Device and method for detecting gas produced by CO2 oil displacement exploitation

Abstract

The invention discloses a CO2 oil displacement exploitation output gas detection device and method, and relates to the technical field of CO2 oil displacement exploitation output gas detection, the device comprises a filter shell, a filter mechanism, a gas delivery pipe, a cleaning assembly and a scraper mechanism, the cleaning assembly comprises a cleaning shell and a rolling brush mechanism, the rolling brush mechanism comprises a sleeve and a cleaning brush, the sleeve is sleeved with the cleaning brush, and the cleaning brush is sleeved with the filter mechanism. The filter screen can be automatically cleaned through the cleaning assembly, so that the filter screen does not need to be manually detached for cleaning, the filter screen located in the range of the gas conveying pipe is always kept in a good filtering state through rotation of the filter mechanism, and the gas filtering effect is effectively improved; the rolling brush mechanism can slide up and down to clean the filter screen in all directions when rotating to clean the filter screen, the rolling brush mechanism can be further cleaned through the scraper mechanism, cleanliness of the cleaning brush is ensured, and the cleaning effect of the cleaning brush on the filter screen is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of CO2 oil recovery production gas detection, in particular to a CO2 oil recovery production gas detection device and method. Background Art

[0002] The CO2 oil recovery output gas detection device is a device that monitors the gas components in the production well in an oil field that uses CO2 oil recovery technology. It is conducive to timely discovery and treatment of oil and gas crosstalk and other problems, ensuring the safety and efficiency of the production process. In order to improve the accuracy of gas detection, the collected gas samples need to be pre-processed, that is, to remove particulate matter, oil mist and moisture in the gas through drying and filtration.

[0003] At present, filters are often used to filter gas samples. Since a large amount of particulate matter and oil mist are mixed in the gas samples, the filters are prone to clogging when filtering the gas, and the filter needs to be frequently cleaned, which is mainly done by manual disassembly and replacement of the filter, which is rather troublesome. In addition, during the use of the filter, the air permeability of the filter will continue to decrease over time, which will seriously affect the gas filtering effect and greatly shorten the service life of the filter.

[0004] Therefore, it is necessary to provide a CO2 oil recovery output gas detection device and method to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a CO2 oil recovery output gas detection device, comprising a preprocessing unit, a detection unit and a data processing unit, the preprocessing unit comprising a filtering system and a drying system, the filtering system comprising a filtering housing, a filtering mechanism, a gas pipe, a cleaning component and a scraper mechanism, wherein the filtering mechanism is rotatably arranged on the filtering housing, gas pipes are fixedly arranged on both sides of the upper part of the filtering housing, a notch is provided in the lower part of the filtering housing and a cleaning component is fixedly arranged, a scraper mechanism is symmetrically arranged in the cleaning component, and a spray pipe and a drying pipe are also symmetrically arranged on the filtering housing.

[0006] Preferably, the cleaning component includes a cleaning shell and a roller brush mechanism, wherein the cleaning shell is fixedly connected to the filter shell, the filter shell is communicated with the cleaning shell through the notch, the top and bottom of the cleaning shell are symmetrically rotated with the filter mechanism as a symmetry point and are fixedly provided with a driving shaft, the driving shaft is driven by a motor, and a roller brush mechanism is provided between the driving shaft and the adjusting shaft.

[0007] Preferably, the roller brush mechanism includes a sleeve and a cleaning brush, wherein a cleaning brush is fixedly arranged in a circle on the outer side of the sleeve, a plurality of slots are vertically provided on the top of the sleeve, and an annular groove is obliquely provided on the bottom of the sleeve.

[0008] Preferably, a plurality of bayonet pins are fixedly arranged on the driving shaft, and the bayonet pins are inserted into the bayonet slots and slide along the bayonet slots;

[0009] A guide block is fixedly arranged on the adjusting shaft, the adjusting shaft is rotatably connected to the sleeve, and the guide block is inserted into the annular groove and slides along the annular groove.

[0010] Preferably, the filter mechanism comprises a filter seat and a filter net, wherein the filter seat is rotatably arranged in the filter housing, an annular filter net is fixedly arranged on the filter seat, and the filter net is in contact with the roller brush mechanism through the notch.

[0011] Preferably, the scraper mechanism includes a rotating shaft and an arc-shaped plate, wherein the rotating shaft is rotatably arranged on the cleaning shell and driven by motor 2, four arc-shaped plates are fixedly arranged in a circle on the rotating shaft, and a plurality of grooves are opened at the output end of the arc-shaped plate, and the cleaning brush can pass through the grooves.

