Underground gas-water two-phase jet drainage device and use method

Abstract

The present invention relates to the technical field of oil and gas fields and coalbed methane mining engineering, and in particular to an underground gas-water two-phase jet drainage device and a method for using the device. The technical solution is as follows: the lower outer wall of the hydraulic pump body is provided with one or more leather cups, the upper end of the hydraulic pump body is connected to the lower end of the pneumatic pump body through the upper joint of the hydraulic pump; the outer side of the pneumatic pump body is installed with an air distribution and air collection umbrella tube, the interior of the pneumatic pump body is provided with a pneumatic throat, a droplet micronizer and a pneumatic nozzle, a pneumatic diffusion chamber is provided at the upper part of the pneumatic throat, a pneumatic nozzle is provided at the lower part of the pneumatic throat, a droplet micronizer is provided on the upper side, the lower end of the pneumatic nozzle is connected to the air inlet, and the upper end of the pneumatic nozzle is connected to the mixed liquid channel. The beneficial effect is: by designing the hydraulic pump body and the pneumatic pump body to be integrated into an organic whole, the structure is compact and novel, the high-pressure water jet is integrated to accelerate the atomized liquid flow and the high-pressure gas jet to realize jet drainage, which greatly improves the lifting head, and also has a negative pressure suction and unblocking effect on other blockages in the production layer.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas fields and coalbed methane mining engineering, and in particular to an underground gas-water two-phase jet drainage device and a use method thereof. Background Art

[0002] During the exploitation of medium-deep natural gas wells, deep shale gas wells and coalbed methane wells, as the formation pressure gradually decreases, water accumulation at the bottom of the well intensifies, resulting in water blockage, low production and even shutdown of the gas well. Existing drainage processes and devices such as bubble drainage, plunger drainage, gas lift, mechanical pumping and hydraulic pumping all have good initial effects. However, as the formation pressure continues to drop and the output gas-water ratio decreases, they are restricted by the lifting head and the large difference in gas-water density, which makes separation and slippage very easy. As a result, they show low efficiency, long time, high cost and even no effect. Some gas wells will also experience the phenomenon of construction fluid backflowing into the production layer, especially in wells with low gas production and large water production. It is more prominent and more difficult to meet the needs of low liquid level, deep wells and ultra-deep wells.

[0003] Therefore, it is necessary to invent a new, more efficient and practical drainage and gas production device with a lifting head greater than 3500 meters. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned defects of the prior art and provide an underground gas-water two-phase jet production device and a method of use. By designing the hydraulic pump body and the pneumatic pump body into an organic whole, the structure is compact and novel. The high-pressure water jet speed-increasing atomized liquid flow is integrated with the high-pressure gas jet to achieve jet production, which greatly improves the lifting head and also has a negative pressure suction and unblocking effect on other blockages in the production layer.

[0005] The present invention mentions an underground gas-water two-phase jet production device, and its technical solution is: including a hydraulic pump body, a diffuser, a hydraulic throat, a hydraulic nozzle, a power water inlet, and a formation fluid channel. The hydraulic pump body is provided with a diffuser, a hydraulic throat and a hydraulic nozzle, the upper end of the hydraulic throat is provided with a diffuser, the lower end of the hydraulic throat is provided with a hydraulic nozzle, the lower end of the hydraulic nozzle is connected to the power water inlet, and the upper end of the hydraulic nozzle is connected to the formation fluid channel, wherein, it also includes a pneumatic pump body, an air distribution and air collection umbrella tube, a pneumatic throat, a droplet micronizer, a pneumatic nozzle, an air inlet, a mixing A liquid combining channel, a leather cup, and an upper joint of a hydraulic pump. The lower outer wall of the hydraulic pump body is provided with more than one group of leather cups. The upper end of the hydraulic pump body is connected to the lower end of the pneumatic pump body through the upper joint of the hydraulic pump. An air separation and air collecting umbrella tube is installed on the outer side of the pneumatic pump body. A pneumatic throat, a droplet micronizer and a pneumatic nozzle are provided inside the pneumatic pump body. A pneumatic diffusion chamber is provided at the upper part of the pneumatic throat, and a pneumatic nozzle is provided at the lower part of the pneumatic throat. A droplet micronizer is installed on the upper side of the pneumatic nozzle. The lower end of the pneumatic nozzle is connected to the air inlet, and the upper end of the pneumatic nozzle is connected to the mixed liquid channel.

