A clustered spiral sedimentation device

Abstract

The present application discloses a clustered spiral scaler, comprising an outer cylinder, a spiral tubular scale settling device, a first fixing frame, a second fixing frame, a left joint and a right joint; the spiral tubular scale settling device and the first fixing frame and the second fixing frame are all fixedly installed inside the outer cylinder; the spiral tubular scale settling device comprises a spiral tubular scale settling body and a support rod; the spiral tubular scale settling body is sleeved outside the support rod, with the left end abutting against the first fixing frame and the right end abutting against the second fixing frame; the left end of the support rod is fixedly connected to the first fixing frame, and the right end is fixedly connected to the second fixing frame; one end of the left joint is fixedly connected to the left end of the outer cylinder, and the other end is fixedly connected to the front end of the well oil pipeline or the inlet end of the downhole oil pump; the right joint is fixedly connected to the right end of the outer cylinder, and has a large specific surface area, a small pressure drop, a strong adsorption force and a good scale settling effect.

Description

Technical Field

[0001] The present application relates to the technical field of downhole oil collection and transportation pipeline scaling control, and in particular to a clustered spiral scaler. Background Art

[0002] There are many factors that lead to scaling of oilfield pipelines. In addition to a certain amount of organic matter, H2S, CO2, ions, bacteria and mud and sand, the medium also contains insoluble barium and strontium scale ions, as well as the following external factors: temperature, pressure, flow rate, pH value, etc. In the long-term production operation practice, the hazards of scaling of oilfield crude oil pipelines are mainly reflected in the following aspects:

[0003] (1) After the scale forms on the inner surface of the equipment pipe in contact with water, it often adheres to the inner surface of the pipe, which may cause varying degrees of blockage and pipeline corrosion, reduce flow, cause pipeline pressure to rise, increase friction, and pose a great safety hazard. Especially in winter, "gas plugs" will appear in the pipeline, posing a serious safety hazard;

[0004] (2) Scaling often reduces the effective transport channel cross-sectional area of ​​the pipeline, reduces the processing capacity of the equipment, and inevitably increases the transport capacity and processing costs, which not only reduces production, but also increases costs and affects the service life of the equipment.

[0005] Based on the above situation, in the existing technology, for the problem of scale prevention and treatment of oil pipelines, a scale settling device is usually installed on the ground or in a certain section of the oil pipeline to concentrate a large amount of dirt in the scale settling device to reduce problems and safety accidents in subsequent transmission pipelines.

[0006] The main problems with the currently commonly used scalers are: large resistance, increased pressure in the pipeline system, destructive effects on downstream equipment, poor adsorption capacity, and insignificant scaling effect. The improvement effect on subsequent scaling problems in the transmission pipeline is not obvious. Summary of the invention

[0007] The present application provides a clustered spiral scaler to solve the problems in the prior art of large scaler resistance, pipeline system pressure increase, destructive effect on downstream equipment, poor adsorption capacity, and unclear scale settling effect.

[0008] The technical solutions adopted in this application are as follows:

[0009] A clustered spiral scale settling device, characterized in that it comprises an outer cylinder 1, a spiral tubular scale settling device 2, a first fixing frame 31, a second fixing frame 32, a left joint 5 and a right joint 6;

[0010] The spiral tubular scale settling device 2 and the first fixing frame 31 and the second fixing frame 32 are all fixedly installed inside the outer cylinder 1;

[0011] The spiral tubular scale settling device 2 comprises a spiral tubular scale settling body 21 and a support rod 22;

[0012] The spiral tubular scale-receiving body 21 is sleeved outside the supporting rod 22, with the left end abutting against the first fixing frame 31 and the right end abutting against the second fixing frame 32;

[0013] The left end of the support rod 22 is fixedly connected to the first fixing frame 31, and the right end is fixedly connected to the second fixing frame 32;

[0014] One end of the left side joint 5 is fixedly connected to the left end of the outer cylinder 1, and the other end is fixedly connected to the lower end of the tubular string in the wellbore or the inlet end of the downhole oil pump;

[0015] The right side joint 6 is fixedly connected to the right end of the outer cylinder 1 .

