Self-cleaning sand remover

Abstract

The invention relates to the technical field of oilfield exploitation desanding, in particular to a self-cleaning type desander which comprises a frame box with an opening in the bottom, a regulation and control device and a desanding device, a liquid conveying pipe of an external hydraulic system pipeline conveys liquid into a communicating pipe, filled hydraulic oil extrudes a connecting rod, a rubber ring arranged on the outer side of the connecting rod slides on the inner wall of a sleeve, and the desanding device is arranged on the inner wall of the sleeve. A rubber ring arranged on the outer side of the first annular plate and a rubber ring arranged on the outer side of the second annular plate slide on the inner wall of the column casing, a rubber ring arranged on the inner side of the first annular plate and a rubber ring arranged on the inner side of the second annular plate slide on the outer side of the circular pipe, and cleaning liquid input through pressurization of the water pump device extrudes the cover disc and is input into the circular pipe; through the arrangement, the device main body can conveniently filter the fine gravel doped in the petroleum stock solution and can conveniently carry out dual-mode switching treatment of self-cleaning and cleaning on the composite filter plate, so that the use efficiency of the sand remover device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sand removal in oilfield exploitation, and particularly to a self-cleaning sand remover. Background Art

[0002] The sand removers used in oilfield exploitation are mainly divided into two types: filtration sand removal and cyclone sand removal. Taking the sand remover device of the above-mentioned filtration sand removal type as an example, the sand-containing fluid is passed through a composite filter plate of a porous medium, and solid particles with a particle size larger than the pore diameter of the composite filter plate are intercepted, so that the sand and solid are separated from the fluid.

[0003] For some sand remover devices of the filtration sand removal type, the main body of the device is not convenient for switching between the dual modes of filtering the fine sand mixed in the crude oil and self-cleaning the composite filter plate, resulting in a low use efficiency of the sand remover device. Therefore, a self-cleaning sand remover is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a self-cleaning sand remover, which is used to solve the problem that for some sand remover devices of the filtration sand removal type, the main body of the device is not convenient for switching between the dual modes of filtering the fine sand mixed in the crude oil and self-cleaning the composite filter plate, resulting in a low use efficiency of the sand remover device.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A self-cleaning sand remover, comprising a frame box with an opening at the bottom, a control device and a sand removal device. The control device and the sand removal device are arranged inside the frame box. The control device includes a column cylinder, a communication pipe, a sleeve, a connecting rod, a first ring plate, a second ring plate, a round rod, a first clamping block and a second clamping block. A column cylinder is fixedly arranged inside the frame box. A communication pipe is fixedly arranged inside the left end of the column cylinder and inside the left end of the frame box. A sleeve is fixedly arranged at the right end of the communication pipe. A rubber ring arranged on the outer side of the connecting rod is slidably arranged on the inner wall of the sleeve. A first ring plate is fixedly arranged at one end of the connecting rod away from the communication pipe. A second ring plate is arranged at one end of the first ring plate away from the sleeve. A round rod is fixedly arranged between the first ring plate and the second ring plate. A first clamping block and a second clamping block are fixedly arranged on the inner wall of the left end of the column cylinder. The sand removal device includes a diversion pipe, a round pipe, a composite filter plate, an electric control check valve, a cover plate, a connecting cover, an insertion cylinder, an insertion rod and a buffer spring. A diversion pipe is fixedly arranged inside the top end of the frame box. A round pipe is fixedly arranged at the bottom end of the diversion pipe. A composite filter plate is fixedly arranged inside the round pipe. An electric control check valve is fixedly arranged inside the diversion pipe. A rubber ring arranged on the outer side of the cover plate is in close contact with the inner wall of the round pipe. A connecting cover is fixedly arranged inside the round pipe. An insertion cylinder is fixedly arranged at one end of the connecting cover close to the cover plate. An insertion rod is fixedly arranged at one end of the cover plate close to the connecting cover. A buffer spring is fixedly arranged between the cover plate and the connecting cover.

[0007] Preferably, rubber rings arranged on the outer side of the first ring plate and on the outer side of the second ring plate are slidably arranged on the inner wall of the column cylinder.

