A core cutting device for natural gas hydrate transfer system under pressure
A technology of transfer system and cutting device, which is applied in the direction of extracting undisturbed core devices, wellbore/well components, buildings, etc., can solve problems such as difficulty in implementing core cutting devices, and achieve the effects of simple structure, small core disturbance and accurate positioning.
Inactive Publication Date: 2021-02-09
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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Problems solved by technology
Due to the high pressure of the pressure transfer system, it is very difficult to realize the core cutting device of the pressure transfer system
Method used
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Embodiment
[0034] A core cutting device for a gas hydrate transfer system under pressure, such as figure 1 and figure 2 shown. It is composed of an outer pipe assembly, a guillotine mechanism, a monitoring mechanism, a catcher 2, a rock core 4 and a rock core liner 3 and the like.
[0035]The core cutting device is a key component of the gas hydrate transfer system under pressure, and its right side is connected with the pressure core pipe through a ball valve (the ball valve and the core pipe are in the figure 1 not shown in).
[0036] according to figure 1 All the parts are installed, and the electric push rod 26 is manipulated simultaneously, so that the guillotine 7 is in the uppermost position. Maintain the system pressure, open the ball valve connected to the right side of the core cutting device, the catcher 2 enters the core pipe after passing through the ball valve, grabs the core liner 3, and slowly drags the core liner 3 and the core 4 in the liner into the The inner cav...
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The invention discloses a core cutting device for a natural gas hydrate transfer system under pressure. The core cutting device is a related part of the natural gas hydrate transfer system under pressure. The right side of the device is connected with a pressure core pipe through a ball valve; The core cutting device includes an outer tube assembly, a guillotine mechanism, a monitoring mechanism, a catcher, a rock core and a core liner. The outer tube assembly is a hollow tubular structure for accommodating the core and the core liner. The core is located in the core liner; The catcher is located inside the outer tube assembly and is used to grab the core liner; the guillotine mechanism is located in the direction perpendicular to the central axis of the outer tube assembly and is used to cut the core and the core liner; the monitoring mechanism is located in the outer tube assembly At the pipe wall, it is used to monitor, display and store the picture inside the outer pipe assembly. The invention has the advantages of simple structure, visualized operation, precise positioning, fast cutting and little disturbance to the rock core.
Description
technical field [0001] The invention belongs to the technical field of natural gas hydrate development, and in particular relates to a core cutting device used in a pressure transfer system of natural gas hydrate. Background technique [0002] Gas hydrate, also known as "combustible ice", is an ice-like crystalline substance distributed in deep-sea sediments or permafrost in land areas, formed by natural gas and water under high-pressure and low-temperature conditions. Because its appearance is like ice and it can burn when exposed to fire, it is also called "combustible ice". Its resource density is high, the global distribution is wide, and it has extremely high resource value, so it has become a long-term research hotspot in the oil and gas industry. [0003] Natural gas hydrate is a high-quality and efficient fuel. Since the 21st century, the exploration, development and utilization of natural gas hydrates have become the focus of global competition. The research and r...
Claims
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IPC IPC(8): E21B25/10E21B43/01E21B47/002
CPCE21B25/10E21B43/01
Inventor 卢春华蒋国盛宁伏龙张凌张涛刘志超郑君
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)