Thickened oil recovery desanding device

Abstract

The utility model discloses a heavy oil recovery desanding device which comprises a cyclone desander main body, a sand collecting tank, a test separator, a production separator and a sand washing waste oil recovery tank, a desanding filter is arranged in the cyclone desander main body, and the cyclone desander main body and the sand collecting tank are communicated with each other; an inlet of the cyclone desander is provided with a desanding device inlet valve, a forward sand washing valve is arranged behind the desanding device inlet valve, an outlet of the cyclone desander is provided with a desanding device outlet valve, a back sand washing valve is arranged in front of the desanding filter outlet valve, the desanding filter is communicated with the post-filtering chamber, and the post-filtering chamber is communicated with the post-filtering chamber. The outer wall of the post-filtering chamber is communicated with an outlet of the cyclone desander, and the desanding filter is communicated with the post-filtering chamber and is integrally cast. The device is easy to operate, and the problems that pipelines and equipment are corroded and blocked by gravels in the crude oil transportation process are solved by arranging the rotational flow filtering and desanding device.

Description

Technical Field

[0001] The present application relates to the technical field of crude oil production and sand removal, and in particular to a heavy oil production and sand removal device. Background Art

[0002] Sand production is the phenomenon that gravel migrates out of the oil layer along with the fluid during the oil and gas production process in the oil field. Heavy oil is a crude oil with a high asphaltene and colloid content and a high viscosity, and the sand production phenomenon is more obvious. Nowadays, the oil production volume is high, and due to the bottleneck of anti-sanding technology, the sand production problem is becoming more and more serious, and the anti-sand means have also reached a bottleneck, and the sand production problem is inevitable. Sand-containing crude oil will cause a series of problems such as pipeline corrosion, blockage, and damage to gathering and transportation equipment during transportation. Gravel causes erosion and wear on the pipeline, thereby damaging the equipment, resulting in the frequent replacement of crude oil transportation pipelines, valves, elbows, etc., causing a lot of economic losses. Therefore, it is very necessary to remove sand from the crude oil after production, especially heavy oil. Therefore, a heavy oil production and sand removal device is proposed to address the above problems. Summary of the invention

[0003] In this embodiment, a heavy oil production and sand removal device is provided to solve the problem in the prior art that heavy oil sand production causes pipeline corrosion and blockage to pipelines and equipment during transportation.

[0004] According to one aspect of the present application, a heavy oil production and desanding device is provided, comprising a cyclone desander main body, a sand collecting tank, a test separator, a production separator and a sand flushing waste oil recovery tank, wherein a sand removal filter is arranged inside the cyclone desander main body, and the cyclone desander main body and the sand collecting tank are connected to each other.

[0005] The inlet of the cyclone desander is provided with an inlet valve of the desander device, and a positive sand flushing valve is provided behind the inlet valve of the desander device.

[0006] The outlet of the cyclone desander is provided with a desander outlet valve, and a backwash sand valve is provided in front of the inlet valve of the test separator.

[0007] The desanding filter is connected to the post-filter chamber, and the outer wall of the post-filter chamber is connected to the outlet of the cyclone desanding device. The desanding filter is connected to the post-filter chamber and is cast as one piece.

[0008] Furthermore, the heavy oil production and desanding device is characterized in that the main body of the cyclone desander is in an inverted cone shape.

[0009] Furthermore, the heavy oil production and desanding device is characterized in that the cyclone desander inlet is tangent to the cyclone desander body.

[0010] Furthermore, the heavy oil production and sand removal device is characterized in that the pipelines of the forward sand flushing valve and the reverse sand flushing valve are connected to the water phase pipeline at the bottom of the production separator.

[0011] Through the above-mentioned embodiments of the present application, a cyclone filtration and sand removal device is adopted to solve the problem of corrosion and blockage of pipelines and equipment caused by sand and gravel during crude oil transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0014] Figure 2 This is a schematic structural diagram of a cyclone desander body according to an embodiment of the present application;

[0015] Figure 3 This is a schematic top view of the structure of a cyclone desander body according to an embodiment of the present application;

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure enlargement of the cyclone desander body according to an embodiment of the present application.

[0017] In the figure: 1. positive sand flushing valve, 2. sand removal device inlet valve, 3. cyclone desander body, 4. sand collecting tank, 5. backwash sand valve, 6. test separator inlet valve, 7. test separator, 8. production separator inlet valve, 9. production separator, 10. production separator outlet valve, 11. sand flushing waste oil recovery tank, 12. post-filtration chamber, 13. sand removal filter, 14. cyclone desander inlet, 15. cyclone desander outlet. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the present application, 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 only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0021] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0022] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] The sand removal device in this embodiment can be applied to various crude oil processing processes. For example, this embodiment provides the following crude oil production process, the crude oil production process in this embodiment.

[0025] It includes a test manifold, a production manifold, a test separator, a production separator, and a crude oil export pump. The upstream of the test manifold is connected to the wellhead oil nozzle of a single well, and the downstream of the test manifold is connected to the inlet valve of the test separator. The single-well test manifold is merged into the production manifold after passing through the test separator. The crude oil in the production manifold is transported to the downstream after passing through the production separator and the export pump. The production water separated by the production separator is discharged after being treated by the inclined plate deoiler and the dissolved air flotation device and is qualified.

[0026] Of course, this embodiment can also be used in other crude oil processing processes. No further description will be given here, and the alarm device of the embodiment of the present application will be introduced below.

