Detachable wellhead heat preservation device

Abstract

The utility model relates to the technical field of well mouth heat preservation, in particular to a detachable well mouth heat preservation device which comprises an installation cover, a sealing assembly is arranged at the top of the installation cover and comprises a sealing cover located at the top of the installation cover, a handle is fixedly connected to the outer portion of the sealing cover, and a rotating plate is rotationally connected to the interior of the sealing cover. A spring is arranged at the bottom of the rotating plate, the top of the spring is elastically connected with the rotating plate, the other end of the spring is elastically connected with a second sealing gasket, a damping rod is arranged in the spring, the bottom of the second sealing gasket abuts against the clamping groove, a heat preservation cavity is formed in the mounting cover, and a heating pipe is arranged in the heat preservation cavity. The two ends of the heating pipe penetrate through the mounting cover and are fixedly connected with the electric heater outside the mounting cover, and a fixing assembly is arranged in the mounting cover, so that the device is more convenient to mount and wider in applicability, the heat preservation performance of the device is enhanced, and meanwhile, the wellhead can be heated to improve the fluidity of crude oil.

Description

Technical Field

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

[0002] The main reason for heat preservation of oil well wellheads is to ensure the normal operation and production efficiency of oil wells, while ensuring the safety of staff and the stable operation of equipment. Through heat preservation measures, the wellhead temperature can be kept stable, which is crucial for improving the fluidity and output of crude oil. Temperature changes will affect the fluidity and output of crude oil, and the heat insulation sleeve can form an insulating layer between the wellhead wall and the wellbore wall to prevent heat conduction, thereby reducing the increase in bottom hole temperature, keeping the wellhead temperature stable, and then improving the fluidity and output of crude oil.

[0003] A heat preservation shell for a detachable wellhead device with the authorized announcement number of CN 208564506 U in China realizes the heat preservation of the wellhead device through the setting of the detachable wellhead device heat preservation shell, improves the service life of the wellhead device, reduces heat loss, and lowers the use cost.

[0004] However, there are still some deficiencies in the use of this patent. Most of the existing wellhead heat preservation devices only have a heat preservation structure, and the purpose of heat preservation is to keep the wellhead temperature stable and improve the fluidity of crude oil. However, in low-temperature weather, the fluidity of crude oil is poor, resulting in difficult single-well gathering and transportation. Therefore, a temperature control component needs to be added to the wellhead heat preservation device to enhance the fluidity of crude oil and thus increase the output of crude oil. In addition, during the installation of the existing wellhead heat preservation devices, the installation process is very cumbersome, and they cannot be widely applied, with low practicability. Content of the Utility Model

[0005] The purpose of the utility model is to provide a detachable wellhead heat preservation device to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A detachable wellhead heat preservation device includes an installation cover. A clamping groove is opened at the top of the installation cover. A sealing component is arranged at the top of the installation cover. The sealing component includes a sealing cover located at the top of the installation cover. A handle is fixedly connected to the outside of the sealing cover. A rotating plate is rotatably connected to the inside of the sealing cover. A spring is arranged at the bottom of the rotating plate. The top of the spring is elastically connected to the rotating plate, and the other end of the spring is elastically connected to a second sealing pad. A damping rod is arranged inside the spring. The bottom of the second sealing pad abuts against the clamping groove.

[0008] As a preferred embodiment of the present utility model, an electric heater is fixedly installed on the side of the installation cover. A heat preservation cavity is formed inside the installation cover, and a heating pipe is arranged inside the heat preservation cavity. Both ends of the heating pipe penetrate through the installation cover and are fixedly connected to the electric heater.

[0009] As a preferred embodiment of the present utility model, a fixing component is arranged inside the installation cover. The fixing component includes a limiting pipe penetrating through the installation cover. The limiting pipe is fixedly connected to the installation cover, and a threaded sleeve is rotatably connected to the side of the limiting pipe.

[0010] As a preferred embodiment of the present utility model, an adjusting threaded rod is threadedly connected inside the threaded sleeve. A clamping block is fixedly connected to the side of the adjusting threaded rod, and anti-slip lines are arranged on the side of the clamping block.

[0011] As a preferred embodiment of the present utility model, a limiting rod is fixedly connected to the side of the clamping block. The limiting rod penetrates through the installation cover and is slidably connected to the installation cover.

