Coalbed gas drainage and mining pipe column structure

Abstract

The utility model discloses a coalbed methane drainage and mining pipe column structure which comprises a production casing pipe, an oil pipe column arranged in the production casing pipe, and a tail pipe, a screen pipe, a desilting pipe and a plugging piece which are sequentially connected to the lower end of the oil pipe column, and further comprises a cleaning assembly used for cleaning the screen pipe, and the cleaning assembly comprises a telescopic rod, a C-shaped piece, a rotating ring and bristles; the telescopic rods are evenly and fixedly arranged on the side face of the tail pipe. The lower end of each telescopic rod is provided with a C-shaped piece, the upper side and the lower side of the inner side of an opening of each C-shaped piece are each provided with a sliding groove, and each C-shaped piece is further provided with a driving piece. The rotating ring coaxially and movably sleeves the outer side of the tail pipe, embedded rings are arranged on the upper ring surface and the lower ring surface of the rotating ring, the embedded rings are correspondingly and movably embedded in the sliding grooves, a first gear is coaxially and fixedly arranged on the outer ring surface of the rotating ring, and the driving part is in meshed connection with the first gear and drives the first gear to drive the rotating ring to rotate. In conclusion, the cleaning device has the advantages of novel structure, convenience in use, high cleaning efficiency, good cleaning effect and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas production equipment, and particularly relates to a coal bed gas production pipe column structure. Background Art

[0002] The coalbed methane drainage string is a key component used for drainage operations in coalbed methane wells. Its design and use are crucial to improving the development efficiency and economic benefits of coalbed methane. The ratio of water and gas production in coalbed methane wells will change at different production stages, so the design of the drainage string needs to be able to adapt to this change to ensure that drainage operations can be carried out effectively at different stages.

[0003] The screen of the coalbed methane production string is used to filter solid particles in the downhole fluid to prevent these particles from damaging pumps and other equipment. The design of the screen usually takes into account the specific conditions of the coalbed methane well, such as the characteristics of the coal seam, the properties of the downhole fluid, etc., to ensure that the screen can effectively perform its function. In the design of the coalbed methane well production string, the selection and design of the screen is a very important part.

[0004] However, during use, due to the influence of impurities such as dust in the collected gas, the gas permeability of the screen pipe gradually decreases, which reduces the efficiency of gas extraction, so the screen pipe needs to be cleaned. Patent CN219139032U discloses a coalbed methane well extraction pipe column structure, which cleans the screen pipe by moving the annular scraper up and down. However, the cleaning is only performed by moving up and down, which is inefficient and has a poor cleaning effect. Utility Model Content

[0005] In view of the above-mentioned problems, the purpose of the utility model is to provide a coalbed methane drainage pipe column structure, which can perform all-round cleaning of the screen pipe during the gas drainage process to prevent dust and impurities from clogging the screen pipe and affecting the gas drainage efficiency.

[0006] The technical solution of the utility model is: a coalbed methane drainage pipe string structure, including a production casing, an oil pipe string arranged inside the production casing, and a tail pipe, a screen pipe, a sand settling pipe and a plugging member connected to the lower end of the oil pipe string in sequence, and also includes a cleaning component for cleaning the screen pipe, the cleaning component includes:

[0007] A plurality of telescopic rods are evenly and fixedly arranged on the side of the tail pipe;

[0008] A C-shaped member, wherein the lower end of each telescopic rod is provided with a C-shaped member, and the upper and lower sides of the inner side of the opening of each C-shaped member are respectively provided with a slide groove, and the C-shaped member is also provided with a driving member;

[0009] A swivel, coaxially and movably sleeved on the outside of the tail pipe, the upper and lower ring surfaces of the swivel are both provided with embedded rings, the embedded rings are respectively and movably embedded in the slide grooves, and the driving member is connected to the swivel for driving the swivel to rotate;

[0010] The bristles are evenly arranged on the inner side of the rotating ring.

