, and the glass fiber layer 104 is fixedly connected to the inner pipe wall of the sheath pipe 2.

[0026] It should be noted that the glass lining layer 101 has the characteristics of being hydrophilic, oleophobic and having a smooth surface, which can effectively prevent wax deposition, and the thermal insulation layer 102 made of ultra-fine glass wool has good thermal insulation performance and can effectively reduce heat transfer. The epoxy resin coating improves the corrosion resistance of the inner lining pipe 1, and the glass fiber layer 104 has the characteristics of high strength and high modulus, which can effectively improve the tensile and compressive properties of the oil pipe.

[0027] Furthermore, the inner wall of the liner pipe 1 is coated with a polyurethane coating. After the polyurethane coating is coated and cured on the inner wall of the oil pipe, the inner wall surface of the oil pipe becomes smooth and highly hydrophilic, thereby improving the smoothness of the pipe wall and improving the wettability of the pipe wall surface to make it hydrophilic and oleophobic, making it difficult for wax to deposit on the pipe wall surface, thereby achieving the purpose of wax prevention and reducing the hidden danger of the inner diameter of the oil pipe becoming smaller and the fluid flow resistance increasing due to the deposition of crystals on the pipe surface of the liner pipe 1.

[0028] Furthermore, the outer wall of the jacket pipe 2 is sprayed with RTV anti-fouling flashover coating, so that the jacket pipe 2 has excellent hydrophobicity and fast, balanced and lasting hydrophobic migration. In bad weather, no continuous water film is formed on the coating surface. At the same time, the jacket pipe 2 is also enhanced in terms of acid, alkali, salt and strong oxidant corrosion resistance.

[0029] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The jacket tube 2 is provided with a plurality of spiral grooves 2a which are distributed in an annular manner and are spirally arranged along the outer tube surface of the jacket tube 2, and a spiral steel bar 3 is embedded in each of the spiral grooves 2a, and the spiral steel bar 3 is composed of a spiral embedding plate portion 31 and a spiral T-shaped plate 32, the spiral embedding plate portion 31 is fixedly embedded in the spiral groove 2a, the vertical plate of the spiral T-shaped plate 32 is fixedly connected to the spiral embedding plate portion 31, and the horizontal plate of the spiral T-shaped plate 32 extends out of the spiral groove 2a and fits with the outer tube surface of the inner liner pipe 1.

[0030] It should be noted that the sheath tube 2 is embedded with the spiral steel bar 3 to enhance the overall strength of the sheath tube 2. Since the spiral steel bar 3 is a spiral structure with a certain elasticity, when the sheath tube 2 is subjected to tension or compression, the spiral steel bar 3 can offset part of the external stress, thereby greatly improving the tensile and compressive resistance of the sheath tube 2.

[0031] Among them, a plurality of steel balls 5 of the same specifications are embedded on the horizontal plate of the spiral T-plate 32. On the one hand, the steel balls 5 can hold up the oil pipe to prevent the oil pipe from directly contacting the ground during transportation or installation and causing wear of the oil pipe. On the other hand, the steel balls 5 can reduce the friction between the oil pipe and the ground during installation, making it convenient for the staff to fine-tune the oil pipe.

[0032] Furthermore, the fiber oil pipe for oil fields also includes a central steel ring 4, of which a plurality of central steel rings 4 are provided, and the plurality of central steel rings 4 are all sleeved on the casing pipe 2 and distributed equidistantly, and the central steel ring 4 is fixedly connected to the spiral T-plate 32 of the spiral steel bar 3 on the casing pipe 2, and the central steel ring 4 improves the connection strength between the spiral steel bars 3 on the casing pipe 2, and forms a cage-like structure with the spiral steel bars 3, thereby greatly improving the compressive strength of the oil pipe.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fiber oil pipe for oil fields, comprising an inner liner pipe (1) and a sheath pipe (2) sleeved on the inner liner pipe (1), characterized in that: The sheath tube (2) is provided with a plurality of spiral grooves (2a) distributed in an annular manner and arranged spirally along the outer tube surface of the sheath tube (2), and a spiral steel bar (3) is embedded in each of the spiral grooves (2a); The spiral steel bar (3) is composed of a spiral interlocking plate portion (31) and a spiral T-shaped plate (32), wherein the spiral interlocking plate portion (31) is fixedly interlocked in the spiral groove (2a), the vertical plate of the spiral T-shaped plate (32) is fixedly connected to the spiral interlocking plate portion (31), and the horizontal plate of the spiral T-shaped plate (32) extends out of the spiral groove (2a) and fits with the outer pipe surface of the inner liner pipe (1); A plurality of steel balls (5) of the same specification are embedded on the horizontal plate of the spiral T-shaped plate (32).

2. The fiber oil pipe for oil field according to claim 1, characterized in that: The plurality of steel balls (5) are rotatably connected to the horizontal plate of the spiral T-shaped plate (32) and are spirally distributed along the horizontal plate.

3. The fiber oil pipe for oil field according to claim 1, characterized in that: It also comprises a central steel ring (4), wherein a plurality of the central steel rings (4) are provided, and the plurality of central steel rings (4) are sleeved on the sheath pipe (2) and are equidistantly distributed, and the central steel ring (4) is fixedly connected to the spiral T-shaped plate (32) of the spiral steel strip (3) on the sheath pipe (2).

4. The fiber oil pipe for oil field according to claim 1, characterized in that: The inner lining pipe (1) comprises a glass lining layer (101), a heat insulating layer (102) is fixedly sleeved on the glass lining layer (101), an anti-corrosion layer (103) is coated on the heat insulating layer (102), a glass fiber layer (104) is fixedly sleeved on the anti-corrosion layer (103), and the glass fiber layer (104) is fixedly connected to the inner pipe wall of the jacket pipe (2).

5. The fiber oil pipe for oil field according to claim 4, characterized in that: The heat insulation layer (102) is made of ultra-fine glass wool material, and the anti-corrosion layer (103) is made of epoxy resin paint.

6. The fiber oil pipe for oil field according to claim 1, characterized in that: The inner pipe wall of the liner pipe (1) is coated with a polyurethane coating, and the outer pipe wall of the jacket pipe (2) is sprayed with an RTV anti-fouling flashover coating.

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