UNDERGROUND INSULATING CASING OF DRILL STRING IN SYSTEM AND METHOD MWD Russian patent published in 2020 - IPC E21B17/00 E21B47/01 

FIELD: drilling of wells.

SUBSTANCE: invention relates to a device for transmitting an electrical signal to an electroconductive drill string. Disclosed is a casing design for use as part of an underground tool for installing a transmitter for transmitting a location signal from an underground tool, comprising: main casing for installation of transmitter in working position, during radiation of location signal, and cover detachable installed on casing such that at least a portion of the main casing and the lid portion are arranged opposite for co-forming at least one elongated groove, conducting from outer side of casing design to transmitter.

EFFECT: high protection of the device for transmitting an electrical signal in an unfavorable environment inside the well.

4 cl, 12 dwg