Ultra-efficient solid scale inhibitor under pump

Abstract

The utility model discloses a super-efficient solid scale inhibitor under a pump, which comprises an outer cylinder body, one end of the outer cylinder body is connected with an outer scale inhibition component, and a centralizer is inserted and sleeved on the outer side of the outer scale inhibition component; the inner side of the end of the outer scale inhibition assembly is sleeved with an inner anode cylinder, the end of the inner anode cylinder is connected with an end socket cover pipe used for limiting the inner anode cylinder, a mounting mechanism is arranged in the outer cylinder and the outer scale inhibition assembly, and a plurality of inner scale inhibition assemblies are arranged on the mounting mechanism in a penetrating mode. The arrangement mode that the outer scale inhibition assembly and the inner scale inhibition assembly are matched is utilized, the scale inhibition rods in the pipes pass through the springs, a fixed distance is reserved between every two adjacent scale inhibition rods in the pipes, the contact area of oil and chemicals is greatly increased while oil circulation is facilitated, and meanwhile due to the fact that the space is increased, dissolution of the chemicals cannot block a channel; the inner anode cylinder is installed in the center pipe, oil pipe corrosion is replaced with a sacrificial anode mode, and therefore the service life of the oil pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of scale inhibitors, in particular to an under-pump ultra-high-efficiency solid scale inhibitor. Background Art

[0002] In the process of crude oil extraction and production, due to the deepening of oil field development and the increasing frequency of water injection, some substances in the water are prone to chemical reactions at the bottom of the well, producing scale-like substances. As the scale increases, serious phenomena such as pump blockage and leakage, sucker rod breakage and detachment, oil casing rupture and failure of downhole instruments and equipment will occur, which will have a serious impact on the normal operation of the oil well.

[0003] To solve the problem of downhole scaling, the commonly used technology in the industry is as follows: by solidifying the descaling agent to form a cylindrical agent rod, the agent rod is loaded into an oil pipe with eyelets, and the oil pipe with the agent is lowered to the bottom of the well as the downhole pipe string is lowered. When oil production is carried out, the oil first enters through this oil pipe. As the downhole oil soaks and flushes the scale inhibitor rod, it slowly dissolves and continuously releases high-efficiency scale inhibitors to prevent the formation of downhole scale through adsorption, integration, dispersion and other effects. However, based on the current use, there are the following three technical defects:

[0004] (1) Since the scale inhibitor rods are all installed in the eyelet oil pipe, they almost occupy the entire inner hole space of the oil pipe, blocking the oil from passing through and reducing the contact between the oil and the reagent rods. At the same time, as the scale inhibitor rods dissolve, the reagents form a viscous substance with poor fluidity, which easily blocks the already small liquid gap, making it difficult for the oil to pass through, affecting the efficiency of the oil pump;

[0005] (2) Due to different working conditions of oil wells, some oil wells need to prevent scale outside the oil pipe, which means that the agent must be released outside the oil pipe. Since the scale inhibitor sticks are placed in the eyelet oil pipe, they can only be released outward through the eyelet. Since the eyelet is small, the release to the outside is bound to be slow, and the scale inhibition effect outside the pipe is not good;

[0006] (3) Since the oil casing is made of iron and the downhole environment is complex, the free electrons in the oil can easily produce electrochemical reactions with the eyelet oil pipe, accelerating its corrosion, greatly shortening its service life. Utility Model Content

[0007] The utility model aims to provide an under-pump ultra-high-efficiency solid scale inhibitor to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a super-efficient solid scale inhibitor under the pump, comprising:

[0009] An outer cylinder, one end of which is connected to an external anti-scaling component, and a centralizer is inserted and sleeved on the outer side of the external anti-scaling component;

[0010] An inner anode cylinder is sleeved on the inner side of the end of the outer anti-scaling component, and a head cover tube for limiting the inner anode cylinder is connected to the end of the inner anode cylinder. A mounting mechanism is arranged inside the outer cylinder body and the outer anti-scaling component, and a plurality of inner anti-scaling components are inserted on the mounting mechanism.

