Oil casing gas on-line monitoring device

Abstract

The utility model discloses an oil casing gas on-line monitoring device which comprises a gas processing unit and a gas detection unit, the gas processing unit comprises a pressure reducing valve, the output end of the pressure reducing valve is sequentially connected with an oil-water separator, a dust filtering device and a condenser, and the output end of the condenser is respectively provided with a drainage device and a double-channel flowmeter; and the gas detection unit comprises a gas detector connected with the output end of the dual-channel flowmeter. According to the oil casing gas on-line monitoring device, gas to be detected is subjected to oil-water separation through an oil-water separator, subjected to dust removal through a dust filtering device, cooled and dehumidified through a condenser and then enters a double-channel flowmeter to be quantified, and then the gas to be detected enters a gas detector 10 to be detected; the device has the characteristics of fast response time, high precision, long service life, wide gas detection range, strong anti-interference capability, real-time monitoring and the like, can adapt to different gas injection process application scenarios of an oil field, and can effectively monitor components and content of produced gas of a gas injection well of oil field air injection development.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the tertiary oil recovery technical field relates to the oil casing gas on -line monitoring devices. BACKGROUND

[0002] Air injection oil recovery technology is one of the important ways to improve oil recovery. Air drive not only has the mechanism of conventional gas drive enhanced oil recovery (EOR), but also has the advantages of sufficient gas source, low cost and oxidation heat effect, and is considered as an effective EOR method for unconventional reservoirs. At present, air injection development mainly includes high-pressure air injection development of thin oil, air foam drive development, heavy oil fire oil layer development and air heat mixed phase drive development. O2, CO, H2S, C x H y When the concentration of the produced gas reaches the critical value, it is easy to cause fire and explosion. Therefore, it is necessary to effectively monitor the produced gas of the gas injection well.

[0003] However, at present, because the composition of the produced gas is complex, there is no effective monitoring means for monitoring the composition and content of the produced gas of the air heat mixed phase drive gas injection well.

[0004] In view of the above situation, an oilfield casing gas on-line monitoring device is proposed to monitor the change of each component and content of the oilfield produced gas. INVENTION CONTENTS

[0005] The utility model discloses a kind of oil casing gas on-line monitoring devices, and the purification of the gas to be detected is carried out by impurity removal and water removal, which improves detection accuracy.

[0006] The technical scheme adopted by the utility model is that the oil casing gas on-line monitoring device includes gas processing unit and gas detection unit, and the gas processing unit includes pressure reducing valve, the output end of pressure reducing valve is sequentially connected with oil-water separator, dust filter device and condenser, and the output end of condenser is respectively provided with drainage device and double-channel flowmeter;The gas detection unit includes gas detector connected with the output end of double-channel flowmeter.

[0007] The utility model has the characteristics that:

[0008] The output end of drainage device is further provided with water release regulating valve, and the double-channel flowmeter includes first flowmeter and second flowmeter, the output end of condenser is connected with the input end of second flowmeter, and the output end of second flowmeter is respectively connected with the input end of first flowmeter and gas detector.

[0009] The gas detector includes first detector and second detector, the output end of second flowmeter is connected with the input end of first detector, and the output end of first detector is connected with the output end of second detector.

[0010] The control unit further comprises an RS485 concentrator, and the gas detection unit is connected with the RS485 concentrator in four-wire mode.

[0011] The pressure reducing valve, the oil-water separator, the dust filtering device, the condenser, the water drainage device, the double-channel flow meter and the gas detector are connected in parallel, and the PCL controller controls the operation of the pressure reducing valve, the oil-water separator, the dust filtering device, the condenser, the water drainage device, the double-channel flow meter and the gas detector respectively.

[0012] The control unit further comprises an RS485 concentrator, and the gas detection unit is connected with the RS485 concentrator in four-wire mode.

[0013] The dust filtering device comprises a cylinder body, an air inlet is arranged on the side wall of the cylinder body, a filter structure is arranged at the bottom of the cylinder body, an air outlet is further arranged at the bottom of the filter structure, the cylinder body and the filter structure are communicated, and the cylinder body and the filter structure are connected through threads.

[0014] A plurality of fins are arranged on the inner wall of the cylinder body in a staggered manner.

[0015] The filter structure comprises a connecting pipe, a filter frame is arranged at the bottom of the connecting pipe, a plurality of filter units are arranged in the filter frame, and the connecting pipe is communicated with the cylinder body and the filter frame.

[0016] A plurality of mounting holes are arranged on one side wall of the filter frame, the mounting holes are used in cooperation with the filter units, a plurality of fixing frames are arranged in the filter frame, the fixing frames are fixed to the inner wall of the filter frame, and the fixing frames are used in cooperation with the filter units.

[0017] The fixing frame is a U-shaped groove structure with a right angle at the bottom, and the bottom of the fixing frame is arranged opposite to the mounting hole.

[0018] Each filter unit is arranged in the corresponding fixing frame, and the filter unit comprises a filter plate, a push-pull cover is arranged on the side of the filter plate close to the mounting hole, the push-pull cover is used in cooperation with the mounting hole, and a handle is further arranged on the outer wall of the push-pull cover.

[0019] The oil casing gas on-line monitoring device is characterized in that: the to-be-detected gas is subjected to oil-water separation through the oil-water separator, dust removal treatment through the dust filtering device, and cooling and dehumidification through the condenser, and then enters the double-channel flow meter for quantization, and the to-be-detected gas enters the gas detector for detection. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1It is the structure diagram of oil casing gas on-line monitoring device Figure 1 ;

[0021] Figure 2 It is the structure diagram of oil casing gas on-line monitoring device Figure 2 ;

[0022] Figure 3 It is the circuit connection diagram of oil casing gas on-line monitoring device

[0023] Figure 4 It is the structure diagram of dust filtering device in the structure of oil casing gas on-line monitoring device

[0024] Figure 5 It is the sectional view of dust filtering device in the structure of oil casing gas on-line monitoring device

[0025] Figure 6 It is the structure diagram of filtering structure in dust filtering device in the structure of oil casing gas on-line monitoring device

