Supersonic shock wave atomizing drainage gas recovery device

Abstract

The present application relates to a kind of supersonic shock wave atomization drainage gas recovery devices, including center tube, the center tube is opened through flow guide passage in axial, the both ends of flow guide passage are formed inlet, outlet respectively;The center tube on the side of inlet is installed connecting sleeve, the center tube on the side of outlet is installed telescopic sleeve, nozzle connector is installed in telescopic sleeve, nozzle connector is installed nozzle;At least one shock wave cavity is provided in the flow guide passage, the shock wave cavity is located in the flow guide passage close to the one end of connecting sleeve;Wherein, the shock wave cavity is the cavity that recesses towards the inner wall of center tube;The present application can have higher atomization efficiency.

Description

Technical Field

[0001] This invention belongs to the field of natural gas extraction technology, and in particular relates to a supersonic shock wave atomization drainage gas extraction device. Background Technology

[0002] During natural gas extraction, the bottom hole pressure and natural gas flow rate gradually decrease over time, preventing the production water or condensate from being discharged with the gas flow, resulting in "liquid accumulation in the gas well." This affects the efficiency and production of natural gas extraction, and in severe cases, leads to well shutdown. Therefore, it is necessary to develop new methods and technologies for drainage gas extraction that are highly reliable, efficient, and economical.

[0003] Currently, the main drainage and gas production methods for bottom-hole liquid accumulation fall into three categories: pneumatic, mechanical, and physicochemical. Among them, the bottom-hole throttle is a type of pneumatic drainage and gas production device that uses pneumatic acceleration to increase the flow velocity and kinetic energy of natural gas at the bottom of the well, thereby overcoming the insufficient carrying capacity of the gas-liquid two-phase flow medium due to low flow velocity.

[0004] The more advanced existing throttle-type drainage and gas production devices achieve supersonic acceleration through supersonic nozzles and airflow, which can atomize the liquid accumulated in the gas well at supersonic speed, thereby improving the drainage and gas production efficiency. However, achieving supersonic acceleration of the liquid by supersonic nozzles and airflow alone still has certain limitations, and there is still considerable room for improvement in atomization efficiency. Summary of the Invention

[0005] The technical problem solved by this invention is achieved through the following technical solution:

[0006] A supersonic shock wave atomization drainage and gas collection device includes a central pipe, wherein a through guide channel is opened in the central pipe in the axial direction, and an inlet and an outlet are formed at both ends of the guide channel, respectively.

[0007] A connecting sleeve is installed on the central tube on the inlet side, and a telescopic sleeve is installed on the central tube on the outlet side. A nozzle connector is installed inside the telescopic sleeve, and a nozzle is installed on the nozzle connector.

[0008] At least one shock cavity is provided in the guide channel, and the shock cavity is located at one end of the guide channel near the connecting sleeve;

[0009] The shock cavity is a cavity recessed towards the inner wall of the central tube; the bottom wall of the shock cavity is also provided with a protrusion protruding towards the center of the guide channel, and the protrusion is smoothly connected to the bottom wall of the shock cavity.

[0010] It also includes a Mach shock structure, which is connected to the inlet side of the central tube via a connecting sleeve.

[0011] Furthermore, multiple shock cavities can be arranged circumferentially along the inner wall of the central tube, or multiple shock cavities can be arranged axially along the inner wall of the central tube.

[0012] Furthermore, the distance between the shock cavity and the inlet of the central tube is denoted as L1, and L1 ≥ 40 mm.

[0013] Furthermore, the width of the shock cavity is denoted as L2, and L2 ≥ 5 mm.

[0014] Furthermore, the depth of the shock cavity is denoted as L3, and L3 ≥ 3 mm.