[0011] Preferably, the external antiscaling component comprises:

[0012] A central tube, one end of which is threadedly sleeved with one end of the outer cylinder, the inner anode cylinder is sleeved on the inner side of the central tube, and the end cap tube is threadedly matched with the other end of the central tube;

[0013] The outer tube anti-scaling rod tubes are multiple outer tube anti-scaling rod tubes which are sleeved on the outside of the central tube, and the outer tube anti-scaling rod tubes are coaxially arranged with the central tube.

[0014] Preferably, the centralizer is arranged between adjacent external anti-scaling rod tubes, and the centralizer comprises:

[0015] A casing, wherein the casing is sleeved on the outside of the central pipe;

[0016] The protrusions are arranged in a ring array, and the sleeve and the protrusions are integrated.

[0017] Preferably, the mounting mechanism comprises:

[0018] A first gland, wherein the first gland is threadedly sleeved on the inner side of the other end of the outer cylinder;

[0019] A second gland, wherein the second gland is threadedly sleeved on the other end of the central tube;

[0020] A threaded rod is rotatably connected between the first gland and the second gland.

[0021] Preferably, the internal scale prevention component comprises:

[0022] An in-pipe anti-scaling rod, wherein the in-pipe anti-scaling rod is movably inserted into the outside of the threaded rod;

[0023] A connecting cover is respectively connected to the two ends of the scale-preventing rod in the pipe, and the connecting cover is threadedly interlaced with the threaded rod.

[0024] Preferably, the internal scale prevention component further comprises:

[0025] A spring is arranged between adjacent connection covers and sleeved on the outside of the threaded rod.

[0026] Preferably, the outer cylinder, the central tube and the anti-scaling rod tube outside the tube are all provided with eyelets.

[0027] Technical effects and advantages of the utility model:

[0028] The utility model utilizes a setting mode in which an external anti-scaling component and an internal anti-scaling component are matched. The anti-scaling rods in the pipe are connected by springs, so that a fixed distance is reserved between adjacent anti-scaling rods in the pipe, which is convenient for the circulation of oil and greatly increases the contact area between the oil and the reagent. At the same time, due to the increase in space, the dissolution of the reagent cannot cause blockage to the channel. The inner anode cylinder is installed in the central pipe. The inner anode cylinder is made of an aluminum-magnesium alloy of highly active metal elements. When the oil passes through the inner anode cylinder, the charged negative ions in the oil and the active metal atoms in the anode preferentially react chemically to form salt substances that are soluble in water or cover the surface of the anode, which replace the metal elements of the oil pipe to complete the electrochemical reaction, and replace the corrosion of the oil pipe in a sacrificial anode manner, thereby increasing the service life of the oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0030] Figure 2 It is a schematic diagram of the internal structure of the first gland of the utility model.

[0031] Figure 3 It is a schematic diagram of the internal structure of the internal scale-preventing component of the utility model.

[0032] Figure 4 It is a schematic diagram of the internal structure of the head cover of the utility model.

[0033] Figure 5 It is a schematic diagram of the internal structure of the pipe of the utility model's external scale-inhibiting rod.

[0034] Figure 6 This is a schematic diagram of the internal structure of the centralizer of the utility model at the front.

[0035] Figure 7 It is a schematic diagram of the internal structure of the centralizer of the utility model from the side.

