Drilling coring device for weakly cemented soft rocks and method thereof

A drilling core and weakly cemented technology, which is applied in the direction of extracting undisturbed core devices, drill bits, drilling tools, etc., can solve the problems of weakly cemented soft rock disturbance, low coring success rate, small slag discharge space, etc., to reduce stuck The probability of drilling, the effect of reducing torque and large slag discharge space

Active Publication Date: 2018-09-18
ANHUI UNIVERSITY OF ARCHITECTURE
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Problems solved by technology

[0007] The purpose of the present invention is to provide a drilling coring device and method for weakly cemented soft rock, to at least solve the problem of large core torque and slag discharge space in the prior art for weakly cemented soft rock during drilling and coring. Small, disturbance to weakly cemented soft rock, low success rate of coring

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  • Drilling coring device for weakly cemented soft rocks and method thereof
  • Drilling coring device for weakly cemented soft rocks and method thereof
  • Drilling coring device for weakly cemented soft rocks and method thereof

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[0054] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0055] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation, so they cannot be understood as Limitations on the Invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, for example, it can be fixe...

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Abstract

The invention provides a drilling coring device for weakly cemented soft rocks and a method thereof. The drilling coring device comprises a drilling core drill bit, a vent coupling, a sealing sleeve and a low temperature air supply system, one end of the vent coupling is movably connected with the drilling core drill bit, and the middleof the vent coupling is movably sleeved with a sealing sleeve;the drilling coring method for the weakly cemented soft rocks comprises the following steps of 1, the assembly of the drilling coring device; 2, the adjustment of a low temperature gas supply system;3, the drilling coring of the weakly cemented soft rocks; 4, the removal of rock cores; the deviceachieves inner and outer wall cutting of the soft rock drilling coring processthrough the part, deepinto the inner and outer walls of a drill body, of a drill cutter,the contact between the rock cores and the drill walls is greatly reduced,the vent coupling and the sealing sleeve cooperate to achieve the inflow of cooling gas, large deslagging space is provided for the soft rock drilling coring process, the circulating cooling gas provides power for deslagging, and the success rate of soft rockcoring is improved.

Description

technical field [0001] The invention belongs to the technical field of coring bit processing, and in particular relates to a drilling and coring device for weakly cemented soft rock and a method thereof. Background technique [0002] Laboratory testing is an important means to explore the physical and mechanical properties of rocks. Before laboratory testing, it is necessary to drill and core the rock samples collected on site. However, when studying weakly cemented soft rocks, when drilling During the hole coring process, it is very easy to encounter the problems of core fracture and drill sticking, resulting in a very low success rate of soft rock coring. [0003] In the prior art, on the problem of soft rock coring, some researchers use drilling after freezing, drilling with liquid nitrogen and liquid carbon dioxide as cooling medium, or drilling directly in a freezing environment. Although these methods can improve the success rate, but they will cause great disturbance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00E21B10/02E21B10/43E21B21/16E21B12/00
CPCE21B10/02E21B10/43E21B12/00E21B21/16E21B25/00
Inventor 程桦林键曹广勇席培胜柳军修黄益顺
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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