[0011] Furthermore, a first gear is coaxially fixedly disposed on the outer ring surface of the rotating ring, and the driving member is meshingly connected with the first gear and drives the first gear to drive the rotating ring to rotate.

[0012] Furthermore, the driving member comprises:

[0013] Two bearings are respectively arranged at the upper and lower sides of the C-shaped member;

[0014] A rotating shaft, rotatably connected and arranged between the two bearings;

[0015] A second gear is coaxially fixedly sleeved on the rotating shaft, and the second gear is meshed with the first gear

[0016] The driving motor is fixedly arranged below the C-shaped member, and the driving shaft of the driving motor is coaxially fixedly connected with the rotating shaft.

[0017] Furthermore, balls are evenly embedded on the side surfaces of the embedded ring that are in contact with the slide groove.

[0018] Furthermore, it also includes a control component arranged on the tail pipe, and the control component includes:

[0019] A monitoring component, embedded on the inner wall of the tail pipe, for monitoring the pressure parameters in the oil pipe string;

[0020] A controller is arranged on the outer side wall of the tail pipe, and the controller is connected with the telescopic rod, the driving motor and the monitoring component, and is used to control the operating states of the telescopic rod and the driving motor respectively according to the monitoring parameters.

[0021] Furthermore, the controller is integrated with a remote communication module for external remote control of the controller.

[0022] Furthermore, the bristles include:

[0023] Upper bristles are evenly arranged on the upper part of the inner side of the rotating ring in a circumferential direction, and the upper bristles are inclined toward the upper part of the rotating ring;

[0024] The lower bristles are evenly arranged in a circumferential direction on the lower part of the inner side surface of the rotating ring, and the lower bristles are inclined toward the lower side of the rotating ring.

[0025] The working method of the utility model is as follows: during the gas drainage and production process, dust and impurities in the collected gas are intercepted by the screen tube. After a period of interception, the dust and impurities will block the mesh of the screen tube, affecting the efficiency of gas drainage and production. At this time, the gas flow in the oil pipe column is reduced and the pressure becomes smaller. The monitoring component transmits the monitored pressure parameters to the controller. The controller controls the extension of the telescopic rod to move the swivel from the outer side of the upper end of the screen tube to the outer side of the lower end of the screen tube, and then resets. During the movement, the driving component drives the swivel to rotate forward or reversely, and uses the bristles to clean the mesh of the screen tube in all directions to prevent dust and impurities from clogging the screen tube and affecting the efficiency of gas drainage and production. In addition, external staff can also remotely control the controller to perform cleaning actions through remote control.

[0026] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a coalbed methane drainage pipe column structure, by arranging a cleaning component on the outside of the screen pipe, driving the swivel to move up and down on the outside of the screen pipe through a telescopic rod, and arranging bristles on the inside of the swivel, the mesh of the screen pipe is cleaned in the process of the swivel moving up and down, and a driving member is also arranged, which can drive the swivel to rotate while the swivel moves up and down, and can not only clean the screen pipe up and down, but also clean the screen pipe from the circumferential direction. In short, the utility model has the advantages of novel structure, convenient use, high cleaning efficiency, good cleaning effect, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 yes Figure 1 A magnified view of part A;

[0029] Figure 3 It is a schematic diagram of the connection structure between the C-shaped member and the swivel of the utility model;

[0030] Figure 4 It is a schematic diagram of the bristle structure of the utility model.

[0031] Among them, 1-production casing, 2-oil tubing string, 3-tail pipe, 4-screen pipe, 5-sand settling pipe, 6-cleaning component, 61-telescopic rod, 62-C-shaped part, 621-chute, 622-driving part, 6221-bearing, 6222-rotating shaft, 6223-second gear, 6224-driving motor, 63-swivel, 631-embedded ring, 6311-ball, 632-first gear, 64-bristles, 641-upper bristles, 642-lower bristles, 7-control component, 71-controller. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 To the attached Figure 4, the specific implementation methods of the utility model are described in detail. In the description of the utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0034] It should be noted that the circuit connections involved in the present invention all adopt conventional circuit connection methods and do not involve any innovation.

