Drilling and coring device for any well section

Abstract

The invention relates to the technical field of a drilling coring tool, in particular to a drilling coring device of any well section. The drilling coring device comprises a starting order receiving-transmitting short section, a coring tool, a whipstock and an anchoring short section, which are sequentially distributed from top to bottom, wherein the lower part of the starting order receiving-transmitting short section capable of recognizing the pressure variation of slurry in an inner cavity and transmitting a wireless signal is fixedly installed together with the upper part of the coring tool, the outer side of the lower part of the coring tool is arranged on the inner side of the upper part of the whipstock, and the coring tool is fixedly connected with the whipstock through a cutting bolt; the lower part of the whipstock is fixedly installed on the upper part of the anchoring short section capable of being anchored or released after receiving the wireless signal transmitted by the starting order receiving-transmitting short section. The drilling coring device is reasonable and compact in structure, simple and convenient to operate, and capable of being anchored on any position in a well through the anchoring short section, so that the coring tool can complete the coring operation of any well section under the guide effect of the whipstock, the development process can be accelerated, the development period is shortened, and the development risk can be favorably reduced.

Description

technical field [0001] The invention relates to the technical field of drilling and coring tools, and relates to a drilling and coring device for any well section. Background technique [0002] In the process of petroleum geological exploration, at present, the formation prediction of the block to be constructed is carried out by relying on geological survey, seismic and other geophysical means, and then through drilling and geological logging, electrical measurement and other methods in the drilling process to determine whether the With development value, if necessary, it is necessary to conduct accurate analysis and confirmation of the physical properties of the formation through geological coring. However, the disadvantage of this method is that the prediction of strata is based on geological survey, seismic and other geophysical means, and there are deviations in the identification of strata, and there are still problems in stratum identification through geological loggi...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a drilling and coring device for any well section, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problems existing in the existing drilling and coring technology. It is impossible to take coring at any position, and after drilling beyond the target layer, it is necessary to re-deploy the well and take coring, which prolongs the development cycle and time, and greatly increases the development cost and risk

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