[0006] Preferably, the above-mentioned gas-separating and gas-collecting umbrella tube includes an umbrella tube connector, a separation cover, annular blades, air flow holes, internal threads, and an umbrella tube lower joint. The lower part of the umbrella tube connector forms a whole with the separation cover, and an internal thread is provided on the inner wall of the umbrella tube connector for connecting and fixing with the pneumatic pump body; the separation cover is a cylindrical structure, and a plurality of groups of air flow holes are provided on the outer wall of the separation cover, and annular blades are fixed on the upper side of each group of air flow holes for collecting gas and allowing the gas to enter the interior of the separation cover along the air flow holes, and the lower part of the separation cover is provided with an umbrella tube lower joint.

[0007] Preferably, the annular blades are fixed obliquely downward along the outer wall of the separation cover, the inner diameter of the separation cover is larger than the outer diameter of the pneumatic pump body, and an annular cavity is formed between the separation cover and the pneumatic pump body.

[0008] Preferably, the above-mentioned droplet micronizer includes a skeleton support column, an atomizing ring sheet, a jet annular gap, a mounting hole and a fixed ring. The skeleton support column is provided with multiple groups of atomizing ring sheets, and jet annular gaps are formed between adjacent atomizing ring sheets. Fixed rings are fixed at both ends of the skeleton support column, and a mounting hole is formed in the center of the fixing ring and the center of the atomizing ring sheet for installation on the outside of the outlet end of the pneumatic nozzle.

[0009] Preferably, the atomizing ring sheet is a circular ring with a thick center and gradually thinner outer edges, and the skeleton support columns are four groups.

[0010] Preferably, the upper joint of the hydraulic pump is connected to the lower end of the pneumatic pump body via a thread, and the outer diameter of the upper joint of the hydraulic pump is smaller than the inner diameter of the separation cover.

[0011] Preferably, a protruding fixing seat is provided at the lower portion of the hydraulic pump body, and a guiding inclined surface is provided at the lower end of the protruding fixing seat, and a plurality of groups of leather cups are distributed on the protruding fixing seat.

[0012] Preferably, the inner cavity of the leather cup is provided with reinforcing ribs, and the leather cup is an oblique upward structure.

[0013] The method for using the underground gas-water two-phase jet drainage device mentioned in the present invention includes the following steps:

[0014] First, high-pressure water and high-pressure gas are injected into the annulus between the oil pipe and the casing from the ground. The high-pressure water and high-pressure gas injected into the well are separated by gravity at the gas separation and collection parachute. The separated high-pressure gas ascends along the multiple annular blades and air flow holes on the gas separation and collection parachute and enters the air inlet of the pneumatic pump body. The high-pressure gas continues to spray upward along the pneumatic nozzle, thereby ejecting the mixed liquid pumped from the hydraulic pump body.