[0008] Preferably, rubber rings arranged on the inner side of the first ring plate and on the inner side of the second ring plate are slidably arranged on the outer side of the round pipe.

[0009] Preferably, the first clamping block is in close contact with the first ring plate.

[0010] Preferably, two communication pipes fixedly connected to the left end of the sleeve are communicated with an external hydraulic system pipeline.

[0011] Preferably, a through hole is arranged inside the connecting cover. A cleaning pipe is fixedly arranged inside the right end of the round pipe, the right end of the column cylinder and the right end of the frame box. A water pump device is fixedly arranged inside the right end of the frame box and inside the cleaning pipe.

[0012] Preferably, a rubber ring arranged on the inner wall of the insertion cylinder is slidably arranged on the outer side of the insertion rod. The buffer spring is spirally distributed on the outer sides of the insertion cylinder and the insertion rod.

[0013] Compared with the prior art, the beneficial effects of the invention are:

[0014] 1. In the present invention, the crude oil is transported along the through groove provided inside the cylinder, and the fine sand and gravel doped in the crude oil are filtered through the composite filter plate. The infusion pipe of the external hydraulic system pipeline infuses liquid into the communicating pipe, and hydraulic oil is input at the middle position of the sleeve. The injected hydraulic oil presses the connecting rod. The rubber ring provided on the outer side of the connecting rod slides with the inner wall of the sleeve. The rubber rings provided on the outer sides of the first ring plate and the second ring plate slide with the inner wall of the cylinder. The rubber rings provided on the inner sides of the first ring plate and the second ring plate slide with the outer side of the round pipe. The water pump device is started, and the backwashing cleaning liquid is input into the round pipe through the water pump pipeline. The cleaning liquid pressurized by the water pump presses the cover plate. The insertion rod slides with the rubber ring provided inside the insertion cylinder. The cleaning liquid is input into the round pipe to perform backwashing cleaning on the fine sand and gravel inside the composite filter plate. The fine sand and gravel and the cleaning liquid are discharged through the front end ring opening and the rear end ring opening of the cylinder. Through the above settings, the device body can conveniently perform dual-mode switching processing on filtering the fine sand and gravel doped in the crude oil and self-cleaning the composite filter plate, improving the use efficiency of the desander device;

[0015] 2. In the present invention, the rubber rings provided on the outer sides of the first ring plate and the second ring plate slide with the inner wall of the cylinder, wherein the first ring plate and the second ring plate perform sealed sliding with the inner wall of the cylinder. The rubber rings provided on the inner sides of the first ring plate and the second ring plate slide with the outer side of the round pipe. The first ring plate and the second ring plate are provided with sealed sliding settings with the outer side of the round pipe. The first ring plate is provided with a rubber ring through the first clamping block and a rubber ring through the second clamping block for abutting and limiting settings. Through the above settings, the device body has a good sealing and leakage prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the invention;

[0017] Figure 2 is a schematic diagram of the internal cross-section of the invention box;

[0018] Figure 3 for the invention Figure 2 is an enlarged schematic diagram of the structure at A of the invention;

[0019] Figure 4 is a cross-sectional view of the round pipe and the composite filter plate of the invention;

[0020] Figure 5 for the invention Figure 4 is an enlarged schematic diagram of the structure at B of the invention;

[0021] Figure 6 is a partial cross-sectional view of the control device and the desanding device of the invention;

[0022] Figure 7 for the invention Figure 6 is an enlarged schematic diagram of the structure at C of the invention.

[0023] In the figure: 1. Frame box; 2. Regulation device; 21. Cylindrical tube; 22. Connecting pipe; 23. Sleeve; 24. Connecting rod; 25. First ring plate; 26. Second ring plate; 27. Round rod; 28. First clamping block; 29. Second clamping block; 3. Sand removal device; 31. Diversion pipe; 32. Round pipe; 33. Composite filter plate; 34. Electric control check valve; 35. Cover plate; 36. Connecting cover; 37. Insertion cylinder; 38. Insertion rod; 39. Buffer spring. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the invention.