[0015] Furthermore, the outer periphery of the central tube is provided with an upper sealing rubber tube and a lower sealing rubber tube spaced apart from each other; the outer periphery of the central tube is also provided with two sealing grooves between the upper sealing rubber tube and the lower sealing rubber tube, and an annular sealing ring is installed in each of the two sealing grooves; the two annular sealing rings respectively abut against the two sides of the upper sealing rubber tube and the lower sealing rubber tube that are close to each other.

[0016] Furthermore, the outer periphery of the telescopic sleeve is also fitted with a support sleeve and a guide sleeve; the internal thread of the support sleeve is fitted with an adjusting nut; the support sleeve is connected to the guide sleeve through the adjusting nut.

[0017] Furthermore, a break rod is also provided in the central tube; a shear pin is provided through the break rod and the central tube, and one end of the break rod extends into the nozzle connector.

[0018] The advantages and positive effects of this invention are:

[0019] The atomized drainage gas extraction device of the present invention generates shock wave turbulence when the gas flow flows into the shock wave cavity, thereby enabling the gas-liquid mixture in the natural gas to be initially sheared and broken in the shock wave cavity, thus enabling the supersonic shock wave atomized drainage gas extraction device to have higher atomization efficiency. Attached Figure Description

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless specifically indicated, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0021] Figure 1 This is a front view of the supersonic shock wave atomization drainage gas collection device provided in the embodiments of this application;

[0022] Figure 2 A vertical sectional view of the supersonic shock wave atomization drainage gas collection device provided in the embodiments of this application;

[0023] Figure 3 for Figure 2 A vertical sectional view of the central tube in the middle;

[0024] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0025] Figure 5 A schematic diagram of the Mach structure provided for an embodiment of this application. Detailed Implementation

[0026] First, it should be noted that the specific structure, features, and advantages of the present invention will be described in detail below by way of examples. However, all descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the accompanying drawings, can still be arbitrarily combined or deleted among these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned herein. Additionally, for the sake of simplifying the drawings, the same or similar technical features may be indicated only in one place in the same drawing.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0029] like Figures 1 to 4 The present embodiment provides a supersonic shock wave atomization drainage gas collection device, characterized in that it includes a central pipe 1, wherein the central pipe 1 has a through guide channel 11 in the axial direction, and the two ends of the guide channel 11 form an inlet and an outlet respectively.

[0030] A connecting sleeve 2 is installed on the central tube 1 on the inlet side, a telescopic sleeve 3 is installed on the central tube 1 on the outlet side, a nozzle connector 4 is installed inside the telescopic sleeve 3, and a nozzle 5 is installed on the nozzle connector 4.

[0031] At least one shock cavity 12 is provided in the guide channel 11, and the shock cavity 12 is located at one end of the guide channel 11 near the connecting sleeve 2;

[0032] The shock cavity 12 is a cavity recessed towards the inner wall of the central tube 1.

[0033] The bottom wall of the shock cavity 12 is also provided with a protrusion 121 that protrudes toward the center of the guide channel 11, and the protrusion 121 is smoothly connected to the bottom wall of the shock cavity 12.

[0034] It also includes a Mach shock structure, which is connected to the inlet side of the central tube 1 via a connecting sleeve 2.

[0035] Multiple shock cavities can be arranged circumferentially along the inner wall of the central tube 1, or multiple shock cavities can be arranged axially along the inner wall of the central tube.

[0036] The distance between the shock cavity 12 and the inlet of the central tube 1 is denoted as L1, and L1 ≥ 40 mm.

[0037] The width of the shock cavity 12 is denoted as L2, and L2 ≥ 5 mm.

[0038] The depth of the shock cavity 12 is denoted as L3, and L3 ≥ 3 mm.

[0039] The outer periphery of the central tube 1 is provided with an upper sealing rubber tube and a lower sealing rubber tube spaced apart from each other;

[0040] Two sealing grooves are provided on the outer periphery of the central tube 1 between the upper sealing tube and the lower sealing tube, and annular sealing rings 7 are installed in each of the two sealing grooves; the two annular sealing rings 7 respectively abut against the two sides of the upper sealing tube and the lower sealing tube that are close to each other.