[0026] Figure 7 It is the sectional view of filtering structure in dust filtering device in the structure of oil casing gas on-line monitoring device

[0027] Figure 8 It is the structure diagram of fixed frame structure in dust filtering device in the structure of oil casing gas on-line monitoring device

[0028] Wherein, 1. gas processing unit, 2. gas detection unit, 3. control unit, 4. pressure reducing valve, 5. oil-water separator, 6. dust filtering device, 7. condenser, 8. drainage device, 9. double-channel flowmeter, 10. gas detector, 11. PCL controller, 12. RS485 concentrator, 13. switching power supply;

[0029] 8-1. water drainage adjusting valve, 9-1. first flowmeter, 9-2. second flowmeter, 10-1. first detector, 10-2. second detector;

[0030] 6-1. cylinder, 6-2. filtering structure, 6-3. air inlet, 6-4. air outlet, 6-5. filtering unit, 6-6. fin, 6-7. connecting pipe, 6-8. filtering frame, 6-9. mounting port, 6-10. fixed frame, 6-11. push-pull cover, 6-12. filter plate, 6-13. handle. DETAILED DESCRIPTION

[0031] The utility model will be explained in detail below in combination with the drawings and specific embodiments.

[0032] The utility model discloses an oil casing gas on-line monitoring device, such as Figure 1As shown, including gas processing unit 1 and gas detection unit 2, gas processing unit 1 includes pressure reducing valve 4, the output end of pressure reducing valve 4 is connected to oil-water separator 5, dust removal device 6 and condenser 7 in turn, the output end of condenser 7 is provided with drainage device 8 and double-channel flow meter 9 respectively; gas detection unit 2 includes gas detector 10 connected with the output end of double-channel flow meter 9. Oil-water separator 5 is used for separating oil and water in the gas to be detected, S-101 type oil-water separator is used in the application, dust removal device 6 processes large particle impurities in the gas to be detected, condenser 7 belongs to cooling condenser, which cools and dehumidifies the gas to be detected, FNF-24.2 / 88 condenser is used in the application, the refrigeration part of FNF-24.2 / 88 condenser 7 uses semiconductor refrigerating sheet, which is high in efficiency and reliable in use, the heat dissipation mode is forced air cooling, condenser 7 integrates cooling device and gas-liquid separation device to separate water and condensate oil in the gas to be detected. Water and condensate oil in the gas to be detected are discharged through drainage device 8, drainage device 8 adopts peristaltic pump, which can only discharge water and cannot leak gas, through the regular work of peristaltic pump, the excess moisture in the gas path of the gas pretreatment system is discharged, avoiding the corrosion of moisture to metal devices such as sensor and the risk caused by condensate oil, drainage device 8 in the application is GY28-ANR type.

[0033] The output end of drainage device 8 is further provided with a water discharge adjusting valve 8-1, double-channel flow meter 9 includes first flow meter 9-1 and second flow meter 9-2, first flow meter 9-1 and second flow meter 9-2 are arranged in parallel, the output end of condenser 7 is connected with the input end of second flow meter 9-2, the output end of second flow meter 9-2 is connected with the input end of first flow meter 9-1 and gas detector 10 respectively, double-channel flow meter 9 in the application adopts LUGB type vortex double-channel flow meter. Gas detector 10 includes first detector 10-1 and second detector 10-2, first detector 10-1 and second detector 10-2 are arranged in parallel, the output end of second flow meter 9-2 is connected with the input end of first detector 10-1, the output end of first detector 10-1 is connected with the output end of second detector 10-2, first detector 10-1 in the application is carbon dioxide detector, second detector 10-2 is four-in-one gas detector, which analyzes gas components and content by using catalytic combustion type / high-precision PID photoion detection principle.

[0034] As Figure 2 and Figure 3As shown, the control unit 3 includes a switching power supply 13 and a PCL controller 11, which are connected in series between the gas detector 10, the first detector 10-1 and the second detector 10-2 are connected in parallel, the pressure reducing valve 4, the oil-water separator 5, the dust filtering device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9 and the gas detector 10 are connected in parallel, and the PCL controller 11 controls the operation of the pressure reducing valve 4, the oil-water separator 5, the dust filtering device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9 and the gas detector 10 respectively. The first flow meter 9-1 and the second flow meter 9-2 are connected in parallel. The control unit 3 further includes an RS485 concentrator 12, and the gas detection unit 2 is connected to the RS485 concentrator 12 in four-wire mode.

[0035] As shown in Figure 4 The dust filtering device 6 includes a cylinder body 6-1, an air inlet 6-3 is arranged on the side wall of the cylinder body 6-1, a filter structure 6-2 is arranged at the bottom of the cylinder body 6-1, an air outlet 6-4 is further arranged at the bottom of the filter structure 6-2, the cylinder body 6-1 is communicated with the filter structure 6-2, and the cylinder body 6-1 and the filter structure 6-2 are connected by threads. The gas to be detected passing through the oil-water separator 5 enters the dust filtering device 6 through the air inlet 6-3.

[0036] As shown in Figure 5 A plurality of fins 6-6 are arranged on the inner wall of the cylinder body 6-1 in a staggered manner.

[0037] As shown in Figure 6 The filter structure 6-2 includes a connecting pipe 6-7, the connecting pipe 6-7 is provided with a filter frame 6-8 at the bottom, a plurality of groups of filter units 6-5 are arranged inside the filter frame 6-8, and the connecting pipe 6-7 is communicated with the cylinder body 6-1 and the filter frame 6-8. The filter units 6-5 filter large-particle impurities in the gas to be detected. One side wall of the filter frame 6-8 is provided with a plurality of groups of mounting holes 6-9, the mounting holes 6-9 are used in cooperation with the filter units 6-5, a plurality of groups of fixing frames 6-10 are arranged inside the filter frame 6-8, the fixing frames 6-10 are fixed to the inner wall of the filter frame 6-8, and the fixing frames 6-10 are used in cooperation with the filter units 6-5. As shown in Figure 8 The fixing frame 6-10 is a U-shaped groove structure with a right angle at the bottom, and the fixing frame 6-10 is arranged opposite to the mounting hole 6-9. The fixing frame 6-10 is used for fixing the filter unit 6-5.

