Wellhead pressure-bearing device

Abstract

The utility model discloses a wellhead pressure-bearing device, which comprises a pressure-bearing component, a pressure-bearing component, a pressure-bearing component and a pressure-bearing component, the pressure-bearing component comprises a sleeve and a drill rod joint, and the upper end face of the sleeve is fixedly connected with the drill rod joint; the adding part comprises a first sealing ring, a lower flange, a screw thread, an upper flange, a fixing rod, a threaded rod, a sleeve hole, a supporting sleeve and a nut; a first sealing ring is fixed to the surface of the sleeve in a sealed mode, a lower flange is fixedly connected to the surface of the first sealing ring, the surface of the sleeve is slidably sleeved with a screw thread, an upper flange is fixedly connected to the surface of the screw thread, and a fixing rod is fixedly connected to the upper end face of the lower flange. According to the utility model, the fixed rod, the upper flange, the lower flange and the sleeve are arranged, and the upper flange and the lower flange are connected through the fixed rod and the threads, so that the stability of the surface of the sleeve is ensured, the pressure can be borne by gradually starting the pump with small displacement, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wellhead pressure bearing, in particular to a wellhead pressure bearing device. Background Technique

[0002] The formation pressure of the oil wellhead in the oilfield is low. If a blowout preventer is not installed, it cannot carry out pressure-bearing plugging after well leakage occurs. Therefore, a wellhead pressure-bearing device is needed. In the prior art, there are related prior arts.

[0003] According to the search, the patent with the application number CN203879440U discloses related technologies. The anti-eccentric wear packing box of this device is composed of a compression cap, a compression ring, packing, a packing box body, packing box fixing screws, large gaskets and sealing gaskets. There is a flange at the bottom of the anti-eccentric wear packing box. The fixing holes of the flange are much larger than the diameter of the packing box fixing screws. The water drainage device is fixed on the wellhead casing flange through the lower flange. After the coal seam water is pumped out through the oil pipe in the well, it enters the central pipe of the water drainage device. Because the upper end of the central pipe is sealed by the anti-eccentric wear sealing box, the coal seam water can only pass through multiple longitudinal water grooves on the central pipe of the water drainage device and is discharged through the drain pipe at the bottom after buffering by the shell, so as to avoid the produced water directly impacting the packing.

[0004] The following deficiencies exist in the above scheme. The water drainage device is fixed on the wellhead casing flange through the lower flange. After the water is pumped out through the oil pipe in the well and enters the central pipe of the water drainage device, because the upper end of the central pipe is sealed by the anti-eccentric wear sealing box, but when plugging occurs in the pressure-bearing structure of this device, it is difficult to solve it, and it is easy for gas to disperse outward, not only resulting in gas loss but also affecting the working environment of the staff. Summary of the Invention

[0005] The purpose of the utility model is to provide a wellhead pressure-bearing device to solve the problem proposed in the above background technique that when plugging occurs in the pressure-bearing structure, it is difficult to solve it, and it is easy for gas to disperse outward, not only resulting in gas loss but also affecting the working environment of the staff.

[0006] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0007] The utility model is a wellhead pressure-bearing device, including:

[0008] A pressure-bearing component, the pressure-bearing component includes a casing and a drill pipe joint, and the upper end surface of the casing is fixedly connected with a drill pipe joint;

[0009] An adding component, the adding component includes a first sealing ring, a lower flange, a screw thread, an upper flange, a fixing rod, a threaded rod, a sleeve hole, a support sleeve and a nut;

[0010] A first sealing ring is fixedly sealed on the surface of the casing. A lower flange is fixedly connected to the surface of the first sealing ring. A screw thread is slidably sleeved on the surface of the casing. An upper flange is fixedly connected to the surface of the screw thread. A fixing rod is fixedly connected to the upper end surface of the lower flange. A threaded rod is fixedly connected to the upper end surface of the fixing rod. Sleeve holes are formed in the inner walls of both the upper flange and the lower flange.

[0011] Further, the diameter of the threaded rod is smaller than the sleeve hole in the inner wall of the upper flange, and the upper flange and the lower flange are arranged in a vertically opposite position.

[0012] Further, a support sleeve is fixedly connected to the surface of the fixing rod, and the lower end surface of the upper flange abuts against the upper end surface of the support sleeve.

