Automatically-controlled high-stability pressure-maintaining core-removing device

Abstract

The invention relates to an automatically controlled high-stability pressure-maintaining coring device, which comprises a pressure-maintaining outer cylinder, a pressure-maintaining inner cylinder, a flip cover, a slider and a spring; The inner wall of the top protrudes outwards to form a convex part of the outer cylinder, and the middle and lower part of the convex part of the outer cylinder is provided with a trapezoidal valve port along the circumferential direction; a sealing ring is embedded inside the trapezoidal valve port; The protrusion of the inner cylinder is formed by protruding outward; the pressure-holding inner cylinder is located between the outer wall of the lower side of the protrusion of the inner cylinder and the installation groove to form a cover chamber; the middle and upper outer walls of the pressure-holding inner cylinder and the pressure-holding outer cylinder A spring accommodating cavity is formed between the inner wall of the middle section and the upper section; the convex part of the inner cylinder is equidistantly provided with key grooves along the circumference; the flip cover is matched and accommodated in the flip cover accommodating cavity; in the spring chamber. The invention has simple and reasonable structural design, good sealing performance, convenient and reliable operation and use.

Description

technical field [0001] The invention belongs to the field of pressure-holding equipment, and in particular relates to an automatically controlled high-stability pressure-holding coring device. Background technique [0002] The formation pressure in deep and deep sea areas is high. When sampling the rock formations in this area, in order to ensure that the collected rock samples are still in a high-pressure environment after reaching the ground, it is necessary to use the pressure-holding core barrel to store and transport the samples. The pressure-holding coring cylinder is hoisted vertically into the deep coring area. When the rock sample is pulled into the pressure-holding cylinder, the pressure-holding cylinder is flipped and closed to form a high-pressure environment inside the cylinder. There is usually a large amount of fluid in the deep abyssal area, so the maintained pressure often exists in the form of water pressure. Since the sampling area is located in a deep ar...

AI Technical Summary

Problems solved by technology

After the cover of the pressure-holding cylinder is closed, a closed pressure-holding environment is formed. It is necessary to make the cover have a certain pre-tightening pressure to prevent the pressure-holding failure caused by the gap around the cover when the pressure difference between the inside and outside of the pressure-holding cylinder is small.

Most of the traditional clamshells rely

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