[0041] The outer periphery of the telescopic sleeve 3 is also fitted with a support sleeve 8 and a guide sleeve; the internal thread of the support sleeve 8 is fitted with an adjusting nut 81; the support sleeve 8 is connected to the guide sleeve through the adjusting nut 81.

[0042] A pull rod 9 is also provided in the central tube 1; a shear pin is provided through the pull rod 9 and the central tube 1, and one end of the pull rod 9 extends into the nozzle connector 4.

[0043] When the supersonic shock wave atomization drainage and gas production device is in use, the high-pressure, low-speed gas flow at the bottom of the well is accelerated and flows into the central pipe 1 through the connecting sleeve 2. The speed of the gas flow in the central pipe 1 is continuously increased. When the gas flow is about to reach the nozzle 5, the gas flow speed is increased to the critical state - that is, the local speed of sound. Due to the reduction of the cross-section of the nozzle 5, the gas flow expands and is accelerated to the supersonic state. The supersonic gas flow is continuously accelerated in the nozzle 5 and finally ejected from the nozzle. Due to the carrying and shearing effect of the supersonic jet, the particle size of the liquid working fluid in the gas-liquid mixture is further broken down and reduced, thereby realizing the supersonic atomization effect. The atomized gas-liquid mixture is lifted through the pipeline to the wellhead for discharge, and finally the purpose of drainage and gas production is achieved.

[0044] Moreover, since the central pipe 1 has at least one shock cavity 12 in the guide channel 11, when the gas flows into the shock cavity 12, shock turbulence will be generated, so that the gas-liquid mixture in the natural gas can be initially sheared and broken in the shock cavity 12, thereby enabling the supersonic shock wave atomization drainage gas extraction device to have higher atomization efficiency.

[0045] In an optional embodiment, the shock cavity 12 is an annular cavity recessed toward the inner wall of the central tube 1.

[0046] Specifically, such as Figure 3 Specifically, the shock cavity 12 is configured as an annular cavity recessed towards the inner wall of the central tube 1. In this way, when the airflow moves along the central tube 1, the airflow close to the inner wall of the central tube 1 can enter the shock cavity 12 more fully to generate more shock turbulence, so that the gas-liquid mixture in the natural gas can be more fully sheared and broken.

[0047] Of course, the shock cavity 12 can also be configured in other shapes, such as an arc-shaped cavity recessed towards the inner wall of the central tube 1. Multiple arc-shaped shock cavities 12 can be configured along the circumference of the inner wall of the central tube 1, and further additions can be made along the axial direction of the inner wall of the central tube 1.

[0048] In an optional embodiment, the bottom wall of the shock cavity 12 is further provided with a protrusion 121 that protrudes toward the center of the guide channel 11; the protrusion 121 is smoothly connected to the bottom wall of the shock cavity 12.

[0049] Specifically, such as Figure 4 The shock cavity 12 is provided with a protrusion 121 that protrudes towards the center of the guide channel 11 on the bottom wall. When the high-speed airflow enters the shock cavity 12, it will collide with the protrusion 121, thereby generating more shock turbulence in the shock cavity 12.

[0050] In an optional embodiment, the distance between the shock cavity 12 and the inlet of the central tube 1 is denoted as L1, and L1 ≥ 40 mm.

[0051] Specifically, such as Figure 4 As shown, the distance between the shock cavity 12 and the inlet of the central tube 1 is limited to at least 40 mm. This way, when the airflow flows in from the inlet of the central tube 1, it will undergo initial stabilization and acceleration in the guide channel 11 of the central tube 1, making the initial velocity of the airflow about to flow into the shock cavity 12 relatively fast and stable.

[0052] In an optional embodiment, the width of the shock cavity 12 is denoted as L2, and L2 ≥ 5mm.