[0015] Second, the high-pressure water separated by gas and water gravity flows downward into the power water inlet of the lower hydraulic pump body, and then is ejected along the hydraulic nozzle, thereby drawing the accumulated water from the well into the formation fluid channel. The resulting gas-containing mixed liquid flows upward along the diffuser tube into the mixed liquid channel of the upper pneumatic pump body;

[0016] 3. The gas-containing mixed liquid enters the droplet atomizer in the pneumatic pump body, passes through the jet ring gap between the atomizing ring pieces, and is sheared, mixed, and finely atomized with the high-pressure airflow ejected from the pneumatic nozzle. The misted gas-water mixed liquid enters the pneumatic throat for deep mixing, energy conversion, and atomization, forming a micro-water droplet suspension fluid with gas as the continuous phase and water as the dispersed phase. Part of the water film hanging on the wall is also dispersed by the high-speed airflow and moves upward. Driven by the high-pressure gas, it reaches the ground along the oil pipeline. During the upward process, as the pressure decreases, the gas expansion effect causes the mixed fluid to flow to the ground at high speed;

[0017] 4. After the mixed fluid reaches the ground, it is separated from the gas and water and recycled through a gas-liquid separator. After separation, part of the gas is output to the gas gathering system, and the other part is transported to the gas compressor to be used as the driving power medium of the pneumatic pump body of the well. In addition, the separated water is sent to the water tank and then recycled through the water pump, thereby realizing continuous drainage and gas production.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The present invention utilizes high-pressure gas and water as the power medium to drive the pneumatic pump body and the hydraulic pump body for suction, and adopts a two-phase integrated air-water jet to lift the water accumulated at the bottom of the well to the ground in the form of an air-suspended mist flow. The process principle is unique, advanced, practical, easy to operate, environmentally friendly and safe. After the high-pressure gas and high-pressure water transmitted to the bottom of the well by the surface equipment are mixed, the gas and water are separated by gravity through the gas separation and gas collection umbrella tube. The separated high-pressure gas goes up along the multiple annular blades and air flow holes on the gas separation and gas collection umbrella tube and enters the pneumatic pump body. The high-pressure gas continues to spray upward along the pneumatic nozzle, thereby eliciting the mixed liquid pumped by the hydraulic pump body, and then the gas expansion energy is used to lift the water out of the ground, which greatly improves the lifting head, and also has a negative pressure suction and unblocking effect on other blockages in the production layer, which is more suitable for drainage and gas production applications in deep gas wells and low-pressure gas wells.

[0020] 2. The gas-water two-phase jet drainage device of the present invention integrates the two-stage integrated relay jet driven by the gas-water two-phase power medium into an organic whole, with a compact and novel structure. It integrates the high-pressure water jet to accelerate the atomized liquid flow and the high-pressure gas jet to realize jet drainage, effectively increasing the upward kinetic energy of the mixed liquid and gas. It has good gas-liquid mixed atomization effect, high drainage head, high efficiency, low energy consumption, novel structure, simple and reliable operation, and can meet the drainage needs of gas wells with different gas-water ratios by optimizing the ratio, pressure and flow parameters of the injected water and gas. The device has a wide range of applications and is easy to operate, without the need to add too much construction equipment and additional construction media. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a structural diagram of the gas separation and collection parachute tube;

[0023] Figure 3 It is a schematic diagram of the structure of the droplet micronizer;

[0024] Figure 4 is a schematic diagram of the droplet micronizer from a top-down perspective;

[0025] Figure 5 It is a schematic diagram of the application principle of the present invention;

[0026] Figure 6 It is a structural schematic diagram of a second embodiment of the pneumatic pump body;

[0027] Figure 7 1 is a schematic structural diagram of a second embodiment of a droplet micronizer;

[0028] Figure 8 is a schematic structural diagram of a second embodiment of a droplet micronizer in a top view;

[0029] In the figure: pneumatic pump body 1, gas-distributing and collecting umbrella tube 2, pneumatic throat 3, droplet micronizer 4, pneumatic nozzle 5, air inlet 6, mixed liquid channel 7, hydraulic pump body 8, diffuser 9, hydraulic throat 10, hydraulic nozzle 11, power water inlet 12, formation fluid channel 13, leather cup 14, hydraulic pump upper joint 15, casing 16, oil pipe 17, downhole gas-water two-phase jet drainage device 18, check valve 19, gas compressor 20, wellhead assembly 21, water pump 22, water tank 23, gas-liquid separator 24, gas gathering system 25;

