Supersonic shock wave atomization drainage gas recovery device

Abstract

The invention relates to the technical field of natural gas extraction, and provides a supersonic shock wave atomization drainage gas recovery device. The supersonic shock wave atomization drainage gas recovery device comprises a center pipe, a connecting sleeve, a telescopic sleeve, a nozzle connector and a nozzle. A flow guide channel is formed in the center pipe, and an inlet and an outlet are formed in the two ends of the center pipe correspondingly. The connecting sleeve sleeves one end, provided with the inlet, of the central pipe; the telescopic sleeve sleeves one end, provided with the outlet, of the central pipe; the nozzle connector is mounted in the telescopic sleeve and is connected with an outlet of the central pipe; the nozzle is arranged at one end of the nozzle connector away from the central pipe; the central pipe is provided with at least one shock wave cavity in the flow guide channel; the shock wave cavity is formed in the end, close to the connecting sleeve, of the flow guide channel, and the shock wave cavity and the connecting sleeve are arranged in a spaced mode. The supersonic shock wave atomization drainage gas recovery device has the advantage of being high in atomization efficiency.

Description

Technical Field

[0001] This application relates to the field of natural gas extraction technology, and in particular 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] In view of this, this application provides a supersonic shock wave atomization drainage and gas collection device to solve the problem of relatively poor atomization efficiency in the existing supersonic atomization throttle device.

[0006] The supersonic shock wave atomization drainage and gas collection device provided in this application includes a central pipe, a connecting sleeve, a telescopic sleeve, a nozzle connector, and a nozzle.

[0007] The central tube has a flow channel inside, and an inlet and an outlet are respectively opened at both ends of the central tube;

[0008] The connecting sleeve is fitted onto the end of the central tube where the inlet is located.

[0009] The telescopic sleeve is fitted onto one end of the central tube where the outlet is located.

[0010] The nozzle connector is installed in the telescopic sleeve and connected to the outlet of the central tube;

[0011] The nozzle is located at the end of the nozzle connector that is away from the central tube;

[0012] The central tube is provided with at least one shock cavity in the guide channel;

[0013] The shock cavity is located at one end of the guide channel near the connecting sleeve and is spaced apart from the connecting sleeve.

[0014] When this supersonic shockwave 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 through the connecting sleeve. The speed of the gas flow in the central pipe is continuously increased. When the gas flow is about to reach the nozzle, the gas flow speed is increased to the critical state - that is, the local speed of sound. Due to the reduction of the nozzle cross-section, the gas flow expands and is accelerated to the supersonic state. The supersonic gas flow is continuously accelerated in the nozzle 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 natural gas is further broken down and reduced, thereby realizing the supersonic atomization effect. The atomized gas-liquid two-phase mixture is lifted through the pipeline to the wellhead for discharge, ultimately achieving the purpose of drainage and gas production.

[0015] Moreover, since the central pipe has at least one shock chamber in the guide channel, when the gas flows into the shock chamber, shock turbulence will be generated, so that the gas-liquid mixture in the natural gas can be initially sheared and broken in the shock chamber, thereby enabling the supersonic shock wave atomization drainage gas extraction device to have higher atomization efficiency.

[0016] In one possible design, the shock cavity is an annular cavity recessed toward the inner wall of the central tube.

[0017] In this way, when the gas flow moves along the central tube, the gas flow near the inner wall of the central tube can enter the shock cavity more fully to generate more shock turbulence, so that the gas-liquid mixture in the natural gas can be more fully sheared and broken.

[0018] In one possible design, the bottom wall of the shock cavity is also provided with a protrusion that protrudes toward the center of the guide channel;

[0019] The protrusion is smoothly connected to the bottom wall of the shock cavity.

[0020] When the high-speed airflow enters the shock cavity, it will collide further with the protrusion, thereby generating more shock turbulence in the shock cavity.

[0021] In one possible design, the distance between the shock cavity and the inlet of the central tube is denoted as L1, and L1 ≥ 40 mm.

[0022] In this way, when the airflow flows in from the inlet of the central tube, it will undergo initial stabilization and acceleration in the guide channel of the central tube, making the initial velocity of the airflow about to flow into the shock cavity relatively fast and stable.