[0012] Preferably, a plurality of tooth plates having the same shape and size as the tooth sockets are fixedly arranged on one side of the cleaning shell close to the scraper mechanism, and a cleaning block is slidably arranged on the cleaning shell, the cleaning block is arc-shaped and can fit with the inner wall of the arc-shaped plate, and a sewage box is symmetrically slidably arranged on the bottom of the cleaning shell, a vertical plate is fixedly arranged in the sewage box, and the vertical plate can fit with the lower bottom surface of the cleaning block.

[0013] A method for detecting gas produced by CO2 oil recovery comprises the following steps:

[0014] S1. Filtering and drying the gas sample collected from the oil well through the filtering system and drying system in the pretreatment unit;

[0015] S2, delivering the gas sample to the filter housing through the gas delivery pipe and filtering the gas sample through the filter mechanism, while driving the filter mechanism to rotate, so that the filter within the gas delivery pipe is always replaced, ensuring that the filter always maintains an efficient filtering effect;

[0016] S2.1, using the spray cleaning pipe to spray the cleaning agent onto the filter screen, and then using the cleaning component to clean the filter screen to remove the oil stains and impurities on the filter screen;

[0017] S2.2, the driving shaft drives the sleeve to rotate and drives the cleaning brush to rotate along the surface of the filter to clean the filter, and at the same time, the sleeve slides up and down under the action of the adjusting shaft, so that the cleaning brush slides up and down along the surface of the filter;

[0018] S3, using the scraper mechanism to clean the cleaning brush, and scraping the cleaned oil and waste into the sewage box through the cleaning block;

[0019] S4. Pass the pretreated gas into the detection unit for detection, use the non-scattering infrared gas sensor to accurately detect the CO2 concentration in the gas, and process, store and transmit the data collected by the non-scattering infrared gas sensor through the data processing unit.

[0020] Compared with the prior art, the present invention provides a CO2 oil recovery output gas detection device and method, which has the following beneficial effects:

[0021] The present invention can clean the filter screen autonomously by providing a cleaning component, thereby eliminating the need for manual disassembly of the filter screen for cleaning, and during the gas filtering process, the filter screen located within the gas pipe range is always kept in a good filtering state through the rotation of the filter mechanism, thereby effectively improving the filtering effect on the gas, and in addition, by providing an adjusting shaft, the roller brush mechanism can slide up and down when rotating to clean the filter screen, thereby performing all-round cleaning of the filter screen, and the scraper mechanism can further clean the roller brush mechanism by providing a cleaning brush to ensure the cleanliness of the cleaning brush, thereby improving the cleaning effect of the cleaning brush on the filter screen, and the roller brush mechanism can further change the position of the cleaning brush in the tooth socket during the process of sliding up and down, thereby avoiding wear and tear caused by friction between the cleaning brush and the tooth socket at a certain position for a long time, thereby improving the service life of the cleaning brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the filtration system in the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the cleaning component in the present invention;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 5 It is a structural schematic diagram of the roller brush mechanism in the present invention;

[0027] Figure 6 It is a structural schematic diagram of the filtering mechanism in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the scraper mechanism in the present invention;

[0029] In the figure: 1. filter housing; 2. filter mechanism; 21. filter seat; 22. filter screen; 3. air pipe; 4. cleaning assembly; 41. cleaning shell; 411. tooth plate; 412. cleaning block; 413. sewage box; 42. roller brush mechanism; 421. sleeve; 422. cleaning brush; 423. slot; 424. annular groove; 43. drive shaft; 431. bayonet; 44. adjustment shaft; 441. guide block; 5. scraper mechanism; 51. rotating shaft; 52. arc plate; 53. tooth slot; 6. spray pipe; 7. drying pipe. DETAILED DESCRIPTION

[0030] See also Figure 1 to Figure 7 In an embodiment of the present invention, a CO2 oil recovery output gas detection device includes a preprocessing unit, a detection unit and a data processing unit, wherein the preprocessing unit includes a filtering system and a drying system, wherein the filtering system includes a filtering housing 1, a filtering mechanism 2, a gas transmission pipe 3, a cleaning component 4 and a scraper mechanism 5, wherein the filtering mechanism 2 is rotatably arranged on the filtering housing 1, the gas transmission pipe 3 is fixedly arranged on both sides of the upper part of the filtering housing 1, a notch is provided in the lower part of the filtering housing 1 and a cleaning component 4 is fixedly arranged, the cleaning component 4 is symmetrically arranged with a scraper mechanism 5, and the filtering housing 1 is also symmetrically arranged with a spray washing pipe 6 and a drying pipe 7;

