Electric heater device for heating crude oil

Abstract

An electric heater device used for heating crude oil comprises a heating pipe body (1), a liquid distribution pipe (2) is arranged on the lower portion of the heating pipe body (1), two sets of liquid distribution holes (21) are formed in the side wall of the bottom of the liquid distribution pipe (2), and the two sets of liquid distribution holes (21) are symmetrically arranged along the central axis of the liquid distribution pipe (2). The flowing direction of fluid in the heater is changed by adding the liquid distribution pipes and the liquid distribution holes, so that the fluid uniformly flows in the heater and flows to the bottom of the heater, impurities in crude oil are continuously carried away by the fluid, and the problem that the heater is overheated and damaged due to sand accumulation at the bottom of a conventional electric heating device is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of oilfield crude oil heating, and specifically relates to an electric heater device for crude oil heating. Background Technique

[0002] The existing crude oil electric heater is composed of a heater (heating tube) and a housing. As shown in the attached Figure 1 figure, the gas-liquid mixed medium produced by the oil well enters from the lower part N1 of the housing, exchanges heat with the heating tubes in the housing, and exits the heater through N2, achieving the purpose of raising the temperature of the well fluid; one end of the head of the existing heater housing is sealed in a welded form.

[0003] In actual oilfield applications, it is found that this device has the following disadvantages:

[0004] 1. The liquid inlet of the heater flows unevenly inside the heater, and impurities in the crude oil deposit at the bottom of the heater, causing partial heating coils to be buried. During the heating process, the heat transfer is insufficient, and the partial heating coils are overheated and burned out, resulting in a decrease in the overall heating capacity of the heater;

[0005] 2. The gas in the heater accumulates at the upper front end inside the heater, causing the heating tubes at this part of the heater to dry burn, the temperature to rise too fast, resulting in the temperature control switch frequently operating to start and stop the heater, and even burning out the heating tubes, resulting in a decrease in the overall heating capacity of the heater;

[0006] 3. One end of the heater device is designed with a welded circular head, resulting in the need to remove a 310 Kg heater during device maintenance for cleaning. Content of the Utility Model

[0007] The purpose of this utility model is to provide an electric heater device for crude oil heating. By increasing the liquid distribution pipe and liquid distribution holes, the flow direction of the fluid inside the heater is changed, so that the fluid is evenly distributed in the heater and flows towards the bottom of the heater, enabling impurities in the crude oil to be continuously carried away by the fluid, and solving the problem of overheating and damage of the heater caused by sand accumulation at the bottom of the conventional electric heating device.

[0008] The technical solution adopted by this utility model is specifically as follows: An electric heater device for crude oil heating

[0009] includes a heating tube body; a liquid distribution pipe is provided below the heating tube body, and two groups of liquid distribution holes are opened on the bottom side wall of the liquid distribution pipe, and the two groups of liquid distribution holes are symmetrically arranged along the central axis of the liquid distribution pipe.

[0010] Further, one end of the heating tube body is sealed with a blind plate.

[0011] Further, a crude oil inlet is provided below the heating tube body, and the crude oil inlet is vertically arranged and communicated with the liquid distribution pipe.

[0012] Furthermore, an oil inlet / outlet is provided at the upper part of the heating pipe body, and the oil inlet and the oil inlet / outlet (11) are arranged corresponding to each other and are both located in the middle of the heating pipe body.

[0013] Furthermore, a safety valve interface is provided at the upper part of the heating pipe body, and the safety valve interface is arranged close to the blind plate seal.

[0014] Furthermore, two discharge ports are provided at the lower part of the heating pipe body, and the two discharge ports are respectively located on each side of the oil inlet.

[0015] Furthermore, the total cross-sectional area of the liquid distribution pipe, the total cross-sectional area of the liquid distribution holes, and the cross-sectional area of the liquid inlet are the same.

[0016] The technical effects achieved by this utility model are as follows:

[0017] 1. Avoid the deposition of impurities in the crude oil at the bottom of the heater, and prevent the local heating pipe from overheating and being burned out;

[0018] 2. Avoid the accumulation of gas in the crude oil at the upper part of the heater, and prevent the local heating pipe from overheating and being burned out;

[0019] 3. Adopt a blind plate head, which is convenient to open the blind plate for internal inspection and cleaning of impurities;

[0020] 4. Enable the heater to work continuously and ensure the stability of the crude oil production process. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the problems existing in the use of the existing crude oil heater;

[0022] Figure 2 is a schematic structural diagram of the present utility model.