[0023] In one possible design, the width of the shock cavity is denoted as L2, and L2 ≥ 5 mm.

[0024] The width of the shock cavity is limited to at least 5 mm to ensure that the airflow has enough time to generate shock turbulence in the shock cavity 1.

[0025] In one possible design, the depth of the shock cavity is denoted as L3, and L3 ≥ 3 mm.

[0026] The depth of the shock cavity is limited to at least 3 mm to ensure that the airflow can generate sufficiently strong shock turbulence in the shock wave.

[0027] In one possible design, a locking plate is provided on the outer periphery of the telescopic sleeve;

[0028] The slip is installed on the slip seat;

[0029] The telescopic sleeve and the slip are both equipped with a fixing ring, and one side of the slip abuts against one side of the telescopic sleeve.

[0030] This allows the supersonic shock wave atomization drainage gas extraction device to be stably installed and fixed when installed in the oil pipe, and it has better resistance to high pressure in the oil pipe.

[0031] In one possible design, the outer periphery of the central tube is provided with an upper sealing rubber sleeve and a lower sealing rubber sleeve spaced apart from each other;

[0032] The outer periphery of the central tube is 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.

[0033] The two annular sealing rings respectively abut against the upper sealing tube and the lower sealing tube on their respective sides that are close to each other.

[0034] This ensures that the supersonic shock wave atomization drainage gas extraction device has 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.

[0035] In one possible design, the outer periphery of the telescopic sleeve is further fitted with a support sleeve and a guide sleeve;

[0036] The support cylinder is fixed with a four-hole ring, and the internal thread of the support cylinder is fitted with an adjusting nut;

[0037] The support cylinder is connected to the guide sleeve via the adjusting nut.

[0038] This allows the relative position between the support cylinder and the guide sleeve to be adjusted by rotating the adjusting nut, thus facilitating lifting.

[0039] In one possible design, a break rod is also provided in the central tube, and a shear pin is provided through the break rod and the central tube together, with one end of the break rod extending into the nozzle connector.

[0040] After the supersonic shock wave atomization drainage and gas extraction device is installed, the sealing rubber sleeve can be recovered by breaking the rod, making it easy to reuse.

[0041] Other features and advantages of the embodiments of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the embodiments of this application. The objects and other advantages of the embodiments of this application are realized and obtained in accordance with the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0042] Figure 1 This is a front view of the supersonic shock wave atomization drainage gas collection device provided in the embodiments of this application;

[0043] Figure 2 A vertical sectional view of the supersonic shock wave atomization drainage gas collection device provided in the embodiments of this application;

[0044] Figure 3 for Figure 2 A vertical sectional view of the central tube in the middle;

[0045] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0046] Figure label:

[0047] 1-Center tube;

[0048] 11-Guide channel;

[0049] 12-Shock cavity;

[0050] 121 - Protrusion;

[0051] 2-Connecting sleeve;

[0052] 3-Telescopic sleeve;

[0053] 4- Nozzle connector;

[0054] 5- Nozzle;

[0055] 6-Fixing ring;

[0056] 7- Annular sealing ring;

[0057] 8-Support tube;

[0058] 81-Adjusting nut;

[0059] 9-Break-off rod.

[0060] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0061] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0062] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0063] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0064] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0065] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0066] The following describes a specific embodiment of the supersonic shock wave atomization drainage gas extraction device provided in the embodiments of this application.

[0067] like Figure 1 and Figure 2As shown in the figure, this application provides a supersonic shock wave atomization drainage and gas collection device, which includes a central pipe 1, a connecting sleeve 2, a telescopic sleeve 3, a nozzle connector 4, and a nozzle 5; the central pipe 1 has a guide channel 11 inside, and inlets and outlets are respectively opened at both ends of the central pipe 1; the connecting sleeve 2 is sleeved and installed at the end of the central pipe 1 where the inlet is opened; the telescopic sleeve 3 is sleeved and installed at the end of the central pipe 1 where the outlet is opened; the nozzle connector 4 is installed in the telescopic sleeve 3 and connected to the outlet of the central pipe 1; the nozzle 5 is located at the end of the nozzle connector 4 away from the central pipe 1; wherein, the central pipe 1 has at least one shock cavity 12 in the guide channel 11; the shock cavity 12 is located at the end of the guide channel 11 near the connecting sleeve 2 and is spaced apart from the connecting sleeve 2.