[0016] Preferably, the spiral tubular dirt sedimentation body 21 is a long sheet body that is spirally wound to form a spiral tube with a hollow channel in the middle;

[0017] Each pitch of the long sheet is greater than its width;

[0018] The surface of the long sheet is in a rough, wrinkled or cracked shape.

[0019] Preferably, the left end of the support rod 22 is inserted into the head of the pin shaft 23 with a hole, and the pin shaft 23 with a hole is fixedly connected to the first fixing frame 31;

[0020] The right end of the support rod 22 is fixedly connected in the hook ring of the fisheye screw 24 , and the fisheye screw 24 is fixedly connected to the second fixing bracket 32 ​​.

[0021] Preferably, the first fixing frame 31 and the second fixing frame 32 are both disc-shaped;

[0022] The first fixing frame 31 is provided with a plurality of through holes for fixing the pin shaft with holes 23;

[0023] The second fixing frame 32 is provided with a plurality of through holes for fixing the fisheye screws 24 .

[0024] Preferably, a first sleeve 41 is installed between the first fixing frame 31 and the left joint 5;

[0025] A second sleeve 42 is installed between the second fixing frame 32 and the right joint 6;

[0026] The first sleeve 41 and the second sleeve 42 are both threadedly connected to the inner wall of the outer cylinder 1 .

[0027] Preferably, a plurality of the clustered spiral sedimentation devices are connected in series.

[0028] Preferably, the two clustered spiral sedimentators are connected in series, namely, comprising a first spiral sedimentator 7 and a second spiral sedimentator 8 connected in series;

[0029] The left side joint of the first spiral dirt collector 7 is threadedly connected to the inlet end of the oil well pump 9 or the lower end of the pipe string;

[0030] The right side joint of the first spiral sedimentation device 7 is threadedly connected to the left side joint of the second spiral sedimentation device 8 .

[0031] Preferably, a number of connecting holes are processed on the wall of the outer cylinder 1.

[0032] Preferably, the spiral tubular scale-depositing body 21 is made of a metal alloy material or a cation exchange resin material having adsorption properties for metal cations.

[0033] The beneficial effects of adopting the technical solution of this application are as follows:

[0034] 1. The clustered spiral tubular adsorption sedimentation device described in the present application is in a clustered spiral shape. When the oil flows through the sedimentation device, the spiral tubular sedimentation body will not be greatly deformed, so that the dirt in the oil will be settled and adsorbed on the spiral tubular sedimentation body, achieving the effect of sedimentation. The spiral tubular sedimentation body has a large specific surface area, large gaps, small system resistance, and no obvious pressurization in the pipeline, so the downstream equipment is safe and risk-free.

[0035] 2. The present application can cause the dirt to precipitate and accumulate on the device, which can greatly reduce the dirt in the downstream conveying pipeline of the descaling device. It has strong adsorption force and good descaling effect, and prevents problems and safety accidents in the downstream conveying pipeline. It effectively solves the problems in the prior art that the descaling device has high resistance, the limited conveying channel of the pipeline becomes smaller, the adsorption force is poor, and the descaling effect is not obvious.

[0036] 3. The clustered spiral tubular adsorption scaler described in the present application can be connected in series or in parallel, or used alone. Scale treatment can be performed at the lower end of the pipe string or the inlet end of the downhole oil pump. The scale treatment effect at the inlet end of the downhole oil pump is more obvious, which can directly reduce the harm of dirt to the oil pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0038] Figure 1This is a schematic diagram of the structure of a clustered spiral scaler for this application;

[0039] Figure 2 is a structural schematic diagram of the spiral tubular scale precipitation device;

[0040] Figure 3 It is a structural schematic diagram of two spiral scalers connected in series;

[0041] Illustration Description:

[0042] Among them, 1-outer cylinder, 2-spiral tubular scale settling device, 21-spiral tubular scale settling body, 22-support rod, 23-pin shaft with hole, 24-fisheye screw, 31-first fixing frame, 32-second fixing frame, 41-first sleeve, 42-second sleeve, 5-left joint, 6-right joint, 7-first spiral scaler, 8-second spiral scaler, 9-oil pump. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] See also Figure 1 , which is a schematic diagram of the structure of a clustered spiral sedimentation device in the present application.

