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Downhole fluid electric heater

An electric heater and heater technology, applied in wellbore/well components, isolation devices, earthwork drilling and production, etc., can solve the problems of poor sealing effect of the heater outlet, large fluid pressure loss, and low heating rate, and achieve improved Outlet sealing effect, reduction of pressure loss, and effect of increasing heating rate

Active Publication Date: 2018-09-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new type of electric heater for downhole fluid, which solves the problems of low heating rate, large fluid pressure loss and poor sealing effect of heater outlet in existing downhole heaters.

Method used

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  • Downhole fluid electric heater
  • Downhole fluid electric heater

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Embodiment Construction

[0023] see figure 1 and figure 2 As shown, the present invention includes a housing 1, a central tube 2, a continuous spiral baffle 3, a heating rod 4, an eddy current coil 5, an insulating layer 6, a sealing cover 7, a junction box 8 and a one-way valve 9;

[0024] The upper part of the housing 1 is provided with a tapered internal thread, which is used to connect with the central pipe 2 and acts as a seal; the outer side of the tapered internal thread is provided with a power line hole for passing through the power line; the lower part of the tapered internal thread is provided with There is a step for placing a gasket 11 to seal the joint between the housing 1 and the central tube 2 . The lower part of the housing 1 is provided with a tapered external thread for connecting with the one-way valve 9; the lower part of the housing 1 is provided with a tapered hole for cooperating with the upper valve body 92 to seal the outlet of the heater to prevent downhole fluid from re...

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Abstract

The invention discloses a downhole fluid electric heater which comprises a shell, a central pipe, a continuous spiral baffle plate, a heating rod, an eddy current coil, an insulating layer, a sealingcover, a junction box and a one-way valve. A fluid is indirectly heated through the eddy current effect, the eddy current effect is combined with a heat exchange structure of the continuous spiral baffle plate, thus the heating efficiency of the downhole fluid is improved, and the heating rate of the downhole fluid is increased. In the heater downhole operation process, second-level linkage sealing of an outlet of the heater is achieved by changing an input current, and thus the downhole fluid can be effectively prevented from flowing back to the heater.

Description

technical field [0001] The invention relates to an electric heater for downhole fluid, and relates to the fields of unconventional energy sources such as oil shale, heavy oil, heavy oil, oil sand, and natural gas hydrate. Background technique [0002] The current utilization technologies of underground hydrocarbon resources are divided into surface utilization technologies and in-situ conversion technologies. Surface utilization technology is a relatively mature underground hydrocarbon resource development technology at present, but surface utilization technology has disadvantages such as high mining costs, large air and groundwater pollution, and large water consumption; it is not suitable for deep hydrocarbon resource exploitation. In-situ conversion technology refers to the in-situ heat treatment of underground hydrocarbon deposits to pyrolyze underground hydrocarbon resources. The in-situ conversion technology has the advantages of not damaging the surface, no pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B36/04
CPCE21B36/04Y02E10/10
Inventor 郭威王振东孙友宏李强邓孙华张鹏宇赵帅陈强刘召
Owner JILIN UNIV