[0025] In the embodiments of the invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the position or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Similarly, words such as "a", "one" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0026] In addition, in the embodiments of the invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the invention can be understood according to specific situations.

[0027] Please refer to Figure 1-7 , the present invention provides a technical solution:

[0028] A self-cleaning sand remover, comprising a frame box 1 with an opening at the bottom, a control device 2 and a sand removal device 3. The control device 2 and the sand removal device 3 are arranged inside the frame box 1. The control device 2 includes a cylinder 21, a connecting pipe 22, a sleeve 23, a connecting rod 24, a first ring plate 25, a second ring plate 26, a round rod 27, a first clamping block 28 and a second clamping block 29. A cylinder 21 is fixedly arranged inside the frame box 1. A connecting pipe 22 is fixedly arranged inside the left end of the cylinder 21 and inside the left end of the frame box 1. A sleeve 23 is fixedly arranged at the right end of the connecting pipe 22. A rubber ring arranged on the outer side of the connecting rod 24 is slidably arranged on the inner wall of the sleeve 23. A first ring plate 25 is fixedly arranged at one end of the connecting rod 24 away from the connecting pipe 22. A second ring plate 26 is arranged at one end of the first ring plate 25 away from the sleeve 23. A round rod 27 is fixedly arranged between the first ring plate 25 and the second ring plate 26. A first clamping block 28 and a second clamping block 29 are fixedly arranged on the inner wall of the left end of the cylinder 21. The sand removal device 3 includes a diversion pipe 31, a round pipe 32, a composite filter plate 33, an electro-controlled one-way valve 34, a cover plate 35, a connecting cover 36, an insertion cylinder 37, an insertion rod 38 and a buffer spring 39. A diversion pipe 31 is fixedly arranged inside the top end of the frame box 1. A round pipe 32 is fixedly arranged at the bottom end of the diversion pipe 31. A composite filter plate 33 is fixedly arranged inside the round pipe 32. An electro-controlled one-way valve 34 is fixedly arranged inside the diversion pipe 31. A rubber ring arranged on the outer side of the inner ring plate inside the round pipe 32 is in close contact with the outer side of the cover plate 35. A connecting cover 36 is fixedly arranged inside the round pipe 32. An insertion cylinder 37 is fixedly arranged at one end of the connecting cover 36 close to the cover plate 35. An insertion rod 38 is fixedly arranged at one end of the cover plate 35 close to the connecting cover 36. A buffer spring 39 is fixedly arranged between the cover plate 35 and the connecting cover 36.

[0029] Rubber rings arranged on the outer side of the first ring plate 25 and rubber rings arranged on the outer side of the second ring plate 26 are slidably arranged on the inner wall of the cylinder 21. Through the above arrangement, the first ring plate 25 and the second ring plate 26 are hermetically and slidably arranged on the inner wall of the cylinder 21.

[0030] Rubber rings arranged on the inner side of the first ring plate 25 and rubber rings arranged on the inner side of the second ring plate 26 are slidably arranged on the outer side of the round pipe 32. Through the above arrangement, the first ring plate 25 and the second ring plate 26 are hermetically and slidably arranged on the outer side of the round pipe 32.

[0031] The first clamping block 28 is in close contact with the first ring plate 25. Through the above arrangement, the first ring plate 25 is provided with a contact limit through the first clamping block 28 and the second clamping block 29.

[0032] Two connecting pipes 22 fixedly and communicatively arranged at the left end of the sleeve 23 are communicatively arranged with the pipeline of the external hydraulic system. Through the above arrangement, the infusion pipe of the external hydraulic system pipeline is fixedly and communicatively arranged with the connecting pipe 22 arranged at the rear side, and the drain pipe of the external hydraulic system pipeline is fixedly and communicatively arranged with the connecting pipe 22 arranged at the front side.

[0033] A through hole is provided inside the connecting cover 36. A cleaning pipe is fixedly arranged inside the right end of the round pipe 32, the right end of the column cylinder 21, and the right end of the frame box 1. A water pump device is fixedly arranged inside the right end of the frame box 1 and the cleaning pipe. Through the above arrangement, the water pump device inputs external cleaning liquid into the round pipe 32.

