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Downhole completion device with liquid

A liquid and shell technology, applied in wellbore/well components, measurement, earthwork drilling and production, etc., can solve problems such as endangering sensor functions and pressure rise

Inactive Publication Date: 2019-01-04
WELLTEC OILFIELD SOLUTIONS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor is usually contained in the housing, but when the temperature in the well increases, so does the pressure in the housing, which jeopardizes the function of the sensor

Method used

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  • Downhole completion device with liquid
  • Downhole completion device with liquid
  • Downhole completion device with liquid

Examples

Experimental program
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Effect test

Embodiment Construction

[0058] figure 1 Shown is a downhole completion 1 configured to be installed in a wellbore 30 as part of a metallic well tubular structure 2 . The downhole completion device 1 comprises a housing 3 enclosing a closed space 4 and electrical components 5 , such as coils 32 , arranged in the space inside the housing. The housing 3 is filled with a liquid 41 having a first volume V of 1 bar at 20°C 1 . The housing 3 has a first housing section 6 and a second housing section 7 . The first housing section 6 has a first thickness t 1 , the second housing section 7 has a second thickness t 2 , the second thickness is less than the first thickness such that the second shell section is more flexible than the first shell section. When the temperature in the well increases, the pressure in the enclosed space 4 increases correspondingly. This makes the second housing section 7 as figure 2 Protruding radially outwards towards the inside of the metal well tubular structure 2 to the ex...

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Abstract

The present invention relates to a downhole completion device configured to be mounted as part of a well tubular metal structure. The downhole completion device comprises a housing enclosing a closedspace, an electrical component arranged in the space inside the housing, the housing being filled with a liquid having a first volume of 1 bar at 20DEG C, wherein the housing has a first housing section and a second housing section, the first housing section having a first thickness and the second housing section having a second thickness, and the second thickness being smaller than the first thickness so that the second housing section is more flexible than the first housing section. Furthermore, the invention relates to a downhole completion system.

Description

technical field [0001] The present invention relates to a downhole completion configured to be installed as part of a metal well tubular structure. Furthermore, the present invention relates to downhole completion systems. Background technique [0002] When having downhole electrical components such as pressure or temperature sensors, the sensors are subjected to both high temperature and high pressure. The sensors are usually contained in the housing, but when the temperature in the well increases, so does the pressure in the housing, which jeopardizes the sensor's functionality. Contents of the invention [0003] An object of the present invention is to completely or partially overcome the above-mentioned disadvantages and deficiencies of the prior art. More particularly, it is an object to provide an improved downhole completion capable of housing and protecting electrical components from deterioration of their function. [0004] The above objects, as well as numerou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/01E21B47/06E21B41/00
CPCE21B47/01E21B47/06E21B23/06E21B23/08E21B33/1208E21B33/1285
Inventor C·克鲁格尔J·O·拉尔森
Owner WELLTEC OILFIELD SOLUTIONS AG
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