Oil pipe scale and wax prevention device and oil pipe nipple type modular structure

Abstract

The utility model discloses an oil pipe anti-scale and anti-wax device and an oil pipe nipple type modular structure, the oil pipe anti-scale and anti-wax device and the oil pipe nipple type modular structure comprise an outer cylinder, a memory alloy part and an elastic part, the outer cylinder is tubular, the end part of the outer cylinder can be in threaded connection with an oil pipe, and the memory alloy part is connected with the elastic part. A mounting groove is formed in the inner wall of the outer cylinder, the memory alloy part is fixedly mounted in the mounting groove, the elastic part is mounted on the memory alloy part, the elastic part is in mechanical coupling connection with the memory alloy part, and the natural vibration frequency of the elastic part is equal to that of the memory alloy part. The oil pipe scale and wax prevention device and the oil pipe nipple type modular structure can be well suitable for scale and wax prevention under the well condition that wax precipitation and scaling are serious.

Description

Technical Field

[0001] The utility model relates to the technical field of oil extraction, in particular to an oil pipe anti-scaling and anti-wax device and an oil pipe short-section modular structure. Background Art

[0002] With the continuous advancement of oil exploration and development, reservoir conditions are becoming increasingly complex and diverse, and the properties of formation water also vary greatly. Formation water typically contains a variety of minerals, such as calcium, magnesium, barium, and strontium ions. These ions tend to form insoluble salts under specific physical and chemical conditions. During the oil production process, when crude oil and formation water are produced together and experience temperature and pressure changes, as well as the mixing of different fluids, wax and scaling are prone to occur. Waxing and scaling not only reduce the inner diameter of the oil pipe, restricting the flow of crude oil and reducing oil well production, but also seriously threaten the service life of the oil pipe due to under-scale corrosion, increase maintenance costs and operational risks, and affect the continuity and economic benefits of oil production operations.

[0003] Most existing physical anti-scaling and anti-wax equipment uses strong magnets, catalytic alloys and other anti-scaling and anti-wax tools, which use the characteristics of specific alloys and strong magnetic materials to change the properties of the fluid and inhibit the precipitation of scale and paraffin in the fluid. However, specific alloys and strong magnetic materials are only effective in preventing scale and wax under specific conditions, such as certain pressures and flow rates, but are difficult to adapt to changing well conditions. To solve this problem, the inventor applied for patent number CN212614639U, which discloses an oil pipe anti-scaling and anti-wax device. By wrapping a kit made of memory alloy material around the oil pipe, when the ambient temperature changes, the kit's lattice shifts, generating piezoelectric inductance, forming energy accumulation and sending vibration waves through the oil pipe to the fluid material inside the oil pipe, thereby solving the problem that traditional physical anti-scaling and anti-wax tools are difficult to adapt to changing well conditions.

[0004] However, during use, the oil pipe anti-scaling and anti-wax device of the above structure can achieve good anti-scaling and anti-wax effects in some well conditions with relatively mild wax and scaling, but it cannot be well adapted to general well conditions. For well conditions with relatively severe wax and scaling, the anti-scaling and anti-wax effects are not ideal. Utility Model Content

[0005] The utility model aims to provide an oil pipe anti-scaling and anti-wax device and an oil pipe short-joint modular structure, which can be well applied to the anti-scaling and anti-wax in well conditions with serious wax and scaling.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an oil pipe anti-scale and anti-wax device, including an outer cylinder, a memory alloy part and an elastic part. The outer cylinder is tubular, and the end of the outer cylinder can be threadedly connected to the oil pipe. An installation groove is opened on the inner wall of the outer cylinder, and the memory alloy part is fixedly installed in the installation groove. The elastic part is installed on the memory alloy part. The elastic part is mechanically coupled to the memory alloy part, and the natural vibration frequency of the elastic part is equal to that of the memory alloy part.

[0007] In a preferred embodiment, the memory alloy piece is in the shape of a circular tube.

[0008] In a preferred embodiment, the memory alloy component includes a plurality of arc-shaped plates, and the plurality of arc-shaped plates are assembled into the memory alloy component along the circumferential direction of the memory alloy component.

[0009] In a preferred embodiment, a fixing groove is provided on the inner wall of the memory alloy component, and the elastic component is installed in the fixing groove.

[0010] In a preferred embodiment, the elastic member is a wound elastic gasket.

[0011] In a preferred embodiment, the elastic member is a cylindrical coil spring.

[0012] In a preferred embodiment, the memory alloy component is made of silicon-aluminum memory alloy.

[0013] In order to achieve the above purpose, the utility model provides an oil pipe short section modular structure, including an oil pipe short section and an oil pipe anti-scaling and anti-wax device installed on the oil pipe short section, and the oil pipe anti-scaling and anti-wax device is the above-mentioned oil pipe anti-scaling and anti-wax device.