[0038] As shown in Figure 7 Each filter unit 6-5 is installed in the corresponding fixing frame 6-10 by a push-pull manner, and each filter unit 6-5 includes a filter plate 6-12, a push-pull cover 6-11 is arranged on one side of the filter plate 6-12 close to the mounting hole 6-9, the push-pull cover 6-11 is used in cooperation with the mounting hole 6-9, and a handle 6-13 is further arranged on the outer wall of the push-pull cover 6-11.

[0039] The following examples further illustrate the online gas monitoring device for oil casing of this invention:

[0040] Example 1:

[0041] Online gas monitoring device for oil casing, such as Figure 1 As shown, the system includes a gas processing unit 1 and a gas detection unit 2. The gas processing unit 1 includes a pressure reducing valve 4, the output of which is sequentially connected to an oil-water separator 5, a dust filter 6, and a condenser 7. The output of the condenser 7 is equipped with a drainage device 8 and a dual-channel flow meter 9. The gas detection unit 2 includes a gas detector 10 connected to the output of the dual-channel flow meter 9. When the pressure reducing valve 4 is opened, the high-temperature and high-pressure gas to be tested in the oil casing enters the oil-water separator 5. The oil-water separator 5 separates the oil and water in the gas to be tested. The separated gas to be tested then enters the dust filter 6 to treat large particulate impurities in the gas to be tested. The treated gas to be tested then enters the condenser 7. The condenser 7 is a cooling condenser that cools and dehumidifies the gas to be tested. The cooling part of the condenser 7 uses a semiconductor cooling chip, which is highly efficient and reliable. The heat dissipation method is forced air cooling. The condenser 7 integrates a cooling device and a gas-liquid separation device to remove water and condensate oil from the gas to be tested. The water and condensate oil in the gas to be tested are discharged through the drainage device 8. The drainage device 8 uses a peristaltic pump that can only drain water and cannot leak gas. The peristaltic pump works periodically to remove excess moisture in the gas path of the gas pretreatment system, avoiding the risk of moisture corrosion to metal devices such as sensors and condensate oil. The gas to be tested enters the dual-channel flow meter 9.

[0042] The output end of the drainage device 8 is also equipped with a drain regulating valve 8-1 to control the discharge of water and condensate oil produced by the condenser 7. The dual-channel flow meter 9 includes a first flow meter 9-1 and a second flow meter 9-2, which are connected in series. The output end of the condenser 7 is connected to the input end of the second flow meter 9-2, and the output end of the second flow meter 9-2 is connected to both the first flow meter 9-1 and the input end of the gas detector 10. The second flow meter 9-2 is a venting flow meter that discharges excess gas entering the first flow meter 9-1; the first flow meter 9-1 controls the flow rate of the gas to be detected sent to the gas detection unit 2.

[0043] Example 2:

[0044] Online gas monitoring device for oil casing, such as Figure 1As shown, the system includes a gas processing unit 1 and a gas detection unit 2. The gas processing unit 1 includes a pressure reducing valve 4, the output of which is sequentially connected to an oil-water separator 5, a dust filter 6, and a condenser 7. The output of the condenser 7 is equipped with a drainage device 8 and a dual-channel flow meter 9. The gas detection unit 2 includes a gas detector 10 connected to the output of the dual-channel flow meter 9. When the pressure reducing valve 4 is opened, the high-temperature and high-pressure gas to be tested in the oil casing enters the oil-water separator 5. The oil-water separator 5 separates the oil and water in the gas to be tested. The separated gas to be tested then enters the dust filter 6 to treat large particulate impurities in the gas to be tested. The treated gas to be tested then enters the condenser 7. The condenser 7 is a cooling condenser that cools and dehumidifies the gas to be tested. The cooling part of the condenser 7 uses a semiconductor cooling chip, which is highly efficient and reliable. The heat dissipation method is forced air cooling. The condenser 7 integrates a cooling device and a gas-liquid separation device to remove water and condensate oil from the gas to be tested. The water and condensate oil in the gas to be tested are discharged through the drainage device 8. The drainage device 8 uses a peristaltic pump that can only drain water and cannot leak gas. The peristaltic pump works periodically to remove excess moisture in the gas path of the gas pretreatment system, avoiding the risk of moisture corrosion to metal devices such as sensors and condensate oil. The gas to be tested enters the dual-channel flow meter 9.

[0045] The output end of the drainage device 8 is also equipped with a drain regulating valve 8-1 to control the discharge of water and condensate oil produced by the condenser 7. The dual-channel flow meter 9 includes a first flow meter 9-1 and a second flow meter 9-2, which are connected in series. The output end of the condenser 7 is connected to the input end of the second flow meter 9-2, and the output end of the second flow meter 9-2 is connected to both the first flow meter 9-1 and the input end of the gas detector 10. The second flow meter 9-2 is a venting flow meter that discharges excess gas entering the first flow meter 9-1; the first flow meter 9-1 controls the flow rate of the gas to be detected sent to the gas detection unit 2.

[0046] The gas detector 10 includes a first detector 10-1 and a second detector 10-2. The output terminal of the second flow meter 9-2 is connected to the input terminal of the first detector 10-1, and the output terminal of the first detector 10-1 is connected to the output terminal of the second detector 10-2. The first detector 10-1 is a GT-S400 carbon dioxide detector, and the second detector 10-2 is a GT-S400-B four-in-one gas detector, which uses the catalytic combustion / high-precision PID photoionization detection principle to analyze the gas composition and content.

