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Heating device

A technology of heating device and electric heating element, which is used in isolation devices, cleaning appliances, wellbore/well parts, etc. small amount of effect

Pending Publication Date: 2021-10-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem of using dumping hot oil in the dredging process of the existing oil and gas wells, the cost of dredging is too high, and the workload of dredging is large and the efficiency is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 1 It is a schematic structural diagram of a heating device provided in this embodiment. Such as figure 1 As shown, the heating device includes a heat conducting shell 10 , an electric heating element 20 and a power supply 30 . The inside of the heat conduction shell 10 has a sealable cavity, and the outside of the heat conduction shell 10 can be in various shapes.

[0042] In some implementation manners, the heat conduction housing 10 may be configured as a vertical cylindrical structure. It should be noted that the "tubular structure" here is to be understood in a broad sense, that is, the cross-section of the cylindrical structure is not limited to a circle, and the dimensions of the cross-sections of the cylindrical structure may be equal or different. In addition, "vertical setup" means that the figure 1 As an example, the axis of the cylindrical structure generally extends in the up and down direction shown in the figures.

[0043] It is worth mentionin...

Embodiment 2

[0070] Figure 8 for Figure 6 Another partially enlarged schematic diagram in , such as Figure 6 and Figure 8 shown. On the basis of the first embodiment, this embodiment also provides a slide rail 70 and a slider 80 . The sliding rail 70 is disposed on the inner wall of the bottom case 101 , the extending direction of the sliding rail 70 is parallel to the axial direction of the heat conduction housing 10 , and the sliding rail 70 is fastened to the inner wall of the bottom case 101 . It is easy to understand that the slide rail 70 and the bottom case 101 can be connected in various ways, for example, the two can be connected by welding or screws.

[0071] Continue to refer to Figure 6 and Figure 8 , the slide rail 70 is provided with a slide block 80 matching with the slide rail 70, the slide block 80 is slidably connected with the slide rail 70, that is to say, the slide block 80 can be extended in the direction of the slide rail 70, namely Figure 6 Slide up an...

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Abstract

The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a heating device. The heating device is used for dredging an oil and gas well, and comprises a heat conduction shell, an electric heating element and a power supply; the heat conduction shell can move up and down in the oil and gas well through traction of a traction mechanism, and a sealable cavity is formed in the heat conduction shell; the electric heating element is arranged in the cavity and is at least in heat-conducting contact with a part of the inner wall of the heat conduction shell so as to transfer heat to the heat conduction shell; and the power supply is electrically connected with the electric heating element and is used for supplying power to the electric heating element. Substances attached to the well wall of the oil and gas well are heated through the heating device to be dissolved, the heating device is used for dredging the oil and gas well, can be repeatedly used and is low in cost, only the traction mechanism is needed to control the heating device to move in the oil and gas well in the dredging process, the workload is small, and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploitation, and in particular relates to a heating device for dredging oil and gas wells. Background technique [0002] In the process of oil and gas field exploitation, it is necessary to regularly maintain, wax remove, and well test the oil and gas wells and formations formed after drilling. However, in the actual production process, tool strings such as weighted rods and well gauges often encounter obstacles at the wellhead or in the well, so they cannot pass through normally. Generally speaking, when there are hydrates, wax plugs, colloidal asphaltene, heavy oil, and other foreign matter attached to the wellhead or in the well, the tool string will be blocked. [0003] In related technologies, in order to solve the problem of clogging, hot oil is used to dredge, that is, the heat of hot oil is used to melt substances such as hydrates, waxes, heavy oil, etc. attached to the well wall of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B36/04E21B37/00
CPCE21B36/04E21B37/00
Inventor 张洁刘勇于志楠补璐璐卢刚黄腊梅刘传家
Owner PETROCHINA CO LTD