A CO2 flooding oil production output gas detection device and method

Abstract

The present invention discloses a device and method for detecting gas produced in CO2 oil recovery, and relates to the technical field of gas detection in CO2 oil recovery. The device comprises a filter housing, a filter mechanism, an air pipe, a cleaning component and a scraper mechanism. The cleaning component comprises a cleaning housing and a roller brush mechanism. The roller brush mechanism comprises a sleeve and a cleaning brush. The filter can be cleaned autonomously by the cleaning component, and the filter does not need to be manually disassembled for cleaning. The filter mechanism is rotated to keep the filter in a good filtering state within the air pipe, and the filtering effect on the gas is effectively improved. The setting of the adjustment shaft enables the roller brush mechanism to slide up and down when rotating to clean the filter, and to clean the filter in all directions. The scraper mechanism can be used to further clean the roller brush mechanism, thereby ensuring the cleanliness of the cleaning brush and improving the cleaning effect of the cleaning brush on the filter.

Description

Technical Field

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

[0002] The CO2 flooding production gas detection device is a device used to monitor the gas components in the production wells in oil fields using CO2 flooding technology. It is conducive to timely detection and treatment of problems such as oil and gas crosstalk, 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. However, since gas samples are mixed with a large amount of particulate matter and oil mist, the filter is very likely to become clogged when filtering the gas, and the filter needs to be frequently cleaned. This is mainly done by manual disassembly and replacement of the filter, which is relatively 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 flooding oil production 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 objectives, 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 filter housing, a filtering mechanism, a gas pipe, a cleaning assembly and a scraper mechanism, wherein the filtering mechanism is rotatably arranged on the filter housing, gas pipes are fixedly arranged on both sides of the upper part of the filter housing, a notch is provided in the lower part of the filter housing and a cleaning assembly is fixedly arranged, a scraper mechanism is symmetrically arranged in the cleaning assembly, and a spray pipe and a drying pipe are also symmetrically arranged on the filter housing.

[0006] Preferably, the cleaning assembly 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, and the top and bottom of the cleaning shell are symmetrically rotated with the filter mechanism as the symmetry point and are respectively provided with a driving shaft and a fixed adjustment shaft, the driving shaft is driven by motor 1, and a roller brush mechanism is provided between the driving shaft and the adjustment shaft.

[0007] Preferably, the roller brush mechanism includes a sleeve and a cleaning brush, wherein the cleaning brush is fixedly provided on the outer side of the sleeve in a circumferential manner, 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 provided on the driving shaft, and the bayonet pins are engaged with the bayonet slots and slide along the bayonet slots;

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

[0010] Preferably, the filter mechanism includes a filter seat and a filter screen, wherein the filter seat is rotatably arranged in the filter housing, an annular filter screen is fixedly arranged on the filter seat, and the filter screen 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 with the same shape and size as the tooth sockets are fixedly provided on one side of the cleaning shell close to the scraper mechanism, and a cleaning block is slidably provided on the cleaning shell, and the cleaning block is arc-shaped and can fit with the inner wall of the arc-shaped plate. A sewage box is also symmetrically slidably provided on the bottom of the cleaning shell, and a vertical plate is fixedly provided 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 flooding oil production comprises the following steps:

[0014] S1. The gas sample collected from the oil well is filtered and dried through the filtration system and drying system in the pretreatment unit;

[0015] S2. The gas sample is transported to the filter housing through the gas pipe and filtered by the filter mechanism, while the filter mechanism is driven to rotate so that the filter within the gas pipe is constantly replaced, ensuring that the filter always maintains an efficient filtering effect;

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

[0017] S2.2. The drive shaft drives the sleeve to rotate and drive the cleaning brush to rotate along the surface of the filter to clean the filter. At the same time, the sleeve slides up and down under the action of the adjustment shaft, causing the cleaning brush to slide 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. The pretreated gas is passed into the detection unit for detection, the CO2 concentration in the gas is accurately detected using a non-scattering infrared gas sensor, and the data collected by the non-scattering infrared gas sensor is processed, stored and transmitted through the data processing unit.

