Heating type wellhead for oil exploitation

Abstract

The utility model relates to the field of oil exploitation, in particular to a heating type wellhead for oil exploitation, which comprises a conveying pipeline and a plurality of oil way control valve assemblies connected to the top of the conveying pipeline, and an adjustable electromagnetic heating sleeve mechanism is mounted on the surface of the conveying pipeline. The top and the bottom of the adjustable electromagnetic heating sleeve mechanism are connected with fixing mechanisms correspondingly, the fixing mechanisms are installed on the surface of the conveying pipeline, the adjustable electromagnetic heating sleeve mechanism comprises a heat preservation installation sleeve and an electric heating coil connected to the inner side of the heat preservation installation sleeve, and a temperature sensor is installed on the heat preservation installation sleeve. And one end of the temperature sensor extends into the heat preservation mounting sleeve. When the electric heating coil is used, the temperature of crude oil in the conveying pipeline is rapidly increased, the flowing efficiency of the crude oil is improved, wax precipitation is prevented, and when the position of the heat preservation installation sleeve is adjusted, the universal ball rolls on the surface of the conveying pipeline, so that the heating position is changed, and the heating position of a pipe opening can be adjusted; and the crude oil extraction and transportation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of oil exploitation, in particular to a heating wellhead for oil exploitation. Background Art

[0002] During the oil extraction process, crude oil is subjected to higher temperatures and pressures underground and has better fluidity. However, after the crude oil is extracted from the wellhead, the ground temperature is much lower than the underground temperature, so the temperature of the crude oil will drop rapidly, causing its fluidity to deteriorate and may even solidify, affecting the extraction efficiency. By heating the wellhead, the temperature of the crude oil can be increased, accelerating the flow of crude oil, making it easier to be pumped out of the ground, facilitating extraction and transportation, and reducing resistance in the extraction process. In some areas, environmental regulations require reducing energy consumption and emissions in the crude oil extraction process. By heating the wellhead, energy consumption and emissions in the crude oil extraction and transportation process can also be reduced, meeting environmental protection requirements.

[0003] With respect to the above-mentioned related technologies, the inventors have found that when the wellhead crude oil temperature is lower than a certain critical value, the fluidity of the crude oil may be reduced, increasing the difficulty and cost of pipeline transportation. At this time, the heating position should be adjusted in time to increase the heating amount of the crude oil to increase its temperature and ensure smooth transportation. At the same time, during the transportation of crude oil, as the temperature decreases, the wax in the crude oil may precipitate and deposit on the inner wall of the pipeline to form wax deposits. Waxing will reduce the effective flow area of ​​the pipeline and increase the transportation resistance. In order to prevent or solve the waxing problem, it is necessary to adjust the heating position, increase the temperature of the crude oil in the pipeline, and prevent the precipitation of wax. However, the heating mechanism of the traditional oil wellhead is generally fixed at a certain place of the wellhead, which is not convenient for adjusting the heating position, and the disassembly and assembly is time-consuming and labor-intensive, which not only affects the fluidity of the crude oil, but also affects the efficiency of crude oil extraction and transportation. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a heating wellhead for oil exploitation, which is convenient for adjusting the heating position of the pipe mouth and improving the fluidity of crude oil and the efficiency of crude oil exploitation and transportation.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a heating wellhead for oil extraction, comprising: a delivery pipeline and a plurality of oil circuit control valve assemblies connected to the top thereof, an adjustable electromagnetic heating sleeve mechanism is installed on the surface of the delivery pipeline, and the top and bottom of the adjustable electromagnetic heating sleeve mechanism are respectively connected to fixing mechanisms, and the fixing mechanisms are installed on the surface of the delivery pipeline;

[0006] The adjustable electromagnetic heating sleeve mechanism comprises a heat-insulating installation sleeve and an electric heating coil connected to the inner side thereof, a temperature sensor is installed on the heat-insulating installation sleeve, one end of the temperature sensor extends into the heat-insulating installation sleeve, the electric heating coil is sleeved on the outer side of the conveying pipeline, the inner ends of the heat-insulating installation sleeve are respectively connected to mounting rings, the inner annular array of the mounting ring has a plurality of universal balls, and the universal balls are in rolling contact with the surface of the conveying pipeline;

[0007] The opposite ends of the mounting rings are respectively connected with telescopic heat-insulating structures.