[0047] Example 3:

[0048] Online gas monitoring device for oil casing, such as Figure 1As shown, including gas processing unit 1 and gas detection unit 2, gas processing unit 1 includes pressure reducing valve 4, the output end of pressure reducing valve 4 is connected to oil-water separator 5, dust removal device 6 and condenser 7 in turn, the output end of condenser 7 is provided with drainage device 8 and double-channel flow meter 9 respectively; Gas detector 10 is connected to the output end of double-channel flow meter 9. Open the pressure reducing valve 4, the high temperature and high pressure gas in the oil jacket pipe enters the oil-water separator 5, the oil and water in the gas to be detected are separated by the oil-water separator 5, the separated gas to be detected enters the dust removal device 6 to treat the large particle impurities in the gas to be detected, the treated gas to be detected enters the condenser 7, the condenser 7 belongs to the cooling condenser, the gas to be detected is cooled and dehumidified, the refrigeration part of condenser 7 uses semiconductor refrigerating sheet, which is high in efficiency and reliable in use, and the heat dissipation mode is forced air cooling. Condenser 7 integrates cooling device and gas-liquid separation device, water and condensate in the gas to be detected are separated out, and the water and condensate in the gas to be detected are discharged through drainage device 8, drainage device 8 adopts peristaltic pump, which can only discharge water and cannot leak gas, the peristaltic pump works regularly to discharge the excess moisture in the gas path of the gas pretreatment system, avoid the corrosion of moisture to the metal devices such as sensor and the risk caused by condensate, and the gas to be detected enters double-channel flow meter 9.

[0049] The output end of drainage device 8 is further provided with a water discharge adjusting valve 8-1 for controlling the discharge of water and condensate generated by condenser 7. Double-channel flow meter 9 includes first flow meter 9-1 and second flow meter 9-2, first flow meter 9-1 and second flow meter 9-2 are arranged in series, the output end of condenser 7 is connected to the input end of second flow meter 9-2, and the output end of second flow meter 9-2 is connected to the input end of first flow meter 9-1 and gas detector 10 respectively. Second flow meter 9-2 is an emptying flow meter, which discharges the excess gas into first flow meter 9-1; First flow meter 9-1 controls the flow of the gas to be detected into gas detection unit 2.

[0050] Gas detector 10 includes first detector 10-1 and second detector 10-2, the output end of second flow meter 9-2 is connected to the input end of first detector 10-1, and the output end of first detector 10-1 is connected to the output end of second detector 10-2. First detector 10-1 is a carbon dioxide detector, and second detector 10-2 is a four-in-one gas detector, which uses catalytic combustion / PID light ion detection principle to analyze the gas composition and content.

[0051] As shown in the figure, Figure 2 and Figure 3As shown, the system also includes a control unit 3, which comprises a switching power supply 13 and a PCL controller 11. The switching power supply 13, PCL controller 11, and gas detector 10 are connected in series, while the first detector 10-1 and the second detector 10-2 are connected in parallel. The pressure reducing valve 4, oil-water separator 5, dust filter 6, condenser 7, drainage device 8, dual-channel flow meter 9, and gas detector 10 are connected in parallel. The PCL controller 11 controls the operation of the pressure reducing valve 4, oil-water separator 5, dust filter 6, condenser 7, drainage device 8, dual-channel flow meter 9, and gas detector 10, respectively. The first flow meter 9-1 and the second flow meter 9-2 are connected in parallel. The control unit 3 also includes an RS485 hub 12, with the gas detection unit 2 connected to the RS485 hub 12 via a four-wire connection. Through programmable control by the PCL controller 11, detection data can be transmitted remotely via the RS485 hub 12 to a computer or connected to a DCS system.

[0052] Example 4:

[0053] Online gas monitoring device for oil casing, such as Figure 1 As shown, the system includes a gas processing unit 1 and a gas detection unit 2. The gas processing unit 1 includes a pressure reducing valve 4, the output of which is sequentially connected to an oil-water separator 5, a dust filter 6, and a condenser 7. The output of the condenser 7 is equipped with a drainage device 8 and a dual-channel flow meter 9. The gas detection unit 2 includes a gas detector 10 connected to the output of the dual-channel flow meter 9. When the pressure reducing valve 4 is opened, the high-temperature and high-pressure gas to be tested in the oil casing enters the oil-water separator 5. The oil-water separator 5 separates the oil and water in the gas to be tested. The separated gas to be tested then enters the dust filter 6 to treat large particulate impurities in the gas to be tested. The treated gas to be tested then enters the condenser 7. The condenser 7 is a cooling condenser that cools and dehumidifies the gas to be tested. The cooling part of the condenser 7 uses a semiconductor cooling chip, which is highly efficient and reliable. The heat dissipation method is forced air cooling. The condenser 7 integrates a cooling device and a gas-liquid separation device to remove water and condensate oil from the gas to be tested. The water and condensate oil in the gas to be tested are discharged through the drainage device 8. The drainage device 8 uses a peristaltic pump that can only drain water and cannot leak gas. The peristaltic pump works periodically to remove excess moisture in the gas path of the gas pretreatment system, avoiding the risk of moisture corrosion to metal devices such as sensors and condensate oil. The gas to be tested enters the dual-channel flow meter 9.

[0054] The output end of the drainage device 8 is further provided with a drainage adjusting valve 8-1 for controlling the drainage of water and condensate oil generated by the condenser 7. The double-channel flow meter 9 comprises a first flow meter 9-1 and a second flow meter 9-2, the first flow meter 9-1 and the second flow meter 9-2 are arranged in series, the output end of the condenser 7 is connected to the input end of the second flow meter 9-2, and the output end of the second flow meter 9-2 is connected to the input end of the first flow meter 9-1 and the gas detector 10 respectively. The second flow meter 9-2 is a vent flow meter, which drains the excess gas into the first flow meter 9-1; and the first flow meter 9-1 controls the flow of the gas to be detected into the gas detection unit 2.

[0055] The gas detector 10 comprises a first detector 10-1 and a second detector 10-2, the output end of the second flow meter 9-2 is connected to the input end of the first detector 10-1, and the output end of the first detector 10-1 is connected to the output end of the second detector 10-2. The first detector 10-1 is a carbon dioxide detector, and the second detector 10-2 is a four-in-one gas detector, which uses catalytic combustion / PID light ion detection principle to analyze the gas components and content.

