Ultrahigh-pressure and high-temperature rock core sample transfer system and working process thereof

Abstract

The invention relates to an ultrahigh-pressure and high-temperature rock core sample transfer system and a working process thereof. The ultrahigh-pressure and high-temperature rock core sample transfer system comprises a transfer cabin, wherein the transfer cabin is an annular pressure-resistant cabin, a switch valve is installed on one end of the transfer cabin in a sealed mode, an oil cylinder is connected to the other end of the transfer cabin in a sealed mode, a piston rod of the oil cylinder penetrates through a cabin cover of the transfer cabin and then enters the transfer cabin, a rotating handle is installed at the tail of the oil cylinder in a matched mode, and a water cooling sleeve is installed on the outer wall surface of the oil cylinder in a matched mode; and a coring cabin or a preparation cabin is connected to the outer end of the switch valve in a sealed mode, a rock core is arranged in the coring cabin, a clamping mechanism is arranged at the head of the rock core, and the clamping mechanism corresponds to and is matched with the piston rod, so that the huge friction force between the sample rock core and a sealing element when the sample rock core is taken out of the coring cabin can be overcome in the ultrahigh-pressure and high-temperature state, and the transfer of the rock core sample is realized.

Description

technical field [0001] The invention relates to the technical field of sample transfer equipment, in particular to an ultrahigh-pressure high-temperature core sample transfer system and its working process. Background technique [0002] Sustained, safe and green energy supply is the basic guarantee for rapid economic development. With the gradual depletion of shallow resources, resource development continues to move to the deep part of the earth, and the exploitation of deep resources has become a new normal. The basic theoretical research has become an important symbol of the world's mining power. [0003] In the prior art, the research method for the characteristics of deep coal rocks is to use coring technology for deep sampling, and then conduct analysis and research in the laboratory. This process is divided into three steps: in-well collection, transfer to the laboratory, and laboratory Sample segmentation studies. According to the existing theory, for every 100m dro...

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Problems solved by technology

[0005] The existing pressure-holding core transfer device and method, and a pressure-holding transfer device for natural gas hydrate core samples are all attempts to solve this problem, but neither of them can provide a large pulling force in principle to overcome the ultra-high pressure. Significant friction between the ambient rough core sample and the radial seal

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