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Cooling device and method for dissipating heat of heat-generating part of downhole instrument

A technology for downhole instruments and heating components, which is applied in wellbore/well components, earthwork drilling, construction, etc. It can solve problems such as detection failure and instrument detection performance degradation, and achieve fast heat dissipation and cooling speed, easy to popularize and use, and structural structure simple effect

Inactive Publication Date: 2019-04-16
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In some cases, this heat dissipation may lead to poor detection performance or detection failure of the instrument

Method used

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  • Cooling device and method for dissipating heat of heat-generating part of downhole instrument
  • Cooling device and method for dissipating heat of heat-generating part of downhole instrument
  • Cooling device and method for dissipating heat of heat-generating part of downhole instrument

Examples

Experimental program
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Effect test

Embodiment approach

[0017] Such as figure 1 Shown is an exemplary embodiment of a downhole formation fluid sampling instrument 50 of a downhole facility for sampling fluid from a subterranean formation 10 , hereinafter referred to as the downhole instrument 50 . Downhole tool 50 is conveyed within wellbore 11 into subterranean formation 10 and pumps formation fluid from formation 10 during subsequent clean-up operations, after which a sample of the formation fluid is collected in sample container 74 .

[0018] In the example shown, the downhole tool 50 is carried in the wellbore 11 by a wireline 52 , that is, a multi-conductor wireline wound by a winch 54 is lowered from the borehole surface 12 . Well site 52 may be electrically field coupled to well site surface equipment 56 for communicating various control signals and logging information between downhole tools 50 and well site surface equipment 56 .

[0019] Downhole tool 50 includes probe module 58 , pump out module 60 and sample module 62 ....

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Abstract

The invention discloses a cooling device and method for dissipating heat of a heat-generating part of a downhole instrument. The cooling device comprises a chassis fixed in a casing of a downhole instrument by a connecting member and made of a heat-conducting material, a heat-generating electrical part mounted on the chassis, and a pipeline longitudinally extending through a cylindrical channel longitudinally formed in the chassis and the connecting member and made of a heat-conducting material, wherein the outer wall of the pipeline is in contact with the inner surface of the cylindrical channel, the tail end of the pipeline is communicated with a probe arranged on the outer side of the bottom of the casing of the downhole instrument, a pump arranged in the casing of the downhole instrument is connected to the portion, between the probe and the chassis, of the pipeline, and the top end of the pipeline extends into an outlet formed in the upper portion of the casing of the downhole instrument. A fluid is pumped from a stratum to the pipeline through the pump in the casing of the downhole instrument, the fluid in the pipeline executes heat exchange with the chassis when passing through the chassis, and the purpose of heat dissipation and cooling of the heat-generating electrical part is achieved.

Description

technical field [0001] The invention relates to the field of cooling of downhole tools, in particular to a cooling device and method for heat dissipation of heating components of downhole tools. Background technique [0002] Different instruments such as downhole tool strings or downhole tools may be used to evaluate formations or perform other tasks during or after drilling operations. Electronic or moving parts of these instruments emit heat. In some cases, this heat dissipation may cause the instrument to perform poorly or fail to detect. This is exacerbated when the instrument is used in a high temperature well. [0003] Therefore, it is urgent to study cooling devices and methods for heat dissipation of heat-generating components of downhole instruments. Contents of the invention [0004] The purpose of the present invention is to solve the deficiencies in the prior art, to provide a cooling device and method for heat dissipation of heat-generating components of do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/017E21B49/08
CPCE21B49/081E21B49/088E21B47/017
Inventor 周静熊浏谢海明尚海燕傅钢燕并男雷诚傅杰
Owner XI'AN PETROLEUM UNIVERSITY
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