[0014] In a preferred embodiment, the oil pipe short section modular structure further includes a swirl tube, which is detachably mounted on the end of the outer cylinder of the oil pipe anti-scaling and anti-wax device, and a spiral groove is provided on the inner wall of the swirl tube.

[0015] In a preferred embodiment, an annular groove is further provided on the inner wall of the vortex tube, and the annular groove is cross-arranged with the spiral groove.

[0016] The difference between the present invention and the prior art lies in that the oil pipe anti-scale and anti-wax device and the oil pipe short section modular structure provided by the present invention are configured by providing an outer cylinder that can be connected to the oil pipe, and installing a memory alloy part and an elastic part on the inner wall of the outer cylinder, and the elastic part and the memory alloy part are mechanically coupled and connected, so that when the temperature of the fluid material flowing through the oil pipe changes, the lattice of the memory alloy part is displaced, generating piezoelectric inductivity, forming energy accumulation and generating vibration, and at the same time, since the elastic part and the memory alloy part are coupled with each other, when the memory alloy part vibrates, it is transmitted to the elastic part through the above-mentioned mechanical coupling method, and due to the elastic characteristics of the elastic part, it will undergo elastic deformation after receiving the vibration wave to store a part of the vibration energy, and then release the stored energy in the form of vibration. The vibration of the elastic part can be superimposed on the vibration wave generated by the memory alloy part, thereby amplifying the overall vibration wave. The amplified vibration wave passes through the fluid substance and can interfere with the crystallization process of scale and wax in the fluid. When the vibration wave acts on the fluid, the motion state of the solute molecules (such as scaling substances and wax components) in the fluid will change, making the motion of calcium ions, magnesium ions, barium ions, strontium ions, carbonate ions, bowlanate ions, etc. in the fluid become chaotic and difficult to arrange according to normal crystallization rules, thereby effectively preventing the occurrence of scaling and waxing. At the same time, when the amplified vibration wave acts on the fluid-solid interface, it will interfere with the adsorption process, which can reduce the adsorption of substances on the inner surface of the oil pipe, and the energy of the vibration wave can destroy the adsorption balance of scaling and waxing substances, so that the already adsorbed substances return to the fluid. Therefore, the oil pipe anti-scaling and anti-waxing device and the oil pipe short section modular structure provided by the utility model can be better applied to anti-scaling and anti-waxing in well conditions with more serious waxing and scaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front cross-sectional view of an oil pipe anti-scaling and anti-wax device according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A magnified view of the middle figure;

[0019] Figure 3 This is a front cross-sectional view of an oil pipe short section modular structure according to an embodiment of the present invention;

[0020] Figure 4 This is a front cross-sectional view of the swirl tube in the tubing short-section modular structure;

[0021] Description of reference numerals:

[0022] 1-outer cylinder; 2-memory alloy part; 3-elastic part; 4-installation groove; 5-fixing groove; 6-swirl tube; 7-spiral groove; 8-annular groove. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of this application more clearly understood, this application is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of this application. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion in the concepts of this application.

[0024] The accompanying drawings illustrate schematic diagrams of structures according to embodiments of the present application. These figures are not drawn to scale, and for the purpose of clarity, certain details are exaggerated and certain details may be omitted. The various regions, shapes, and relative sizes and positional relationships shown in the figures are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / structures of different shapes, sizes, and relative positions as needed.

[0025] Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] The oil pipe anti-scaling and anti-wax device and the oil pipe short-section modular structure provided by the present application are described in detail below with reference to specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0028] refer to Figure 1 As shown, the oil pipe anti-scaling and anti-wax device provided by the present invention includes an outer cylinder 1, a memory alloy part 2 and an elastic part 3. The outer cylinder 1 is tubular, and the end of the outer cylinder 1 can be connected to the oil pipe thread. Figure 1 As shown, the end of the outer cylinder 1 is provided with an external thread. When the outer cylinder 1 is threadedly connected to the oil pipe, the external thread at the end of the outer cylinder 1 can be slowly aligned with the internal thread on the oil pipe, and then the outer cylinder 1 can be slowly rotated to gradually engage the threads, thereby threading the outer cylinder 1 to the oil pipe. The outer cylinder 1 is preferably made of 35CrMo alloy structural steel.

[0029] like Figure 2As shown, a mounting groove 4 is formed on the inner wall of the outer cylinder 1, the memory alloy member 2 is fixedly mounted in the mounting groove 4, and the elastic member 3 is mounted on the memory alloy member 2. The elastic member 3 is mechanically coupled to the memory alloy member 2, and the natural vibration frequencies of the elastic member 3 and the memory alloy member 2 are equal. The mechanical coupling connection means that the elastic member 3 and the memory alloy member 2 are tightly fitted or tightly connected to achieve the transmission of vibration waves. The natural vibration frequencies of the elastic member 3 and the memory alloy member 2 being equal means that the natural vibration frequencies of the two are the same or substantially the same, so that they can resonate with each other.

