High temperature and high pressure wellbore annulus closed space temperature and pressure variation simulation experiment device

Abstract

The invention discloses a high-temperature high-pressure pit shaft annular sealed space temperature and pressure change simulation experiment device, which comprises an upper end cover, a center pipe, an outer tube, a lower end sealed work tube, a sealing rod, an electric heater, a temperature and pressure sensor a, a temperature and pressure sensor b and a choke plug, wherein the electric heater is arranged in the center pipe; the center pipe is arranged in the outer tube in a sleeving way in a coaxial installation mode; the upper end cover is fixedly connected with an upper end opening of the outer tube and an upper end opening of the center pipe at the same time; the lower end sealing work tube is connected with a lower end opening of the outer tube; the temperature and pressure sensor b is used for monitoring the temperature and the pressure in a sealed space b of the center pipe; and the temperature and pressure sensor a is used for monitoring the temperature and the pressure in an annular sealed space a in the outer tube. The simulation experiment device can be used for accurately monitoring the temperature and pressure change of the sealed spaces after the heated expansion; and the simulation experiment device can also be used for monitoring the stress and strain change values of the center pipe and the outer tube after the sealed spaces are expanded through being heated.

Description

technical field [0001] The invention relates to an offshore well completion simulation experiment device, in particular to a temperature and pressure variation simulation experiment device for a high-temperature, high-pressure wellbore annular airtight space. Background technique [0002] At present, for the research device of temperature and pressure change in high temperature and high pressure double annular airtight space, it is mainly calculated by heat conduction formula, fluid mechanics formula and other related formulas, and the accuracy of the calculation results has yet to be verified. In order to accurately obtain the thermal expansion deformation of the confined space, a thermal expansion simulation device for the confined space of the wellbore was invented. Types of fluids, such as fresh water, sea water, different specific gravity completion fluids, mud, etc., so that different well conditions can be simulated. [0003] The purpose of the foregoing discussion i...

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Problems solved by technology

[0002] At present, the research device for the temperature and pressure change in the high-temperature and high-pressure double-annulus confined space is mainly calculated by heat conduction formula, fluid mechanics formula and other related formulas, and the accuracy of the calculation results has yet to be verified.

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