[0027] See also Figure 1-4 As shown, a heavy oil production and desanding device comprises a cyclone desander body 3, a sand collecting tank 4, a test separator 7, a production separator 9 and a sand flushing waste oil recovery tank 11, wherein a desanding filter 13 is arranged inside the cyclone desander body 3, and the cyclone desander body 3 and the sand collecting tank 4 are connected to each other;

[0028] The cyclone desander inlet 14 is provided with a desander device inlet valve 2. The single well crude oil enters the cyclone desander main body 3 through the desander device inlet valve 2. The sand-carrying crude oil is cyclonized and centrifuged in the cyclone desander main body 3. After centrifugation, the crude oil enters the test separator 7 through the desander filter 13. After separation and metering, it enters the production separator 9 through the production separator inlet valve 8, and the sand enters the sand collecting tank 4; a positive sand flushing valve 1 is provided behind the desander device inlet valve 2. The positive sand flushing valve 1 is connected to the production water outlet of the production separator 9 upstream and connected to the cyclone desander inlet 14 downstream. The positive sand flushing valve 1 can introduce the production water of the production separator 9 into the cyclone desander inlet 14, which is convenient for cleaning the inner wall of the cyclone desander main body 3, the inner wall of the desander filter 13, the sand collecting tank 4 and the post-filtration chamber 12; a back-flushing sand valve 5 is provided behind the test separator inlet valve 6. The back-flushing sand valve 5 is connected to the production water outlet of the production separator 9 upstream and connected to the cyclone The outlet 15 of the cyclone desander is provided, and the backwash sand valve 5 can be used to introduce the production water of the production separator 9 into the outlet 15 of the cyclone desander, so as to facilitate the cleaning of the inner wall of the cyclone desander body 3 and the outer wall of the sand removal filter 13; the sand removal filter 13 can further filter the sand and gravel that are not completely separated by the cyclone desander body 3 on the outer wall, the sand removal filter 13 is connected with the post-filtration chamber 12, and the outer wall of the post-filtration chamber 12 is connected with the outlet 15 of the cyclone desander; the sand removal filter 13 is connected with the post-filtration chamber 12 and is cast as one piece, which is convenient for installation; the cyclone desander body 3 is in an inverted cone shape, and the cyclone desander inlet 14 is tangent to the cyclone desander body 3, and the crude oil can generate a sufficiently large centrifugal force after entering the cyclone desander body 3; the pipelines of the positive sand flushing valve 1 and the backwash sand valve 5 are connected with the water phase pipeline at the bottom of the production separator 9, and the sand and gravel in the cyclone desander body 3 and the sand collecting tank 4 are flushed by the high-temperature production water separated by the production separator 9.

[0029] When the utility model is in use, the flow from the sand-producing oil well to the cyclone desander inlet 14 is conducted, and the flow from the test separator inlet valve 6 to the production separator inlet valve 8 is conducted, the crude oil is separated by the production separator 9 and then transported out, and the sand-carrying crude oil is cyclone-centrifuged and filtered in the cyclone desander main body 3 and the desander filter 13, and the gravel is collected in the sand collecting trough 4, and the gravel in the sand collecting trough 4 is regularly discharged to the sand flushing waste oil recovery tank 11, and when the positive sand flushing valve 1 is used to clean the inner wall of the cyclone desander main body 3, the inner wall of the desander filter 13, the sand collecting trough 4 and the post-filtration chamber 12, the single well test flow needs to be switched to the production separator 9, and when the back sand flushing valve 5 is used to clean the inner wall of the cyclone desander main body 3 and the outer wall of the desander filter 13, the single well test flow needs to be switched to the production separator 9 as well.

[0030] The benefits of this application are:

[0031] 1. The present application is simple to operate. A cyclone desander body 3 is arranged between the sand-producing oil well and the test separator 7. The sand-producing crude oil is centrifugally filtered in the cyclone desander body 3, and the sand is collected in the sand collecting tank 4. The sand in the sand collecting tank 4 is regularly discharged to the sand-washing waste oil recovery tank 11, so as to prevent the crude oil from carrying sand through the production separator outlet valve 10 to cause corrosion and blockage to the downstream equipment and pipelines;

[0032] 2. The present application has a reasonable structure. Through the positive sand flushing valve 1 and the reverse sand flushing valve 5, the production water separated by the production separator 9 can be used to clean the inner wall of the cyclone desander body 3, the inner wall of the desander filter 13, the outer wall of the desander filter 13, the sand collecting tank 4 and the post-filtration chamber 12.

[0033] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art, and needless to say, the content protected by this application does not involve improvements to software and methods.

[0034] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heavy oil production and sand removal device, characterized in that: The invention comprises a cyclone desander main body (3), a sand collecting tank (4), a test separator (7), a production separator (9) and a sand flushing waste oil recovery tank (11); a sand removal filter (13) is arranged inside the cyclone desander main body (3); and the cyclone desander main body (3) and the sand collecting tank (4) are connected to each other; The cyclone desander inlet (14) is provided with a desander inlet valve (2), and a positive sand flushing valve (1) is provided behind the desander inlet valve (2); The cyclone desander outlet (15) is provided with a test separator inlet valve (6), and a backwash sand valve (5) is provided in front of the test separator inlet valve (6); The desanding filter (13) is connected to the post-filtration chamber (12), and the outer wall of the post-filtration chamber (12) is connected to the outlet (15) of the cyclone desanding device; The sand removal filter (13) is communicated with the post-filtration chamber (12) and is cast as an integral unit.

2. A heavy oil production and sand removal device according to claim 1, characterized in that: The cyclone desander body (3) is in an inverted cone shape.

3. A heavy oil production and sand removal device according to claim 1, characterized in that: The cyclone desander inlet (14) is tangent to the cyclone desander body (3).

4. A heavy oil production and sand removal device according to claim 1, characterized in that: The pipelines of the positive sand flushing valve (1) and the reverse sand flushing valve (5) are connected to the water phase pipeline at the bottom of the production separator (9).

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