A device and method for testing oil displacement agent concentration for oil fields

Abstract

The invention relates to an oil displacement agent concentration testing device and method for oil fields, and to the technical field of oil displacement agent concentration testing; the device comprises an equipment box, an extraction probe, an impurity filter and a detector, wherein the impurity filter comprises an impurity filter cartridge and an ultrafiltration membrane disposed inside the impurity filter cartridge; the detector performs an oil displacement agent concentration test on a sample filtered by the impurity filter; the impurity filter in the invention enables the ultrafiltration membrane to be folded multiple times to perform multi-stage filtration on the sample, greatly improving the sample filtration effect, and the ultrafiltration membrane of the invention can be replaced by telescopic means, greatly improving the efficiency of ultrafiltration membrane replacement and avoiding the complicated operation of manual replacement; the used part of the telescopic ultrafiltration membrane can also be flushed to ensure the reuse of the ultrafiltration membrane, greatly reducing the frequency of ultrafiltration membrane replacement and effectively improving the service life of the ultrafiltration membrane.

Description

Technical Field

[0001] The invention relates to the technical field of oil displacement agent concentration testing, and in particular to an oil displacement agent concentration testing device and method for oil fields. Background Art

[0002] The oil displacement agent concentration test device for oil fields is a device used to measure the concentration of oil displacement agents in oil fields. Oil displacement agents are chemicals used to enhance crude oil recovery, usually injected into underground reservoirs to change the interaction between crude oil and rock, thereby promoting the flow and recovery of crude oil.

[0003] For example, a Chinese patent with announcement number CN214895210U discloses a device for detecting polyacrylamide concentration in oilfield wastewater, including a shell and a detector; a filtering unit and a quantitative unit are arranged in the shell, the quantitative unit includes a quantitative cylinder, an air pipe and a liquid outlet pipe, the two ends of the second pipeline are respectively connected to the filtering box and the quantitative cylinder, the upper end of the liquid outlet pipe is connected to the lower end of the quantitative cylinder, the lower end of the liquid outlet pipe is connected to the detector, the lower end of the air pipe is fixed on the quantitative cylinder, and a first solenoid valve and a second solenoid valve are respectively arranged on the second pipeline and the liquid outlet pipe; the impurity content in the sewage is reduced, and the detection accuracy of the polyacrylamide concentration is improved.

[0004] However, the above detection device still has some shortcomings in actual use:

[0005] 1. In the above-mentioned prior art, when extracting samples from inside the oil field, the samples can be quantitatively extracted, but the extracted samples are relatively single, and the products at different depths in the oil field are not extracted, resulting in the accidental nature of the test results, leading to the problem of inaccurate test results.

[0006] 2. Secondly, in the prior art, after the sample is extracted, it needs to be filtered, but the filtering equipment in the prior art is relatively simple, resulting in a large number of tiny impurities in the filtered sample, which can easily lead to large deviations in the sample detection results.

[0007] 3. In addition, after the sample is filtered, the existing filtering equipment needs to manually replace its internal core filtering components. Therefore, long-term use will cause blockage between its gaps, affecting its filtering effect.

[0008] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing detection devices. Summary of the invention

[0009] In order to solve the above problems, the present invention provides an oil field oil displacement agent concentration testing device and method, which adopts the following technical solutions:

[0010] In a first aspect, an oil field oil displacement agent concentration testing device includes a stationary equipment box;

[0011] An extraction probe is provided with an inner cavity and a plurality of through holes opened on the side wall of the extraction probe and communicating with the inner cavity, and the extraction probe is hung on the side wall of the equipment box;

[0012] An impurity filter, the impurity filter comprises an impurity filter cartridge and an ultrafiltration membrane disposed inside the impurity filter cartridge, the impurity filter cartridge is installed in an equipment box, a filter cavity is provided inside the impurity filter cartridge, the ultrafiltration membrane is disposed inside the impurity filter cartridge, and the ultrafiltration membrane is distributed in a stacked structure;

[0013] The detector tests the sample after being filtered by the impurity filter and detects the concentration of the oil displacement agent in the sample.

[0014] Preferably, the extraction probe is further provided with an extraction part for extracting samples at different depths in the oil well of the oil field, the extraction part comprises an extraction column sliding in the through hole of the extraction probe, and the two ends of the extraction column are staggeredly provided with oil inlets that are interconnected, the oil inlet of the extraction column located on one side of the extraction probe is connected to a collection bin through a pipeline, and an oil pump for discharging oil outward is provided in the collection bin;

[0015] A reset tension spring is connected between the side of the extraction column close to the extraction probe and the inner wall of the extraction probe.

