Three-dimensional crustal stress measuring device based on borehole deformation method

Abstract

The invention discloses a three-dimensional crustal stress measuring device based on a borehole deformation method. The device comprises a salvage head, a fishing head is hermetically connected with aring opening of a wedge-shaped fixing ring at the upper part of the circuit protection shell; a waterproof protection cover is arranged in the middle of the circuit protection shell; a sealing waterretaining ring is arranged at the bottom of the circuit protection shell; the axial supporting rod is connected with the inner ring of the sealing water retaining ring in a sealing manner; a deformation inductometer is arranged at the bottom of the axial supporting rod, a plurality of induction elements are arranged in the circumferential direction of the deformation inductometer, and the axial deformation force transmission contact and the radial deformation force transmission contact abut against the corresponding induction elements respectively. The device is ingenious in design, strict inconception, simple in structural system and easy to implement.

Description

technical field [0001] The invention belongs to the field of stress measurement, and specifically relates to a three-dimensional geostress measurement device based on the drilling deformation method, which can finely perceive the drilling deformation in three different directions of the axial and radial directions of the drilling at the same time, and realizes the Three-dimensional geostress measurement; it breaks through the previous problems of difficult axial deformation testing in a single borehole and the complexity of device fixing, improves measurement efficiency and saves measurement costs, and promotes the further development of geostress testing technology. Background technique [0002] In-situ stress exists widely, but it is difficult to obtain and reveal. At the same time, it plays an important role in the planning, design and decision-making of deep engineering. With the continuous exploration of the deep crust by human beings, the importance of in-situ stress h...

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Problems solved by technology

[0006] The object of the present invention is to solve the above-mentioned problems in the prior art, and provide a three-dimensional geostress measurement device based on the drilling deformation method, which has a novel concept, ingenious design, reasonable structure, high reliability, and easy realization, breaking through the long-standing Plagued by the difficulty of axial deformation testing in a single borehole and the complexity of device fixation, the 3D geostress measurement of deep and ultra-deep holes is realized, making the 3D geostress measurement device based on the drilling deformation method a new A generation of deep-hole three-dimensional stress measurement device has broad application prospects

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