Gas channeling prevention device for oil extraction wellhead

Abstract

The utility model discloses an oil extraction wellhead anti-gas-channeling device, which relates to the technical field of wellhead anti-gas-channeling, and comprises a wellhead pipe, a casing head arranged on the top surface, a working device fixedly connected with the top surface of the casing head, and an exhaust pipe arranged on one side of the surface. The motor is used for enabling the transmission gear to rotate to drive the lifting block to ascend and descend, gear teeth on the surface of the transmission gear are locally designed, the lifting block achieves intermittent movement, and the lifting block is driven to ascend and descend through elastic force given by the spring arranged on the surface of the sliding rod while intermittent movement is achieved. At the moment, the bottom working disc also enables the insertion column to be located in the circulation opening for intermittent closing and opening due to intermittent movement, so that gas accumulated at the bottom of the working device is gradually and effectively discharged during discharging work, and the situation that a discharging pipe is damaged by expanded gas due to one-time overturning of other devices is avoided; the stability of gas emission is improved, and potential safety hazards are reduced to the minimum.

Description

Technical Field

[0001] The utility model relates to the technical field of wellhead gas channeling prevention, in particular to an oil production wellhead gas channeling prevention device. Background Art

[0002] Wellhead equipment refers to the Christmas tree, tubing head, casing head and related accessories. It is an oil production equipment used for suspension, support, control and adjustment. As an important equipment for oil and gas production, its performance is related to whether the oil and gas wells can be produced safely and efficiently. A lot of research and development has been carried out both at home and abroad, but there is still a gap between the wellhead equipment at home and abroad and the international level. This article introduces the composition, installation position, working principle and function of the casing head, tubing head and Christmas tree respectively.

[0003] After searching, the applicant found that a Chinese patent disclosed "a device for preventing gas channeling at the wellhead of carbon dioxide-driven oil production", and its publication number is "CN220849615U", which includes an oil production wellhead and a connecting tube sleeved on the top of the oil production wellhead, a circular hole 1 is opened on the top of the connecting tube, a pipe 1 is connected to the circular hole 1, a fixing plate is fixedly set on the upper part of the inner wall of the pipe 1, a circular hole 2 is opened in the middle position of the fixing plate, a connecting rod passes through the circular hole 2, a connecting block 1 is fixedly set on the upper end of the connecting rod, and a connecting block 2 is fixedly set on the lower end of the connecting rod. The utility model adopts a device for preventing gas channeling at the wellhead of carbon dioxide-driven oil production using the above structure, and the whole process adopts automatic pressure relief, with low labor intensity, high efficiency and improved safety;

[0004] The above-mentioned device as a whole has a one-time pressure relief effect when working at the wellhead. However, in actual use, due to the long-term collection or long-term storage of the import at the wellhead, a large amount of gas is accumulated inside, which has the tendency to expand. If the gas inside the oil well is overturned and the pressure is released at one time, the pipeline for transmitting the gas will be damaged internally by the instantaneous movement of the expanding gas, and may even rupture, causing the internal depressurized gas to leak. Utility Model Content

[0005] The utility model aims to provide an anti-gas channeling device for an oil wellhead, so as to solve the problem proposed in the above-mentioned background technology that a large amount of gas is accumulated inside the wellhead due to long-term collection or long-term storage of the import, which has the property of expansion. If the gas inside the oil well is overturned and depressurized at one time, the pipeline for transmitting the gas will be damaged internally by the instantaneous movement of the expanding gas, and even rupture will occur, causing the internal depressurized gas to leak.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil wellhead gas channeling prevention device, comprising a wellhead pipe and a casing head provided on the top surface, a working device fixedly connected to the top surface of the casing head, and an exhaust pipe provided on one side of the surface, both sides of the inner wall of the working device are commonly fixedly connected with an anti-channeling plate that can isolate gas and use transmission to achieve gradual pressure relief, the top of the anti-channeling plate is provided with a lifting block that uses lifting to achieve a gradual pressure relief effect, both sides of the inner wall of the working device are provided with motors that can drive the lifting block, and the bottom surface of the lifting block is fixedly connected with a working disk that cooperates with the anti-channeling plate to relieve pressure.