[0016] Preferably, an extraction motor is also installed inside the extraction probe, and the output end of the extraction motor is upward and connected to a control screw that controls the movement of the extraction probe. A diamond-shaped control plate is screwed onto the control screw, and the control plate has an inclined structure around it, and the extraction column rests on the inclined surface of the control plate.

[0017] Preferably, a plurality of filter plates are arranged at equal intervals along the height direction inside the impurity filter, each filter plate is provided with strip grooves along the length direction, and the ultrafiltration membranes are stacked end to end along the strip grooves of the filter plates, and the extracted samples are filtered for impurities through the multi-layer ultrafiltration membranes.

[0018] Preferably, both ends of the ultrafiltration membrane roll are respectively passed through the impurity filter cylinder and the equipment box and extend outward, and both ends of the ultrafiltration membrane roll are wrapped around the retracting roller, the retracting roller is rotatably arranged on the outer wall of the equipment box, and a servo motor is provided on the retracting roller.

[0019] Preferably, a working chamber is provided in the filter clamp plate, and a plurality of auxiliary rotating disks are rotatably connected to the working chamber of the filter clamp plate at equal intervals, a vibration rod is provided on the auxiliary rotating disk, and an auxiliary spring is provided between the vibration rod and the auxiliary rotating disk;

[0020] The vibrating rod slides through the filter clamp and contacts the ultrafiltration membrane, and a vibrating circular hole is provided on the ultrafiltration membrane for the vibrating rod to slide. A circulation column No. 1 is provided in the vibrating circular hole of the ultrafiltration membrane, and the circulation column No. 1 contacts the eight-shaped slide groove provided on the vibrating rod.

[0021] Preferably, a plurality of auxiliary turntables in the filter clamp are connected with synchronous belts, a coaxial column is commonly installed on the auxiliary turntables on one side of the plurality of filter clamps, and a driving motor is installed on the coaxial column.

[0022] Preferably, a circle of mounting frame is further provided on the inner wall of the impurity filter cylinder, and a limit plate is clamped on the mounting frame, and the limit plate rests on the ultrafiltration membrane roll laid flat on the top filter clamping plate in the impurity filter cylinder.

[0023] Preferably, a supporting cap is also installed on the equipment box for supporting the extraction probe, and an extraction port corresponding to a plurality of collection bins inside the extraction probe is opened at the bottom of the extraction probe, and a plurality of extraction tubes corresponding to the extraction port are installed on the supporting cap, and one end of the extraction tube away from the extraction probe extends along the equipment box to the impurity filter cylinder at its upper end.

[0024] In the second aspect, a method for testing the concentration of an oil displacement agent for an oil field is provided, as follows:

[0025] S1: Preparation: Check the equipment and ensure that the extraction probe is clean and convenient for collecting samples;

[0026] S2: Sample collection: The extraction probe is lowered into the oil field, and then the extraction probe extracts oil at different depths in the oil field as samples;

[0027] S3: Sample filtration: After the sample is collected, it is put into the impurity filter and filtered multiple times through the ultrafiltration membrane in the impurity filter;

[0028] S4: Sample testing: After the sample is filtered, it is tested to detect the concentration of the oil displacement agent in the sample.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The present invention can extract oil from different depths in the oil field through the extraction probe, and the extracted oil can be directly transported from the extraction probe to the impurity filter cartridge in the equipment box for oil displacement agent concentration testing in turn. It can not only extract samples from multiple areas in the oil field, but also extract samples from different depths in the oil field.

[0031] 2. The impurity filter in the present invention can make the ultrafiltration membrane fold multiple times to perform multi-stage filtration on the sample, which greatly improves the effect of sample filtration. In addition, the ultrafiltration membrane of the present application can be replaced by telescopic means, which greatly improves the efficiency of ultrafiltration membrane replacement and avoids the complicated operation of manual replacement.

[0032] 3. The treatment part of the present invention can flush the used part of the telescopic ultrafiltration membrane, ensure the reuse of the ultrafiltration membrane, greatly reduce the frequency of ultrafiltration membrane replacement, and effectively increase the service life of the ultrafiltration membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Figure 1 It is a schematic diagram of the first perspective structure of the main body of the present invention.

[0035] Figure 2 It is a second perspective structural schematic diagram of the main body of the present invention.

[0036] Figure 3 It is a schematic diagram of the structure between the extraction probe and the extraction part of the present invention.

[0037] Figure 4 It is a structural schematic diagram of the extraction part of the present invention.

[0038] Figure 5 It is a schematic diagram of the structure between the impurity filter and the processing element of the present invention.

[0039] Figure 6 It is a schematic diagram of the structure between the filter clamping plate and the strip groove of the present invention.

[0040] Figure 7 It is a schematic diagram of the structure among the coaxial column, the driving motor and the filtering clamping plate of the present invention.

