High-pressure dehydration system after pressurization and compression of vent gas of oil and gas well

Abstract

The utility model discloses a high-pressure dehydration system for pressurized and compressed vent gas of an oil and gas well, which belongs to the technical field of dehydration and comprises a first filter, a suction and dehydration multi-zone turntable, a second filter, a controller and a dehydration unit. A plurality of transverse chambers are arranged in the water absorption and dehydration multi-zone turntable; the water absorption and dehydration multi-area turntable comprises a first area and a second area; the first filter is connected with the left ends of the plurality of transverse chambers in the first area; the second filter is connected with the right ends of the plurality of transverse chambers located in the first area; one end of the dehydration unit is connected with the right ends of the one or more transverse chambers located in the second area, and the other end of the dehydration unit is connected with the desorption gas outlets of the one or more transverse chambers located in the second area; the controller is respectively connected with the first filter, the suction and dehydration multi-zone turntable, the second filter and the dehydration unit. Water absorption and dehydration integration is achieved through the water absorption and dehydration partition rotary table, and high failure rate caused by frequent switching of multiple valves is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of dehydration technology, and specifically relates to a high-pressure dehydration system after air release and pressurization in oil and gas wells. Background Technology

[0002] In oil drilling, with increasing environmental awareness, the control of venting volume after oil and gas well extraction is becoming increasingly stringent. This is especially true for oil and gas wells in remote areas, where the inability to lay pipelines in a timely manner or at all results in the venting of large amounts of natural gas, causing significant waste and environmental pollution. To reduce excessive natural gas venting and environmental pollution, while adhering to the principles of resource conservation and meeting the needs of efficient gas field development, the demand for rational and efficient natural gas venting collection technologies and equipment is particularly urgent.

[0003] Currently, the collection of vented natural gas from oil and gas wells mainly adopts the method of compression and subsequent collection and transportation. The natural gas or associated gas extracted from the wellhead is filtered through sand and water removal before being connected to the collection equipment for collection and transportation. Because the equipment is mainly used for on-site natural gas collection operations at gas wells, it generally adopts an integrated, mobile skid-mounted form. The equipment for natural gas compression is mostly composed of a dedicated natural gas compressor and its supporting components.

[0004] When compressed natural gas is used as fuel, it must be depressurized from high pressure to atmospheric or negative pressure before being mixed with air and burned. Due to the throttling effect during depressurization, the gas temperature will drop below -30°C. To prevent the formation of hydrates and freezing at such low temperatures after throttling, the raw natural gas must be deeply dehydrated.

[0005] Patent (Publication No. CN209483325U) discloses a skid-mounted associated gas recovery and utilization system for condensate gas fields, including an inlet separator, an inlet buffer tank, an exhaust buffer tank, a compressor air cooler, a compression cylinder, and a return tank. The inlet separator is connected to the inlet buffer tank and the return tank via pipelines, and the inlet buffer tank and the exhaust buffer tank are connected in series. The compression cylinder is mounted on the connecting pipeline between the inlet buffer tank and the exhaust buffer tank. The exhaust separator is connected to the return tank via a pipeline, the exhaust buffer tank is connected to the compressor air cooler via a pipeline, and the compressor air cooler is connected to the exhaust separator via a pipeline. This system features a compact structure and simple operation, and is suitable for associated gas recovery in processing stations during the pilot production phase of condensate gas fields. The system uses compression technology as the main process for natural gas recovery, but does not address the further processing of the compressed natural gas.

[0006] In actual production, low-pressure dehydration devices, i.e., pre-dehydration processes, are generally used to improve the gas production efficiency of compressors. However, this process is easily affected by the natural gas's quality; if the water content of the incoming gas is unstable, it will affect the dehydration effect. Furthermore, since natural gas sometimes carries impurities after compression, it affects the quality of the output gas. In actual production, gas-liquid separators are also used to dehydrate compressed natural gas, but the dehydration efficiency is low and does not achieve deep dehydration. Moreover, existing dehydration devices are only suitable for dehydration operations under normal or low pressure conditions; the equipment is large and occupies a lot of space, making it unsuitable for small skid-mounted structures; multi-tower backup methods involve complex pipeline connections and frequent valve switching, leading to a high failure rate of the dehydration devices; and the heat and cold sources within the device are not fully utilized, resulting in low energy efficiency. Therefore, there is an urgent need to develop a new high-pressure dehydration system. Utility Model Content