[0007] Preferably, the anti-channeling plate is fixedly connected to two sides of the inner wall of the working device, and the inner wall of the anti-channeling plate is provided with a plurality of flow openings.

[0008] Preferably, the lifting block is arranged on the top of the anti-channeling plate, and a fixing groove is opened inside the lifting block.

[0009] Preferably, the lifting block is fixedly connected to a fixed block on the top surface of the fixed groove, and the fixed block and the top surface of the working device are jointly fixedly connected to a sliding rod, and the bottom end of the sliding rod passes through the interior of the fixed block and is slidably connected to the inner wall of the fixed groove.

[0010] Preferably, a spring is provided on the top surface of the inner wall of the working device and an opposite surface of the fixed block, and the spring is sleeved on the rod wall of the sliding rod.

[0011] Preferably, a rack is provided on one side of the surface of the lifting block, and limiting blocks are fixedly connected to both sides of the surface of the lifting block located on the rack, and a connecting rod is fixedly connected to the bottom surface of the lifting block.

[0012] Preferably, a receiving block is fixedly connected to one side of the inner wall of the working device, the motor is fixedly connected to the top surface of the receiving block, the output end of the motor is fixedly connected to a rotating shaft, and one end of the rotating shaft is rotatably connected to one side of the inner wall of the working device, and a transmission gear is provided on one side of the surface of the rotating shaft.

[0013] Preferably, the gear teeth on the surface of the transmission gear are of local design, and the gear teeth are meshingly connected with the opposite side of the rack.

[0014] Preferably, the working disk is fixedly connected to the bottom end of the connecting rod, and the bottom surface of the working disk is provided with a plurality of plug-in columns matching the flow ports.

[0015] Preferably, a first rubber sealing plug is fixedly connected to one side of the surface of the plurality of plug-in posts, and a second rubber sealing plug is fixedly connected to the bottom end of the plurality of plug-in posts.

[0016] The technical effects and advantages of the utility model are as follows: the utility model utilizes a motor to rotate the transmission gear to drive the lifting block to move up and down, and the gear teeth on the surface of the transmission gear are locally designed, so that the lifting block can achieve intermittent motion, and at the same time utilize the elastic force given by the spring provided on the surface of the sliding rod. At this time, the bottom working disk will also cause the plug-in column to be located inside the flow port for intermittent closure and opening due to the intermittent motion, so that the gas accumulated at the bottom of the working device can be gradually and effectively discharged during the discharge work, avoiding the one-time overturning of other devices to cause the expanded gas to damage the discharge pipe, improving the stability of gas discharge, and reducing safety hazards to a minimum. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0018] Figure 2 It is a partial front cross-sectional structural schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of the front cross-sectional structure of the lifting block of the utility model.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the lifting block of the utility model.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the working disk of the utility model.

[0022] In the figure: 1, wellhead pipe; 2, casing head; 3, working device; 4, exhaust pipe; 6, anti-channeling plate; 601, flow port; 7, lifting block; 701, fixing block; 702, sliding rod; 703, spring; 704, fixing groove; 705, rack; 706, limit block; 707, connecting rod; 8, motor; 801, receiving block; 802, rotating shaft; 803, transmission gear; 9, working disk; 901, plug-in column; 902, first rubber sealing plug; 903, second rubber sealing plug. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides Figure 1-5The oil wellhead gas channeling prevention device shown in the figure comprises a wellhead pipe 1 and a casing head 2 provided on the top surface, a working device 3 fixedly connected to the top surface of the casing head 2, and an exhaust pipe 4 provided on one side of the surface. The two sides of the inner wall of the working device 3 are commonly fixedly connected with an anti-channeling plate 6 that can isolate gas and use transmission to achieve gradual pressure relief. The top of the anti-channeling plate 6 is provided with a lifting block 7 that uses lifting to achieve a gradual pressure relief effect. The two sides of the inner wall of the working device 3 are provided with a motor 8 that can drive the lifting block 7. The bottom surface of the lifting block 7 is fixedly connected with a working disk 9 that cooperates with the anti-channeling plate 6 to relieve pressure. The utility model uses the motor 8 to drive the transmission gear 803 The rotation drives the lifting block 7 to move up and down, and the gear teeth on the surface of the transmission gear 803 are locally designed, so that the lifting block 7 can realize intermittent movement. At the same time, the elastic force given by the spring 703 provided on the surface of the sliding rod 702 is used. At this time, the bottom working disk 9 will also cause the plug-in column 901 to be located inside the flow port 601 for intermittent closure and opening due to the intermittent movement, so that the gas accumulated at the bottom of the working device 3 can be gradually and effectively discharged during the discharge work, avoiding the one-time overturning of other devices to cause the expanded gas to damage the discharge pipe, thereby improving the stability of gas discharge and reducing safety hazards to a minimum.