[0041] Figure 8 It is a schematic diagram of the structure between the auxiliary turntable and the vibration rod of the present invention.

[0042] Fig. 9 The present invention Figure 8 A partial enlarged view of point A in the figure.

[0043] Fig.10 It is a schematic structural diagram of the processing element of the present invention from a first viewing angle.

[0044] Fig.11 It is a schematic structural diagram of the processing element of the present invention from a second viewing angle.

[0045] Fig.12 The present invention is a flow chart of a method for testing the concentration of an oil displacement agent for an oil field.

[0046] Description of reference numerals: 1. Equipment box; 2. Extraction probe; 20. Through hole; 3. Impurity filter; 30. Ultrafiltration membrane roll; 37. Impurity filter cartridge; 4. Detector; 5. Extraction part; 50. Extraction column; 51. Oil inlet; 52. Collection bin; 53. Reset spring; 54. Extraction motor; 55. Control screw; 56. Control board; 31. Filter clamp; 32. Strip groove; 33. Retracting roller; 34. Servo motor; 6. Processing unit; 60. Limit frame; 61. Limit roller; 62. Connecting plate; 63. Electric push rod; 64. Flushing nozzle; 65. Control clamp; 66. Control compression spring; 67. Linkage block; 70. Auxiliary turntable; 71. Vibrating rod; 72. Auxiliary spring; 73. Vibrating circular hole; 74. No. 1 circulation column; 75. Synchronous belt; 76. Coaxial column; 77. Driving motor; 35. Mounting frame; 36. Limit plate; 21. Supporting cap; 22. Extraction port; 23. Extraction tube. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-Figure 12 This application is described in further detail.

[0048] The embodiment of the present application discloses an oil field oil displacement agent concentration testing device and method, which is mainly used in the treatment process before oil field exploitation to improve oil well production capacity and increase oil field exploitation rate through oil displacement agent.

[0049] In the above-mentioned prior art, when extracting samples from inside the oil field, the extracted samples are relatively single, and products at different depths in the oil field are not extracted, resulting in randomness in the test results and inaccurate test results.

[0050] Secondly, in the prior art, after the sample is extracted, it needs to be filtered, but the filtering equipment in the prior art is relatively simple, resulting in a large number of tiny impurities in the filtered sample, which can easily lead to large deviations in the sample detection results.

[0051] In addition, after the sample is filtered, the existing filtering equipment needs to be manually replaced with its internal core filtering components. Therefore, long-term use will cause blockage between its gaps, affecting its filtering effect. Embodiment 1:

[0052] Reference Figure 1 and Figure 2As shown, it is a specific structural schematic diagram of the oil-displacing agent concentration testing device for oil fields in the present application, which includes a stationary equipment box 1. The bottom of the equipment box 1 is provided with moving wheels to facilitate the movement of the entire equipment. When testing the oil-displacing agent concentration in the oil field, the equipment box 1 can directly test the extracted samples without sealing the extracted samples and then transferring them to the testing agency for testing. It can greatly improve the efficiency of the oil-displacing agent concentration test while ensuring the test accuracy.

[0053] The extraction probe 2 is provided with an inner cavity and a plurality of through holes 20 opened on the side wall of the extraction probe 2 and connected with the inner cavity. The extraction probe 2 is hung on the side wall of the equipment box 1; and a supporting cap 21 is provided at the bottom of the extraction probe 2 to ensure the stability of the extraction probe 2.

[0054] When it is necessary to extract samples in the oil field, the extraction probe 2 is connected to the existing known oil production equipment in the oil field, and then the extraction probe 2 is extended into the deep of the oil field through the existing equipment, and the sample is extracted through the extraction probe 2.

[0055] After the sample is extracted, it is filtered through the impurity filter 3, which includes an impurity filter cartridge 37 and an ultrafiltration membrane 30 arranged inside the impurity filter cartridge 37. The impurity filter cartridge 37 is installed in the equipment box 1, and a filter cavity is provided in the impurity filter cartridge 37. The ultrafiltration membrane 30 is arranged in the impurity filter cartridge 37, and the ultrafiltration membrane 30 is distributed in a stacked structure.

[0056] The impurity filter 3 mainly utilizes the ultrafiltration membrane 30 to filter the impurities in the sample, and the ultrafiltration membrane 30 is initially rolled up and laid in the impurity filter 3, so that the sample can be obtained after the impurities are removed after passing through the stacked ultrafiltration membranes 30.

[0057] The sample after impurities are removed is then tested by the detector 4, and the concentration of the oil displacement agent in the sample is finally detected, and the test data is recorded in detail.

[0058] The detector 4 tests the sample filtered by the impurity filter 3 and detects the concentration of the oil displacement agent in the sample.