[0012] As a preferred embodiment of the present utility model, heat preservation materials are filled inside the heat preservation cavity. The heat preservation materials are embedded with the heating pipe, and the heat preservation materials are made of polyethylene.

[0013] As a preferred embodiment of the present utility model, a temperature sensor is arranged on the inner wall of the installation cover. The temperature sensor is electrically connected to the electric heater.

[0014] As a preferred embodiment of the present utility model, a first sealing gasket is arranged at the bottom of the installation cover. The material of the first sealing gasket is made of rubber.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. In the present utility model, the heat preservation performance of the device is enhanced by setting an installation cover, a sealing component, an electric heater, and a heating pipe. The heating pipe and the heat preservation cavity arranged inside the installation cover, as well as the heat preservation material inside the heat preservation cavity, enhance the heat preservation performance of the device. At the same time, it can heat the wellhead to improve the fluidity of the crude oil. After installing the wellhead heat preservation device on the wellhead, when the temperature of the wellhead is relatively low, turn on the switch of the electric heater. The electric heater controls the heating pipe to heat, and conducts and preserves heat through the heat preservation material in the heat preservation cavity. By setting a temperature range for the temperature sensor inside the installation cover, when not within the temperature range, the temperature sensor controls the electric heater to make the heating pipe heat. When within the temperature range, the temperature sensor controls the electric heater to stop working, realizing the automated heating process, keeping the temperature of the wellhead in a stable range all the time, and also enhancing the fluidity of the crude oil. In addition, in order to reduce heat loss, a sealing cover is threadedly connected to the top of the installation cover. A spring and a second sealing pad are arranged at the bottom of the sealing cover, making the second sealing pad abut against the clamping groove at the top of the installation cover, thus ensuring the sealing performance of the device and further reducing heat loss. When the well needs to be used, just unscrew the sealing cover.

[0017] 2. In the present utility model, by setting a fixing component, the wellhead heat preservation device is applicable to wellheads of different models, enhancing the applicability and being very convenient to install. When the device needs to be installed on the top of the wellhead, first place the installation cover on the top of the well, and then respectively turn the threaded sleeves to make the adjusting threaded rod move along the limiting tube until the clamping block abuts against the wellhead. At the same time, the clamping block is limited by the limiting rod to prevent the clamping block from shaking after installation, resulting in the instability of the wellhead heat preservation device. The first sealing pad arranged at the bottom of the installation cover deforms under the gravity of the device itself, ensuring the sealing effect of the device and thus reducing the heat loss inside the device. The anti-slip patterns opened on the side of the clamping block fit with the outer wall of the wellhead, thus realizing the fixation of the wellhead and the device, avoiding the loss of the wellhead temperature due to unstable installation and delaying the normal use of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall schematic diagram of the present utility model;

[0019] Figure 2 is the overall cross-sectional schematic diagram of the present utility model;

[0020] Figure 3 is the overall longitudinal-sectional schematic diagram of the present utility model;

[0021] Figure 4 is the overall longitudinal-sectional schematic diagram of the present utility model from another angle;

[0022] Figure 5Schematic diagram of the heating structure of the present utility model.

[0023] In the figure: 1. Installation cover; 2. Sealing assembly; 3. Fixing assembly; 4. Electric heater; 5. First sealing gasket; 6. Heating pipe; 7. Card slot; 8. Heat preservation cavity; 9. Temperature sensor; 201. Handle; 202. Sealing cover; 203. Spring; 204. Damping rod; 205. Second sealing gasket; 206. Rotating plate; 301. Adjusting screw rod; 302. Thread sleeve; 303. Limiting pipe; 304. Limiting rod; 305. Clamping block; 306. Anti-slip pattern. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0025] Embodiment, please refer to Figures 1-5 , the present utility model provides a technical solution:

[0026] A detachable wellhead heat preservation device includes an installation cover 1. A card slot 7 is opened at the top of the installation cover 1. A sealing assembly 2 is arranged at the top of the installation cover 1. A fixing assembly 3 is arranged inside the installation cover 1. The heat preservation cavity 8 is filled with heat preservation materials. The heat preservation materials and the heating pipe 6 are embedded. The heat preservation materials are set as polyethylene. A temperature sensor 9 is arranged on the inner wall of the installation cover 1. The temperature sensor 9 is electrically connected to the electric heater 4. A first sealing gasket 5 is arranged at the bottom of the installation cover 1. The material of the first sealing gasket 5 is set as rubber.

