A shallow surface ball valve type high-fidelity deep-sea sediment sampler

Abstract

The invention relates to the field of earth surface drilling and sampling equipment and aims at providing a superficial layer spherical valve type fidelity deep-sea sediment sampling device. The superficial layer spherical valve type fidelity deep-sea sediment sampling device comprises a gravity sampling mechanism, a sealing mechanism and a buffering mechanism; the gravity sampling mechanism comprises a pressure-maintaining barrel mechanism, a lock tongue mechanism and a gas compensation barrel mechanism; the sealing mechanism comprises an upper sealing opening sealing mechanism and a lower spherical valve sealing mechanism; and the buffering mechanism comprises a bearing bottom plate and a framework top plate. According to the superficial layer spherical valve type fidelity deep-sea sediment sampling device, a sample pipe is arranged in a pressure-maintaining barrel so that the structure of the sampling device is simplified; meanwhile, the upper and lower ends of the sample pipe have a sealing function, particularly the lower spherical valve sealing mechanism is triggered by using a mechanical principle; and the superficial layer spherical valve type fidelity deep-sea sediment sampling device has a compact structure and can work stably, the operation difficulty is greatly reduced and the success rate is greatly improved.

Description

technical field [0001] The invention relates to the field of surface drilling and sampling equipment, in particular to a shallow surface ball valve type fidelity deep sea sediment sampler. Background technique [0002] Due to the unique physical properties of natural gas hydrate, its exploration and exploitation has always been an international problem. Foreign countries have entered the stage of commercial exploitation, while my country has just started and is still in the initial stage of exploration. In previous sampling procedures, hydrate samples had been partially or fully decomposed before reaching the surface. In order to preserve or experiment the retrieved hydrate samples, during the collection process, the samples need to maintain the temperature and pressure state at the sampling place. In order to meet the above storage conditions, the equipment and storage tools used for sampling need to meet the function of heat preservation and pressure preservation, that is...

AI Technical Summary

Problems solved by technology

[0003] At present, the fidelity sampling technologies commonly used at home and abroad mainly include: the pressure-holding sampling cylinder PCB of the international deep-sea drilling program, the pressure-holding corer PCS of the international ocean drilling program, and the integrated deep-sea sediment sampler. The existing sampler has a complex structure. Poor operability and other problems cannot meet the needs of my country's ocean exploration work, so designing a deep-sea sediment sampler suitable for my country's ocean exploration work has broad application prospects

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