[0059] Reference Figure 2 and Figure 3 As shown, it is a schematic diagram of the specific structure of the extraction probe 2 in the present application for extracting oil from the oil field; specifically, the extraction probe 2 is also provided with an extraction part 5 for extracting samples at different depths in the oil field and oil wells, and the extraction part 5 includes an extraction column 50 sliding in the through hole 20 of the extraction probe 2, and the two ends of the extraction column 50 are staggered with oil inlets 51 that are interconnected, and the oil inlet 51 of the extraction column 50 located on one side of the extraction probe 2 is connected to a collection bin 52 through a pipeline, and an oil pump for discharging oil outwards is provided in the collection bin 52.

[0060] A reset spring 53 is connected between the side of the extraction column 50 close to the extraction probe 2 and the inner wall of the extraction probe 2 .

[0061] In the initial state, the extraction column 50 is blocked in the through hole 20 of the extraction probe 2 , so that the through hole 20 is blocked, thereby preventing external dust from entering the interior of the extraction probe 2 .

[0062] In the initial state, the control plate 56 is located at the bottom of the control screw 55 .

[0063] When it is necessary to extract oil, the extraction probe 2 is extended into the oil field, and the extraction motor 54 is started by an external controller, and the extraction motor 54 drives the control screw 55 to rotate, and then the control board 56 on the control screw 55 moves from bottom to top along the control screw 55. In this process, the inclined surface of the control board 56 first squeezes the extraction column 50 on one side, so that the extraction column 50 extends outward along the through hole 20 of the extraction probe 2, and the oil inlet 51 on the extraction column 50 is exposed. Under the strong pressure inside the oil field, the oil enters the collection bin 52 through the pipeline along the oil inlet 51 of the extraction column 50 for collection.

[0064] After the control board 56 moves upward and exceeds the position of the first extraction column 50, the first extraction column 50 returns to its initial position driven by the reset spring 53 and stops collecting samples; when the control board 56 moves to the position of the second extraction column 50, the above operation is repeated to extend the second extraction column 50 and collect the oil; and after multiple collection bins 52 have collected samples, the extraction probe 2 can be taken out to complete the sample collection.

[0065] It should be noted that a plurality of extraction columns 50 are provided on the extraction probe 2, and the plurality of extraction columns 50 are staggered to collect samples, in order to avoid fluctuation of oil due to oil collection between the extraction columns 50, thereby avoiding the fluctuation affecting the concentration of the subsequently collected samples.

[0066] See also Figure 3 and Figure 4 As shown, an extraction motor 54 is also installed inside the extraction probe 2. The output end of the extraction motor 54 is upward and connected to a control screw 55 for controlling the movement of the extraction probe 2. A diamond-shaped control board 56 is screwed on the control screw 55. The control board 56 is surrounded by an inclined structure, and the extraction column 50 rests on the inclined surface of the control board 56.

[0067] It should be noted that the positions of the multiple extraction columns 50 on the extraction probe 2 are all different, so oil samples at different positions and depths in the oil field can be collected.

[0068] The control panel 56 has a diamond-shaped structure.

[0069] After the oil sample is extracted, the surface of the extraction probe 2 is rinsed clean, and then the extraction probe 2 is inserted into the supporting cap 21 of the equipment box 1, so that the extraction tube 23 on the supporting cap 21 is inserted into the extraction port 22 of the extraction probe 2, and samples are extracted from the multiple collection chambers 52 inside the extraction probe 2.

[0070] Replay Figure 3 As shown, specifically, a supporting cap 21 is installed on the equipment box 1 for supporting the extraction probe 2. An extraction port 22 corresponding to a plurality of collection bins 52 inside the extraction probe 2 is provided at the bottom thereof. A plurality of extraction tubes 23 corresponding to the extraction port 22 are installed on the supporting cap 21. One end of the extraction tube 23 away from the extraction probe 2 extends along the equipment box 1 to the impurity filter cylinder 37 at its upper end.

[0071] It should be noted that a plurality of extraction columns 50 are provided in the extraction probe 2 , and therefore there are a plurality of corresponding collection chambers 52 . The extraction ports 22 at the bottom of each extraction probe 2 correspond one by one to a separate collection chamber 52 , and the extraction tubes 23 also correspond one by one to the extraction tubes 23 in the extraction probe 2 .

[0072] Therefore, when the extraction probe 2 is against the support cap 21, each collection chamber 52 can extract samples through a single extraction tube 23, avoiding confusion between samples. This ensures the isolation between samples, provides multiple groups of experimental objects for subsequent testing, ensures the accuracy of the test results, and avoids accidental test results.