[0030] The memory alloy part 2 is preferably in the shape of a circular tube. The mounting groove 4 can adopt various structures that are convenient for installing the memory alloy part 2. For example, the mounting groove 4 can adopt a dovetail groove, which has a wider head and a gradually narrowing tail, and can provide good axial and radial positioning capabilities. The dovetail groove can be distributed axially along the inner wall of the outer cylinder, or it can be distributed circumferentially, or a combination of the two. A dovetail-shaped protrusion can be provided on the corresponding part of the memory alloy part 2. Since the memory alloy part 2 will change its shape under conditions such as temperature changes, the shape of the dovetail groove can limit its deformation in all directions, so that it can fit tightly in the mounting groove, and can also ensure that it will not easily fall off when a vibration wave is generated.

[0031] like Figure 2 As shown, in this embodiment, the mounting groove 4 is preferably an annular groove, and the cross-sectional shape of the annular groove can be rectangular or other suitable shapes. The memory alloy member 2 is fixedly installed in the mounting groove 4. The memory alloy member 2 can adopt a split structure or an integrated structure. When the memory alloy member 2 adopts an integrated structure, in order to facilitate the installation of the memory alloy member 2, the outer tube 1 can adopt a split structure. After the memory alloy member 2 is installed in the mounting groove 4, the two sections of the outer tube 1 are assembled together and connected by welding.

[0032] The memory alloy part 2 preferably adopts a split structure, and the memory alloy part 2 includes a plurality of arc-shaped plates, and the plurality of arc-shaped plates are assembled into a tubular memory alloy part 2 along the circumferential direction of the memory alloy part 2. When installing the arc-shaped plates, the arc-shaped plates can be installed into the annular groove one by one. Specifically, one end of an arc-shaped plate can be aligned with the opening of the annular groove, and then the arc-shaped plate can be slowly pushed radially outward into the annular groove. During the pushing process, the arc-shaped plate can be kept in contact with the annular groove. Tools such as a rubber hammer can be used to gently tap the arc-shaped plate so that it is completely embedded in the annular groove. Then, other arc-shaped plates are installed in sequence in the same way. When installing adjacent arc-shaped plates, some rubber pads can be set at the joints of adjacent arc-shaped plates to improve the overall stability of the memory alloy part 2.

[0033] In order to facilitate the installation of the elastic member 3, refer to Figure 2 As shown, a fixing groove 5 is provided on the inner wall of the memory alloy part 2, and the elastic part 3 is installed in the fixing groove 5. The fixing groove 5 is preferably an annular groove, and the elastic part 3 is preferably a wound elastic gasket. The wound elastic gasket is composed of a metal belt and a non-metallic belt. The metal belt can be made of stainless steel 316, and the non-metallic belt can be made of polytetrafluoroethylene. When the wound elastic gasket is installed, the wound elastic gasket fits tightly with the memory alloy part 2 through a pre-tightening force. Since the wound elastic gasket is installed in the fixing groove 5, the contact between the two is closer and more stable, and the vibration can be transmitted more effectively. The elastic part 3 can also be a cylindrical coil spring. When the cylindrical coil spring is installed in the fixing groove 5, it can be tightly connected with the memory alloy part 2 through a pre-tightening force. In the present utility model, the memory alloy part 2 is preferably made of silicon-aluminum memory alloy.

[0034] The oil pipe anti-scaling and anti-wax device provided in this embodiment is provided with an outer cylinder 1 connected thereto, and a memory alloy part 2 and an elastic part 3 are installed on the inner wall of the outer cylinder 1. The elastic part 3 and the memory alloy part 2 are mechanically coupled and connected. Therefore, when the temperature of the fluid material flowing through the oil pipe changes, the memory alloy part 2 vibrates and is transmitted to the elastic part 3 through mechanical coupling, driving the elastic part 3 to vibrate. Since the elastic part 3 and the memory alloy part 2 have the same natural vibration frequency, the vibration of the elastic part 3 is superimposed on the vibration wave generated by the memory alloy part 2, thereby amplifying the overall vibration wave. The amplified vibration wave can more effectively prevent the occurrence of scaling and waxing. At the same time, the amplified vibration wave can reduce the adsorption of substances on the inner surface of the oil pipe, and the energy of the vibration wave can destroy the adsorption balance of scaling and waxing substances, causing the adsorbed substances to return to the fluid. Therefore, the oil pipe anti-scaling and anti-wax device provided by the utility model can be well applied to the anti-scaling and anti-wax well conditions with more serious wax and scaling.

[0035] Of course, the oil pipe anti-scaling and anti-wax device provided by the present invention can also be applied to well conditions with relatively light wax and scaling, or other general well conditions.