[0034] The outer side of the insertion rod 38 is slidably arranged with a rubber ring provided on the inner wall of the insertion cylinder 37. The buffer spring 39 is arranged in a spiral distribution on the outer sides of the insertion cylinder 37 and the insertion rod 38. Through the above arrangement, the buffer spring 39 is used for elastic limit setting between the cover plate 35 and the connecting cover 36.

[0035] Working process: The present invention provides a self-cleaning sand remover. The device body is convenient for dual-mode switching processing of filtering the fine sand and gravel doped in the petroleum stock solution and self-cleaning the composite filter plate 33, improving the use efficiency of the sand remover device, and the sealing and leakage prevention effect of the device body is relatively good.

[0036] The top pipe orifice of the diversion pipe 31 is fixedly connected and communicated with the pipeline of the liquid extraction pump device. A water pump device is fixedly arranged inside the right end of the frame box 1 and the cleaning pipe. Two connecting pipes 22 fixedly connected and communicated at the left end of the sleeve 23 are communicated with the pipeline of the external hydraulic system. Among them, the liquid infusion pipe of the external hydraulic system pipeline is fixedly connected and communicated with the connecting pipe 22 arranged at the rear side, and the liquid discharge pipe of the external hydraulic system pipeline is fixedly connected and communicated with the connecting pipe 22 arranged at the front side. The liquid extraction pump device, the water pump device, the hydraulic system pipeline, and the electric control one-way valve 34 arranged in the device are controlled through an external PLC controller, and the liquid extraction pump device, the water pump device, the hydraulic system pipeline, and the electric control one-way valve 34 arranged as above are electrically connected with an external power supply device.

[0037] In the initial position, the first clamping block 28 is in close contact with the first ring plate 25. The liquid extraction pump device is started for liquid extraction treatment, and the electro-controlled one-way valve 34 is started to form a one-way passage for vertical upward liquid transportation. The petroleum stock solution is transported along the through groove provided inside the cylinder 21, and the fine sand and gravel doped inside the petroleum stock solution are filtered through the composite filter plate 33. The filtered petroleum stock solution enters the inside of the round tube 32 and the inside of the diversion tube 31 for upward liquid discharge treatment. When the composite filter plate 33 is periodically backflushed and cleaned, the liquid extraction pump device is turned off, and the electro-controlled one-way valve 34 is closed. The liquid delivery pipe of the external hydraulic system pipeline delivers liquid into the communicating pipe 22, and hydraulic oil is input at the middle position of the sleeve 23. The input hydraulic oil squeezes the connecting rod 24, causing the symmetrically arranged connecting rods 24 on the front and rear sides to move outward. The rubber ring provided on the outer side of the connecting rod 24 slides with the inner wall of the sleeve 23, and the rubber rings provided on the outer sides of the first ring plate 25 and the second ring plate 26 slide with the inner wall of the cylinder 21. The rubber rings provided on the inner sides of the first ring plate 25 and the second ring plate 26 slide with the outer side of the round tube 32 until the second clamping block 29 is in close contact with the first ring plate 25. The water pump device is started, and the backflush cleaning liquid is input into the inside of the round tube 32 through the water pump pipeline. The inside of the round tube 32 is communicated with the through hole provided inside the connecting cover 36. The cleaning liquid pressurized by the water pump squeezes the cover plate 35, driving the cover plate 35 and the inserting rod 38 to move towards one end away from the connecting cover 36. The buffer spring 39 is in a stretched state. The inserting rod 38 slides with the rubber ring provided inside the inserting cylinder 37. At this time, the rubber ring provided on the outer side of the cover plate 35 is separated from the ring plate provided inside the round tube 32. The cleaning liquid is input into the inside of the round tube 32 to perform backflush cleaning treatment on the fine sand and gravel inside the composite filter plate 33. The fine sand and gravel and the cleaning liquid are discharged through the front end ring opening and the rear end ring opening of the cylinder 21. After the sand discharge treatment, the water pump device is turned off, and the liquid discharge pipe of the external hydraulic system pipeline discharges liquid into the communicating pipe 22 to draw back the hydraulic oil at the middle position of the sleeve 23, causing the first ring plate 25 and the second ring plate 26 to reset until the first clamping block 28 is in close contact with the first ring plate 25.