[0035] Example: Figure 1 As shown, a coalbed methane drainage pipe string structure includes a production casing 1, an oil pipe string 2 arranged inside the production casing 1, and a tail pipe 3, a screen pipe 4, a sand settling pipe 5 and a plugging member connected to the lower end of the oil pipe string 2 in sequence, and also includes a cleaning component 6 for cleaning the screen pipe 4. Among them:

[0036] like Figure 2 As shown, the cleaning assembly 6 includes a telescopic rod 61, a C-shaped member 62, a swivel 63 and bristles 64; a plurality of telescopic rods 61 are evenly fixedly arranged on the side of the tail pipe 3; a C-shaped member 62 is provided at the lower end of each telescopic rod 61, as shown in FIG. Figure 3As shown, each C-shaped member 62 has a slide groove 621 on the upper and lower sides of the inner side of the opening, and a driving member 622 is also provided on the C-shaped member 62; the swivel 63 is coaxially movably sleeved on the outer side of the tail pipe 3, and the upper and lower ring surfaces of the swivel 63 are provided with embedded rings 631, and the embedded rings 631 are respectively and movably embedded in the slide groove 621, and the sides of the embedded ring 631 contacting the slide groove 621 are evenly embedded with balls 6311, and the driving member 622 is connected to the swivel 63 to drive the swivel 63 to rotate, and the outer ring surface of the swivel 63 is coaxially fixed with a first gear 632, and the driving member 622 is meshed and connected with the first gear 632, and drives the first gear 63 2 drives the rotating ring 63 to rotate, and the driving member 622 includes two bearings 6221, a rotating shaft 6222, a second gear 6223 and a driving motor 6224; the two bearings 6221 are respectively arranged on the upper and lower sides of the C-shaped member 62; the rotating shaft 6222 is rotatably connected and arranged between the two bearings 6221; the second gear 6223 is coaxially fixedly sleeved on the rotating shaft 6222, and the second gear is meshed with the first gear 632; the driving motor 6224 is fixedly arranged below the C-shaped member 62, and the driving shaft of the driving motor 6224 is coaxially fixedly connected with the rotating shaft 6222; the bristles 64 are evenly arranged on the inner side of the rotating ring 63, as shown in FIG. Figure 4 As shown, the bristles 64 include upper bristles 641 and lower bristles 642; the upper bristles 641 are evenly arranged on the upper part of the inner side of the rotating ring 63, and the upper bristles 641 are inclined toward the top of the rotating ring 63; the lower bristles 642 are evenly arranged on the lower part of the inner side of the rotating ring 63, and the lower bristles 642 are inclined toward the bottom of the rotating ring 63.

[0037] The control component 7 is arranged on the tail pipe 3, and the control component 7 includes a monitoring component and a controller 71; the monitoring component is embedded in the inner wall of the tail pipe 3, and is used to monitor the pressure parameters in the oil pipe string 2; the controller 71 is arranged on the outer wall of the tail pipe 3, and the controller 71 is connected with the telescopic rod 61, the driving motor 6224 and the monitoring component, and is used to control the operating status of the telescopic rod 61 and the driving motor 6224 according to the monitoring parameters; a remote communication module is integrated on the controller 71 for external remote control of the controller 71.

[0038] The working method of the above embodiment is: in the process of gas drainage, the dust and impurities in the collected gas are intercepted by the screen tube 4. After a period of interception, the dust and impurities will block the mesh of the screen tube 4, affecting the efficiency of gas drainage. At this time, the gas flow in the oil pipe column 2 is reduced and the pressure becomes smaller. The monitoring component transmits the monitored pressure parameters to the controller 71. The controller 71 controls the extension of the telescopic rod 61 to move the swivel 63 from the outer side of the upper end of the screen tube 4 to the outer side of the lower end of the screen tube 4, and then reset. During the movement, the driving component 622 drives the swivel 63 to rotate forward or reverse, and uses the bristles 64 to clean the mesh of the screen tube 4 in all directions to prevent dust and impurities from clogging the screen tube 4 and affecting the efficiency of gas drainage. In addition, external staff can also remotely control the controller 71 to perform cleaning actions through remote control.