[0007] To address the aforementioned problems, this utility model discloses a high-pressure dehydration system for oil and gas wells after air release and pressurization, comprising: a first filter, a multi-zone rotary table for suction and dehydration, a second filter, a controller, and a dehydration unit;

[0008] The multi-zone dehydration turntable is provided with multiple transverse chambers inside; the multi-zone dehydration turntable includes a first zone and a second zone;

[0009] The first filter is connected to the left end of a plurality of transverse chambers located in the first region;

[0010] The second filter is connected to the right end of a plurality of transverse chambers located in the first region;

[0011] One end of the dehydration unit is connected to the right end of one or more transverse chambers located in the second region, and the other end is connected to the desorption gas outlet of one or more transverse chambers located in the second region.

[0012] The controller is connected to the first filter, the multi-zone dehydration turntable, the second filter, and the dehydration unit, respectively.

[0013] The transverse chamber is filled with molecular sieves;

[0014] The dehydration multi-zone turntable is cylindrical in shape and has a circular longitudinal section.

[0015] The longitudinal section of the transverse chamber is fan-shaped.

[0016] Furthermore, the dehydration unit includes an electric heater, a Roots circulating fan, a cooler, and a separator;

[0017] The electric heater, Roots circulating fan, separator and cooler are connected in sequence;

[0018] The top of the electric heater is connected to the right end of one or more transverse chambers located in the second region;

[0019] The cooler inlet is connected to the desorption gas outlet of one or more transverse chambers located in the second region.

[0020] Furthermore, the dehydration unit also includes a tubular heat exchanger;

[0021] The first inlet of the tubular heat exchanger is connected to the desorbed gas outlet of one or more transverse chambers located in the second region, and the first outlet is connected to the cooler.

[0022] The second inlet of the tubular heat exchanger is connected to the separator, and the second outlet is connected to the Roots circulation fan.

[0023] Furthermore, the dehydration unit also includes: a heating gas control valve and a desorption gas control valve;

[0024] One end of the heating gas control valve is connected to the electric heater, and the other end is connected to the right end of one or more transverse chambers located in the second region;

[0025] One end of the desorption gas control valve is connected to the desorption gas outlet of one or more transverse chambers located in the second region, and the other end is connected to the tubular heat exchanger.

[0026] The heating gas control valve and the desorption gas control valve are respectively connected to the controller.

[0027] Furthermore, the dehydration unit also includes: a second temperature sensor, a safety valve, and a drain valve;

[0028] A second temperature sensor is installed on the cooler;

[0029] The separator is equipped with a safety valve at the top and a drain valve at the bottom;

[0030] The second temperature sensor, safety valve, and drain valve are respectively connected to the controller.

[0031] Furthermore, the dehydration unit also includes: an explosion-proof thermal resistor and a first temperature sensor;

[0032] The electric heater is equipped with an explosion-proof thermal resistor on its top and a first temperature sensor on its side wall.

[0033] The explosion-proof thermal resistor and the first temperature sensor are respectively connected to the controller.

[0034] Furthermore, the electric heater includes an explosion-proof electric heating core and an electric heater housing;

[0035] The explosion-proof electric heating furnace core is installed inside the electric heater housing.

[0036] Furthermore, it also includes: intake valve and exhaust valve;

[0037] The air intake valve is located on the side wall of the first filter;

[0038] The exhaust valve is located on the side wall of the second filter;

[0039] The intake valve and exhaust valve are respectively connected to the controller.

[0040] Furthermore, the ratio of the longitudinal cross-sectional area of ​​the first region to the longitudinal cross-sectional area of ​​the multi-zone dehydration turntable is 60%-67%;

[0041] The ratio of the longitudinal cross-sectional area of ​​the second region to the longitudinal cross-sectional area of ​​the multi-zone dehydration turntable is 33%-40%;

[0042] The height range of the multi-zone dehydration turntable is 300-500mm;

[0043] The ratio of the height of the molecular sieve packing layer to the height of the multi-zone dewatering disc is 30%-50%.

[0044] Furthermore, the molecular sieve is spherical.

