Pressurizing device for coal bed gas exploitation well drilling

Abstract

The utility model discloses a pressurizing device for coalbed methane exploitation well drilling, and relates to the technical field of coalbed methane exploitation, the upper surface of a support is provided with a cleaning mechanism, the cleaning mechanism comprises an oil storage box arranged on the upper surface of the support, the upper surface of the oil storage box is provided with a cleaning ring, the inner side of the cleaning ring is symmetrically provided with air outlet holes, and the air outlet holes are communicated with the cleaning ring. An air pump is arranged on the upper surface of the support and located on one side of the oil storage box, a partition plate is arranged in the oil storage box, an oil well pump is installed on the upper surface of the partition plate, an oil outlet ring is arranged on the portion, above the partition plate, in the oil storage box, and spray heads are symmetrically arranged at the positions, close to the sleeve, of the inner side of the oil outlet ring. The upper end of the sleeve is further provided with a pipe cap, and the upper end of the pipe cap is connected with a pressurizing plate. And external air can be extracted through an air extracting pump in the cleaning mechanism, enters a cleaning ring through a connecting pipe and is sprayed outwards through an air outlet hole, and therefore the casing pipe for coal seam mining well drilling can be cleaned.

Description

Technical Field

[0001] This utility model relates to the field of coalbed methane extraction technology, and in particular to a pressurization device for coalbed methane drilling. Background Technology

[0002] Coalbed methane (CBM) is natural gas found in coal seams, primarily composed of methane. It is extracted through drilling to utilize energy and reduce the risk of coal mine disasters. There are generally two methods for CBM extraction: surface drilling and underground gas drainage systems. In surface drilling, after the CBM well is completed, a three-stage casing needs to be installed. To ensure proper installation, the casing needs to be pressurized.

[0003] Chinese patent discloses an auxiliary pressurization device for coalbed methane drilling (authorization announcement number CN219262292U). This patented technology, through the cooperative arrangement of a fixed turntable surface, connecting shaft, movable turntable surface, guide block, connecting frame, insertion rod, and sleeve block, makes the preliminary preparation work more convenient, saves time and effort, and facilitates the casing running operation. Through the cooperative arrangement of an oil storage tank, electric telescopic rod, connecting rod, sealing block, coating plate, through hole, and flow channel, it can effectively prevent wear between the casing and the movable and fixed turntable surfaces, ensuring the service life of related components. At the same time, it can also lubricate the casing during the running operation, making the running operation smoother.

[0004] However, most existing pressurized lubrication methods used in coalbed methane drilling involve directly applying a coating plate for lubrication. Since the casing is in contact with the outside, contamination can occur, affecting subsequent lubrication. As mentioned in the comparative document, a coating plate is used to coat the casing. In practical applications, when pressurizing the casing for lubrication, contamination on the outside prevents sufficient lubrication, resulting in poor lubrication and hindering coalbed methane extraction. Therefore, those skilled in the art provide a pressurized device for coalbed methane drilling to solve the problems mentioned in the background art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a pressurization device for coalbed methane drilling, which solves the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressurizing device for coalbed methane drilling, comprising: a casing and an external base. Support rods are symmetrically arranged on the upper surface of the base, and a support is connected to the upper end of each support rod. A cleaning mechanism is provided on the upper surface of the support, including an oil storage box on the upper surface of the support. A cleaning ring is provided on the upper surface of the oil storage box, and air outlets are symmetrically opened on the inner side of the cleaning ring. A suction pump is provided on one side of the oil storage box on the upper surface of the support. A partition is provided inside the oil storage box, and an oil pump is installed on the upper surface of the partition. An oil outlet ring is provided above the partition inside the oil storage box, and nozzles are symmetrically arranged on the inner side of the oil outlet ring near the casing.

[0007] The upper end of the sleeve is also provided with a pipe cap, and the upper end of the pipe cap is connected to a pressure plate. Hydraulic lifting rods are also symmetrically arranged on the upper surface of the base.

[0008] As a further technical solution of this utility model, two sets of connecting rods are symmetrically arranged on the lower surface of the pressure plate, and a fixing rod is fixed to one end of each of the two connecting rods. The telescopic end of the hydraulic lifting rod is connected to the lower end of the fixing rod.

[0009] As a further technical solution of this utility model, the air outlet end of the air pump is connected to a connecting pipe, and the inside of the cleaning ring is provided with an air outlet channel that communicates with the air outlet hole. One end of the connecting pipe communicates with the air outlet channel.

[0010] As a further technical solution of this utility model, at least thirty sets of air outlets are symmetrically arranged on the inner side of the cleaning ring, and the openings of the air outlets are inclined upwards.

[0011] As a further technical solution of this utility model, an oil filling pipe is provided on the outside of the oil storage box, the end of the oil filling pipe penetrates the lower surface of the partition, and an oil outlet pipe is also provided on the outside of the oil storage box.

