Experimental device for evaluating external pressure resisting intensity of anti-sand sieve tube

Abstract

The invention relates to an experimental device for evaluating external pressure resisting intensity of an anti-sand sieve tube. The experimental device comprises an autoclave, and the autoclave comprises an autoclave body. The autoclave body is of a tubular structure with the internal diameter larger than the external diameter of the to-be-evaluated anti-sand sieve tube. Openings at the two ends of the autoclave body are detachably connected with a first sealing cover and a second sealing cover respectively, the inner side of the first sealing cover is provided with an installing groove for fixedly embedding one end of the to-be-evaluated anti-sand sieve tube, a sealing pressing cover is fixedly arranged at the other end of the to-be-evaluated anti-sand sieve tube, the outer surface of the to-be-evaluated anti-sand sieve tube is coated with a sealant, and a drainage tube penetrates the middle of the first sealing cover. One end of the drainage tube is located on the inner side of the to-be-evaluated anti-sand sieve tube, and the other end of the drainage tube is located in a liquid receiving tank. The autoclave body is internally connected with a water outlet of a water injection pump through a pipeline, and a water inlet of the water injection pump is connected with a water outlet of a water storage tank through a pipeline. The autoclave body is internally connected with a high-pressure pump through a pipeline. The autoclave body is provided with a pressure release valve communicated with the inside of the autoclave body, and the autoclave body is provided with a pressure meter communicated with the inside of the autoclave body. According to the experimental device, the external pressure resisting intensity of the anti-sand sieve tube can be reflected.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to an experimental device for evaluating the anti-extrusion strength of a sand control screen pipe. Background technique [0002] The sand control screen works at the bottom of the well thousands of meters deep, and the comprehensive effect of formation rock, formation fluid and structural movement in its surrounding environment makes it bear huge external pressure. When the external pressure on the sand control screen exceeds the anti-extrusion strength of the sand control screen, the sand control screen will be irreversibly damaged, and it has been found in practice that the sand control screen is usually damaged due to extrusion. [0003] At present, when selecting sand control screens, the main consideration is the initial production and sand output of sand control, without considering the damage of sand control screens in the long-term production process and the ...

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Problems solved by technology

[0003] At present, when selecting sand control screens, the main consideration is the initial production and sand output of sand control, without considering the damage of sand control screens in the long-term production process and the output and sand output after damage, which is not conducive to selection. It is not conducive to improving the service life of the sand control screen and the economic index of the oil well after sand control

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