[0073] After the extraction probe 2 extracts the sample and reinstalls it on the equipment box 1, the impurity filter 3 can filter the sample one by one. Figure 3 As shown, it is a schematic diagram of the structure of the impurity filter 3 filtering the sample; a plurality of filter clamps 31 are arranged at equal intervals along the height direction inside the impurity filter 3, and each filter clamp 31 is provided with a strip groove 32 along the length direction. The ultrafiltration membranes 30 are sequentially arranged end to end along the strip grooves 32 of the filter clamps 31 in a stacked state, and the extracted sample is filtered for impurities through the multi-layer ultrafiltration membranes 30.

[0074] It should be noted that the top layer of the ultrafiltration membrane 30 is used to filter larger solid impurities, so that granular impurities or iron filings are screened out by the ultrafiltration membrane 30 on the top layer of the entire impurity filter cylinder 37, and the subsequent multi-layer ultrafiltration membrane 30 filters some fine impurities or molten impurities multiple times until the cleanliness of the sample reaches the specified standard.

[0075] See also Figure 5As shown, the two ends of the ultrafiltration membrane roll 30 are respectively passed through the impurity filter cylinder 37 and the equipment box 1 and extend outward, and the two ends of the ultrafiltration membrane roll 30 are wrapped around the retracting roller 33, and the retracting roller 33 is rotatably arranged on the outer wall of the equipment box 1, and a servo motor 34 is provided on the retracting roller 33.

[0076] It should be noted that a plurality of leakage ports are provided on the filter clamp plate 31 to facilitate the layer-by-layer filtration of the oil; and the ultrafiltration membrane 30 passes through the strip grooves 32 of the plurality of filter clamp plates 31 from top to bottom in sequence, so that the ultrafiltration membrane 30 is in a wavy stacked state, so that the ultrafiltration membrane 30 has a multi-layer structure, which can realize layer-by-layer filtration of the sample.

[0077] It should also be noted that when the filtering performance of the portion of the ultrafiltration membrane 30 set on the filter clamp plate 31 is significantly reduced due to long-term work, the servo motor 34 can be started, and the ultrafiltration membrane 30 can be pulled to move by the servo motor 34, so that the blocked portion of the entire ultrafiltration membrane 30 is moved from the filter clamp plate 31, and the unused portion with intact functions and strong performance will be re-laid on several filter clamp plates 31, so that the sample can continue to be filtered.

[0078] Similarly, when dirt appears on the surface of the impurity filter cartridge 37 of the impurity filter 3 after long-term use, the impurity filter cartridge 37 and the ultrafiltration membrane 30 can be directly flushed.

[0079] After the multiple overlapping ultrafiltration membranes 30 filter the sample, the sample is filtered from top to bottom by the ultrafiltration membrane 30 due to its own gravity. However, in order to further improve the filtration efficiency and avoid the accumulation of impurities in the sample, the present application also proposes a vibrating rod 71, which vibrates the ultrafiltration membrane 30 to ensure that the sample on the upper end of the ultrafiltration membrane 30 can be evenly spread out to avoid the sample being too inefficient during the filtration process.

[0080] Look again Figure 5 As shown, a circle of mounting frame 35 is also provided on the inner wall of the impurity filter cylinder 37 , and a limit plate 36 is clamped on the mounting frame 35 , and the limit plate 36 abuts against the ultrafiltration membrane 30 laid flat on the top filter clamping plate 31 in the impurity filter cylinder 37 .

[0081] The function of the limiting plate 36 is to limit the solid impurities to prevent them from moving into the filter membrane at the lower end of the impurity filter cylinder 37. After a certain amount of solid impurities are accumulated on the ultrafiltration membrane 30 laid flat on the filter clamping plate 31 at the upper end of the impurity filter cylinder 37, they can be uniformly processed.

[0082] See also Figure 6 , Figure 7 and Figure 8As shown, a working chamber is provided in the filter clamp plate 31 , and a plurality of auxiliary turntables 70 are rotatably connected to the working chamber of the filter clamp plate 31 at equal intervals. A vibration rod 71 is provided on the auxiliary turntable 70 , and an auxiliary spring 72 is provided between the vibration rod 71 and the auxiliary turntable 70 .

[0083] The vibrating rod 71 slides through the filter clamping plate 31 and abuts against the ultrafiltration membrane 30, and a vibration circular hole 73 is provided on the ultrafiltration membrane 30 for the vibrating rod 71 to slide. A circulation column 74 is provided in the vibration circular hole 73 of the ultrafiltration membrane 30, and the circulation column 74 abuts against the eight-shaped slide groove provided on the vibrating rod 71.

[0084] A synchronous belt 75 is connected to the auxiliary turntables 70 in the filter clamp plate 31 , and a coaxial column 76 is commonly installed on the auxiliary turntables 70 on one side of the filter clamp plates 31 , and a driving motor 77 is installed on the coaxial column 76 on one side.