[0008] By adopting the above technical solution, the electric heating coil generates high-frequency current when in use, and generates a strong fixed magnetic field inside the heating body. The magnetic lines of force activate the molecules, causing the molecules to move rapidly, generating a large amount of heat energy, and rapidly increasing the temperature of the crude oil inside the conveying pipeline to improve its flow efficiency and prevent wax precipitation. When the position of the insulation installation sleeve is adjusted, the universal ball rolls on the surface of the conveying pipeline to change the heating position, and after the position is adjusted, it is fixed with the fixing mechanism, and at the same time, the telescopic insulation structure is extended to insulate the heat overflowing from both ends, thereby improving the utilization rate of thermal energy and further improving the efficiency of crude oil extraction and transportation.

[0009] In a preferred example, the utility model can be further configured as follows: the fixing mechanism includes an arc-shaped clamping ring 1 and an arc-shaped clamping ring 2, and a plurality of movable grooves are respectively provided in a circular array on the arc-shaped clamping ring 1 and the arc-shaped clamping ring 2, and a screw is connected in the movable groove, one end of the screw is respectively connected to the top of the thermal insulation mounting sleeve, and the other end is threadedly connected to a locking nut, the two ends of the arc-shaped clamping ring 1 are respectively connected to a mounting block 1, and the two ends of the arc-shaped clamping ring 2 are respectively connected to a mounting block 2, and the corresponding mounting block 1 is respectively connected to the corresponding mounting block 2 by bolts.

[0010] By adopting the above technical solution, the arc-shaped clamping ring 1 and the arc-shaped clamping ring 2 can move along the movable groove, and after the mounting block 1 and the corresponding mounting block 2 are fixed with bolts, the thermal insulation mounting sleeve is also fixed, thereby improving the stability when the pipe mouth is heated. At the same time, the arc-shaped clamping ring 1 and the arc-shaped clamping ring 2 can be disassembled through the screw and the locking nut, thereby improving the convenience during maintenance.

[0011] In a preferred example, the utility model can be further configured as follows: the telescopic insulation structure includes an accordion insulation cover, one end of the accordion insulation cover is installed with an elastic connecting cover 1, and the other end is installed with a connecting cover 2, the end of the connecting cover 1 away from the accordion insulation cover is connected to a limiting ring, the surface of the connecting cover 1 is covered with a clamp with one side open, the open ends of the clamp are respectively connected to locking blocks, and the locking blocks are connected by bolts.

[0012] By adopting the above technical solution, when the thermal insulation installation sleeve is installed in the required position, the accordion insulation cover is extended to preserve the heat overflowing from both ends of the thermal insulation installation sleeve, insulate and preheat the crude oil in the pipelines at both ends, and improve the utilization rate of thermal energy.

[0013] In a preferred example, the utility model can be further configured as follows: the inner sides of the arc-shaped clamping ring 1 and the arc-shaped clamping ring 2 are respectively connected with anti-slip rubber pads.

[0014] By adopting the above technical solution, when the arc clamping ring 1 and the arc clamping ring 2 are locked, the inner side is tightly connected to the outer side of the conveying pipe, and under the action of the anti-slip rubber pad, the friction between the two is improved to ensure the structural stability of the insulation installation sleeve.

[0015] In a preferred example, the utility model can be further configured as follows: the thermal insulation installation sleeve includes a tube body, and thermal insulation cotton is connected to the surface of the tube body.

[0016] By adopting the above technical solution, the electric heating coil will generate excess heat in the pipe body, and the thermal insulation cotton will protect the heat in the pipe body, thereby improving its thermal insulation effect and making full use of thermal energy.

[0017] In a preferred example, the utility model can be further configured as follows: an elastic pad is connected to a side of the mounting block 1 close to the mounting block 2.

