Cable rotary type hydrate probe boring sampling apparatus

Abstract

The invention relates to a rope rotating type hydrate boring sampler, which comprises a catch head, a locking mechanism, a pull rod, a piston and a sample protecting cylinder which are connected through threads. The pull rod is fixed with a heat-insulation pressure-maintenance cylinder through a lockpin; a control system and a pressure compensation device are arranged in the heat-insulation pressure-maintenance cylinder; a hanger bearing, the heat-insulation pressure-maintenance cylinder, a ball valve body and a temperature pressure recorder are connected together; a core cutting mechanism is arranged in the sample protecting cylinder; the sample protecting cylinder and the piston are arranged in the heat-insulation pressure-maintenance cylinder; and a sampling drill bit and a shell are connected through threads. The whole device is arranged on the shell of the device through the locking mechanism; the shell is connected with a drilling tool to transmit torque and support weight of internal devices. When the device carries out sample boring operation, fluid fed by a pump on the ground flushes a borehole, and cleans the sampling drill bit; the shell rotates along with a drilling tool, while the heat-insulation pressure-maintenance cylinder and a sample protecting pipe do not rotate; the heat-insulation pressure-maintenance cylinder is retracted by a rope, so that time of the rock sample to the ground is shortened, thereby facilitating heat insulation and pressure maintenance of the rock sample.

Description

technical field [0001] The invention belongs to a special device for hydrate drilling and sampling, and is mainly applicable to the technical field of marine exploration. Background technique [0002] At present, the deep-sea sampling devices used in China are all non-drilling type, and the sampling depth is only 10 meters. They are mainly used to sample the sediments in the shallow layer of the seabed. The drilling and sampling of hard rock layers on the seabed have not yet been studied; some of the foreign ones are drilling type. However, they all have complex structures and unsatisfactory sampling effects. Most of them do not have the function of heat preservation and pressure preservation. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a rope-rotating hydrate drilling sampling device. During deep-sea drilling, the rope-rotating hydrate drilling sampling device can be used to obtain hydrate samples in hard ro...

AI Technical Summary

Problems solved by technology

[0002] At present, the deep-sea sampling devices used in China are all non-drilling devices, and the sampling depth is only 10 meters. They are mainly used to sample the sediments in the shallow layer of the seabed. Research on the drilling and sampling of hard rock layers on the seabed has not yet been carried out; some of the devices used abroad are drilling types. However, they all have complex structures and unsatisfactory sampling effects. Most of them do not have the function of heat preservation and pressure preservation.

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