[0031] The cleaning assembly 4 includes a cleaning shell 41 and a rolling brush mechanism 42, wherein the cleaning shell 41 is fixedly connected to the filter shell 1, the filter shell 1 is connected to the cleaning shell 41 through the notch, the top and bottom of the cleaning shell 41 are symmetrically rotated with the filter mechanism 2 as the symmetry point, and the adjusting shaft 44 is fixedly arranged, the driving shaft 43 is driven by a motor 1, and a rolling brush mechanism 42 is arranged between the driving shaft 43 and the adjusting shaft 44;

[0032] The roller brush mechanism 42 includes a sleeve 421 and a cleaning brush 422, wherein the cleaning brush 422 is fixedly arranged on the outer side of the sleeve 421 in a circumferential manner, a plurality of slots 423 are vertically opened on the top of the sleeve 421, and an annular groove 424 is obliquely opened on the bottom of the sleeve 421;

[0033] A plurality of latches 431 are fixedly disposed on the driving shaft 43, and the latches 431 are latched into the latch slots 423 and slide along the latch slots 423;

[0034] A guide block 441 is fixedly disposed on the adjusting shaft 44, the adjusting shaft 44 is rotatably connected to the sleeve 421, and the guide block 441 is inserted into the annular groove 424 and slides along the annular groove 424;

[0035] The filter mechanism 2 includes a filter seat 21 and a filter screen 22, wherein the filter seat 21 is rotatably disposed in the filter housing 1, an annular filter screen 22 is fixedly disposed on the filter seat 21, and the filter screen 22 contacts the roller brush mechanism 42 through the notch;

[0036] In addition, the power for the filter seat 21 to rotate along the filter housing 1 comes from an external driving mechanism, such as a gear ring mechanism and a worm gear mechanism;

[0037] It should be noted that the roller brush mechanism 42, the spray pipe 6 and the drying pipe 7 are each provided in two pieces and are symmetrically distributed along the filter mechanism 2, so that both sides of the filter screen 22 can be effectively cleaned, further improving the cleaning effect of the filter screen 22;

[0038] The scraper mechanism 5 includes a rotating shaft 51 and an arc-shaped plate 52, wherein the rotating shaft 51 is rotatably arranged on the cleaning shell 41 and driven by the second motor, four arc-shaped plates 52 are fixedly arranged on the rotating shaft 51 in a circumferential manner, and a plurality of tooth grooves 53 are formed at the output end of the arc-shaped plate 52, and the cleaning brush 422 can pass through the tooth grooves 53;

[0039] A plurality of tooth plates 411 having the same shape and size as the tooth grooves 53 are fixedly arranged on one side of the cleaning shell 41 close to the scraper mechanism 5, and a cleaning block 412 is slidably arranged on the cleaning shell 41, and the cleaning block 412 is arc-shaped and can fit with the inner wall of the arc-shaped plate 52, and a sewage box 413 is symmetrically slidably arranged at the bottom of the cleaning shell 41, and a vertical plate is fixedly arranged in the sewage box 413, and the vertical plate can fit with the lower bottom surface of the cleaning block 412.