[0050] The present application provides a clustered spiral scale settling device, comprising an outer cylinder 1, a spiral tubular scale settling device 2, a first fixing frame 31, a second fixing frame 32, a left joint 5 and a right joint 6;

[0051] The spiral tubular scale settling device 2 and the first fixing frame 31 and the second fixing frame 32 are all fixedly installed inside the outer cylinder 1;

[0052] like Figure 2 As shown, the spiral tubular scale settling device 2 comprises a spiral tubular scale settling body 21 and a support rod 22;

[0053] The spiral tubular scale-receiving body 21 is sleeved outside the supporting rod 22, with the left end abutting against the first fixing frame 31 and the right end abutting against the second fixing frame 32;

[0054] The left end of the support rod 22 is fixedly connected to the first fixing frame 31, and the right end is fixedly connected to the second fixing frame 32;

[0055] One end of the left side joint 5 is fixedly connected to the left end of the outer cylinder 1, and the other end is fixedly connected to the lower end of the tubular string in the wellbore or the inlet end of the downhole oil pump;

[0056] The right side joint 6 is fixedly connected to the right end of the outer cylinder 1 .

[0057] The present application changes the traditional process of "centralized dewaxing and descaling after crude oil is produced from the ground" to "descaling in the wellbore before crude oil is produced from the ground", thereby achieving the goal of prevention first and combining transmission and blocking.

[0058] The clustered spiral tubular adsorption dirt sink described in the present application can be connected in series or in parallel, or used alone, and can be used to treat dirt at the lower end of the pipe string in the wellbore or at the inlet end of the downhole oil pump. The effect of treating dirt at the inlet end of the downhole oil pump is more obvious, which can directly reduce the harm of dirt to the oil pipeline.

[0059] The spiral tubular scale-settling body 21 is a long sheet body that is spirally wound to form a spiral tube with a hollow channel in the middle. It has a larger specific area, small resistance, small pressure drop, and good dirt adsorption effect. The spiral tubular scale-settling body 21 is a metal alloy material that has adsorption properties for metal cations, or a cation exchange resin material can be selected according to the properties of the scale in the oil field block. The calcium and magnesium ions in the oil and water are exchanged with the active gene sodium ions on the cation exchange resin material and adsorbed.

[0060] Each pitch of the long sheet body is greater than its width, so that the center of the spiral tube can communicate with the outside, forming a smooth flow channel to facilitate the circulation of oil.

[0061] The surface of the long sheet is rough, wrinkled or cracked, and has a high roughness, which makes tiny dirt grow continuously like crystals, thereby improving the adsorption capacity of dirt.

[0062] The left end of the support rod 22 is inserted into the head of the pin shaft 23 with a hole, and the pin shaft 23 with a hole is fixedly connected to the first fixing frame 31;

[0063] The right end of the support rod 22 is fixedly connected in the hook ring of the fisheye screw 24 , and the fisheye screw 24 is fixedly connected to the second fixing bracket 32 ​​.

[0064] The first fixing frame 31 and the second fixing frame 32 are both disc-shaped;

[0065] The first fixing frame 31 is provided with a plurality of through holes for fixing the pin shaft with holes 23;

[0066] The second fixing frame 32 is provided with a plurality of through holes for fixing the fisheye screws 24 .

[0067] A first sleeve 41 is installed between the first fixing frame 31 and the left joint 5;

[0068] A second sleeve 42 is installed between the second fixing frame 32 and the right joint 6;

[0069] The first sleeve 41 and the second sleeve 42 are both threadedly connected to the inner wall of the outer cylinder 1 .

[0070] A plurality of the clustered spiral sedimentation devices are connected in series.

[0071] like Figure 3 As shown, the two clustered spiral sedimentators are connected in series, namely, they include a first spiral sedimentator 7 and a second spiral sedimentator 8 connected in series;

[0072] The left side joint of the first spiral dirt collector 7 is threadedly connected to the inlet end of the oil well pump 9 or the lower end of the pipe string;

[0073] The right side joint of the first spiral sedimentation device 7 is threadedly connected to the left side joint of the second spiral sedimentation device 8 .