[0056] As shown in Figure 2 and Figure 3 , the control unit 3 further comprises a switching power supply 13 and a PCL controller 11, the switching power supply 13, the PCL controller 11 and the gas detector 10 are arranged in series, and the first detector 10-1 and the second detector 10-2 are arranged in parallel; the pressure reducing valve 4, the oil-water separator 5, the dust removal device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9 and the gas detector 10 are arranged in parallel, and the PCL controller 11 controls the operation of the pressure reducing valve 4, the oil-water separator 5, the dust removal device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9 and the gas detector 10 respectively, and the first flow meter 9-1 and the second flow meter 9-2 are arranged in parallel; the control unit 3 further comprises an RS485 concentrator 12, and the gas detection unit 2 is connected to the RS485 concentrator 12 in four-wire system. The detection data can be transmitted to a computer or connected to a DCS system through the RS485 concentrator 12 for communication and remote transmission by programmable control of the PCL controller 11.

[0057] As shown in Figure 4As shown, the dust filtering device 6 includes a cylinder body 6-1, the cylinder body 6-1 is provided with an air inlet 6-3 on the side wall, the cylinder body 6-1 is provided with a filter structure 6-2 at the bottom, the filter structure 6-2 is further provided with an air outlet 6-4 at the bottom, the cylinder body 6-1 is communicated with the filter structure 6-2, and the cylinder body 6-1 is connected with the filter structure 6-2 through threads. The to-be-detected gas passing through the oil-water separator 5 enters the dust filtering device 6 through the air inlet 6-3, slows down in the cylinder body 6-1, and then enters the filter structure 6-2 to filter large-particle impurities, and the filtered to-be-detected gas enters the condenser 7 to be cooled.

[0058] Embodiment 5:

[0059] The oil-casing gas on-line monitoring device, such as Figure 1 As shown, includes a gas processing unit 1 and a gas detection unit 2, the gas processing unit 1 includes a pressure reducing valve 4, the output end of the pressure reducing valve 4 is connected with an oil-water separator 5, a dust filtering device 6 and a condenser 7 in sequence, and the output end of the condenser 7 is provided with a drainage device 8 and a double-channel flow meter 9; the gas detection unit 2 includes a gas detector 10 connected with the output end of the double-channel flow meter 9. Open the pressure reducing valve 4, the high-temperature and high-pressure to-be-detected gas in the oil casing enters the oil-water separator 5, separates the oil and water in the to-be-detected gas through the oil-water separator 5, the separated to-be-detected gas enters the dust filtering device 6 to treat large-particle impurities in the to-be-detected gas, the treated to-be-detected gas enters the condenser 7, the condenser 7 is a cooling condenser, which cools and dehumidifies the to-be-detected gas, the refrigeration part of the condenser 7 uses a semiconductor refrigerating sheet, which is high in efficiency and reliable in use, and the heat dissipation mode is forced air cooling. The condenser 7 integrates a cooling device and a gas-liquid separation device to separate water and condensate oil in the to-be-detected gas, the water and condensate oil in the to-be-detected gas are discharged through the drainage device 8, the drainage device 8 uses a peristaltic pump, which can only discharge water and cannot leak gas, the peristaltic pump is regularly operated to discharge excess moisture in the gas path of the gas pretreatment system, so as to avoid corrosion of the moisture to metal devices such as sensors and risks caused by condensate oil, and the to-be-detected gas enters the double-channel flow meter 9.

[0060] The output end of the drainage device 8 is further provided with a water discharge adjusting valve 8-1 to control the discharge of water and condensate oil generated by the condenser 7, the double-channel flow meter 9 includes a first flow meter 9-1 and a second flow meter 9-2, the first flow meter 9-1 and the second flow meter 9-2 are arranged in series, the output end of the condenser 7 is connected with the input end of the second flow meter 9-2, and the output end of the second flow meter 9-2 is connected with the input end of the first flow meter 9-1 and the gas detector 10 respectively. The second flow meter 9-2 is an emptying flow meter, which discharges excess gas into the first flow meter 9-1; the first flow meter 9-1 controls the flow of the to-be-detected gas sent into the gas detection unit 2.

[0061] The gas detector 10 comprises a first detector 10-1 and a second detector 10-2, the output end of the second flow meter 9-2 is connected with the input end of the first detector 10-1, and the output end of the first detector 10-1 is connected with the output end of the second detector 10-2. The first detector 10-1 is a carbon dioxide detector, and the second detector 10-2 is a four-in-one gas detector, which utilizes catalytic combustion / PID high-precision photoionization detection principle to analyze gas components and content.

[0062] As shown in Figure 2 and Figure 3 The control unit 3 further comprises an RS485 concentrator 12, and the gas detection unit 2 is connected with the RS485 concentrator 12 in four-wire system. The detection data can be communicated and transmitted remotely through the RS485 concentrator 12 and transmitted to a computer or connected with a DCS system through programmable control of the PCL controller 11.

[0063] As shown in Figure 4As shown, the dust filtering device 6 includes a cylinder body 6-1, the side wall of the cylinder body 6-1 is provided with an air inlet 6-3, the bottom of the cylinder body 6-1 is provided with a filter structure 6-2, the bottom of the filter structure 6-2 is further provided with an air outlet 6-4, the cylinder body 6-1 is in communication with the filter structure 6-2, and the cylinder body 6-1 and the filter structure 6-2 are connected through threads. The to-be-detected gas passing through the oil-water separator 5 enters the dust filtering device 6 through the air inlet 6-3, slows down in the cylinder body 6-1, and then enters the filter structure 6-2 to filter large-particle impurities, and the filtered to-be-detected gas enters the condenser 7 to be cooled. A plurality of fins 6-6 are arranged on the inner wall of the cylinder body 6-1 in a staggered manner, the plurality of fins 6-6 form a plurality of curved channels in the cylinder body 6-1, so that the to-be-detected gas slows down and slowly passes through the filter structure 6-2, thereby improving the filtering effect. The fins 6-6 are arranged in a ring shape around the inner wall of the cylinder body 6-1. The filter structure 6-2 includes a connecting pipe 6-7, the bottom of the connecting pipe 6-7 is provided with a filter frame 6-8, a plurality of groups of filter units 6-5 are arranged in the filter frame 6-8, and the connecting pipe 6-7 is in communication with the cylinder body 6-1 and the filter frame 6-8. The outer wall of the connecting pipe 6-7 is provided with external threads, the inner wall of the bottom of the cylinder body 6-1 is provided with internal threads, and the connecting pipe 6-7 and the cylinder body 6-1 are connected through threads. The filter unit 6-5 is used for filtering large-particle impurities in the to-be-detected gas.