[0020] Compared with the prior art, the present invention provides a device and method for detecting gas produced by CO2 flooding, which has the following beneficial effects:

[0021] The present invention can clean the filter screen automatically by setting a cleaning component, and there is no need to manually disassemble the filter screen for cleaning. 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 of the gas. In addition, by setting the adjusting shaft, the roller brush mechanism can slide up and down when rotating to clean the filter screen, thereby cleaning the filter screen in all directions. In addition, the scraper mechanism can further clean the roller brush mechanism 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 up and down sliding process, thereby avoiding the cleaning brush and the tooth socket from rubbing and wearing 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 Schematic diagram of the structure of the filtration system of the present invention;

[0024] Figure 3 Schematic diagram of the structure of the cleaning component of the present invention;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure at center A;

[0026] Figure 5 Schematic diagram of the structure of the roller brush mechanism of the present invention;

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

[0028] Figure 7 Schematic diagram of the structure of the scraper mechanism of the present invention;

[0029] In the figure: 1. filter housing; 2. filter mechanism; 21. filter seat; 22. filter screen; 3. air supply 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 pin; 44. adjusting shaft; 441. guide block; 5. scraper mechanism; 51. rotating shaft; 52. curved plate; 53. tooth slot; 6. spray pipe; 7. drying pipe. DETAILED DESCRIPTION

[0030] See also Figures 1 to 7 In an embodiment of the present invention, a CO2 flooding production gas detection device includes a preprocessing unit, a detection unit, and a data processing unit. The preprocessing unit includes a filtering system and a drying system. The filtering system includes a filter housing 1, a filtering mechanism 2, a gas pipeline 3, a cleaning component 4, and a scraper mechanism 5. The filtering mechanism 2 is rotatably arranged on the filter housing 1, and the gas pipeline 3 is fixedly arranged on both sides of the upper part of the filter housing 1. The lower part of the filter housing 1 has a notch and is fixedly provided with a cleaning component 4. The cleaning component 4 is symmetrically provided with a scraper mechanism 5. The filter housing 1 is also symmetrically provided with a spray pipe 6 and a drying pipe 7.

[0031] The cleaning assembly 4 includes a cleaning shell 41 and a roller brush mechanism 42, wherein the cleaning shell 41 is fixedly connected to the filter shell 1, and 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 symmetrical point, respectively, and a driving shaft 43 and an adjusting shaft 44 are fixedly provided. The driving shaft 43 is driven by a motor 1, and a roller brush mechanism 42 is provided 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 provided on the outer side of the sleeve 421 in a circumferential manner, a plurality of slots 423 are vertically provided on the top of the sleeve 421 , and an annular groove 424 is obliquely provided on the bottom of the sleeve 421 ;

[0033] A plurality of latches 431 are fixedly provided 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 provided on the adjusting shaft 44 , the adjusting shaft 44 is rotatably connected to the sleeve 421 , and the guide block 441 is engaged with 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, and 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 pairs and symmetrically distributed along the filter mechanism 2, so that both sides of the filter 22 can be effectively cleaned, further improving the cleaning effect of the filter 22;

[0038] The scraper mechanism 5 includes a rotating shaft 51 and an arc-shaped plate 52, wherein the rotating shaft 51 is rotatably mounted on the cleaning housing 41 and driven by the second motor. Four arc-shaped plates 52 are fixedly mounted on the rotating shaft 51 in a circumferential manner. The output ends of the arc-shaped plates 52 are provided with a plurality of grooves 53, through which the cleaning brush 422 can pass.

[0039] A plurality of tooth plates 411 having the same shape and size as the tooth grooves 53 are fixedly provided on one side of the cleaning shell 41 close to the scraper mechanism 5, and a cleaning block 412 is slidably provided on the cleaning shell 41. The cleaning block 412 is arc-shaped and can fit with the inner wall of the arc-shaped plate 52. A sewage box 413 is also symmetrically slidably provided on the bottom of the cleaning shell 41, and a vertical plate is fixedly provided 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 filter mechanism 2 is used to filter the gas sample 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 cleaning component 4 is used to clean the filter screen 22 during the rotation of the filter screen 22, that is, the driving shaft 43 is used to drive the roller brush mechanism 42 to rotate so that the cleaning brush 422 moves along the filter screen. 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, 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. All-round cleaning, then, 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 curved 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, and then the curved plate 52 is rotated and replaced, and the impurities and oil on the curved 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 flooding oil production comprises the following steps:

[0042] S1. The gas sample collected from the oil well is filtered and dried through the filtration system and drying system in the pretreatment unit;

[0043] S2, delivering 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 mesh 22 within the gas pipe 3 is constantly replaced, ensuring that the filter mesh 22 always maintains an efficient filtering effect;

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

[0045] S2.2. The drive shaft 43 drives the sleeve 421 to rotate and drives the cleaning brush 422 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 adjustment shaft 44, causing the cleaning brush 422 to slide up and down along the surface of the filter 22, thereby allowing the cleaning brush 422 to clean the filter 22 in all directions. In the process of sliding up and down, the position where the cleaning brush 422 passes 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 and causing wear, thereby effectively extending the service life of the cleaning brush 422.