[0012] As a further technical solution of this utility model, the oil inlet end of the oil pump is connected to an oil pumping pipe inside the oil storage box, and the oil outlet end of the oil pump is connected to an oil inlet pipe, one end of which is connected to an oil outlet ring.

[0013] This utility model provides a pressurization device for coalbed methane drilling, which has the following advantages compared with the prior art:

[0014] 1. This design provides a pressurizing device for coalbed methane drilling. An air pump in the cleaning mechanism draws in external air, which is then introduced into the cleaning ring through a connecting pipe and sprayed outwards through the vent. This effectively cleans the casing used in coalbed methane drilling, preventing external contamination from affecting subsequent oil lubrication. Simultaneously, the use of a nozzle to spray lubricating oil from the oil reservoir improves the lubrication effect on the casing, demonstrating good practicality.

[0015] 2. This design is a pressurizing device for coalbed methane drilling. The fixed rod is raised and lowered by two hydraulic lifting rods symmetrically arranged on the upper surface of the base. During the raising and lowering, the pressure plate connected to the connecting rod moves down to automatically apply pressure to the casing at the lower end of the pipe cap, so as to facilitate coalbed methane drilling. The structure is simple and the practicality is good. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a pressurization device for drilling in coalbed methane extraction.

[0017] Figure 2 This is a schematic diagram of the cleaning mechanism in a pressurizing device for coalbed methane drilling.

[0018] Figure 3 This is a schematic diagram of the internal structure of an oil storage box in a pressurization device for coalbed methane drilling.

[0019] Figure 4 This is a schematic diagram of the pressure plate in a pressurization device for coalbed methane drilling.

[0020] In the diagram: 1. Sleeve; 2. Base; 21. Support rod; 22. Support; 3. Cleaning mechanism; 31. Oil reservoir; 311. Oil filling pipe; 32. Cleaning ring; 321. Air outlet; 33. Air pump; 331. Connecting pipe; 34. Nozzle; 341. Oil outlet ring; 35. Baffle plate; 36. Oil pump; 361. Oil extraction pipe; 362. Oil inlet pipe; 4. Pressure plate; 41. Pipe cap; 42. Connecting rod; 43. Fixing rod; 44. Hydraulic lifting rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This utility model provides a technical solution for a pressurizing device for coalbed methane drilling: it includes a casing 1 and a base 2 installed on the outside. Support rods 21 are symmetrically arranged on the upper surface of the base 2. A support 22 is connected to the upper end of each support rod 21. A cleaning mechanism 3 is installed on the upper surface of the support 22. The cleaning mechanism 3 includes an oil storage box 31 installed on the upper surface of the support 22. A cleaning ring 32 is installed on the upper surface of the oil storage box 31. Air outlets 321 are symmetrically opened on the inner side of the cleaning ring 32. The upper surface of the support 22... An air pump 33 is provided on one side of the oil storage box 31. A partition 35 is provided inside the oil storage box 31. An oil pump 36 is installed on the upper surface of the partition 35. An oil outlet ring 341 is provided inside the oil storage box 31 above the partition 35. Spray nozzles 34 are symmetrically arranged on the inner side of the oil outlet ring 341 near the sleeve 1. This arrangement utilizes the air outlet 321 opened on the inner side of the cleaning ring 32 to clean the sleeve 1, thereby avoiding contamination on the outside of the sleeve 1 and affecting the spraying of lubricating oil.

[0023] The upper end of the sleeve 1 is also provided with a pipe cap 41, and the upper end of the pipe cap 41 is connected to a pressure plate 4. The upper surface of the base 2 is also symmetrically provided with hydraulic lifting rods 44. This setting uses hydraulic lifting rods 44 to move the pressure plate 4 downward through the fixed rod 43, thereby realizing the purpose of automatically pressurizing the sleeve 1 through the pipe cap 41, which is practical.

[0024] like Figure 4 As shown, two sets of connecting rods 42 are symmetrically arranged on the lower surface of the pressure plate 4. One end of each connecting rod 42 is fixed with a fixing rod 43. The telescopic end of the hydraulic lifting rod 44 is connected to the lower end of the fixing rod 43. This arrangement uses the fixing rod 43 to connect the two connecting rods 42. When the hydraulic lifting rod 44 is working, the fixing rod 43 will pass through the support 22 to make the pressure plate 4 move downward, thereby pressurizing the sleeve 1.

[0025] like Figure 2 and Figure 3 As shown, the air outlet of the air pump 33 is connected to a connecting pipe 331. The cleaning ring 32 has an air outlet channel that communicates with the air outlet 321. One end of the connecting pipe 331 communicates with the air outlet channel. At least thirty sets of air outlets 321 are symmetrically arranged on the inner side of the cleaning ring 32, and the openings of the air outlets 321 are inclined upwards. This arrangement allows the air pump 33 to draw in external air and enter the interior of the cleaning ring 32 through the connecting pipe 331. After entering, the air is sprayed out through the air outlets 321 to clean the pressurized sleeve 1.