[0038] Although the embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning sand remover, comprising a frame box (1) with an opening at the bottom, a regulating device (2) and a sand removing device (3), characterized in that: Inside the box (1), a control device (2) and a sand removal device (3) are provided. The control device (2) includes a column cylinder (21), a connecting pipe (22), a sleeve (23), a connecting rod (24), a first ring plate (25), a second ring plate (26), a round rod (27), a first clamping block (28), and a second clamping block (29). Inside the box (1), the column cylinder (21) is fixedly arranged. Inside the left end of the column cylinder (21) and inside the left end of the box (1), the connecting pipe (22) is fixedly arranged. The right end of the connecting pipe (22) is fixedly provided with the sleeve (23). The inner wall of the sleeve (23) is slidably arranged with a rubber ring on the outer side of the connecting rod (24). One end of the connecting rod (24) away from the connecting pipe (22) is fixedly provided with the first ring plate (25). A second ring plate (26) is arranged at one end of the first ring plate (25) away from the sleeve (23). A round rod (27) is fixedly arranged between the first ring plate (25) and the second ring plate (26). The first clamping block (28) and the second clamping block (29) are fixedly arranged on the inner wall of the left end of the column cylinder (21). The sand removal device (3) includes a diversion pipe (31), a round pipe (32), a composite filter plate (33), an electronically controlled one-way valve (34), a cover plate (35), a connecting cover (36), an insertion cylinder (37), an insertion rod (38), and a buffer spring (39). Inside the top of the box (1), the diversion pipe (31) is fixedly arranged. The bottom end of the diversion pipe (31) is fixedly provided with the round pipe (32). The composite filter plate (33) is fixedly arranged inside the round pipe (32). The electronically controlled one-way valve (34) is fixedly arranged inside the diversion pipe (31). The rubber ring arranged on the outer side of the cover plate (35) is in close contact with the inner wall of the round pipe (32). The connecting cover (36) is fixedly arranged inside the round pipe (32). One end of the connecting cover (36) close to the cover plate (35) is fixedly provided with the insertion cylinder (37). One end of the cover plate (35) close to the connecting cover (36) is fixedly provided with the insertion rod (38). A buffer spring (39) is fixedly arranged between the cover plate (35) and the connecting cover (36).

2. The self-cleaning sand remover according to claim 1, wherein: The rubber rings arranged on the outer sides of the first ring plate (25) and the second ring plate (26) are slidably arranged with the inner wall of the column cylinder (21).

3. The self-cleaning desander according to claim 1, characterized in that: The rubber rings arranged on the inner sides of the first ring plate (25) and the second ring plate (26) are slidably arranged with the outer side of the round pipe (32).

4. The self-cleaning desander according to claim 1, characterized in that: The first clamping block (28) is in close contact with the first ring plate (25).

5. The self-cleaning sand remover according to claim 1, characterized in that: The two connecting pipes (22) fixedly and communicatively arranged at the left end of the sleeve (23) are communicatively arranged with the external hydraulic system pipeline.

6. The self-cleaning desander according to claim 1, wherein: A through hole is arranged inside the connecting cover (36). At the right end of the round pipe (32), at the right end of the column cylinder (21), and inside the right end of the box (1), a cleaning pipe is fixedly arranged. Inside the right end of the box (1) and inside the cleaning pipe, a water pump device is fixedly arranged.

7. The self-cleaning sand remover according to claim 1, characterized in that: The outer side of the insertion rod (38) is slidably arranged with the rubber ring arranged on the inner wall of the insertion cylinder (37). The buffer spring (39) is arranged in a spiral distribution on the outer sides of the insertion cylinder (37) and the insertion rod (38).

Images