[0045] Compared with the prior art, the beneficial effects of this utility model are:

[0046] 1) Design a brand-new high-pressure dehydration system, which, together with the existing venting air boosting and compression recovery device, performs deep dehydration on the high-pressure natural gas after boosting and compression, so as to meet the actual application requirements of compressed natural gas depressurization application;

[0047] 2) The high-pressure dehydration system achieves integrated water intake and dehydration through a rotating dehydration and suction partition, avoiding the high failure rate caused by frequent switching of multiple valves in the multi-tower standby mode, which affects continuous operation;

[0048] 3) Heat exchange is performed between the high-temperature gas in the dehydration zone and the low-temperature gas after cooling separation, which avoids energy waste in the system and increases energy utilization.

[0049] 4) The highly integrated design keeps the equipment's dimensions within a reasonable range, allowing for small skid-mounting and easy transportation, thus increasing the range of applications for the equipment on site.

[0050] 5) It has a high degree of automation, enabling unattended operation and remote control.

[0051] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 A schematic diagram of a high-pressure dehydration system according to an embodiment of the present invention is shown;

[0054] Figure 2 A schematic diagram of the controller connection according to an embodiment of the present invention is shown.

[0055] Reference numerals: 1. First filter; 2. Multi-zone rotary dewatering disc; 3. Second filter; 4. Electric heater; 41. Explosion-proof RTD; 42. First temperature sensor; 5. Roots circulating fan; 6. Tubular heat exchanger; 7. Cooler; 71. Second temperature sensor; 8. Separator; 81. Safety valve; 9. Controller; 101. Inlet valve; 102. Exhaust valve; 103. Heating gas control valve; 104. Desorption gas control valve; 105. Drain valve. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0057] like Figure 1 As shown in the embodiment of this utility model, a high-pressure dehydration system for oil and gas wells after air release and pressurization includes: a first filter 1, a multi-zone rotary table for suction and dehydration 2, a second filter 3, a controller 9, and a dehydration unit;

[0058] The multi-zone dehydration turntable 2 is provided with multiple transverse chambers inside; the multi-zone dehydration turntable 2 includes a first zone and a second zone;

[0059] The first filter 1 is connected to the left end of a plurality of transverse chambers located in the first region;

[0060] The second filter 3 is connected to the right end of a plurality of transverse chambers located in the first region;

[0061] One end of the dehydration unit is connected to the right end of one or more transverse chambers located in the second region, and the other end is connected to the desorption gas outlet of one or more transverse chambers located in the second region; wherein, the desorption gas outlet is located on the annular sidewall of the transverse chamber;

[0062] For example, the first region is a water absorption region and the second region is a dehydration region; the water absorption region is provided with two transverse chambers and the dehydration region is provided with one transverse chamber.

[0063] The controller 9 is connected to the first filter 1, the multi-zone dehydration turntable 2, the second filter 3, and the dehydration unit (not shown in the figure);

[0064] The transverse chamber is filled with molecular sieves;

[0065] The multi-zone dehydration turntable 2 is cylindrical in shape with a circular longitudinal section and is horizontally arranged.

[0066] The longitudinal section of the transverse chamber is fan-shaped. The longitudinal sections of all the transverse chambers form a circle, that is, they are assembled into the circular longitudinal section of the multi-zone dehydration turntable 2.

[0067] The first filter 1 is designed to remove large particulate solid impurities and free oil and water from the gas, thereby ensuring the service life of the adsorbent.

[0068] The purpose of the multi-zone rotary table 2 for dehydration and dehydration is to divide the structure into 3-5 zones through reasonable partitioning, integrating the water absorption zone and the dehydration zone into one, and realizing the continuous process of water absorption and dehydration through rotation, so as to ensure the sustainable operation of the dehydration system.

[0069] The dehydration multi-zone rotary disc 2 uses high-quality 4A spherical molecular sieves inside, which can deeply remove residual moisture from natural gas. At the same time, it has selective adsorption properties and can also adsorb trace amounts of harmful impurities such as H2S and SO2 carried in the gas.

[0070] The second filter 3 filters out dust from the dried natural gas before it enters the subsequent refueling column, ensuring that the maximum particle size in the exhaust is ≤5μm, which can effectively protect downstream equipment.

