Grinding type anti-drop rock sampling device and use method thereof

Abstract

The invention relates to a grinding type anti-drop rock sampling device for a coring operation and a use method thereof, and aims at solving the problem of low rock core cutting rate. The technical scheme of the grinding type anti-drop rock sampling device is that limit tubes are inserted into the inner cavity of an outer tube, one end of a sliding pin is fixed in a pinhole in the middle of the outer tube, and the other end of the sliding pin is capable of sliding in a sliding slot of the outer circle of the limit tube; the outer circle of an inner tube is sleeved with a rotor, and the rotor and the inner tube as a whole are inserted into the inner cavity of the outer tube; three claws are sequentially and respectively arranged in three oblique holes at the lower portion of the inner tube,and the claws are stuck in the oblique holes at the lower portion of the inner tube and slide in the oblique holes; the outer circle of the lower portion of the inner tube is sleeved with a sliding sleeve, the upper end surface of the sliding sleeve is in contact with the step surface of the outer side of the claw, and springs b are arranged in the lower end surface of the sliding sleeve; the lower end of a bearing seat is in threaded connection with the upper end of the inner tube, and guiding heads are in threaded connection with the lower end of the inner tube. According to the grinding type anti-drop rock sampling device, a rock core can be taken out after being ground and cut, and the breaking of the rock core is effectively prevented, and the grinding type anti-drop rock sampling device is especially applicable to cutting out extremely hard rock cores.

Description

technical field [0001] The invention relates to a grinding type anti-dropping rock sampling device for coring operations in the petroleum and natural gas industry and a use method thereof, in particular to a core cutting operation in cooperation with a coring tool during the core cutting operation. Background technique [0002] In the development process of the oil and gas industry, in order to understand the geological conditions of oil and gas reservoirs, it is necessary to carry out exploration operations on oil and gas reservoirs. Usually, it is necessary to perform coring operations on different layers of underground rocks according to the designed well depth. Rock core is the primary data obtained in the process of petroleum exploration and development. Only through the analysis and research of rock core can we formulate a reasonable development plan, accurately calculate oilfield reserves, and formulate production increase measures. [0003] In order to obtain better ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is: in order to solve the problem of low core cutting rate during coring operations, a grinding type anti-dropping rock sampling device and its use method are provided.

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