[0040] During implementation, the collected gas sample is transported to the filter housing 1 through the gas pipe 3, and the gas sample is filtered by the filter mechanism 2 to remove particulate matter and oil mist in the gas sample. At the same time, the filter mechanism 2 is driven to rotate so that the filter screen 22 within the range of the gas pipe 3 is always replaced, thereby ensuring that the filter screen 22 always maintains an efficient filtering state. Subsequently, the filter screen 22 is cleaned by the cleaning component 4 during the rotation of the filter screen 22, that is, the roller brush mechanism 42 is driven to rotate by the drive shaft 43 so that the cleaning brush 422 moves along the filter screen 22. The surface of the filter 22 rotates, thereby brushing out the particles and oil mist on the filter 22, and before cleaning, the cleaning agent is sprayed on the surface of the filter 22 by the spray cleaning pipe 6 to further improve the cleaning effect of the filter 22. At the same time, when the drive shaft 43 drives the sleeve 421 to rotate, the guide block 441 can slide along the annular groove 424, thereby driving the sleeve 421 to slide up and down, and further driving the cleaning brush 422 to slide up and down along the surface of the filter 22, thereby ensuring that the cleaning brush 422 cleans the filter 22. The cleaning is performed in all directions. Subsequently, during the rotation of the roller brush mechanism 42, the cleaning brush 422 can further pass through the tooth groove 53, and under the action of the arc plate 52, the impurities and oil on the cleaning brush 422 are further scraped off, so that the cleaning brush 422 can be kept in a clean state, further improving the cleaning effect of the filter 22. Subsequently, the arc plate 52 is rotated and replaced, and the impurities and oil on the arc plate 52 are further scraped into the sewage box 413 through the cleaning block 412, and then the cleaned filter 22 is dried by the hot air introduced by the drying pipe 7. Dry treatment ensures that the filter 22 entering the gas pipe 3 remains clean and dry, thereby realizing automatic cleaning of the filter 22. There is no need to manually disassemble and clean the filter 22. It is only necessary to regularly clean the oil stains in the sewage box 413. The filtered gas is then passed into the drying system for drying treatment. After removing the moisture in the gas, the non-scattering infrared gas sensor in the detection unit is used to accurately detect the CO2 concentration in the gas. The data collected by the non-scattering infrared gas sensor is then processed, stored and transmitted by the data processing unit.

[0041] A method for detecting gas produced by CO2 oil recovery comprises the following steps:

[0042] S1. Filtering and drying the gas sample collected from the oil well through the filtering system and drying system in the pretreatment unit;

[0043] S2, the gas sample is transported to the filter housing 1 through the gas pipe 3 and filtered through the filter mechanism 2, and the filter mechanism 2 is driven to rotate, so that the filter screen 22 within the gas pipe 3 is always replaced, ensuring that the filter screen 22 always maintains an efficient filtering effect;

[0044] S2.1, using the spray pipe 6 to spray the cleaning agent onto the filter 22, and then using the cleaning component 4 to clean the filter 22, so as to clean the oil stains and impurities on the filter 22;

[0045] S2.2, the sleeve 421 is driven to rotate by the driving shaft 43 and the cleaning brush 422 is driven to rotate along the surface of the filter 22 to clean the filter 22. At the same time, the sleeve 421 slides up and down under the action of the adjusting shaft 44, so that the cleaning brush 422 slides up and down along the surface of the filter 22, thereby allowing the cleaning brush 422 to perform a full-scale cleaning of the filter 22. In the process of sliding up and down, the position of the cleaning brush 422 passing through the tooth socket 53 will also change accordingly, thereby preventing the cleaning brush 422 from rubbing against a certain position of the tooth socket 53 for a long time to cause wear, thereby effectively extending the service life of the cleaning brush 422;

[0046] S3, using the scraper mechanism 5 to clean the cleaning brush 422, and scraping the cleaned oil and waste into the sewage box 413 through the cleaning block 412. In addition, the top of the cleaning shell 41 is provided with a cavity for accommodating the cleaning block 412, so that the cleaning block 412 can be separated from the arc plate 52, ensuring that the scraper mechanism 5 can rotate normally, that is, completing the alternation and replacement of the arc plate 52;

[0047] S4. Pass the pretreated gas into the detection unit for detection, use the non-scattering infrared gas sensor to accurately detect the CO2 concentration in the gas, and process, store and transmit the data collected by the non-scattering infrared gas sensor through the data processing unit.

[0048] What has been described above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A CO2 oil recovery output gas detection device, characterized in that: The invention comprises a pre-processing unit, a detection unit and a data processing unit. The pre-processing unit comprises a filtering system and a drying system. The filtering system comprises a filtering housing (1), a filtering mechanism (2), an air supply pipe (3), a cleaning component (4) and a scraper mechanism (5). The filtering mechanism (2) is rotatably arranged on the filtering housing (1). The air supply pipe (3) is fixedly arranged on both sides of the upper part of the filtering housing (1). The lower part of the filtering housing (1) is provided with a notch and is fixedly provided with a cleaning component (4). The cleaning component (4) is symmetrically provided with a scraper mechanism (5). The filtering housing (1) is also symmetrically provided with a spray washing pipe (6) and a drying pipe (7).