[0013] Further, a nut is threadedly connected to the surface of the threaded rod, and the lower end surface of the nut presses against the upper end surface of the upper flange.

[0014] Further, the detection component includes an air storage tank, an alarm, a gas concentration detector, a second sealing gasket, a one-way valve, and a through hole;

[0015] An air storage tank is fixedly connected to the surface of the drill pipe joint. An alarm is fixedly installed on the inner wall of the air storage tank. A gas concentration detector is fixedly installed in the air storage tank. A second sealing gasket is fixedly connected to the upper end surface of the air storage tank. A one-way valve is fixedly installed in the air storage tank.

[0016] Further, a through hole is formed in the middle of the air storage tank, and the through hole is matched with the surface of the drill pipe joint until it reaches.

[0017] Compared with the prior art, the advantages of the present utility model are as follows:

[0018] First, the present utility model is provided with a fixing rod, an upper flange, a lower flange, and a casing. The device realizes the connection between the upper flange and the lower flange through the fixing rod and the thread, ensuring the stability on the surface of the casing, enabling the pump to be gradually started with a small displacement to carry out pressure bearing, and improving the practicability.

[0019] Second, based on the above beneficial effects, an alarm, a drill pipe joint, a gas concentration detector, a solenoid valve, and a drill pipe joint are provided. When the connection between the drill pipe joint and other structures is not in place and leakage occurs, the alarm can prompt the staff. Then, the internal concentration is checked by using the gas concentration detector, and the solenoid valve is started to transfer the leaked gas to other storage devices, and then the drill pipe joint is adjusted or repaired. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the whole of the present invention;

[0022] Figure 2 It is a three-dimensional schematic structural diagram of the gas storage tank of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the fixing rod of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the lower flange of the present invention.

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 1. Sleeve; 2. Lower flange; 3. First sealing ring; 4. Fixing rod; 5. Support sleeve; 6. Nut; 7. Threaded rod; 8. Upper flange; 9. Thread; 10. Drill pipe joint; 11. Gas storage tank; 12. Alarm; 13. Second gasket; 14. Gas concentration detector; 15. Through hole; 16. Check valve. Specific embodiments

[0027] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention in conjunction with the drawings.

[0028] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] To make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail in conjunction with the drawings.

[0030] Please refer to Figures 1-4 As shown, this embodiment is a wellhead pressure-bearing device, including:

[0031] A pressure-bearing component, the pressure-bearing component includes a sleeve 1 and a drill pipe joint 10, and the upper end surface of the sleeve 1 is fixedly connected with the drill pipe joint 10;

[0032] Adding components, including a first sealing ring 3, a lower flange 2, a thread 9, an upper flange 8, a fixing rod 4, a threaded rod 7, a sleeve hole, a support sleeve 5 and a nut 6;

[0033] The surface of the sleeve 1 is sealed and fixed with a first sealing ring 3, the surface of the first sealing ring 3 is fixedly connected with a lower flange 2, the surface of the sleeve 1 is slidably sleeved with a thread 9, the surface of the thread 9 is fixedly connected with an upper flange 8, the upper end surface of the lower flange 2 is fixedly connected with a fixing rod 4, the upper end surface of the fixing rod 4 is fixedly connected with a threaded rod 7, and the upper flange 8 and the inner wall of the lower flange 2 are both provided with sleeve holes;

[0034] Since the upper flange 8 and the lower flange 2 are arranged at opposite positions, and the hole distances between them correspond, the inner wall of the upper flange 8 can be sleeved on the surface of the threaded rod 7 to complete the assembly;

[0035] The diameter of the threaded rod 7 is smaller than the inner wall hole of the upper flange 8, and the upper flange 8 and the lower flange 2 are arranged in an upper and lower relative position;

[0036] The surface of the fixing rod 4 is fixedly connected with a supporting sleeve 5, and the lower end surface of the upper flange 8 overlaps the upper end surface of the supporting sleeve 5;

[0037] The support sleeve 5 supports the upper flange 8, making the upper flange 8 more stable when it is fixed on the surface of the rod 4;

[0038] The surface of the threaded rod 7 is threadedly connected with a nut 6, and the lower end surface of the nut 6 is pressed against the upper end surface of the upper flange 8;

[0039] Working principle: before lowering the drill tool, connect the welded lower flange with the surface casing 1, and put in a sealing ring. After lowering the drill tool to the corresponding working position, place the drill tool on the elevator, connect the upper flange short section to the drill pipe through the thread 9, and then connect it with the upper square drill pipe flange short section. If a top drive is used, a drill pipe can be connected to the upper part of the pressure-bearing tool. After tightening it with a hydraulic pliers, lift the drill tool, take out the elevator, and send the pressure-bearing tool to the surface casing 1. Make the upper and lower flanges of the pressure-bearing tool dock smoothly and connect and fix them with screws. Then gradually start the pump with a small displacement to bear pressure.