[0085] During the specific implementation, the driving motor 77 is started, and the driving motor 77 drives the auxiliary turntable 70 on one side to rotate through the coaxial column 76, and then the auxiliary turntable 70 on one side drives multiple auxiliary turntables 70 to rotate under the drive of the synchronous belt 75. At this time, the multiple auxiliary turntables 70 drive the vibrating rod 71 to rotate at a uniform speed during the rotation, and the surface of the vibrating rod 71 is provided with an eight-shaped slide groove. With the cooperation of the eight-shaped slide groove and the No. 1 circulation column 74, the driving vibrating rod 71 can also move back and forth up and down. At this time, the vibrating rod 71 will squeeze the ultrafiltration membrane 30 that is against it, so that the ultrafiltration membrane 30 can rise and fall. At this time, the sample on the ultrafiltration membrane 30 can flow quickly, and the sample can be filtered during the flow. Embodiment 2:

[0086] Reference Fig. 9 As shown, on the basis of Example 1, in order to further improve the service life of the ultrafiltration membrane 30, ensure the performance of the ultrafiltration membrane 30, and ensure that the ultrafiltration membrane 30 can always be maintained in the best state, the present application also proposes a processing component 6, through which the used ultrafiltration membrane 30 can be cleaned to facilitate its reuse.

[0087] First, the ultrafiltration membrane roll 30 of the present application is in a roll shape, and the ultrafiltration membrane roll 30 is relatively long, and only a small section of it needs to be used each time. Therefore, by using it in sections, it can be ensured that it can be used for a longer time. However, the service life of the ultrafiltration membrane roll 30 is relatively long. After long-term use, only the pores therein are blocked. After being unblocked, its optimal performance can be restored.

[0088] In the conventional technology, the ultrafiltration membrane 30 is removed by disassembling and then cleaned. After it reaches the reasonable usage standard, it can be reinstalled on the equipment for use. However, the present application can automatically clean the ultrafiltration membrane 30, and it cannot be manually disassembled and cleaned. The equipment can automatically clean it through the processing part 6 to ensure the reuse of the ultrafiltration membrane 30.

[0089] The details are as follows:

[0090] See also Fig. 9 , Fig.10 and Fig.11 As shown, the portion of the ultrafiltration membrane roll 30 located between the equipment box 1 and the impurity filter cartridge 37 is also provided with a processing component 6, which includes two groups of symmetrically distributed limit frames 60, and two groups of symmetrical limit rollers 61 are provided in the two limit frames 60. A connecting plate 62 is connected to the same side of the two groups of limit rollers 61, and an electric push rod 63 is installed on the connecting plate 62. The electric push rod 63 is arranged inside the equipment box 1.

[0091] A flushing nozzle 64 is also provided inside the equipment box 1, and the flushing nozzle 64 is covered with a plurality of control splints 65 corresponding to it and controlling the water spraying of the flushing nozzle 64. One side of the control splint 65 is hinged on the inner wall of the equipment box 1, and a control compression spring 66 is connected between the other side of the control splint 65 and the inner wall of the equipment box 1. A linkage block 67 is connected to the output end of the electric push rod 63, and the inclined surface of the linkage block 67 is in contact with the control splint 65.

[0092] It should be noted that, in the initial state, the two sets of limiting rollers 61 in the processing part 6 are relatively abutted, and the ultrafiltration membrane 30 passes through the two sets of limiting rollers 61, so that the ultrafiltration membrane 30 is limited by the limiting rollers 61. Firstly, it can avoid the ultrafiltration membrane 30 from wrinkling when it is wound onto the retracting roller 33. Secondly, it can also clamp the ultrafiltration membrane 30 so that the ultrafiltration membrane 30 can be cleaned stably, avoiding the vibration of the ultrafiltration membrane 30 caused by cleaning, which may cause the ultrafiltration membrane 30 that is filtering on the filter clamping plate 31 to be displaced.

[0093] Furthermore, the flushing nozzle 64 is of a known structure, and a control clamp 65 is abutted against the upper end to prevent the flushing nozzle 64 from accidentally spraying out water for cleaning the ultrafiltration membrane 30 .

[0094] In specific implementation, when the ultrafiltration membrane 30 needs to be rinsed, the used part of the ultrafiltration membrane 30 is stretched between the two sets of limiting rollers 61, and the electric push rod 63 is started. The output end of the electric push rod 63 pushes the connecting plate 62 upward to move upward. At this time, the connecting plate 62 drives the same side of the two sets of limiting rollers 61 to be lifted upward at the same time, so that the two sets of limiting rollers 61 and the part of the ultrafiltration membrane 30 clamped in the limiting rollers 61 are in an inclined state.

