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 t

Abstract: There is provided a gap sub-assembly for electrically isolating an upstream portion of a drill string from a downstream portion of the drill string. The gap sub-assembly includes a first sub; a second sub; and a non-conductive isolation between the first sub and the second sub, the non-conductive isolation being interposed between respective shoulders of the first sub and the second sub and being interposed between respective threads of a male end of the first sub and a female end of the second sub, the non-conductive isolation comprising an insulative wrapping between at least the respective threads of the first and second subs, wherein connecting the female end of the second sub to the male end of the first sub over the insulative wrapping electrically isolates the respective threads of the first and second subs. A method for assembling such a gap sub-assembly is also provided.

Abstract: A system and method are provided for operating a dual telemetry measurement while drilling (MWD) system. The method includes sending a downlink command to a downhole system to switch between a first telemetry mode and a second telemetry mode, one of the first and second telemetry modes comprising mud pulse telemetry, and the other of the first and second telemetry modes comprising electromagnetic (EM) telemetry.

Abstract: A receiver for a dual telemetry measurement while drilling (MWD) system and method for operating same are provided. The receiver includes a mud pulse receiver module for receiving a first signal sent using mud pulse telemetry via a pressure transducer configured to detect mud pulses transmitted through a mud column in a drill string; an electromagnetic (EM) receiver module for receiving a second signal sent using EM telemetry via the drill string and a formation; and a processer for obtaining the first signal when operating in a mud pulse mode and the second signal when operating in an EM mode and having MWD data displayed at a surface system.

Abstract: A system and method are provided for operating a dual telemetry measurement while drilling (MWD) system. The method includes sending a downlink command to a downhole system to switch between a first telemetry mode and a second telemetry mode, one of the first and second telemetry modes comprising mud pulse telemetry, and the other of the first and second telemetry modes comprising electromagnetic (EM) telemetry.

Abstract: A receiver for a dual telemetry measurement while drilling (MWD) system and method for operating same are provided. The receiver includes a mud pulse receiver module for receiving a first signal sent using mud pulse telemetry via a pressure transducer configured to detect mud pulses transmitted through a mud column in a drill string; an electromagnetic (EM) receiver module for receiving a second signal sent using EM telemetry via the drill string and a formation; and a processer for obtaining the first signal when operating in a mud pulse mode and the second signal when operating in an EM mode and having MWD data displayed at a surface system.

Abstract: There is provided a gap sub-assembly for electrically isolating an upstream portion of a drill string from a downstream portion of the drill string. The gap sub-assembly includes a first sub; a second sub; and a non-conductive isolation between the first sub and the second sub, the non-conductive isolation being interposed between respective shoulders of the first sub and the second sub and being interposed between respective threads of a male end of the first sub and a female end of the second sub, the non-conductive isolation comprising an insulative wrapping between at least the respective threads of the first and second subs, wherein connecting the female end of the second sub to the male end of the first sub over the insulative wrapping electrically isolates the respective threads of the first and second subs. A method for assembling such a gap sub-assembly is also provided.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.

Abstract: A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool.