Orifice blowout preventer for coal mine drilling

Abstract

The utility model relates to a blowout preventer, and provides an orifice blowout preventer for coal mine drilling, which comprises a tee joint, an in-hole pipe connected with the tee joint, a sleeve arranged at one end, far away from the in-hole pipe, of the tee joint, and a bearing arranged in the sleeve, the drill rod penetrates through the bearing. The orifice blowout preventer for coal mine drilling can effectively reduce abrasion of the drill rod to the pipe in the hole in the drilling process.

Description

Technical Field

[0001] The utility model relates to the technical field of blowout preventers, in particular to a borehole blowout preventer for coal mine drilling. Background Art

[0002] During coal mining, due to the complex geology, some coal seams contain a lot of gas or water, which affects the normal mining of coal mines. Therefore, it is necessary to drill holes to extract gas or discharge water before coal mining. However, during the drilling process, gas blowouts may occur at the drilling site, causing safety accidents. Therefore, blowout prevention devices are generally installed at the drilling site.

[0003] Common blowout prevention devices are mainly composed of a tee and an in-hole tube, wherein the in-hole tube is used to be installed in the drill hole, and the drill rod passes through the tee and the in-hole tube in turn before drilling. A blowout prevention mechanism is provided in the tee, and the other end of the tee is used for slag discharge.

[0004] However, in actual use, problems such as drill rod falling off, eccentricity or shaking, serious wear of the inner tube of the hole by the drill rod and frequent replacement of the inner tube of the hole may occur during the drilling process, which not only increases the production cost but also reduces the production efficiency. Therefore, a blowout prevention device that can better prevent the wear of the inner tube of the hole can be designed. Utility Model Content

[0005] The utility model aims to provide a borehole blowout prevention device for coal mine drilling, which can effectively reduce the wear of the drill rod on the inner tube of the hole during the drilling process.

[0006] The embodiment of the utility model is realized through the following technical scheme: the orifice blowout prevention device for coal mine drilling of the utility model comprises a tee, an inner hole tube connected to the tee, a sleeve arranged at one end of the tee away from the inner hole tube, and a bearing arranged in the sleeve; the drill rod is arranged through the bearing.

[0007] Furthermore, a sealing gasket is provided between the sleeve and the bearing.

[0008] Furthermore, the tee is detachably connected to the inner tube of the hole.

[0009] Furthermore, the tee is connected to the inner tube of the hole via a flange, and a clamp is provided at the flange.

[0010] Furthermore, it also includes a fixer connected to the tee; the fixer includes a fixing piece connected to the drill clamp, and a connecting piece connected to the fixing piece; the connecting piece is connected to the tee.

[0011] Furthermore, the connecting piece is detachably connected to the tee.

[0012] Furthermore, the connecting member includes a connecting block connected to the fixing member, a screw rod slidably connected to the connecting block, a nut threadedly connected to the screw rod, and a fastening bolt threadedly connected to the connecting block; the nut is fixedly connected to the tee; and the fastening bolt abuts against the screw rod.

[0013] Furthermore, the fixing member includes a strong magnet connected to the connecting block.

[0014] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects: the orifice blowout prevention device for coal mine drilling of the utility model, when in use, inserts the inner hole tube into the drill hole, and then drills after the drill rod passes through the bearing and the inner hole tube. During the drilling process, when the drill rod falls off or deviates from the center, the bearing can limit the drill rod and limit the deviation of the drill rod within a certain range, which can effectively avoid the wear problem of the inner hole tube caused by the deviated drill rod and can effectively reduce the replacement frequency of the inner hole tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic structural diagram of a borehole blowout prevention device for coal mine drilling provided in an embodiment of the utility model.

[0017] Icons: 11-inner tube of hole, 12-tee, 13-flange, 14-sleeve, 15-bearing, 21-strong magnet, 22-connecting block, 23-fastening bolt, 24-screw, 25-nut. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 a limitation on the present invention.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example

[0024] The following is further described in conjunction with specific embodiments. Figure 1 As shown, the orifice blowout prevention device for coal mine drilling of this embodiment comprises a tee 12, an inner hole tube 11 connected to the tee 12, a sleeve 14 arranged at one end of the tee 12 away from the inner hole tube 11, and a bearing 15 arranged in the sleeve 14; the drill rod is arranged through the bearing 15. Specifically, when in use, the inner hole tube 11 is inserted into the drill hole, and then the drill rod is passed through the bearing 15 and the inner hole tube 11 to perform drilling. During the drilling process, when the drill rod is dropped or deviated, the bearing 15 can limit the drill rod, and can limit the deviation of the drill rod within a certain range, which can effectively avoid the wear problem of the inner hole tube 11 caused by the deviated drill rod, and can effectively reduce the replacement frequency of the inner hole tube 11.