2. A CO2 oil recovery output gas detection device according to claim 1, characterized in that: The cleaning assembly (4) comprises a cleaning shell (41) and a rolling brush mechanism (42), wherein the cleaning shell (41) is fixedly connected to the filter shell (1), the filter shell (1) is connected to the cleaning shell (41) through the notch, and the top and bottom of the cleaning shell (41) are symmetrically provided with a driving shaft (43) and a fixedly provided adjusting shaft (44) with the filter mechanism (2) as a symmetrical point, respectively, the driving shaft (43) being driven by a motor 1, and the rolling brush mechanism (42) is provided between the driving shaft (43) and the adjusting shaft (44).

3. A CO2 oil recovery output gas detection device according to claim 2, characterized in that: The rolling brush mechanism (42) comprises a sleeve (421) and a cleaning brush (422), wherein the cleaning brush (422) is fixedly arranged in a circumferential manner on the outer side of the sleeve (421), a plurality of slots (423) are vertically provided on the top of the sleeve (421), and an annular slot (424) is obliquely provided on the bottom of the sleeve (421).

4. A CO2 flooding oil production output gas detection device according to claim 3, characterized in that: A plurality of latching pins (431) are fixedly arranged on the driving shaft (43), and the latching pins (431) are latched into the latching slots (423) and slide along the latching slots (423); A guide block (441) is fixedly arranged on the adjustment shaft (44), the adjustment shaft (44) is rotatably connected to the sleeve (421), and the guide block (441) is inserted into the annular groove (424) and slides along the annular groove (424).

5. A CO2 oil recovery output gas detection device according to claim 3, characterized in that: The filter mechanism (2) comprises a filter seat (21) and a filter screen (22), wherein the filter seat (21) is rotatably arranged in the filter housing (1), an annular filter screen (22) is fixedly arranged on the filter seat (21), and the filter screen (22) is in contact with the roller brush mechanism (42) through the notch.

6. A CO2 flooding oil production output gas detection device according to claim 5, characterized in that: The scraper mechanism (5) comprises a rotating shaft (51) and an arc-shaped plate (52), wherein the rotating shaft (51) is rotatably arranged on the cleaning shell (41) and driven by a second motor, four arc-shaped plates (52) are fixedly arranged in a circle on the rotating shaft (51), and a plurality of tooth grooves (53) are formed at the output end of the arc-shaped plate (52), and the cleaning brush (422) can pass through the tooth grooves (53).

7. A CO2 flooding oil production output gas detection device according to claim 6, characterized in that: A plurality of tooth plates (411) having the same shape and size as the tooth sockets (53) are fixedly arranged on one side of the cleaning shell (41) close to the scraper mechanism (5), and a cleaning block (412) is slidably arranged on the cleaning shell (41), the cleaning block (412) being arc-shaped and being able to fit with the inner wall of the arc-shaped plate (52), and a sewage discharge box (413) is symmetrically slidably arranged on the bottom of the cleaning shell (41), and a vertical plate is fixedly arranged in the sewage discharge box (413), and the vertical plate is able to fit with the lower bottom surface of the cleaning block (412).

8. A method for detecting gas produced by CO2 flooding for oil production, which uses a device for detecting gas produced by CO2 flooding for oil production as claimed in claim 7, characterized in that: The steps include: S1. Filtering and drying the gas sample collected from the oil well through the filtering system and drying system in the pretreatment unit; S2, transporting the gas sample to the filter housing (1) through the gas pipe (3) and filtering the gas sample through the filter mechanism (2), while driving the filter mechanism (2) to rotate, so that the filter screen (22) within the gas pipe (3) is always replaced, ensuring that the filter screen (22) always maintains a high-efficiency filtering effect; S2.1, using the spray cleaning pipe (6) to spray a cleaning agent onto the filter screen (22), and then using the cleaning component (4) to clean the filter screen (22), thereby cleaning away oil stains and impurities on the filter screen (22); S2.2, the driving shaft (43) drives the sleeve (421) to rotate and drives the cleaning brush (422) to rotate along the surface of the filter screen (22) to clean the filter screen (22), and at the same time, the sleeve (421) slides up and down under the action of the adjustment shaft (44), so that the cleaning brush (422) slides up and down along the surface of the filter screen (22); S3, using the scraper mechanism (5) to clean the cleaning brush (422), and scraping the cleaned oil and waste into the sewage box (413) through the cleaning block (412); S4. Pass the pretreated gas into the detection unit for detection, use the non-scattering infrared gas sensor to accurately detect the CO2 concentration in the gas, and process, store and transmit the data collected by the non-scattering infrared gas sensor through the data processing unit.

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