[0095] At the same time, when the output end of the electric push rod 63 moves upward, the linkage block 67 on the output end of the electric push rod 63 squeezes the control clamp plate 65, so that the control clamp plate 65 rotates around the hinge point, so that the control clamp plate 65 is away from one end of the flushing nozzle 64. At this time, the flushing nozzle 64 is opened, and a large amount of water can be sprayed outward. The water source contacts the ultrafiltration membrane 30, and the water source is sprayed upward from the bottom of the ultrafiltration membrane 30 to flush out the impurities adsorbed on the ultrafiltration membrane 30. Then the flushed impurities slide along the surface of the ultrafiltration membrane 30 to a unified collection point for collection.

[0096] See also Fig.12 A method for testing the concentration of oil displacement agent for oil fields is shown below:

[0097] S1: Preparation: Check the equipment and ensure that the extraction probe 2 is completely clean to facilitate sample collection;

[0098] S2: Sample collection: When it is necessary to extract oil, the extraction probe 2 is extended into the oil field, and the extraction motor 54 is started by an external controller, and the extraction motor 54 drives the control screw 55 to rotate, and then the control board 56 on the control screw 55 moves from bottom to top along the control screw 55. In this process, the inclined surface of the control board 56 first squeezes the extraction column 50 on one side, so that the extraction column 50 extends outward along the through hole 20 of the extraction probe 2, and the oil inlet 51 on the extraction column 50 is exposed. Under the strong pressure inside the oil field, the oil enters the collection bin 52 through the pipeline along the oil inlet 51 of the extraction column 50 for collection.

[0099] S3: Sample filtration: After the extraction probe 2 extracts the sample and is reinstalled on the equipment box 1, the impurity filter 3 can filter the sample one by one, placing the sample in the impurity filter cylinder 37 in turn, and filtering it through the ultrafiltration membrane 30 in the impurity filter cylinder 37.

[0100] After the multiple overlapping ultrafiltration membranes 30 filter the sample, the sample is filtered from top to bottom by the ultrafiltration membrane 30 due to its own gravity. However, in order to further improve the filtration efficiency and avoid the accumulation of impurities in the sample, the present application also proposes a vibrating rod 71, which vibrates the ultrafiltration membrane 30 to ensure that the sample on the upper end of the ultrafiltration membrane 30 can be evenly spread out to avoid the sample being too inefficient during the filtration process.

[0101] When the ultrafiltration membrane 30 needs to be rinsed, the used part of the ultrafiltration membrane 30 is stretched between the two sets of limiting rollers 61. At this time, the electric push rod 63 is started, and the output end of the electric push rod 63 pushes the connecting plate 62 upward to move upward. At this time, the connecting plate 62 drives the same side of the two sets of limiting rollers 61 to be lifted upward at the same time, so that the two sets of limiting rollers 61 and the part of the ultrafiltration membrane 30 clamped in the limiting rollers 61 are in an inclined state.

[0102] At the same time, when the output end of the electric push rod 63 moves upward, the linkage block 67 on the output end of the electric push rod 63 squeezes the control clamp plate 65, so that the control clamp plate 65 rotates around the hinge point, so that the control clamp plate 65 is away from one end of the flushing nozzle 64. At this time, the flushing nozzle 64 is opened, and a large amount of water can be sprayed outward. The water source contacts the ultrafiltration membrane 30, and the water source is sprayed upward from the bottom of the ultrafiltration membrane 30 to flush out the impurities adsorbed on the ultrafiltration membrane 30. Then the flushed impurities slide along the surface of the ultrafiltration membrane 30 to a unified collection point for collection.

[0103] S4: Sample testing: After the sample is filtered, it is tested to detect the concentration of the oil displacement agent in the sample.