[0025] In this embodiment, a sealing gasket is provided between the sleeve 14 and the bearing 15. Specifically, the sealing gasket can not only better buffer the vibration of the bearing 15 received by the drill pipe, but also improve the stability of the fixing of the bearing 15.

[0026] The tee 12 in this embodiment is detachably connected to the inner tube 11. The tee 12 is connected to the inner tube 11 through a flange 13, and a clamp is provided at the flange 13. Specifically, when the distance between the drilling rig and the borehole is small and it is difficult to install the tee 12 and the inner tube 11, the two can be separated, the inner tube 11 is installed first, and then the tee 12 is connected to the inner tube 11 through the flange 13 and the clamp, which can better adapt to various operating environments.

[0027] In this embodiment, a fixing device connected to the tee 12 is also included; the fixing device includes a fixing member connected to the drill clamp, and a connecting member connected to the fixing member; the connecting member is connected to the tee 12. The connecting member is detachably connected to the tee 12. The connecting member includes a connecting block 22 connected to the fixing member, a screw 24 slidably connected to the connecting block 22, a nut 25 threadedly connected to the screw 24, and a fastening bolt 23 threadedly connected to the connecting block 22; the nut 25 is fixedly connected to the tee 12; the fastening bolt 23 abuts against the screw 24. The fixing device includes a strong magnet 21 connected to the connecting block 22. Specifically, the tee 12 can be better restricted by the fixing device, thereby improving the fixing stability of the tee 12 and the inner tube 11 of the hole. It can be achieved by fixing the strong magnet 21 on the drill clamp, and then passing the screw 24 through the connecting block 22 and the nut 25, and after determining the position, using the fastening bolt 23 to fix the screw 24 to the connecting block 22. In this way, the strong magnet 21 can be used to hold the tee 12 to prevent it from shaking or trembling during operation, and fixing and disassembly are very convenient, which can achieve quick loading and unloading and simpler storage.

[0028] In summary, the orifice blowout prevention device for coal mine drilling in this embodiment, when in use, inserts the inner hole tube 11 into the borehole, and then passes the drill rod through the bearing 15 and the inner hole tube 11 to perform drilling. During the drilling process, when the drill rod falls off or deviates from the center, the bearing 15 can limit the drill rod and limit the deviation of the drill rod within a certain range, which can effectively avoid the wear problem of the inner hole tube 11 caused by the deviated drill rod and can effectively reduce the replacement frequency of the inner hole tube 11.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blowout prevention device for coal mine drilling, characterized in that: It comprises a tee (12), an inner hole tube (11) connected to the tee (12), a sleeve (14) arranged at one end of the tee (12) away from the inner hole tube (11), and a bearing (15) arranged in the sleeve (14); The drill rod is arranged through the bearing (15).

2. The orifice blowout prevention device for coal mine drilling according to claim 1, characterized in that: A sealing gasket is provided between the sleeve (14) and the bearing (15).

3. The orifice blowout prevention device for coal mine drilling according to claim 1, characterized in that: The tee (12) is detachably connected to the inner tube (11) of the hole.

4. The orifice blowout prevention device for coal mine drilling according to claim 3 is characterized in that: The tee (12) is connected to the inner tube (11) via a flange (13), and a clamp is provided at the flange (13).

5. The orifice blowout prevention device for coal mine drilling according to claim 1, characterized in that: It also includes a fixer connected to the tee (12); the fixer includes a fixing piece connected to a drilling rig clamp, and a connecting piece connected to the fixing piece; the connecting piece is connected to the tee (12).

6. The orifice blowout prevention device for coal mine drilling according to claim 5, characterized in that: The connecting piece is detachably connected to the tee (12).

7. The orifice blowout prevention device for coal mine drilling according to claim 6, characterized in that: The connecting member comprises a connecting block (22) connected to the fixing member, a screw rod (24) slidably connected to the connecting block (22), a nut (25) threadedly connected to the screw rod (24), and a fastening bolt (23) threadedly connected to the connecting block (22); The nut (25) is fixedly connected to the tee (12); the fastening bolt (23) is in abutment with the screw rod (24).

8. The orifice blowout prevention device for coal mine drilling according to claim 7, characterized in that: The fixing member comprises a strong magnet (21) connected to the connecting block (22).

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