[0036] In the figure: 1. outer cylinder; 2. outer anti-scaling assembly; 21. center tube; 22. anti-scaling rod tube outside the tube; 3. centralizer; 31. casing; 32. protrusion; 4. inner anode cylinder; 5. head cover tube; 6. installation mechanism; 61. first pressure cover; 62. second pressure cover; 63. threaded rod; 7. inner anti-scaling assembly; 71. anti-scaling rod inside the tube; 72. connecting cover; 73. spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] The utility model provides Figure 1-7 The shown pump under-water ultra-high efficiency solid scale inhibitor comprises: an outer cylinder 1, one end of the outer cylinder 1 is connected to an outer scale inhibitor component 2, and a centralizer 3 is inserted and sleeved on the outer side of the outer scale inhibitor component 2; an inner anode cylinder 4 is sleeved on the inner side of the end of the outer scale inhibitor component 2, and the inner anode cylinder 4 is made of an aluminum-magnesium alloy of highly active metal elements. When the oil passes through the inner anode cylinder 4, the charged negative ions in the oil and the active metal atoms in the anode preferentially react chemically to form salt substances that are soluble in water or cover the surface of the anode, which replace the metal elements of the oil pipe to complete the electrochemical reaction, and replace the oil pipe corrosion in a sacrificial anode manner, thereby increasing the service life of the oil pipe. The end of the inner anode cylinder 4 is connected to a head cover pipe 5 for limiting the inner anode cylinder 4, and the head cover pipe 5 is convenient for installation on site with other oil pipes. An installation mechanism 6 is arranged inside the outer cylinder 1 and the outer scale inhibitor component 2, and a plurality of inner scale inhibitor components 7 are inserted and arranged on the installation mechanism 6.

[0039] Specifically, the external anti-scaling component 2 includes: a central tube 21, one end of the central tube 21 is threadedly sleeved with one end of the outer cylinder 1, the inner anode tube 4 is sleeved on the inner side of the central tube 21, and the head cover tube 5 is threadedly matched with the other end of the central tube 21; an external anti-scaling rod tube 22, a plurality of external anti-scaling rod tubes 22 are sleeved on the outside of the central tube 21, and the external anti-scaling rod tubes 22 and the central tube 21 are coaxially arranged, and eyelets are provided on the outer cylinder 1, the central tube 21 and the external anti-scaling rod tubes 22, through which the oil can enter the inner part of the outer cylinder 1 and the central tube 21, and the anti-scaling agent is directly released to the outside of the tube through the external anti-scaling rod tubes 22, thereby solving the problem that the agent inside the tube is not easy to be released to the outside of the tube.

[0040] Specifically, the centralizer 3 is arranged between adjacent external anti-scaling rod tubes 22, and the centralizer 3 includes: a casing 31, which is sleeved on the outside of the central tube 21; a protrusion 32, wherein a plurality of protrusions 32 are arranged in a ring array, and the casing 31 and the protrusion 32 are integrated. By sleeved the external anti-scaling rod tube 22 on the outside of the central tube 21, in order to prevent the external anti-scaling rod tube 22 from eccentric wear and collision during the downhole process, a centralizer 3 is added between adjacent external anti-scaling rod tubes 22. The centralizer 3 mainly centralizes the device at the center of the downhole pipeline, and through the intermittent protrusion of the protrusion 32, the protrusion 32 protrudes beyond the outer diameter of other components in the device, which is convenient for supporting and protecting the solid anti-scaling device, thereby protecting other parts from damage during the downhole process.

[0041] Specifically, the installation mechanism 6 includes: a first pressure cap 61, which is threadedly sleeved on the inner side of the other end of the outer cylinder body 1; a second pressure cap 62, which is threadedly sleeved on the other end of the center tube 21; and a threaded rod 63, which is rotatably connected between the first pressure cap 61 and the second pressure cap 62. The first pressure cap 61 is used to limit the rotation of the threaded rod 63, and the second pressure cap 62 is used to limit the threaded rod 63 and to tighten the inner anode cylinder 4, so that the installation position of the inner anode cylinder 4 is more stable. The relative position between the connecting cover 72 and the threaded rod 63 can be adjusted by interlacing the threads between the threaded rod 63 and the connecting cover 72, which is also convenient for adjusting the relative position between the scale inhibitors 71 in multiple tubes.