[0030] Umbrella tube connector 2.1, separation cover 2.2, annular blades 2.3, air flow holes 2.4, internal threads 2.5, umbrella tube lower joint 2.6, skeleton support column 4.1, atomizing ring piece 4.2, jet annular gap 4.3, mounting hole 4.4, fixing ring 4.5, protruding fixing seat 8.1, guide inclined surface 8.2. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] Example 1, reference Figure 1-Figure 5 The present invention mentions a downhole gas-water two-phase jet production device, including a hydraulic pump body 8, a diffuser 9, a hydraulic throat 10, a hydraulic nozzle 11, a power water inlet 12, and a formation fluid channel 13. The hydraulic pump body 8 is provided with a diffuser 9, a hydraulic throat 10 and a hydraulic nozzle 11. The upper end of the hydraulic throat 10 is provided with a diffuser 9, and the lower end of the hydraulic throat 10 is provided with a hydraulic nozzle 11. The lower end of the hydraulic nozzle 11 is connected to the power water inlet 12, and the upper end of the hydraulic nozzle 11 is connected to the formation fluid channel 13. It also includes a pneumatic pump body 1, an air distribution and air collection umbrella pipe 2, a pneumatic throat 3, a droplet micronizer 4, a pneumatic nozzle 5, and an air inlet 6. , mixed liquid channel 7, leather cup 14, hydraulic pump upper joint 15, the lower outer wall of the hydraulic pump body 8 is provided with more than one group of leather cups 14, the upper end of the hydraulic pump body 8 is connected to the lower end of the pneumatic pump body 1 through the hydraulic pump upper joint 15; the outer side of the pneumatic pump body 1 is installed with an air separation and air collecting umbrella tube 2, the interior of the pneumatic pump body 1 is provided with a pneumatic throat 3, a droplet micronizer 4 and a pneumatic nozzle 5, a pneumatic diffusion chamber is provided at the upper part of the pneumatic throat 3, a pneumatic nozzle 5 is provided at the lower part of the pneumatic throat 3, a droplet micronizer 4 is installed on the upper side of the pneumatic nozzle 5, the lower end of the pneumatic nozzle 5 is connected to the air inlet 6, and the upper end of the pneumatic nozzle 5 is connected to the mixed liquid channel 7.

[0033] Reference Figure 2 The gas separation and collection umbrella tube 2 mentioned in the present invention includes an umbrella tube connector 2.1, a separation cover 2.2, annular blades 2.3, air flow holes 2.4, internal threads 2.5, and an umbrella tube lower joint 2.6. The lower part of the umbrella tube connector 2.1 forms a whole with the separation cover 2.2, and an internal thread 2.5 is provided on the inner wall of the umbrella tube connector 2.1 for connecting and fixing with the pneumatic pump body 1; the separation cover 2.2 is a cylindrical structure, and a plurality of groups of air flow holes 2.4 are provided on the outer wall of the separation cover 2.2. An annular blade 2.3 is fixed on the upper side of each group of air flow holes 2.4, which is used to collect gas and allow the gas to enter the interior of the separation cover 2.2 along the air flow holes 2.4. The lower part of the separation cover 2.2 is provided with an umbrella tube lower joint 2.6.

[0034] The annular blades 2.3 are fixed obliquely downward along the outer wall of the separation cover 2.2. The inner diameter of the separation cover 2.2 is larger than the outer diameter of the pneumatic pump body 1, and an annular cavity is formed between the separation cover 2.2 and the pneumatic pump body 1.

[0035] Reference Figure 3-Figure 4The droplet micronizer 4 mentioned in the present invention includes a skeleton support column 4.1, an atomizing ring sheet 4.2, a jet annular gap 4.3, a mounting hole 4.4 and a fixing ring 4.5. The skeleton support column 4.1 is penetrated by multiple groups of atomizing ring sheets 4.2, and a jet annular gap 4.3 is formed between adjacent atomizing ring sheets 4.2. Fixing rings 4.5 are fixed at both ends of the skeleton support column 4.1, and a mounting hole 4.4 is formed at the center of the fixing ring 4.5 and the center of the atomizing ring sheet 4.2 for being mounted on the outside of the outlet end of the pneumatic nozzle 5.