[0025] like Figure 2 As shown, the anti-channeling plate 6 is fixedly connected to both sides of the inner wall of the working device 3, and a plurality of flow openings 601 are opened on the inner wall of the anti-channeling plate 6. A receiving block 801 is fixedly connected to one side of the inner wall of the working device 3. The setting of the receiving block 801 can prevent the motor 8 from being in a suspended state inside the working device 3, so that the rotating shaft 802 can stably drive the transmission gear 803 to rotate. The motor 8 is fixedly connected to the top surface of the receiving block 801, and the output end of the motor 8 is fixedly connected to the rotating shaft 802, and one end of the rotating shaft 802 is rotatably connected to one side of the inner wall of the working device 3. A transmission gear 803 is provided on one side of the surface of the rotating shaft 802, and the gear teeth on the surface of the transmission gear 803 are locally designed, and the gear teeth are meshed with the opposite side of the rack 705. The locally designed gear teeth can enable the lifting block 7 to achieve intermittent movement, and the intermittent movement can achieve the gradual discharge effect of gas.

[0026] like Figure 3-4As shown, the lifting block 7 is arranged on the top of the anti-slip plate 6, and a fixed groove 704 is opened inside the lifting block 7. The lifting block 7 is located on the top surface of the fixed groove 704 and is fixedly connected with a fixed block 701. The fixed block 701 and the top surface of the working device 3 are jointly fixedly connected with a sliding rod 702. The bottom end of the sliding rod 702 passes through the interior of the fixed block 701 and is slidably connected to the inner wall of the fixed groove 704. The top surface of the inner wall of the working device 3 and the opposite side of the fixed block 701 are jointly provided with a spring 703, and the spring 703 is sleeved on the rod wall of the sliding rod 702. A rack 705 is provided on one side of the surface of the lifting block 7. The surface of the lifting block 7 is located on both sides of the rack 705 and is fixedly connected with limiting blocks 706. The bottom surface of the lifting block 7 is fixedly connected with a connecting rod 707. The setting of the limiting block 706 plays a limiting function, which ensures the stability of the lifting block 7 during operation.

[0027] like Figure 5 As shown, the working disk 9 is fixedly connected to the bottom end of the connecting rod 707, and the bottom surface of the working disk 9 is provided with a plurality of plug-in columns 901 matching the flow port 601, and a first rubber sealing plug 902 is fixedly connected to one side of the surface of the plurality of plug-in columns 901, and a second rubber sealing plug 903 is fixedly connected to the bottom end of the plurality of plug-in columns 901. The setting of the second rubber sealing plug 903 can make the plug-in column 901 deform when entering the flow port 601 to seal the flow port 601 and prevent gas leakage when transmission is not possible, and the setting of the first rubber sealing plug 902 is located on both sides of the inner wall of the flow port 601 to ensure that the gas is sealed again when passing through the second rubber sealing plug 903.

[0028] Working principle of the utility model: when the utility model is in use, the working device 3 is used to first realize the effect of gas flow inside the wellhead. However, when the internal gas needs to be discharged, it is only necessary to turn on the motor 8 so that the output end of the motor 8 drives the rotating shaft 802 to rotate. While the rotating shaft 802 rotates, the gear teeth locally provided on the surface of the transmission gear 803 drive the rack 705 to make the lifting block 7 realize intermittent movement up and down. When the lifting block 7 is driven by the transmission gear 803 to realize the upward movement, the spring 703 provided on the top of the lifting block 7 will be in a tightened state, and at the same time, the sliding rod 702 is extended and slid to the inside of the fixed groove 704. When the lifting block 7 is lifted, the working disk 9 fixedly connected at the bottom will drive the plug-in column 901 to move upward, so that the plug-in column 901 leaves the inside of the flow port 601, so that the gas enters the inside of the working device 3 and is discharged from the inside of the exhaust pipe 4.