[0042] Among them, the internal scale-preventing assembly 7 includes: an internal scale-preventing rod 71, which is movably inserted into the outside of the threaded rod 63; a connecting cover 72, which is respectively connected to the two ends of the internal scale-preventing rod 71, and the connecting cover 72 is threadedly inserted and connected with the threaded rod 63. The internal scale-preventing assembly 7 also includes: a spring 73, which is arranged between adjacent connecting covers 72, and the spring 73 is sleeved on the outside of the threaded rod 63. Through the elastic support of the spring 73, a certain oil-passing space is formed between each group of internal scale-preventing rods 71. The internal scale-preventing rods 71 ​​in the tube are provided with a fixed distance between adjacent internal scale-preventing rods 71 ​​through the spring 73, which is convenient for the circulation of oil and greatly increases the contact area between the oil and the reagent of the internal scale-preventing rod 71 in the tube. At the same time, due to the increase in space, the dissolution of the reagent cannot cause blockage to the channel. Through holes are provided on the first pressure cover 61, the second pressure cover 62 and the connecting cover 72 to facilitate the flow of oil.

[0043] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A super-efficient solid scale inhibitor under a pump, comprising: An outer cylinder (1), one end of the outer cylinder (1) being connected to an external anti-scaling component (2), and a centralizer (3) being inserted through the outer side of the external anti-scaling component (2); The invention is characterized in that an inner anode cylinder (4) is sleeved on the inner side of the end of the outer anti-scaling component (2), the end of the inner anode cylinder (4) is connected to a head cover tube (5) for limiting the inner anode cylinder (4), and a mounting mechanism (6) is arranged inside the outer cylinder body (1) and the outer anti-scaling component (2), and a plurality of inner anti-scaling components (7) are inserted and arranged on the mounting mechanism (6).

2. The ultra-high efficiency solid scale inhibitor under the pump according to claim 1, characterized in that: The external anti-scaling component (2) comprises: A central tube (21), one end of the central tube (21) is threadedly sleeved with one end of the outer cylinder (1), the inner anode cylinder (4) is sleeved on the inner side of the central tube (21), and the end cap tube (5) is threadedly matched with the other end of the central tube (21); The external scale-inhibiting rod tubes (22) are multiple external scale-inhibiting rod tubes (22) which are sleeved on the outside of the central tube (21), and the external scale-inhibiting rod tubes (22) and the central tube (21) are coaxially arranged.

3. The ultra-high efficiency solid scale inhibitor under the pump according to claim 1, characterized in that: The centralizer (3) is arranged between adjacent external scale-inhibiting rod tubes (22), and the centralizer (3) comprises: A sleeve (31), wherein the sleeve (31) is sleeved on the outside of the central tube (21); A protrusion (32), wherein a plurality of the protrusions (32) are arranged in a ring array, and the sleeve (31) and the protrusions (32) are arranged in an integrated manner.

4. The ultra-high efficiency solid scale inhibitor under the pump according to claim 1, characterized in that: The mounting mechanism (6) comprises: A first gland (61), the first gland (61) being threadedly sleeved on the inner side of the other end of the outer cylinder (1); A second gland (62), wherein the second gland (62) is threadedly sleeved on the other end of the central tube (21); A threaded rod (63), wherein the threaded rod (63) is rotatably connected between the first pressure cover (61) and the second pressure cover (62).

5. The ultra-high efficiency solid scale inhibitor under the pump according to claim 1, characterized in that: The internal anti-scaling component (7) comprises: An in-pipe anti-scaling rod (71), wherein the in-pipe anti-scaling rod (71) is movably inserted into the outside of the threaded rod (63); A connecting cover (72) is respectively connected to two ends of the anti-scaling rod (71) in the pipe, and the connecting cover (72) is threadedly connected to the threaded rod (63).

6. The under-pump ultra-high efficiency solid scale inhibitor according to claim 5, characterized in that: The internal anti-scaling component (7) further comprises: A spring (73), wherein the spring (73) is arranged between adjacent connection covers (72), and the spring (73) is sleeved on the outside of the threaded rod (63).

7. The under-pump ultra-high efficiency solid scale inhibitor according to claim 2, characterized in that: The outer cylinder (1), the central tube (21) and the outer anti-scaling rod tube (22) are all provided with eyelets.

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