[0036] The atomizing ring piece 4.2 is a circular ring with a thick center and gradually thinner outer edges, and the skeleton support column 4.1 is four groups.

[0037] The hydraulic pump upper connector 15 is connected to the lower end of the pneumatic pump body 1 through threads, and the outer diameter of the hydraulic pump upper connector 15 is smaller than the inner diameter of the separation cover 2.2.

[0038] The lower part of the hydraulic pump body 8 is provided with a protruding fixing seat 8.1, and the lower end of the protruding fixing seat 8.1 is provided with a guiding inclined surface 8.2. A plurality of groups of leather cups 14 are distributed on the protruding fixing seat 8.1.

[0039] The inner cavity of the leather cup 14 is provided with reinforcing ribs, and the leather cup is an oblique upward structure.

[0040] The method for using the underground gas-water two-phase jet drainage device mentioned in the present invention includes the following steps:

[0041] 1. Reference Figure 5 A downhole gas-water two-phase jet drainage device 18 is sent downhole through an oil pipe 17 at the surface wellhead. A check valve 19 is provided at the lower end of the downhole gas-water two-phase jet drainage device 18. A gas compressor 20, a water pump 22, a water tank 23, a gas-liquid separator 24, and a gas gathering system 25 are provided on one side of a wellhead device 21 on the surface. The output end of the gas compressor 20 is connected to the wellhead device 21, the input end of the gas compressor 20 is connected to the gas separation outlet of the gas-liquid separator 24, the liquid separation outlet of the gas-liquid separator 24 is connected to the water tank 23, the lower side of the water tank 23 is connected to the water pump 22, and the output end of the water pump 22 is connected to the wellhead device 21.

[0042] Second, high-pressure water and high-pressure gas are injected from the ground into the annulus between the oil pipe 17 and the casing 16. The high-pressure water and high-pressure gas injected into the well are separated by gravity at the gas-splitting and gas-collecting umbrella pipe 2. The separated high-pressure gas ascends along the multiple annular blades 2.3 and air holes 2.4 on the gas-splitting and gas-collecting umbrella pipe 2 and enters the air inlet 6 of the pneumatic pump body 1. The high-pressure gas continues to be ejected upward along the pneumatic nozzle 5, thereby ejecting the mixed liquid pumped from the hydraulic pump body 8.

[0043] 3. The high-pressure water separated by gravity flows downward into the power water inlet 12 of the lower hydraulic pump body 8, and then is ejected along the hydraulic nozzle 11, thereby drawing the accumulated water from the well into the formation fluid channel 13. The resulting gas-containing mixed liquid flows upward along the diffuser 9 into the mixed liquid channel 7 of the upper pneumatic pump body 1;

[0044] Fourth, the gaseous mixture enters the droplet atomizer 4 in the pneumatic pump body 1, passes through the jet annular gap 4.3 between the atomizing ring pieces 4.2, and is sheared, mixed, and finely atomized by the high-pressure airflow ejected from the pneumatic nozzle 5. The atomized gas-water mixture enters the pneumatic throat 3 for deep mixing, energy conversion, and atomization, forming an aerosol suspension of micro-water droplets with gas as the continuous phase and water as the dispersed phase. Part of the water film attached to the wall is also dispersed by the high-speed airflow and moves upward. Driven by the high-pressure gas, it reaches the ground along the oil pipe 17. During the upward process, as the pressure decreases, the gas expansion effect causes the mixed fluid to flow to the ground at high speed.