[0071] Controller 9 employs a programmable logic controller (PLC) to monitor all electrical components of the high-pressure dehydration system in real time, enabling automatic detection, adjustment, and control. It features highly intelligent and user-friendly alarm and shutdown functions, and can also record, collect, and transmit data. This ensures stable and safe operation of the dehydration system even without human intervention, significantly improving its efficiency. In addition to a local touchscreen for control, a remote transmission port allows connection to a host computer for remote operation. It boasts a high degree of automation, enabling unattended operation as well as remote control.

[0072] In this utility model, all equipment in the high-pressure dehydration system is concentrated in a single skid, which has a small footprint and is easy and flexible to install. Its main function is to deeply dehydrate the high-pressure natural gas after the vented air is pressurized, meeting the actual usage requirements of compressed natural gas decompression applications. The water suction and dehydration are integrated through the suction and dehydration zone turntable 2, avoiding the high failure rate caused by frequent switching of multiple valves in the multi-tower standby mode, which affects continuous operation. The highly integrated design keeps the equipment size within a reasonable range, which can meet the requirements of small skid installation and easy transportation, increasing the scope of on-site application of the equipment.

[0073] In some embodiments, the dehydration system further includes: an air inlet valve 101 and an air outlet valve 102;

[0074] The intake valve 101 is disposed on the side wall of the first filter 1;

[0075] The exhaust valve 102 is disposed on the side wall of the second filter 3;

[0076] like Figure 2 As shown, the intake valve 101 and the exhaust valve 102 are respectively connected to the controller 9.

[0077] In some embodiments, the longitudinal section diameter of the multi-zone dehydration turntable 2 is calculated based on the gas volume processed by the turntable and the filtration gas velocity, wherein the filtration gas velocity ranges from 0.1 to 0.3 m / s.

[0078] The ratio of the longitudinal cross-sectional area of ​​the first zone to the longitudinal cross-sectional area of ​​the multi-zone dehydration turntable 2 is 60%-67%;

[0079] The ratio of the longitudinal cross-sectional area of ​​the second zone to the longitudinal cross-sectional area of ​​the multi-zone dehydration turntable 2 is 33%-40%.

[0080] The height range of the multi-zone dehydration turntable 2 is 300-500mm;

[0081] The ratio of the height of the molecular sieve packing layer to the height of the multi-zone dewatering turntable 2 is 30%-50%.

[0082] The multi-zone dewatering turntable 2 adopts a mechanical rotation method. The rotation cycle is controlled by the controller 9 based on the water absorption saturation time of the molecular sieve. Before rotation, the multi-zone dewatering turntable 2 automatically disconnects from the first filter 1 and the second filter 3. Then, the transverse chamber containing the water-saturated molecular sieve rotates into the dewatering zone. The transverse chamber that has been dewatered and fully cooled rotates into the water absorption zone for water absorption. The multi-zone dewatering turntable 2 automatically connects to the first filter 1 and the second filter 3 respectively, and repeats the cycle.

[0083] In some embodiments, the multi-zone dehydration turntable 2 is connected to a motor, which drives the multi-zone dehydration turntable 2 to rotate. The motor is connected to a controller 9 to achieve automated control.

[0084] In some embodiments, the dehydration unit includes an electric heater 4, a Roots circulating fan 5, a cooler 7, and a separator 8;

[0085] The electric heater 4, the Roots circulating fan 5, the separator 8 and the cooler 7 are connected in sequence;

[0086] The top of the electric heater 4 is connected to the right end of one or more transverse chambers located in the second region;

[0087] The inlet of the cooler 7 is connected to the desorption gas outlet of one or more transverse chambers located in the second region.

[0088] In some embodiments, the dehydration unit further includes: a tubular heat exchanger 6;

[0089] The first inlet of the tubular heat exchanger 6 is connected to the desorbed gas outlet of one or more transverse chambers located in the second region, and the first outlet is connected to the cooler 7.

[0090] The second inlet of the tubular heat exchanger 6 is connected to the separator 8, and the second outlet is connected to the Roots circulation fan 5.

[0091] By exchanging heat between the high-temperature gas in the dehydration zone and the low-temperature gas after cooling separation, energy waste within the system is avoided and energy utilization is increased.