[0046] S3. Use the scraper mechanism 5 to clean the cleaning brush 422, and scrape 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 to accommodate the cleaning block 412, so that the cleaning block 412 can be separated from the curved plate 52, ensuring that the scraper mechanism 5 can rotate normally, that is, completing the alternation and replacement of the curved plate 52;

[0047] S4. The pretreated gas is passed into the detection unit for detection, the CO2 concentration in the gas is accurately detected using a non-scattering infrared gas sensor, and the data collected by the non-scattering infrared gas sensor is processed, stored and transmitted through a data processing unit.

[0048] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this 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 scope of protection of the present invention.

Claims

1. A CO2 flooding oil production 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 delivery 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 delivery 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 fixedly provided with a cleaning component (4). The scraper mechanism (5) is symmetrically arranged in the cleaning component (4). The filtering housing (1) is also symmetrically provided with a spraying pipe (6) and a drying pipe (7). The cleaning assembly (4) comprises a cleaning shell (41) and a roller brush mechanism (42). The cleaning shell (41) is fixedly connected to the filter shell (1). The filter shell (1) is connected to the cleaning shell (41) through a notch. The top and bottom of the cleaning shell (41) are symmetrically rotated with the filter mechanism (2) as a symmetrical point and are respectively provided with a driving shaft (43) and a fixedly provided with an adjusting shaft (44). The driving shaft (43) is driven by a motor. The roller brush mechanism (42) is provided between the driving shaft (43) and the adjusting shaft (44). The roller brush mechanism (42) includes a sleeve (421) and a cleaning brush (422). The cleaning brush (422) is fixedly arranged on the outer side of the sleeve (421) in a circular shape. A plurality of slots (423) are vertically provided on the top of the sleeve (421). An annular groove (424) is obliquely provided on the bottom of the sleeve (421). A plurality of latches (431) are fixedly provided on the driving shaft (43), and the latches (431) are latched into the latch grooves (423) and slide along the latch grooves (423); A guide block (441) is fixedly provided 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); The scraper mechanism (5) comprises a rotating shaft (51) and an arc-shaped plate (52); a plurality of tooth grooves (53) are provided at the output end of the arc-shaped plate (52); a plurality of tooth plates (411) having the same shape and size as the tooth grooves (53) are fixedly provided on one side of the cleaning shell (41) close to the scraper mechanism (5); and a cleaning block (412) is slidably provided on the cleaning shell (41); the cleaning block (412) is arc-shaped and can be fitted with the inner wall of the arc-shaped plate (52); 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 the cleaning brush (422) can pass through the tooth socket (53).

2. A CO2 flooding oil production output gas detection device according to claim 1, characterized in that: The filter mechanism (2) comprises a filter seat (21) and a filter screen (22). 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) contacts the roller brush mechanism (42) through a notch.

3. A CO2 flooding oil production output gas detection device according to claim 2, characterized in that: A sewage box (413) is symmetrically and slidably provided at the bottom of the cleaning shell (41), and a vertical plate is fixedly provided in the sewage box (413), and the vertical plate can be fitted with the lower bottom surface of the cleaning block (412).

4. A method for detecting gas produced by CO2 flooding for oil production, which uses a CO2 flooding for oil production gas detection device as claimed in claim 3, characterized in that: The steps include: S1. The gas sample collected from the oil well is filtered and dried through the filtration 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 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 constantly replaced, ensuring that the filter screen (22) always maintains a high-efficiency filtering effect; S2.

1. Use the spray pipe (6) to spray the cleaning agent onto the filter (22), and then use the cleaning component (4) to clean the filter (22) to remove the oil stains and impurities on the filter (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 (22) to clean the filter (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 (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. The pretreated gas is passed into the detection unit for detection, and the CO2 concentration in the gas is accurately detected using a non-scattering infrared gas sensor. The data collected by the non-scattering infrared gas sensor is processed, stored and transmitted through the data processing unit.

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