Electrical isolation unit for measuring rock resistivity
A technology of electrical isolation and resistivity, which is applied in the directions of voltage/current isolation, measurement of electrical variables, measurement of resistance/reactance/impedance, etc. It can solve problems such as short circuit at the upper and lower ends of rock cores, affecting the accuracy of rock resistivity measurement, etc.
Active Publication Date: 2014-11-05
PETROCHINA CO LTD
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Problems solved by technology
Since the pipelines connecting the two ends of the core during the measurement process are usually steel conductive pipelines, these pipelines are connected with displacement pumps, pressure sensors, ovens and other systems, which will generate additional resistance, and may even cause a short circuit between the upper and lower ends of the core, affecting the accuracy of rock resistivity measurement. Spend
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[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0018] figure 1 It is a schematic cross-sectional structure diagram of an electrical isolation unit for rock resistivity measurement according to an embodiment of the present invention. As shown in the figure, an electrical isolation unit in a preferred embodiment of the present invention includes: an electrical isolation unit main body 4, an insulating isolation inner lining 1, an insulating isolation body 2, a compression nut 3, a sealing ring 5, and an insu...
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The invention discloses an electrical isolation unit for measuring rock resistivity. The electrical isolation unit comprises an electrical isolation unit main body, an insulating isolator liner, an insulating isolator, a pressing screw cap, a sealing ring, an insulating isolating cap and a pipeline interface, wherein the electrical isolation unit main body is provided with a through cavity; a through hole is arranged at the top part of the insulating isolating cap; the insulating isolator liner is a metal conduit of which the front end is provided with a flange; the top part and the periphery of the insulating isolating cap are in sealing connection with the cavity of the electrical isolation unit main body; a flange of the insulating isolator liner abuts against the inner side of the insulating isolating cap; the insulating isolator is sleeved at the periphery of the insulating isolator liner; the flange of the insulating isolator abuts against the rear end face of the flange of the insulating isolator liner; the sealing ring is circularly arranged at the periphery of the flange of the insulating isolator liner and is used for connecting the insulating isolating cap and the insulating isolator; the pressing screw cap is sleeved at the periphery of the insulating isolator; one end of the pressing screw cap abuts against the rear end face of the flange of the insulating isolator and is screwed with the electrical isolating unit main body; and the pipeline interface is used for connecting metal pipelines with the cavity of the electrical isolating unit main body.
Description
technical field [0001] The invention relates to the field of rock resistivity measurement in the field of petroleum exploration, in particular to a rock resistivity measurement instrument, specifically an electrical isolation unit for rock resistivity measurement. Background technique [0002] The measurement and analysis of rock resistivity in the laboratory is an important means to find new logging methods and reasonably interpret logging data. Usually, the electrode method is used to measure the rock resistivity in the laboratory, including the two-electrode method and the four-electrode method. The specific method is to put the core saturated with brine into a special core holder, and then use the experimental oil to displace the water in the core through the displacement pump to reduce the water saturation, and measure the resistivity of the rock during the displacement process. Since the pipelines connecting the two ends of the core during the measurement process are ...
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IPC IPC(8): G01R27/02G01R15/14G01N27/04
Inventor 张祖波吕伟峰罗蔓莉陈序
Owner PETROCHINA CO LTD