[0045] 5. After the mixed fluid reaches the ground, it is separated from the gas and water by the gas-liquid separator 24 and recycled. After separation, part of the gas is output to the gas collection system 25, and the other part of the gas is transported to the gas compressor 20 to be used as the driving power medium of the pneumatic pump body 1 of this well. In addition, the separated water is sent to the water tank 23 and then recycled by the water pump 22, thereby realizing continuous water drainage and gas production.

[0046] Example 2, the present invention mentions a downhole gas-water two-phase jet production device, including a hydraulic pump body 8, a diffuser 9, a hydraulic throat 10, a hydraulic nozzle 11, a power water inlet 12, and a formation fluid channel 13. The hydraulic pump body 8 is provided with a diffuser 9, a hydraulic throat 10 and a hydraulic nozzle 11. The upper end of the hydraulic throat 10 is provided with a diffuser 9, and the lower end of the hydraulic nozzle 11 is connected to the power water inlet 12. The upper end of the hydraulic nozzle 11 is connected to the formation fluid channel 13. It also includes a pneumatic pump body 1, an air distribution and air collection umbrella pipe 2, a pneumatic throat 3, a droplet micronizer 4, a pneumatic nozzle 5, an air inlet Mouth 6, mixed liquid channel 7, leather cup 14, hydraulic pump upper joint 15, the lower outer wall of the hydraulic pump body 8 is provided with more than one group of leather cups 14, the upper end of the hydraulic pump body 8 is connected to the lower end of the pneumatic pump body 1 through the hydraulic pump upper joint 15; the outer side of the pneumatic pump body 1 is installed with an air separation and air collecting umbrella tube 2, the interior of the pneumatic pump body 1 is provided with a pneumatic throat 3, a droplet micronizer 4 and a pneumatic nozzle 5, a pneumatic diffusion chamber is provided at the upper part of the pneumatic throat 3, a pneumatic nozzle 5 is provided at the lower part of the pneumatic throat 3, a droplet micronizer 4 is installed on the upper side of the pneumatic nozzle 5, the lower end of the pneumatic nozzle 5 is connected to the air inlet 6, and the upper end of the pneumatic nozzle 5 is connected to the mixed liquid channel 7.

[0047] The difference from Example 1 is:

[0048] Reference Figure 6-Figure 8, the droplet micronizer 4 mentioned in this embodiment is installed on the outside of the pneumatic nozzle 5, and the droplet micronizer 4 includes a skeleton support column 4.1, an atomizing ring sheet 4.2, a jet annular gap 4.3, and a mounting hole 4.4. The skeleton support column 4.1 is pierced with multiple groups of atomizing ring sheets 4.2, and the multiple groups of atomizing ring sheets 4.2 are in the shape of oblique stacks, and jet annular gaps 4.3 are formed between adjacent atomizing ring sheets 4.2, and a mounting hole 4.4 is formed in the center of the atomizing ring sheet 4.2 for being sleeved on the outside of the pneumatic nozzle 5; wherein, the inner diameter of the mounting hole 4.4 in the center of the atomizing ring sheet 4.2 becomes larger and larger from bottom to top, so that the mounting hole 4.4 forms a truncated cone-shaped cavity; in addition, the atomizing ring sheet 4.2 gradually becomes smaller from bottom to top, and the atomizing ring sheet 4.2 is a smooth annular structure, and the jet annular gap 4.3 formed is a gap of equal diameter;

[0049] In addition, eight skeleton support columns 4.1 are used, four in the inner circle and four in the outer circle, and all are arranged at an angle. This structure can also realize the function of droplet micronization.

