Antenna direction control device for directional drilling radar

Abstract

The invention discloses an antenna direction control device for a directional drilling radar. The antenna direction control device comprises an antenna outer pipe, an antenna inner pipe, a direction control rotating mechanism and a supporting rotating mechanism. The antenna inner pipe is arranged in the antenna outer pipe, and a main body control unit, a shielding butterfly antenna and an antennapose detection unit are arranged in the antenna inner pipe; the direction control rotating mechanism comprises a driving motor, an inner pipe connecting piece and an outer pipe connecting piece, the inner pipe connecting piece is fixedly connected with a machine body of the driving motor, the outer pipe connecting piece is fixedly connected with a rotating shaft of the driving motor, the inner pipe connecting piece is fixedly connected with the antenna inner pipe, and the outer pipe connecting piece is fixedly connected with the antenna outer pipe; the driving motor and the antenna pose detection unit are electrically connected with the main body control unit respectively; the supporting rotating mechanism comprises a conductive slip ring, a flange connecting piece and a bearing, the antenna inner pipe and an inner ring of the bearing are fixedly connected with the flange connecting piece, the antenna outer pipe is fixedly connected with an outer ring of the bearing, and the main bodycontrol unit is electrically connected with a remote radar host and a power supply through the conductive slip ring. The device can rectify the deviation of the drilling radar.

Description

technical field [0001] The invention relates to the technical field of borehole radar, in particular to an antenna steering device for directional borehole radar. Background technique [0002] The borehole radar developed from the ground radar has basically the same detection principle as the former, but compared with the ground radar, the borehole radar has a deeper detectable depth, and can obtain formation information at a depth of several thousand meters from the orifice at most. Better understand the formation structure surrounding the borehole. As a new type of geophysical detection method, borehole radar has been deeply used in terrain detection, hydrogeology, oil and mineral exploration, tunnel construction advance detection, salt dome survey and other fields. [0003] Borehole radar can be divided into two types: non-directional and directional borehole radar according to whether the azimuth of the target can be determined. Due to the omnidirectionality of the ant...

AI Technical Summary

Problems solved by technology

[0004] With the continuous maturity of directional antenna design technology, the borehole radar realized by method (3) has become the mainstream method for directional detection in wells; however, in actual detection, the antenna is prone to axial rotation and deviation due to the comprehensive action of external forces in the hole. The detection direction is preset, but the target orientation cannot be obtained accurately

Images