Connecting structure of composite material oil pipe

Abstract

The utility model discloses a connecting structure of a composite material oil pipe, which comprises a connecting part I arranged at one end of the composite material oil pipe and a connecting part II arranged at the other end of the composite material oil pipe, connecting holes are formed in the peripheries of the end surfaces of the connecting part I and the connecting part II, and a plurality of L-shaped bulges are arranged on the end surface of the connecting part I; a plurality of grooves allowing the protrusions to stretch into are formed in the surface of the connecting part II, the protrusions and the grooves are located between every two adjacent connecting holes, and a cavity consistent with the extending ends of the tops of the protrusions in shape is formed in one side wall of each groove; wherein the protrusion extends into the groove, the oil pipe is rotated to enable the extending end of the protrusion to extend into the cavity to be locked, and then the connecting holes of the connecting part I and the connecting part II are aligned in space. The oil pipe connector has the advantages that the L-shaped protrusions designed on the connecting part I are matched with the corresponding grooves and cavities in the connecting part II, so that oil pipes are connected and quickly locked, and follow-up workers can conveniently connect the oil pipes.

Description

Technical Field

[0001] This utility model relates to the field of oil well tubing, and in particular to a connection structure for composite material tubing. Background Technology

[0002] Composite material structure oil well tubing is a commonly used pipeline material in the petroleum industry. It is made of composite materials and has excellent performance and characteristics. Oil well tubing is a pipeline system used in oil exploration and production to transport fluids such as oil and natural gas. It is a key component connecting the wellhead and the underground reservoir. An oil well is a borehole structure used to extract oil or natural gas from underground reservoirs. It is a key component in the oil exploration and production process.

[0003] Existing pipelines cannot be positioned during connection, requiring manual alignment and bolting. Alternatively, the pipelines may be positioned manually, but vibrations during connection can cause them to separate, necessitating re-connection. For example, a composite material structure oil well tubing disclosed in patent application CN202322018447.9 cannot be locked after the clamps and grooves are aligned. This forces workers to manually lift the tubing and tighten multiple bolts on the tubing flange to complete the connection. This compromises connection efficiency. Utility Model Content

[0004] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0005] To achieve these objectives and other advantages according to the present invention, a connection structure for a composite material oil pipe is provided, comprising: a connection part I disposed at one end of the composite material oil pipe, and a connection part II disposed at the other end of the composite material oil pipe. Connection holes are provided around the end faces of the connection part I and the connection part II. The end face of the connection part I is provided with a plurality of L-shaped protrusions. The surface of the connection part II is provided with a plurality of grooves into which the protrusions extend. Each protrusion and groove is located between two adjacent connection holes. A cavity with the same shape as the extended end of the top of the protrusion is provided on one side wall of the groove.

[0006] Wherein, the protrusion extends into the groove, and after the oil pipe is rotated so that the extended end of the protrusion extends into the cavity and locks, the connecting holes of the connecting part I and the connecting part II are aligned in space.

[0007] Preferably, the tubes are connected into a single structure by fasteners passing through the connection holes.

[0008] Preferably, at least one annular groove is provided on the contact surface between the connecting part I and the connecting part II of the other pipe.

[0009] The annular groove is provided with a sealing ring of a matching size.

[0010] Preferably, the outer wall of the composite material tubing is provided with a wear-resistant layer.

[0011] Preferably, an insulation layer is provided on the inner side of the wear-resistant layer, and the insulation layer is configured as an aerogel felt.

[0012] Preferably, the inner side of the insulation layer is provided with a pressure-resistant layer, which is formed by sequentially spirally winding PET polyester filaments.

[0013] This utility model has at least the following beneficial effects: by designing an L-shaped protrusion on the connecting part I and a corresponding groove and cavity on the connecting part II, the connection between oil pipes is realized and quickly locked, which facilitates subsequent connection of oil pipes by subsequent personnel.

[0014] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached image description:

[0015] Figure 1 This is a diagram showing the connection relationship between the oil pipes of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of connecting part I;

[0017] Figure 3 This is a schematic diagram of the spatial structure of the connecting part II;

[0018] Figure 4 This is a schematic diagram of the groove and cavity structure of the connecting part II;

[0019] Figure 5 This is a cross-sectional view of the composite tubing.

[0020] Figure 6 This is a schematic diagram showing the spatial fit between the annular groove and the sealing ring.

[0021] The markings in the diagram are: 1. Oil pipe, 2. Connector I, 3. Connector II, 4. Connecting hole, 5. Protrusion, 6. Groove, 61. Cavity, 7. Fixing component, 8. Annular groove, 9. Sealing ring, 10. Wear-resistant layer, 11. Insulation layer, 12. Pressure-resistant layer. Detailed implementation method:

[0022] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0023] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0024] It should be noted that in the description of this utility model, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] like Figure 1 The connection structure of a composite material oil pipe shown includes: a connection part I2 disposed at one end of the composite material oil pipe 1, and a connection part II3 disposed at the other end of the composite material oil pipe 1. Connection holes 4 are provided around the end faces of the connection part I2 and the connection part II3. The end face of the connection part I2 is provided with a plurality of L-shaped protrusions 5. The surface of the connection part II3 is provided with a plurality of grooves 6 for the protrusions 5 to extend into. Each protrusion 5 and groove 6 is located between two adjacent connection holes 4. A cavity 61 with the same shape as the extended end of the top of the protrusion 5 is provided on one side wall of the groove 6.