[0023] In the drawings, the list of components represented by each reference numeral is as follows:

[0024] 1. Heating pipe body; 11. Liquid inlet / outlet; 12. Liquid inlet / outlet; 13. Safety valve interface; 14. Discharge port; 2. Liquid distribution pipe; 21. Liquid distribution hole; 3. Blind plate. Detailed Embodiments

[0025] In order to make the purpose and advantages of this utility model clearer, the following specifically describes this utility model in conjunction with the embodiments. It should be understood that the following text only describes one or several specific implementation manners of this utility model, and does not strictly limit the specific protection scope claimed by this utility model.

[0026] As Figure 2 shown, the technical solution adopted by this utility model is specifically as follows: An electric heater device for heating crude oil, including a heating pipe body 1;

[0027] A liquid distribution pipe 2 is provided at the lower part of the heating pipe body 1. Two groups of liquid distribution holes 21 are opened on the bottom side wall of the liquid distribution pipe 2. The two groups of liquid distribution holes 21 are symmetrically arranged along the central axis of the liquid distribution pipe 2. Among them, the two groups of liquid distribution holes 21 are respectively located at the 8 o'clock and 4 o'clock directions of the liquid distribution pipe 2, so that the well fluid flows downward below the heating pipe body 1, flushing the bottom of the heating pipe body 1, and enabling impurities to be carried out of the heating pipe body 1 along with the well fluid flow.

[0028] One end of the heating pipe body 1 is sealed with a blind plate 3.

[0029] A crude oil inlet 11 is provided at the lower part of the heating pipe body 1. The crude oil inlet 11 is vertically arranged and communicated with the liquid distribution pipe 2.

[0030] A crude oil outlet 12 is provided at the upper part of the heating pipe body 1. The crude oil inlet 11 and the crude oil outlet 12 are correspondingly arranged and both are located in the middle of the heating pipe body.

[0031] To ensure that the processing capacity of the heater remains unchanged, the total cross-sectional area of the liquid distribution pipe 2, the total cross-sectional area of the liquid distribution holes 21, and the cross-sectional area of the inlet 11 should be the same.

[0032] A safety valve interface 13 is provided at the upper part of the heating pipe body 1. The safety valve interface 13 is arranged close to the blind plate seal.

[0033] Two discharge ports 14 are provided at the lower part of the heating pipe body 1. The two discharge ports 14 are respectively located on each side of the crude oil inlet 11.

[0034] In this embodiment, different liquid inlet methods are adopted. By changing the flow direction of the fluid inside the heater, the fluid is evenly distributed in the heater and flows downward to the bottom of the heater, enabling the impurities in the crude oil to be continuously carried away by the fluid, and avoiding overheating damage of the heater caused by sand accumulation at the bottom. And a blind plate design is adopted at the welded head at the tail of the heater, which is convenient for opening to clean impurities.

[0035] The above is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model, without special instructions and limitations, are implemented according to the conventional means in this field.

Claims

1. An electric heater device for heating crude oil, comprising a heating tube body (1), characterized in that: A liquid distribution pipe (2) is provided at the lower part of the heating pipe body (1), and two groups of liquid distribution holes (21) are formed in the bottom side wall of the liquid distribution pipe (2), and the two groups of liquid distribution holes (21) are symmetrically arranged along the central axis of the liquid distribution pipe (2).

2. The electric heater device for crude oil heating according to claim 1, characterized in that: One end of the heating pipe body (1) is sealed by a blind plate (3).

3. The electric heater device for crude oil heating according to claim 1, characterized in that: A crude oil inlet (11) is provided at the lower part of the heating pipe body (1), and the crude oil inlet (11) is vertically arranged and communicated with the liquid distribution pipe (2).

4. The electric heater device for crude oil heating according to claim 1, wherein: A crude oil outlet (12) is provided at the upper part of the heating pipe body (1), and the crude oil inlet (11) and the crude oil outlet (12) are correspondingly arranged and both are located in the middle of the heating pipe body.

5. The electric heater device for crude oil heating according to claim 1, wherein: A safety valve interface (13) is provided at the upper part of the heating pipe body (1), and the safety valve interface (13) is arranged close to the blind plate for sealing.

6. The electric heater device for crude oil heating according to claim 1, characterized in that: Two discharge ports (14) are provided at the lower part of the heating pipe body (1), and the two discharge ports (14) are respectively located on each side of the crude oil inlet (11).

7. The electric heater device for crude oil heating according to claim 3, wherein: The total cross-sectional area of the liquid distribution pipe (2), the total cross-sectional area of the liquid distribution holes (21), and the cross-sectional area of the inlet (11) are the same.

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