Patent ID: 11970937
Assignee: MWDPLANET AND LUMEN CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E  H | IPC E  H

Claim 10:
11. A method comprising, in a downhole telemetry tool:
connecting a unified MP-EM telemetry assembly to a drilling string, wherein operation of the unified MP-EM telemetry assembly comprises:
receiving, by a signal modulator, direct current (DC) from an electrical power supply, the signal modulator comprising: a first reactive circuit and a second reactive circuit; a first output terminal and a second output terminal for direct or inductive connection to the transmission medium at separate, spaced-apart locations; and a plurality of switches being controlled by the controller to alternatingly switch the signal modulator between a first configuration and a second configuration;
receiving, by the signal modulator, controlling commands from a controller;
transmitting, by the signal modulator, at least one electromagnetic (EM) telemetry signal in response to the controlling commands, the at least one EM telemetry signal transmitted through a transmission medium between a surface location and an underground location or between the underground location and another underground location,
wherein transmitting the at least one EM telemetry signal comprises:
operating the signal modulator in the first configuration, such that an input of the first reactive circuit is at least intermittently connected to the power supply, an output of the first reactive circuit is connected to the first output terminal, and the second output terminal is connected to an electrical return path which bypasses the second reactive circuit; and
at another time, operating the signal modulator in the second configuration, such that an input of the second reactive circuit is at least intermittently connected to the power supply, an output of the second reactive circuit is connected to the second output terminal, and the first output terminal is connected to another electrical return path which bypasses the first reactive circuit, optionally each of the first reactive circuit and the second reactive circuit comprises at least one inductor, at least one capacitor, or at least one inductor and at least one capacitor;

measuring downhole data using a downhole sensor module including at least one downhole sensor;
powering the downhole sensor module and the unified transmitter assembly using at least one battery module;
wherein the unified MP and EM telemetry assembly is connected lengthwise to the downhole sensor module and the at least one battery module.