[0018] By adopting the above technical solution, the first mounting block and the second mounting block are in contact when being fastened by the bolts, and the elastic pad increases the static friction coefficient and forms a certain deformation gap, thereby improving the installation stability.

[0019] In summary, the utility model includes at least one of the following beneficial technical effects of a heated wellhead for oil production:

[0020] 1. The electric heating coil generates high-frequency current when in use, and generates a strong fixed magnetic field inside the heating body. The magnetic lines of force activate the molecules, causing them to move rapidly, generating a large amount of heat energy, and rapidly increasing the temperature of the crude oil inside the pipeline to improve its flow efficiency and prevent wax precipitation. When the position of the insulation installation sleeve is adjusted, the universal ball rolls on the surface of the pipeline to change the heating position, and then it is fixed with the fixing mechanism, which can not only adjust the heating position of the pipe mouth, but also improve the efficiency of crude oil extraction and transportation.

[0021] 2. After the thermal insulation installation sleeve is installed in the required position, the arc clamping ring 1 and the arc clamping ring 2 are used to fix its ends, which ensures the stability of the structure and reduces heat loss. At the same time, the accordion insulation cover is extended to extend the thermal insulation installation sleeve, so that a small amount of heat overflowing from both ends can be preserved, and the crude oil in the pipelines at both ends can be insulated and preheated, thereby improving the utilization rate of thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the adjustable electromagnetic heating sleeve mechanism of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the fixing mechanism of the utility model.

[0026] In the figure: 1. delivery pipeline; 2. oil circuit control valve assembly; 30. adjustable electromagnetic heating sleeve mechanism; 40. fixing mechanism; 50. telescopic insulation structure;

[0027] 31. Insulation installation sleeve; 32. Electric heating coil; 33. Temperature sensor; 34. Installation ring; 35. Universal ball;

[0028] 41. Arc clamping ring 1; 42. Arc clamping ring 2; 43. Movable groove; 44. Screw; 45. Locking nut; 46. Mounting block 1; 47. Mounting block 2; 48. Anti-slip rubber pad; 49. Elastic pad;

[0029] 51. Organ insulation cover; 52. Connecting cover 1; 53. Connecting cover 2; 54. Limiting ring; 55. Hoop; 56. Locking block;

[0030] 311. Tube body; 312. Thermal insulation cotton. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0033] Reference Figure 1-3, is a heating wellhead for oil exploitation disclosed in the utility model, comprising: a delivery pipeline 1 and a plurality of oil circuit control valve assemblies 2 connected to the top thereof, an adjustable electromagnetic heating sleeve mechanism 30 is installed on the surface of the delivery pipeline 1, the top and bottom of the adjustable electromagnetic heating sleeve mechanism 30 are respectively connected to a fixing mechanism 40, the fixing mechanism 40 is installed on the surface of the delivery pipeline 1, the adjustable electromagnetic heating sleeve mechanism 30 comprises a heat preservation installation sleeve 31 and an electric heating coil 32 connected to the inner side thereof, a temperature sensor 33 is installed on the heat preservation installation sleeve 31, one end of the temperature sensor 33 extends into the heat preservation installation sleeve 31, the electric heating coil 32 is sleeved on the outer side of the delivery pipeline 1, the inner ends of the heat preservation installation sleeve 31 are respectively connected to mounting rings 34, the inner annular array of the mounting ring 34 has a plurality of universal balls 35, the universal balls 35 are in rolling contact with the surface of the delivery pipeline 1, and the opposite ends of the mounting ring 34 are respectively connected to telescopic heat preservation structures 50, The heat-insulating installation sleeve 31 includes a pipe body 311, and the surface of the pipe body 311 is connected with heat-insulating cotton 312; the electric heating coil 32 will generate high-frequency current during use, and generate a strong fixed magnetic field inside the conveying pipeline 1. The magnetic lines of force activate the molecules, causing the molecules to move rapidly, generating a large amount of heat energy, and rapidly increasing the temperature of the internal fluid, which can rapidly increase the temperature of the crude oil inside the conveying pipeline 1, improve its flow efficiency, and prevent wax precipitation. Under the action of the temperature sensor 33, the wellhead temperature and production conditions are fed back to the operator to avoid overheating, overpressure, etc. At the same time, when the heating position of the pipe body 311 needs to be adjusted, the universal ball 35 is rolled on the surface of the conveying pipeline 1 to adjust the heating position of the pipe body 311 and the electric heating coil 32, and after the position is adjusted, it is fixed by the fixing mechanism 40 to reduce the heat loss at both ends. At the same time, under the action of the heat-insulating cotton 312, the heat-insulating effect of the pipe body 311 is improved to make full use of heat energy.