[0029] However, when the gear teeth of the transmission gear 803 do not drive the lifting block 7 to move upward, the lifting block 7 will use the force given by the tightened spring 703 to push down and reset the lifting block 7. While moving downward and resetting, the plug-in column 901 provided at the bottom of the working disk 9 is reinserted into the interior of the flow port 601, so that the discharge stops flowing and waits for the next discharge formed by the transmission gear 803 driving the lifting block 7. The original text highlights the innovative structure and does not elaborate on the prior art.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil wellhead gas channeling prevention device, comprising a wellhead pipe (1), a casing head (2) provided on the top surface, a working device (3) fixedly connected to the top surface of the casing head (2), and an exhaust pipe (4) provided on one side of the surface, characterized in that: An anti-channeling plate (6) capable of isolating gas and realizing gradual pressure relief by transmission is fixedly connected to both sides of the inner wall of the working device (3); a lifting block (7) capable of realizing gradual pressure relief by lifting is provided on the top of the anti-channeling plate (6); a motor (8) capable of driving the lifting block (7) is provided on both sides of the inner wall of the working device (3); and a working disk (9) that cooperates with the anti-channeling plate (6) to relieve pressure is fixedly connected to the bottom surface of the lifting block (7).

2. The oil wellhead gas channeling prevention device according to claim 1, characterized in that: The anti-channeling plate (6) is fixedly connected to two sides of the inner wall of the working device (3), and the inner wall of the anti-channeling plate (6) is provided with a plurality of flow openings (601).

3. The oil wellhead gas channeling prevention device according to claim 1, characterized in that: The lifting block (7) is arranged on the top of the anti-channeling plate (6), and a fixing groove (704) is provided inside the lifting block (7).

4. The oil wellhead gas channeling prevention device according to claim 1, characterized in that: The lifting block (7) is located on the top surface of the fixing groove (704) and is fixedly connected to a fixing block (701); the fixing block (701) and the top surface of the working device (3) are jointly fixedly connected to a sliding rod (702); the bottom end of the sliding rod (702) passes through the interior of the fixing block (701) and is slidably connected to the inner wall of the fixing groove (704).

5. The oil wellhead gas channeling prevention device according to claim 1, characterized in that: A spring (703) is provided on the top surface of the inner wall of the working device (3) and the opposite surface of the fixed block (701), and the spring (703) is sleeved on the rod wall of the sliding rod (702).

6. The oil wellhead gas channeling prevention device according to claim 4, characterized in that: A rack (705) is provided on one side of the surface of the lifting block (7), and both sides of the surface of the lifting block (7) located on the rack (705) are fixedly connected to limit blocks (706), and the bottom surface of the lifting block (7) is fixedly connected to a connecting rod (707).

7. The oil wellhead gas channeling prevention device according to claim 1, characterized in that: A receiving block (801) is fixedly connected to one side of the inner wall of the working device (3); the motor (8) is fixedly connected to the top surface of the receiving block (801); an output end of the motor (8) is fixedly connected to a rotating shaft (802); one end of the rotating shaft (802) is rotatably connected to one side of the inner wall of the working device (3); and a transmission gear (803) is provided on one side of the surface of the rotating shaft (802).

8. The oil wellhead gas channeling prevention device according to claim 7, characterized in that: The gear teeth on the surface of the transmission gear (803) are of local design, and the gear teeth are meshedly connected with the opposite side of the rack (705).

9. The oil wellhead gas channeling prevention device according to claim 1, characterized in that: The working disk (9) is fixedly connected to the bottom end of the connecting rod (707), and the bottom surface of the working disk (9) is provided with a plurality of plug-in columns (901) matching the flow opening (601).

10. The oil wellhead gas channeling prevention device according to claim 9, characterized in that: A first rubber sealing plug (902) is also fixedly connected to one side of the surface of the plurality of plug-in columns (901), and a second rubber sealing plug (903) is fixedly connected to the bottom ends of the plurality of plug-in columns (901).

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