[0027] In this embodiment, as shown in Figure 1 , Figure 3 , Figure 4 and Figure 5 , an electric heater 4 is fixedly installed on the side of the installation cover 1. A heat preservation cavity 8 is opened inside the installation cover 1. A heating pipe 6 is arranged inside the heat preservation cavity 8. Both ends of the heating pipe 6 penetrate through the installation cover 1 and both ends of the heating pipe 6 are fixedly connected to the electric heater 4. The sealing assembly 2 includes a sealing cover 202 located at the top of the installation cover 1. A handle 201 is fixedly connected to the outside of the sealing cover 202. A rotating plate 206 is rotatably connected to the inside of the sealing cover 202. A spring 203 is arranged at the bottom of the rotating plate 206. The top of the spring 203 is elastically connected to the rotating plate 206. The other end of the spring 203 is elastically connected to a second sealing gasket 205. A damping rod 204 is arranged inside the spring 203. The bottom of the second sealing gasket 205 abuts against the card slot 7.

[0028] Among them, the installation cover 1, the sealing component 2, the electric heater 4 and the heating pipe 6 are provided to enhance the heat preservation performance of the device. The heating pipe 6, the heat preservation cavity 8 arranged inside the installation cover 1 and the heat preservation material in the heat preservation cavity 8 enhance the heat preservation performance of the device. At the same time, it can heat the wellhead to improve the fluidity of the crude oil. After the wellhead heat preservation device is installed on the wellhead, when the temperature of the wellhead is relatively low, the switch of the electric heater 4 is turned on. The electric heater 4 controls the heating pipe 6 to heat, and conducts and keeps warm through the heat preservation material in the heat preservation cavity 8. By setting the temperature range for the temperature sensor 9 inside the installation cover 1, when it is not within the temperature range, the temperature sensor 9 controls the electric heater 4 to make the heating pipe 6 heat. When it is within the temperature range, the temperature sensor 9 controls the electric heater 4 to stop working, realizing the automatic heating process, making the temperature of the wellhead always in a stable range and also enhancing the fluidity of the crude oil. In addition, in order to reduce heat dissipation, a sealing cover 202 is threadedly connected to the top of the installation cover 1. A spring 203 and a second sealing gasket 205 are arranged at the bottom of the sealing cover 202, so that the second sealing gasket 205 abuts against the clamping groove 7 at the top of the installation cover 1, thus ensuring the sealing performance of the device and further reducing heat dissipation. And when the well needs to be used, just unscrew the sealing cover 202.

[0029] In this embodiment, as Figure 1 、 Figure 2 and Figure 4 shown, the fixing component 3 includes a limiting pipe 303 penetrating through the installation cover 1. The limiting pipe 303 is fixedly connected to the installation cover 1. A threaded sleeve 302 is rotatably connected to the side of the limiting pipe 303. An adjusting threaded rod 301 is threadedly connected inside the threaded sleeve 302. A clamping block 305 is fixedly connected to the side of the adjusting threaded rod 301. Anti-slip lines 306 are arranged on the side of the clamping block 305. A limiting rod 304 is fixedly connected to the side of the clamping block 305. The limiting rod 304 penetrates through the installation cover 1 and the limiting rod 304 is slidably connected to the installation cover 1.

[0030] Among them, by setting the fixed component 3, the wellhead heat preservation device is applicable to wellheads of different models, which enhances the applicability and is also very convenient to install. When the device needs to be installed on the top of the wellhead, first place the installation cover 1 on the top of the well, and then respectively turn the threaded sleeve 302 to make the adjusting threaded rod 301 move along the limiting tube 303 until the clamping block 305 abuts against the wellhead. At the same time, the clamping block 305 is limited by the limiting rod 304 to prevent the clamping block 305 from shaking after installation, which may cause the wellhead heat preservation device to be unstable. The first sealing gasket 5 provided at the bottom of the installation cover 1 deforms under the gravity of the device itself, ensuring the sealing effect of the device, thereby reducing the heat loss inside the device. The anti-slip pattern 306 provided on the side of the clamping block 305 fits the outer wall of the wellhead, thereby realizing the fixation of the wellhead and the device, avoiding the loss of wellhead temperature due to unstable installation and delaying the normal use of the staff.