[0034] The fixing mechanism 40 includes an arc-shaped clamping ring 1 41 and an arc-shaped clamping ring 2 42. The inner sides of the arc-shaped clamping ring 1 41 and the arc-shaped clamping ring 2 42 are respectively connected with anti-skid rubber pads 48. The arc-shaped clamping ring 1 41 and the arc-shaped clamping ring 2 42 are respectively provided with a plurality of movable grooves 43 in an annular array. The movable grooves 43 are connected with screws 44. One end of the screws 44 is respectively connected to the top of the thermal insulation installation sleeve 31, and the other end is threadedly connected with a locking nut 45. The two ends of the arc-shaped clamping ring 1 41 are respectively connected with mounting blocks 1 46. The two ends of the arc-shaped clamping ring 2 42 are respectively connected with mounting blocks 2 47. The corresponding mounting blocks 1 46 are respectively connected with the corresponding mounting blocks 2 47 by bolts. The side of the mounting block 1 46 close to the mounting block 2 47 is connected with an elastic pad 49. The inner curvature of the arc-shaped clamping ring 1 42 is adapted to the arc of the outer surface of the conveying pipeline 1. After the heating position is confirmed on the pipe body 311, the arc-shaped clamping ring 1 41 and the arc-shaped clamping ring 2 42 are moved toward each other for locking through the locking bolt. Since the screw 44 and the locking nut 45 cooperate, the screw 44 is limited in the movable groove 43. After the screw 44 and the locking nut 45 are locked, the end of the pipe body 311 can be effectively fixed to reduce heat loss and ensure its stability during fixation. The locking nut 45 can also be rotated to facilitate the subsequent maintenance of the arc-shaped clamping ring 1 41 and the arc-shaped clamping ring 2 42. In addition, a countersunk hole can be opened on the arc-shaped clamping ring 1 41 or the arc-shaped clamping ring 2 42 to facilitate the installation and positioning of the nut of the bolt, thereby improving the convenience during locking.

[0035] The telescopic insulation structure 50 includes an accordion insulation cover 51, one end of which is equipped with an elastic connecting cover 1 52, and the other end is equipped with a connecting cover 2 53. The end of the connecting cover 1 52 away from the accordion insulation cover 51 is connected to a limiting ring 54, and the surface of the connecting cover 1 52 is covered with a clamp 55 with an opening on one side, and the open ends of the clamp 55 are respectively connected to locking blocks 56, and the locking blocks 56 are connected by bolts; the accordion insulation cover 51 is made of insulation material. When the adjustable electromagnetic heating sleeve mechanism 30 is fixed, the accordion insulation cover 51 is extended, and the insulation area at both ends of the heating position of the conveying pipeline 1 can be extended, so that the heat lost at both ends can be utilized, and the crude oil in the two ends of the conveying pipeline 1 can be insulated and preheated, thereby improving the utilization rate of thermal energy.