[0064] Example 6:

[0065] The oil casing gas online monitoring device, such as Figure 1 As shown, includes a gas processing unit 1 and a gas detection unit 2, the gas processing unit 1 includes a pressure reducing valve 4, the output end of the pressure reducing valve 4 is connected to an oil-water separator 5, a dust filtering device 6 and a condenser 7 in sequence, and the output end of the condenser 7 is provided with a drainage device 8 and a double-channel flow meter 9; the gas detection unit 2 includes a gas detector 10 connected to the output end of the double-channel flow meter 9. Open the pressure reducing valve 4, the high temperature and high pressure to-be-detected gas in the oil casing enters the oil-water separator 5, separates the oil and water in the to-be-detected gas through the oil-water separator 5, the separated to-be-detected gas enters the dust filtering device 6 to process large-particle impurities in the to-be-detected gas, the processed to-be-detected gas enters the condenser 7, the condenser 7 is a cooling condenser, which cools and dehumidifies the to-be-detected gas, the refrigeration part of the condenser 7 adopts a semiconductor refrigerating sheet, which is high in efficiency and reliable in use, and the heat dissipation mode is forced air cooling. The condenser 7 integrates a cooling device and a gas-liquid separation device to separate water and condensate oil in the to-be-detected gas, the water and condensate oil in the to-be-detected gas are discharged through the drainage device 8, the drainage device 8 adopts a peristaltic pump, which can only discharge water and cannot leak gas, the peristaltic pump is regularly operated to discharge excess moisture in the gas path of the gas pretreatment system, thereby avoiding the corrosion of the moisture to metal devices such as sensors and the risk caused by condensate oil, and the to-be-detected gas enters the double-channel flow meter 9.

[0066] The output end of the drainage device 8 is further provided with a drainage adjusting valve 8-1 for controlling the drainage of water and condensate oil generated by the condenser 7. The double-channel flow meter 9 comprises a first flow meter 9-1 and a second flow meter 9-2, the first flow meter 9-1 and the second flow meter 9-2 are arranged in series, the output end of the condenser 7 is connected to the input end of the second flow meter 9-2, and the output end of the second flow meter 9-2 is connected to the input end of the first flow meter 9-1 and the gas detector 10 respectively. The second flow meter 9-2 is a vent flow meter, which drains the excess gas into the first flow meter 9-1; and the first flow meter 9-1 controls the flow of the gas to be detected into the gas detection unit 2.

[0067] The gas detector 10 comprises a first detector 10-1 and a second detector 10-2, the output end of the second flow meter 9-2 is connected to the input end of the first detector 10-1, and the output end of the first detector 10-1 is connected to the output end of the second detector 10-2. The first detector 10-1 is a carbon dioxide detector, and the second detector 10-2 is a four-in-one gas detector, which uses catalytic combustion / PID light ion detection principle to analyze the gas components and content.

[0068] As shown in Figure 2 and Figure 3 , the control unit 3 further comprises a switching power supply 13 and a PCL controller 11, the switching power supply 13, the PCL controller 11 and the gas detector 10 are arranged in series, and the first detector 10-1 and the second detector 10-2 are arranged in parallel; the pressure reducing valve 4, the oil-water separator 5, the dust removal device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9 and the gas detector 10 are arranged in parallel, and the PCL controller 11 controls the operation of the pressure reducing valve 4, the oil-water separator 5, the dust removal device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9 and the gas detector 10 respectively; the first flow meter 9-1 and the second flow meter 9-2 are arranged in parallel; the control unit 3 further comprises an RS485 concentrator 12, and the gas detection unit 2 is connected to the RS485 concentrator 12 in four-wire system. The detection data can be transmitted to a computer or connected to a DCS system through the RS485 concentrator 12 for communication and remote transmission by programmable control of the PCL controller 11.

[0069] As shown in Figure 4As shown, the dust filtering device 6 includes a cylinder body 6-1, the side wall of the cylinder body 6-1 is provided with an air inlet 6-3, the bottom of the cylinder body 6-1 is provided with a filter structure 6-2, the bottom of the filter structure 6-2 is further provided with an air outlet 6-4, the cylinder body 6-1 is in communication with the filter structure 6-2, and the cylinder body 6-1 and the filter structure 6-2 are connected through threads. The to-be-detected gas passing through the oil-water separator 5 enters the dust filtering device 6 through the air inlet 6-3, slows down in the cylinder body 6-1, and then enters the filter structure 6-2 to filter out large-particle impurities, and the filtered to-be-detected gas enters the condenser 7 to be cooled through the air outlet 6-4. A plurality of fins 6-6 are arranged on the inner wall of the cylinder body 6-1 in a staggered manner, the plurality of fins 6-6 form a plurality of curved channels in the cylinder body 6-1, so that the to-be-detected gas slows down and slowly passes through the filter structure 6-2, thereby improving the filtering effect. The fins 6-6 are arranged in a ring shape around the inner wall of the cylinder body 6-1. The filter structure 6-2 includes a connecting pipe 6-7, the bottom of the connecting pipe 6-7 is provided with a filter frame 6-8, a plurality of groups of filter units 6-5 are arranged in the filter frame 6-8, and the connecting pipe 6-7 is in communication with the cylinder body 6-1 and the filter frame 6-8. The outer wall of the connecting pipe 6-7 is provided with external threads, the inner wall of the bottom of the cylinder body 6-1 is provided with internal threads, and the connecting pipe 6-7 and the cylinder body 6-1 are connected through threads. The filter unit 6-5 is used for filtering large-particle impurities in the to-be-detected gas. As Figure 7 As shown, one side wall of the filter frame 6-8 is provided with a plurality of groups of mounting holes 6-9, the number of the mounting holes 6-9 is consistent with the number of the groups; a plurality of groups of fixing frames 6-10 are arranged in the filter frame 6-8, and the fixing frames 6-10 are fixed to the inner wall of the filter frame 6-8. The mounting hole 6-9 is a mounting hole of the filter unit 6-5, and the filter unit 6-5 enters the filter frame 6-8 through the mounting hole 6-9 in a push-pull manner. The fixing frame 6-10 is used for fixing the filter unit 6-5.

