Wire-line coring drilling tool and coring method thereof

Abstract

The invention relates to the field of drilling sampling equipment, in particular to a wire-line coring drilling tool and a coring method thereof. The wire-line coring drilling tool comprises an outer pipe assembly, an inner pipe assembly arranged in the outer pipe assembly and a fishing mechanism used for fishing the inner pipe assembly; the outer pipe assembly comprises a drill rod, the inner pipe assembly comprises a core pipe arranged in the drill rod and a connector structure connected with the core pipe, the connector structure abuts against the inner wall of the drill rod, and the fishing mechanism is connected with the connector structure; the coring process is completed through the steps of hooking the inner pipe assembly, lifting the inner pipe assembly and releasing the inner pipe assembly. According to the wire-line coring drilling tool, the whole structure is simple, cooperation between the structures is stable, the failure rate is low, disturbance of the core pipe during sampling can be prevented in the sampling process, separation from the drill rod in the coring process can be easily realized, the situation that coring cannot be carried out due to the fact that the inner pipe assembly and the outer pipe assembly are stuck is avoided, automatic unhooking can be completed without manual intervention, and the operation process is simple and efficient.

Description

technical field [0001] The invention relates to the field of drilling and sampling equipment, and more particularly, to a wire-line core drilling tool and a core-taking method thereof. Background technique [0002] Drilling sampling is the technology of using drilling equipment to obtain samples in the stratum. By analyzing the composition of the samples to understand the resources contained in the stratum, it is very important for the future development of human beings. Currently, it is mainly used in land geological exploration, deep seabed drilling and space resources. probe. [0003] In order to improve the efficiency of drilling and coring and reduce the cost of sampling, most drilling uses the method of wire-line coring, especially in complex drilling environments, the extraction of samples may be affected by the drilling depth. It is not necessary to extract all the drill pipes during core, but to salvage the core pipe with the sample through a special fisher. [00...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the above-mentioned technical problems in the prior art that the drilling tool structure is complicated, the cooperation between the inner pipe and the outer pipe is easy to get stuck, the core is difficult to take out, and manual assistance is required for decoupling, the present invention provides a drilling tool with a simple structure, and the inner pipe and the outer pipe are not easy to get stuck. , Efficient decoupling wireline coring drilling tool and coring method thereof

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