[0028] In this process, the protrusion 5 extends into the groove 6, and after the oil pipe 1 is rotated so that the extended end of the protrusion 5 extends into the cavity 61 and locks, the connecting holes 4 of the connecting part I2 and the connecting part II3 are aligned in space.

[0029] Working principle:

[0030] When connecting oil pipes 1, first align the protrusion 5 of connecting part I2 with the groove 6 of connecting part II3, and initially insert the protrusion 5 into the groove 6. After the initial alignment, the pipe body needs to be rotated. Since the protrusion 5 is L-shaped, when the pipe body is rotated at a certain angle, the extension at the top of the protrusion 5 will extend into the cavity 61 inside the groove 6. The shape of this cavity 61 is completely consistent with the extension of the protrusion 5, so mechanical locking is achieved when the protrusion 5 extends into the cavity 61. When the protrusion 5 is fully inserted into the cavity 61 and locked, the connecting holes 4 of connecting part I2 and connecting part II3 will also automatically align. At this time, fasteners can be passed through the connecting holes 4 to firmly connect the oil pipes 1 together through connecting part I2 and connecting part II3.

[0031] In the above scheme, the pipes are connected into a single structure by fasteners 7 passing through the connection holes 4. Using this technical solution, bolts are employed for fixing, connecting the oil pipes 1 into a single structure. This allows the oil pipes 1 to withstand greater radial forces during oil transport, ensuring the stability and safety of the connection points.

[0032] In the above solution, at least one annular groove 8 is provided on the contact surface between the connecting part I2 and the connecting part II3 of the other pipe; wherein a sealing ring 9 of matching size is provided in the annular groove 8. With this technical solution, at least two annular grooves 6 are provided on the contact surface between the connecting part I2 and the connecting part II3 of the other pipe. The size of the inner annular groove 6 is smaller than that of the outer annular groove 6. This ensures that when the sealing ring 9 in the inner groove 6 fails, the larger sealing ring 9 in the outer groove 6 can continue to guarantee the sealing between the oil pipes 1. Furthermore, the sealing ring 9 is configured with a cross-shaped cross-section, so that both ends of the sealing ring 9 extend into the annular groove 8 on the end faces of the connecting part I2 and the connecting part II3, respectively. Additionally, after the sealing ring 9 contacts and is compressed on the end faces of the connecting part I2 and the connecting part II3, the sealing effect between the pipes is better.

[0033] In the above scheme, a wear-resistant layer 10 is provided on the outer wall of the composite material oil pipe. The main function of the wear-resistant layer 10 in this technical solution is to increase the durability of the pipe body, prevent damage due to friction during use, and improve the pipe's durability and service life.

[0034] In the above solution, an insulation layer 11 is provided inside the wear-resistant layer 10, and the insulation layer 11 is configured as an aerogel felt. Using this technical solution, the insulation layer 11 can reduce the loss of heat from the inside of the pipeline to the external environment. When transporting high-temperature or low-temperature media, the insulation layer 11 can effectively maintain the stability of the internal temperature of the pipeline and reduce energy loss. At the same time, the aerogel felt insulation material has an extremely low thermal conductivity, which can effectively prevent heat transfer, thereby maintaining the stability of the internal temperature of the pipeline.

[0035] In the above scheme, a pressure-resistant layer 12 is provided on the inner side of the insulation layer 11. The pressure-resistant layer 12 is formed by sequentially spirally winding PET polyester filaments. Using this technical solution, the pressure-resistant layer 12 allows the pipeline to better maintain its shape and structural integrity when subjected to external pressure or impact. This helps prevent deformation or rupture of the pipeline due to uneven stress, thereby improving the overall stability and safety of the pipeline system. PET polyester filaments have high strength and good toughness, enabling them to withstand significant pressure without easily deforming or breaking. The spiral winding method creates a continuous and tight protective layer around the pipeline, effectively improving the pipeline's pressure resistance.

[0036] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A connection structure for a composite material oil pipe, comprising: A connecting part I is provided at one end of the composite material oil pipe, and a connecting part II is provided at the other end of the composite material oil pipe. Both the end faces of the connecting part I and the connecting part II are provided with connecting holes. The connecting part I is characterized in that the end face of the connecting part I is provided with a plurality of L-shaped protrusions, and the surface of the connecting part II is provided with a plurality of grooves into which the protrusions extend. Each protrusion and groove is located between two adjacent connecting holes, and a cavity with the same shape as the extended end of the top of the protrusion is provided on one side wall of the groove. Wherein, the protrusion extends into the groove, and after the oil pipe is rotated so that the extended end of the protrusion extends into the cavity and locks, the connecting holes of the connecting part I and the connecting part II are aligned in space.

2. The connection structure of the composite tubing as recited in claim 1, wherein The tubes are connected into a single structure by fasteners passing through the connection holes.

3. The connection structure of the composite tubing as recited in claim 1, wherein At least one annular groove is provided on the contact surface between the connecting part I and the connecting part II of the other tube. The annular groove is provided with a sealing ring of a matching size.

4. The connection structure of the composite tubing according to claim 1, wherein The outer wall of the composite material oil pipe is provided with a wear-resistant layer.

5. The connection structure of the composite tubing according to claim 4, wherein An insulation layer is provided on the inner side of the wear-resistant layer, and the insulation layer is configured as an aerogel felt.

6. The connection structure of the composite tubing according to claim 5, wherein The inner side of the insulation layer is provided with a pressure-resistant layer, which is made of PET polyester filaments wound in a spiral in sequence.

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