[0053] Specifically, such as Figure 4 As shown, the width of the shock cavity 12 is limited to at least 5 mm, which ensures that the airflow has enough time to generate shock turbulence in the shock cavity 12.

[0054] In an optional embodiment, the depth of the shock cavity 12 is denoted as L3, and L3 ≥ 3 mm.

[0055] Specifically, such as Figure 4 As shown, the depth of the shock cavity 12 is limited to at least 3 mm, which ensures that the airflow can generate sufficiently strong shock turbulence in the shock cavity 12.

[0056] In an optional embodiment, a slip seat can be provided on the outer periphery of the central tube 1; slips are installed on the slip seat; by providing a slip seat and slips, the supersonic shock wave atomizing drainage gas collection device can be stably installed and fixed when installed on the oil pipe, and has better tolerance to high pressure in the oil pipe.

[0057] In an optional embodiment, the outer periphery of the central tube 1 is provided with an upper sealing rubber tube and a lower sealing rubber tube spaced apart from each other; the outer periphery of the central tube 1 is also provided with two sealing grooves between the upper sealing rubber tube and the lower sealing rubber tube, and an annular sealing ring 7 is installed in each of the two sealing grooves; the two annular sealing rings 7 respectively abut against the two sides of the upper sealing rubber tube and the lower sealing rubber tube that are close to each other.

[0058] Specifically, such as Figure 2 As shown, by setting the upper sealing sleeve, lower sealing sleeve and annular sealing ring 7, the supersonic shock wave atomization drainage gas extraction device can be ensured to have excellent sealing performance. Moreover, through the cooperation between the slip, the upper sealing sleeve and the lower sealing sleeve, the problems of high retrieval resistance and low retrieval success rate of the supersonic shock wave atomization drainage gas extraction device can also be solved.

[0059] In an optional embodiment, the outer periphery of the telescopic sleeve 3 is further fitted with a support sleeve 8 and a guide sleeve 6; an adjusting nut 81 is threaded into the inner part of the support sleeve 8; the support sleeve 8 is connected to the guide sleeve via the adjusting nut 81. Specifically, as shown... Figure 2 As shown, by setting up the support cylinder 8 and guide sleeve as described above, and connecting the support cylinder 8 to the guide sleeve through the adjusting nut 81, the relative position between the support cylinder 8 and the guide sleeve can be adjusted by rotating the adjusting nut 81, thereby facilitating lifting.

[0060] In an optional embodiment, a pull-off rod 9 is also provided in the central tube 1; a shear pin is provided through both the pull-off rod 9 and the central tube 1, and one end of the pull-off rod 9 extends into the nozzle connector 4; specifically, as shown... Figure 2 As shown, by setting the above-mentioned pull rod 9 and extending one end of the pull rod 9 into the nozzle connector 4, the sealing rubber sleeve can be recycled through the pull rod 9 after the installation of the supersonic shock wave atomization drainage gas collection device is completed, making it easy to reuse.

[0061] Furthermore, the Mach shock wave structure of this invention is based on BH-Mach shock wave atomization drainage and gas production technology. BH-Mach shock wave atomization drainage and gas production is a production technology that requires no external kinetic energy and relies solely on the gas well's own energy to achieve efficient drainage and stable production. This technology utilizes the BH-Mach shock wave atomizer, designed and developed based on aerospace aerodynamics and oscillating shock wave principles. Through a unique flow channel and shock wave chamber design, it generates ultra-high speed and shock waves, forcibly shearing and oscillating the passing droplets to form a finer, homogeneous mist flow. This allows the droplets to be discharged from the wellhead along with the gas, ensuring the continuity of gas well drainage and production. The BH-Mach shock wave atomizer has two functional areas: a shock wave oscillation shearing chamber and a Mach atomization lifting unit. The shock wave oscillation shearing chamber can perform cyclone shearing, and a strong cyclone is approaching. The system shreds and oscillates near-droplets, with high-frequency oscillations within the cavity further breaking down the flowing droplets. The Mach atomization lifting unit performs supersonic axial shearing, forcing uniform atomization of the high-speed airflow, achieving droplet sizes as small as 5μm, and increasing the lift to directly carry the droplets out of the wellhead. Utilizing the BH-Mach shockwave atomization drainage technology achieves the following advantages: continuous drainage production relying on the gas well's own energy; higher outflow velocity, 2-3 times Mach; stronger liquid carrying capacity, with a maximum drainage capacity of 10 cubic meters per day; atomized particle size as small as 15μm; and an effective droplet lift of 2000-2500m. Furthermore, the drainage efficiency is further improved by the supersonic shockwave atomization drainage gas production device provided by this invention, thereby ensuring no liquid accumulation occurs downhole.