[0036] Based on the oil pipe anti-scale and anti-wax device provided in the above embodiment, the utility model also provides an oil pipe short section modular structure, including an oil pipe short section and an oil pipe anti-scale and anti-wax device installed on the oil pipe short section, and the oil pipe anti-scale and anti-wax device is the oil pipe anti-scale and anti-wax device recorded in the above embodiment.

[0037] In order to obtain better anti-fouling and anti-wax effects, such as Figure 3 、 Figure 4As shown, the oil pipe short-section modular structure also includes a swirl tube 6, which is removably mounted at the end of the outer cylinder 1 of the oil pipe anti-scaling and anti-wax device. The inner wall of the swirl tube 6 is provided with a spiral groove 7. The swirl tube 6 can be mounted at the end of the outer cylinder 1 of the oil pipe anti-scaling and anti-wax device by means of a threaded connection or other means. The spiral groove 7 is arranged axially around the swirl tube 6, and the number of spiral grooves 7 can be one or more. The swirl tube 6 is preferably made of 35CrMo alloy structural steel. When fluid materials such as crude oil and formation water flow upward through the swirl tube 6, the fluid flow is driven by the spiral groove 7 to produce a rotational motion. The centrifugal force generated by the rotation of the fluid material can disrupt the aggregation of wax crystals and scale, preventing them from further growth and deposition. When the fluid material flows through the swirl tube 6 and enters the oil pipe anti-scaling and anti-wax device, the vibration waves emitted by the elastic member 3 and the memory alloy member 2 can achieve a better anti-scaling and anti-wax effect.

[0038] On the basis of the above embodiment, it is further preferred that Figure 4 As shown, an annular groove 8 is further provided on the inner wall of the swirl tube 6. The annular groove 8 is coaxial with the swirl tube 6 and intersects with the spiral groove 7. In this embodiment, the annular groove 8 constrains the flow direction and velocity of the fluid material as it passes through the intersecting annular groove 8 and spiral groove 7, making the flow of the fluid material more regular.

[0039] The order of the above embodiments is only for the convenience of description and does not represent the advantages or disadvantages of the implementation methods.

[0040] Finally, it should be noted that: although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this application.

Claims

1. An oil pipe anti-scaling and anti-wax device, characterized in that , comprising an outer cylinder (1), a memory alloy part (2) and an elastic part (3), wherein the outer cylinder (1) is tubular, and the end of the outer cylinder (1) can be threadedly connected to an oil pipe, and an installation groove (4) is provided on the inner wall of the outer cylinder (1), the memory alloy part (2) is fixedly installed in the installation groove (4), and the elastic part (3) is installed on the memory alloy part (2), and the elastic part (3) is mechanically coupled to the memory alloy part (2), and the natural vibration frequency of the elastic part (3) is equal to that of the memory alloy part (2).

2. The oil pipe anti-scaling and anti-wax device according to claim 1, characterized in that: The memory alloy piece (2) is in the shape of a circular tube.

3. The oil pipe anti-scaling and anti-wax device according to claim 2, characterized in that: The memory alloy piece (2) comprises a plurality of arc-shaped plates, and the plurality of arc-shaped plates are assembled into the memory alloy piece (2) along the circumferential direction of the memory alloy piece (2).

4. The oil pipe anti-scaling and anti-wax device according to claim 2 or 3, characterized in that: A fixing groove (5) is provided on the inner wall of the memory alloy component (2), and the elastic component (3) is installed in the fixing groove (5).

5. The oil pipe anti-scaling and anti-wax device according to claim 4, characterized in that: The elastic member (3) is a wound elastic gasket.

6. The oil pipe anti-scaling and anti-wax device according to claim 4, characterized in that: The elastic member (3) is a cylindrical helical spring.

7. The oil pipe anti-scaling and anti-wax device according to claim 1, characterized in that: The memory alloy piece (2) is made of silicon-aluminum memory alloy.

8. A tubing short joint modular structure, characterized in that: It comprises an oil pipe short section and an oil pipe anti-scaling and anti-wax device installed on the oil pipe short section, wherein the oil pipe anti-scaling and anti-wax device is the oil pipe anti-scaling and anti-wax device according to any one of claims 1-7.

9. The tubing short joint modular structure according to claim 8, characterized in that: It also includes a swirl tube (6) which is detachably mounted on the end of the outer cylinder (1) of the oil pipe anti-scaling and anti-wax device, and a spiral groove (7) is provided on the inner wall of the swirl tube (6).

10. The tubing short joint modular structure according to claim 9, characterized in that: An annular groove is also provided on the inner wall of the swirl tube (6), the annular groove (8) and the spiral groove are arranged crosswise, and the annular groove (8) and the spiral groove (7) are arranged crosswise.

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