[0070] As shown, Figure 8 The fixing frame 6-10 is a U-shaped groove structure with a right angle at the bottom, and the bottom of the fixing frame 6-10 is arranged opposite to the mounting hole 6-9. The filter unit 6-5 is slidingly arranged in the fixing frame 6-10.

[0071] Example 7:

[0072] An oil sleeve gas online monitoring device, as Figure 1As shown, including gas processing unit 1 and gas detection unit 2, gas processing unit 1 includes pressure reducing valve 4, the output end of pressure reducing valve 4 is connected to oil-water separator 5, dust removal device 6 and condenser 7 in turn, the output end of condenser 7 is provided with drainage device 8 and double-channel flow meter 9 respectively; Gas detector 10 is connected to the output end of double-channel flow meter 9. Open the pressure reducing valve 4, the high temperature and high pressure gas in the oil jacket pipe enters the oil-water separator 5, the oil and water in the gas to be detected are separated by the oil-water separator 5, the separated gas to be detected enters the dust removal device 6 to treat the large particle impurities in the gas to be detected, the treated gas to be detected enters the condenser 7, the condenser 7 belongs to the cooling condenser, the gas to be detected is cooled and dehumidified, the refrigeration part of condenser 7 uses semiconductor refrigerating sheet, which is high in efficiency and reliable in use, and the heat dissipation mode is forced air cooling. Condenser 7 integrates cooling device and gas-liquid separation device, water and condensate in the gas to be detected are separated out, and the water and condensate in the gas to be detected are discharged through drainage device 8, drainage device 8 uses peristaltic pump, which can only discharge water and cannot leak gas, the peristaltic pump works regularly to discharge excess moisture in the gas path of the gas pretreatment system, avoid the corrosion of moisture to metal devices such as sensor and the risk caused by condensate, and the gas to be detected enters double-channel flow meter 9.

[0073] The output end of drainage device 8 is further provided with a water discharge adjusting valve 8-1 for controlling the discharge of water and condensate generated by condenser 7. Double-channel flow meter 9 includes first flow meter 9-1 and second flow meter 9-2, first flow meter 9-1 and second flow meter 9-2 are arranged in series, the output end of condenser 7 is connected to the input end of second flow meter 9-2, and the output end of second flow meter 9-2 is connected to the input end of first flow meter 9-1 and gas detector 10 respectively. Second flow meter 9-2 is an emptying flow meter, which discharges excess gas into first flow meter 9-1; First flow meter 9-1 controls the flow of gas to be detected into gas detection unit 2.

[0074] Gas detector 10 includes first detector 10-1 and second detector 10-2, the output end of second flow meter 9-2 is connected to the input end of first detector 10-1, and the output end of first detector 10-1 is connected to the output end of second detector 10-2. First detector 10-1 is a carbon dioxide detector, and second detector 10-2 is a four-in-one gas detector, which uses catalytic combustion / PID light ion detection principle to analyze gas components and content.

[0075] As shown in the figure, Figure 2 and Figure 3As shown, the control unit 3 includes a switching power supply 13 and a PCL controller 11, which are connected in series between the gas detector 10, the pressure reducing valve 4, the oil-water separator 5, the dust filtering device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9, and the PCL controller 11 controls the operation of the pressure reducing valve 4, the oil-water separator 5, the dust filtering device 6, the condenser 7, the drainage device 8, the double-channel flow meter 9, and the gas detector 10. The first flow meter 9-1 and the second flow meter 9-2 are connected in parallel. The control unit 3 further includes an RS485 concentrator 12, and the gas detection unit 2 is connected to the RS485 concentrator 12 in four-wire mode. The detection data can be transmitted to a computer or connected to a DCS system through the RS485 concentrator 12 and the PCL controller 11.

[0076] As shown in Figure 4 The dust filtering device 6 includes a cylinder 6-1, an air inlet 6-3 is arranged on the side wall of the cylinder 6-1, a filter structure 6-2 is arranged at the bottom of the cylinder 6-1, an air outlet 6-4 is further arranged at the bottom of the filter structure 6-2, the cylinder 6-1 and the filter structure 6-2 are connected in communication, and the cylinder 6-1 and the filter structure 6-2 are connected by threads. The gas to be detected that has passed through the oil-water separator 5 enters the dust filtering device 6 through the air inlet 6-3, slows down in the cylinder 6-1, and then enters the filter structure 6-2 for large-particle impurity filtering. The filtered gas to be detected enters the condenser 7 for cooling through the air outlet 6-4. Figure 5 As shown in Figure 6 The filter structure 6-2 includes a connecting pipe 6-7, a filter frame 6-8 is arranged at the bottom of the connecting pipe 6-7, a plurality of groups of filter units 6-5 are arranged inside the filter frame 6-8, and the connecting pipe 6-7 is in communication with the cylinder 6-1 and the filter frame 6-8. The outer wall of the connecting pipe 6-7 is provided with external threads, the inner wall of the bottom of the cylinder 6-1 is provided with internal threads, and the connecting pipe 6-7 and the cylinder 6-1 are connected by threads. The filter units 6-5 are used for filtering large-particle impurities in the gas to be detected.

[0077] As shown in Figure 7As shown, the filter frame 6-8 is provided with a plurality of groups of mounting holes 6-9 on one side wall, and the number of mounting holes 6-9 is consistent with the number; the filter frame 6-8 is provided with a plurality of groups of fixing frames 6-10 inside, and the fixing frames 6-10 are fixed on the inner wall of the filter frame 6-8. The mounting hole 6-9 is the mounting hole of the filter unit 6-5, and the filter unit 6-5 enters the filter frame 6-8 through the mounting hole 6-9 in a push-pull manner. The fixing frame 6-10 is used for fixing the filter unit 6-5.