[0074] A number of connecting holes are processed on the wall of the outer cylinder 1.

[0075] The clustered spiral tubular adsorption scaler described in the present application can be used for scaling control of transmission pipelines and can also be used for pre-treatment of scale before oil is pumped out at the inlet end of a downhole oil pump. When the oil flows through the scaler, the spiral tubular scale settling body will not be greatly deformed, so that the scale in the oil will be adsorbed on the spiral tubular scale settling body to achieve the scaling effect. The spiral tubular scale settling body has a large specific surface area, a large gap, a small system resistance, and an insignificant pressure increase in the pipeline, so that the downstream equipment is safe and risk-free. The present application can cause scale to precipitate and accumulate on the device, which can greatly reduce the scale in the transmission pipeline downstream of the scaler, has a strong adsorption force, a good scaling effect, and prevents problems and safety accidents in the downstream transmission pipeline, effectively solving the problems of large resistance of the scaler, a reduced limited transmission channel in the pipeline, poor adsorption force, and insignificant scaling effect in the prior art.

[0076] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A clustered spiral sedimentation device, characterized in that: It comprises an outer cylinder (1), a spiral tubular scale settling device (2), a first fixing frame (31), a second fixing frame (32), a left joint (5) and a right joint (6); The spiral tubular scale settling device (2), the first fixing frame (31), and the second fixing frame (32) are all fixedly installed inside the outer cylinder (1); The spiral tubular scale settling device (2) comprises a spiral tubular scale settling body (21) and a support rod (22); The spiral tubular scale-receiving body (21) is sleeved outside the supporting rod (22), with the left end abutting against the first fixing frame (31) and the right end abutting against the second fixing frame (32); The spiral tubular scale sedimentation body (21) is a long sheet body that is spirally wound to form a spiral tubular shape with a hollow channel in the middle; Each pitch of the long sheet is greater than its width; The surface of the long sheet is rough, wrinkled or cracked; The left end of the support rod (22) is fixedly connected to the first fixing frame (31), and the right end is fixedly connected to the second fixing frame (32); One end of the left side joint (5) is fixedly connected to the left end of the outer cylinder (1), and the other end is fixedly connected to the lower end of the tubular column in the wellbore or the inlet end of the downhole oil pump; The right side joint (6) is fixedly connected to the right end of the outer cylinder (1); A plurality of the clustered spiral sedimentation devices are connected in series; The two clustered spiral sedimentation devices are connected in series, namely, they include a first spiral sedimentation device (7) and a second spiral sedimentation device (8) connected in series; The left side joint of the first spiral dirt collector (7) is threadedly connected to the inlet end of the oil well pump (9) or the lower end of the pipe string; The right side joint of the first spiral sedimentation device (7) is threadedly connected to the left side joint of the second spiral sedimentation device (8).

2. A clustered spiral sedimentation device according to claim 1, characterized in that: The left end of the support rod (22) is inserted into the head of the pin shaft with a hole (23), and the pin shaft with a hole (23) is fixedly connected to the first fixing frame (31); The right end of the support rod (22) is fixedly connected to the hook ring of the fisheye screw (24), and the fisheye screw (24) is fixedly connected to the second fixing frame (32).

3. A clustered spiral sedimentation device according to claim 2, characterized in that: The first fixing frame (31) and the second fixing frame (32) are both disc-shaped; The first fixing frame (31) is provided with a plurality of through holes for fixing the pin shaft with a hole (23); The second fixing frame (32) is provided with a plurality of through holes for fixing the fisheye screws (24).

4. The clustered spiral sedimentation device according to claim 1, characterized in that: A first sleeve (41) is installed between the first fixing frame (31) and the left joint (5); A second sleeve (42) is installed between the second fixing frame (32) and the right joint (6); The first sleeve (41) and the second sleeve (42) are both threadedly connected to the inner wall of the outer cylinder (1).

5. The clustered spiral sedimentation device according to claim 1, characterized in that: A number of connection holes are machined on the wall of the outer cylinder (1).

6. The clustered spiral sedimentation device according to claim 1, characterized in that: The spiral tubular scale depositing body (21) is made of a metal alloy material or a cation exchange resin material having adsorption properties for metal cations.

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