[0068] 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.

[0069] 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.

[0070] In an optional embodiment, the shock cavity 12 is an annular cavity recessed toward the inner wall of the central tube 1.

[0071] 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.

[0072] 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 can also be further added along the axial direction of the inner wall of the central tube 1.

[0073] 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.

[0074] Specifically, such as Figure 4 The bottom wall of the shock cavity 12 is provided with a protrusion 121 that protrudes towards the center of the guide channel 11. 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.

[0075] 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.

[0076] 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.

[0077] In an optional embodiment, the width of the shock cavity 12 is denoted as L2, and L2 ≥ 5mm.

[0078] 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.

[0079] In an optional embodiment, the depth of the shock cavity 12 is denoted as L3, and L3 ≥ 3 mm.

[0080] 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.

[0081] In an optional embodiment, a slip seat is provided on the outer periphery of the telescopic sleeve 3; a slip is installed on the slip seat; a fixing ring 6 is installed on both the telescopic sleeve 3 and the slip, and one side of the slip abuts against one side of the telescopic sleeve 3.

[0082] Specifically, such as Figure 2 As shown, by setting the slip seat, slips and fixing ring 6, the supersonic shock wave atomizing drainage gas collection device can be stably installed and fixed when installed on the oil pipe, and has better resistance to high pressure in the oil pipe.

[0083] 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.

[0084] 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.

[0085] In an optional embodiment, the outer periphery of the telescopic sleeve 3 is further fitted with a support sleeve 8 and a guide sleeve; a four-hole ring is fixed inside the support sleeve 8, and an adjusting nut 81 is threaded inside the support sleeve 8; the support sleeve 8 is connected to the guide sleeve through the adjusting nut 81.

[0086] Specifically, such as 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.

[0087] In an optional embodiment, a pull-off rod 9 is also provided in the central tube 1; a shear pin is provided through 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.

[0088] Specifically, such as 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.

[0089] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A supersonic shock wave atomization drainage and gas extraction device, characterized in that, include: A central tube (1) is provided with a flow channel (11) inside the central tube (1), and an inlet and an outlet are provided at both ends of the central tube (1); A connecting sleeve (2) is fitted onto one end of the central tube (1) where the inlet is located; Telescopic sleeve (3) is fitted onto one end of the central tube (1) where the outlet is located; The nozzle connector (4) is installed in the telescopic sleeve (3) and connected to the outlet of the central tube (1); The nozzle (5) is located at the end of the nozzle connector (4) away from the central tube (1); The central tube (1) is provided with at least one shock cavity (12) in the guide channel (11); The shock cavity (12) is located at one end of the guide channel (11) near the connecting sleeve (2) and is spaced apart from the connecting sleeve (2).

2. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that, The shock cavity (12) is an annular cavity recessed toward the inner wall of the central tube (1).

3. The supersonic shock wave atomization drainage and gas extraction device according to claim 2, characterized in that, 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); The protrusion (121) is smoothly connected to the bottom wall of the stimulated cavity (12).

4. 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.

5. 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.

6. 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.

7. The supersonic shock wave atomization drainage and gas extraction device according to claim 1, characterized in that, The telescopic sleeve (3) is provided with a slip seat on its outer periphery; The slip is installed on the slip seat; The telescopic sleeve (3) and the slip are both equipped with a fixing ring (6), and one side of the slip abuts against one side of the telescopic sleeve (3).

8. 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 provided with two sealing grooves between the upper sealing tube and the lower sealing 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 tube and the lower sealing tube on their respective sides that are close to each other.

9. The supersonic shock wave atomization drainage and gas extraction device according to claim 8, 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 cylinder (8) is fixed with a four-hole ring, and the support cylinder (8) is threaded with an adjusting nut (81); The support cylinder (8) is connected to the guide sleeve via the adjusting nut (81).

10. 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 both the pull rod (9) and the central tube (1), and one end of the pull rod (9) extends into the nozzle connector (4).

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