Underground measurement information transmission system

Abstract

The invention discloses an underground measurement information transmission system and belongs to the field of measurement-while-drilling instruments or non-measurement-while-drilling instruments for petroleum exploration, or mine exploration or geological exploration. The underground measurement information transmission system comprises a drill column, an underground sensor, a ground detecting device and an electrode type transmitting antenna, wherein the drill column comprises a drill stem which is electrically connected with the ground detecting device, a drill collar which is connected with the drill stem, and a drill bit which is connected with the drill collar, the underground sensor is installed on the drill bit, the electrode type transmitting antenna comprises an insulating layer and a metal electrode, the insulating layer is laid on the drill collar, the metal electrode is laid on the insulating layer, a first electrode wire connected with the drill collar and a second electrode wire connected with the metal electrode are led out from the interior of the drill collar, electromagnetic signals are transmitted through the drill collar and the metal electrode, electromagnetic waves are radiated from the electromagnetic signals, and the ground detecting device can obtain data collected by the underground sensor by detecting the electromagnetic waves. The underground measurement information transmission system is higher in universality and can be widely used for transmission of underground measurement information of drilled wells adopting various media as drilling fluid.

Description

technical field [0001] The invention relates to the field of measurement-while-drilling or non-measurement-while-drilling drilling instruments for petroleum, mining or geological exploration, and in particular to an underground measurement information transmission system. Background technique [0002] In petroleum, mining, geological exploration and other drilling projects, in order to make the drilling trajectory more accurate according to the requirements of the engineering design and to grasp the stratum information more timely and accurately, it is necessary to install the directional sensor and the sensor for collecting geological information near the The location of the drill bit. These sensors measure downhole as the drilling rig drills, and at the same time transmit the data collected by the sensors to the ground in real time, so that engineers and technicians can keep abreast of the trajectory of the wellbore and changes in formation information. [0003] At presen...

AI Technical Summary

Problems solved by technology

However, this method can only be used in drilling construction where ordinary mud is the medium, and in underbalanced drilling because the drilling fluid (medium) is compressible gas or foam mud, the pressure pulse will be seriously deformed, and the Ground signal receiving equipment cannot pick up the signal correctly, so this method cannot be used

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