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High temperature and high pressure electrical stability tester

A high-voltage, stable technology, applied in the direction of testing dielectric strength, etc., can solve the problems of different mud and can not truly reflect the downhole situation, and achieve the effect of simple structure, good repeatability and accurate data

Inactive Publication Date: 2010-08-25
JINGZHOU MODERN PETROLEUM TECH DEV CO LTD
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AI Technical Summary

Problems solved by technology

Because the downhole temperature and pressure are higher than those on the ground, the performance of the mud in the downhole is different from that measured on the ground, so it cannot truly reflect the downhole situation.

Method used

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Embodiment Construction

[0011] The high-temperature and high-voltage electrical stability tester is composed of a pressurized valve 1, a probe electrode 3, a high-temperature kettle cover 4, a high-temperature kettle body 5, a heating sleeve 6, and a voltage control device 7. The outer wall of the high-temperature kettle body 5 is covered with Heating sleeve 6, high temperature kettle cover 4 is installed on the top of high temperature kettle body 5, high pressure seal 2 is installed between high temperature kettle cover 4 and high temperature kettle body 5, and two probe electrodes are arranged at the center of high temperature kettle cover 4 3. The electrodes of probe electrode 3 are made of silver alloy, and the electrodes are embedded in the high-temperature-resistant polytetrafluoroethylene probe, so that the insulation performance is very good. A high-pressure pipe is provided on the high-temperature kettle cover 4 on the side of the probe electrode 3, and a pressurization valve 1 is arranged on...

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Abstract

The invention relates to a high temperature and high pressure electrical stability tester which belongs to the technical field of properties of drilling fluid testing apparatuses and instruments. The tester comprises a high temperature kettle body, a measuring head electrode, a steam jacket, a voltage control device and the like, wherein the steam jacket is installed on the high temperature kettle body, a high temperature kettle cover is installed at the top of the kettle body and provided with the measuring head electrode and a pressurizing valve, and one side of the high temperature kettle body is provided with the voltage control device. In the tester, the heating of the steam jacket and the pressurizing of the pressurizing valve to a sample are controlled by an intelligent microcomputer temperature control device, the voltage fluctuation is automatically controlled, and therefore, the electrical stability of the drilling fluid is accurately judged. The tester solves the problems that a traditional electrical stability tester measures under the conditions of normal temperature and normal pressure, can not truly reflect the underground mining conditions, and can not be adapted to the needs of drilling deep wells or ultra deep wells. A power supply can be cut off through controlling a normally closed switch in time delay to achieve a safe protection function, and an emulsion-breaking voltage is measured under the condition of unattended operation through the hint of an alarm. The invention is suitable for measuring the electrical stabilities of various oil field drilling fluids.

Description

Technical field: [0001] The invention relates to a high-temperature and high-voltage electrical stability tester for drilling fluid, which belongs to the technical field of drilling fluid performance testing instruments and instruments. Background technique: [0002] At present, the electrical stability measurement of drilling fluid is carried out under normal temperature and normal pressure conditions. Because the downhole temperature and pressure are higher than those on the ground, the performance of the mud in the downhole is different from that measured on the ground, so it cannot truly reflect the downhole situation. With the continuous development of drilling technology, in order to meet the needs of drilling deep or ultra-deep wells, it has become an urgent problem to be solved in oilfield drilling to simulate the downhole conditions and measure the electrical stability of drilling fluid under high temperature and high pressure conditions. Invention content: [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 余维初任勋李志勇
Owner JINGZHOU MODERN PETROLEUM TECH DEV CO LTD
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