[0062] The above embodiments have provided a detailed description of the present invention, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A supersonic shock wave atomization drainage and gas extraction device, characterized in that, Includes a central tube (1), wherein a through guide channel (11) is opened in the axial direction, and an inlet and an outlet are formed at both ends of the guide channel (11); A connecting sleeve (2) is installed on the central tube (1) on the inlet side, a telescopic sleeve (3) is installed on the central tube (1) on the outlet side, a nozzle connector (4) is installed inside the telescopic sleeve (3), and a nozzle (5) is installed on the nozzle connector (4). At least one shock cavity (12) is provided in the flow channel (11), and the shock cavity (12) is located at one end of the flow channel (11) near the connecting sleeve (2); when the gas flows into the shock cavity (12), shock turbulence will be generated, so that the gas-liquid mixture in the natural gas can be initially sheared and broken in the shock cavity (12); The shock cavity (12) is a cavity recessed towards the inner wall of the central tube (1); the bottom wall of the shock cavity (12) is also provided with a protrusion (121) protruding towards the center of the guide channel (11), and the protrusion (121) is smoothly connected to the bottom wall of the shock cavity (12); when the high-speed airflow enters the shock cavity (12), it will collide further with the protrusion (121), so that the high-speed airflow can generate more shock turbulence in the shock cavity (12); It also includes a Mach shock structure, which is connected to the inlet side of the central tube (1) via a connecting sleeve (2); the Mach shock structure has two functional areas, namely a shock wave oscillation shearing chamber and a Mach atomization lifting unit. The shock wave oscillation shearing chamber can realize cyclone shearing, the cyclone will cut up the nearby droplets and perform shock wave oscillation, and the Mach atomization lifting unit can perform supersonic axial shearing, so that the high-speed airflow is forced to be uniformly atomized.

2. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that: Multiple shock cavities can be arranged circumferentially along the inner wall of the central tube (1) or axially along the inner wall of the central tube.

3. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that: The distance between the shock cavity (12) and the inlet of the central tube (1) is denoted as L1, and L1 ≥ 40 mm.

4. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that: The width of the shock cavity (12) is denoted as L2, and L2≥5mm.

5. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that: The depth of the shock cavity (12) is denoted as L3, and L3 ≥ 3 mm.

6. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that: The outer periphery of the central tube (1) is provided with an upper sealing rubber tube and a lower sealing rubber tube spaced apart from each other; the outer periphery of the central tube (1) is also provided with two sealing grooves between the upper sealing rubber tube and the lower sealing rubber tube, and an annular sealing ring (7) is installed in each of the two sealing grooves; the two annular sealing rings (7) respectively abut against the upper sealing rubber tube and the lower sealing rubber tube on the two sides that are close to each other.

7. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that, The outer periphery of the telescopic sleeve (3) is also fitted with a support sleeve (8) and a guide sleeve; the support sleeve (8) is threaded with an adjusting nut (81); the support sleeve (8) is connected to the guide sleeve through the adjusting nut (81).

8. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that, A break rod (9) is also provided in the central tube (1); a shear pin is provided through the break rod (9) and the central tube (1), and one end of the break rod (9) extends into the nozzle connector (4).

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