[0104] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil displacement agent concentration testing device for oil fields, characterized in that: It includes a stationary equipment box (1); An extraction probe (2) is provided with an inner cavity and a plurality of through holes (20) opened on a side wall of the extraction probe (2) and communicating with the inner cavity, wherein the extraction probe (2) is hung on a side wall of the equipment box (1); An impurity filter (3), the impurity filter (3) comprising an impurity filter cartridge (37) and an ultrafiltration membrane roll (30) arranged inside the impurity filter cartridge (37), the impurity filter cartridge (37) being installed in the equipment box (1), and a filter cavity being provided in the impurity filter cartridge (37), the ultrafiltration membrane roll (30) being arranged in the impurity filter cartridge (37), and the ultrafiltration membrane roll (30) being distributed in a stacked structure; A detector (4) tests the sample after being filtered by the impurity filter (3) and detects the concentration of the oil displacement agent in the sample; The extraction probe (2) is also provided with an extraction part (5) for extracting samples at different depths in an oil well of an oil field. The extraction part (5) comprises an extraction column (50) sliding in a through hole (20) of the extraction probe (2). Both ends of the extraction column (50) are provided with mutually communicating oil inlets (51) at different positions. The oil inlet (51) of the extraction column (50) located on one side of the extraction probe (2) is connected to a collection bin (52) via a pipeline. An oil pump for discharging oil outwards is provided in the collection bin (52); A reset tension spring (53) is connected between the side of the extraction column (50) close to the extraction probe (2) and the inner wall of the extraction probe (2); An extraction motor (54) is also installed inside the extraction probe (2). The output end of the extraction motor (54) is upwardly directed and connected to a control screw (55) for controlling the movement of the extraction probe (2). A diamond-shaped control plate (56) is screwed onto the control screw (55). The control plate (56) is surrounded by an inclined surface structure. The extraction column (50) abuts against the inclined surface of the control plate (56). The interior of the impurity filter (3) is provided with a plurality of filter clamps (31) at equal intervals along the height direction, and each filter clamp (31) is provided with a strip groove (32) along the length direction. The ultrafiltration membrane rolls (30) are sequentially arranged end to end along the strip grooves (32) of the filter clamps (31) to form a stacked shape, and the extracted sample is filtered for impurities through the multi-layer ultrafiltration membrane rolls (30).

2. The oil field displacement agent concentration testing device according to claim 1, characterized in that: The two ends of the ultrafiltration membrane roll (30) are respectively penetrated by the impurity filter cartridge (37) and the equipment box (1) and extend outward, and the two ends of the ultrafiltration membrane roll (30) are wound on a retractable roller (33), the retractable roller (33) is rotatably arranged on the outer wall of the equipment box (1), and a servo motor (34) is provided on the retractable roller (33).

3. The oil field oil displacement agent concentration testing device according to claim 1, characterized in that: A working chamber is provided in the filtering clamping plate (31), a plurality of auxiliary rotating disks (70) are rotatably connected to the working chamber of the filtering clamping plate (31) at equal intervals, a vibration rod (71) is provided on the auxiliary rotating disk (70), and an auxiliary spring (72) is provided between the vibration rod (71) and the auxiliary rotating disk (70); The vibrating rod (71) slides through the filter clamping plate (31) and contacts the ultrafiltration membrane roll (30), and a vibrating circular hole (73) is provided on the ultrafiltration membrane roll (30) for the vibrating rod (71) to slide. A first circulation column (74) is provided in the vibrating circular hole (73) of the ultrafiltration membrane roll (30), and the first circulation column (74) contacts the eight-shaped sliding groove provided on the vibrating rod (71).

4. The oil field oil displacement agent concentration testing device according to claim 3, characterized in that: A synchronous belt (75) is connected to the plurality of auxiliary turntables (70) in the filter clamping plate (31), and a coaxial column (76) is commonly installed on the auxiliary turntables (70) on one side of the plurality of filter clamping plates (31), and a driving motor (77) is installed on the coaxial column (76).

5. The oil field oil displacement agent concentration testing device according to claim 1, characterized in that: A mounting frame (35) is also provided on the inner wall of the impurity filter cylinder (37), and a limit plate (36) is clamped on the mounting frame (35). The limit plate (36) abuts against the ultrafiltration membrane roll (30) laid flat on the top filter clamping plate (31) inside the impurity filter cylinder (37).

6. The oil field displacement agent concentration testing device according to claim 1, characterized in that: The equipment box (1) is also provided with a supporting cap (21) for supporting the extraction probe (2); the bottom of the extraction probe (2) is provided with an extraction port (22) corresponding to a plurality of collection bins (52) therein; the supporting cap (21) is provided with a plurality of extraction tubes (23) corresponding to the extraction ports (22); the ends of the extraction tubes (23) away from the extraction probe (2) extend along the equipment box (1) to the impurity filter cartridge (37) at the upper end thereof.

7. A method for testing the concentration of an oil-displacing agent for oil fields, using a device for testing the concentration of an oil-displacing agent for oil fields as claimed in any one of claims 1 to 6, characterized in that: The test method for oil displacement agent concentration in oil fields is as follows: S1: Preparation: Check the equipment and ensure that the extraction probe (2) is cleaned to facilitate sample collection; S2: Sample collection: the extraction probe (2) is lowered into the oil field, and then the extraction probe (2) extracts oil at different depths in the oil field as samples; S3: Sample filtration: After the sample is collected, it is placed in the impurity filter (3) and filtered multiple times by the ultrafiltration membrane (30) in the impurity filter (3); S4: Sample testing: After the sample is filtered, it is tested to detect the concentration of the oil displacement agent in the sample.

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