[0026] like Figure 2 and Figure 3As shown, an oil filling pipe 311 is provided on the outside of the oil storage box 31. The end of the oil filling pipe 311 penetrates the lower surface of the partition 35. An oil outlet pipe is also provided on the outside of the oil storage box 31. The oil inlet end of the oil pump 36 is connected to the oil extraction pipe 361 inside the oil storage box 31, and the oil outlet end of the oil pump 36 is connected to the oil inlet pipe 362. One end of the oil inlet pipe 362 is connected to the oil outlet ring 341. This arrangement allows the oil pump 36 to extract the lubricating oil inside the oil storage box 31 through the oil extraction pipe 361, and after extraction, it enters the oil outlet ring 341 through the oil inlet pipe 362. Finally, it is sprayed outward through the nozzle 34 to spray oil onto the outside of the casing 1, so as to facilitate the lubrication work of coalbed methane mining.

[0027] The working principle of this utility model is as follows: When using the pressurizing device for coalbed methane drilling, the casing 1 to be pressurized is first passed through the support 22 and connected to the casing 1 with bolts. After connection, when pressurizing the casing 1, the two hydraulic lifting rods 44 on the base 2 work synchronously to raise and lower the fixed rod 43, which in turn moves the pressure plate 4 downward, thereby achieving the purpose of pressurizing the casing 1. During pressurization, the operation of the air pump 33 can also be used. External air can be drawn in and enter the interior of the cleaning ring 32 through the connecting pipe 331. After entering, it is sprayed out through the air outlet 321 to clean the pressurized casing 1. After cleaning, the lubricating oil inside the oil storage box 31 can be drawn in through the oil extraction pipe 361 by the oil pump 36 inside the oil storage box 31. After being drawn in, it enters the oil outlet ring 341 through the oil inlet pipe 362. Finally, it is sprayed out through the nozzle 34 to spray oil onto the outside of the casing 1 to facilitate the lubrication of coalbed methane mining.

[0028] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A pressurizing device for coal-bed methane production drilling, characterized by comprising: include: The sleeve (1) and the base (2) set on the outside are provided. The upper surface of the base (2) is symmetrically provided with support rods (21). The upper end of the support rods (21) is connected to the support (22). The upper surface of the support (22) is provided with a cleaning mechanism (3). The cleaning mechanism (3) includes an oil storage box (31) set on the upper surface of the support (22). The upper surface of the oil storage box (31) is provided with a cleaning ring (32). The inner side of the cleaning ring (32) is symmetrically opened. The support (22) has an air outlet (321). An air pump (33) is installed on the upper surface of the support (22) on one side of the oil storage box (31). A partition (35) is installed inside the oil storage box (31). An oil pump (36) is installed on the upper surface of the partition (35). An oil outlet ring (341) is installed inside the oil storage box (31) above the partition (35). Spray nozzles (34) are symmetrically arranged on the inner side of the oil outlet ring (341) near the sleeve (1). The upper end of the sleeve (1) is also provided with a pipe cap (41), and the upper end of the pipe cap (41) is connected to a pressure plate (4). The upper surface of the base (2) is also symmetrically provided with hydraulic lifting rods (44).

2. The pressurizing device for coal-bed gas drilling according to claim 1, wherein Two sets of connecting rods (42) are symmetrically arranged on the lower surface of the pressure plate (4). One end of each of the two connecting rods (42) is fixed with a fixing rod (43). The telescopic end of the hydraulic lifting rod (44) is connected to the lower end of the fixing rod (43).

3. The pressurizing device for coal-bed gas drilling according to claim 1, wherein The air pump (33) has a connecting pipe (331) connected to its outlet end. The cleaning ring (32) has an air outlet channel that communicates with the air outlet (321) inside. One end of the connecting pipe (331) communicates with the air outlet channel.

4. The pressurizing device for coal-bed gas drilling according to claim 1, wherein At least thirty sets of air vents (321) are symmetrically arranged on the inner side of the cleaning ring (32), and the openings of the air vents (321) are inclined upwards.

5. The pressurizing device for coal-bed gas drilling according to claim 1, wherein An oil filling pipe (311) is provided on the outside of the oil storage box (31), and the end of the oil filling pipe (311) penetrates the lower surface of the partition (35). An oil outlet pipe is also provided on the outside of the oil storage box (31).

6. The pressurizing device for coal-bed gas drilling according to claim 1, wherein The oil pump (36) has an oil inlet end connected to an oil pipe (361) inside the oil storage box (31), and the oil outlet end of the oil pump (36) is connected to an oil inlet pipe (362), one end of which is connected to an oil outlet ring (341).

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