[0039] The specific models of the above electronic components are not specially specified, and ordinary products available on the market can be selected as long as they can meet the use requirements of the utility model.

[0040] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A coalbed methane drainage pipe string structure, comprising a production casing (1), an oil pipe string (2) arranged inside the production casing (1), and a tail pipe (3), a screen pipe (4), a sand settling pipe (5) and a plugging member connected to the lower end of the oil pipe string (2) in sequence, characterized in that: It also includes a cleaning assembly (6) for cleaning the screen tube (4), the cleaning assembly (6) comprising: A plurality of telescopic rods (61) are evenly and fixedly arranged on the side of the tail pipe (3); A C-shaped member (62), wherein the lower end of each telescopic rod (61) is provided with a C-shaped member (62), and the upper and lower sides of the inner side of the opening of each C-shaped member (62) are respectively provided with a slide groove (621), and the C-shaped member (62) is also provided with a driving member (622); A rotating ring (63) is coaxially movably sleeved on the outer side of the tail pipe (3); the upper and lower ring surfaces of the rotating ring (63) are both provided with embedded rings (631); the embedded rings (631) are respectively and movably embedded in the slide grooves (621); the driving member (622) is connected to the rotating ring (63) and is used to drive the rotating ring (63) to rotate; The bristles (64) are evenly arranged on the inner side surface of the rotating ring (63).

2. A coalbed methane drainage pipe column structure according to claim 1, characterized in that: A first gear (632) is coaxially fixedly disposed on the outer ring surface of the rotating ring (63), and the driving member (622) is meshingly connected with the first gear (632) and drives the first gear (632) to drive the rotating ring (63) to rotate.

3. A coalbed methane drainage pipe column structure according to claim 2, characterized in that: The driving member (622) comprises: Two bearings (6221) are respectively arranged at the upper and lower sides of the C-shaped member (62); A rotating shaft (6222) is rotatably connected and arranged between the two bearings (6221); The second gear (6223) is coaxially fixedly sleeved on the rotating shaft (6222), and the second gear is meshed with the first gear (632). The driving motor (6224) is fixedly arranged below the C-shaped member (62), and the driving shaft of the driving motor (6224) is coaxially fixedly connected to the rotating shaft (6222).

4. A coalbed methane drainage pipe column structure according to claim 1, characterized in that: Balls (6311) are evenly embedded on the side of the embedded ring (631) that contacts the slide groove (621).

5. A coalbed methane drainage pipe column structure according to claim 1, characterized in that: It also includes a control component (7) arranged on the tail pipe (3), and the control component (7) includes: A monitoring component, embedded in the inner wall of the tail pipe (3), and used for monitoring the pressure parameters in the oil pipe string (2); A controller (71) is arranged on the outer side wall of the tail pipe (3); the controller (71) is connected to the telescopic rod (61), the drive motor (6224) and the monitoring component, and is used to control the operating states of the telescopic rod (61) and the drive motor (6224) according to the monitoring parameters.

6. A coalbed methane drainage pipe column structure according to claim 5, characterized in that: The controller (71) is integrated with a remote communication module for external remote control of the controller (71).

7. A coalbed methane drainage pipe column structure according to claim 1, characterized in that: The bristles (64) include: Upper bristles (641) are evenly arranged in a circumferential direction on the upper portion of the inner side surface of the rotating ring (63), and the upper bristles (641) are inclined toward the upper side of the rotating ring (63); The lower bristles (642) are evenly arranged in a circumferential direction at the lower part of the inner side surface of the rotating ring (63), and the lower bristles (642) are inclined toward the bottom of the rotating ring (63).

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