[0040] See also Figures 1-4 As shown, this embodiment is based on the above embodiment 1, and the detection component includes a gas storage tank 11, an alarm 12, a gas concentration detector 14, a second sealing gasket 13, a one-way valve 16 and a through hole 15;

[0041] A gas tank 11 is fixedly connected to the surface of the drill pipe joint 10, an alarm 12 is fixedly installed on the inner wall of the gas tank 11, a gas concentration detector 14 is fixedly installed in the gas tank 11, a second sealing gasket 13 is fixedly connected to the upper end surface of the gas tank 11, and a one-way valve 16 is fixedly installed in the gas tank 11;

[0042] A through hole 15 is provided in the middle of the gas storage tank 11, and the through hole 15 is matched with the surface of the drill pipe joint 10 until they are in alignment;

[0043] Working principle: Through the second sealing ring, the sealing performance between the drill pipe joint 10 and the gas equipment is improved. The alarm 12 can be used to determine whether the position is accurately corresponding during installation. When leakage occurs for some reason during use, the alarm 12 will give a prompt to the staff. Moreover, the gas concentration detector 14 can detect the gas concentration in the gas storage tank 11. When the solenoid valve is activated, the gas is transferred to a suitable container, reducing losses to a certain extent and facilitating subsequent inspection and repair.

[0044] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A wellhead pressure-bearing device, characterized in that, Comprising: A pressure-bearing component, the pressure-bearing component includes a casing (1) and a drill pipe joint (10), and the upper end surface of the casing (1) is fixedly connected to the drill pipe joint (10); An adding component, the adding component includes a first sealing ring (3), a lower flange (2), a screw thread (9), an upper flange (8), a fixing rod (4), a threaded rod (7), a sleeve hole, a support sleeve (5) and a nut (6); The surface of the casing (1) is hermetically fixed with a first sealing ring (3), the surface of the first sealing ring (3) is fixedly connected to the lower flange (2), the surface of the casing (1) is slidably sleeved with a screw thread (9), the surface of the screw thread (9) is fixedly connected to the upper flange (8), the upper end surface of the lower flange (2) is fixedly connected to the fixing rod (4), the upper end surface of the fixing rod (4) is fixedly connected to the threaded rod (7), and sleeve holes are formed in the inner walls of both the upper flange (8) and the lower flange (2).

2. The wellhead pressure-bearing device according to claim 1, characterized in that, The diameter of the threaded rod (7) is smaller than the sleeve hole in the inner wall of the upper flange (8), and the upper flange (8) and the lower flange (2) are arranged in a vertically opposite position.

3. The wellhead pressure-bearing device according to claim 1, characterized in that, The surface of the fixing rod (4) is fixedly connected to the support sleeve (5), and the lower end surface of the upper flange (8) abuts against the upper end surface of the support sleeve (5).

4. A wellhead pressure-bearing device according to claim 1, characterized in that, The surface of the threaded rod (7) is threadedly connected with a nut (6), and the lower end surface of the nut (6) presses against the upper end surface of the upper flange (8).

5. The wellhead pressure-bearing device according to claim 1, characterized in that, It further includes a detection component, the detection component includes an air storage tank (11), an alarm (12), a gas concentration detector (14), a second gasket (13), a one-way valve (16) and a through hole (15); The surface of the drill pipe joint (10) is fixedly connected to the air storage tank (11), an alarm (12) is fixedly installed on the inner wall of the air storage tank (11), a gas concentration detector (14) is fixedly installed in the air storage tank (11), a second gasket (13) is fixedly connected to the upper end surface of the air storage tank (11), and a one-way valve (16) is fixedly installed in the air storage tank (11).

6. The wellhead pressure-bearing device according to claim 5, characterized in that, A through hole (15) is formed in the middle of the air storage tank (11), and the through hole (15) is until it matches the surface of the drill pipe joint (10).

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