System and Method for Downhole Telemetry

Abstract

There is provided a dual telemetry measurement while drilling tool string, the tool string comprising a plurality of modules interconnected lengthwise to enable the tool string to be deployed within a drill string, the plurality of modules comprising: a directional module operable to obtain data from at least one sensor; an electromagnetic transmitter module operable to receive a first data input representative of the data obtained by the directional module from the at least one sensor, and operable to send an electromagnetic signal through an earth formation using an electromagnetic signal generated using the first data input; a mud pulse module operable to receive a second data input representative of the data obtained by the directional module from the at least one sensor, and operable to use the second data input to have a series of pulses transmitted through a mud column in the drill string; and at least one battery module for powering the directional module, the electromagnetic transmitter module, and the mud pulse module.

1 . A dual telemetry measurement while drilling tool string, the tool string comprising a plurality of modules interconnected lengthwise to enable the tool string to be deployed within a drill string, the plurality of modules comprising:
 a directional module operable to obtain data from at least one sensor;   an electromagnetic transmitter module operable to receive a first data input representative of the data obtained by the directional module from the at least one sensor, and operable to send an electromagnetic signal through an earth formation using an electromagnetic signal generated using the first data input;   a mud pulse module operable to receive a second data input representative of the data obtained by the directional module from the at least one sensor, and operable to use the second data input to have a series of pulses transmitted through a mud column in the drill string; and   at least one battery module for powering the directional module, the electromagnetic transmitter module, and the mud pulse module.