Device for measuring combined action of washout and high-temperature corrosion of oil well tubular column

Abstract

The invention relates to a device for measuring a combined action of washout and high-temperature corrosion of an oil well tubular column. The device comprises a washout simulating box, a corrosion simulating box and a constant-flow pump, wherein the washout simulating box comprises a first box body, a support base fixed in the first box body, a rotating shaft supported on the support base, a roll sleeving the rotating shaft, a bearing platform connected to the top of the roll, a bracket groove connected to the top of the bearing platform, an angle dial connected onto the outer wall of the first box body, a clamping cutter connected onto the rotating shaft, and a discharging pipe connected to the bottom of the first box body; the corrosion simulating box comprises a second box body, a screen, a plurality of grooves formed in the side wall of an upper cavity, a carbon dioxide introducing pipe arranged outside the second box body, a funnel arranged at the top of the second box body and extending into the lower cavity, and a heating device coating the outer wall of the second box body, wherein one end of the carbon dioxide introducing pipe extends into an upper cavity; the lower end of the discharging pipe runs through the lower cavity and extends into the lower cavity; an inlet end of the constant-flow pump is connected with the lower cavity by means of a pipeline, an outlet end of the constant-flow pump is communicated with a sand blasting nozzle by means of a pipeline, and the sand blasting nozzle penetrates through the first box body of the washout simulating box.

Description

technical field [0001] The present invention relates to a measuring device, in particular to a measuring device for the joint action of oil well pipe string erosion, high temperature and corrosion, which can measure the erosion amount, corrosion amount and the difference between the erosion amount and the corrosion amount of the oil well pipe string under the combined action of erosion and corrosion . Background technique [0002] Oil well tubing strings (mainly including drill pipe, tubing, oil casing, sand control pipe, etc.) inevitably bear the high-speed erosion of multiphase flow (especially solid-liquid mixed) fluid and the corrosion of carbon dioxide in the tubing in the working environment. It will lead to thinning of the wall thickness of the equipment and a reduction in the bearing capacity, which will bring potential safety hazards. [0003] The experimental method is a method that can accurately predict the erosion and corrosion of oil well strings. At present, ...

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Problems solved by technology

[0004] The disadvantage of these two simulation devices is that they can only simulate the erosion of the experimental sample pipe by changing the fluid erosion rate, adjusting the erosion angle, etc., and cannot obtain the results under the combined action of erosion and corrosion in the same set of devices. Erosion amount, corrosion amount and increase amount under combined action of erosion and corrosion

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