[0050] The multiple sets of atomizing ring blades 4.2 used in this embodiment are in the form of obliquely stacked blades. The water from the formation divided by the atomizing ring blades 4.2 is sheared and atomized by the high-pressure gas injection and suction, and then drawn into the pneumatic throat 3. There, it is sheared, mixed, and finely atomized by the high-pressure airflow ejected from the pneumatic nozzle 5. The atomized air-water mixture enters the pneumatic throat 3 for deep mixing, energy conversion, and atomization, forming an aerosol suspension of micro-water droplets with gas as the continuous phase and water as the dispersed phase. Some water films attached to the wall are also dispersed by the high-speed airflow and upwardly transported along the oil pipe 17 under the propulsion of the high-pressure gas to the surface. As the pressure decreases during the upward process, the gas expansion effect causes the mixed fluid to flow toward the surface at high speed.

[0051] The above descriptions are merely some preferred embodiments of the present invention. Anyone skilled in the art may be able to modify the above-described technical solutions or convert them into equivalent technical solutions. Therefore, any corresponding simple modifications or equivalent transformations based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A downhole gas-water two-phase jet drainage device, comprising a hydraulic pump body (8), a diffuser (9), a hydraulic throat (10), a hydraulic nozzle (11), a power water inlet (12), and a formation fluid channel (13), wherein the hydraulic pump body (8) is provided with a diffuser (9), a hydraulic throat (10), and a hydraulic nozzle (11), the upper end of the hydraulic throat (10) is provided with a diffuser (9), the lower end of the hydraulic throat (10) is provided with a hydraulic nozzle (11), the lower end of the hydraulic nozzle (11) is connected to the power water inlet (12), and the upper end of the hydraulic nozzle (11) is communicated with the formation fluid channel (13), and the device is characterized in that: It also includes a pneumatic pump body (1), an air distribution and air collection umbrella tube (2), a pneumatic throat (3), a droplet micronizer (4), a pneumatic nozzle (5), an air inlet (6), a mixed liquid channel (7), a leather cup (14), and a hydraulic pump upper joint (15). The lower outer wall of the hydraulic pump body (8) is provided with one or more leather cups (14). The upper end of the hydraulic pump body (8) is connected to the lower end of the pneumatic pump body (1) through the hydraulic pump upper joint (15); the pneumatic pump body (1) An air distribution and air collection umbrella tube (2) is installed on the outside of the pneumatic pump body (1), a pneumatic throat (3), a droplet micronizer (4) and a pneumatic nozzle (5) are provided inside the pneumatic pump body (1), a pneumatic diffusion chamber is provided on the upper part of the pneumatic throat (3), a pneumatic nozzle (5) is provided on the lower part of the pneumatic throat (3), a droplet micronizer (4) is installed on the upper side of the pneumatic nozzle (5), the lower end of the pneumatic nozzle (5) is connected to the air inlet (6), and the upper end of the pneumatic nozzle (5) is connected to the mixed liquid channel (7); The gas separation and collection umbrella tube (2) comprises an umbrella tube connector (2.1), a separation cover (2.2), an annular blade (2.3), an air flow hole (2.4), an internal thread (2.5), and an umbrella tube lower joint (2.6). The lower portion of the umbrella tube connector (2.1) forms an integral body with the separation cover (2.2). An internal thread (2.5) is provided on the inner wall of the umbrella tube connector (2.1) for connecting and fixing with the pneumatic pump body (1). The separation cover (2.2) is a cylindrical structure. A plurality of groups of air flow holes (2.4) are provided on the outer wall of the separation cover (2.2). An annular blade (2.3) is fixed on the upper side of each group of air flow holes (2.4) for collecting gas and allowing the gas to enter the interior of the separation cover (2.2) along the air flow holes (2.4). The lower portion of the separation cover (2.2) is provided with an umbrella tube lower joint (2.6). The annular blades (2.3) are fixed obliquely downward along the outer wall of the separation cover (2.2); the inner diameter of the separation cover (2.2) is larger than the outer diameter of the pneumatic pump body (1); and an annular cavity is formed between the separation cover (2.2) and the pneumatic pump body (1).