[0092] The main processing route of the high-pressure dehydration system consists of the first filter 1, the multi-zone rotary dehydration disc 2, and the second filter 3. The molecular sieve dehydration and regeneration circulation route consists of the electric heater 4, the Roots circulating fan 5, the tubular heat exchanger 6, the cooler 7, and the separator 8.

[0093] The electric heater 4 includes an explosion-proof electric heating core and an electric heater housing; the explosion-proof electric heating core is disposed inside the electric heater housing.

[0094] The furnace core uses stainless steel electric heating tubes with a power density of ≤2W / cm³. 2 It operates under the control of controller 9 to heat up the regenerated gas.

[0095] The Roots circulation blower 5 is one of the key components that enables the system to operate continuously and effectively, providing the power for the continuous circulation of regenerated gas.

[0096] The tubular heat exchanger 6 exchanges heat between the high-temperature gas in the dehydration zone and the low-temperature gas after cooling separation, thereby reducing the heat input of the electric heater 4 and the cold input of the cooler 7, thus saving energy.

[0097] Cooler 7 uses water cooling to ensure sufficient cooling of the desorbed gas.

[0098] Separator 8 uses sedimentation and dehydration technology to effectively separate moisture from the gas.

[0099] In some embodiments, the dehydration unit further includes: a heating gas control valve 103 and a desorption gas control valve 104;

[0100] One end of the heating gas control valve 103 is connected to the top of the electric heater 4, and the other end is connected to the right end of one or more transverse chambers located in the second region.

[0101] One end of the desorption gas control valve 104 is connected to the desorption gas outlet of one or more transverse chambers located in the second region, and the other end is connected to the tubular heat exchanger 6.

[0102] like Figure 2 As shown, the heating gas control valve 103 and the desorption gas control valve 104 are respectively connected to the controller 9.

[0103] In some embodiments, the dehydration unit further includes: a second temperature sensor 71, a safety valve 81, and a drain valve 105;

[0104] A second temperature sensor 71 is provided on the cooler 7;

[0105] The separator 8 is equipped with a safety valve 81 at the top and a drain valve 105 at the bottom;

[0106] The second temperature sensor 71, safety valve 81 and drain valve 105 are respectively connected to the controller 9.

[0107] Safety valve 81 is a closed-loop full-opening safety valve. When the pressure in the pipeline or equipment is too high and reaches the opening pressure, safety valve 81 will open to release pressure to ensure the safety of the dehydration system.

[0108] In some embodiments, the dehydration unit further includes: an explosion-proof thermal resistor 41 and a first temperature sensor 42;

[0109] The electric heater 4 is equipped with an explosion-proof thermal resistor 41 on its top and a first temperature sensor 42 on its side wall.

[0110] The explosion-proof thermal resistor 41 and the first temperature sensor 42 are respectively connected to the controller 9.

[0111] The first temperature sensor 42 and the second temperature sensor 71 are used for temperature monitoring, with a temperature range of 0-200℃.

[0112] The explosion-proof RTD 41 is an industrial-grade explosion-proof platinum resistance thermometer, a type of temperature sensor. It is used in environments with various flammable and explosive chemical gases and vapors to prevent the environment from exploding.

[0113] The working process of the high-pressure dehydration system is as follows:

[0114] After being compressed by the compressor to a pressure of 20MPa to 25MPa, the released air first passes through the first filter 1 to remove tiny particles and water. The high-pressure gas, after preliminary filtration, enters the molecular sieve dehydration multi-zone rotary disc 2, which is divided into 3-5 zones. Molecular sieves are used as solid adsorbents; zones 2-3 are for water absorption, and zones 1-2 are for dehydration. The rotary disc 2 rotates mechanically, with the rotation cycle determined by the saturation time of the molecular sieves in the transverse chamber. Once the molecular sieves in the transverse chamber are saturated, the disc rotates into the dehydration zone for further dehydration. The dehydrated and fully cooled transverse chamber then enters the water absorption zone for water absorption, and the cycle repeats. The dehydrated gas is then introduced into the second filter 3 for further removal of fine impurities. The deeply dehydrated and purified high-pressure gas is then piped to a loading vehicle for filling.

