Device for petroleum geology sampling

Abstract

The invention discloses a device for petroleum geology sampling, and relates to the technical field of geological prospecting tools. The device comprises a drill cylinder and an operating rod, whereinthe operating rod is rotationally mounted on the top surface of the drill cylinder, the inner side surface of the drill cylinder is provided with two cutting placement grooves at the position close to the bottom end, one end of each cutting placement groove is provided with a through hole, the through holes extend in the side wall of the drill cylinder to the top surface of the side wall of the drill cylinder, a cutting rope is fixed at the end, which is away from the through hole, of each cutting placement groove, and the tail end of each cutting rope penetrates through the through hole andthen is wound on the operating rod. When the device is in use, the drill cylinder is pressed into soil through the operating rod, the operating rod is rotated to pull the cutting ropes after the soilcompletely enters the drill cylinder, and the cutting ropes are straightened and cut off the soil, so that the drill cylinder can be easily pulled out, the disturbance on the obtained soil is very small, and the actual soil state can be maintained.

Description

technical field [0001] The invention relates to the technical field of geological exploration tools, in particular to a petroleum geological sampling device. Background technique [0002] Petroleum geology is a branch of geology, the main task is to study the generation, migration and accumulation of oil and gas in the geological environment. Since many experiments must be done in the laboratory, it is necessary to collect geological samples and bring them back to the laboratory. At present, the commonly used sampling tool is a sampler, and the form of the sampler is different depending on the sampling object. [0003] Soil is an important sampling object in geological sampling. Since most of the soil is relatively soft, the soil sampler is used as a soil drill. The soil drill consists of a handle and a drill bit. When using the handle, press the drill bit into the soil. The soil that has entered the drill bit can be brought out when the drill bit is pulled out. [0004] T...

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Problems solved by technology

[0004] The structure of the above-mentioned soil drill is very simple, and there are many products with relatively more complex structures on the market, but the principle of use is that the air inside the drill bit is squeezed out after the soil enters the drill bit, and a negative pressure is formed inside the drill bit when the drill bit is lifted upwards. pull the soil apart

This sampler can cope with general sampling tasks, but when it is necessary to take undisturbed soil, because the soil is squeezed by the air inside the drill bit when it enters the drill bit, and the soil is pulled by negative pressure when the drill bit is pulled out, the soil taken out has been disturbed, so this sampler cannot be used to sample undisturbed soil

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