Drill stem type hydrate probe boring sampling apparatus

Abstract

The invention relates to a drilling column type hydrate boring sampler. An upper joint, a connecting rod, a ball hanging mechanism, a pull rod, a piston and a heat-insulation pressure-maintenance cylinder are connected to form an internal combination; the upper joint, a reducer union, a differential device and a shell are connected to form an external combination; and a control system, a pressure compensation device, a sample protecting cylinder and a ball valve are arranged in the heat-insulation pressure-maintenance cylinder. When the device carries out boring sampling operation, a drilling tool is driven to rotate by equipment on the ground, and a boring drill bit works to achieve the aim of boring sampling. The drilling column type hydrate boring sampler can carry out boring sampling by a conventional drilling tool, is mainly applicable to heat-insulation pressure-maintenance sampling operation in a hard formation, not only can acquire a hydrate sample in the hard formation, but also is applicable to boring sample of an oil layer. The drilling column type hydrate boring sampler has the advantages of convenient use and wide application range, does not need replacing the drilling tool again and again so as to save boring cost.

Description

technical field [0001] The invention belongs to a special device for hydrate exploration and development, and is mainly suitable for pressure-preservation and heat-preservation sampling operations of hard rock formations in the sea or on land. 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, and even if they have the function of heat preservation and pressure preservation, there is no pressure and temperature recording device. sampling needs for geophysical prospecting. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[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, and even if they have the function of heat preservation and pressure preservation, there is no pressure and temperature recording device. Sampling needs for geophysical prospecting

Images