[0115] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure dehydration system for air release, pressurization, and compression after oil and gas well venting, characterized in that: include: First filter (1), multi-zone dehydration disc (2), second filter (3), controller (9) and dehydration unit; The multi-zone dehydration turntable (2) is provided with multiple transverse chambers; the multi-zone dehydration turntable (2) includes a first zone and a second zone; The first filter (1) is connected to the left end of a plurality of transverse chambers located in the first region; The second filter (3) is connected to the right end of a plurality of transverse chambers located in the first region; One end of the dehydration unit is connected to the right end of one or more transverse chambers located in the second region, and the other end is connected to the desorption gas outlet of one or more transverse chambers located in the second region. The controller (9) is connected to the first filter (1), the dehydration multi-zone turntable (2), the second filter (3), and the dehydration unit, respectively. The transverse chamber is filled with molecular sieves; The dehydration multi-zone turntable (2) is cylindrical in shape and has a circular longitudinal section; The longitudinal section of the transverse chamber is fan-shaped.

2. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 1, characterized in that, The dehydration unit includes an electric heater (4), a Roots circulating fan (5), a cooler (7), and a separator (8); The electric heater (4), the Roots circulating fan (5), the separator (8) and the cooler (7) are connected in sequence; The top of the electric heater (4) is connected to the right end of one or more transverse chambers located in the second region; The inlet of the cooler (7) is connected to the desorption gas outlet of one or more transverse chambers located in the second region.

3. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 2, characterized in that, The dehydration unit also includes: a tubular heat exchanger (6); The first inlet of the tubular heat exchanger (6) is connected to the desorbed gas outlet of one or more transverse chambers located in the second region, and the first outlet is connected to the cooler (7); The second inlet of the tubular heat exchanger (6) is connected to the separator (8), and the second outlet is connected to the Roots circulating fan (5).

4. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 3, characterized in that, The dehydration unit further includes: a heating gas control valve (103) and a desorption gas control valve (104); One end of the heating gas control valve (103) is connected to the electric heater (4), and the other end is connected to the right end of one or more transverse chambers located in the second region; One end of the desorption gas control valve (104) is connected to the desorption gas outlet of one or more transverse chambers located in the second region, and the other end is connected to the tubular heat exchanger (6); The heating gas control valve (103) and the desorption gas control valve (104) are respectively connected to the controller (9).

5. The high-pressure dehydration system for air release and pressurization after compression in oil and gas wells according to claim 2 or 3, characterized in that, The dehydration unit also includes: a second temperature sensor (71), a safety valve (81), and a drain valve (105); A second temperature sensor (71) is provided on the cooler (7); The separator (8) is equipped with a safety valve (81) at the top and a drain valve (105) at the bottom; The second temperature sensor (71), safety valve (81) and drain valve (105) are respectively connected to the controller (9).

6. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 2 or 3, characterized in that, The dehydration unit also includes: an explosion-proof thermal resistor (41) and a first temperature sensor (42); The electric heater (4) is equipped with an explosion-proof thermal resistor (41) on its top and a first temperature sensor (42) on its side wall; The explosion-proof thermal resistor (41) and the first temperature sensor (42) are respectively connected to the controller (9).

7. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 2, characterized in that, The electric heater (4) includes an explosion-proof electric heating core and an electric heater housing; The explosion-proof electric heating furnace core is installed inside the electric heater housing.

8. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 1, characterized in that, Also includes: Intake valve (101) and exhaust valve (102); The intake valve (101) is located on the side wall of the first filter (1); The exhaust valve (102) is located on the side wall of the second filter (3); The intake valve (101) and exhaust valve (102) are respectively connected to the controller (9).

9. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 1, characterized in that, The ratio of the longitudinal cross-sectional area of ​​the first region to the longitudinal cross-sectional area of ​​the multi-zone dehydration turntable (2) is 60%-67%; The ratio of the longitudinal cross-sectional area of ​​the second region to the longitudinal cross-sectional area of ​​the dehydration multi-zone turntable (2) is 33%-40%; The height range of the multi-zone dehydration turntable (2) is 300-500 mm; The ratio of the height of the molecular sieve packing layer to the height of the dewatering multi-zone turntable (2) is 30%-50%.

10. The high-pressure dehydration system after air release and pressurization in oil and gas wells according to claim 1, characterized in that, The molecular sieve is spherical.

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