[0078] As shown in the figure, Figure 8 The fixing frame 6-10 is a U-shaped groove structure with a right-angle bottom, and the bottom of the fixing frame 6-10 is arranged opposite to the mounting hole 6-9. The filter unit 6-5 is slidably arranged in the fixing frame 6-10. The filter unit 6-5 is installed in the fixing frame 6-10 in a push-pull manner, and the filter unit 6-5 includes a filter plate 6-12, and the filter plate 6-12 is provided with a push-pull cover 6-11 close to one side of the mounting hole 6-9. The push-pull cover 6-11 is used in cooperation with the mounting hole 6-9, and the outer wall of the push-pull cover 6-11 is further provided with a handle 6-13. The push-pull cover 6-11 is used for closing the mounting hole 6-9, and the handle 6-13 is convenient for pulling the push-pull cover 6-11 to drive the filter plate 6-12 to enter and exit the fixing frame 6-10.

[0079] The use method of the utility model: open pressure reducing valve 4, oil jacket pipe high temperature high pressure gas to be detected enters oil water separator 5, through oil water separator 5, oil water in the gas to be detected is separated, the gas to be detected after separation enters dust filter device 6 and processes large particle impurities in the gas to be detected, the gas to be detected after processing enters condenser 7, and condenser 7 separates water and condensate oil in the gas to be detected, and the water and condensate oil in the gas to be detected are discharged through drainage device 8, and the gas to be detected enters double-channel flowmeter 9 and is quantified, and the gas to be detected after quantification enters gas detector 10 and is analyzed.

Claims

1. An oil casing gas on-line monitoring device, characterized in that, The utility model provides a gas detection device, including gas processing unit (1) and gas detection unit (2), gas processing unit (1) includes pressure reducing valve (4), and the output of pressure reducing valve (4) is connected oil water separator (5), dust filter (6) and condenser (7) in proper order, and the output of condenser (7) is provided with drain device (8) and double channel flowmeter (9) respectively, and the output of double channel flowmeter (9) is connected with gas detector (10) of gas detection unit (2).

2. The oil casing gas on-line monitoring device according to claim 1, characterized in that, The output of drain device (8) is further provided with a drain valve (8-1), and the double channel flowmeter (9) comprises a first flowmeter (9-1) and a second flowmeter (9-2), the output of the second flowmeter (9-2) is connected with the input of the first flowmeter (9-1) and the gas detector (10).

3. The oil casing gas on-line monitoring device according to claim 2, characterized in that, The gas detector (10) comprises a first detector (10-1) and a second detector (10-2), the output of the second flowmeter (9-2) is connected with the input of the first detector (10-1), and the output of the first detector (10-1) is connected with the output of the second detector (10-2).

4. The oil casing gas on-line monitoring device according to claim 3, characterized in that, The utility model further comprises a control unit (3), the control unit (3) comprises a switching power supply (13) and a PCL controller (11), the switching power supply (13), the PCL controller (11) and the gas detector (10) are connected in series, and the first detector (10-1) and the second detector (10-2) are connected in parallel. The pressure reducing valve (4), the oil water separator (5), the dust filter (6), the condenser (7), the drain device (8), the double channel flowmeter (9) and the gas detector (10) are connected in parallel, and the PCL controller (11) controls the operation of the pressure reducing valve (4), the oil water separator (5), the dust filter (6), the condenser (7), the drain device (8), the double channel flowmeter (9) and the gas detector (10), and the first flowmeter (9-1) and the second flowmeter (9-2) are connected in parallel. The control unit (3) further comprises an RS485 concentrator (12), and the gas detection unit (2) is connected with the RS485 concentrator (12) in four-wire system.

5. The oil casing gas on-line monitoring device according to claim 4, characterized in that, The dust filter (6) comprises a cylinder (6-1), an air inlet (6-3) is arranged on the side wall of the cylinder (6-1), a filter structure (6-2) is arranged at the bottom of the cylinder (6-1), an air outlet (6-4) is further arranged at the bottom of the filter structure (6-2), the cylinder (6-1) is communicated with the filter structure (6-2), and the cylinder (6-1) and the filter structure (6-2) are connected through threads.

6. The oil casing gas on-line monitoring device according to claim 5, characterized in that, A plurality of fins (6-6) are arranged on the inner wall of the cylinder (6-1) in a staggered manner.

7. The oil casing gas on-line monitoring device according to claim 6, characterized in that, The filter structure (6-2) comprises a connecting pipe (6-7) provided with a filter frame (6-8) at the bottom, and a plurality of groups of filter units (6-5) are arranged in the filter frame (6-8), and the connecting pipe (6-7) is in communication with the cylinder (6-1) and the filter frame (6-8).

8. The oil casing gas on-line monitoring device according to claim 7, characterized in that, One side wall of the filter frame (6-8) is provided with a plurality of groups of mounting ports (6-9), the mounting ports (6-9) are used in cooperation with the filter units (6-5), a plurality of groups of fixing frames (6-10) are arranged in the filter frame (6-8), the fixing frames (6-10) are fixed to the inner wall of the filter frame (6-8), and the fixing frames (6-10) are used in cooperation with the filter units (6-5).

9. The on-line oil-casing gas monitoring device of claim 8, wherein, The fixing frame (6-10) is a U-shaped groove structure with a right angle at the bottom, and the bottom of the fixing frame (6-10) is opposite to the mounting port (6-9).

10. The on-line oil-casing gas monitoring device of claim 9, wherein, Each filter unit (6-5) is arranged in the corresponding fixing frame (6-10), the filter unit (6-5) comprises a filter plate (6-12), a push-pull cover (6-11) is arranged on one side of the filter plate (6-12) close to the mounting port (6-9), the push-pull cover (6-11) is used in cooperation with the mounting port (6-9), and a handle (6-13) is further arranged on the outer wall of the push-pull cover (6-11).

Images