2. The underground gas-water two-phase jet drainage device according to claim 1 is characterized in that: The droplet micronizer (4) comprises a skeleton support column (4.1), an atomizing ring sheet (4.2), a jet annular gap (4.3), a mounting hole (4.4) and a fixing ring (4.5). The skeleton support column (4.1) is provided with a plurality of groups of atomizing ring sheets (4.2), and jet annular gaps (4.3) are formed between adjacent atomizing ring sheets (4.2). Fixing rings (4.5) are fixed at both ends of the skeleton support column (4.1), and a mounting hole (4.4) is formed at the center of the fixing ring (4.5) and the center of the atomizing ring sheet (4.2) for mounting on the outside of the outlet end of the pneumatic nozzle (5).

3. The underground gas-water two-phase jet drainage device according to claim 2 is characterized in that: The atomizing ring piece (4.2) is a circular ring with a thick center and gradually thinner outer edges, and the skeleton support column (4.1) is four groups.

4. The underground gas-water two-phase jet drainage device according to claim 3 is characterized by: The hydraulic pump upper connector (15) is connected to the lower end of the pneumatic pump body (1) via a thread, and the outer diameter of the hydraulic pump upper connector (15) is smaller than the inner diameter of the separation cover (2.2).

5. The underground gas-water two-phase jet drainage device according to claim 4 is characterized in that: A protruding fixing seat (8.1) is provided at the lower portion of the hydraulic pump body (8), and a guiding inclined surface (8.2) is provided at the lower end of the protruding fixing seat (8.1). Multiple groups of leather cups (14) are distributed on the protruding fixing seat (8.1).

6. The underground gas-water two-phase jet drainage device according to claim 5, characterized in that: The inner cavity of the leather cup (14) is provided with reinforcing ribs, and the leather cup is an oblique upward structure.

7. The method for using the underground gas-water two-phase jet drainage device according to claim 6, characterized in that: The following processes are included:

1. Injecting high-pressure water and high-pressure gas from the ground into the annulus between the oil pipe (17) and the casing (16). The high-pressure water and high-pressure gas injected into the well are separated by gravity at the gas separation and collection umbrella tube (2). The separated high-pressure gas ascends along the multiple annular blades (2.3) and air flow holes (2.4) on the gas separation and collection umbrella tube (2) and enters the air inlet (6) of the pneumatic pump body (1). The high-pressure gas continues to be ejected upward along the pneumatic nozzle (5), thereby ejecting the mixed liquid pumped from the hydraulic pump body (8); Second, the high-pressure water separated by gravity flows downward into the power water inlet (12) of the lower hydraulic pump body (8), and then is ejected along the hydraulic nozzle (11), thereby drawing the accumulated water from the well into the formation fluid channel (13). The resulting gas-containing mixed liquid flows upward along the diffuser (9) into the mixed liquid channel (7) of the upper pneumatic pump body (1); 3. The gas-containing mixed liquid enters the droplet micro-mizer (4) in the pneumatic pump body (1), passes through the jet ring gap (4.3) between the atomizing ring pieces (4.2), and is sheared, mixed, and finely atomized with the high-pressure airflow ejected from the pneumatic nozzle (5). The misted gas-water mixed liquid enters the pneumatic throat (3) for deep mixing, energy conversion, and atomization, forming a micro-water droplet suspension fluid with gas as the continuous phase and water as the dispersed phase. Part of the water film hanging on the wall is also dispersed by the high-speed airflow and moves upward. Under the push of the high-pressure gas, it reaches the ground along the oil pipe (17). During the upward process, as the pressure decreases, the gas expansion effect causes the mixed fluid to flow to the ground at high speed; 4. After the mixed fluid reaches the surface, it is separated into gas and water through a gas-liquid separator (24) and recycled. After separation, a portion of the gas is output to the gas collection system (25), and the other portion of the gas is transported to the gas compressor (20) and used as the driving power medium of the pneumatic pump body (1) of the well. In addition, the separated water is sent to the water tank (23) and recycled through the water pump (22), thereby realizing continuous drainage and gas production.

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