[0031] The working process of the present utility model: When using a detachable wellhead heat preservation device designed by this solution in work, first place the installation cover 1 on the top of the well, and then respectively turn the threaded sleeve 302 to make the adjusting threaded rod 301 move along the limiting tube 303 until the clamping block 305 abuts against the wellhead. At the same time, the clamping block 305 is limited by the limiting rod 304 to prevent the clamping block 305 from shaking after installation, which may cause the wellhead heat preservation device to be unstable. The first sealing gasket 5 provided at the bottom of the installation cover 1 deforms under the gravity of the device itself, ensuring the sealing effect of the device, thereby reducing the heat loss inside the device. The anti-slip pattern 306 provided on the side of the clamping block 305 fits the outer wall of the wellhead, thereby realizing the fixation of the wellhead and the device. After installation, when the temperature of the wellhead is relatively low, turn on the switch of the electric heater 4. The electric heater 4 controls the heating tube 6 to heat, and conducts and keeps warm through the heat preservation material in the heat preservation cavity 8. By setting the temperature range for the temperature sensor 9 inside the installation cover 1, when not within the temperature range, the temperature sensor 9 controls the electric heater 4 to make the heating tube 6 heat, and when within the temperature range, the temperature sensor 9 controls the electric heater 4 to stop working, realizing the automatic heating process, making the temperature of the wellhead always in a stable range and enhancing the fluidity of the crude oil. In addition, in order to reduce heat loss, a sealing cover 202 is threadedly connected to the top of the installation cover 1. A spring 203 and a second sealing gasket 205 are provided at the bottom of the sealing cover 202, so that the second sealing gasket 205 abuts against the clamping groove 7 at the top of the installation cover 1, thereby ensuring the sealing performance of the device and further reducing heat loss. When the well needs to be used, just unscrew the sealing cover 202.

[0032] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A detachable wellhead insulation device, comprising a mounting cover (1), characterized in that: A slot (7) is provided at the top of the mounting cover (1), and a sealing assembly (2) is arranged at the top of the mounting cover (1). The sealing assembly (2) comprises a sealing cover (202) located at the top of the mounting cover (1), the outside of the sealing cover (202) is fixedly connected to a handle (201), the inside of the sealing cover (202) is rotatably connected to a rotating plate (206), a spring (203) is arranged at the bottom of the rotating plate (206), the top of the spring (203) is elastically connected to the rotating plate (206), the other end of the spring (203) is elastically connected to a second sealing pad (205), a damping rod (204) is arranged inside the spring (203), and the bottom of the second sealing pad (205) is in contact with the slot (7).

2. A detachable wellhead insulation device according to claim 1, characterized in that: An electric heater (4) is fixedly mounted on the side of the mounting cover (1), a heat preservation cavity (8) is provided inside the mounting cover (1), a heating tube (6) is arranged inside the heat preservation cavity (8), both ends of the heating tube (6) pass through the mounting cover (1), and both ends of the heating tube (6) are fixedly connected to the electric heater (4).

3. A detachable wellhead insulation device according to claim 2, characterized in that: A fixing assembly (3) is arranged inside the mounting cover (1), and the fixing assembly (3) comprises a position limiting tube (303) penetrating the mounting cover (1), the position limiting tube (303) and the mounting cover (1) are fixedly connected, and a threaded sleeve (302) is rotatably connected to a side surface of the position limiting tube (303).

4. A detachable wellhead insulation device according to claim 3, characterized in that: The internal thread of the threaded sleeve (302) is connected to an adjusting threaded rod (301), a side of the adjusting threaded rod (301) is fixedly connected to a clamping block (305), and a side of the clamping block (305) is provided with anti-slip grooves (306).

5. A detachable wellhead insulation device according to claim 4, characterized in that: A side surface of the clamping block (305) is fixedly connected to a limiting rod (304), the limiting rod (304) penetrates the mounting cover (1), and the limiting rod (304) and the mounting cover (1) are slidably connected.

6. A detachable wellhead insulation device according to claim 2, characterized in that: The interior of the heat-insulating cavity (8) is filled with a heat-insulating material, the heat-insulating material and the heating tube (6) are embedded, and the heat-insulating material is set to polyethylene.

7. The detachable wellhead insulation device according to claim 1, characterized in that: A temperature sensor (9) is provided on the inner wall of the mounting cover (1), and the temperature sensor (9) is electrically connected to the electric heater (4).

8. The detachable wellhead insulation device according to claim 1, characterized in that: A first sealing gasket (5) is provided at the bottom of the mounting cover (1), and the material of the first sealing gasket (5) is set to be rubber.

Images