[0036] The implementation principle of this embodiment is as follows: when in use, the staff drives the tube body 311 to move axially in the conveying pipeline 1. At this time, the universal ball 35 rolls on the surface of the conveying pipeline 1, effectively adjusting the heating position of the tube body 311 and the electric heating coil 32, and tightens the bolts on the arc clamping ring 1 41 and the arc clamping ring 2 42 after adjusting the position, so that the arc clamping ring 1 41 and the arc clamping ring 2 42 move toward each other and lock, and then tighten the locking nut 45, so as to fix the ends of the tube body 311 and reduce the heat loss at both ends, and then extend the accordion insulation cover 51 to extend the heating and insulation area at both ends of the heating position of the conveying pipeline 1. At this time, the electric heating coil 32 operates to generate high-frequency current and generates a strong fixed magnetic field inside the conveying pipeline 1. The magnetic lines of force activate the molecules, causing the molecules to move rapidly, generating a large amount of heat energy, and rapidly increasing the temperature of the crude oil. Under the action of the accordion insulation cover 51, the little heat lost at both ends of the tube body 311 is preserved and fully utilized.

[0037] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heating wellhead for oil production, comprising: A delivery pipeline (1) and a plurality of oil circuit control valve assemblies (2) connected to the top thereof, characterized in that an adjustable electromagnetic heating sleeve mechanism (30) is installed on the surface of the delivery pipeline (1), the top and bottom of the adjustable electromagnetic heating sleeve mechanism (30) are respectively connected to fixing mechanisms (40), and the fixing mechanisms (40) are installed on the surface of the delivery pipeline (1); The adjustable electromagnetic heating sleeve mechanism (30) comprises a heat-insulating installation sleeve (31) and an electric heating coil (32) connected to the inner side thereof; a temperature sensor (33) is installed on the heat-insulating installation sleeve (31); one end of the temperature sensor (33) extends into the heat-insulating installation sleeve (31); the electric heating coil (32) is sleeved on the outer side of the conveying pipeline (1); the inner ends of the heat-insulating installation sleeve (31) are respectively connected to mounting rings (34); a plurality of universal balls (35) are arranged in an annular array on the inner side of the mounting ring (34); the universal balls (35) are in rolling contact with the surface of the conveying pipeline (1); The opposite ends of the mounting ring (34) are respectively connected to a telescopic heat-insulating structure (50).

2. A heating wellhead for oil production according to claim 1, characterized in that: The fixing mechanism (40) comprises an arc-shaped clamping ring 1 (41) and an arc-shaped clamping ring 2 (42), wherein the arc-shaped clamping ring 1 (41) and the arc-shaped clamping ring 2 (42) are respectively provided with a plurality of movable grooves (43) in a circular array, wherein a screw rod (44) is connected in the movable groove (43), wherein one end of the screw rod (44) is respectively connected to the top of the thermal insulation installation sleeve (31), and the other end is threadedly connected to a locking nut (45), wherein the two ends of the arc-shaped clamping ring 1 (41) are respectively connected to a mounting block 1 (46), and the two ends of the arc-shaped clamping ring 2 (42) are respectively connected to a mounting block 2 (47), and the corresponding mounting block 1 (46) is respectively connected to the corresponding mounting block 2 (47) by bolts.

3. A heating wellhead for oil production according to claim 1, characterized in that: The telescopic heat-insulating structure (50) comprises an accordion heat-insulating cover (51), one end of the accordion heat-insulating cover (51) is installed with an elastic connecting cover 1 (52), and the other end is installed with a connecting cover 2 (53), the end of the connecting cover 1 (52) away from the accordion heat-insulating cover (51) is connected to a limiting ring (54), the surface of the connecting cover 1 (52) is provided with a clamp (55) with one side open, the open ends of the clamp (55) are respectively connected with locking blocks (56), and the locking blocks (56) are connected by bolts.

4. A heating wellhead for oil production according to claim 2, characterized in that: The inner sides of the arc-shaped clamping ring 1 (41) and the arc-shaped clamping ring 2 (42) are respectively connected with anti-skid rubber pads (48).

5. A heating wellhead for oil production according to claim 1, characterized in that: The heat-insulating installation sleeve (31) comprises a tube body (311), and a heat-insulating cotton (312) is connected to the surface of the tube body (311).

6. A heating wellhead for oil production according to claim 2, characterized in that: A side of the mounting block 1 (46) close to the mounting block 2 (47) is connected with an elastic pad (49).

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